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881.
Uwe K. Jenisch 《WMU Journal of Maritime Affairs》2004,3(1):67-83
The purpose of this paper is to summarize the European maritime transport policy within the context of maritime politics at
large. At the outset the legal framework conditions and supportive instruments for the shipping and port industries are presented.
Against the background of recent accidents at sea, such as the sinking of ERIKA and PRESTIGE, the EU legislation on maritime
safety is of particular interest as it is both complex and rapid in reaction to environmental needs and political pressure.
Finally, the sensible relationship between the EU as a regional organization and the IMO as “the competent international organization”
is discussed with a view to reconcile possible rivalry and to suggest a complementary cooperation between the two organizations. 相似文献
882.
The share of immobile persons, i.e. persons not leaving their homes on a given reporting day, is both a central result and
a prime quality indicator of a travel diary survey. The wide range of values for the share of immobiles reported in travel
diary and time budget survey literature has motivated this in-depth analysis of the reasons for these disparities. This paper
collates available evidence on the share of immobiles in travel diary surveys. The share of these non-travellers (UK), or
no-trippers (US), varies greatly between otherwise similar surveys. After analysing both disaggregate and aggregate information,
this paper concludes that the share of immobiles should be in the range of 8%–12% for the standard one-day, weekday-only travel
diary. The analysis suggests that a substantial share of respondents refuse to participate in a soft way, i.e. by claiming
not to have left the house. In its conclusions, the paper sketches new ways to reduce the share of such soft refusers during
the interview and to identify them during the analysis.
相似文献
883.
Modelling the temporal response of travellers to transport policy interventions has rapidly emerged as a major issue in many
practical transport planning studies and is recognised to hold particular challenges. The importance of congestion and its
variation over the day, together with the emergence of time-dependent road user charging as a policy tool, emphasise the need
to understand whether and how travellers will change the timing of their journeys. For practical planning studies, analysts
face a major issue of relating temporal changes to other behavioural changes that are likely to result from policy or exogenous
changes. In particular, the relative sensitivity of time and mode switching has been difficult to resolve. This paper describes
a study undertaken to determine the relative sensitivity of mode and time of day choice to changes in travel times and costs
and to investigate whether evidence exists of varying magnitudes of unobservable influences in time of day switching. The
study draws on data from three related stated preference studies undertaken over the past decade in the United Kingdom and
the Netherlands and uses error components logit models to investigate the patterns of substitution between mode and time of
day alternatives. It is concluded that the magnitude of unobserved influences on time switching depends significantly on the
magnitudes of the time switches considered. With time periods of the magnitude generally represented in practical modelling,
i.e. peak periods of 2–3 hours, time switching is generally more sensitive in these data than mode switching. However, the
context of the modelling and the extent to which relevant variables can be measured will strongly influence these results. 相似文献
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Stefano Bruni Roger Goodall T. X. Mei Hitoshi Tsunashima 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(7):743-779
Over the last twenty to thirty years, railway vehicle dynamics has changed from being an essentially mechanical engineering discipline to one that is increasingly starting to include sensors, electronics and computer processing. This paper surveys the application of these technologies to suspensions and running gear, focused upon the complementary issues of control (which has been reviewed within Vehicle System Dynamics previously) and monitoring (which has not previously been reviewed). The theory, concepts and implementation status are assessed in each case, from which the paper identifies the key trends and concludes with a forward look at what is likely to develop over the next years. 相似文献