A week in the life of baby boomers: how do they see the spatial–temporal organization of their activities and travel?

In this paper, we take an initial look at the spatial and temporal flexibility in the activity patterns of the so-called “baby-boomer” cohort (born 1947–1966) in comparison with younger and older adults. Using a unique longitudinal survey carried in Quebec City from 2002 to 2005, we explore activity patterns and trip rates over a seven-day observation period during the first wave, and take a first look at some aspects of their evolution over two subsequent waves at about one-year intervals. We model the propensity to undertake activities within selected conventional non-work classifications such as “shopping” and “leisure”, and also according to respondents’ own perceptions of the spatial and temporal flexibility of each out-of-home activity that they had executed. While we cannot strictly separate cohort effects from age-related effects, after controlling for gender and household structure, we infer that age and related lifestyle effects dominate in explaining these propensities. However, the boomers were the only age stratum to increase their total out-of-home activity participation over the course of the panel, an intriguing starting point for the future study of this cohort.

Part 1. National road safety performance: Data,the emergence of two single-outcome modeling streams and public health

This first part of the state-of-the art focuses on the origins of road safety modeling, covering data, early models and the public health context of model formulation and use.     

4600TEU集装箱船总体设计

4600 TEU集装箱船是上海船舶研究设计院独立自主开发设计的新一代集装箱船型,是世界上第一艘实船建造的"迷你超巴拿马型船"。从线型设计、总布置设计、破舱稳性研究和燃油舱布置设计4个方面详细介绍了在总体设计中的关键技术,并对涉及到的部分技术问题和解决方法进行了详细阐述。     

迷你超巴拿马型集装箱船的特点与趋势

通过对迷你超巴拿马型船型的历史背景、演变过程以及船型特点的分析,阐述了该船型相对传统船型的优势,指出了制约其未来发展空间的局限因素。