Travel to school and housing markets: a case study of Sheffield, England

How children travel to school is at the centre of a complex set of interrelated issues with significant policy implications. This paper reviews the relation of patterns of travel to school to concerns about public health, school choice, urban form, and residential housing markets. The spatial relations between pupils’ homes and the schools that they attend provides the basis of an analytical framework that links local neighbourhood characteristics, school performance, and house prices to the distance and mode of travel to school and the level of ‘excess commuting’ in the urban system. A unique analysis of several integrated micro-datasets from Sheffield, UK, suggests that, while there are high levels of excess commuting, there remains a complex interrelationship between housing and neighbourhood characteristics, school performance, and commuting patterns. There are differences between the pictures for primary schools and secondary schools. Policies aimed at promoting transport efficiency and those promoting school choice are likely to remain in tension

Performance of a data-driven technique applied to changes in wave height and its effect on beach response

AbstractIn this study the medium-term response of beach profiles was investigated at two sites: a gently sloping sandy beach and a steeper mixed sand and gravel beach. The former is the Duck site in North Carolina, on the east coast of the USA, which is exposed to Atlantic Ocean swells and storm waves, and the latter is the Milford-on-Sea site at Christchurch Bay, on the south coast of England, which is partially sheltered from Atlantic swells but has a directionally bimodal wave exposure. The data sets comprise detailed bathymetric surveys of beach profiles covering a period of more than 25 years for the Duck site and over 18 years for the Milford-on-Sea site. The structure of the data sets and the data-driven methods are described. Canonical correlation analysis (CCA) was used to find linkages between the wave characteristics and beach profiles. The sensitivity of the linkages was investigated by deploying a wave height threshold to filter out the smaller waves incrementally. The results of the analysis indicate that, for the gently sloping sandy beach, waves of all heights are important to the morphological response. For the mixed sand and gravel beach, filtering the smaller waves improves the statistical fit and it suggests that low-height waves do not play a primary role in the medium-term morphological response, which is primarily driven by the intermittent larger storm waves

Experimental study of pedestrian flow through a bottleneck

In this work the results of a bottleneck experiment with pedestrians are presented in the form of total times, fluxes, specific fluxes, and time gaps. A main aim was to find the dependence of these values from the bottleneck width. The results show a linear decline of the specific flux with increasing width as long as only one person at a time can pass, and a constant value for larger bottleneck widths. Differences between small (one person at a time) and wide bottlenecks (two persons at a time) were also found in the distribution of time gaps.Comment: accepted for publication in J. Stat. Mec

Adaptation to flooding in low‐income urban settlements in the least developed countries: A systems approach

This study aims to use a whole systems approach (1) to understand the processes of adaptation to flooding of the urban poor; (2) to identify new knowledge of how low‐income settlements might better adapt to climatic risks; and (3) to begin to develop appropriate guidance on this. Low‐income urban settlements in the least developed countries (LDCs) present an extreme case where catastrophic natural hazards and chronic social hazards overlap. These low‐income urban populations face the greatest adaptation challenges as they often occupy informal settlements that are particularly exposed to hazards, and have multiple vulnerabilities arising from their lack of basic services. There is a dynamic complexity of issues arising from the many levels of actor involved and multiple social and physical factors. Analysing such a complex phenomenon calls for a specific conceptual framing, and a systems theory approach is suggested to provide a holistic perspective. The case study for this research is located in Dhaka East, where there is both high vulnerability to flooding, and a significant low‐income population. The research has adopted a mixed methods approach involving different data collection methods governed by the different scales and actors being investigated. The research develops new systems understandings of perceptions and experiences of the local population about adaptation processes in low‐income urban settlements, and how these processes may be positively influenced by integrating bottom‐up and top‐down approaches

Derailment-based fault tree analysis on risk management of railway turnout systems

Railway turnouts are fundamental mechanical infrastructures, which allow a rolling stock to divert one direction to another. As those are of a large number of engineering subsystems, e.g. track, signalling, earthworks, these particular sub-systems are expected to induce high potential through various kind of failure mechanisms. This could be a cause of any catastrophic event. A derailment, one of undesirable events in railway operation, often results, albeit rare occurs, in damaging to rolling stock, railway infrastructure and disrupt service, and has the potential to cause casualties and even loss of lives. As a result, it is quite significant that a well-designed risk analysis is performed to create awareness of hazards and to identify what parts of the systems may be at risk. This study will focus on all types of environment based failures as a result of numerous contributing factors noted officially as accident reports. This risk analysis is designed to help industry to minimise the occurrence of accidents at railway turnouts. The methodology of the study relies on accurate assessment of derailment likelihood, and is based on statistical multiple factors-integrated accident rate analysis. The study is prepared in the way of establishing product risks and faults, and showing the impact of potential process by Boolean algebra

Finnieston Bridge

Detail, showing support hangers on each side of the arch; A road bridge spanning the River Clyde, connecting Finnieston, near the Clyde Auditorium and SECC with Pacific Quay and Glasgow Science Centre in Govan. A prominent feature of the bridge is its innovative curved design and the way that it crosses the river at an angle. The Arc is the first city center traffic crossing over the river built since the Kingston Bridge was opened to traffic in 1969. The bridge was designed by the Halcrow Group and built by Kilsyth-based civil engineering company Edmund Nuttall. The bridge has a main span of 96 m with two end spans of 36.5 m (total 169 m). The design of the main span features a single steel arch that crosses the bed of the bridge. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 7/6/2012

Finnieston Bridge

Overall view from the river bank, showing support hangers on each side of the arch; A road bridge spanning the River Clyde, connecting Finnieston, near the Clyde Auditorium and SECC with Pacific Quay and Glasgow Science Centre in Govan. A prominent feature of the bridge is its innovative curved design and the way that it crosses the river at an angle. The Arc is the first city center traffic crossing over the river built since the Kingston Bridge was opened to traffic in 1969. The bridge was designed by the Halcrow Group and built by Kilsyth-based civil engineering company Edmund Nuttall. The bridge has a main span of 96 m with two end spans of 36.5 m (total 169 m). The design of the main span features a single steel arch that crosses the bed of the bridge. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 7/6/2012

Finnieston Bridge

Overall aerial view of complex, showing grass roofs, looking south across Calton Rd., New Street on the left; A road bridge spanning the River Clyde, connecting Finnieston, near the Clyde Auditorium and SECC with Pacific Quay and Glasgow Science Centre in Govan. A prominent feature of the bridge is its innovative curved design and the way that it crosses the river at an angle. The Arc is the first city center traffic crossing over the river built since the Kingston Bridge was opened to traffic in 1969. The bridge was designed by the Halcrow Group and built by Kilsyth-based civil engineering company Edmund Nuttall. The bridge has a main span of 96 m with two end spans of 36.5 m (total 169 m). The design of the main span features a single steel arch that crosses the bed of the bridge. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 7/6/2012