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This chapter outlines complex and conflicting issues related to designing tall buildings. It gathers a vast amount of fragmented criticism and concerns and organizes them around the three pillars of sustainability: social, economic, and environmental. Mapping out the “unsustainable” aspects forms the foundation for addressing them in future research and tall building developments. The chapter engages the reader with a preliminary discussion on potential solutions to the outlined problems. It also balances extensive criticism by highlighting the virtues and advantages of tall buildings. Consequently, this chapter forms a foundation for improving the sustainability of tall buildings whenever and wherever they are constructed.

To examine the role of new aeronautical technologies in improving commercial aviation’s environmental performance.

Reviews the environmental improvements that may be conferred through the adoption of alternative aviation fuels and new airframe, engine and navigation technologies.

Although aeronautical technologies have evolved considerably since the earliest days of powered flight, the aviation industry is now reaching a point of diminishing returns as growing global consumer demand for air transport outstrips incremental improvements in environmental efficiency. The chapter describes some of the technological interventions that are being pursued to improve aviation’s environmental performance and discusses the extent to which these innovations will help to deliver a more sustainable aviation industry.

The purpose of this study was to examine the prevalence of social suffering among a non-random sample of Canadian women working in socially and economically marginalized “frontline” service occupations. Participants identified a number of health concerns that they link to the everyday suffering they endure – i.e. feeling inadequate, incompetent, lonely, self-conscious, disenfranchised or dissatisfied. The complex etiology of these women's suffering bars many from finding appropriate health care. As a result, there are health disparities among our vulnerable populations. While they often articulated a desire for alternative/complementary care, the Canadian health care system does not currently fund these services and many of the women are unable to afford the out-of-pocket costs.

The vehicle–track interaction and the resulting dynamic response of the vehicle involve a number of complex nonlinear problems. Large vertical loads act through a small contact patch leading to very high contact pressures. Transverse loads acting through this contact induce a relative velocity between wheel and rail expressed in non-dimensional form as a creepage. The wheel and rail profiles determine the contact patch shape and affect the ability of the vehicle to run stably. If the yaw stiffness of the axles is too low, the vehicle will become unstable at a relatively low speed; conversely, if the yaw stiffness is too high, the curving behaviour will be adversely affected. The vehicle suspension, especially the secondary suspension, also affects the ride comfort of passengers. Finally, it is shown how the speed profiles of accelerating and decelerating trains can be calculated from basic assumptions about the train power, adhesion and rolling resistance.