Preventing child pedestrian injuries and deaths arising from vehicle-child accidents in domestic driveways: An action research project

This research was a three-fold investigation into the viability of previous recommendations for vehicle-related child driveway accident safety . Firstly, the groups most at risk of these types of accidents were determined in order that they could be specifically considered when reviewing the practicalities of previous recommendations . Secondly, the feasibility of previous recommendations was systematically examined through both an extensive literature review and key and expert informant interviews . Based on these, the likelihood of implementation of previous safety recommendations for the identified high risk groups was ascertained, providing a basis on which to abandon some previous recommendations, remove obstacles to others which would enhance practicability and generate further recommendations that would be tenable for the at-risk groups in particular. The key findings of this research were, foremost, that there is a noticeable lack of specific reference to vehicle-related child driveway accidents in any legislation or safety guidelines, as well as a shortage of official data that deal expressly with this type of accident. Further, it was found that the major obstacles to the implementation of previous recommendations - particularly the environmental ones - were cost, autonomy, and spatial constraints. While several recommendations were abandoned due to factors such as unproven or dubious effectiveness and/or prohibitive cost, it was found that the most viable recommendations were characterised by their relatively low cost for the families involved. These recommendations were typically environmental or educational in nature. Thus, the recommendations in this report include some moderate regulatory changes to facilitate greater uptake of environmental and behaviour-modifying recommendations as well as practical ideas that all need to be part of a cohesive campaign to address the issue of vehicle-related child driveway accidents in New Zealand

Differential phase technique with the Keck Interferometer

We present the motivation and development of the novel `differential phase' technique being developed for the Keck Interferometer with the goal of detecting faint companions near a bright source. The differential phase technique uses simultaneous phase measurements at several infrared wavelengths to detect the astrophysical signature produced by a chromatic, asymmetric brightness distribution. We discuss the origin of the differential phase signature and present results of test observations taken at the Palomar Testbed Interferometer. One important test result is the larger than expected effect of water vapor turbulence on these multi-wavelength observations due to the infrared dispersion of water. In order to reach the design goal of 0.1 milliradians, the phase noise caused by both temperature and water vapor fluctuations in the atmosphere must be corrected, and we discuss several ways to achieve this