Time filter

Source Type

Lower Hutt, New Zealand

Herrington P.R.,Opus Research
International Journal of Pavement Engineering | Year: 2015

A small-scale apparatus was constructed to measure the ‘adhesion temperature’, at which bitumen ‘pick-up’ onto tyre rubber (and subsequent tracking) occurs. Loading frequencies equivalent to traffic speeds of over 100 km hr−1 and realistic tyre footprint pressures were used. The adhesion temperature increased with loading frequency, but all of the bitumens and polymer-modified bitumens studied had adhesion temperatures (i.e. the temperature at which the bitumen failed cohesively) at or below 60 °C, a temperature easily reached in the field. The results confirm the findings of an earlier slow-speed study (at 1.6 km hr−1) and indicate that the adhesion temperature under realistic loading conditions is governed by the properties of the bitumen, i.e. the bitumen yield stress is lower than that of the adhesive bond formed as the tyre traverses the bitumen. © 2015 Taylor & Francis Source

Despite evidence that the correct use of child restraints significantly reduces the risk of fatality for young children in vehicle accidents, a small proportion (about 8%) of parents and caregivers do not use these restraints. Previous research into barriers to the use of child restraints has examined many factors, with economic barriers the most commonly studied, but with mixed results. This research examines restraint use in New Zealand prior to a change to a higher legal age requirement. Knowledge of the existing law was low, but results showed support for the new requirements. As expected, expense was a commonly perceived barrier. However, no relationship between income and use was found. Low-cost alternatives, such as restraint rental services, are discussed. Of particular interest is the role second-hand restraints could play in increasing use through increased ownership. Further research into information provision around restraint types is suggested. Source

Alabaster D.,NZ Transport Agency | Herrington P.,Opus Research | Waters J.,Fulton Hogan
Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014 | Year: 2014

The NZ Transport Agency's (NZTA) has been developing an epoxy- modified Open-Graded Porous Asphalt (OGPA) with the aim of creating a low-maintenance long-life (>30 years) low noise surfacing material. The New Zealand laboratory studies and field trials form part of a larger collaborative research programme conducted under the auspices of the OECD/ECMT (European Conference of Ministers of Transport) Joint Transport Research Centre, focused on the economic evaluation of long-life pavements. Investigations into the cohesive properties and oxidation resistance of an acid-cured, epoxy-modified OGPA were undertaken in the laboratory. The initial trials at the NZTA's Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF) demonstrated the practicality of the project. A field trial constructed on State Highway 1 in Christchurch in December 2007 demonstrated that full-scale manufacture and construction using the epoxy OGPA, could be undertaken without any significant modification to plant or operating procedures in a normal surfacing operation. The trial has been in place for 6 years and is performing well. The original 2007 work has been optimised for cost, manufacture and construction. Test sections were placed on the Christchurch Southern Motorway in 2012 and this paper reports the optimisation and findings on manufacture and construction of the 2012 test sections. © 2014 Taylor & Francis Group, London. Source

Miller D.,Opus Research | Fauve B.,ValidSoft
Biometric Technology Today | Year: 2012

Around the world, rapid change is afoot in how people carry out personal business - between one another or with their banks, telephone companies, retailers and healthcare providers. The Internet is at the centre of this movement, bringing a combination of electronic commerce and social networking. So is the rapid proliferation of mobile phones and other mobile devices. Multifactor authentication, including biometric speaker verification and identification, is poised to play an important role in building trusted communications. © 2012 Elsevier Ltd. Source

Mora K.,Opus Research | Chang J.,Opus Christchurch | Beatson A.,Opus Research | Morahan C.,Opus Christchurch
International Journal of Disaster Risk Reduction | Year: 2015

Following the 2010 and 2011 Canterbury earthquakes, the subject of building safety has had a high profile in New Zealand, with building seismic standards coming under scrutiny. Greater public interest in commercial building safety, and policy aims of increasing investment in seismic improvements for disaster risk reduction requires better methods of communicating building risk, and the elements that affect structural damage. Two qualitative analyses were conducted; an analysis of Twitter postings in the immediate wake of the February 2011 event, followed by focus group analyses of perceptions almost two years later. Life-preservation was found to be more important than functionality of buildings, and experience was found to affect the features the public look for to identify "safe" buildings. The most important feature was found to be the provision of safe exits from buildings, rather than design features such as height and materials. Recommendations for better communication of the meaning, benefits and limitations of building seismic standards are made. © 2015 Elsevier Ltd. Source

Discover hidden collaborations