Comparison of surface temperatures of different synthetic turf systems and natural grass: Have advances in synthetic turf technology made a difference
- Authors: Petrass, Lauren , Twomey, Dara , Harvey, Jack , Otago, Leonie , Lerossignol, Peter
- Date: 2015
- Type: Text , Conference paper
- Relation: Vol. 229
- Full Text: false
- Reviewed:
- Description: Few studies have considered surface temperatures on the most recent synthetic turf products, and no empirical evidence is available on the more technologically advanced cool climate synthetic products which claim to reduce surface temperature. This article compared surface temperatures of typical third-generation synthetic turf with a cool climate product and also compared the synthetic turf products to natural grass to determine whether synthetic turf reacts differently to environmental factors and hence may increase heat-related health risks for participants. Surface temperatures were significantly associated with ambient temperature (F3,376 = 116.02, p < 0.001), relative humidity (F1,376 = 10.15, p = 0.028), and wind (F1,376 = 1.45, p = 0.004) having smaller effects. After adjustment for covariates, mean surface temperatures were significantly lower (40.79 °C) on a cool climate field compared to a typical third-generation field (44.91 °C), although both synthetic fields were considerably warmer than natural grass at the same venue (by 12.46 °C at the metropolitan venue and 22.15 °C at the regional venue). These findings provide initial insight into the potential value of cool climate products and will aid both design and development of synthetic turf products for the future. © IMechE 2014.
Can you swim? Teaching teachers of swimming and water safety
- Authors: McElroy, G. Keith , Blitvich, Jennifer , Petrass, Lauren
- Date: 2014
- Type: Text , Conference paper
- Relation: Proceedings of the XIIth International Symposium for Biomechanics and Medicine in Swimming p. 553-558
- Full Text: false
- Reviewed:
Rotational traction testing : How can we improve the current test device?
- Authors: Twomey, Dara , Connell, Monique , Petrass, Lauren
- Date: 2014
- Type: Text , Conference paper
- Relation: 2014 10th Conference of the International Sports Engineering Association, ISEA 2014; Sheffield, United Kingdom; 14th-17th July 2014; published in Procedia Engineering, Vol. 72, p. 919-924
- Full Text:
- Reviewed:
- Description: Rotational resistance is an important sports surface property in optimising both performance and safety for participants. Despite various attempts to create valid devices to measure the rotational traction, the Studded Boot Apparatus (SBA) originally developed in 1975 is still used in the synthetic turf standards of many governing bodies of sport. In addition to validity limitations, poor operator reliability of the SBA has been reported and it was postulated that the manual nature of the device contributed significantly to this result. Therefore, the aim of this paper is to present data on the automation of the SBA and to discuss the reliability and validity issues of the device. An automated version of the SBA was developed called the UB Turf Tester (UBTT) and data was collected by ten inexperienced operators using the original SBA and the UBTT. Testing was undertaken on a synthetic turf and each operator completed ten trials with each device. Despite a slightly greater peak traction value for the UBTT, there was no significant difference between the peak traction for the two devices, F 1,2 = 0.341, p = 0.57. Greater reliability was found between operators for the UB Turf Tester. Given that the SBA is still commonly used to comply with standards, achieving the highest level of intra- and inter-operator reliability is both desirable and invaluable. However, the research on the validity of the device also needs to continue. Interestingly, limitations of the device were identified when it was first developed but very few adaptations have been implemented since then. Undoubtedly, the interaction between the human and the surface is a complex phenomenon but the weight force, the level of penetration, the pattern, shape and position of the cleats and the possibility of measuring rotational stiffness rather than peak traction all require further discussion and investigation.
Understanding how the components of a synthetic turf system contribute to increased surface temperature C3 - Procedia Engineering
- Authors: Petrass, Lauren , Twomey, Dara , Harvey, Jack
- Date: 2014
- Type: Text , Conference paper
- Relation: 2014 10th Conference of the International Sports Engineering Association, ISEA 2014 Vol. 72, p. 943-948
- Full Text:
- Reviewed:
- Description: Surface temperatures of synthetic turf have become a factor of growing interest and concern, particularly in warmer regions like Australia. However, it is unclear which components of the synthetic turf system contribute to surface temperature. The aim of this paper was to compare the surface temperature of 34 different synthetic turf products that were exposed to the same environmental conditions to ascertain which components of the synthetic turf system and which environmental factors contributed to increased surface temperature. A total of 6,120 observations were taken on the 34 products over the summer months, giving 30 observations for each of the variables on each product. An analysis of covariance (ANCOVA) indicated that the type of infill and shockpad had small-medium, but significant, effects on surface temperature (p<0.001 and p=0.003, respectively), and the interaction between shockpad and tuft gauge was also significant (p=0.047). Level of solar radiation, ambient temperature and relative humidity (p<0.001 in all instances) were the only environmental variables that significantly influenced surface temperature. These findings confirm that both the composition of the synthetic turf system and environmental factors contribute to synthetic turf surface temperature, thus providing important information for synthetic turf manufacturers developing new cool climate products, or for local government authorities selecting products and/or informing safe play for end-users.
- Description: E1
How do parents supervise their children at pools and playgrounds?
- Authors: Petrass, Lauren , Blitvich, Jennifer , Finch, Caroline
- Date: 2008
- Type: Text , Conference paper
- Relation: Paper presented at 2008 Australian Water Safety Conference : Water safety - everyone's responsibility, Crowne Plaza Darling Harbour, Sydney, New South Wales : 15th-16th May 2008 p. 30-33
- Full Text:
- Description: Methods: A six-hour observation of behaviour potentially associated with injury risk was conducted at six public pools and four playgrounds. Supervision and behaviour were quantified using an observational tool based on the Saluja et al.1 model and Morrongiello’s 2 definition of supervision. Infants to 10 year-old children engaged in play and their carers were observed. Child behaviour, corresponding parent supervision, and parental intervention were recorded. Results/Evaluation: Chi-square tests showed higher levels of supervision were associated with specific behaviours in pools and playgrounds. Factors significantly linked to level of parental supervision included child age; parent age; number of children for whom parents were responsible; and in aquatic settings, swimming ability of the child. Discussion: Level of parental supervision differs with children’s play. Despite increased dangers in aquatic environments, parents supervised less at pools than playgrounds highlighting inappropriate parental dependence on lifeguards. Conclusion: Future research examining the relationship between supervision and young children’s risk of drowning at other aquatic environments is required. Attention, proximity and continuity of supervision should be assessed. Findings will enable key water safety stakeholders to further highlight this phenomenon in drowning prevention programs.
- Description: 2003007681
Moving forward : How best do we investigate parental supervision of children at the beach?
- Authors: Blitvich, Jennifer , Petrass, Lauren , Finch, Caroline
- Date: 2008
- Type: Text , Conference paper
- Relation: Paper presented at 2008 Australian Water Safety Conference : Water safety - everyone's responsibility, Crowne Plaza Darling Harbour, Sydney, New South Wales : 15th-16th May 2008 p. 103-106
- Full Text:
- Description: Introduction/background: Previous University of Ballarat research identified that parents supervise their children with less vigilance at swimming pools than playgrounds, despite the serious consequences potentially associated with inadequate supervision at pools. The closed environment of public pools and the presence of lifeguards may be influential in lowering parental guard. The proposed research project aims to investigate parental supervision at beaches, specifically related to child injury risk and drowning prevention. The research is still in the design phase and the researchers seek input from water safety experts to assist in project development. This session will be interactive, providing ample opportunity for audience members to contribute to discussion. Methods: Following a brief outline of our research to date and current plans for further research, the presenters will invite expert comment from conference delegates regarding study design. It is anticipated that the ensuing discussion will be interesting and stimulating. Discussion: Consequent to this session and the discussion it fosters, the researchers will refine their research plans. The opportunity to receive input from the group of interested and concerned individuals who make up the Water Safety 2008 audience will enhance the proposed research, leading to an improved research project, the findings of which will help water safety stakeholders in targeting their drowning prevention programs. Conclusion: Expert opinion is a recognised process for research design development. Water Safety 2008 provides an ideal forum to enhance the proposed research through interaction with practitioners. In turn, the findings of this research will provide important information to those actively involved in the fight against drowning.
- Description: 2003007659