Short-term climate response to a freshwater pulse in the Southern Ocean

The short-term response of the climate system to a freshwater anomaly in the Southern Ocean is investigated using a coupled global climate model. As a result of the anomaly, ventilation of deep waters around Antarctica is inhibited, causing a warming of the deep ocean, and a cooling of the surface. The surface cooling causes Antarctic sea-ice to thicken and increase in extent, and this leads to a cooling of Southern Hemisphere surface air temperature. The surface cooling increases over the first 5 years, then remains constant over the next 5 years. There is a more rapid response in the Pacific Ocean, which transmits a signal to the Northern Hemisphere, ultimately causing a shift to the negative phase of the North Atlantic Oscillation in years 5–10

Positive relationships between golf performance variables and upper body power capabilities

The importance of lower body and trunk strength and power, as well as upper body strength in golf is well documented, however the relationship between upper body power and golf performance has yet to be determined. Therefore, the purpose of the study was to investigate the relationships between golf performance and upper body power. Thirteen golfers (mean ± SD: age: 30 ± 7 years and handicap: 6.1 ± 4.9) participated in the study. Club head velocity (CHV) and ball velocity were measured during the golf test. In order to assess upper body power, subjects completed a ballistic bench press and upper body Wingate test. Pearson product-moment correlations were used to assess the relationships between golf performance and upper body power. The results demonstrated that there were strong relationships between ballistic bench press and CHV and ball velocity when using the driver (r > 0.6 - 0.7), and moderate to strong relationships (r > 0.4 - 0.6) when using the 7-iron. Strong relationships were found between the upper body Wingate test and CHV and ball velocity (r > 0.5 - 0.8) when using the driver and 7-iron. As a results of the findings, strength and conditioning coaches may use both the ballistic bench press test and the Wingate test as a primary assessment to measure the effectiveness of upper body training interventions with the aim of improving golf performance. Although, when performing the golf swings at higher velocities (i.e. with the driver), the ballistic bench press may be a more beneficial

The association of golf participation with health and wellbeing:a comparative study

Golf participation is comprised of activities likely to be beneficial to a golfer’s health and wellbeing, including regular walking and social interactions. This study aimed to use a questionnaire to compare physical activity, social trust and personal wellbeing of golfers with National statistics. Furthermore, the study aimed to measure the association between golfers’ physical activity levels and self-efficacy for both golf and general exercise participation. Results demonstrated that golfers reported significantly different physical activity levels in comparison to the population of England. Golfers scored significantly higher on social trust and personal wellbeing compared to the population of the UK and England respectively. Golf and exercise self-efficacy were significantly associated with physical activity. The findings of the study demonstrate that, despite golfers having relatively lower levels of physical activity, golf participation is associated with psychological wellbeing. Coaches, golfers and others promoting golf participation may benefit from the results of this study due to an increased awareness of the possible benefits of golf participation

Groundwater Modelling Uncertainty : implications for decision-making : summary of the Groundwater Modelling Uncertainty Workshop - Australasian Groundwater Conference 10th July 2017, University of NSW, Sydney, Australia

The information contained in this document is the property of NCGRT. Use or copying of this document in whole or part without the written permission of NCGRT constitutes an infringement of copyright.This report provides a summary of the outcomes from the 2017 national groundwater modelling uncertainty workshop convened by the National Centre for Groundwater Research and Training (NCGRT), and the subsequent modelling outlook panel session held at the Australasian Groundwater Conference (AGC) on 10 and 13 July 2017, respectively. The purpose of this report is to provide simple documentation of the workshop proceedings (inputs, outputs and discussions). It has been reviewed (refer to Acknowledgements) and has been subject to basic editorial procedures

The biogeography of South African terrestrial plant invasions

Thousands of plant species have been introduced, intentionally and accidentally, to South Africa from many parts of the world. Alien plants are now conspicuous features of many South African landscapes and hundreds of species have naturalised (i.e. reproduce regularly without human intervention), many of which are also invasive (i.e. have spread over long distances). There is no comprehensive inventory of alien, naturalised, and invasive plants for South Africa, but 327 plant taxa, most of which are invasive, are listed in national legislation. We collated records of 759 plant taxa in 126 families and 418 genera that have naturalised in natural and semi-natural ecosystems. Over half of these naturalised taxa are trees or shrubs, just under a tenth are in the families Fabaceae (73 taxa) and Asteraceae (64); genera with the most species are Eucalyptus,Acacia, and Opuntia. The southern African Plant Invaders Atlas (SAPIA) provides the best data for assessing the extent of invasions at the national scale. SAPIA data show that naturalised plants occur in 83% of quarter-degree grid cells in the country. While SAPIA data highlight general distribution patterns (high alien plant species richness in areas with high native plant species richness and around the main human settlements), an accurate, repeatable method for estimating the area invaded by plants is lacking. Introductions and dissemination of alien plants over more than three centuries, and invasions over at least 120 years (and especially in the last 50 years) have shaped the distribution of alien plants in South Africa. Distribution patterns of naturalised and invasive plants define four ecologically-meaningful clusters or “alien plant species assemblage zones”, each with signature alien plant taxa for which trait-environment interactions can be postulated as strong determinants of success. Some widespread invasive taxa occur in high frequencies across multiple zones; these taxa occur mainly in riparian zones and other azonal habitats,or depend on human-mediated disturbance, which weakens or overcomes the factors that determine specificity to any biogeographical region

Immersed superhydrophobic surfaces: Gas exchange, slip and drag reduction properties

Superhydrophobic surfaces combine high aspect ratio micro- or nano-topography and hydrophobic surface chemistry to create super water-repellent surfaces. Most studies consider their effect on droplets, which ball-up and roll-off. However, their properties are not restricted to modification of the behaviour of droplets, but potentially influence any process occurring at the solid-liquid interface. Here, we highlight three recent developments focused on the theme of immersed superhydrophobic surfaces. The first illustrates the ability of a superhydrophobic surface to act as a gas exchange membrane, the second demonstrates a reduction in drag during flow through small tubes and the third considers a macroscopic experiment demonstrating an increase in the terminal velocity of settling spheres

What should we assess in practice?

Aim: This article reports on a PhD study and follow up work undertaken to review and develop a tool for assessment of practice. Background: The assessment of practice in nursing and midwifery education and, other health professions has been the source of concern, criticism and research for a number of years with the conclusion that it might not be possible to develop an assessment tool that could encompass all aspects of professional practice. Methods: A qualitative evaluation study was undertaken using the naturalistic method of inquiry. A combination of tools was used in order to collect the data and enable progressive focusing and cross checking of the findings. These included documentary analysis, a questionnaire and focus group and individual interviews. The data was collected from documents analysis, focus group interviews, individual interviews and questionnaires. Results: The results showed that the assessment tool in use at the time did not encompass all criteria assessors used and six areas were identified as those to include in any future tool. Conclusion: The six areas identified by subjects as those to include in any assessment tool were further developed with specific statements so that they could be used within a tool. Implications for nursing management and education: Within the changing nature of health care there is a need to review whether the tool used for assessing pre-registration education of nursing and midwifery students practice is ‘fit for purpose’