Determination of football pitch locations from video footage and official pitch markings

The ability to determine a specific location on a football (soccer) pitch from television footage would provide a cost-effective method of obtaining competition-specific information on many professional and international teams. This study presents the accuracy and reliability of a new method of calculating ball location from simulated television coverage and known pitch markings. The coordinates of 99 markers of known location on a football pitch were digitized from video. An intersection point was determined from the equations of two lines that form pitch markings and the relationship from this point to other known pitch coordinates was calculated using a curve-fitting based method. Average error between known and reconstructed measures was 0.21 m for pitch width and 0.11 m for pitch length from a view simulating television coverage. Inter- and intra-rater reliability analyses showed researchers could consistently reconstruct pitch locations to within less than half a metre. The accuracy and reliability of this method will be sufficient for most practical uses in an applied sport environment, although the level of accuracy required will depend on the specific application. This method could be applied to other sports to determine specific locations on a pitch or court or to improve current competition analysis systems.     

A Survey of Opinions and Attitudes Toward Exercise Following a 12-month Maintenance Exercise Program for People with COPD

Purpose

To determine the opinions and attitudes toward exercise in people with chronic obstructive pulmonary disease (COPD) who had completed a randomised controlled trial of 12-months maintenance exercise.

Methods

Participants were eligible for recruitment to the maintenance exercise study if they had COPD and had completed an 8-week pulmonary rehabilitation program. They were randomized into an Intervention Group (IG) that consisted of once weekly, supervised hospital-based maintenance exercise plus home exercise for 12 months or a Control Group that undertook unsupervised home maintenance exercise for 12 months. At the end of the 12 months, participants completed a survey consisting of 23 questions using a visual analogue scale (VAS) of 100 mm.

Results

Forty-eight participants completed the 12 month study and 36 participants (75%) completed the survey [IG mean (SD): age 65 (8) years, FEV₁ 58 (20) % predicted; CG: age 66 (8) years, FEV₁ 67 (17) % predicted]. No between group difference was found for the importance of exercise, the benefits of the program or the importance of support from the physiotherapist. However, the IG reported exercising more regularly, having more enjoyment of being involved in the maintenance exercise program, greater benefit in general well-being, and better physical fitness.

Conclusions

At the completion of the 12 month exercise study, the survey results showed that all participants reported positive attitudes towards both supervised and unsupervised maintenance exercise programs, with the IG reporting greater benefits.Key Words: COPD, survey, maintenance exercise program     

Do oarsmen have asymmetries in the strength of their back and leg muscles?

The aim of this study was to establish whether asymmetry of the strength of the leg and trunk musculature is more prominent in rowers than in controls. Nineteen oarsmen and 20 male controls matched for age, height and body mass performed a series of isokinetic and isometric strength tests on an isokinetic dynamometer. These strength tests focused on the trunk and leg muscles. Comparisons of strength were made between and within groups for right and left symmetry patterns, hamstring :quadriceps ratios, and trunk flexor and extensor ratios. The results revealed no left and right asymmetries in either the knee extensor or flexor strength parameters (including both isometric and isokinetic measures). Knee extensor strength was significantly greater in the rowing population, but knee flexor strength was similar between the two groups. No difference was seen between the groups for the hamstring:quadriceps strength ratio. In the rowing population, stroke side had no influence on leg strength. No differences were observed in the isometric strength of the trunk flexors and extensors between groups, although EMG activity was significantly higher in the rowing population. Patterns of asymmetry of muscle activity were observed between the left and right erector spinae muscles during extension, which was significantly related to rowing side ( P < 0.01). These observations could be related to the high incidence of low back pain in oarsmen.     

The effects of high school math curriculum on college attendance: Evidence from the NLSY97

Using a sample of youth who graduated from high school in the late 1990s and early 2000s, this paper examines the impact of high school math curriculum on the decision to go to college. Results that control for unobserved differences between students and their families suggest that a more rigorous high school math curriculum is associated with a higher probability of attending college and of attending a 4-year college. The household fixed effect results imply that students who take an advanced academic math curriculum in high school (algebra II or precalculus, trigonometry, or calculus) are about 17 percentage points more likely to go to college and 20 percentage points more likely to start college at a 4-year school by age 21 compared to those students whose highest math class was algebra I or geometry.     

Violence against women students in the UK: time to take action

Sexual and gendered violence in the education sector is a worldwide concern, but in the UK it has been marginalised in research and policy. In this paper we present findings from the National Union of Students' study Hidden Marks, the first nationwide survey of women students' experiences of violence. This research established high levels of prevalence, with one in four respondents being subject to unwanted sexual behaviour during their studies. We analyse why the issue of violence against women students has remained low profile in this country, whereas in the USA, where victimisation rates are similar, it has had a high profile since the 1980s and interventions to tackle it have received a significant amount of federal support. We urge UK policymakers, universities, students' unions and academics to address the problem, and make suggestions about initial actions to take.     

Is peer review still the content industry's upper house?

Key points

• Although ‘peer review’ has quasi‐sacred status, times are changing, and peer review is not necessarily a single and uniformly reliable gold standard.
• For publishers, peer review is a process not an outcome.
• Academics understand peer review, but are often ignorant about the quality checking mechanisms within wider publishing.
• Self‐publishing has led to the much wider availability of publishing services – these now being used by all stakeholders in publishing.
• How should universities evaluate comment and ideas that were first disseminated within a non‐academic market?
• Rather than an upper house, is peer review today more of a galley kitchen?

     

Using Community Artifacts to Support Novice Math Teacher Educators in Teaching Prospective Teachers

Despite the centrality of math teacher educators (MTEs) in teacher education, we know little about the nature of professional learning opportunities for MTEs to develop and enhance the knowledge needed to teach prospective teachers. Existing models for supporting MTEs in developing their knowledge and practice do not address how to prepare novice MTEs in initially learning to teach prospective teachers. We present a professional learning model we have been pursuing for supporting novice MTEs and the generation of and role for community artifacts, namely lesson plans, in that model. We outline the process by which we implement, analyze, and collectively revise lesson plans so that they are continually improved over time to serve as artifacts that better instantiate what members of the local community are learning about how to support novice MTEs through identification of their problems of practice. Finally, we problematize the model we are investigating and propose implications of this model and questions raised by our work with the goal of inviting further discussion about supporting novice MTEs.

     

A blended approach to learning: added value and lessons learnt from students' use of computer-based materials for neurological analysis

This paper examines BSc Physiotherapy students’ experiences of developing their neurological observational and analytical skills using a blend of traditional classroom activities and computer‐based materials at the University of Birmingham. New teaching and learning resources were developed and supported in the School of Health Sciences using Web Course Tools combined with a wide range of video clips of patients with neurological disorders on CD‐ROM. These resources provided students with the opportunity to observe “real patients” prior to clinical placements, thus bridging the gap between their theoretical understanding of these disorders and their practical experience of evaluating abnormal movement in the clinical setting. This paper considers how this blended approach to learning enhanced students’ experiences of developing their neurological skills and of preparing for their clinical placements. This paper also discusses the lessons that have been gained from students’ experiences to provide future or similar projects with the opportunity to learn from these experiences.     

Explaining Constrains Causal Learning in Childhood

Three experiments investigate how self‐generated explanation influences children's causal learning. Five‐year‐olds (N = 114) observed data consistent with two hypotheses and were prompted to explain or to report each observation. In Study 1, when making novel generalizations, explainers were more likely to favor the hypothesis that accounted for more observations. In Study 2, explainers favored a hypothesis that was consistent with prior knowledge. Study 3 pitted a hypothesis that accounted for more observations against a hypothesis consistent with prior knowledge. Explainers were more likely to base generalizations on prior knowledge. Findings suggest that attempts to explain drive children to evaluate hypotheses using features of “good” explanations, or those supporting generalizations with broad scope, as informed by children's prior knowledge and observations.