Description:
Objectives: To evaluate the current evidence regarding the quantification of cricket fast-bowling skill. Methods: Studies that assessed fast-bowling skill (bowling speed and accuracy) were identified from searches in SPORTDiscus (EBSCO) in June 2017. The reference lists of identified papers were also examined for relevant investigations. Results: A total of 16 papers matched the inclusion criteria, and discrepancies in assessment procedures were evident. Differences in test environment, pitch, and cricket ball characteristics; the warm-up prior to test; test familiarization procedures; permitted run-up lengths; bowling spell length; delivery sequence; test instructions; collection of bowling speed data; and collection and reportage of bowling accuracy data were apparent throughout the literature. The reliability and sensitivity of fast-bowling skill measures have rarely been reported across the literature. Only 1 study has attempted to assess the construct validity of its skill measures. Conclusions: There are several discrepancies in how fast-bowling skill has been assessed and subsequently quantified in the literature to date. This is a problem, because comparisons between studies are often difficult. Therefore, a strong rationale exists for the creation of match-specific standardized fast-bowling assessments that offer greater ecological validity while maintaining acceptable reliability and sensitivity of the skill measures. If prospective research can act on the proposed recommendations from this review, then coaches will be able to make more informed decisions surrounding player selection, talent identification, return to skill following injury, and the efficacy of short- and long-term training interventions for fast bowlers.
Description:
Reducing the capital cost of post combustion CO2 capture by eliminating flue gas desulfurisation (FGD) pre-treatment, requires management of the amines preferential SO2 absorption. Novel technologies such as CS-Cap restrict the impact of SO2 to only a small fraction of the amine inventory resulting in high sulfate burden amines. Traditional thermal reclamation of these spent absorbents has advantages regarding simplicity, but ranks poorly for industrial ecology around PCC. These amines require low energy regeneration technologies compatible with their physico-chemical properties that also maximise the potential for valorising by-products. This review summarises the sulfur chemistry and outlines several amine reclamation processes. It assesses the status of established and novel regeneration technologies for their applicability to high sulfur loaded amines. Should deep sulfur removal be required, a hybrid approach with initial bulk removal (as product) followed by a polishing step to further reduce sulfur is prospective. A preliminary estimation of the relative cost of using standard reclamation methods for treating Sulfur loaded CS-Cap absorbent revealed the cost would increase due to its higher sulfate burden despite comparable treatment volumes. Research gaps are identified which would enable better comparison between the costs of traditional FGD versus higher reclamation costs for combined capture technologies.
Description:
At law, all individuals are presumed to have the legal capacity to provide consent or refusal of treatment unless there are clinical indications of cognitive impairment. Once concerns are raised regarding the ability of an individual to provide valid consent for a surgical procedure, the use of a substitute decision-maker may be necessary. In this paper, we present an analysis of a clinical case study to illustrate the principles of valid consent. As part of the analysis, we discuss the issues relating to obtaining valid consent for an operative surgical procedure from an elderly client with obvious cognitive impairment. We also explore the role of a substitute decision-maker to obtain the requisite valid consent.
Description:
At law, all individuals are presumed to have the legal capacity to provide consent or refusal of treatment unless there are clinical indications of cognitive impairment. Once concerns are raised regarding the ability of an individual to provide valid consent for a surgical procedure, the use of a substitute decision-maker may be necessary. In this paper, we present an analysis of a clinical case study to illustrate the principles of valid consent. As part of the analysis, we discuss the issues relating to obtaining valid consent for an operative surgical procedure from an elderly client with obvious cognitive impairment. We also explore the role of a substitute decision-maker to obtain the requisite valid consent.
Description:
At law, adults are presumed to have legal competency to provide consent for or refusal to consent to health care treatments unless they have cognitive impairment. But what of the adolescent who is, at law, a child but who refuses to undergo elective surgical treatment? This paper discusses the issues surrounding the case of Keith, a 14-year-old boy with ulcerative colitis, who refuses consent to undergo an elective ileostomy.
Description:
At law, adults are presumed to have legal competency to provide consent for or refusal to consent to health care treatments unless they have cognitive impairment. But what of the adolescent who is, at law, a child but who refuses to undergo elective surgical treatment? This paper discusses the issues surrounding the case of Keith, a 14-year-old boy with ulcerative colitis, who refuses consent to undergo an elective ileostomy.
Description:
Purpose: To conduct a systematic review of randomized controlled trials to evaluate the evidence for the use of non-pharmacological depression therapies in older Chinese adults. Materials and methods: The population was individuals of Chinese extraction over the age of 60 who meet the criteria for depression. The review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA). Six healthcare databases were systematically searched for publications to the end date July 2018. Included study variables were extracted and methodological quality assessments were performed. Ten studies reported sufficient data for meta-analysis. Results: Fifteen experimental and quasi-experimental studies fulfilled the selection criteria (N = 904 participants). Twelve studies provided sufficient data to evaluate the therapies using Effect Size (ES) (Cohen'sd); ranged from low to high. In the Qigong studies ES varied d = 0.31–0.81, Reminiscence d = 0.20–2.37, and for single studies of Tai Chi d = 1.7 and for Life Story d = 1.46. From the meta-analyses, Qigong was the only treatment that had a significant effect on the severity of depression (Z =
Description:
Findings from efficacy studies have shown decreased in ACL injury rates in (predominantly female) athletes participating in prevention programs. Given the inherent higher ACL injury risk for females, the majority of intervention studies, have focused on female athletes. Subsequently, the content of exercises in ACL prevention programs is directed to target the modifiable ACL injury risk factors for female athletes. The literature is generally scarce regarding the efficacy of prevention programs to reduce ACL injuries in male athletes. In general, reduction of ACL injury rates seem to be limited to (young) female athletes and male athletes playing at low level of sports. Typically, ACL injury prevention programs entail a combination of plyometrics, strength training, agility and balance exercises. A problem is that improvements of movement patterns are not sustained over time. The reason may be related to the type of instructions given during training. Encouraging athletes to consciously control knee movements during exercises may not be optimal for the acquisition of complex motor skills. In the motor learning domain, these type of instructions are defined as an internal attentional focus. An internal focus, on one's own movements results in a more conscious type of control that may hamper motor learning. It has been established in numerous studies that an external focus of attention facilitates motor learning more effectively due to the utilization of automatic motor control. Subsequently, the athlete has more recourses available to anticipate on situations on the field and take appropriate feed forward directed actions. The purpose of this manuscript was to present methods to optimize motor skill acquisition of athletes and elaborate on athletes’ behavior.
Description:
Choking under pressure describes suboptimal sport performance in stressful situations, which has led to two fundamental ‘choking’ models: distraction and self-focus. The purpose of this review was to provide an overview of empirical studies that have tested interventions used to alleviate choking. The systematic review includes 47 empirical studies published up to April 2017, including experimental, quasi-experimental, and single-case studies with athletes. These studies encompassed a variety of interventions (n = 13) that were either distraction based or self-focus based. In addition, a third group–acclimatisation interventions–was identified. The results indicate that, in general, choking interventions based on both choking models and on acclimatisation provide a benefit to performance under pressure. The most reported effective interventions were pre-performance routines, quiet eye training, left-hand contractions, and acclimatisation training. The use of dual task was beneficial for performance under pressure but harmful when used in training. Mixed evidence was found for analogy learning, and null effects were reported for goal setting, neurofeedback training, and reappraisal cues. These results may help athletes and coaches select and implement effective strategies and methods to improve performance under pressure.
Description:
Choking under pressure describes suboptimal sport performance in stressful situations, which has led to two fundamental ‘choking’ models: distraction and self-focus. The purpose of this review was to provide an overview of empirical studies that have tested interventions used to alleviate choking. The systematic review includes 47 empirical studies published up to April 2017, including experimental, quasi-experimental, and single-case studies with athletes. These studies encompassed a variety of interventions (n = 13) that were either distraction based or self-focus based. In addition, a third group–acclimatisation interventions–was identified. The results indicate that, in general, choking interventions based on both choking models and on acclimatisation provide a benefit to performance under pressure. The most reported effective interventions were pre-performance routines, quiet eye training, left-hand contractions, and acclimatisation training. The use of dual task was beneficial for performance under pressure but harmful when used in training. Mixed evidence was found for analogy learning, and null effects were reported for goal setting, neurofeedback training, and reappraisal cues. These results may help athletes and coaches select and implement effective strategies and methods to improve performance under pressure.