Reliability of Isometric Knee Extensor Strength and Evoked Outcomes in Boys and Men

Volitional and evoked strength are outcomes often used in both adults and children. However, the reliability of these measurements is sparse. Emerging reliability studies utilize a robust analysis, which includes “consistency” of scores and “stability” of group means. This study aimed to assess the reliability of volitional and evoked muscle strength outcomes of the knee extensors in boys and men. Twelve boys and twelve men participated in the study. Participants completed ten maximal isometric knee extensions (MVCs) on three separate days. On days two and three, quadriceps muscle belly stimulation was introduced in the 6th-10th MVC. The stability of group means was determined through a repeated measures Analysis of Variance (ANOVA) model, while consistency was determined through a fully nested ANOVA model. High reliability was observed in both, men and boys in volitional torque production, as reflected by the ICCs (Men R = 0.97 and 0.98, boys R = 0.91 and 0.92) and true score variance. The group means were stable in both, men and boys, especially in 1st-5th MVC. Twitch amplitudes were stable across days and demonstrated good reliability, as reflected by high ICCs (Pre-MVC twitch: men R = 0.78 and 0.83, boys R = 0.98 and 0.99; post-MVC twitch: men R = 0.84 and 0.85, boys R= 0.98 and 0.99), and true score variance. PAP demonstrated acceptable reliability in both boys and men, although it was lower compared to the other outcomes. PAP in the 1st-5th MVCs in men showed low reliability, while PAP in the 6th-10th MVCs showed high reliability in men and boys, as reflected by the high true score variance, ICC, and stable means. The results support using volitional torque and evoked outcomes in adults and children. Future research could examine the reliability of other evoked variables and different volitional exercise protocols

The use of a silicone-based biomembrane for microaerobic H2S removal from biogas

A lab-scale bio-membrane unit was developed to improve H2S removal from biogas through microaeration. Biomembrane separated biogas from air and consisted of a silicone tube covered by microaerobic biofilm. This setup allowed efficient H2S removal while minimizing biogas contamination with oxygen and nitrogen. The transport and removal of H2S, N-2, O-2, CH4 and CO2 through bare membrane, wet membrane and biomembrane was investigated. Membrane allowed the transfer of gases through it as long as there was enough driving force to induce it. H2S concentration in biogas decreased much faster with the biomembrane. The permeation of gases through the membranes decreased in order: H2S > CO2 > CH4 > O-2 > N-2. H2S removal efficiency of more than 99% was observed during the continuous experiment. Light yellow deposits on the membrane indicated the possible elemental sulfur formation due to biological oxidation of H2S. Thiobacillus thioparus was detected by FISH and PCR-DGGE

Linking Art through Human Poses

We address the discovery of composition transfer in artworks based on their visual content. Automated analysis of large art collections, which are growing as a result of art digitization among museums and galleries, is an important tool for art history and assists cultural heritage preservation. Modern image retrieval systems offer good performance on visually similar artworks, but fail in the cases of more abstract composition transfer. The proposed approach links artworks through a pose similarity of human figures depicted in images. Human figures are the subject of a large fraction of visual art from middle ages to modernity and their distinctive poses were often a source of inspiration among artists. The method consists of two steps -- fast pose matching and robust spatial verification. We experimentally show that explicit human pose matching is superior to standard content-based image retrieval methods on a manually annotated art composition transfer dataset

Cognitive debiasing 1: Origins of bias and theory of debiasing

Numerous studies have shown that diagnostic failure depends upon a variety of factors. Psychological factors are fundamental in influencing the cognitive performance of the decision maker. In this first of two papers, we discuss the basics of reasoning and the Dual Process Theory (DPT) of decision making. The general properties of the DPT model, as it applies to diagnostic reasoning, are reviewed. A variety of cognitive and affective biases are known to compromise the decision-making process. They mostly appear to originate in the fast intuitive processes of Type 1 that dominate (or drive) decision making. Type 1 processes work well most of the time but they may open the door for biases. Removing or at least mitigating these biases would appear to be an important goal. We will also review the origins of biases. The consensus is that there are two major sources: innate, hard-wired biases that developed in our evolutionary past, and acquired biases established in the course of development and within our working environments. Both are associated with abbreviated decision making in the form of heuristics. Other work suggests that ambient and contextual factors may create high risk situations that dispose decision makers to particular biases. Fatigue, sleep deprivation and cognitive overload appear to be important determinants. The theoretical basis of several approaches towards debiasing is then discussed. All share a common feature that involves a deliberate decoupling from Type 1 intuitive processing and moving to Type 2 analytical processing so that eventually unexamined intuitive judgments can be submitted to verification. This decoupling step appears to be the critical feature of cognitive and affective debiasing

‘We don't have recipes; we just have loads of ingredients’: explanations of evidence and clinical decision making by speech and language therapists

Rationale, aims and objectives: Research findings consistently suggest that speech and language therapists (SLTs) are failing to draw effectively on research-based evidence to guide clinical practice. This study aimed to examine what constitutes the reasoning provided by SLTs for treatment choices and whether science plays a part in those decisions. Method: This study, based in Ireland, reports on the qualitative phase of a mixed-methods study, which examined attitudes underpinning treatment choices and the therapy process. SLTs were recruited from community, hospital and disability work settings via SLT managers who acted as gatekeepers. A total of three focus groups were run. Data were transcribed, anonymized and analysed using thematic analysis. Results: In total, 48 participants took part in the focus groups. The majority of participants were female, represented senior grades and had basic professional qualifications. Three key themes were identified: practice imperfect; practice as grounded and growing; and critical practice. Findings show that treatment decisions are scaffolded primarily on practice evidence. The uniqueness of each patient results in dynamic and pragmatic practice, constraining the application of unmodified therapies. Conclusion: The findings emerging from the data reflect the complexities and paradoxes of clinical practice as described by SLTs. Practice is pivoted on both the patient and clinician, through their membership of groups and as individuals. Scientific thinking is a component of decision making; a tool with which to approach the various ingredients and the dynamic nature of clinical practice. However, these scientific elements do not necessarily reflect evidence-based practice as typically constructed