A validation of mobile sensing actigraphy devices for generating a biomechanical model of posture

Mobile sensing actigraphy was tested and validated as a modality for computing dynamic posturography. Twelve healthy volunteer subjects (6 male) were administered risperidone and assessed for postural stability using a NeuroCom® Balance Master system and BioSensics® mobile sensors at baseline, 2 hours, 6 hours, and 24 hours post-dose. A strong positive correlation was shown between BioSensics and Balance Master systems in a modified Sensory Organization Task, with Pearson’s r = 0.76, p < 0.001 on composite equilibrium scores. Strong to moderate correlations during the same task showed r = 0.48, p < 0.001 to r = 0.74, p < 0.001. Mobile sensing actigraphy may be a viable alternative to force plate posturography in assessing drug-induced postural instability

Soil stabilisation for DNA metabarcoding of plants and fungi. Implications for sampling at remote locations or via third-parties

Storage of soil samples prior to metagenomic analysis presents a problem. If field sites are remote or if samples are collected by third parties, transport to analytical laboratories may take several days or even weeks. The bulk of such samples and requirement for later homogenisation precludes the convenient use of a stabilisation buffer, so samples are usually cooled or frozen during transit. There has been limited testing of the most appropriate storage methods for later study of soil organisms by eDNA approaches. Here we tested a range of storage methods on two contrasting soils, comparing these methods to the control of freezing at -80 °C, followed by freeze-drying. To our knowledge, this is the first study to examine the effect of storage conditions on eukaryote DNA in soil, including both viable organisms (fungi) and DNA contained within dying/dead tissues (plants). For fungi, the best storage regimes (closest to the control) were storage at 4 °C (for up to 14 d) or active air-drying at room temperature. The worst treatments involved initial freezing, followed by thawing which led to significant later spoilage. The key spoilage organisms were identified as Metarhizium carneum and Mortierella spp., with a general increase in saprotrophic fungi and reduced abundances of mycorrhizal/biotrophic fungi. Plant data showed a similar pattern, but with greater variability in community structure, especially in the freeze-thaw treatments, probably due to stochastic variation in substrates for fungal decomposition, algal proliferation and some seed germination. In the absence of freeze drying facilities, samples should be shipped refrigerated, but not frozen if there is any risk of thawing

Emotion and relatedness as aspects of the identities of adolescents with severe learning disabilities: Contributions from ‘practice‐near’ social work research

This paper considers social and personal/individual approaches to researching identities of adolescents with severe learning disabilities; suggesting that vital components of emotionality and relatedness are largely missing from research and consequently from literature informing social care professionals. This leaves untapped, rich information and communication resources for research which may improve understandings of the experiences of a socially excluded group of young people. A psychosocial view of adolescent identity development, ‘subjectivation’, offers a way forward and a case study on ‘Billy’, drawn from a ‘practice‐near’ observational study, helps to illustrate this. Observation allows the researcher to be sensitive to the subtle ways in which identities of young people with severe learning disabilities are constructed, often with a sense of fragility and uncertainty. Continuities of experience between the young people and the rest of the adolescent community may be seen, but also the impact of living with impairment can be thought about in relation to the particular psychosocial circumstances of each young person. Knowledge of these processes enhances social work practice by encouraging workers to be sensitive to, and healthily curious about, the multiple ways in which identities of young people with severe learning disabilities are shaped in relationship with those around them and the wider social field

Emotion and relatedness as aspects of severely learning disabled adolescents’ identities: contributions from ‘practice-near’ social work research

This paper considers social and personal/individual approaches to researching severely learning disabled adolescents’ identities; suggesting that vital components of emotionality and relatedness are largely missing from research and consequently from literature informing social care professionals. This leaves untapped, rich information and communication resources for research which may improve understandings of the experiences of a socially excluded group of young people. A psychosocial view of adolescent identity development, ‘subjectivation’, offers a way forward and a case study on ‘Billy’, drawn from a ‘practice-near’ observational study, helps to illustrate this. Observation allows the researcher to be sensitive to the subtle ways in which severely learning disabled young people’s identities are constructed, often with a sense of fragility and uncertainty. Continuities of experience between the young people and the rest of the adolescent community may be seen, but also the impact of living with impairment can be thought about in relation to the particular psychosocial circumstances of each young person. Knowledge of these processes enhances social work practice by encouraging workers to be sensitive to, and healthily curious about, the multiple ways in which severely learning disabled young people’s identities are shaped in relationship with those around them and the wider social field

Deep seam and minesoil carbon sequestration potential of the South Wales Coalfield, UK

Combustion of coal for energy generation has been a significant contributor to increased concentrations of atmospheric carbon dioxide. It is of interest to evaluate the potential of former coalfields for mitigating these increases by carbon sequestration and to compare different options to achieving this end. Here, carbon sequestration in residual coal seams and through reclamation of spoil tips is compared, and their carbon dioxide storage potential in the South Wales Coalfield estimated. Coal seam sequestration estimates come from an established methodology and consider the total unmined coal resource below 500 m deep with potential for carbon sequestration. The most likely effective deep seam storage capacity is 104.9 Mt carbon dioxide, taking account of reservoir conditions and engineering factors. Whilst many spoil tips in South Wales have been reclaimed, the focus has not been on carbon sequestration potential. Estimates of minesoil restoration sequestration capacity were based on a survey of restored minesoil and vegetation carbon stocks, mainly on sites 20–30 years after restoration; data from this survey were then extrapolated to the coalfield as a whole. Minesoil storage is estimated at 1.5 or 2.5 Mt (+2.2 Mt in tree biomass) carbon dioxide based on average grassland or woodland measurements, respectively; modelled data predicted equilibrium values of 2.9 and 2.6 Mt carbon dioxide respectively in grassland or woodland minesoils. If all sites achieved close to the maximum capacity in their land use class, minesoil storage capacity would increase to 2.1 or 3.9 Mt carbon dioxide, respectively. Combining the best woodland minesoil and standing biomass values, sequestration capacity increases to 7.2 Mt carbon dioxide. The wider social, economic, environmental and regulatory constraints to achieving this sequestration for each approach are discussed. Coal seam sequestration has a much higher capacity but sequestration in mine sites is less costly and has fewer regulatory constraints. Findings indicate a significant combined potential for carbon sequestration in the South Wales Coalfield and highlight challenges in achieving this potential. On a global scale, ex-coalfield sequestration could contribute to broader efforts to mitigate emissions

Variation in Soil Fungal Composition Associated with the Invasion of Stellera chamaejasme L. in Qinghai–Tibet Plateau Grassland

Stellera chamaejasme L. is the most problematic weed in China&rsquo;s grasslands. Its root exudates affect co-occurring plants and thus may also affect soil fungi. Soils (0&ndash;20 cm depth) on two adjacent sites, one invaded the other uninvaded, were compared for a range of physiochemical parameters and by DNA sequencing of fungal communities. At the invaded site, relationships between S. chamaejasme abundance, soil physiochemical factors, and fungal communities were further investigated to determine whether these relationships corroborated conclusions on the basis of site differences that could be translated into functional variation. Results showed that the invaded soils had lower N, P, organic matter, fungal alpha diversity, and relative abundance of arbuscular mycorrhizal fungi (AMF), but greater abundance of pathogenic fungi. Organic matter and P were the edaphic factors most strongly linked to site differences in total fungal communities. Within the invaded site, organic matter rather than S. chamaejasme cover was closely linked to total fungal composition. However, on this site, a number of fungal species that had various ecological functions and that differentiated the two sites were related to S. chamaejasme cover. This study indicates that lower fertility soils may be more susceptible to invasion by S. chamaejasme. Although the influence of S. chamaejasme on total fungal community composition was limited, there was evidence of effects on particular fungal species. Further research is needed to determine whether these effects influence S. chamaejasme invasiveness