A three dimensional vortex wake model for missiles at high angles on attack

A three dimensional model for the steady flow past missile and aircraft nose shaped bodies is presented based on augmenting a potential solution with a wake composed of vortex filaments. The vortex positions are determined by the requirement that they, in some sense, align with the flow. The aerodynamic loads on the body are compared with experimental values and used to evaluate the model. The vortex positions compare well with flow visualization results for slender bodies at high angles of attack. The approximations in the wake near the body cause peaks in the force distributions more severe than in the measured values. For given vortex strengths and body attachment points multiple steady vortex positions were not found

Contribution of LANDSAT-4 thematic mapper data to geologic exploration

The increased number of carefully selected narrow spectral bands and the increased spatial resolution of thematic mapper data over previously available satellite data contribute greatly to geologic exploration, both by providing spectral information that permits lithologic differentiation and recognition of alteration and spatial information that reveals structure. As vegetation and soil cover increase, the value of spectral components of TM data decreases relative to the value of the spatial component of the data. However, even in vegetated areas, the greater spectral breadth and discrimination of TM data permits improved recognition and mapping of spatial elements of the terrain. As our understanding of the spectral manifestations of the responses of soils and vegetation to unusual chemical environments increases, the value of spectral components of TM data to exploration will greatly improve in covered areas

Geologic exploration: The contribution of LANDSAT-4 thematic mapper data

The major advantages of the TM data over that of MSS systems are increased spatial resolution and a greater number of narrow, strategically placed spectral bands. The 30 meter pixel size permits finer definition of ground features and improves reliability of the photointerpretation of geologic structure. The value of the spatial data increases relative to the value of the spectral data as soil and vegetation cover increase. In arid areas with good exposure, it is possible with careful digital processing and some inventive color compositing to produce enough spectral differentiation of rock types and thereby produce facsimiles of standard geologic maps with a minimum of field work or reference to existing maps. Hue-saturation value images are compared with geological maps of Death Valley, California, the Big Horn/Wind River Basin of Wyoming, the area around Cement, Oklahoma, and Detroit. False color composites of the Ontario region are also examined

Using a Gridded Global Dataset to Characterize Regional Hydroclimate in Central Chile

Central Chile is facing dramatic projections of climate change, with a consensus for declining precipitation, negatively affecting hydropower generation and irrigated agriculture. Rising from sea level to 6000 m within a distance of 200 km, precipitation characterization is difficult because of a lack of long-term observations, especially at higher elevations. For understanding current mean and extreme conditions and recent hydroclimatological change, as well as to provide a baseline for downscaling climate model projections, a temporally and spatially complete dataset of daily meteorology is essential. The authors use a gridded global daily meteorological dataset at 0.25° resolution for the period 1948–2008, adjusted by monthly precipitation observations interpolated to the same grid using a cokriging method with elevation as a covariate. For validation, daily statistics of the adjusted gridded precipitation are compared to station observations. For further validation, a hydrology model is driven with the gridded 0.25° meteorology and streamflow statistics are compared with observed flow. The high elevation precipitation is validated by comparing the simulated snow extent to Moderate Resolution Imaging Spectroradiometer (MODIS) images. Results show that the daily meteorology with the adjusted precipitation can accurately capture the statistical properties of extreme events as well as the sequence of wet and dry events, with hydrological model results displaying reasonable agreement with observed streamflow and snow extent. This demonstrates the successful use of a global gridded data product in a relatively data-sparse region to capture hydroclimatological characteristics and extremes

The Integration of the Workable Range Model into a Mindfulness-Based Stress Reduction Course: a Practice-Based Case Study

Didactic teaching about stress is part of the Mindfulness-Based Stress Reduction (MBSR) curriculum. The content and methods of integrating conceptual teaching within the experiential pedagogy are rarely explored. Workable range is a model of stress and emotion regulation that illustrates patterns of physical, emotional and cognitive reactivity in relation to mindful presence. This is a qualitative case study of the inclusion of the workable range model into an MBSR course as a refinement of the didactic teaching about stress. The focus is to illuminate how the inclusion worked in practice. Ten staff, on a MBSR course in a higher educational setting, were recruited as participant researchers with an overlap between their own first-person investigation during the course and the research data. Adapted diagrams and written answers to two question schedules, completed as reflective exercises within the course, were analysed thematically using template analysis. This revealed how participant researchers engaged with and intuitively used the model to notice and describe their own patterns of feeling balanced or stressed and explore how they related to those experiences. How learning the model integrated with MBSR and the applicability of workable ranges as a teaching resource in MBSR is discussed. The study highlights questions about how conceptual and experiential teaching and learning interrelate in mindfulness-based interventions. There is scope for further research using mindfulness practice as a first-person methodology to investigate the processes within mindfulness-based programs

Exploring Buddhism as a ‘Tool’ to Support Well-Being: An Interpretative Phenomenological Analysis of Western Adopters’ Experiences

Buddhism is an ancient religion and philosophy of living that is practised worldwide. More recent interest in mindfulness as a practice and intervention in the West has highlighted Buddhist-derived concepts as useful in supporting health and well-being. As a result, the desire to understand Buddhism in its more complete form has strengthened. Although research into mindfulness and compassion is growing, there is a new interest in second-generation mindfulness, i.e. interventions that draw upon a more holistic use of Buddhist practices. To date, little research has explored this in Western contexts. For the current study, Nichiren Buddhists from the United Kingdom who had been practising for at least three years were recruited. Semi-structured interviews were conducted to explore their experience of this practice and how it informed their approach to daily life and, in particular, their health and well-being. Interpretive phenomenological analysis was employed as a method to understand the participants’ experiences. Three themes were generated using an inductive approach: (1) finding meaning—“All experiences have got so much value now”— which reflected the participants’ determination to seek purpose and value in all aspects of their life; (2) Buddhism as a needed ‘tool’—“I use it all the time”—which revealed their practice as an important method to help them manage their lives; and (3) agency—“I’m in control of my destiny”—which highlighted the participants’ engagement (supported by their Buddhist practice) in taking responsibility for their actions and responses. Findings indicate the need for future studies to further explore Buddhism as a mechanism for enhancing and sustaining well-being

Fluctuations for the Ginzburg-Landau ∇ϕ\nabla \phi Interface Model on a Bounded Domain

We study the massless field on $D_n = D \cap \tfrac{1}{n} \Z^2$, where $D \subseteq \R^2$ is a bounded domain with smooth boundary, with Hamiltonian \CH(h) = \sum_{x \sim y} \CV(h(x) - h(y)). The interaction \CV is assumed to be symmetric and uniformly convex. This is a general model for a $(2+1)$-dimensional effective interface where $h$ represents the height. We take our boundary conditions to be a continuous perturbation of a macroscopic tilt: $h(x) = n x \cdot u + f(x)$ for $x \in \partial D_n$, $u \in \R^2$, and $f \colon \R^2 \to \R$ continuous. We prove that the fluctuations of linear functionals of $h(x)$ about the tilt converge in the limit to a Gaussian free field on $D$, the standard Gaussian with respect to the weighted Dirichlet inner product $(f,g)_\nabla^\beta = \int_D \sum_i \beta_i \partial_i f_i \partial_i g_i$ for some explicit $\beta = \beta(u)$. In a subsequent article, we will employ the tools developed here to resolve a conjecture of Sheffield that the zero contour lines of $h$ are asymptotically described by $SLE(4)$, a conformally invariant random curve.Comment: 58 page

Athletes and Experimental Pain: A systematic review and meta-analysis

The evidence that athletes respond to and report indices of experimental pain differently to non-athlete populations was analysed. Databases screened were SPORTDiscus, PubMED, PsycArticles, the Cochrane Library (Cochrane Database of Systematic Reviews), Web of Science, Scopus and CINAHL. Studies that compared experimentally induced pain responses (threshold, tolerance, intensity, unpleasantness, bothersomeness and effect on performance) in athletes and controls were included. Meta-analyses were performed where appropriate and effects were described as standardised mean differences, pooled using random effects models. Thirty-six studies (2492 participants) met the inclusion criteria comprising 19 pain tolerance, 17 pain threshold, 21 pain intensity, five pain unpleasantness, two performance in pain and one bothersomeness study. Athletes demonstrated greater pain tolerance (g = .88 [95% confidence interval [CI] .65, .13]) and reported less pain intensity (g = −.80, [95% CI −1.13, −.47]) compared to controls; they also had higher pain threshold but with smaller effects (g = .41, [95% CI .08, .75]). Differences for unpleasantness did not reach statistical significance but the effects were large (g = −1.23 [95% CI −2.29, .18]). Two studies reported that performance in pain was better in contact athletes than non-athletes, and one concluded that athletes find pain less bothersome than controls. There were considerable inconsistencies in the methods employed that were reflected in the meta-analyses’ findings. Sub-group analyses of tolerance and intensity were conducted between endurance, contact, and other athlete groups, but were not significant. The data suggest that athletic participation is associated with altered pain responses, but mechanisms remain unclear and more transparent methods are recommended.This study was registered on the PROSPERO site in January 2019 (ref ID: CRD42019119611)

The Impact of Children’s Connection to Nature. A Report for the Royal Society of the Protection of Birds (RSPB)

Connecting with nature should be part of every child’s life as it has the potential to aid nature’s revival while benefiting the child. To embed nature connection within our social norms, there is a need to be able to understand the benefits and set targets for levels of nature connection. This report presents findings on the impact of connection to nature from a survey of 775 children, using the child as the unit of analysis, rather than aggregated data. The results demonstrated that children who were more connected to nature had significantly higher English attainment, although this wasn’t repeated for Mathematics. Further, the 1.5 Connection to Nature Index (CNI) level was found to be a significant threshold across other measures, with those children with a CNI of 1.5 or above having significantly higher health, life satisfaction, pro-environmental behaviours and pro-nature behaviours. The analysis found strong correlations between CNI and pro-nature behaviours and pro-environmental behavior. A positive correlation was also evident between CNI and days spent outdoors and days spent in nature over the past week, suggesting that the more time spent in nature is associated with child’s connection to nature. Finally, weak correlations were found between connection to nature, health and life satisfaction. When more refined attainment results for English were explored, (n = 512) further weak correlations were found between English attainment and attendance, English and life satisfaction, and between English attainment and connection to nature. There are a multitude of factors associated with a child’s English attainment, so, although the correlations are weak, it is noteworthy that connection to nature is as important to children’s achievement in English as life satisfaction and attendance at school