Coal measure rocks and their properties

Coal measure rocks tend to have anisotropic and elastically non-linear behaviour. Understanding this is a key to understanding strata behaviour in coal mines. This paper discusses which properties matter and how they can be measured. Some new test methods are introduced. The paper also discusses the relevance of geophysics in determining these properties

Dealing with bursts – a new approach

This paper categorises the different types of coal bursts and gas outbursts in terms of their mechanisms. It is considered to be essentially impossible to predict when one of these events may occur. However, it is possible in many of the cases to predict the velocity of ejection and hence the distance with which particles may travel including bouncing and rolling and sliding. Keeping beyond this stand-off distance ensures the safety of workers from impact. Where gassy fault gouge exists there is no such safe distance. The material involved may be ejected in the form of a turbulent flow which has been described as a coal storm and which can travel great distances. This also involves large amounts of gas with the inherent problems of explosive mixtures. Locating, and determining the size of such geological features is therefore of great importance. Methods of doing this are discussed

Photosynthetic responses to climate warming differ among forest plant species in a temperate--subtropical forest ecotone

Temperatures in Florida are expected to increase ~5°C by 2100. North Florida will shift from a temperate/subtropical climate to a tropical climate within 30 years which could alter the forest composition and productivity. We conducted a field experiment using warming chambers to determine how warming impacts the physiological performance of four species in North Florida: Serenoa repens (saw palmetto), Andropogon glomeratus (bushy bluestem), Pinus palustris (longleaf pine), and Quercus laevis (turkey oak). Over one year we measured rates of leaf net photosynthesis (A) and stomatal conductance to water vapor (gs) on seedlings of each species under ambient and warmed treatments. We hypothesized climate warming effects on leaf physiology would vary among species and with changes in soil moisture. We predicted species with tropical distributions and adaptations to high temperatures (palmetto and C4 grass) would increase photosynthesis with warming compared to species with temperate distributions (oak and pine), and across species, reductions in soil moisture would diminish the positive effects of warming on photosynthesis. We found photosynthesis increased with warming in S. repens and A. glomeratus, did not change with warming in Q. laevis, and decreased with warming in P. palustris. Photosynthetic responses to warming did not vary with soil moisture in both S. repens and A. glomeratus. However, warming reduced photosynthesis in Q. laevis and P. palustris when soil moisture was low. These results suggest climate warming might benefit grasses and palmetto at the expense of native tree species, foreshadowing a shift in forest structure, composition, and productivity

Massive Science with VO and Grids

There is a growing need for massive computational resources for the analysis of new astronomical datasets. To tackle this problem, we present here our first steps towards marrying two new and emerging technologies; the Virtual Observatory (e.g, AstroGrid) and the computational grid (e.g. TeraGrid, COSMOS etc.). We discuss the construction of VOTechBroker, which is a modular software tool designed to abstract the tasks of submission and management of a large number of computational jobs to a distributed computer system. The broker will also interact with the AstroGrid workflow and MySpace environments. We discuss our planned usages of the VOTechBroker in computing a huge number of n-point correlation functions from the SDSS data and massive model-fitting of millions of CMBfast models to WMAP data. We also discuss other applications including the determination of the XMM Cluster Survey selection function and the construction of new WMAP maps.Comment: Invited talk at ADASSXV conference published as ASP Conference Series, Vol. XXX, 2005 C. Gabriel, C. Arviset, D. Ponz and E. Solano, eds. 9 page

Does growth in the outdoors stay in the outdoors? : the impact of an extended residential and outdoor learning experience on student motivation, engagement and 21st century capabilities

Introduction: Student motivation and engagement underpin educational success, and recent research has found they are lowest in middle high school, especially for boys. At the same time, education systems are recognizing that academic performance is necessary but not sufficient to prepare young people for the adult world, and so-called “21st Century skills” (communication, collaboration, critical thinking, and creativity) have been suggested as critical capabilities across all employment sectors in the future. The Glengarry program is a 6-month residential and outdoor learning experience for Year 9 (14–15 years old) boys at an Australian independent school, The Scots College (TSC) Glengarry. Intentionally located during the lowest point of engagement in their adolescent student journey, the Residential and Outdoor Education experience was hypothesized to boost their motivation and engagement and develop 21st Century skills. Methods: The Glengarry program involves students living in a boarding-style community for 20 weeks away from their families, participating in classes across all regular school subjects at a bush campus, and undertaking increasingly challenging outdoor education trips each week. The study aimed to measure how these factors transferred into students’ traditional school environment after their Glengarry experience. Year 9 was split into two cohorts who both participated in the study: one of which completed the Glengarry program in the first half of 2019, and the other during the second half of the year. Results: Self-reported quantitative and qualitative data supported the hypothesis that the Glengarry program did indeed, boost student motivation and 21st Century skills. While gains in 21st Century skills endured over the next 8–10 months, motivation and some engagement factors decreased upon return to the traditional school environment. Students described key factors in the Glengarry program which facilitated their development, including: an intense residential environment necessitating social growth, a closer connection with teachers in both school and community life, and an appreciation of learning in the natural environment. Recommendations are made for future research to strengthen these findings, and for how these mediating factors could be incorporated into the regular school environment

Rediscovering the potential of outdoor learning for developing 21st century competencies

In this century characterised by rapid change and unprecedented challenges, most education systems have acknowledged the importance of developing interpersonal and intrapersonal skills alongside technical knowledge. This chapter describes how two approaches to outdoor learning develop these 21st century competencies, through the lens of experiential education. Outdoor Adventure Education is an established pedagogical vehicle for developing psycho-social skills. Learning Outside the Classroom is a rising movement of teaching subject content while simultaneously promoting interpersonal, communication, teamwork, critical thinking, and conflict resolution skills, creativity and connection with nature. The chapter concludes with a discussion of the potential of outdoor environments to foster transformative competencies, and the inherent challenges for integration into regular school experiences

Statistical Computations with AstroGrid and the Grid

We outline our first steps towards marrying two new and emerging technologies; the Virtual Observatory (e.g, AstroGrid) and the computational grid. We discuss the construction of VOTechBroker, which is a modular software tool designed to abstract the tasks of submission and management of a large number of computational jobs to a distributed computer system. The broker will also interact with the AstroGrid workflow and MySpace environments. We present our planned usage of the VOTechBroker in computing a huge number of n-point correlation functions from the SDSS, as well as fitting over a million CMBfast models to the WMAP data.Comment: Invited talk to appear in "Proceedings of PHYSTAT05: Statistical Problems in Particle Physics, Astrophysics and Cosmology