491 research outputs found
Viewing Rural, Rurality, and Ruralities as Social Constructs: An Author Interview and Book Review of Teaching English in Rural Communities
No full textTeaching English in Rural Communities: Toward a Critical Rural English Pedagogy by Robert Petrone and Allison Wynhoff Olsen provides insights and practical strategies for teachers working in rural areas, where they often face unique challenges such as limited resources and cultural differences. This book provides a lens of criticality through the critiques and celebrations of rural living. This article opens with reviews of Critical Rural English Pedagogy and the chapters in the book. After the review, there are highlights of the exclusive interview with Petrone and Wynhoff Olsen as they relate their personal experiences and reflections on teaching in rural areas and stretch their pedagogy across education disciplines. Through the book review and author interview, this article sheds light on the importance of supporting and empowering educators in rural communities and highlights the key role of Critical Rural English Pedagogy in education
Fermion pair production at LEP2
No full textIn this article results from LEP at centre-of-mass energies from 130 GeV to 189 GeV given by the experiments ALEPH, DELPHI, L3 and OPAL are summarised. The measured cross sections and forward-backward asymmetries for lepton pair production and pair production of b and c quarks as well as the inclusive hadronic cross section are presented. These data are used to constrain the interference between photon and Z exchange in the S-matrix framework and to investigate the running of the electromagnetic coupling constant alpha . Furthermore limits on a hypothetical additional vector boson Z' and lower limits on deviations from the standard model in the Framework of contact interactions are given. (12 refs)
Not only the butterflies: managing ants on road verges to benefit Phengaris (Maculinea) butterflies
No full textObligate myrmecophilic butterfly species, such as Phengaris (Maculinea) teleius and P. nausithous, have narrow habitat requirements. Living as a caterpillar in the nests of the ant species Myrmica scabrinodis and M. rubra, respectively, they can only survive on sites with both host ants and the host plant Great Burnet Sanguisorba officinalis. After having been reintroduced into a nature reserve in the Netherlands in 1990, both butterfly species expanded their distribution to linear landscape elements such as road verges and ditch edges outside this reserve. As additional habitat of both butterfly species, vegetation management of these landscape elements became important. Our results show that a management beneficial for Phengaris butterflies should aim to increase the nest density of Myrmica species, at the same time reducing the density of nests of the competitor Lasius niger or at least keeping them at a low density. Unfavourable grassland management under which L. niger thrives, includes not mowing or flail-cutting the grass, or depositing dredgings along the side of the ditch. Management favourable for the two Myrmica species differs, demanding some flexibility if both species are to benefit. M. scabrinodis is best supported with early mowing of the road verge vegetation or late mowing in the nature reserve, both of which result in an open vegetation and warm microclimate. In contrast, the nest sites of M. rubra should be left undisturbed during the summer, and mown in late autumn. Mowing of butterfly habitat should be avoided between mid-June and mid-September as this would remove the flowerheads of the Sanguisorba plants, on which the butterflies lay their eggs
Measurement of Fermion pair production above the Y resonance with the L3 detector at LEP
No full textStandard Model Physics Results from LEP2
No full textAt LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search for contact interactions up to 20 TeV. The cross sections for single-W, ZZ and W+W- production agree well with the expectations. The branching fractions of the W boson into hadrons and leptons are determined as well as the CKM matrix element |V_{cs}|. Precise measurements of the W mass and width are presented yielding MW=80.427+-0.046 GeV and GammaW=2.12=_0.11 GeV. All electroweak data are very consistent with the Standard Model predictions. In a combined fit using the recent value of Delta alpha_{had}^(5)(s) the mass of the Higgs boson is constrained to MH=88^{+60}_{-37} GeV.At LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search for contact interactions up to 20 TeV. The cross sections for single-W, ZZ and W+W- production agree well with the expectations. The branching fractions of the W boson into hadrons and leptons are determined as well as the CKM matrix element |V_{cs}|. Precise measurements of the W mass and width are presented yielding MW=80.427+-0.046 GeV and GammaW=2.12=_0.11 GeV. All electroweak data are very consistent with the Standard Model predictions. In a combined fit using the recent value of Delta alpha_{had}^(5)(s) the mass of the Higgs boson is constrained to MH=88^{+60}_{-37} GeV
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