74,373 research outputs found
Becoming eco-responsible, active citizens through participation in the Eco Ambassadors project - a reflective analysis
This article offers a reflective analysis of the Eco Ambassadors Project as an example of the some of the ways in which learning about environmental issues and active citizenship can be encouraged and enabled through collaboration and negotiated participation. Some policy background to the project is given, followed by a critical consideration of the theoretical framework of situated learning and participation in a community of practice in relation to the project alongside theories of citizenship. Three activities undertaken during the project are highlighted and these are critically examined in relation to the theories under consideration. The paper argues that the theoretical framework of learning by participation can usefully augment and help better explain how learners develop their identities as citizens, and that through participation people can become active members of communities that are environmentally and politically aware
Lunar construction research
Research on lunar base design and constructio
Singlet baryons in the graded symmetry approach to partially quenched QCD
Progress in the calculation of the electromagnetic properties of baryon
excitations in lattice QCD is presenting new challenges in the determination of
sea-quark loop contributions to matrix elements. A reliable estimation of the
sea-quark loop contributions presents a pressing issue in the accurate
comparison of lattice QCD results with experiment. In this article, an
extension of the graded symmetry approach to partially quenched QCD is
presented, which builds on previous theory by explicitly including
flavor-singlet baryons in its construction. The formalism takes into account
the interactions among both octet and singlet baryons, octet mesons, and their
ghost counterparts; the latter enables the isolation of the quark-flow
disconnected sea-quark loop contributions. The introduction of the
flavor-singlet states anticipates the application of the method to baryon
excitations such as the lowest-lying odd-parity Lambda baryon, the
Lambda(1405), which is considered in detail as a worked example.Comment: arXiv copy updated to published version: Phys. Rev. D 94, 094004
(2016
Active control transport design criteria
Vehicle design considerations for active control applications to subsonic transports are examined. Active control is defined along with those functions which are considered in the study of design criteria. The FAA regulations governing transport aircraft design are briefly discussed
A Bohmian approach to quantum fractals
A quantum fractal is a wavefunction with a real and an imaginary part
continuous everywhere, but differentiable nowhere. This lack of
differentiability has been used as an argument to deny the general validity of
Bohmian mechanics (and other trajectory--based approaches) in providing a
complete interpretation of quantum mechanics. Here, this assertion is overcome
by means of a formal extension of Bohmian mechanics based on a limiting
approach. Within this novel formulation, the particle dynamics is always
satisfactorily described by a well defined equation of motion. In particular,
in the case of guidance under quantum fractals, the corresponding trajectories
will also be fractal.Comment: 19 pages, 3 figures (revised version
Pupil participation in Scottish schools: final report
This research was commissioned by Learning and Teaching Scotland (LTS) to evaluate the nature of pupil participation in primary and secondary schools across Scotland. The specific objectives of the research were:
<p>· To describe what school staff and pupils understand by the term âpupil participationâ.</p>
<p>· To describe the range and usage of pupil participation mechanisms employed in schools.</p>
<p>· To describe how school staff respect and respond to pupilsâ views and ideas, and those of the wider community.</p>
<p>· To identify the characteristics of schools and classrooms that facilitate effective pupil participation.</p>
<p>· To identify possible barriers to the development of pupil participation in schools and to make suggestions about how these can be overcome.</p>
<p>· To capture examples of effective practice of pupil participation.</p>
<p>· To make suggestions about how pupil participation can help support the implementation of the Curriculum for Excellence.</p>
Simulation of ideal-gas flow by nitrogen and other selected gases at cryogenic temperatures
The real gas behavior of nitrogen, the gas normally used in transonic cryogenic tunnels, is reported for the following flow processes: isentropic expansion, normal shocks, boundary layers, and interactions between shock waves and boundary layers. The only difference in predicted pressure ratio between nitrogen and an ideal gas which may limit the minimum operating temperature of transonic cryogenic wind tunnels occur at total pressures approaching 9 atm and total temperatures 10 K below the corresponding saturation temperature. These pressure differences approach 1 percent for both isentropic expansions and normal shocks. Alternative cryogenic test gases were also analyzed. Differences between air and an ideal diatomic gas are similar in magnitude to those for nitrogen and should present no difficulty. However, differences for helium and hydrogen are over an order of magnitude greater than those for nitrogen or air. It is concluded that helium and cryogenic hydrogen would not approximate the compressible flow of an ideal diatomic gas
Pupil participation in Scottish schools: how far have we come?
The United Nations Convention on the Rights of the Child (UN, 1989), which applies to all children under the age of 18, established the overarching principles guiding pupil participation. In most European states, signatories to the Convention have enacted policies to promote the voice of the child or young person in decisions that affect them. In education systems strategies to enhance the pupil participation are an increasing feature of deliberation on education for citizenship, curriculum flexibility, pedagogical approaches and assessment for learning. Despite the positive policy context and professional commitment to principles of inclusion, translating policy intentions so that the spirit of the legislation is played out in the day-to-day experiences of pupils is a constant challenge. This article reports on research that examines how pupil participation is understood and enacted in Scottish schools. It considers how the over-laying of diverse policies presents mixed messages to practitioners
Chiral effective field theory beyond the power-counting regime
Novel techniques are presented, which identify the chiral power-counting
regime (PCR), and realize the existence of an intrinsic energy scale embedded
in lattice QCD results that extend outside the PCR. The nucleon mass is
considered as a benchmark for illustrating this new approach. Using
finite-range regularization, an optimal regularization scale can be extracted
from lattice simulation results by analyzing the renormalization of the low
energy coefficients. The optimal scale allows a description of lattice
simulation results that extend beyond the PCR by quantifying and thus handling
any scheme-dependence. Preliminary results for the nucleon magnetic moment are
also examined, and a consistent optimal regularization scale is obtained. This
indicates the existence of an intrinsic scale corresponding to the finite size
of the source of the pion cloud.Comment: 6 pages, 4 figures, conferenc
Chiral extrapolations for nucleon magnetic moments
Lattice QCD simulations have made significant progress in the calculation of
nucleon electromagnetic form factors in the chiral regime in recent years. With
simulation results achieving pion masses of order ~180 MeV, there is an
apparent challenge as to how the physical regime is approached. By using
contemporary methods in chiral effective field theory, both the quark-mass and
finite-volume dependence of the isovector nucleon magnetic moment are carefully
examined. The extrapolation to the physical point yields a result that is
compatible with experiment, albeit with a combined statistical and systematic
uncertainty of 10%. The extrapolation shows a strong finite-volume dependence;
lattice sizes of L > 5 fm must be used to simulate results within 2% of the
infinite-volume result for the magnetic moment at the physical pion mass.Comment: 7 pages, 12 figures, 1 tabl
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