title: The third-order law for magnetohydrodynamic turbulence with constant shear

authors: Wan, Minping

subjects: magnetohydrodynamic (MHD) turbulence

abstract: The scaling laws of mixed third‐order structure functions for isotropic, homogeneous, and incompressible magnetohydrodynamic (MHD) turbulence have been recently applied in solar wind studies, even though there is recognition that isotropy is not well satisfied. Other studies have taken account of the anisotropy induced by a constant mean magnetic field. However, large‐scale shear can also cause departures from isotropy. Here we examine shear effects in the simplest case, and derive the third‐order laws for MHD turbulence with constant shear, where homogeneity is still assumed. This generalized scaling law has been checked by data from direct numerical simulations (DNS) of two‐dimensional (2D) MHD and is found to hold across the inertial range. These results suggest that third‐order structure function analysis and interpretation in the solar wind should be undertaken with some caution, since, when present, shear can change the meaning of the third‐order relations.

text: The third-order law for magnetohydrodynamic turbulence with constant shear The scaling laws of mixed third‐order structure functions for isotropic, homogeneous, and incompressible magnetohydrodynamic (MHD) turbulence have been recently applied in solar wind studies, even though there is recognition that isotropy is not well satisfied. Other studies have taken account of the anisotropy induced by a constant mean magnetic field. However, large‐scale shear can also cause departures from isotropy. Here we examine shear effects in the simplest case, and derive the third‐order laws for MHD turbulence with constant shear, where homogeneity is still assumed. This generalized scaling law has been checked by data from direct numerical simulations (DNS) of two‐dimensional (2D) MHD and is found to hold across the inertial range. These results suggest that third‐order structure function analysis and interpretation in the solar wind should be undertaken with some caution, since, when present, shear can change the meaning of the third‐order relations.

year: 2010

title: ‘Economics with training wheels’: Using blogs in teaching and assessing introductory economics

authors: Cameron, Michael Patrick

subjects: assessment

abstract: Blogs provide a dynamic interactive medium for online discussion, consistent with communal constructivist pedagogy. The author of this article describes and evaluates a blog assignment used in the teaching and assessment of a small (40-60 students) introductory economics course. Using qualitative and quantitative data collected across four semesters, students participation in the blog assignment is found to be associated with student ability, gender, and student perceptions of the blog. Importantly, students with past economics experience do not appear to crowd out novice economics students. Student performance is positively associated with the quality of their blog participation after controlling for student ability, suggesting that a focus on quality of student engagement could further improve learning outcomes. Students generally report overall positive experiences with the blog assignment.

text: ‘Economics with training wheels’: Using blogs in teaching and assessing introductory economics Blogs provide a dynamic interactive medium for online discussion, consistent with communal constructivist pedagogy. The author of this article describes and evaluates a blog assignment used in the teaching and assessment of a small (40-60 students) introductory economics course. Using qualitative and quantitative data collected across four semesters, students participation in the blog assignment is found to be associated with student ability, gender, and student perceptions of the blog. Importantly, students with past economics experience do not appear to crowd out novice economics students. Student performance is positively associated with the quality of their blog participation after controlling for student ability, suggesting that a focus on quality of student engagement could further improve learning outcomes. Students generally report overall positive experiences with the blog assignment.

year: 2012

title: Maori and epilepsy: Personal perceptions of the cause, treatment and consequences of epilepsy by Maori in the Bay of Plenty

authors: Simonsen, Kiri

subjects: Maori

abstract: This paper discusses the perceptions of epilepsy held by Maori in the Bay of Plenty. The paper
begins by introducing the purpose and rationale of the research. It then moves on to describe the
aims and qualitative research methods that were used to collect the data. Finally the paper
discusses the findings of the research, this includes: a close look at the unique perceptions of
epilepsy that were reported by Maori in the Bay of Plenty; the lack of resources and services
available in a small rural town of the Bay of Plenty; the services desired by Maori; attitudes
towards medication and the inappropriate behaviour many of the participants experienced by the
medical profession.

text: Maori and epilepsy: Personal perceptions of the cause, treatment and consequences of epilepsy by Maori in the Bay of Plenty This paper discusses the perceptions of epilepsy held by Maori in the Bay of Plenty. The paper
begins by introducing the purpose and rationale of the research. It then moves on to describe the
aims and qualitative research methods that were used to collect the data. Finally the paper
discusses the findings of the research, this includes: a close look at the unique perceptions of
epilepsy that were reported by Maori in the Bay of Plenty; the lack of resources and services
available in a small rural town of the Bay of Plenty; the services desired by Maori; attitudes
towards medication and the inappropriate behaviour many of the participants experienced by the
medical profession.

year: 1999