title: General second-rank correlation tensors for homogeneous magnetohydrodynamic turbulence

authors: Oughton, Sean

subjects: turbulence

abstract: The properties and structure of second-order (Cartesian) correlation tensors are derived for the general case of two solenoidal random vector fields. The theory is intended to describe homogeneous magnetohydrodynamic turbulence, with no assumed rotational or reflectional symmetries. Each correlation tensor can be written in terms of four scalar generating functions and the relationship of these functions to the potentials that generate the poloidal and toroidal components of the underlying vector fields is derived. The physical nature of the scalar functions is investigated and their true or pseudoscalar character is ascertained. In our general discussion we clarify several misleading statements dating back to Robertson’s original paper in the field [Proc. Camb. Philos. Soc. 36, 209 (1940)]. It is also shown that using the one-dimensional correlation function, it is possible to obtain spectral information on the induced electric field in directions perpendicular to the measurement direction.

text: General second-rank correlation tensors for homogeneous magnetohydrodynamic turbulence The properties and structure of second-order (Cartesian) correlation tensors are derived for the general case of two solenoidal random vector fields. The theory is intended to describe homogeneous magnetohydrodynamic turbulence, with no assumed rotational or reflectional symmetries. Each correlation tensor can be written in terms of four scalar generating functions and the relationship of these functions to the potentials that generate the poloidal and toroidal components of the underlying vector fields is derived. The physical nature of the scalar functions is investigated and their true or pseudoscalar character is ascertained. In our general discussion we clarify several misleading statements dating back to Robertson’s original paper in the field [Proc. Camb. Philos. Soc. 36, 209 (1940)]. It is also shown that using the one-dimensional correlation function, it is possible to obtain spectral information on the induced electric field in directions perpendicular to the measurement direction.

year: 1997

title: Masters of craft: Old jobs in the new urban economy by Richard Ocejo [Book review]

authors: Piercy, Gemma Louise

abstract: This article reviews the book "Masters of craft: Old jobs in the new urban economy" by Richard Ocejo.

text: Masters of craft: Old jobs in the new urban economy by Richard Ocejo [Book review] This article reviews the book "Masters of craft: Old jobs in the new urban economy" by Richard Ocejo.

year: 2019

title: Maori Flourishing in a Fast Changing World - Inaugural Professorial Address

authors: Nikora, Linda Waimarie

subjects: Indigenous psychology; Maori flourishing; social identity; social and emotional wellbeing

abstract: A strong sense of who one is and that one’s life matters is vital to health and wellbeing. Without meaning and belonging many people, families and communities lie open to the risk of mental illness, addiction, transience, criminality, suicide and so on. In a rapidly changing social and technological environment where being Maori is enacted in the face of a dominant Pakeha majority, and in an increasingly diverse Maori world, staying well is an important challenge that we cannot underestimate or take for granted. There are many unwellness forces upon Maori in this fast changing world. Some are obvious and readily felt, others not so easy to apprehend or explain. Surveying almost 30 years of research, Professor Nikora will examine some of these unwellness forces and responses Maori make within the broader quest to remain indigenous and to flourish.

text: Maori Flourishing in a Fast Changing World - Inaugural Professorial Address A strong sense of who one is and that one’s life matters is vital to health and wellbeing. Without meaning and belonging many people, families and communities lie open to the risk of mental illness, addiction, transience, criminality, suicide and so on. In a rapidly changing social and technological environment where being Maori is enacted in the face of a dominant Pakeha majority, and in an increasingly diverse Maori world, staying well is an important challenge that we cannot underestimate or take for granted. There are many unwellness forces upon Maori in this fast changing world. Some are obvious and readily felt, others not so easy to apprehend or explain. Surveying almost 30 years of research, Professor Nikora will examine some of these unwellness forces and responses Maori make within the broader quest to remain indigenous and to flourish.

year: 2015-11-17