Post processing of the hot torsion test results using a multi-dimensional modelling approach

A model selection scheme was extended to a multi-dimensional representation of the hot torsion test torque, twist and twist rate data to calculate partial derivatives of the torque data with respect to twist and twist rate. These enabled calculation of the instantaneous strain and strain rate hardening indices in the Fields and Backofen method. The concept of an iso-parametric shape function has been borrowed from the finite element method for adding twist rate as a dependant variable to the torque-twist models identified by the model selection scheme. Expressions to calculate the hardening indices, when employing a rational model of torsion data, were derived and presented. Subsequently, the models were used for post processing the data and determining hot strength behaviour, taking into account variations of strain and strain rate hardening indices during the deformation. To substantiate the technique, the hot flow behaviour of API-X70 micro-alloyed steel was determined using a range of hot torsion test data for the material. The flow stress obtained using the instantaneous hardening indices were compared with that obtained by the orthodox technique. For the investigated cases, the onset of dynamic recrystallization (DRX) predicted by the presented technique deviated considerably from those obtained when the average indices were used.

The identification of implicit theories in domestic violence perpetrators

An understanding of how the beliefs of domestically violent offenders might influence their abusive behavior is central to the development and delivery of any intervention program that aims to reduce the risk of further violence against women and children. This article reports the results of a preliminary investigation into the core beliefs of a sample of domestically violent men. Three major themes emerged from an analysis of the accounts of their violence, which were understood in relation to three implicit theories that participants held about themselves, their relationships, and the world. These are discussed in terms of previous studies of offender cognition, how domestic violence programs might be conceptualized, and their implications for practice.

Nutrition promotion : theories and methods, systems and settings

An introduction to approaches and techniques used to influence food behaviours and improve nutrition and health.

Giuseppe Pagano: a rationalist caught between theories & practices of fascist Italy

The architecture of a modern building is viewed and defined as a whole: the so-called decorative detail does not exist, only the intelligent and strictly controlled technical detail. The aesthetic basis—both social and technical at the same time—of modern architecture is reproduced in the three-dimensional composition.

Beyond caricature : exploring theories of educational policy production and implementation

Since the mid 1980s there has been a growing interest amongst sociologists in the study of education policy, which has coincided with a decline within the tradition of educational administration - having been subsumed by educational management - of 'detailed historical work, or work concerned primarily with politics or policy content' (Olga 1987. p. 138). While in the past other traditions associated with social policy and social administration, government and politics. and the history of education have also been concerned with education policy. most recent and substantive work (for example. Olga 1987 1990. Dale 1989, 1992, Dale & Olga 1991, 1993. Ball 1990, 1993, Bowe, et al. 1992. Lingard 1991,1993)has come "from within the sociology of education. especially from those working within, or influenced by, the 'new' sociology of education, and, especially, those of a Marxist or neo-Marxist persuasion or at least concerned with the relationship of the state to education as a central problem (Olga 1987. p.139)".

Molecular alignment in nematic liquid crystals : a comparison between the results of experiments at high pressure and predictions based on mean field theories

The effects of high pressure on molecular arrangment in liquid crystals were observed by optical measurements on two nematogens. It was possible to deduce how volume varies as a factor of temperature and pressure and how nematic order parameter changes under the influence of high pressure.