Induction in arbitrarily shaped oceans VI, oceans of variable depth

We present calculations of t he electric currents induced in a model ocean by the 24 hr Sq variation. The model has realistic bathymetry and represents a further step of a consistent approach to oceanic induction in which we have introduced various complexities in order of priority. The solution obtained is compared with our previously published results for the case of an ocean of realistic shape and uniform depth. It is found that the major shelf-seas considerably modify the pattern of elect ric current circu­ lation in the oceans of the southern hemisphere. The consistent nature of the method of matched outer and inner expansions which we have used is also discussed. It seems probable that other methods, not limited to finding an outer solution and consequently more complicated, will at best only produce an outer solution since, in practice, the relatively coarse mesh necessarily used in the computation of realistic global problems precludes a fine resolution of the coastal bathymetry. Finally , the meaning of the internal and external Legendre coefficients and their relationship to Sq over the oceans is briefly discussed

Induction in arbitrarily shaped oceans. V, the circulation of Sq-induced currents around land masses

The model ocean used in previous papers in this series is refined to allow for five separate land masses. The ocean is taken to be of uniform depth, and insulated from the mantle which is modelled by an infinitely conducting core at uniform depth. The fast method of solution introduced in Paper IV enables the electric currents induced by Sq to be calculated on a 2° x 2° global mesh. The 'outer' solution away from the coast is calculated. The 'inner' solution will be a coastal correction different for every coastal configuration. The current is allowed to circulate round isolated land masses, giving markedly different patterns from those in Paper IV. For some harmonics it appears necessary to differentiate even between Australia and New Zealand, although the world-wide effect of the remote island of Spitz­ bergen is minimal. Current distributions are shown for periods of 6, 8, 12 and 24 hr, and a value is set on the current streaming between the various land masses for all the Legendre harmonics considered

Induction in arbitrarily shaped oceans. IV, sq for a simple case

World curves are presented of electric currents induced in electrically insulated oceans by Sq using a perfectly conducting sphere to simulate the underlying mantle. The curves are valid everywhere away from those coastal regions at which the sea bed rises steeply. In such cases an edge correction may be needed. The numerical computations are for periods of 6, 8, 12 and 24 hr and comparison is made with results obtained by others for a 24-hr period. Circulation conditions around the island are ignored in this note

Implementing and evaluating an alternative model for training field work educators

In conjunction with academic social work educators, fieldwork supervisors are significant and influential instructors of emerging social work practitioners. This partnership is typically enhanced by universities offering training for fieldwork supervisors to assist and support them in their important roles. This can be challenging however in flexibly delivered programs where supervisors may be located in areas distant from the universities with which students are affiliated. Further, within the current human services context particularly in rural areas, fieldwork education is becoming increasingly subject to a range of organisational and policy imperatives that have the potential to limit the capacity of fieldwork supervisors to proactively engage with social work education This paper describes a pilot project developed and evaluated in Central Queensland Australia which aimed to address some of these challenges. A multi-facetted approach to training, mentoring and supporting fieldwork supervisors of social work students on practicum was developed and implemented across diverse organisational and geographical contexts. Findings of the evaluation and implications for fieldwork education are presented

Predicting police behavior: Ecology, class, and autonomy

Social ecological theories of crime have recently been extended to explain spatial variation in police behavior. Although these theories successfully identify community characteristics affecting local policing, they fail to acknowledge the class-based origins of formal social control and the relative autonomy of the police. This paper addresses the neglected class issue by integrating social ecological and critical theories in a model of police behavior. Cross-sectional data was obtained from twenty-five police agencies\u27 vice divisions and their corresponding jurisdictions to test the integrated hypothesis. Four social ecological variables and a fiscal measure of relative autonomy are examined as police behavior predictors. Findings reveal that both the autonomy measure and three of the social ecological variables explain significant variance in police behavior, thus supporting the inclusion of structural Marxism in a general theory of police behavior