title: Using cases for school principal performance standards: Australian and New Zealand experiences.

authors: Wildy, Helen

subjects: school principals

abstract: This article reports an international validation of a framework for performance standards for school principals. The framework, generated in Australia in 1996-1997, was applied in New Zealand in 2000. The framework involved an innovative method of establishing standards for principals' performance, based on a combination of qualitative and quantitative methods of making judgements about the quality of principals' work. Using cases of critical incidents in which principals made decisions in their everyday work, the essential elements of quality performance, together with a set of dimensions on which performance varied, were identified. This study explored the application of these essential elements and dimensions in a context in which similar school system restructuring is in progress. Three questions were addressed: How valid are the Australian cases in the New Zealand setting? How applicable to the New Zealand setting are the three continua—ditties, interpersonal skills, moral dispositions—that comprise the framework? And finally, How applicable to the New Zealand setting are the particular duties, interpersonal skills and moral dispositions? This study supports three conclusions. First, cases generated in one context are not applicable in a different cultural setting. However, the method of developing cases is readily applied cross culturally. Second, the values underpinning the framework developed in Australia are similar to, but not the same as, those about which principals in New Zealand assess principal performance. Third, there are similarities, but also important subtle differences, in the particular dimensions on which the framework is grounded. The study indicates the validity of using cases to generate performance standards for school principals.

text: Using cases for school principal performance standards: Australian and New Zealand experiences. This article reports an international validation of a framework for performance standards for school principals. The framework, generated in Australia in 1996-1997, was applied in New Zealand in 2000. The framework involved an innovative method of establishing standards for principals' performance, based on a combination of qualitative and quantitative methods of making judgements about the quality of principals' work. Using cases of critical incidents in which principals made decisions in their everyday work, the essential elements of quality performance, together with a set of dimensions on which performance varied, were identified. This study explored the application of these essential elements and dimensions in a context in which similar school system restructuring is in progress. Three questions were addressed: How valid are the Australian cases in the New Zealand setting? How applicable to the New Zealand setting are the three continua—ditties, interpersonal skills, moral dispositions—that comprise the framework? And finally, How applicable to the New Zealand setting are the particular duties, interpersonal skills and moral dispositions? This study supports three conclusions. First, cases generated in one context are not applicable in a different cultural setting. However, the method of developing cases is readily applied cross culturally. Second, the values underpinning the framework developed in Australia are similar to, but not the same as, those about which principals in New Zealand assess principal performance. Third, there are similarities, but also important subtle differences, in the particular dimensions on which the framework is grounded. The study indicates the validity of using cases to generate performance standards for school principals.

year: 2000

title: Computer graphics techniques for modeling page turning

authors: Liesaputra, Veronica

subjects: computer science

abstract: Turning the page is a mechanical part of the cognitive act of reading that we do literally unthinkingly. Interest in realistic book models for digital libraries and other online documents is growing. Yet, actually producing a computer graphics implementation for modeling page turning is a challenging undertaking. There are many possible foundations: two-dimensional models that use reflection and rotation; geometrical models using cylinders or cones; mass-spring models that simulate the mechanical properties of paper at varying degrees of fidelity; and finite-element models that directly compute the actual forces within a piece of paper. Even the simplest methods are not trivial, and the more sophisticated ones involve detailed physical and mathematical models. The variety, intricacy, and complexity of possible ways of simulating this fundamental act of reading is virtually unknown. This article surveys computer graphics models for page turning. It combines a tutorial introduction that covers the range of possibilities and complexities with a mathematical synopsis of each model in sufficient detail to serve as a basis for implementation. Illustrations are included, which are generated through our implementations of each model. The techniques presented include geometric methods (both two- and three-dimensional), mass-spring models with varying degrees of accuracy and complexity, and finite element models. We include a detailed comparison of experimentally determined computation time and subjective visual fidelity for all the methods discussed. The simpler techniques support convincing real-time implementations on ordinary workstations. We also address the question of whether such techniques are worthwhile in practice by describing results from a user study that compared the performance of a page turning book model with HTML and PDF presentations of the same material—and with physical books. This demonstrates that the book model has many advantages over conventional document formats.

text: Computer graphics techniques for modeling page turning Turning the page is a mechanical part of the cognitive act of reading that we do literally unthinkingly. Interest in realistic book models for digital libraries and other online documents is growing. Yet, actually producing a computer graphics implementation for modeling page turning is a challenging undertaking. There are many possible foundations: two-dimensional models that use reflection and rotation; geometrical models using cylinders or cones; mass-spring models that simulate the mechanical properties of paper at varying degrees of fidelity; and finite-element models that directly compute the actual forces within a piece of paper. Even the simplest methods are not trivial, and the more sophisticated ones involve detailed physical and mathematical models. The variety, intricacy, and complexity of possible ways of simulating this fundamental act of reading is virtually unknown. This article surveys computer graphics models for page turning. It combines a tutorial introduction that covers the range of possibilities and complexities with a mathematical synopsis of each model in sufficient detail to serve as a basis for implementation. Illustrations are included, which are generated through our implementations of each model. The techniques presented include geometric methods (both two- and three-dimensional), mass-spring models with varying degrees of accuracy and complexity, and finite element models. We include a detailed comparison of experimentally determined computation time and subjective visual fidelity for all the methods discussed. The simpler techniques support convincing real-time implementations on ordinary workstations. We also address the question of whether such techniques are worthwhile in practice by describing results from a user study that compared the performance of a page turning book model with HTML and PDF presentations of the same material—and with physical books. This demonstrates that the book model has many advantages over conventional document formats.

year: 2009

title: Waitangi Soda Springs alum dosing – Bioavailability of aluminium 2011-2020

authors: Ling, Nicholas

abstract: Continuous alum dosing of the Waitangi Soda Springs at Lake Rotoehu commenced in 2011 to reduce inflows of dissolved reactive phosphorus to Lake Rotoehu. Analyses of bioaccumulation in the tissues of kōura and goldfish from Lake Rotoehu were undertaken on animals collected annually since 2013 to determine the bioavailability and bioaccumulation of aluminium. Lake Rotoehu kōura and goldfish collected in 2013 showed slightly elevated aluminium concentrations in the gills indicating enhanced exposure to aluminium but little evidence for significant bioaccumulation in tissues. Concentrations in goldfish liver and gills were highest in 2016, but not significantly different to goldfish collected from Lake Rotorua in 2013 and flesh concentrations were low. Analyses of animals collected in 2020 confirm these earlier findings with no evidence of enhanced bioaccumulation of aluminium in Lake Rotoehu biota.

text: Waitangi Soda Springs alum dosing – Bioavailability of aluminium 2011-2020 Continuous alum dosing of the Waitangi Soda Springs at Lake Rotoehu commenced in 2011 to reduce inflows of dissolved reactive phosphorus to Lake Rotoehu. Analyses of bioaccumulation in the tissues of kōura and goldfish from Lake Rotoehu were undertaken on animals collected annually since 2013 to determine the bioavailability and bioaccumulation of aluminium. Lake Rotoehu kōura and goldfish collected in 2013 showed slightly elevated aluminium concentrations in the gills indicating enhanced exposure to aluminium but little evidence for significant bioaccumulation in tissues. Concentrations in goldfish liver and gills were highest in 2016, but not significantly different to goldfish collected from Lake Rotorua in 2013 and flesh concentrations were low. Analyses of animals collected in 2020 confirm these earlier findings with no evidence of enhanced bioaccumulation of aluminium in Lake Rotoehu biota.

year: 2021