Lessons for Today and Tomorrow from Yesterday

Arnott, S.

doi:10.1382/s19990821

Cited by 2 publications

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“…Living the "Divided Life" Amid the Culture of Performance Teachers are not alone in their growing sense of frustration with the conditions of public schooling where the rhetoric of calling for raising standards is offered with declining funding for schools. A recent survey suggests that a growing number of Ontario school board trustees are refusing to run for office again, citing increased time pressures and school board amalgamation as factors that are making their jobs difficult (Arnott, 1999). With their roles devalued by increased provincial control, many trustees ask, "What is the point?…”

Section: The Global Culture Of Performance and The Alberta Contextmentioning

confidence: 99%

Teachers' Work in the Global Culture of Performance

Cheng,

Couture

2000

AJER

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Increasingly teachers find themselves working in the rarefied atmosphere of high-stakes testing. In Alberta, as in the rest of the industrialized world, the impulse to increase the monitoring and surveillance of student performance grows unabated. What are the impacts on teachers' work amid the growth of this culture of performance? Although internationally there are many debates around the issue of high-stakes testing, relatively little has been written about the lived experiences of teachers in this area. Drawing on a general review of the literature on teachers' classroom responses to high-stakes testing, this article argues that it is time to develop a framework for understanding the particular localized ways that teachers respond to the global culture of performance.

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Section: The Global Culture Of Performance and The Alberta Contextmentioning

confidence: 99%

Teachers' Work in the Global Culture of Performance

Cheng,

Couture

2000

AJER

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“…Diffraction studies of non-crystalline materials have had a rich history and have made profound contributions to our knowledge of the world around us (Arnott, 1999;Stubbs, 1999;Squire, 2000). The structures of silks, cellulose, rubber, collagen, DNA, -helices, oriented crystalline synthetic polymers, muscle, hair and so on, have all been determined by a variety of applications of fibre diffraction, and studies of mixed crystalline and amorphous phases have made a large impact in the understanding of, for example, the behaviour of materials manufactured from synthetic polymers.…”

Section: Introductionmentioning

confidence: 99%

The CCP13FibreFixprogram suite: semi-automated analysis of diffraction patterns from non-crystalline materials

et al. 2007

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The extraction of useful information from recorded diffraction patterns from non-crystalline materials is non-trivial and is not a well defined operation. Unlike protein crystallography where one expects to see well behaved diffraction spots in predictable positions defined by standard space groups, the diffraction patterns from non-crystalline materials are very diverse. They can range from uniaxially oriented fibre patterns which are completely sampled as Bragg peaks, but rotationally averaged around the fibre axis, to fibre patterns that are completely unsampled, to either kind of pattern with considerable axial misalignment (disorientation), to liquid-like order and even to mixtures of these various structure types. In the case of protein crystallography, the specimen is generated artificially and only used if the degree of order is sufficient to yield a three-dimensional density map of high enough resolution to be interpreted sensibly. However, with non-crystalline diffraction, many of the specimens of interest are naturally occurring (e.g. cellulose, rubber, collagen, muscle, hair, silk) and to elucidate their structure it is necessary to extract structural information from the materials as they actually are and to whatever resolution is available. Even when synthetic fibres are generated from purified components (e.g. nylon, polyethylene, DNA, polysaccharides, amyloids etc.) and diffraction occurs to high resolution, it is rarely possible to obtain perfect uniaxial alignment. The CCP13 project was established in the 1990s to generate software which will be generally useful for analysis of non-crystalline diffraction patterns. Various individual programs were written which allowed separate steps in the analysis procedure to be carried out. Many of these programs have now been integrated into a single user-friendly package known as FibreFix, which is freely downloadable from http://www.ccp13.ac.uk. Here the main features of FibreFix are outlined and some of its applications are illustrated.

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Lessons for Today and Tomorrow from Yesterday

Cited by 2 publications

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Teachers' Work in the Global Culture of Performance

Teachers' Work in the Global Culture of Performance

The CCP13FibreFixprogram suite: semi-automated analysis of diffraction patterns from non-crystalline materials

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