Mechanism of craquelure pattern formation on panel paintings

The drying shrinkage accumulation from exposure of freshly prepared gesso layers to relative humidity (RH) cycles was determined to elucidate the mechanism of craquelure pattern formation on panel paintings. The progresive drying shrinkage of the gesso is observed only under the cycles going to high RH levels which bring about transitions from brittle to ductile state of the material. The first incidence of fracture on the gesso layers occurred after a limited number of cycles ranging between a few and 100 for a range of layer thickness between 0.5 and 1?mm. The craquelure patterns stabilised also after a limited number of cycles (30 for the 1-mm thick layer). Upon increase in the gesso layer thickness, the strength of the layer is reduced and the spacing of shrinkage fractures increases. The study demonstrated that craquelure patterns, mimicking historical ones, can be realistically produced in laboratory conditions. Such studies would provide useful information for preparing specimens simulating historic panel paintings and would inform the current efforts on automatic, computer-aided classifications of crack formations on paintings.     

Parent and teacher views of gifted children's social abilities

This study compared parent and teacher perceptions of gifted children's social skills and the importance these adults attach to different social skills. No significant differences were found on overall ratings of social skills. However, differences were found on specific social skills. Teacher ratings of cooperation were significantly higher than parents' and teachers valued cooperation highly. Parent ratings of assertion were significantly higher than teachers' and they valued assertion and self‐control over cooperation. Implications for the classroom and home are discussed.     

Schools as learning communities: Building capacity through network learning

This article reports on the results from a study which investigated the impact of guidance given in writing tasks on children's writing performance. Six hundred eleven year olds completed writing tasks with varying content and structural support and their writing was analysed for purpose and organisation, style, spelling, clause structure, word class, paragraphing and punctuation. The aim was to find out if support facilitated better writing and if the type of support had differing effects. The findings suggested that the support did not significantly affect performance in narrative and persuasive writing. Possible implications and initial indications from a follow-up qualitative study of children's thinking are discussed.     

Disciplinary cultures in an Australian college of advanced education

Recently scholars have called for more detailed historical study of the teaching lives of academics across countries, systems and institutions. This article contributes to the research on the professoriate in its widest sense. The article focuses on the disciplinary perspectives and cultures of academic staff employed in one of Australia’s oldest colleges of advanced education during the period 1965–1982. It examines official beliefs, slogans, and truisms, which formed part of these perspectives. Disciplinary perspectives include the academics’ views of the subject, the important problems for the subject, and the criteria of utility of the subject. Australia’s Commonwealth Advisory Committee on Advanced Education saw colleges of advanced education compared to universities enrolling students with different interests, stressing part‐time studies, concentrating on applied courses rather than humanities, being closely attuned to the labour market and workforce needs and being principally teaching institutions. They were to be equal but different to universities, but came to be viewed as equal but cheaper. A crucial issue is the extent to which the disciplinary perspectives of college of advanced education academics matched those that the legislators envisaged.     

Putting objects of reference in context

ABSTRACT

The use of objects of reference as part of the development of communication‐has become established practice in the education of deafblind and multi‐sensory impaired children and young people. Unfortunately, there is comparatively little written material available for those who wish to develop this approach in their own practice with learners who have severe or profound and multiple difficulties. The result of this has been that many of the ‘second wave’ of interested practitioners have overemphasized the objects themselves with little or no appreciation of their use within a supporting context. The paper considers the philosophies and theories that underpin the methodological framework in deafblind education, and suggests how these could be applied to develop practice with a wider group of learners