Enzymatic decolorization of bacterial pigments from culturally significant marble

Marble monuments and facades are susceptible to microbial colonization. Microbial growth on a marble surface can develop into unsightly red stains whose removal has proven problematic. The purpose of this study was to determine if the red-brown stains on Isamu Noguchi's marble sculpture Slide Mantra (1991) could be caused by pigment-producing microorganisms and to assess the potential of enzymatic stain remediation. Traditional cell culture methods were used to isolate a pigmented bacterium from a stained area of the sculpture. Sequencing and analysis of the 16S rRNA gene identified the organism as a strain of Serratia marcescens, and FT-IR spectroscopy demonstrated that the pigment produced by the bacteria was most likely a prodigiosin. Decolorization of the pigment in solution demonstrated that the enzyme laccase from the fungus Trametes versicolor has potential as a decolorizing agent. This study suggests that enzymatic decolorization may be applicable to stains on culturally significant marble caused by microbial colonization.     

Teaching conversation skills to behaviorally disordered children

The purpose of this study was to test the effectiveness of an instructional package designed to teach conversation skills to behaviorally disordered children. A multiple baseline design with a reversal was employed to assess the effectiveness of this package. Six children were taught in two groups of three. The teachers were taught to use the package prior to implementation to insure standardization across both groups. Data were collected in a contrived setting with a peer trained as a conversant. Observation also took place in the school cafeteria to assess generalization of the training to a naturalistic setting. Social validation data were collected from teachers and children to evaluate their impressions of the instructional package. Results indicated that the instructional package was effective in increasing conversational skills above baseline levels in all children and in both settings.     

Analyzing repeat consumption of identical cultural goods: some exploratory evidence from moviegoing

This study offers a preliminary exploration of repeat consumption of identical cultural goods, specifically moviegoing. The term ‘identical’ in this study refers to cases where, for example, individuals view the same film at a movie theater, in a short time interval, on more than one occasion i.e. experiencing the cultural good in precisely the same format. It is not meant to embrace the case of individuals who, for example, view a particular film at a movie theater and then see it some time later in another format, such as via a DVD player. The repeat viewing phenomenon is discussed and then considered empirically. Films aimed predominantly at children attract the highest number of repeat views, while those aimed at an older audience attract significantly fewer repeat views. The profile of repeat viewers of the 10 films which attracted the greatest number of repeat viewers was subject to more detailed scrutiny. In general, repeat viewers tend to be younger but the gender balance differs markedly according to film content. An earlier version of this article was presented at the 3rd European Workshop on Applied Cultural Economics, University of Oviedo in Aviles, Spain 14–16 June 2007 and the 9th International Conference on Arts and Cultural Management (AIMAC), Fundación Universidad Empresa (ADEIT), Valencia, Spain 8–11 July 2007. We are grateful for comments received and the usual caveat applies.     

The contested place of religion in the Australian Civics and Citizenship curriculum: exploring the secular in a multi-faith society

In the absence of a dedicated subject for teaching general religious education, the inclusion of Civics and Citizenship education as a new subject within the first Federal Australian Curriculum provides an important opportunity for teaching the religious within Australian schools. The curriculum for Civics and Citizenship requires students to learn that Australia is both a secular nation and a multi-faith society, and to understand religions practised in contemporary Australia. The term ‘secular’ and the need for students to learn about Australia’s contemporary multi-faith society raise some significant issues for schools and teachers looking to implement Civics and Citizenship. Focusing on public (state-controlled) schools, the argument here draws on recent analysis within the Australian context to suggest that religion remains an important factor in understanding and shaping democratic citizenship in Australia, that this should be acknowledged within public schools, and that a constructivist, dialogical-based pedagogy provides possibilities for recognising the religious within Civics and Citizenship education.     

Identifying didactic knowledge: An empirical study of the educationally critical aspects of learning about information systems

This paper backgrounds and illustrates an approach to researching didactic knowledge. Underlying the approach are some of the frameworks developed from the student learning research. Based on these frameworks the experience of learning about a particular phenomenon is theorised as having educationally critical aspects. Without addressing these aspects in learning experiences, students are highly unlikely to achieve the target understanding desired by the teacher. The approach developed to research educationally critical aspects compares scholarly and student experiences of learning about a phenomenon using the analytical framework of a structure of awareness. An application of the approach is reported in the form of a phenomenographic study which researched didactic knowledge about the concept of an information system (IS). Multiple, previously unreported, educationally critical aspects of learning about the concept of an IS were identified. Some implications of this finding for the design of IS undergraduate curricula, textbooks, teaching strategies and learning tasks are proposed. Finally, the research approach is promoted as a means to investigate didactic knowledge about other phenomena.     

Voices from the East and West: congruence on the primary purpose of tutor feedback in higher education

While feedback in education is important, formative feedback that leads to improvement in students’ learning outcomes and emotional disposition is vital. This argument has been made repeatedly in the Western literature, both by researchers and by students participating in their research in higher education. This paper presents both affective and non-affective improvement as the most frequently occurring theme identified in a mixed-methods study conducted at a National Key University in mainland China, which investigated 232 Chinese students’ experiences and expectations of feedback from their Chinese tutors. This paper, thus, concludes that mainland Chinese university students and Western researchers and students likely agree on the primary function of tutor feedback. The desire for tutor feedback to also or chiefly play a formative role appears not to be a geographically or culturally specific phenomenon.     

Computer‐based cognitive assessment and the development of reading

This paper reports on a longitudinal study using the computer‐based cognitive assessment system CoPS, and considers the applicability of this system in the early identification of cognitive strengths and limitations that affect the development of reading. CoPS comprises eight tests of basic cognitive abilities, including phonological awareness, auditory discrimination, and short‐term visual and auditory‐verbal memory. A total of 421 children participated in the study. Assessment with the CoPS tests was carried out at age 5 years, and follow‐up assessments using conventional tests of reading and general ability were carried out at 6 and 8 years of age. Correlations between the CoPS tests administered at age 5 and reading ability at age 8 were in the region of 0.6 for auditory‐verbal memory and phonological awareness, and in the region of 0.3 for the CoPS measure of auditory discrimination as well as most of the other memory measures. Stepwise linear regression analyses showed that the CoPS tests of auditory‐verbal memory and phonological awareness administered at age 5 together accounted for 50% of the variance in reading ability at age 8, compared with only 29% of the variance being attributable to intelligence. It was concluded that short‐term memory is an important predictor variable for reading, in addition to the more generally acknowledged variable of phonological processing. Discriminant function analysis showed that CoPS tests provide a highly satisfactory prediction of poor reading skills, with very low or zero rates for false positives and false negatives. By contrast, a word recognition test given at age 6 was not found to predict reading at age 8 to the same degree of accuracy, resulting in an unsatisfactory false positive rate of 21%. Measures of verbal and nonverbal ability at age 6 produced unacceptably high false positive rates between 50% and 70%. These findings are discussed in relation to the prediction of children at risk of reading failure. The potential of computer‐based cognitive profiling for facilitating differentiated teaching in early reading is also considered.