A new approach for reducing blocking artefacts using linear filter for block based transform coded images

This paper presents a new approach to filtering the reconstructed image of block based transform coded images.

Shaping practice: worksheets as social artefacts

Part of a broader research project on the development of mathematical understanding in primary classrooms, the research reported in this paper focused on how opportunities to learn about percentage in two classrooms were shaped by worksheets. The words in the text, the way that the teachers replicated these orally, a grid used to illustrate the concept of percentage, the genre of both mathematical and non-mathematical aspects of the worksheet's presentation, and the calculation methods presented were all potentially influential aspects. It is argued that the "knowledge" conveyed by the texts of the worksheets was distributed over a much wider field than the classrooms involved.

Reducing blocking artefacts in MPEG video coded images using entropic methods

In this paper investigation is made of the. use of entropic methods to identify smooth image blocks in order to filter the reconstructed image of block based transform coded images. We know that blocking artefact is Visually more prominent in the smooth region of a block rather than in the textured region. The entropic methods are employed to distinguish between smooth and textured blocks in a reconstructed image. The linear filtering is then carried out on the smooth region of the image to reduce the blocking artefact. The en tropic criteria investigated in this paper are: Shannon's (Logarithmic) Entropy, Exponential Entropy, and Quadratic Entropy.

Examination of the codes of ethics artefacts in top Taiwanese companies

This study examines the use of codes of ethics artefacts among top companies in Taiwan. This research reports on the responses of those top Taiwanese companies that possessed a code of ethics. The empirical findings are compared to the findings of previous research. Top Taiwanese companies appear not to be drastically different from top companies in other countries in terms of the areas examined. Several similarities have been revealed. This study provides valuable insights into a previously unexplored corporate territory in terms of codes of ethics artefacts. Furthermore, it provides a seed and guidance for further research in other corporate cultures worldwide. Two parts of interest to business practices may be distinguished in terms of corporate codes of ethics artefacts, namely a regulatory one and one that supports staff. It also provides a valuable point of reference to previous research of corporate codes of ethics artefacts.

Codes of ethics artefacts in Australia, Canada and Sweden : a longitudinal study

It would appear that corporations operating in Sweden have embraced the ethos of codes of ethics differently to their Canadian and/or Australian counterparts and that in each culture the way that companies fashion their approach to business ethics appears to be in line with their national, cultural values.

Testosterone effects on avian basal metabolic rate and aerobic performance : facts and artefacts

We examined the effects of cage size and testosterone (T) levels on basal and peak metabolic rates (BMR and PMR, respectively) and on pectoral and leg muscle masses of male house sparrows (Passer domesticus). Birds were housed either in small birdcages or in flight aviaries for at least 2 weeks prior to the initial metabolic evaluations. They were then implanted with either empty or T-filled silastic capsules and remeasured 5–6 weeks later. Birds treated with single T implants achieved breeding levels (4–6 ng/mL) and one group given double implants reached 10 ng/mL. There was no effect of T on BMR or PMR in any group studied, but there was an effect of caging. Caged birds showed significant reductions in PMR over the course of captivity, whereas PMR in aviary-housed birds were indistinguishable from their free-living counterparts. Testosterone treatment significantly increased leg muscle mass in caged birds, but had no effect on muscle mass in aviary-housed sparrows. We conclude that testosterone has no direct effect on sparrow metabolic rate or muscle mass, but may interact with cage conditions to produce indirect changes to these variables.

Dolly girls : tweenies as artefacts of consumption

The apparent sexualization and exploitation of young girls by the consumer media is a much debated topic in the advanced liberal democracies. This paper will develop the argument that the ‘consumer-media culture’ has established itself as one of the most powerful influences in processes of self-formation for young people, and that a tweenie self can be understood as an artefact of consumption. We will identify and analyse the resources that the consumer media provides to tweenies - girls aged between 9 and 14 - as they seek to fashion a sense of self. The paper presents an analysis of the resources presented to this population of young girls/women by an Australian ‘appearance’ magazine, Dolly. We will argue that these identity resources are limited in scope, are dominated by images of young, slim and attractive females, and position the tweenie self as an artefact of consumption.

The Use of Videos and Classroom Artefacts in Professional Development of Teachers and Teacher Educators in Indonesia

This study is grounded on adaptations of Realistic Mathematics Education, Lesson Study and design-based research in Indonesian classroom contexts. Design-based research has gained currency in educational research over the past decade due to its strength to bridge the divide between theoretical research and educational practice in naturalistic settings. Design-based approaches involve a process of designing mathematical tasks, observing the enacted design in classrooms and reflecting on the process from analysing the classroom artefacts. Video plays a central role in supporting teachers and teacher educators to study and reflect on students’ mathematical thinking and in capturing the dynamic of classroom teaching and learning process. This chapter will examine and analyse practitioners’ lenses in capturing the dynamic and complexity of classroom mathematical learning using video vignettes and classroom artefacts including digital photos of classroom moments and students’ work. Practitioners’ lenses are taken as a window to capture key teaching and learning moments from the lessons. Analysis of this selection of these video vignettes along with other classroom artefacts based on practitioners’lenses provides insights into practitioners’ views on key teaching and learning moments in mathematics lessons.

Gathering for God : George Brown in Oceania

Combining 'the gathering of artefacts with the gathering of souls', George Brown was a key figure in the Christian, and especially the Wesleyan Methodist, history of nineteenth-century Oceania. Using his life as a case study, Helen Bethea Gardner examines the role of Christian missionaries in the Pacific Islands. Brown's career (1860-1908) spanned one of the most tumultuous political periods in the South Pacific, as one by one islands were colonised by imperial nations. He was one of the most politically engaged of all missionaries, encouraging colonial rule in the Pacific by America, Britain, Germany and, eventually, Australia and New Zealand. Originally from the north of England, he worked as a missionary in Samoa from 1860, moving to the Bismarck Archipelago (now Papua New Guinea) in 1875. From the 1880s until his retirement in 1907, he worked in Sydney as the general secretary of the Australasian Methodist Overseas Mission. Gathering for God examines Brown's missionary letters, journals and journalism, exploring how he attracted Pacific Islanders to Christian teachings, analysing his leadership during an armed attack on New Britain villages accused of cannibalism, and looking at his work in the new discipline of anthropology. He was a major collector of artefacts (his collection is now in the Osaka Museum) and photographer of Pacific peoples (his collection is in the Australian Museum).

Futures for Australian curriculum studies: metaphors, genres and complicated conversations

My specific brief for the conference presentation on which this essay is based was to speak from the standpoint of a 'curriculum theorist'. However, I rarely use the terms 'curriculum theory' or 'curriculum theorising' other than in the company of US and Canadian colleagues. I prefer to speak of 'curriculum inquiry' or 'curriculum work' and I think of my work as a university teacher and researcher as being directed towards understanding curriculum. From this standpoint I interpret the theme of this Point and Counterpoint, 'Futures for Australian Curriculum', as a focus for speculation on the possible and desirable ways in which the arts of curriculum inquiry can be developed, tested and renewed. In other words, how can we sustain rigorous, vigorous and generative forms of curriculum work?
I will respond to this question by referring to three artefacts of Australian curriculum studies, the first two of which come from the Australian
Curriculum Studies Association's (ACSA) own material history; the third is (arguably) the major synoptic text of North American 'curriculum theory' published during the past decade. I will use these artefacts to illustrate three key issues concerning futures in curriculum inquiry, namely:
• the significance of metaphor;
• questions about genre and a renewed role for
the arts in our work;
• the idea of 'complicated conversation'.

Ethical behaviour: the means for creating and maintaining better reputations in arts organisations

Arts organisations, unsure of the level of continued government funding available and confronted with the need ever to improve, are seeking new ideas upon which they can focus. At a time when leadership and governance in arts organisations have changed in line with cultural expectations, how is their ethical stance assessed? How does their ethical stance impact on reputation? The challenge to build a good reputation starts at the top of the organisation; however, traditionally, one type of arts organisation, art museums, has focused on the activities level. In an age of globalisation, economic restructuring and technological change, museums therefore may be seen as a contradiction. Traditionally seen as temples for the muses, today’s museums are being challenged to be ethical for society and to build their reputation. As a solution, proposes a cooperative model of cultural organisational ethics that attempts to provide a framework by which arts organisations can put in place ethical artefacts that enhance organisational reputation, rather than detract from it.