Congestion pricing and active transport - evidence from five opportunities for natural experiment

Congestion pricing schemes have been implemented in cities worldwide as a means of addressing externalities associated with inefficient price signals in transport systems. Limited evidence exists however on the secondary impacts of these schemes, which may include both environmental and health benefits associated with a resultant reduction in motor vehicle usage. There is increasing recognition that transport behaviours may play a role as opportunistic population level targets to reduce physical inactivity. Yet limited evidence currently exists on the effectiveness of transport interventions, such as congestion pricing schemes, for improving physical activity levels.This study aims to examine the physical activity effects of congestion pricing, with the health benefits of physical activity well established. Congestion pricing schemes implemented internationally were considered as 'natural experiments' and evidence of modal shift from vehicle to active forms of transport or physical activity effect was reviewed. Twelve studies were included from a search of peer-reviewed and 'grey' literature, with overall evidence for a physical activity or modal shift effect considered weak. The quality of the available evidence was also considered to be low.This is not to say that congestion pricing schemes may not have important secondary physical activity related health benefits. Instead, this review highlights the paucity of evidence that has been collected from real-world implementation of congestion pricing schemes. Given the growing recognition of the importance of distal mediators and determinants of health and the need for an 'all-of-government' approach more and better quality evidence of effectiveness of transport interventions for a broad range of outcomes, including health, is required. Significant barriers to the collection of such evidence exist, with strategies for overcoming some of these barriers identified. Only with a better understanding of the full range of potential health impacts can transport policy be fully utilised as a tool for population health.

Modification of tissue fatty acid composition in Murray cod (Maccullochella peelii peelii, Mitchell) resulting from a shift from vegetable oil diets to a fish oil diet.

The dynamics of fatty acid composition modifications were examined in tissues of Murray cod fed diets containing fish oil (FO), canola oil (CO) and linseed oil (LO) for a 25-week period and subsequently transferred to a FO (finishing/wash-out) diet for a further 16 weeks. At the commencement of the wash-out period, following 25 weeks of vegetable oil substitution diets, the fatty acid compositions of Murray cod fillets were reflective of the respective diets. After transfer to the FO diet, differences decreased in quantity and in numerousness, resulting in a revert to the FO fatty acid composition. Changes in percentages of the fatty acids and total accumulation in the fillet could be described by exponential equations and demonstrated that major modifications occurred in the first days of the finishing period. A dilution model was tested to predict fatty acid composition. In spite of a general reliability of the model (Y=0.9234X+0.4260, R²=0.957, P<0.001, where X is the predicted percentage of fatty acid; Y the observed percentage of fatty acid), in some instances the regression comparing observed and predicted values was markedly different from the line of equity, indicating that the rate of change was higher than predicted (i.e. Y=0.4205X+1.191, R²=0.974, P<0.001, where X is the predicted percentage of α-linolenic acid; Y the observed percentage of α-linolenic acid). Ultimately, using the coefficient of distance (D), it was shown that the fatty acid composition of fish previously fed the vegetable oil diets returned to the average variability of the fillet fatty acid composition of Murray cod after 70 or 97 days (LO and CO respectively).

Content-based video indexing for sports applications using integrated multi-modal approach

To sustain an ongoing rapid growth of video information, there is an emerging demand for a sophisticated content-based video indexing system. However, current video indexing solutions are still immature and lack of any standard. This doctoral consists of a research work based on an integrated multi-modal approach for sports video indexing and retrieval. By combining specific features extractable from multiple audio-visual modalities, generic structure and specific events can be detected and classified. During browsing and retrieval, users will benefit from the integration of high-level semantic and some descriptive mid-level features such as whistle and close-up view of player(s).

The impact of shift-work and organizational climate on health outcomes in nurses

Shift workers have a higher rate of negative health outcomes than day shift workers. Few studies however, have examined the role of difference in workplace environment between shifts itself on such health measures. This study investigated variation in organizational climate across different types of shift work and health outcomes in nurses. Participants (n = 142) were nursing staff from a metropolitan Melbourne hospital. Demographic items elicited the type of shift worked, while the Work Environment Scale and the General Health Questionnaire measured organizational climate and health respectively. Analysis supported the hypotheses that different organizational climates occurred across different shifts, and that different organizational climate factors predicted poor health outcomes. Shift work alone was not found to predict health outcomes. Specifically, permanent night shift workers had significantly lower coworker cohesion scores compared with rotating day and evening shift workers and significantly higher managerial control scores compared with day shift workers. Further, coworker cohesion and involvement were found to be significant predictors of somatic problems. These findings suggest that differences in organizational climate between shifts accounts for the variation in health outcomes associated with shift work. Therefore, increased workplace cohesion and involvement, and decreased work pressure, may mitigate the negative health outcomes of shift workers.

Issues arising from the implementation of a comprehensive assessment approach in a large, multi-modal Bachelor of Commerce Unit

Recent literature in higher education argues university assessment has been too narrow and hasn’t adequately reflected the quality, breadth and depth of students’ learning. Research shows students often prioritise and learn what they need to know for formal, graded assessment and disregard other academic content seen as less relevant to those requirements. The predominance of essays and examinations has therefore tended to constrain learning. The case for a more comprehensive approach has been clearly articulated. So what happens when staff take up the unique challenge of designing fair and uniform assessment for a large, core, multi-modal, multi-campus unit offered nationally and internationally?
When developing an undergraduate Bachelor of Commerce unit at Deakin University, staff considered the most appropriate ways to assess a range of conceptual understandings and communication skills. This resulted in the mapping and adoption of a comprehensive approach incorporating teacher, peer, and self-assessment aspects, individual and group work, oral and written presentations, and the use of portfolios and journals. Particular practices were adopted to control workloads, ensure fairness in marking, and overcome some problems generally associated with group work. When implementing the approach, practical issues arose that demanded adjustments. This paper details the approach taken, outlines research activities, and discusses the practical implications of issues that arose.

Discourses of anxiety in nursing practice : a psychoanalytic case study of the change-of-shift handover ritual

This paper reports on the findings of a study that considered how anxiety might function to organise nurses' practice. With reference to psychoanalytic theory this paper analyses field notes taken during a series of nursing change-of-shift handovers. The handover practices analysed met all the criteria for a ritual, as understood in psychoanalytic theory, and functioned to alleviate anxiety in the short term while symbolically expressing a forbidden and unknown knowledge. We argue that the handover ritual contained certain prohibitions, yet allowed some expression of the prohibited knowledge in a disguised way. The prohibition concerned how the patient affected the nurse, that is, moved the nurse to love and hate the patient. We argue that this prohibition is expressed, in disguise, via the displacement of affection for the patient onto other nurses and through negative stereotyping of some patients. We also argue that these prohibitions of the handover mirror broader prohibitions within nursing, and thus the rituals of the handover become an expression of how professional prohibitions are enacted in practice. We conclude that the important implicit function of the handover ritual is to keep anxiety at bay, thereby enabling the nurse to commence practice rather than being immobilised by the effect of potentially overwhelming anxiety.

Mutually clock-controlled feedback shift registers provide resistance to algebraic attacks

Algebraic attacks have been applied to several types of clock-controlled stream ciphers. However, to date there are no such attacks in the literature on mutually clock-controlled ciphers. In this paper, we present a preliminary step in this direction by giving the first algebraic analysis of mutually clock-controlled feedback shift register stream ciphers: the bilateral stop-and-go generator, A5/1, Alpha 1 and the MICKEY cipher. We show that, if there are no regularly clocked shift registers included in the system, mutually clock-controlled feedback shift register ciphers appear to be highly resistant to algebraic attacks. As a demonstration of the weakness inherent in the presence of a regularly clocked shift register, we present a simple algebraic attack on Alpha 1 based on only 29 keystream bits.

Content-based video indexing for sports applications using integrated multi-modal approach

This thesis presents a research work based on an integrated multi-modal approach for sports video indexing and retrieval. By combining specific features extractable from multiple (audio-visual) modalities, generic structure and specific events can be detected and classified. During browsing and retrieval, users will benefit from the integration of high-level semantic and some descriptive mid-level features such as whistle and close-up view of player(s). The main objective is to contribute to the three major components of sports video indexing systems. The first component is a set of powerful techniques to extract audio-visual features and semantic contents automatically. The main purposes are to reduce manual annotations and to summarize the lengthy contents into a compact, meaningful and more enjoyable presentation. The second component is an expressive and flexible indexing technique that supports gradual index construction. Indexing scheme is essential to determine the methods by which users can access a video database. The third and last component is a query language that can generate dynamic video summaries for smart browsing and support user-oriented retrievals.

Issues arising from the implementation of a comprehensive assessment approach in a large, multi-modal Bachelor of Commerce unit

Recent literature in higher education argues university assessment has been too narrow and hasn’t adequately reflected the quality, breadth and depth of students’ learning. Research shows students often prioritise and learn what they need to know for formal, graded assessment and disregard other academic content seen as less relevant to those requirements. The predominance of essays and examinations has therefore tended to constrain learning. The case for a more comprehensive approach has been clearly articulated. So what happens when staff take up the unique challenge of designing fair and uniform assessment for a large, core, multi-modal, multi-campus unit offered nationally and internationally?

When developing an undergraduate Bachelor of Commerce unit at Deakin University, staff considered the most appropriate ways to assess a range of conceptual understandings and communication skills. This resulted in the mapping and adoption of a comprehensive approach incorporating teacher, peer, and self-assessment aspects, individual and group work, oral and written presentations, and the use of portfolios and journals. Particular practices were adopted to control workloads, ensure fairness in marking, and overcome some problems generally associated with group work. When implementing the approach, practical issues arose that demanded adjustments. This paper details the approach taken, outlines research activities, and discusses the practical implications of issues that arose.