3 resultados para multiple exposures
em Deakin Research Online - Australia
Resumo:
This paper outlines a practice as research investigation into the construction and representation of the figure and the ground in photography through overlapping multiple temporal and spatial renderings of the same subject within single photographic images.
This included a critical investigation of the representation of time, perspective, and location in historical and contemporary photography with particular attention to the synthesis, imitation, and distinction of characteristics of human vision in this medium especially where they are indicative of consciousness and attention.
This investigation informed a re-evaluation of the premises of the genre of the photographic portrait and it’s setting, especially within the unstructured environment of the Central Victorian ironbark forests and goldfields. Analogue and digital photographic experiments were conducted in superimposed shifts in camera position and their convergence on significant points of focus through repeated exposures across different time scales. The images correspond to a stage in human stereo perception before fusion, to represent the attention of the viewer, where, in these images, the ‘portrait’ is located.
The findings were applied to the large format camera production of high-definition images that extended the range and effectiveness of selected pictorial structures such as selective focus, relative scale, superimposition, multiple exposures and interference patterns.
The outcome was an exhibition at Smrynios Gallery in Melbourne in April 2004. This presentation includes a discussion of relevant work by Australian practitioners Daniel Crooks and David Stephenson.
Resumo:
Cliffed rocky coasts are erosional environments, the remnants of which can be preserved as sea stacks as the shoreline retreats. These sea stacks form spectacular landscapes, such as the iconic Twelve Apostles in Victoria, Australia. However, they are ephemeral features formed on a centennial scale, continually eroding and collapsing, meaning that coasts characterised by sea stacks often have fewer features than when first described. The question arises then as to the longevity of such features and whether they can be preserved over eustatic cycles. The modern Twelve Apostles, of which 8 are still standing, are comprised of the Miocene Port Campbell Limestone and reach 45 m above sea level. Recent multibeam sonar data show five features around 6 km offshore, in 40-50 m water depth that appear to be relict sea stacks. Based on the morphology and geology of both the modern and drowned Apostles, it is inferred that the drowned and modern stacks evolved in a similar manner. While the modern sea stacks have an average height of 45 m, the drowned stacks have an average height of 4 m, suggesting a much greater age and also the possibility of multiple exposures to subaerial processes. The drowned stacks lay 655 m seaward of a drowned cliff averaging 14 m high which likely represents a former interstadial shoreline. This is much greater than the 91 m average distance between stack and cliff for the Modern Apostles, which may imply a more prolonged period of erosion along the drowned coastline.
Resumo:
OBJECTIVES: This study investigated the extent that psychosocial job stressors had lasting effects on a scaled measure of mental health. We applied econometric approaches to a longitudinal cohort to: (1) control for unmeasured individual effects; (2) assess the role of prior (lagged) exposures of job stressors on mental health and (3) the persistence of mental health.
METHODS: We used a panel study with 13 annual waves and applied fixed-effects, first-difference and fixed-effects Arellano-Bond models. The Short Form 36 (SF-36) Mental Health Component Summary score was the outcome variable and the key exposures included: job control, job demands, job insecurity and fairness of pay.
RESULTS: Results from the Arellano-Bond models suggest that greater fairness of pay (β-coefficient 0.34, 95% CI 0.23 to 0.45), job control (β-coefficient 0.15, 95% CI 0.10 to 0.20) and job security (β-coefficient 0.37, 95% CI 0.32 to 0.42) were contemporaneously associated with better mental health. Similar results were found for the fixed-effects and first-difference models. The Arellano-Bond model also showed persistent effects of individual mental health, whereby individuals' previous reports of mental health were related to their reporting in subsequent waves. The estimated long-run impact of job demands on mental health increased after accounting for time-related dynamics, while there were more minimal impacts for the other job stressor variables.
CONCLUSIONS: Our results showed that the majority of the effects of psychosocial job stressors on a scaled measure of mental health are contemporaneous except for job demands where accounting for the lagged dynamics was important.
