51 research outputs found
Experimental reintroduction of woody debris on the Williams River, NSW: geomorphic and ecological responses
No full textA total of 436 logs were used to create 20 engineered log jams (ELJs) in a 1.1 km reach of the Williams River, NSW, Australia, a gravel-bed river that has been desnagged and had most of its riparian vegetation removed over the last 200 years. The experiment was designed to test the effectiveness of reintroducing woody debris (WD) as a means of improving channel stability and recreating habitat diversity. The study assessed geomorphic and ecological responses to introducing woody habitat by comparing paired test and control reaches. Channel characteristics (e.g. bedforms, bars, texture) within test and control reaches were assessed before and after wood placement to quantify the morphological variability induced by the ELJs in the test reach. Since construction in September 2000, the ELJs have been subjected to five overtopping flows, three of which were larger than the mean annual flood. A high-resolution three-dimensional survey of both reaches was completed after major bed-mobilizing flows. Cumulative changes induced by consecutive floods were also assessed. After 12 months, the major geomorphologic changes in the test reach included an increase in pool and riffle area and pool depth; the addition of a pool-riffle sequence; an increase by 0.5-1 m in pool-riffle amplitude; a net gain of 40 m3 of sediment storage per 1000 m2 of channel area (while the control reach experienced a net loss of 15 m3/1000 m2 over the same period); and a substantial increase in the spatial complexity of bed-material distribution. Fish assemblages in the test reach showed an increase in species richness and abundance, and reduced temporal variability compared to the reference reach, suggesting that the changes in physical habitat were beneficial to fish at the reach scale
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Oriental enlightenment: the problematic military experiences and cultural claims of Count Maurice Auguste comte de Benyowsky in Formosa during 1771
No full textMaurice Benyowsky's colourful version of his global adventures during the heady, expansive days of the late-Enlightenment remains still as an historical account, and is perhaps destined for reification at a time of romantic, postmodernist cultural affirmation. Yet this paper argues that within it there lies a virile and possibly dangerous Orientalism, one at least partially based upon a lurid, opportunistic and self-seeking fabrication of his visit to Taiwan (Formosa) in the year 1771. This paper examines the veracity, provenance and historiography of the Benyowsky account of late-eighteenth century Formosa, both as an exercise in one facet of Taiwanese history and as some exploration of the origin and maintenance of European views of the "other" and of the "orient" as they were transforming during the late-Enlightenment period. Furthermore a principal task is to provide an historiographical analysis that illustrates both the initial reasons for the acceptance of Benyowsky's lurid account as well as the wider contexts of its long life as a seemingly reliable and authentic tale. Questions remain as to the cultural contexts of any general acceptance of otherwise doubtful stories, experiments, claims and "adventures". Here there is little doubt that the original Memoirs were given greater credence by Benyowsky's talent in self-fashioning his character and status as those of a reliable gentleman
Putting the wood back into our rivers: an experiment in river rehabilitation
No full textThis paper presents an overview of a project established to assess the effectiveness of woody debris (WD) reintroduction as a river rehabilitation tool. An outline of an experiment is presented that aims to develop and assess the effectiveness of engineered log jams (ELJs) under Australian conditions, and to demonstrate the potential for using a range of ELJs to stabilise a previously de-snagged, high energy gravel-bed channel. Furthermore, the experiment will test the effectiveness of a reach based rehabilitation strategy to increase geomorphic variability and hence habitat diversity. While primarily focusing on the geomorphic and engineering aspects of the rehabilitation strategy, fish and freshwater mussel populations are also being monitored. The project is located within an 1100m reach of the Williams River, NSW. Twenty separate ELJ structures were constructed, incorporating a total of 430 logs placed without any artificial anchoring (e.g., no cabling or imported ballast). A geomorphic control reach was established 3.1 km upstream of the project reach. In the 6 months since the structures were built the study site has experienced 6 flows that have overtopped most structures, 3 of the flows were in excess of the mean annual flood, inundating 19 of the ELJs by 2 - 3 m, and one by 0.5 m. Early results indicate that with the exception of LS4 and LS5, all structures are performing as intended and that the geomorphic variability of the reach has substantially increased
JAB42: The 5-Alive Issue
No full textThis research output (JAB 41 & 43) builds on Mosely’s research portfolio “abbe 2017”. Mosely co-selected papers from abbe 2017 with Brad Freeman (founder and editor of the Journal of Artists’ Books /JAB) for volumes 41 & 43 of JAB. This outcome continues to address the call from scholars in the field to advance the critical nature of the field with a developing critical terminology and corresponding discourse.
Leading up to abbe 2017 Mosely published a short article/note in JAB 40 describing the research focus on artists books emerging at Queensland College of Art, “Inflections & ABBE 2017: Texturing GCCAR's Artists' Book Research Focus”. Abbe 2017 coalesced around Gilles Deleuze’s zweifalt, a fold that both identifies difference and at the same time holds those differences within a relationship. Following abbe 2017 Mosely co-ordinated the selection, peer reviewing and editing of academic papers from the event. In total 5 articles addressing the fold and studio practice, critical discourse and philosophical concerns were accepted by peer review for publication across two volumes of JAB. With an international readership and subscription base to hundreds of libraries and artists books collections around the globe these papers extend Australian artist’s & scholar’s contribution to artists book research in the emerging critical discourse.No Full Tex
JAB 39 The Australian JAB
No full textThis research output (JAB 39) builds on Mosely’s research portfolio “abbe 2015”, He co-edited this volume of The Journal of Artists Books drawing from academic papers delivered at abbe 2015. This outcome addresses the continuing call from scholars in the field to advance the critical nature of the field with a developing critical terminology and corresponding discourse.
A Keynote presenter at abbe 2015 was Brad Freeman, the founder and editor of the Journal of Artists’ Books (JAB) published in the USA. Leading up to abbe Mosely negotiated with Freeman to publish in JAB papers from abbe that represented an original contribution to the field. Following abbe 2015 Mosely co-ordinated the selection, peer reviewing and editing of academic papers from the event. In total 11 articles from the 14 academic papers presented were accepted by peer review for publication in the 39th volume of JAB, now termed “the Australian JAB”. Mosely was also invited by Freeman to produced a small artists book for the Australian JAB). The book he produced was a 48 page offset printed book that positions a range of terms taken from haptic aesthetics into artists book discourse. The book was printed by Brad Freeman, in full CMYK colour, at the Centre for Paper Book and Print, Columbia College Chicago, Chicago, USA. This centre is a leading contributor to the field of artists book discourse. As convenor for abbe Mosely wrote the introduction to the Australian JAB, “Notes on Artists Books from the Antipodes”, In this introduction he provided a basic description of the theoretical framework for the published papers, and the “research question” that shaped the proceeding of abbe 2015.
With an international readership and subscription base to hundreds of libraries and artists books collections around the globe this contribution to artists book research positions the haptic and post literacy as critical elements in the emerging artists book critical discourse.No Full Tex
The revolution of America. [electronic resource] : By the abbe Raynal, author of The philosophical and political history of the establishments, and commerce of the Europeans in both the Indies.
No full textAlso issued as the eighth title in some copies of: Select pamphlets: viz. 1. Lessons to a young prince .. Philadelphia : Mathew Carey, 1796 (Evans 31172).Signatures: [A]p4s B-Ip4sEvans,Hildeburn, C.R. Pennsylvania,Electronic reproduction.English Short Title Catalog,Reproduction of original from Library of Congress
Protein and MRI profiling of genetic frontotemporal dementia
No full textFrontotemporal dementia (FTD) is a group of neurodegenerative diseases with a wide range of symptoms such as loss of inhibition and social cognition, language impairment and motor dysfunction. Genetic FTD, characterized by mutations in one of several disease-causing genes, accounts for 10 - 30% of all cases of FTD. The most common causes for genetic FTD are repeat expansions in C9orf72 and mutations in GRN or MAPT, but there are also many other, rarer causes. Each mutation gives rise to a specific subtype of genetic FTD. These subtypes differ not only in clinical presentation, but also in the underlying pathophysiology. To be able to study, and eventually treat, genetic FTD a thorough understanding of the genetic subtypes is crucial.In this thesis we characterized the effects of a p.Ala417* mutation in TBK1, showing that it causes haploinsufficiency as well as demonstrating systemic effects on the K63 ubiquitination system. We also analyzed blood and cerebrospinal fluid samples from carriers of pathogenic mutations associated with genetic FTD to find biomarkers that can distinguish symptomatic mutation carriers from healthy controls or distinguish between the different genetic subtypes. We also studied how these biomarker candidates correlate with cortical and subcortical atrophy in genetic FTD. The results of these studies have provided a further understanding of genetic FTD as well as new biomarker candidates for several pathological processes.List of scientific papersI. Khoshnood B, Ullgren A, Laffita-Mesa J, Öijerstedt L, Patra K, Nennesmo I, Graff C. TBK1 haploinsufficiency results in changes in the K63-ubiquitination profiles in brain and fibroblasts from affected and presymptomatic mutation carriers. J Neurol. 2022 Jun;269(6):3037-3049. https://doi.org/10.1007/s00415-021-10887-x II. Remnestål J*, Öijerstedt L*, Ullgren A, Olofsson J, Bergström S, Kultima K, Ingelsson M, Kilander L, Uhlén M, Månberg A, Graff C#, Nilsson P#. Altered levels of CSF proteins in patients with FTD, presymptomatic mutation carriers and non-carriers. Transl Neurodegener. 2020 Jun 23;9(1):27. *Shared first author, #Shared last author. https://doi.org/10.1186/s40035-020-00198-y III. Ullgren A*, Öijerstedt L*, Olofsson J, Bergström S, Remnestål J, van Swieten JC, Jiskoot LC, Seelaar H, Borroni B, Sanchez-Valle R, Moreno F, Laforce R, Synofzik M, Galimberti D, Rowe JB, Masellis M, Tartaglia MC, Finger E, Vandenberghe R, de Mendonça A, Tirabosch P, Santana I, Ducharme S, Butler CR, Gerhard A, Otto M, Bouzigues A, Russell L, Swift IJ, Sogorb-Esteve A, Heller C, Rohrer JD, Månberg A, Nilsson P, Graff C. Altered plasma protein profiles in genetic FTD – a GENFI study. Mol Neurodegener. 2023 Nov 15;18(1):85. *Shared first author. https://doi.org/10.1186/s13024-023-00677-6 IV. Ullgren A, Rydell MT, Bergström S, Öijerstedt L, Olofsson J, Bouzigues A, Russell L, Foster P, Ferry-Bolder E, van Swieten J, Jiskoot L, Seelaar H, Sanchez-Valle R, Laforce R, Galimberti D, Vandenberghe R, Gerhard A, Ducharme S, Butler C, Finger E, Tartaglia MC, Masellis M, Rowe J, Synofzik M, Moreno F, Borroni B, Rohrer J, Månberg A, Rodriguez-Vieitez E, Nilsson P, Westman E, Graff C. CSF protein biomarkers associate with cortical and subcortical atrophy: a GENFI study. [Manuscript]</p
Confronting hysteresis: Wood based river rehabilitation in highly altered riverine landscapes of south-eastern Australia
No full textGriffith Sciences, Griffith School of EnvironmentFull Tex
Fourier Ring Correlation with a single image
No full textAs super-resolution methods make it possible to capture images at a resolution beyond the diffraction limit, they have no straightforward measure for optical resolution. Consequently, signal-to-noise ratio-based methods to determine resolution such as Fourier Ring Correlation (FRC) have seen increaseduse. We look at a new method, called 1FRC, as it requires only a single image instead of two (2FRC, the original method). It splits each pixel value into two values according to a binomial distribution, producing two images usable in a standard FRC routine. We consider for which noise modalities and conditionsthe results are equivalent to using 2FRC. If the image noise is only Poisson-distributed we derive mathematically that 1FRC and 2FRC are equivalent. Using simulations on Siemens star test images we find that the mean squared error between 1FRC and 2FRC curves is small for images containing only Poisson noise and a combination of Poisson and low variance Gaussian noise. However, whenthe mean variance ratio 𝜇/𝜎2 (image mean divided by variance of a pixel) is less than one, the 1FRC curve no longer goes to zero at high frequencies, but instead fluctuates at an elevated level. We see that this elevated 1FRC curve level is exactly 1 − 𝜇/𝜎2. For 𝜇/𝜎2 < 0.973 the difference in resolution exceeds one standard deviation of the 1FRC resolution. From this point the Kolmogorov-Smirnov test confidently states that the 1FRC pixel sum distributions are not equal to 2FRC distributions. We also test 1FRC on an experimental dataset made with varying STED intensity. The computed resolution curves fit well to the modified Abbe equation for STED. However, the 1FRC resolutions are up to 30%better than resolutions obtained using decorrelation analysis.Applied Mathematics | Applied Physic
Synthesis and optical property of holmium doped Lithium lead borate glasses
No full textThe new glass system 60B2O3-30PbO-(10-x)Li2O-xHo2O3 (where x =0, 0.1, 0.3 and 0.5 mol) were prepared by conventional melt quenching method. The XRD spectrum confirms the amorphous nature of the sample. The density of these glasses is measured by using Archimedes principle, the values range from 4.23 g/cm-3 to 4.34 g/cm-3 and the corresponding molar volumes are calculated. The optical absorbance studies were carried out on these glasses in the wavelength range of 200nm to 1100nm. The measured optical direct band gap energies were in the range of 3.072eV to 3.259eV and the optical indirect band gap energies in the range of 2.658eV to 2.846eV. The refractive indices of these glasses were measured by using Abbe refractometer and the corresponding polarizabilities of oxide ions are calculated by using Lorentz-Lorentz relations. © 2017 Author(s)
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