ECMs and Institutional Repositories. The Case for a Unified Enterprise Approach to Content Management

Universities are currently developing responses to manage the explosion of research content. There is an expectation by these institutions as well as governments, funding agencies and other stakeholders that research data will be well managed, available and accessible to users as appropriate. The large enterprise content management (ECM) platform vendors are evolving into “information management frameworks”. The ECM solutions being marketed by these vendors are underpinned by content repositories, promising to manage all of the enterprise’s digital assets. One might logically question whether a university actually needs separate institutional repositories (IR) systems and infrastructure such as DSpace, for example, to manage research data. If these new enterprise solutions overcome the historical shortcomings traditionally associated with research content, then what is the future of the IR? The implementation of SharePoint along with new research data services at Griffith University has been a catalyst for beginning to question some of the fundamental paradigms which have underpinned the current thinking about an enterprise approach to research infrastructure and the role of research repositories. Having conducted a literature review, the authors outline the roles of enterprise content management systems and institutional repositories in the context of strategies, processes, and technologies rather than as single products. The focus is on architecture and a management approach rather than technological solutions. This paper explores the synergies between institutional repositories and enterprise content management systems and how research content would fit within the traditional enterprise content management system model. It concludes that there are major benefits in taking a unified enterprise approach to managing research content within a university

Aerobic biotransformation of 2, 4, 6–trichlorophenol by Penicillium chrysogenum in aqueous batch culture: Degradation and residual phytotoxicity

2,4,6-trichlorophenol (TCP) is a toxic compound widespread in the environment, with numerous applications. There are many fungi capable of degrading it, although little attention has been paid to non wood-degrading species. Penicillium chrysogenum ERK1 was able to degrade 85% of TCP in batch cultures in the presence of sodium acetate. Degradation rate was fitted to a specific first-order kinetic and the growth rate was fitted to a Gompertz model. Hydroquinone and benzoquinone were identified as degradation intermediates. The phytotoxicity of the residues was reduced by half after fungal treatment. These results suggest that Penicillium chrysogenum can be applied successfully to biodegrade TCP

Liquid metal embrittlement studies on model systems wiht respect to the spallation target technology: the importance of nanometre-thick films

Liquid metal embrittlement (LME) is illustrated on the Cu-Bi and Cu-PbBi systems at 300 C using either constant strain-rate tests at 10(-4) s(-1) or constant load tests at 25% of yield stress. Intergranular penetration was studied in the Ni-Bi system at 700 C and was shown to result in the formation of slowly growing micrometre-thick and rapidly growing nanometre-thick films. Both induce very strong intergranular brittleness but only micrometre-thick films are visible by SEM on polished cross-sections. Nanometre-thick films were analysed by Auger electron spectroscopy after "in situ" fractures within the spectrometer; in particular, a series of analyses on an Ni bicrystal proved the constant thickness of this film over several hundreds of microns. The severity of embrittlement due to bismuth penetration was confirmed in the analysis of the Ni-PbBi system. Based on these results, it is underlined that technological systems like T91 steel/Pb or T91/PbBi should work at temperatures below the wetting transition temperature (T-W), i. e. in the temperature range where intergranular films can't form. If it is not the case, nanometre-thick films should be taken into account, both in the evaluation of the kinetics of embrittlement and in the modelling of intergranular penetration and LME

Dataset and metrics for predicting local visible differences

A large number of imaging and computer graphics applications require localized information on the visibility of image distortions. Existing image quality metrics are not suitable for this task as they provide a single quality value per image. Existing visibility metrics produce visual difference maps, and are specifically designed for detecting just noticeable distortions but their predictions are often inaccurate. In this work, we argue that the key reason for this problem is the lack of large image collections with a good coverage of possible distortions that occur in different applications. To address the problem, we collect an extensive dataset of reference and distorted image pairs together with user markings indicating whether distortions are visible or not. We propose a statistical model that is designed for the meaningful interpretation of such data, which is affected by visual search and imprecision of manual marking. We use our dataset for training existing metrics and we demonstrate that their performance significantly improves. We show that our dataset with the proposed statistical model can be used to train a new CNN-based metric, which outperforms the existing solutions. We demonstrate the utility of such a metric in visually lossless JPEG compression, super-resolution and watermarking.</jats:p

A finite model of two-dimensional ideal hydrodynamics

A finite-dimensional su($N$) Lie algebra equation is discussed that in the infinite $N$ limit (giving the area preserving diffeomorphism group) tends to the two-dimensional, inviscid vorticity equation on the torus. The equation is numerically integrated, for various values of $N$, and the time evolution of an (interpolated) stream function is compared with that obtained from a simple mode truncation of the continuum equation. The time averaged vorticity moments and correlation functions are compared with canonical ensemble averages.Comment: (25 p., 7 figures, not included. MUTP/92/1

Evidence for a diffusion-based mechanism of liquid metal intergranular penetration : case study of a Ni-Bi model system

A model Ni-Bi system has been used to investigate intergranular penetration (IGP) phenomenon. All experiments have been done on Ni 26° bicrystal at 700°C using bismuth vapour condensation as a source of liquid bismuth. Such a procedure results at room temperature in either partial or total Liquid Metal Induced Embrittlement (LMIE) of a unique grain boundary, depending on the duration of liquid Bi / solid Ni contact at 700°C. Auger Electron Spectrometry (AES) and Rutherford Backscattering Spectrometry (RBS) have been used to measure the Bi concentration profile between the source of liquid bismuth and the penetration front. Two zones have been clearly identified : the first one of almost constant Bi concentration called nanometrethick film which is interpreted in terms of Fowler-Guggenheim multi-layer segregation under local equilibrium conditions and the second one with a progressive decrease of Bi concentration over a distance of the order of 20-200μm. Such a long transition zone, together with parabolic diffusion kinetics indicates diffusion-based mechanism of intergranular penetration as opposed to the direct grain boundary wetting

Tests of 3 linear collider beam dynamics simulation programs

We report on tests of 3 linear collider beam dynamics simulation programs: PLACET, MERLIN, and LIAR. The programs are used to simulate the performance of the TESLA, NLC, and CLIC beamlines from the main linac to the IP. In each case the beamlines have no errors or misalignments

Multilayered genetic and omics dissection of mitochondrial activity in a mouse reference population

The manner by which genotype and environment affect complex phenotypes is one of the fundamental questions in biology. In this study, we quantified the transcriptome--a subset of the metabolome--and, using targeted proteomics, quantified a subset of the liver proteome from 40 strains of the BXD mouse genetic reference population on two diverse diets. We discovered dozens of transcript, protein, and metabolite QTLs, several of which linked to metabolic phenotypes. Most prominently, Dhtkd1 was identified as a primary regulator of 2-aminoadipate, explaining variance in fasted glucose and diabetes status in both mice and humans. These integrated molecular profiles also allowed further characterization of complex pathways, particularly the mitochondrial unfolded protein response (UPR(mt)). UPR(mt) shows strikingly variant responses at the transcript and protein level that are remarkably conserved among C. elegans, mice, and humans. Overall, these examples demonstrate the value of an integrated multilayered omics approach to characterize complex metabolic phenotypes

New insight into the low-energy 9^9He spectrum

The spectrum of $^9$He was studied by means of the $^8$He($d$,$p$)$^9$He reaction at a lab energy of 25 MeV/n and small center of mass (c.m.) angles. Energy and angular correlations were obtained for the $^9$He decay products by complete kinematical reconstruction. The data do not show narrow states at $\sim$1.3 and $\sim$2.4 MeV reported before for $^9$He. The lowest resonant state of $^9$He is found at about 2 MeV with a width of $\sim$2 MeV and is identified as $1/2^-$. The observed angular correlation pattern is uniquely explained by the interference of the $1/2^-$ resonance with a virtual state $1/2^+$ (limit on the scattering length is obtained as $a > -20$ fm), and with the $5/2^+$ resonance at energy $\geq 4.2$ MeV.Comment: 5 pages, 4 figures, 2 table