cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evaluation of the effects of tree clearing over time on soil properties, pasture composition and productivity
Creators: name: Sangha, Kamaljit
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 300202
subject: Agricultural land management

description: The overall effect of tree clearing on pasture, litter production and major soil parameters were analysed using multivariate analysis.. "Tree clearing is practised for greater beef production and hence monetary gains from grazing systems of central Queensland. The high rates of clearing in the past and even recently (577, 000 ha/yr during 1999-2001) were mainly to develop land for pastures. The sustainability of cleared pasture systems over the long-term is questioned. Three major types of tree communities i.e. Eucalyptus populnea F. Muell., E. melanophloia F. Muell. and Acacia harpophylla F. Muell. ex. Benth. were selected on one property in central Queensland to quantify the impacts of clearing on pasture production and composition, and soil properties. The impacts were measured over time-since-clearing (recent (<5 years), medium (11-13years) and old (>30 years)) in unreplicated cleared pastures in comparison to their replicated uncleared/intact woodland pastures of each tree community. Measures of pasture above-ground biomass production on a single property over time-sinceclearing in cleared systems showed that gains were not sustained over the long-term. The difference in response to clearing between tree communities was evident and important to support the future policy decisions. The impact of clearing on soil properties (physicochemical and biological) was confirmed, and explained the lesser availability of nutrients with time of clearing in cleared pastures. The changes in some soil properties underscored the associated risks and changes in ecosystem functions due to clearing. Less litter was produced at cleared than uncleared pastures, but nutrient release was faster at cleared compared to uncleared systems. The overall effect of clearing in terms of pasture and litter production, and major soil parameters were analysed using multivariate analyses. -- abstract
Les groupes de Burger-Mozes ne sont pas kählériens
Creators: name: Delcroix, Thibaut
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Burger and Mozes constructed examples of infinite simple groups which are lattices in the group of automorphisms of a cubical building. We show that there can be no morphism with finitely generated kernel from a Kähler group to one of these groups. We obtain as a consequence that these groups are not Kähler.---Burger et Mozes ont construit des exemples de groupes simples infinis, qui sont des réseaux dans le groupe des automorphismes d'un immeuble cubique. On montre qu'il n'existe pas de morphisme d'un groupe kählérien vers l'un de ces groupes dont le noyau soit finiment engendré. On en déduit que ces groupes ne sont pas kählériens.
description: 8 pages, in French
Improving Performance Bounds for Weighted Round-Robin Schedulers under Constrained Cross-Traffic
Creators: name: Constantin, Vlad-Cristian
name: Nikolaus, Paul
name: Schmitt, Jens
Publisher: name: arXiv
Year: 2022
Subjects: subject: Performance (cs.PF)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Weighted round robin (WRR) is an effective, yet particularly easy-to-implement packet scheduler. A slight modification in the implementation of WRR, interleaved weighted round robin, has been proposed as an enhancement of the initial version and has been recently investigated. Network calculus is a versatile framework to model and analyze such network schedulers. By means of this, one can derive theoretical upper bounds on network performance metrics, such as delay or backlog. In our previous work, we derive performance bounds by showing that both round-robin variants belong to a class called bandwidth-sharing policy; however, the proofs are incomplete and thus, we cannot conclude that the round-robin schedulers are bandwidth-sharing policies (under variable packet sizes).To that end, in the subsequent erratum, we introduce so-called resource-segregating policies and show the round-robin schedulers to be members of this class. We first present our original work, as published in [CNS22-1], and then the erratum correcting the previously mentioned shortcoming. In our erratum, we provide slightly worse delay bounds compared to [CNS22-1]; yet, across all our experiments, they significantly outperform the state of the art.
description: Published at IFIP Networking 2022
Scheiterhaufen, Körpergräber, Baggerlöcher. Neue Forschungen zur Chronologie der gemischtbelegten Gräberfelder von Liebenau und Dörverden und das Frühmittelalter in Niedersachsen
Creators: name: Siegmann, Maren
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 73 (2004): Nachrichten aus Niedersachsens Urgeschichte
Factorizer: A Scalable Interpretable Approach to Context Modeling for Medical Image Segmentation
Creators: name: Ashtari, Pooya
name: Sima, Diana M.
name: De Lathauwer, Lieven
name: Sappey-Marinier, Dominique
name: Maes, Frederik
name: Van Huffel, Sabine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Convolutional Neural Networks (CNNs) with U-shaped architectures have dominated medical image segmentation, which is crucial for various clinical purposes. However, the inherent locality of convolution makes CNNs fail to fully exploit global context, essential for better recognition of some structures, e.g., brain lesions. Transformers have recently proven promising performance on vision tasks, including semantic segmentation, mainly due to their capability of modeling long-range dependencies. Nevertheless, the quadratic complexity of attention makes existing Transformer-based models use self-attention layers only after somehow reducing the image resolution, which limits the ability to capture global contexts present at higher resolutions. Therefore, this work introduces a family of models, dubbed Factorizer, which leverages the power of low-rank matrix factorization for constructing an end-to-end segmentation model. Specifically, we propose a linearly scalable approach to context modeling, formulating Nonnegative Matrix Factorization (NMF) as a differentiable layer integrated into a U-shaped architecture. The shifted window technique is also utilized in combination with NMF to effectively aggregate local information. Factorizers compete favorably with CNNs and Transformers in terms of accuracy, scalability, and interpretability, achieving state-of-the-art results on the BraTS dataset for brain tumor segmentation and ISLES'22 dataset for stroke lesion segmentation. Highly meaningful NMF components give an additional interpretability advantage to Factorizers over CNNs and Transformers. Moreover, our ablation studies reveal a distinctive feature of Factorizers that enables a significant speed-up in inference for a trained Factorizer without any extra steps and without sacrificing much accuracy. The code and models are publicly available at https://github.com/pashtari/factorizer.
description: 31 pages, 8 figures, 4 tables
Hamiltonian field theory close to the wave equation: from Fermi-Pasta-Ulam to water waves
Creators: name: Gallone, Matteo
name: Ponno, Antonio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the present work we analyse the structure of the Hamiltonian field theory in the neighbourhood of the wave equation $q_{tt}=q_{xx}$. We show that, restricting to ``graded'' polynomial perturbations in $q_x$, $p$ and their space derivatives of higher order, the local field theory is equivalent, in the sense of the Hamiltonian normal form, to that of the Korteweg-de Vries hierarchy of second order. Within this framework, we explain the connection between the theory of water waves and the Fermi-Pasta-Ulam system.
description: 37 pages; published version with minor changes. Added some remarks and a concluding sectios
Taking Advantage of TMS
Creators: name: Kamrin, Janice
name: Choi, Jennie
Publisher: name: CIPEG Journal: Ancient Egyptian & Sudanese Collections and Museums
Year: 2019

description: The Metropolitan Museum of Art has used TMS (The Museum System) as its collections management system for over twenty years; a subset of the data stored here is fed directly to our Online Collection (https://www.metmuseum.org/art/collection). Over the past decade, the curatorial departments at The Met have worked with the Museum's Digital Department to develop creative ways to use TMS for a variety of purposes: to enhance our online presence, to track important events and processes, to organize and track our archives, and to support research. This paper will provide an overview of several of these initiatives as they are implemented by the Department of Egyptian Art.
description: CIPEG Journal: Ancient Egyptian & Sudanese Collections and Museums, No 3 (2019)
Tunneling dynamics in exactly-solvable models with triple-well potentials
Creators: name: Berezovoj, V. P.
name: Konchatnij, M. I.
name: Nurmagambetov, A. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inspired by new trends in atomtronics, cold atoms devices and Bose-Einstein condensate dynamics, we apply a general technique of N=4 extended Supersymmetric Quantum Mechanics to isospectral Hamiltonians with triple-well potentials, i.e. symmetric and asymmetric. Expressions of quantum-mechanical propagators, which take into account all states of the spectrum, are obtained, within the N = 4 SQM approach, in the closed form. For the initial Hamiltonian of a harmonic oscillator, we obtain the explicit expressions of potentials, wavefunctions and propagators. The obtained results are applied to tunneling dynamics of localized states in triple-well potentials and for studying its features. In particular, we observe a Josephson-type tunneling transition of a wave packet, the effect of its partial trapping and a non-monotonic dependence of tunneling dynamics on the shape of a three-well potential. We investigate, among others, the possibility of controlling tunneling transport by changing parameters of the central well, and we briefly discuss potential applications of this aspect to atomtronic devices.
description: Latex, 28 pages, 7 Figs, 2 Tables; minor presentation changes, journal version
Information systems decision making: Factors affecting decision makers and outcomes
Creators: name: Jamieson, Bruce
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 460999
subject: Information systems not elsewhere classified

description: Explores the information and influences that affect decisions made in relation to the selection of effective information systems.. "Organisations are increasingly reliant on effective information systems (IS) yet little is known about the information and influences that contribute to their selection. Decision makers play an important role in the evaluation, acquisition and implementation of information systems in organisations. Their role during the re-implementation phase of information systems projects is critical, yet little is known about how and why these decisions are made. This thesis explores the influences on these decisions and reports their effects. The aim of this research is to increase the understanding of what occurs during decision making in the critical pre-implementation phase. A cross-disciplinary approach has been employed to develop a research framework informed by literature from information systems, innovation and adoption theory, management decision making and organisational decision making. A qualitative research method was used to develop four exploratory case studies. Research was conducted in private and government organisations that had implemented large information systems. An interpretive hermeneutic text-based analysis technique was used in a cross-case analysis in order to build theory and address the research questions. Fifty-six informational and contextual factors were identified in this research as having effects on information systems pre-implementation decision making. These factors fall into eight broad thematic factor groups: confidence, decision process, opinions, option attributes, organisation, perceptions, politics and vendor attributes. This thesis concludes that there are linkages between decision factors and decision outcomes. It is argued that to achieve positive decision outcomes from information systems preimplementation decisions, conditions for intra- and inter-organisational alignment must exist. It is also argued that information systems re-implementation decision outcomes alter intra- and inter-organisational alignment conditions and affect future decisions." -- abstract.
Developmentalism and the postwar development project: A Foucaultian approach to social change and the operation of power through development
Creators: name: Brigg, MJ
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 440407
subject: Socio-economic development

description: Project explores developmentalism as a "historically and culturally contingent conceptualisation of social change in order to map the location of developmental efforts" ; also, the project elaborates a "Foucaultian framework for analysis of the emergence and operation of the postwar development project".. This thesis undertakes two principal tasks in relation to postwar efforts to develop the Third World. The first of these is to explore "developmentalism" as a historically and culturally contingent conceptualisation of social change in order to map the location of development efforts. By drawing primarily on the work of Michel Foucault, I argue that developmentalism emerges in the late eighteenth and early nineteenth century through intertwined relations of knowledge, power, governing and the constitution of the Western subject. This cultural-historical approach demonstrates that considerations of development efforts should not accord developmentalism, nor the economic relations and concepts which are central to it, their widely-held a priori status. Following from this requirement, the second major task taken up in this thesis involves extending current critical approaches by elaborating a Foucaultian framework for analysis of the emergence and operation of the postwar development project. This methodological approach, based onFoucault's notion of dispositif and his analytic of power, foregrounds relations of power without eliding complexity, resorting to an aggregated view of power, or reducing relations of power to economic relations. Through a macro-level application of Foucault's notion of normalisation, I show that, in the early decades of the development project, the Third World is "normalised" to the standard of economic growth and development embodied by the United States. In considering the current neoliberal conjuncture and the reconfiguration of development efforts in approximately the past two decades, the analytical framework of the dispositif enables analysis of the rise of notions of autonomy and empowerment, the emergence of the microcredit movement and the shift to sustainable development without pre-judging the power effects of these changes. My analysis of participation, empowerment and self-regulation, and the accompanying reconfiguration of development, reveals a shifting operation of power in which subjectification and developmentalist conceptualisations are central. This thesis advances an alternative interpretive framework for the study of development efforts and identifies key contemporary political sites for consideration by development practitioners and scholars.
A Grand Delta(96) x SU(5) Flavour Model
Creators: name: King, Stephen F.
name: Luhn, Christoph
name: Stuart, Alexander J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent results from the Daya Bay and RENO reactor experiments have measured the smallest lepton mixing angle and found it to have a value of theta_13 approximately 9 degrees. This result presents a new challenge for the existing paradigms of discrete flavour symmetries which attempt to describe all quark and lepton masses and mixing angles. Here we propose a Supersymmetric Grand Unified Theory of Flavour based on Delta(96) x SU(5), together with a U(1) x Z3 symmetry, including a full discussion of Delta(96) in a convenient basis. The Grand Delta(96) x SU(5) Flavour Model relates the quark mixing angles and masses in the form of the Gatto-Sartori-Tonin relation and realises the Georgi-Jarlskog mass relations between the charged leptons and down-type quarks. We predict a Bi-trimaximal (not Tri-bimaximal) form of neutrino mixing matrix, which, after including charged lepton corrections with zero phase, leads to the following GUT scale predictions for the atmospheric, solar, and reactor mixing angles: theta_23=36.9 degrees, theta_12=32.7 degrees and theta_13=9.6 degrees, in good agreement with recent global fits, and a zero Dirac CP phase delta~0.
description: 35 pages, version to appear in NPB
A Truncated EM Approach for Spike-and-Slab Sparse Coding
Creators: name: Sheikh, Abdul-Saboor
name: Shelton, Jacquelyn A.
name: Lücke, Jörg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We study inference and learning based on a sparse coding model with `spike-and-slab' prior. As in standard sparse coding, the model used assumes independent latent sources that linearly combine to generate data points. However, instead of using a standard sparse prior such as a Laplace distribution, we study the application of a more flexible `spike-and-slab' distribution which models the absence or presence of a source's contribution independently of its strength if it contributes. We investigate two approaches to optimize the parameters of spike-and-slab sparse coding: a novel truncated EM approach and, for comparison, an approach based on standard factored variational distributions. The truncated approach can be regarded as a variational approach with truncated posteriors as variational distributions. In applications to source separation we find that both approaches improve the state-of-the-art in a number of standard benchmarks, which argues for the use of `spike-and-slab' priors for the corresponding data domains. Furthermore, we find that the truncated EM approach improves on the standard factored approach in source separation tasks$-$which hints to biases introduced by assuming posterior independence in the factored variational approach. Likewise, on a standard benchmark for image denoising, we find that the truncated EM approach improves on the factored variational approach. While the performance of the factored approach saturates with increasing numbers of hidden dimensions, the performance of the truncated approach improves the state-of-the-art for higher noise levels.
description: To appear in JMLR (2014)
Multi-objective robust optimization using adaptive surrogate models for problems with mixed continuous-categorical parameters
Creators: name: Moustapha, M.
name: Galimshina, A.
name: Habert, G.
name: Sudret, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Explicitly accounting for uncertainties is paramount to the safety of engineering structures. Optimization which is often carried out at the early stage of the structural design offers an ideal framework for this task. When the uncertainties are mainly affecting the objective function, robust design optimization is traditionally considered. This work further assumes the existence of multiple and competing objective functions that need to be dealt with simultaneously. The optimization problem is formulated by considering quantiles of the objective functions which allows for the combination of both optimality and robustness in a single metric. By introducing the concept of common random numbers, the resulting nested optimization problem may be solved using a general-purpose solver, herein the non-dominated sorting genetic algorithm (NSGA-II). The computational cost of such an approach is however a serious hurdle to its application in real-world problems. We therefore propose a surrogate-assisted approach using Kriging as an inexpensive approximation of the associated computational model. The proposed approach consists of sequentially carrying out NSGA-II while using an adaptively built Kriging model to estimate the quantiles. Finally, the methodology is adapted to account for mixed categorical-continuous parameters as the applications involve the selection of qualitative design parameters as well. The methodology is first applied to two analytical examples showing its efficiency. The third application relates to the selection of optimal renovation scenarios of a building considering both its life cycle cost and environmental impact. It shows that when it comes to renovation, the heating system replacement should be the priority.
Messung Und Simulation Von Kleinskaligen Austauschvorgängen An Der Ozeanoberfläche Mittels Thermographie
Creators: name: Haußecker, Horst
Publisher: name: Zenodo
Year: 1996
Subjects: gas exchange
thermography
boundary layer

description: Diese Arbeit beschreibt die Entwicklung eines feldgängigen Messinstrumentes, welches erstmals eine Messung der Transfergeschwindigkeit des Gasaustausches auf der freien Meeresoberfläche mit einer zeitlichen Auflösung von wenigen Minuten ermöglichte. Unter Verwendung einer hochempfindlichen Infrarotkamera und eines CO2-Infrarotlasers stand ein Mess-aufbau zur Verfuuml;gung, mit dessen Hilfe die Transportprozessebr />
an der freien Meeresoberflauml;che durch verschiedenartige passive und aktive Meverfahren untersucht werden konnten. Dieses Instrument wurde im Rahmen einer internationalen Mekampagne an Bord des Forschungsschiffes `New Horizon#39; entlang der kalifornischen Kuuml;ste im April/Mai 1995 eingesetzt. Zur quantitativen, thermographischen Bestimmung der Wasseroberflauml;chentemperatur mit einer absoluten Genauigkeit von weniger als 0.1K und einer relativen Genauigkeit von etwa 0.025K wurde eine neuartige Kalibriereinrichtung entwickelt. Neben der Realisierung des Meinstrumentes wurden umfangreiche numerische Simulationen der Vorgauml;nge innerhalb der thermischen Grenzschicht durchgefuuml;hrt. Es zeigte sich, dass die gemessenen Abklingkurven einer lokalen Erwauml;rmung der Wasseroberflauml;che durch den Laser von der numerischen Simulation vorhergesagt werden konnten. Gleichzeitig lieferte die Simulation ein Kriterium fuuml;r die Stabilitauml;t der Auswertung der gemessenen Abklingkurven. Daraus ergab sich, dass die Bestimmung der Transfergeschwindigkeit aus diesen Messungen auf dem Ozean nicht fuuml;r alle Messbedingungen mouml;glich ist. Dies liefert wichtige Anforderungen an die Entwicklung zukuuml;nftiger Messinstrumente. Ausgehend von einer statistischen Analyse der Temperaturverteilung auf der Meeresoberflauml;che wurden zwei weitere, von der Auswertung derbr />
Laser-Abklingkurven unabhauml;ngige Verfahren, zur Bestimmung der Transfergeschwindigkeit entwickelt. Damit konnten die Ergebnisse der Messungen gegenseitig verifiziert werden. Es zeigte sich, dass alle Methoden in sich konsistenteWerte der Gastransfergeschwindigkeit lieferten. Zusauml;tzliche Messungen im Windkanal der Delft Hydraulics, Niederlande, lieferten eine gute Uuml;bereinstimmung der Resultate der Labor- und Ozeanmessungen. Ein weiteres, wichtiges Resultat war die Tatsache, da sich die Ergebnisse der Messungen mit einem einfachen Oberflauml;chenerneuerungsmodell uuml;berraschend gut simulieren lassen. Unter Verwendung dieses Modelles konnte die Statistik der Erneuerungseffekte aus den Messdaten ermittelt werden./p>
Development of a [beta]-adrenoceptor vaccine
Creators: name: Hill, RA
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 310902
subject: Animal cell and molecular biology

description: Aim of the project is to demonstrate that antibodies could be used to activate the [Beta]-adrenoceptor ([Beta]-AR). Identifying a candidate vaccine suitable for administration to cattle which would evoke the production of such antibodies in also investigated.. The efficiency of cattle growth can be enhanced by the use of ß2-adrenoceptor agonist drugs. How-ever, synthetic drugs are not acceptable for use in animal production, and an alternative, immuno-logical manipulation, has been proposed. Thus, one aim of this project was to demonstrate that antibodies could be used to activate the ß2-adrenoceptor (ß2-AR). A second aim was to identify a candidate vaccine suitable for administration to cattle, which would evoke the production of such antibodies. Two vaccine approaches were investigated. Transgenic Escherichia coli which express the human ß2-AR provided one potential source of antigen. However, attempts to affinity purify 2-AR from digitonin solubilised E. coli were unsuccessful. Synthetic peptides were utilised as the second source of antigen. Two of these peptides corresponded to all (24 amino acids) or the N-terminal part (13 amino acids) of the second outer loop of the human ß2-AR. These were designated H24T and H 13C respectively. The third peptide was the bovine homologue of H24T, and was designated bov-H24T accordingly. H24T was highly immunogenic, causing maximum titres assayed by ELISA of 160000 in mice, and 10000 in rabbits and cattle. H13C, was used to immunise mice and rabbits, but evoked antibodies in rabbits only, the maximal titre being about 10000. These results allowed a mouse B epitope on H24T to be partially mapped to positions 185-187 (-Y-A-N-) on the human ß2-AR. Cattle were also immunised with bov-H24T. This peptide was also highly immunogenic, titres rising to a maximum of 12000. Rabbit and bovine antibodies were affinity purified and screened in a number of assays in vitro to determine their interaction with ß₂-AR. Anti-H24T antibodies from three rabbits recognised human ß2-AR, showing some cross-reaction with human ß1- and ß3-AR as determined in immunoblots. Antibodies from one rabbit were investigated further. They were found to increase the affinity of the radioligand [¹²⁵l]- iodocyanopindolol for bovine skeletal muscle ß2-AR. Both rabbit and bovine antibodies induced c-AMP production in rat skeletal muscle at concentrations as low as 1 pM, and increased the potency of isoprenaline in bovine tracheal smooth muscle. This is the first time that anti-ß2-AR antibodies have been shown to evoke a functional response. Thus, it has been shown that antibodies which activate ß2-AR can be raised in cattle in response to a synthetic peptide antigen. Further work will be needed to establish whether this vaccine will mimic the effects of a ß2-agonist drug by increasing the carcase muscle to fat ratio in treated cattle, and whether it is a technology likely to be adopted by the Australian beef industry.
Nonparametric Bayesian methods for one-dimensional diffusion models
Creators: name: van Zanten, Harry
Publisher: name: arXiv
Year: 2012
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: In this paper we review recently developed methods for nonparametric Bayesian inference for one-dimensional diffusion models. We discuss different possible prior distributions, computational issues, and asymptotic results.
Situated knowledges, science and gender: A sociology of organic agriculture in Australia and New Zealand
Creators: name: Lyons, Kristen
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 441007
subject: Sociology and social studies of science and technology

description: Dominant systems of food provision - reliant upon synthetic inputs and capital intensive machinery - have led to a host of adverse social and environmental impacts. The form that more sustainable agricultural systems might take, and how the transition to these might be made, has been much debated in recent years. Amongst this debate, organic (chemical-free) agriculture has been heralded as the basis for more environmentally and socially just systems of food provision. While remaining marginal in size relative to conventional agriculture, increasing interest by both producers and consumers in organic food and agriculture worldwide has sparked rapid growth within this industry in recent decades. Australia and New Zealand are no different, with organics gaining increasing importance throughout both the domestic and international market. Within this context, this thesis examines the situated knowledges of women and men organic producers engaged in the organic agriculture movement across Australia and New Zealand, in order to gain an understanding of their contributions in shaping the trajectory of this industry growth. This theoretical approach provides a framework to examine the gendered - social and cultural - relations that shape the production of knowledge claims. In order to address this research problem, in depth face to face interviews were undertaken with 43 men and 30 women organic producers throughout both Australia and New Zealand, as well as a number of industry representatives. The collection of data related to producers' gendered subjectivities via this method enabled a rich and detailed understanding of the experiences of those involved in the organic industry, thereby contributing to the rural sociological literature that has examined this industry.
The Generation of Fullerenes
Creators: name: Brinkmann, Gunnar
name: Goedgebeur, Jan
name: McKay, Brendan D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We describe an efficient new algorithm for the generation of fullerenes. Our implementation of this algorithm is more than 3.5 times faster than the previously fastest generator for fullerenes -- fullgen -- and the first program since fullgen to be useful for more than 100 vertices. We also note a programming error in fullgen that caused problems for 136 or more vertices. We tabulate the numbers of fullerenes and IPR fullerenes up to 400 vertices. We also check up to 316 vertices a conjecture of Barnette that cubic planar graphs with maximum face size 6 are hamiltonian and verify that the smallest counterexample to the spiral conjecture has 380 vertices.
description: 21 pages; added a note
Interactions of zeros of of polynomials and multiplicity matrices
Creators: name: Nathanson, Melvyn B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B83, 11C08, 11B75, 12D10

description: An $m \times (n+1)$ multiplicity matrix is a matrix $M = ( μ_{i,j} )$ with rows enumerated by $i \in \{ 1,\ 2, \ldots, m \}$ and columns enumerated by $j \in \{ 0,1,\ldots, n \}$ whose coordinates are nonnegative integers satisfying the following two properties: (1) If $μ_{i,j} \geq 1$, then $j \leq n-1$ and $μ_{i,j+1} = μ_{i,j}-1$, and (2) the $j$th column sum of $M$ satisfies the inequality $\sum_{i=1}^{m} μ_{i, j} \leq n-j$ for all $j$. Let $K$ be a field of characteristic 0 and let $f(x)$ be a polynomial of degree $n$ with coefficients in $K$. Let $f^{(j)}(x)$ be the $j$th derivative of $f(x)$. Let $Λ= ( λ_1,\ldots, λ_{m})$ be a sequence of distinct elements of $K$. For $i \in \{1, 2, \ldots, m \}$ and $j \in \{1,2,\ldots, n\}$, let $ μ_{i,j}$ be the multiplicity of $λ_i$ as a zero of the polynomial $f^{(j)}(x)$. The $m \times (n+1)$ matrix $M_f(Λ) = ( μ_{i,j} )$ is called the multiplicity matrix of the polynomial $f(x)$ with respect to $Λ$. An open problem is to classify the multiplicity matrices that are multiplicity matrices of polynomials in $K[x]$ and to construct multiplicity matrices that are not multiplicity matrices of polynomials.
description: 17 pages; minor changes
An investigation of brake application delays in Australian train brake systems
Creators: name: Ripley, Ian
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 400512
subject: Transport engineering

description: An investigation of brake application delays in Australian train brake systems began with a literature review of pneumatic train braking systems. Data located in the review gave examples of brake application delays of pre 1990 designs from the U.K., India and North America. Information on application delays on later Australian designs was scarce. Reading of literature has shown a difference between the Australian and North American control valves in the way the propagation of the pressure reduction rate in the brake pipe is maintained. Control valves of the North American style allow the brake pipe air to be connected for a short time to a small cavity or quick service volume of each valve. The quick service volume is then released to atmosphere. The action of exhausting a small amount of air from the brake pipe helps to ensure a propagation of an adequate pressure reduction rate as it travels to the next valve. Australian control valves rely on the ratio of the volume of brake pipe between control valves and the size of the quick service volume or bulb to ensure the propagation of an adequate pressure reduction as it travels to the next valve. The air in a bulb of an Australian valve is not expelled to atmosphere until a brake release is made. The research explored possible reductions in application delays by utilizing an experimental pipe test rack that included 4 control valves and 120 meters of brake pipe. Experiments with different configurations of exhaust orifices or chokes, valves and branch pipe lengths that supplied the valves gave a record acquired by data acquisition of the timing of each valve and the local pressure drop from a valve or each valve for comparison. Experiments with exhaust chokes that gave a reduction drop rate in the brake pipe that approached the minimum required to operate a control valve resulted in instability of the application operation of the control valve. The quick service volume of different sizes was included in the experiments to give comparisons in the propagation of the pressure reduction toward the end of a long train. Further increases into the size of the bulb of a control valve to enhance the propagation features toward the end of a long train are discussed. The branch pipe with different diameters from 12 mm to 20 mm and lengths from 160 mm to 800 mm when fitted to an adaptor pipe bracket were investigated and results show that larger diameters gave larger gulps in the brake pipe. Other components that were studied included the pipe bracket that is fitted on some control valves. The pipe bracket and isolation cock was found to add 282 mm of additional length to the air path and while not changing the operation of the valve, the results showed a smaller drop in local pressure in the brake pipe to assist the pressure reduction rate than shown in valves without pipe brackets.
Magnetoelectric Cavity Magnonics in Skyrmion Crystals
Creators: name: Hirosawa, Tomoki
name: Mook, Alexander
name: Klinovaja, Jelena
name: Loss, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a theory of magnetoelectric magnon-photon coupling in cavities hosting noncentrosymmetric magnets. Analogously to nonreciprocal phenomena in multiferroics, the magnetoelectric coupling is time-reversal and inversion asymmetric. This asymmetry establishes a means for exceptional tunability of magnon-photon coupling, which can be switched on and off by reversing the magnetization direction. Taking the multiferroic skyrmion-host Cu$_2$OSeO$_3$ with ultralow magnetic damping as an example, we reveal the electrical activity of skyrmion eigenmodes and propose it for magnon-photon splitting of ``magnetically dark'' elliptic modes. Furthermore, we predict a cavity-induced magnon-magnon coupling between magnetoelectrically active skyrmion excitations. We discuss applications in quantum information processing by proposing protocols for all-electrical magnon-mediated photon quantum gates, and a photon-mediated SPLIT operation of magnons. Our study highlights magnetoelectric cavity magnonics as a novel platform for realizing quantum-hybrid systems and the coherent transduction between photons and magnons in topological magnetic textures.
description: 19 pages, 17 figures. Accepted version for PRX Quantum
NLO QCD corrections to multi-jet production at the LHC with a centre-of-mass energy of sqrt(s)=8 TeV
Creators: name: Badger, Simon
name: Biedermann, Benedikt
name: Uwer, Peter
name: Yundin, Valery
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study three and four jet production in hadronic collisions at next-to-leading order accuracy in massless QCD. We cross check results previously obtained by the BlackHat collaboration for the LHC with a centre-of-mass energy of sqrt(s)=7 TeV and present new results for the LHC operating at 8 TeV. We find large negative NLO corrections reducing the leading-order cross sections by about 40-50%. Furthermore we observe an important reduction of the scale uncertainty. In addition to the cross sections we also present results for differential distributions. The dynamical renormalization/factorization scale used in the calculation leads to a remarkably stable K-factor. The results presented here were obtained with the NJet package, a publicly available library for the evaluation of one-loop amplitudes in massless QCD.
description: 10+9 pages, 20 figures, 15 tables. v2: reference added. additional table of comparisons with known results at 7 TeV. published version
Constraining ultra-high-energy cosmic ray composition through cross-correlations
Creators: name: Tanidis, Konstantinos
name: Urban, Federico R.
name: Camera, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The chemical composition of the highest end of the ultra-high-energy cosmic ray spectrum is very hard to measure experimentally, and to this day it remains mostly unknown. Since the trajectories of ultra-high-energy cosmic rays are deflected in the magnetic field of the Galaxy by an angle that depends on their atomic number $Z$, it could be possible to indirectly measure $Z$ by quantifying the amount of such magnetic deflections. In this paper we show that, using the angular harmonic cross-correlation between ultra-high-energy cosmic rays and galaxies, we could effectively distinguish different atomic numbers with current data. As an example, we show how, if $Z=1$, the cross-correlation can exclude a $39\%$ fraction of Fe56 nuclei at $2σ$ for rays above $100\text{EeV}$.
description: 15 pages, 6 figures + appendix. Version matching publication at journal
Studies on freshwater thermophilic amoebae in natural and man-made water bodies in the Rockhampton area
Creators: name: Applegarth, Patrick J
Publisher: name: CQUniversity
Year: 2021
Subjects: classificationCode: 310799
subject: Microbiology not elsewhere classified

description: Free-living amoebae (FLA) are an assemblage of heterotrophic, eukaryotic organisms, which survive in a range of specialised and extreme environments worldwide. A few, namely Naegleria fowleri, pathogenic Acanthamoeba spp. and Balamuthia mandrillaris may occasionally become parasites of humans and produce life and sight-threatening diseases that are difficult to treat effectively. This thesis presents the findings of a 12-month survey of 3 natural and 3 man-made water-bodies in the Rockhampton area. It was undertaken to determine if these thermophilic FLA were present in readily recoverable quantities using the samplevolumes detailed in this study thereby reflecting high population densities which could pose a potential health hazard to humans using these water bodies recreationally." -- abstract. Free-living amoebae (FLA) are an assemblage of heterotrophic, eukaryotic organisms, which survive in a range of specialised and extreme environments worldwide. A few, namely Naegleriafowleri, pathogenic Acanthamoeba spp. and Balamuthia mandrillaris may occasionally become parasites of humans and produce life and sight-threatening diseases that are difficult to treat effectively.This thesis presents the findings of a 12-month survey of 3 natural and 3 manmade water-bodies in the Rockhampton area. It was undertaken to determine if these thermophilic FLA were present in readily recoverable quantities using the sample volumes detailed in this study thereby reflecting high population densities which could pose a potential health hazard to humans using these water bodies recreationally. Thennophilic FLA were recovered from all sites with the majority being isolated in the warmer months of spring and summer. In addition, culture dynamics and desiccation experiments were conducted to study the response of FLA to laboratory manipulation of parameters that included food supply and the effects of prolonged desiccation with the objective being to predict survivability of FLA populations in response to changing environmental conditions. Food supply experiments showed that N. fowleri would survive as dormant cysts after consuming a finite food supply. Desiccation experiments conducted at 22°C showed that all of the five species of thermophilic FLA would survive to 14 weeks. This thesis demonstrated that thermophilic FLA are a common component of the microbiota of freshwater bodies in Rockhampton's tropical environment.
Rheinzaberner Sigillata-Formschüsseln im Bestand der Stadtgeschichtlichen Sammlungen Baden-Baden
Creators: name: Knierriem, Peter
name: Löhnig, Elke
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 22 Nr. 1 (1998): Fundberichte aus Baden-Württemberg
Time evolution of continuous-time quantum walks on dynamical percolation graphs
Creators: name: Darázs, Zoltán
name: Kiss, Tamás
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the time evolution of continuous-time quantum walks on randomly changing graphs. At certain moments edges of the graph appear or disappear with a given probability. We focus on the case when the time interval between subsequent changes of the graph tends to zero. We derive explicit formulae for the general evolution in this limit. We find that the percolation in this limit causes an effective time rescaling. Independently of the graph and the initial state of the walk, the time is rescaled by the probability of keeping and edge. Both the individual trajectories for a single system and average properties with a superoperator formalism are discussed. We give an analytical proof for our theorem and we also present results from numerical simulations of the phenomena for different graphs.
description: 7 pages, 5 figures
The Magnetoelectric Effect in Transition Metal Oxides: Insights and the Rational Design of New Materials from First Principles
Creators: name: Birol, Turan
name: Benedek, Nicole A.
name: Das, Hena
name: Wysocki, Aleksander L.
name: Mulder, Andrew T.
name: Abbett, Brian M.
name: Smith, Eva H.
name: Ghosh, Saurabh
name: Fennie, Craig J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The search for materials displaying a large magnetoelectric effect has occupied researchers for many decades. The rewards could include not only advanced electronics technologies, but also fundamental insights concerning the dielectric and magnetic properties of condensed matter. In this article, we focus on the magnetoelectric effect in transition metal oxides and review the manner in which first-principles calculations have helped guide the search for (and increasingly, predicted) new materials and shed light on the microscopic mechanisms responsible for magnetoelectric phenomena.
description: 24 pages, 12 figures
Observational Constraints on Quintessence: Thawing, Tracker, and Scaling models
Creators: name: Chiba, Takeshi
name: De Felice, Antonio
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For two types of quintessence models having thawing and tracking properties, there exist analytic solutions for the dark energy equation of state w expressed in terms of several free parameters. We put observational bounds on the parameters in such scenarios by using the recent data of Supernovae type Ia, Cosmic Microwave Background, and Baryon Acoustic Oscillations. The observational constraints are quite different depending on whether or not the recent BAO data from BOSS are taken into account. With the BOSS data the upper bounds of today's values of w (=w_0) in thawing models is very close to -1, whereas without this data the values of w_0 away from -1 can be still allowed. The tracker equation of state w_{(0)} during the matter era is constrained to be w_{(0)}
description: 12 pages, 10 figures
Approximate Information States for Worst-case Control of Uncertain Systems
Creators: name: Dave, Aditya
name: Venkatesh, Nishanth
name: Malikopoulos, Andreas A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper, we investigate a worst-case-scenario control problem with a partially observed state. We consider a non-stochastic formulation, where noises and disturbances in our dynamics are uncertain variables which take values in finite sets. In such problems, the optimal control strategy can be derived using a dynamic program (DP) with respect to the memory. The computational complexity of this DP can be improved using a conditional range of the state instead of the memory. We present a more general definition of an information state which is sufficient to construct a DP without loss of optimality, and show that the conditional range is an example of an information state. Next, we extend this notion to define an approximate information state and an approximate DP. We also bound the maximum loss of optimality when using an approximate DP to derive the control strategy. Finally, we illustrate our results in a numerical example.