cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characterizing meromorphic pseudo-lemniscates
Creators: name: Richards, Trevor
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C35, 37E10

description: Let $f$ be a meromorphic function with simply connected domain $G\subset\mathbb{C}$, and let $Γ\subset\mathbb{C}$ be a smooth Jordan curve. We call a component of $f^{-1}(Γ)$ in $G$ a $Γ$-$pseudo$-$lemniscate$ of $f$. In this note we give criteria for a smooth Jordan curve $\mathcal{S}$ in $G$ (with bounded face $D$) to be a psuedo-lemniscate of $f$ in terms of the number of preimages (counted with multiplicity) which a given $w$ has under $f$ in $D$, as $w$ ranges over the Riemann sphere. We also develop a test, in the same terms, by which one may show that the image of a Jordan curve under $f$ is not a Jordan curve.
description: 7 pages, Follow-up to "Conformal Models and Fingerprints of Pseudo-lemniscates" by Richards and Younsi
Amplitude analysis of resonant production in three pions
Creators: name: Jackura, Andrew
name: Mikhasenko, Mikhail
name: Szczepaniak, Adam
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present some results on the analysis of three pion resonances. The analyses are motivated by the recent release of the largest data set on diffractively produced three pions by the COMPASS collaboration. We construct reaction amplitudes that satisfy fundamental $S$-matrix principles, which allows the use of models that have physical constraints to be used in fitting data. The models are motivated by the isobar model that satisfy unitarity constraints. The model consist of a Deck production amplitude with which final state interactions are constrained by unitarity. We employ the isobar model where two of the pions form a quasi-stable particle. The analysis is performed in the high-energy, single Regge limit. We specifically discuss the examples of the three pion $J^{PC}=2^{-+}$ resonance in the $ρπ$ and $f_2π$ channels.
description: 4 pages, 1 figure, proceedings of the "14th International Workshop on Meson Production, Properties and Interaction" (MESON2016), Krak\'ow, Poland, June 02-07, 2016
The $d \: ^3 Π$ state of LiRb
Creators: name: Stevenson, I.
name: Blasing, D.
name: Altaf, A.
name: Chen, Y. P.
name: Elliott, D. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report our spectroscopic studies of the $d \ ^3Π$ state of ultra-cold $^7$Li$^{85}$Rb using resonantly-enhanced multi-photon ionization and depletion spectroscopy with bound-to-bound transitions originating from the metastable $a \ ^3Σ^+$ state. We evaluate the potential of this state for use as the intermediate state in a STIRAP transfer scheme from triplet Feshbach LiRb molecules to the $X \ ^1Σ^+$ ground state, and find that the lowest several vibrational levels possess the requisite overlap with initial and final states, as well as convenient energies. Using depletion measurements, we measured the well depth and spin-orbit splitting. We suggest possible pathways for short-range photoassociation using deeply-bound vibrational levels of this electronic state.
Hedonic perceptions and asymmetric competition in floral marketing
Creators: name: Oppenheim, Peter P.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Hybrid benchmarking of arbitrary quantum gates
Creators: name: Chasseur, Tobias
name: Reich, Daniel M.
name: Koch, Christiane P.
name: Wilhelm, Frank K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a protocol for Interleaved Randomized Benchmarking of arbitrary quantum gates using Monte Carlo sampling of quantum states. It is generally applicable, including non-Clifford gates while preserving key advantages of Randomized Benchmarking such as error amplification as well as independence from state preparation and measurement errors. This property is crucial for implementations in many contemporary systems. Although the protocol scales exponentially in the number of qubits, it is superior to direct Monte Carlo sampling of the average gate fidelity in both the total number of experiments by orders of magnitude and savings in classical preprocessing, that are exponential.
3DBionotes COVID-19 Outbreak Edition
Creators: name: Macias, Jose Ramon
name: Sanchez-Garcia, Ruben
name: Conesa, Pablo
name: Erney Ramirez Aportela
name: Gonzalez, Marta Martinez
name: Mora, Joan Segura
name: Sorzano, Carlos Oscar Sanchez
name: Carazo, Jose Maria
Publisher: name: F1000 Research Limited
Year: 2020

description: Structural analysis of the biological macromolecules involved in the interaction between the SARS-CoV-2 virus and its host is crucial not only to understand the processes during infection, but also may offer reasonable targets for drug screening studies or help during validation of predicted ligand interactions.

3DBionotes-WS is a set of Web Services providing multiple annotations oriented to structural biology analysis, plus a website interface including a 3D viewer for macromolecular models and Cryo-EM derived maps.

Here we present a new section of our web dedicated to collect and present all available structural data related with the SARS-CoV-2.
The Re-Defining of Ethno-Anthropological Museum's Concept in Italy and France
Creators: name: Caradonna, Marta
Publisher: name: Zenodo
Year: 2023
Subjects: subject: Museums
subject: Anthropology
subject: FOS: Sociology
subject: Ethnography
subject: Lamberto Loria
subject: Luigi Pigorini
subject: Georges-Henri Riviére

description: Poster presented at the Conference “The future of Ethnographic Museums”, Pitt Rivers Museum and Keble College, University of Oxford, 19-21July 2013
The challenge of administrative reform : public service reform under the Hamer and Kennett governments in Victoria
Creators: name: O'Neill, Deirdre
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Chiral magnetic excitations in FeGe films
Creators: name: Turgut, Emrah
name: Park, Albert
name: Nguyen, Kayla
name: Moehle, Austin
name: Muller, David A.
name: Fuchs, Gregory D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Although chiral magnetic materials have emerged as a potential ingredient in future spintronic memory devices, there are few comprehensive studies of magnetic properties in scalably-grown thin films. We present growth, systematic physical and magnetic characterization, and microwave absorption spectroscopy of B20 FeGe thin films. We also perform micromagnetic simulations and analytical theory to understand the dynamical magnetic behavior of this material. We find magnetic resonance features in both the helical and field-polarized magnetic states that are well explained by micromagnetic simulations and analytical calculations. In particular, we show the resonant enhancement of spin waves along the FeGe film thickness that has a wave vector matching the helical vector. Using our analytic model, we also describe the resonance frequency of a helical magnetic state, which depends solely on its untwisting field. Our results pave the way for understanding and manipulating high frequency spin waves in thin-film chiral-magnet FeGe near room temperature.
description: 35 pages total in manuscript format, 5 figures, supporting information
Deafness, its representation and misrepresentation after 1990 in Australian and Persian picturebooks, written for children
Creators: name: Eskandari, Behnaz
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Throughout history, children have been born unhearing and we have left them unheard. Across the globe, deaf children have been enculturated in relation to the sphere of ‘Hearing-ness’, constructed in terms of their non-hearing otherness to mainstream culture. In recent history, however, as part of an increasingly visible and vibrant disability culture, Deaf Culture has emerged as a prominent social force and deaf activists have claimed their own voices and underscored identities via the success of movements such as ‘Deaf President Now’. In many ways, they have succeeded in generating new discursive possibilities for the representation of deafness and in transforming the linguistic and semantic possibilities for exploring the lived experience of deaf subjects. Since the late-twentieth century, literary works – especially texts written for children – have played a prominent transformational role and Disability Studies scholars have started to debate literature’s cultural intervention and managed to insert their own lexicon and theoretical frameworks to the field of children’s literature. Children’s writers have engaged in practices of intervention, looking to improve the lives of unhearing children by exploring new representational possibilities that reflect a new range of cultural and subjective roles. These processes of representation are, however, varied and texts appearing in different cultural spheres reflect a complex network of cultural and historical perceptions that frame experiences of deafness and hearing disability, inviting scholarly reflection upon the differences in representational practice that emerge in the global field of children’s literature and of disability scholarship. In response to such an invitation, this thesis undertakes a comparative study of the representation of deafness and of deaf subjects in Persian and Australian picturebooks produced since 1990. It explores how deafness has been thematized in a limited corpus of works that are representative of the wider context of each cultural frame and offers a comparative study of the underlying schemas, mental models and ideological patterns that have been embedded through narrative conventions. In conversation with broader interdisciplinary contexts of disability studies and the cultural norms of representation in each tradition, the study also explores whether dominant social discourses that traditionally used to pity and exclude Deaf Culture and deny deaf characters’ agency, are perpetuated or challenged in contemporary children’s picturebooks. Further, employing key concepts from the field of cognitive narratology to delve into how textually modified cognitive instruments add to specific qualities of literary texts and affect cognitive engagement between the child-reader and the picturebooks to which they are exposed.
title: From Lover to Silence: A Freudian Reading of Maternal Substitution in Monna Innominata
Creators: name: Ezell, Lydia
Publisher: name: Georgia State University
Year: 2026

description:
I apply the Freudian theories of regression, substitution, and mother-want to argue that the speaker of Monna Innominata uses different relationships as substitutes for the primal desire to return to the mother. Grounded in Freuds fort-da theory, I argue that the speaker experiences anxiety about separation and connection as she cannot return to the full connection and satisfaction of needs experienced in the womb. Both the romantic and religious relationships place the speaker in a state of infantile regression through her dependency and longing as they fail to satisfy the speakers deeper desire to reunite with the mother. Freud writes that the only way to return to the maternal is through death. The speaker achieves reunion with the maternal and escapes from failed substitutions through a return to the silence of death.
On stability of exponential cosmological solutions with non-static volume factor in the Einstein-Gauss-Bonnet model
Creators: name: Ivashchuk, V. D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A (n+1)-dimensional gravitational model with Gauss-Bonnet term and cosmological constant term is considered. When ansatz with diagonal cosmological metrics is adopted, the solutions with exponential dependence of scale factors: a_i ~ exp( v^i t), i = 1, ..., n, are analysed for n > 3. We study the stability of the solutions with non-static volume factor, i.e. if K(v) = \sum_{k = 1}^{n} v^k \neq 0. We prove that under certain restriction R imposed solutions with K(v) > 0 are stable while solutions with K(v) < 0 are unstable. Certain examples of stable solutions are presented. We show that the solutions with v^1 = v^2 = v^3 = H > 0 and zero variation of the effective gravitational constant are stable if the restriction R is obeyed.
description: 20 pages, no figures, LaTex; two Remarks (1 and 4) and 7 references are added
Specialization, openness and growth, with empirical studies on China
Creators: name: Ng, Siang Seok Hean
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Electron Acceleration in Pulsar-Wind Termination Shocks: An Application to the Crab Nebula Gamma-Ray Flares
Creators: name: Kroon, John J
name: Becker, Peter A
name: Finke, Justin
name: Dermer, Charles
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The γ-ray flares from the Crab nebula observed by AGILE and Fermi-LAT reaching GeV energies and lasting several days challenge the standard models for particle acceleration in pulsar wind nebulae, because the radiating electrons have energies exceeding the classical radiation-reaction limit for synchrotron. Previous modeling has suggested that the synchrotron limit can be exceeded if the electrons experience electrostatic acceleration, but the resulting spectra do not agree very well with the data. As a result, there are still some important unanswered questions about the detailed particle acceleration and emission processes occurring during the flares. We revisit the problem using a new analytical approach based on an electron transport equation that includes terms describing electrostatic acceleration, stochastic wave-particle acceleration, shock acceleration, synchrotron losses, and particle escape. An exact solution is obtained for the electron distribution, which is used to compute the associated γ-ray synchrotron spectrum. We find that in our model the γ-ray flares are mainly powered by electrostatic acceleration, but the contributions from stochastic and shock acceleration play an important role in producing the observed spectral shapes. Our model can reproduce the spectra of all the Fermi-LAT and AGILE flares from the Crab nebula, using magnetic field strengths in agreement with the multi-wavelength observational constraints. We also compute the spectrum and duration of the synchrotron afterglow created by the accelerated electrons, after they escape into the region on the downstream side of the pulsar wind termination shock. The afterglow is expected to fade over a maximum period of about three weeks after the γ-ray flare.
description: Accepted for publication in ApJ
Choice of technique in land preparation, West Java, Indonesia
Creators: name: Nehen, I Ketut
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
The essential role of time in network-based recommendation
Creators: name: Vidmer, Alexandre
name: Medo, Matus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Random walks on bipartite networks have been used extensively to design personalized recommendation methods. While aging has been identified as a key component in the growth of information networks, most research has focused on the networks' structural properties and neglected the often available time information. Time has been largely ignored both by the investigated recommendation methods as well as by the methodology used to evaluate them. We show that this time-unaware approach overestimates the methods' recommendation performance. Motivated by microscopic rules of network growth, we propose a time-aware modification of an existing recommendation method and show that by combining the temporal and structural aspects, it outperforms the existing methods. The performance improvements are particularly striking in systems with fast aging.
description: 7 pages, 3 figures, 2 tables
Measurement of the low-energy quenching factor in germanium using an $^{88}$Y/Be photoneutron source
Creators: name: Scholz, B. J.
name: Chavarria, A. E.
name: Collar, J. I.
name: Privitera, P.
name: Robinson, A. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We employ an $^{88}$Y/Be photoneutron source to derive the quenching factor for neutron-induced nuclear recoils in germanium, probing recoil energies from a few hundred eV$_{nr}$ to 8.5keV$_{nr}$. A comprehensive Monte Carlo simulation of our setup is compared to experimental data employing a Lindhard model with a free electronic energy loss $k$ and an adiabatic correction for sub-keV$_{nr}$ nuclear recoils. The best fit $k=0.179\pm 0.001$ obtained using a Monte Carlo Markov Chain (MCMC) ensemble sampler is in good agreement with previous measurements, confirming the adequacy of the Lindhard model to describe the stopping of few-keV ions in germanium crystals at a temperature of $\sim$77 K. This value of $k$ corresponds to a quenching factor of 13.7 % to 25.3 % for nuclear recoil energies between 0.3 keV$_{nr}$ and 8.5 keV$_{nr}$, respectively.
description: 7 pages, 6 figures
Exploring AGN - starburst coexistence in galaxies at z$\sim$ 0.8 by the [OIII]4959+5007/[OIII]4363 line ratio
Creators: name: Contini, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze by detailed modelling the spectra observed from the sample galaxies at z$\sim$0.8 presented by Ly et al (2015), constraining the models by the [OIII]5007+4959/[OIII]4363 line ratios. Composite models accounting for shock and photoionization by AGN or starburst are adopted. O/H are about solar for all the objects, except for a few AGN clouds with O/H= 0.3 -0.5 solar. Starburst models reproduce most of the data within the observational errors. About half of the object spectra are well fitted by an accreting AGN. Some galaxies show multiple radiation sources, such as starburst+AGN, or a double AGN.
description: 9 pages, 6 figures, accepted for publication in MNRAS
Australian trade and investment in Peninsular Malaysia : implications for Australia's food industry
Creators: name: Muthaly, Sivakumaran K.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Picosecond all-optical switching of magnetic tunnel junctions
Creators: name: Chen, Jun-Yang
name: He, Li
name: Wang, Jian-Ping
name: Li, Mo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Control of magnetism without using magnetic fields enables large-scale integration of spintronic devices for memory, computation and communication in the beyond-CMOS era. Mechanisms including spin torque transfer, spin Hall effect, and electric field or strain assisted switching have been implemented to switch magnetization in various spintronic devices. Their operation speed, however, is fundamentally limited by the spin precession time to be longer than 10-100 picoseconds. Overcoming such a speed constraint is critical for the prospective development of spintronics. Here we report the demonstration of picosecond all-optical switching of a magnetic tunnel junction (MTJ)- the building block of spintronic logic and memory -only using single telecom-band, infrared laser pulses. This first optically switchable MTJ uses ferrimagnetic GdFeCo as the free layer, and its switching is directly readout by measuring its tunneling magnetoresistance with a DR/R ratio of 0.6%. An instrument limited switching repetition rate at MHz has been demonstrated, but the fundamental limit should be higher than tens of GHz. This result represents an important step toward integrated opto-spintronic devices that combines spintronics and photonics technologies to enable ultrafast conversion between fundamental information carriers of electron spins and photons.
description: 17 pages, 4 figures
Holographic superfluid flows with a localized repulsive potential
Creators: name: Ishibashi, Akihiro
name: Maeda, Kengo
name: Okamura, Takashi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate a holographic model of superfluid flows with an external repulsive potential. When the strength of the potential is sufficiently weak, we analytically construct two steady superfluid flow solutions. As the strength of the potential is increased, the two solutions merge into a single critical solution at a critical strength, and then disappear above the critical value, as predicted by a saddle-node bifurcation theory. We also analyze the spectral function of fluctuations around the solutions under a certain decoupling approximation.
description: 10 pages, 6 figures
Women in management in Australian banks : their representation and the barriers and facilitators to their advancement to the top
Creators: name: De Carvalho Metz, Isabel
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Quantum heat traces
Creators: name: Avramidi, Ivan G
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study new invariants of elliptic partial differential operators acting on sections of a vector bundle over a closed Riemannian manifold that we call the relativistic heat trace and the quantum heat traces. We obtain some reduction formulas expressing these new invariants in terms of some integral transforms of the usual classical heat trace and compute the asymptotics of these invariants. The coefficients of these asymptotic expansion are determined by the usual heat trace coefficients (which are locally computable) as well as by some new global invariants.
description: 33 pages
Strain Effects on Oxygen Migration in Perovskites
Creators: name: Mayeshiba, Tam
name: Morgan, Dane
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Fast oxygen transport materials are necessary for a range of technologies, including efficient and cost-effective solid oxide fuel cells, gas separation membranes, oxygen sensors, chemical looping devices, and memristors. Strain is often proposed as a method to enhance the performance of oxygen transport materials, but the magnitude of its effect and its underlying mechanisms are not well-understood, particularly in the widely-used perovskite-structured oxygen conductors. This work reports on an ab initio prediction of strain effects on migration energetics for nine perovskite systems of the form LaBO3, where B = [Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Ga]. Biaxial strain, as might be easily produced in epitaxial systems, is predicted to lead to approximately linear changes in migration energy. We find that tensile biaxial strain reduces the oxygen vacancy migration barrier across the systems studied by an average of 66 meV per percent strain for a single selected hop, with a low of 36 and a high of 89 meV decrease in migration barrier per percent strain across all systems. The estimated range for the change in migration barrier within each system is approximately 25 meV per percent strain when considering all hops. These results suggest that strain can significantly impact transport in these materials, e.g., a 2% tensile strain can increase the diffusion coefficient by about three orders of magnitude at 300 K (one order of magnitude at 500 °C or 773 K) for one of the most strain-responsive materials calculated here (LaCrO3). We show that a simple elasticity model, which assumes only dilative or compressive strain in a cubic environment and a fixed migration volume, can qualitatively but not quantitatively model the strain dependence of the migration energy, suggesting that factors not captured by continuum elasticity play a significant role in the strain response.
description: (This version was completely updated regarding the correction at DOI 10.1039/C6CP90050J)
CBS News Poll: Civil Rights/Equal Opportunities/Discrimination
Creators: name: CBS News
Publisher: name: Roper Center for Public Opinion Research
Year: 2020

description: Equal opportunities (1); racial discrimination against blacks (1); progress since the 1960s (1); discrimination against African Americans (1); the 1964 Civil Rights Act, important event in U.S. history (1); discrimination based on race, color, religion, sex or national origin (1); goals of Martin Luther King and the 1960's civil rights movement (1); religious affiliation (1); personal finances (1); political party preference (1).
Redundancy Optimization of Finite-Dimensional Structures: A Concept and a Derivative-Free Algorithm
Creators: name: Kanno, Yoshihiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Redundancy is related to the amount of functionality that the structure can sustain in the worst-case scenario of structural degradation. This paper proposes a widely-applicable concept of redundancy optimization of finite-dimensional structures. The concept is consistent with the robust structural optimization, as well as the quantitative measure of structural redundancy based on the information-gap theory. A derivative-free algorithm is proposed based on the sequential quadratic programming (SQP) method, where we use the finite-difference method with adaptively varying the difference increment. Preliminary numerical experiments show that an optimal solution of the redundancy optimization problem possibly has multiple worst-case scenarios.
A multiperiod multisector general equilibrium model of the Australian economy
Creators: name: Meagher, Gerald Anthony
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Prompt planetesimal formation beyond the snow line
Creators: name: Armitage, Philip J.
name: Eisner, Josh A.
name: Simon, Jacob B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We develop a simple model to predict the radial distribution of planetesimal formation. The model is based on the observed growth of dust to mm-sized particles, which drift radially, pile-up, and form planetesimals where the stopping time and dust-to-gas ratio intersect the allowed region for streaming instability-induced gravitational collapse. Using an approximate analytic treatment, we first show that drifting particles define a track in metallicity--stopping time space whose only substantial dependence is on the disk's angular momentum transport efficiency. Prompt planetesimal formation is feasible for high particle accretion rates (relative to the gas, $\dot{M}_p / \dot{M} > 3 \times 10^{-2}$ for $α= 10^{-2}$), that could only be sustained for a limited period of time. If it is possible, it would lead to the deposition of a broad and massive belt of planetesimals with a sharp outer edge. Including turbulent diffusion and vapor condensation processes numerically, we find that a modest enhancement of solids near the snow line occurs for cm-sized particles, but that this is largely immaterial for planetesimal formation. We note that radial drift couples planetesimal formation across radii in the disk, and suggest that considerations of planetesimal formation favor a model in which the initial deposition of material for giant planet cores occurs well beyond the snow line.
description: ApJ Letters, in press
Elixir-SE — the Swedish node
Creators: name: Persson, Bengt
name: Viklund, Johan
name: Lantz, Henrik
name: Jareborg, Niclas
name: Hagberg, Jonas
name: Lindvall, Jessica
name: Levander, Fredrik
name: Lindberg, Jessica
name: Feilitzen, Kalle Von
name: Oksvold, Per
name: Freyhult, Pontus
name: Kähäri, Andreas
name: Norling, Martin
name: Nanjiang  Shu
name: Novella, Jon Ander
name: Bampalikis, Dimitrios
name: Kallberg, Yvonne
name: Kronander, Elin
name: Anton, Mihail
name: Pierre-Etienne  Cholley
name: Robinson, Jonathan L.
name:  L. Thomas  Svensson
name: Nystedt, Björn
Publisher: name: F1000 Research Limited
Year: 2020

description: NBIS (National Bioinformatics Infrastructure Sweden), forming the SciLifeLab Bioinformatics platform, provides bioinformatics support, infrastructure and advanced training to the Swedish research community. NBIS is a distributed infrastructure formed as a consortium of major Swedish universities with staff placed at all sites. NBIS currently has ~80 staff and constitutes the Elixir-SE node.

Sweden has been active since the start of ELIXIR, contributing with the ELIXIR Core Data Resource Human Protein Atlas and its integration into the ELIXIR landscape. ELIXIR-SE is also working on the Metabolic Atlas, development of Federated EGA, and data managmenet within ELIXIR-CONVERGE. Additional activities follow in the new Elixir 2019–23 programme.
Dendrimer Assisted Dispersion of Carbon Nanotubes: A Molecular Dynamics Study
Creators: name: Pramanik, Debabrata
name: Maiti, Prabal K
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Various unique physical, chemical, mechanical and electronic properties of carbon nanotube (CNT) make it very useful materials for diverse potential application in many fields. Experimentally synthesized CNTs are generally found in bundle geometry with a mixture of different chirality and present a unique challenge to separate them. In this paper we have proposed the PAMAM dendrimer to be an ideal candidate for this separation. To estimate efficiency of the dendrimer in dispersion of CNTs from the bundle geometry, we have calculated potential of mean forces (PMF). Our PMF study of two dendrimer wrapped CNTs shows lesser binding affinity compared to the two bare CNTs. PMF study shows that the binding affinity decreases for non-protonated dendrimer and for the protonated case, the interaction is fully repulsive in nature. For both the non-protonated as well as protonated cases, the PMF increases with increasing dendrimer generations from 2 to 4 gradually compare to the bare PMF. We have performed PMF calculations with (6,5) and (6,6) chirality to study the chirality dependence of PMF. Calculated PMF for protonated dendrimer wrapped chiral CNTs is more compared to the protonated dendrimer wrapped armchair CNTs for all the generations studied. However, for non-protonated dendrimer wrapped CNTs such chirality dependence is not very prominent. Our study suggests that the dispersion efficiency of protonated dendrimer is more compared to the non-protonated dendrimer and can be used as an effective dispersing agent in dispersion of CNT from the bundle geometry.
description: 22 pages, 8 figures
Australia-India trade : 1950 to 1997
Creators: name: Mathur, Shalini
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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title: Fall, Repetition and Freedom revisited: 'Taking Notice' of religious themes in Kierkegaard's aesthetic writings with references to St. Augustine, Kant and Schelling
Creators: name: Tsariki, Vasiliki
Publisher: name: Goldsmiths, University of London
Year: 2003

description: This thesis explores the interrelationship between the notions of the Fall, repetition and freedom with references to the writings of Kierkegaard and secondarily those of Kant, St. Augustine and Schelling. Kierkegaard's aesthetic texts and his concept of 'taking notice' are the indispensable background to the question of the different possible interpretations in regard of the relation between these three concepts. This primary interest is furthermore linked to an investigation of the emergence of different aspects of human singularity and of the divine that arguably emerge alongside each one of the different interpretations. The thesis consists of four chapters, the first and last on Kierkegaard, the second on St. Augustine and Kant and the third on Schelling. The first chapter investigates the place of the concept of anxiety in Kierkegaard's oeuvre, discussing at the same time his understanding of time, freedom and the fall through his appropriation of the story of Adam. Particular attention is paid to a discussion of the author's subsequent call to 'take notice' of the importance of the possibility of a distinction between a time before and a time after the Fall. This paves the ground for the second chapter, which is an investigation of St. Augustine's radical distinction between the time before and after the Fall and Kant's account of the Fall and the unfolding of history. The third chapter discusses the possibility of postulating some sort of continuity between the two modes of time mentioned above through an interpretation of Schelling's treatment of divine and human freedom, time, history and repetition. In the fourth chapter, Schelling's elaborations on time, freedom and contemporaneity provide the ground for a reinterpretation of Kierkegaard's insights on repetition, faith and contemporaneity. This discussion is primarily conducted through a revaluation of three biblical motifs, namely Job's ordeal, Abraham's sacrifice and the coming into existence of the God-man. These narratives are instrumental in allowing us to 'take notice' of the articulation between the notions of Freedom, repetition and the Fall emerging from Kierkegaard's aesthetic writings.
Schottky groups and maximal representations
Creators: name: Burelle, Jean-Philippe
name: Treib, Nicolaus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We describe a construction of Schottky type subgroups of automorphism groups of partially cyclically ordered sets. We apply this construction to the Shilov boundary of a Hermitian symmetric space and show that in this setting Schottky subgroups correspond to maximal representations of fundamental groups of surfaces with boundary. As an application, we construct explicit fundamental domains for the action of maximal representations into $\mathrm{Sp}(2n,\mathbb{R})$ on $\mathbb{RP}^{2n-1}$.
description: 21 pages, 4 figures
Collapse of the $Gd^{3+}$ ESR fine structure throughout the coherent temperature of the Gd-doped Kondo Semiconductor $CeFe_{4}P_{12}$
Creators: name: Venegas, P. A.
name: Garcia, F. A.
name: Garcia, D. J.
name: Cabrera, G.
name: Avila, M. A.
name: Rettori, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Experiments on the $Gd^{3+}$ Electron Spin Resonance (ESR) in the filled skutterudite $Ce_{1-x}Gd_{x}Fe_{4}P_{12}$ ($x \approx 0.001$), at temperatures where the host resistivity manifests a smooth insulator-metal crossover, provides evidence of the underlying Kondo physics associated with this system. At low temperatures (below $T \approx K$), $Ce_{1-x}Gd_{x}Fe_{4}P_{12}$ behaves as a Kondo-insulator with a relatively large hybridization gap, and the $Gd^{3+}$ ESR spectra displays a fine structure with lorentzian line shape, typical of insulating media. The electronic gap is attributed to the large hybridization present in the coherent regime of a Kondo lattice, when Ce 4f-electrons cooperate with band properties at half-filling. Mean-field calculations suggest that the electron-phonon interaction is fundamental at explaining the strong 4f-electron hybridization in this filled skutterudite. The resulting electronic structure is strongly temperature dependent, and at about $T^{*} \approx 160 K$ the system undergoes an insulator-to-metal transition induced by the withdrawal of 4f-electrons from the Fermi volume, the system becoming metallic and non-magnetic. The $Gd^{3+}$ ESR fine structure coalesces into a single dysonian resonance, as in metals. Still, our simulations suggest that exchange-narrowing via the usual Korringa mechanism, alone, is not capable of describing the thermal behavior of the ESR spectra in the entire temperature region ($4.2$ - $300$ K). We propose that temperature activated fluctuating-valence of the Ce ions is the missing ingredient that, added to the usual exchange-narrowing mechanism, fully describes this unique temperature dependence of the $Gd^{3+}$ ESR fine structure observed in $Ce_{1-x}Gd_{x}Fe_{4}P_{12}$.
description: 19 pages, 6 figures
Superconformal Algebraic Approach to Hadron Structure
Creators: name: de Teramond, Guy F.
name: Brodsky, Stanley J.
name: Deur, Alexandre
name: Dosch, Hans Gunter
name: Sufian, Raza Sabbir
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Fundamental aspects of nonperturbative QCD dynamics which are not obvious from its classical Lagrangian, such as the emergence of a mass scale and confinement, the existence of a zero mass bound state, the appearance of universal Regge trajectories and the breaking of chiral symmetry are incorporated from the onset in an effective theory based on superconformal quantum mechanics and its embedding in a higher dimensional gravitational theory. In addition, superconformal quantum mechanics gives remarkable connections between the light meson and nucleon spectra. This new approach to hadron physics is also suitable to describe nonperturbative QCD observables based on structure functions, such as GPDs, which are not amenable to a first-principle computation. The formalism is also successful in the description of form factors, the nonperturbative behavior of the strong coupling and diffractive processes. We also discuss in this article how the framework can be extended rather successfully to the heavy-light hadron sector.
description: Invited talk presented at XII Quark Confinement and the Hadron Spectrum, 29 August to 3 September 2016, Thessaloniki, Greece
Automatically tracking neurons in a moving and deforming brain
Creators: name: Nguyen, Jeffrey P.
name: Linder, Ashley N.
name: Plummer, George S.
name: Shaevitz, Joshua W.
name: Leifer, Andrew M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Advances in optical neuroimaging techniques now allow neural activity to be recorded with cellular resolution in awake and behaving animals. Brain motion in these recordings pose a unique challenge. The location of individual neurons must be tracked in 3D over time to accurately extract single neuron activity traces. Recordings from small invertebrates like C. elegans are especially challenging because they undergo very large brain motion and deformation during animal movement. Here we present an automated computer vision pipeline to reliably track populations of neurons with single neuron resolution in the brain of a freely moving C. elegans undergoing large motion and deformation. 3D volumetric fluorescent images of the animal's brain are straightened, aligned and registered, and the locations of neurons in the images are found via segmentation. Each neuron is then assigned an identity using a new time-independent machine-learning approach we call Neuron Registration Vector Encoding. In this approach, non-rigid point-set registration is used to match each segmented neuron in each volume with a set of reference volumes taken from throughout the recording. The way each neuron matches with the references defines a feature vector which is clustered to assign an identity to each neuron in each volume. Finally, thin-plate spline interpolation is used to correct errors in segmentation and check consistency of assigned identities. The Neuron Registration Vector Encoding approach proposed here is uniquely well suited for tracking neurons in brains undergoing large deformations. When applied to whole-brain calcium imaging recordings in freely moving C. elegans, this analysis pipeline located 150 neurons for the duration of an 8 minute recording and consistently found more neurons more quickly than manual or semi-automated approaches.
description: 33 pages, 7 figures, code available
Trotter-type formula for operator semigroups on product spaces
Creators: name: Stephan, Artur
Publisher: name: Weierstrass Institute
Year: 2023
Subjects: subject: Strongly continuous semigroups of linear operators
subject: split-step method
subject: Trotter-product formula
subject: time discretization
subject: product space
subject: tensor space
subject: block operator matrices
subject: operator-norm convergence rate estimate
subject: inhomogeneous abstract Cauchy problems
subject: 47D06
subject: 15A60

description: We consider a Trotter-type-product formula for approximating the solution of a linear abstract Cauchy problem (given by a strongly continuous semigroup), where the underlying Banach space is a product of two spaces. In contrast to the classical Trotter-product formula, the approximation is given by freezing subsequently the components of each subspace. After deriving necessary stability estimates for the approximation, which immediately provide convergence in the natural strong topology, we investigate convergence in the operator norm. The main result shows that an almost optimal convergence rate can be established if the dominant operator generates a holomorphic semigroup and the off-diagonal coupling operators are bounded.
Prototyping the graphical user interface for the operator of the Cherenkov Telescope Array
Creators: name: Sadeh, Iftach
name: Oya, Igor
name: Schwarz, Joseph
name: Pietriga, Emmanuel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Cherenkov Telescope Array (CTA) is a planned gamma-ray observatory. CTA will incorporate about 100 imaging atmospheric Cherenkov telescopes (IACTs) at a Southern site, and about 20 in the North. Previous IACT experiments have used up to five telescopes. Subsequently, the design of a graphical user interface (GUI) for the operator of CTA involves new challenges. We present a GUI prototype, the concept for which is being developed in collaboration with experts from the field of Human-Computer Interaction. The prototype is based on Web technology; it incorporates a Python web server, Web Sockets and graphics generated with the d3.js Javascript library.
Coherent structure extraction in turbulent channel flow using boundary adapted wavelets
Creators: name: Sakurai, Teluo
name: Yoshimatsu, Katsunori
name: Schneider, Kai
name: Farge, Marie
name: Morishita, Koji
name: Ishihara, Takashi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76F40, 76F65, 65T60

description: We present a construction of isotropic boundary adapted wavelets, which are orthogonal and yield a multi-resolution analysis. We analyze direct numerical simulation data of turbulent channel flow computed at a friction Reynolds number of 395, and investigate the role of coherent vorticity. Thresholding of the vorticity wavelet coefficients allows to split the flow into two parts, coherent and incoherent vorticity. The coherent vorticity is reconstructed from their few intense wavelet coefficients. The statistics of the coherent part, i.e., energy and enstrophy spectra, are close to the statistics of the total flow, and moreover, the nonlinear energy budgets are very well preserved. The remaining incoherent part, represented by the large majority of the weak wavelet coefficients, corresponds to a structureless, i.e., noise-like, background flow whose energy is equidistributed.