cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A First Look at OpenFlow Control Plane Behavior from a Test Deployment
Creators: name: Levin, Dan
name: Wundsam, Andreas
name: Feldmann, Anja
name: Seetharaman, Srini
name: Kobayashi, Masayoshi
name: Parulkar, Guru
Publisher: name: Technische Universität Berlin
Year: 2011
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: OpenFlow
subject: control plane traffic
subject: measurement

description: OpenFlow is widely being deployed across campuses in the US, Europe, and Asia. However, little is known about the performance and traffic characteristics of such networks in practice. In this paper, we present preliminary behavior and performance observations made from traffic collected at the Stanford experimental OpenFlow network, the first deployment of its kind operating with user-generated traffic. We base our study on OpenFlow control plane traffic and data plane measurements, collected over multiple weeks. We find that control plane traffic, while typically low, can, at times, make up a significant portion of overall network traffic. We observe that the flow arrival rate has a large impact on network performance. Finally, we identify several tradeoffs and practical limitations in network measurement and monitoring approaches enabled by OpenFlow.
Quenched Magnon excitations by oxygen sublattice reconstruction in (SrCuO$_2$)$_n$/(SrTiO$_3$)$_2$ superlattices
Creators: name: Dantz, M.
name: Pelliciari, J.
name: Samal, D.
name: Bisogni, V.
name: Huang, Y.
name: Olalde-Velasco, P.
name: Strocov, V. N.
name: Koster, G.
name: Schmitt, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The recently discovered structural reconstruction in the cuprate superlattice (SrCuO$_2$)$_n$/(SrTiO$_3$)$_2$ has been investigated across the critical value of $n=5$ using resonant inelastic x-ray scattering (RIXS). We find that at the critical value of $n$, the cuprate layer remains largely in the bulk-like two-dimensional structure with a minority of Cu plaquettes being reconstructed. The partial reconstruction leads to quenching of the magnons starting at the $Γ$-point due to the minority plaquettes acting as scattering points. Although comparable in relative abundance, the doped charge impurities in electron-doped cuprate superconductors do not show this quenching of magnetic excitations.
description: Accepted for publication in Scientific Reports
Expert-Agnostic Ultrasound Image Quality Assessment using Deep Variational Clustering
Creators: name: Raina, Deepak
name: Ntentia, Dimitrios
name: Chandrashekhara, SH
name: Voyles, Richard
name: Saha, Subir Kumar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Ultrasound imaging is a commonly used modality for several diagnostic and therapeutic procedures. However, the diagnosis by ultrasound relies heavily on the quality of images assessed manually by sonographers, which diminishes the objectivity of the diagnosis and makes it operator-dependent. The supervised learning-based methods for automated quality assessment require manually annotated datasets, which are highly labour-intensive to acquire. These ultrasound images are low in quality and suffer from noisy annotations caused by inter-observer perceptual variations, which hampers learning efficiency. We propose an UnSupervised UltraSound image Quality assessment Network, US2QNet, that eliminates the burden and uncertainty of manual annotations. US2QNet uses the variational autoencoder embedded with the three modules, pre-processing, clustering and post-processing, to jointly enhance, extract, cluster and visualize the quality feature representation of ultrasound images. The pre-processing module uses filtering of images to point the network's attention towards salient quality features, rather than getting distracted by noise. Post-processing is proposed for visualizing the clusters of feature representations in 2D space. We validated the proposed framework for quality assessment of the urinary bladder ultrasound images. The proposed framework achieved 78% accuracy and superior performance to state-of-the-art clustering methods.
description: Accepted in IEEE International Conference on Robotics and Automation (ICRA) 2023
Design and analysis of electrothermal metasurfaces
Creators: name: Liu, Xiu
name: Li, Zhuo
name: Wang, Zexiao
name: Yun, Hyeong Seok
name: Shen, Sheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Electrothermal metasurfaces have attracted extensive attention due to their ability to dynamically control thermal infrared radiation. Although previous studies were mainly focused on the metasurfaces with infinite unit cells, the finite-size effect can be a critical design factor for developing thermal metasurfaces with fast response and broad temperature uniformity in practice. Here, we study the thermal metasurfaces consisting of gold nanorods with a finite array size, which, with only several periods, can achieve a resonance close to that of the infinite case. More importantly, such a small footprint due to the finite array size results in the response time down to a nanosecond level. Furthermore, the number of the unit cells in the direction perpendicular to the axis of the nanorods is found to be insensitive to the resonance and response time, thus providing a tunability in aspect ratio that can boost the temperature uniformity in the sub-Kelvin level.
description: 14 pages, 5 figures
Coherent vs. measurement-based feedback for controlling a single qubit
Creators: name: Balouchi, Ashkan
name: Jacobs, Kurt
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We compare the performance of continuous coherent feedback, implemented using an ideal single-qubit controller, to that of continuous measurement-based feedback for the task of controlling the state of a single qubit. Here the basic dynamical resource is the ability to couple the system to a traveling-wave field (for example, a transmission line) via a system observable, and the fundamental limitation is the maximum rate that is available for this coupling. We focus on the question of the best achievable control given ideal controllers. To obtain a fair comparison we acknowledge that the amplification involved in measurement-based control allows the controller to use macroscopic fields to apply feedback forces to the system, so it is natural to allow these feedback forces to be much larger than the mesoscopic coupling to the transmission line that mediates both the measurement for measurement-based control and the coupling to the mesoscopic controller for coherent control. Interestingly our numerical results indicate that under the above platform for comparison, coherent feedback is able to exactly match the performance of measurement-based feedback given ideal controllers. We also discuss various properties of, and control mechanisms for, coherent feedback networks.
description: 12 pages, 6 png figures, Revtex4
The interaction between a ruling elite and an externally promoted policy reform agenda: the case of forestry under the second Kingdom of Cambodia 1993-2003
Creators: name: Cock, Andrew Robert
Publisher: name: La Trobe
Year: 2023

description: Restrictions: Thesis unavailable.

Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Social Sciences, Faculty of Humanities and Social Sciences, La Trobe University, Bundoora.
Approximation Algorithms for Directed Weighted Spanners
Creators: name: Grigorescu, Elena
name: Kumar, Nithish
name: Lin, Young-San
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: In the pairwise weighted spanner problem, the input consists of an $n$-vertex-directed graph, where each edge is assigned a cost and a length. Given $k$ vertex pairs and a distance constraint for each pair, the goal is to find a minimum-cost subgraph in which the distance constraints are satisfied. This formulation captures many well-studied connectivity problems, including spanners, distance preservers, and Steiner forests. In the offline setting, we show: 1. An $\tilde{O}(n^{4/5 + ε})$-approximation algorithm for pairwise weighted spanners. When the edges have unit costs and lengths, the best previous algorithm gives an $\tilde{O}(n^{3/5 + ε})$-approximation, due to Chlamtáč, Dinitz, Kortsarz, and Laekhanukit (TALG, 2020). 2. An $\tilde{O}(n^{1/2+ε})$-approximation algorithm for all-pair weighted distance preservers. When the edges have unit costs and arbitrary lengths, the best previous algorithm gives an $\tilde{O}(n^{1/2})$-approximation for all-pair spanners, due to Berman, Bhattacharyya, Makarychev, Raskhodnikova, and Yaroslavtsev (Information and Computation, 2013). In the online setting, we show: 1. An $\tilde{O}(k^{1/2 + ε})$-competitive algorithm for pairwise weighted spanners. The state-of-the-art results are $\tilde{O}(n^{4/5})$-competitive when edges have unit costs and arbitrary lengths, and $\min\{\tilde{O}(k^{1/2 + ε}), \tilde{O}(n^{2/3 + ε})\}$-competitive when edges have unit costs and lengths, due to Grigorescu, Lin, and Quanrud (APPROX, 2021). 2. An $\tilde{O}(k^ε)$-competitive algorithm for single-source weighted spanners. Without distance constraints, this problem is equivalent to the directed Steiner tree problem. The best previous algorithm for online directed Steiner trees is $\tilde{O}(k^ε)$-competitive, due to Chakrabarty, Ene, Krishnaswamy, and Panigrahi (SICOMP, 2018).
Yarkovsky V-shape identification of asteroid families
Creators: name: Bolin, Bryce T.
name: Delbo, Marco
name: Morbidelli, Alessandro
name: Walsh, Kevin J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: There are only a few known main belt (MB) asteroid families with ages greater than 2 Gyr (Brož et al. 2013, Spoto et al. 2015). Estimates based on the family producing collision rate suggest that the lack of >2 Gyr-old families may be due to a selection bias in current techniques used to identify families. Family fragments disperse in their orbital elements, semi-major axis, $a$, eccentricity, $e$, and inclination, $i$, due to secular resonances, close encounters with massive asteroids and the non-gravitational Yarkovsky force. This causes the family fragments to be indistinguishable from the background of the main belt making them more difficult to identify with the hierarchical clustering method (HCM) with increasing family age. The discovery of the Eulalia and new Polana families in the inner belt relied on new techniques because Yarkovsky spreading made them too disperse to be identified using the classical HCM. The technique used to discover the new Polana and Eulalia families is modified to identify asteroid families by searching for correlations between $a$ and asteroid diameter, $D$, or absolute magnitude, $H$. A group of asteroids is identified as a collisional family if its boundary in the $a$ vs. 1/$D$ or $a$ vs. $H$ planes has a characteristic V-shape which is due to the size dependent Yarkovsky spreading. The V-shape boundary is identified with two separate techniques. The first identifies a border by measuring the drop between the number of objects inside and outside of the border. The second identifies the V-shape border by measuring the number density of objects in $a$ vs. 1/$D$,$H$ space. The V-shape techniques are demonstrated on known families Erigone, Vesta, Koronis, and families difficult to identify by HCM such as Flora, Baptistina, new Polana, Eulalia and Karin. Application of the technique in a search for >2 Gyr-old families throughout the MB is discussed.
description: 74 pages, 17 figures, accepted for publication in Icarus
IP Geolocation Databases: Unreliable?
Creators: name: Poese, Ingmar
name: Kaafar, Mohamed Ali
name: Donnet, Benoit
name: Gueye, Bamba
name: Uhlig, Steve
Publisher: name: Technische Universität Berlin
Year: 2011
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: IP geolocation
subject: accuracy
subject: reliability

description: The most widely used technique for IP geolocation consists in building a database to keep the mapping between IP blocks and a geographic location. Several databases are available and are frequently used by many services and web sites in the Internet. Contrary to widespread belief, geolocation databases are far from being as reliable as they claim. In this paper, we conduct a comparison of several current geolocation databases -both commercial and free- to understand the limitations in their usability. First, the vast majority of entries in the databases refer only to a few popular countries (e.g., U.S.). This creates an imbalance in the representation of countries across the IP blocks of the databases. Second, these entries do not reflect the original allocation of IP blocks, nor BGP announcements. In addition, we quantify the accuracy of geolocation databases on a large European ISP based on ground truth information, as well as on two tier-1 ISPs based on DNS names containing geographic clues. This is the first study using a ground truth showing that the overly fine granularity of database entries makes their accuracy worse, not better. Their blocks, often as fine as /29 prefixes, have geolocations inaccurate by hundreds of kilometers in a significant fraction of the cases. All in all, geolocation databases can claim country-level accuracy, but certainly not city-level.
Towards a new generalized space expansion dynamics applied to the rotation of galaxies and Tully Fisher law
Creators: name: Fleuret, Jacques
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Up to now, the rotational velocities of galaxies are not clearly understood and the experimental Tully Fisher rule, linking the total galactic mass to the fourth power of the velocity, through an acceleration coefficient of about 10-10 m/s2 has not found a deep theoretical explanation. Tentative proposals (MOND theory of a modified Newton s law and extraneous dark matter) do not bring a definite clarification. We propose here a new approach to this problem, without exotic matter and using the classical Newton force. But we introduce a new additional universal acceleration, which could represent a universal expansion law valid at the scale level of a galaxy. We show that this hypothesis leads to a good description of the observed variations of the galactic transverse velocity. It can be considered as a consequence of the Scale Expansion Cosmos theory (SEC) introduced by J. Masreliez, but we postulate that the space expansion acceleration universally applies at any scale. We obtain a formal derivation of the Tully Fisher law, linking the constant galactic transverse velocity to its total mass, via the universal minimum acceleration. We derive a good estimate of the TF acceleration coefficient and show that expansion should be proportional to the square root of the local volumic mass density. Our conjecture is in fact a new dynamics principle which could be applied to many other physical problems at different scales. Applying it to the range of the solar planet system confirms the well known Kepler laws, at least as a valid approximation for the order of magnitude of the solar system.
Photometric Redshifts for Next-Generation Surveys
Creators: name: Newman, Jeffrey A.
name: Gruen, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Photometric redshifts are essential in studies of both galaxy evolution and cosmology, as they enable analyses of objects too numerous or faint for spectroscopy. The Rubin Observatory, Euclid, and Roman Space Telescope will soon provide a new generation of imaging surveys with unprecedented area coverage, wavelength range, and depth. To take full advantage of these datasets, further progress in photometric redshift methods is needed. In this review, we focus on the greatest common challenges and prospects for improvement in applications of photo-$z$'s to the next generation of surveys: - Gains in $performance$ -- i.e., the precision of redshift estimates for individual galaxies -- could greatly enhance studies of galaxy evolution and some probes of cosmology. - Improvements in $characterization$ -- i.e., the accurate recovery of redshift $distributions$ of galaxies in the presence of uncertainty on individual redshifts -- are urgently needed for cosmological measurements with next-generation surveys. - To achieve both of these goals, improvements in the scope and treatment of the samples of spectroscopic redshifts which make high-fidelity photo-$z$'s possible will also be needed. For the full potential of the next generation of surveys to be reached, the characterization of redshift distributions will need to improve by roughly an order of magnitude compared to the current state of the art, requiring progress on a wide variety of fronts. We conclude by presenting a speculative evaluation of how photometric redshift methods and the collection of the necessary spectroscopic samples may improve by the time near-future surveys are completed.
description: Posted with permission from the Annual Review of Astronomy and Astrophysics, Volume 60, copyright 2022 Annual Reviews, http://www.annualreviews.org/
Photometric observations of flares on AD Leo from GWAC-F30 and TESS
Creators: name: Bai, Jian-Ying
name: Wang, Jing
name: Li, Hua-Li
name: Xin, Li-Ping
name: Li, Guang-Wei
name: Yang, Yuan-Gui
name: Wei, Jian-Yan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We observed active M dwarf star AD Leo for 146 hr in photometry by GWAC-F30 and also analyzed 528-hr photometric data of the star from TESS. A total of 9 and 70 flares are detected from GWAC-F30 and TESS, respectively. Flare durations, amplitudes and energies are calculated. The distributions of the three properties and FFDs are given. Within the same energy range of flares, the FFDs of AD Leo obtained in this research and the previous study are basically consistent, which suggests that the magnetic activity of this star has not significantly changed compared to that decades ago. Comparing with the average FFD of M-type stars, AD Leo's FFD is twice higher, indicating that its magnetic activity is more active than that of the average level of the M-type. Based on TESS light curve, AD Leo's rotation period is calculated as 2.21${+0.01 \choose -0.01}$ day , supporting the result given in previous research. During the decay phase of the most energetic flare from TESS, we identified QPPs and determined a 26.5-min oscillation period, which is currently the longest period for AD Leo, suggesting that long periodic physical process existed during flare of this star.
Scale-Invariant Survival Probability at Eigenstate Transitions
Creators: name: Hopjan, Miroslav
name: Vidmar, Lev
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Understanding quantum phase transitions in highly excited Hamiltonian eigenstates is currently far from being complete. It is particularly important to establish tools for their characterization in time domain. Here we argue that a scaled survival probability, where time is measured in units of a typical Heisenberg time, exhibits a scale-invariant behavior at eigenstate transitions. We first demonstrate this property in two paradigmatic quadratic models, the one-dimensional Aubry-Andre model and three-dimensional Anderson model. Surprisingly, we then show that similar phenomenology emerges in the interacting avalanche model of ergodicity breaking phase transitions. This establishes an intriguing similarity between localization transition in quadratic systems and ergodicity breaking phase transition in interacting systems.
Teacher perceptions and classroom behaviours : an intervention
Creators: name: Robson, Maurice Gordon
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.
Vector dark matter in supercooled Higgs portal models
Creators: name: Frandsen, Mads T.
name: Heikinheimo, Matti
name: Thing, Mattias E.
name: Tuominen, Kimmo
name: Rosenlyst, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider extensions of the Standard Model by a hidden sector consisting of a gauge field coupled with a scalar field. Assuming the absence of dimensionful parameters in the tree level potential, radiative symmetry breaking will make the hidden sector gauge field massive and induce the electroweak scale of the Standard Model. We consider separately dark sector gauge groups $U(1)_{\rm{D}}$ and $SU(2)_{\rm{D}}$, and focus on probing the models with a combination of direct detection experiments and gravitational wave observatories. We find that recent dark matter direct detection results significantly constrain the parameter space of the models where they can account for the observed dark matter relic density via freeze-out. The gravitational wave signals originating from strongly first order electroweak phase transition in these models can be probed in future gravitational wave observatories such as the Laser Interferometer Space Antenna. We show how the projected results compliment direct detection experiments and can help probe parameter space near the neutrino floor of direct detection.
description: 20 pages, 5 figures
Superposed periodic kink and pulse solutions of coupled nonlinear equations
Creators: name: Khare, Avinash
name: Banerjee, Saikat
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present novel previously unexplored periodic solutions, expressed in terms of Jacobi elliptic functions, for both a coupled $ϕ^4$ model and a coupled nonlinear Schrödinger equation (NLS) model. Remarkably, these solutions can be elegantly reformulated as a linear combination of periodic kinks and antikinks, or as a combination of two periodic kinks or two periodic pulse solutions. However, we also find that for $m=0$ and a specific value of the periodicity (or at a nonzero value of the elliptic modulus $m$) this superposition does not hold. These results demonstrate that the notion of superposed solutions extends to the coupled nonlinear equations as well.
description: Final published version
(Un)making the good woman: the process of resilience development and recovery to end partner violence
Creators: name: Pinnewala, Parvani
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Women's agency in resolving partner violence (PV) is well documented. However, empirical, theoretical, and clinical understandings of PV in South Asia in general, and Sri Lanka in particular, are limited. This is the first in-depth investigation into women's help-seeking, coping, and social support in the context of PV in Sri Lanka. Its primary aim is to examine women's coping strategies and support systems in ending violence, whilst developing a theory for women's responses to PV. Insofar as it links these variables in a single study, and attempts to develop a theory of resilience in the face of PV, this investigation is also the first of its kind for South Asia. Women's process of responding to PV is examined using a representative sample of types of PV, relationships, PV experiences, help-seeking, and socio-demographics. -- Eighty-four participants accessing crisis centres and hospital desks were selected. The mixed methods design included questionnaires and interviews. For analysis, qualitative grounded theory was employed, backed by quantitative analysis of the constructs examined. -- The main contribution is a theory developed to explain the process of women's responses to PV. The theory encapsulates the process of resilience development and recovery in responding to PV. It demonstrates that responses to violence occur as a non-linear, five-stage process, with regressions in most stages. The theory posits that critical incidents and turning points facilitate moments of insight leading to insight-mediated personality changes and to progression through the stages. It also demonstrates that participants employ increased resilience to transform themselves, the PV, and the culture they occupy. The theory also demonstrates that coping, support seeking and support giving occur as non-linear processes, whilst cognitive development and women's development of agency occur as linear processes. The findings support the study's hypotheses by demonstrating that various coping strategies (problem and emotion focused) and support systems (informal and formal) are necessary for ending PV. The study identified the critical roles of socio-cultural factors as obstacles, and children as essential support givers, for women's agency in ending PV. Besides contributing theoretically and empirically to several research domains, this study also addresses serviceprovision needs of help-seeking women.
Probing the influence of dielectric environment on excitons in monolayer WSe2: Insight from high magnetic fields
Creators: name: Stier, Andreas V.
name: Wilson, Nathan P.
name: Clark, Genevieve
name: Xu, Xiaodong
name: Crooker, Scott A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Excitons in atomically-thin semiconductors necessarily lie close to a surface, and therefore their properties are expected to be strongly influenced by the surrounding dielectric environment. However, systematic studies exploring this role are challenging, in part because the most readily accessible exciton parameter -- the exciton's optical transition energy -- is largely \textit{un}affected by the surrounding medium. Here we show that the role of the dielectric environment is revealed through its systematic influence on the \textit{size} of the exciton, which can be directly measured via the diamagnetic shift of the exciton transition in high magnetic fields. Using exfoliated WSe$_2$ monolayers affixed to single-mode optical fibers, we tune the surrounding dielectric environment by encapsulating the flakes with different materials, and perform polarized low-temperature magneto-absorption studies to 65~T. The systematic increase of the exciton's size with dielectric screening, and concurrent reduction in binding energy (also inferred from these measurements), is quantitatively compared with leading theoretical models. These results demonstrate how exciton properties can be tuned in future 2D optoelectronic devices.
description: 7 pages, 4 figures
Synthesis and characterization of high performance aliphatic polyurea composites for corrosion protection
Creators: name: PALANIANDY, KHANISYA
Publisher: name: Monash University
Year: 2023
Subjects: Optical properties of materials
Physical properties of materials
Structure and dynamics of materials
Sustainable design
Polymers and plastics

description: The success in developing high performance material lies in deep mastery of the interplay between the material’s constituents. This thesis establishes the relationship between key components in polyurea and the resultant strength, flexibility, and time-dependent properties. Thorough investigations on the effect of integrating nano- and micro-sized reinforcing particles on the material performance are detailed. As a result, a high performance aliphatic polyurea nanocomposite with excellent corrosion protection and high durability in saline environment is developed. The findings of this thesis provide valuable insights for the design of high-performance industrial coatings.
Electronic Circuit Analog of Synthetic Genetic Networks: Revisited
Creators: name: Hellen, Edward H.
name: Dana, Syamal K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Electronic circuits are useful tools for studying potential dynamical behaviors of synthetic genetic networks. The circuit models are complementary to numerical simulations of the networks, especially providing a framework for verification of dynamical behaviors in the presence of intrinsic and extrinsic noise of the electrical systems. Here we present an improved version of our previous design of an electronic analog of genetic networks that includes the 3-gene Repressilator and we show conversions between model parameters and real circuit component values to mimic the numerical results in experiments. Important features of the circuit design include the incorporation of chemical kinetics representing Hill function inhibition, quorum sensing coupling, and additive noise. Especially, we make a circuit design for a systematic change of initial conditions in experiment, which is critically important for studies of dynamical systems' behavior, particularly, when it shows multistability. This improved electronic analog of the synthetic genetic network allows us to extend our investigations from an isolated Repressilator to coupled Repressilators and to reveal the dynamical behavior's complexity.
description: 21 pages, 13 figures
Looking for good practice and optimal services for youth facing homelessness with complex care needs and high risk or challenging behaviour
Creators: name: Owen, Lloyd
Publisher: name: La Trobe
Year: 2023

description: This study employed qualitative research methodology informed by the grounded theory tradition to explore good practice and optimal services for young people presenting with complex care needs associated with challenging or high risk behaviour. Indepth interviews were conducted in three waves of data collection and analysis with fourteen experienced practitioners whose careers have included sustained periods of work with this group in a number of selected Victorian service systems. The principal vantage point was the interface between the supported accommodation and assistance programs for homeless young people, statutory child protection and care, placement and support programs for young people at risk and juvenile justice programs for young offenders. The nature of the problem necessarily included some consideration of mental health and services dealing with substance abuse. The findings propose a view of good practice giving emphasis to the accessible and assertive presence of a responsible adult to "be there" fostering relationships and skilled purposive intervention. Intervention should be planned, holistic, sensitive and responsive to particular needs. It provides active unconditional care. It attends to attachment and trauma concerns and works with short run goals and a long term perspective. Intervention is sustained until constructive disengagement can occur. The complexity and challenge in the task of helping hurt youth warrants the support, strength and guidance of a multi-skilled team. Ideally the team will be described using normative terms. Optimal services are timely, congruent, seamless and robust in capacity to nurture, establish boundaries and meet developmental and therapeutic requirements. They should be connected to a community and there for as long as it takes, with ready access to suitable accommodation, purchasing power and flexibility of operation. To the greatest extent possible solutions are generated in the place where help is sought. Voluntary service commitment lasts till personal capacity and natural networks take over.
Search for light dark matter from atmosphere in PandaX-4T
Creators: name: Ning, Xuyang
name: Abdukerim, Abdusalam
name: Bo, Zihao
name: Chen, Wei
name: Chen, Xun
name: Chen, Yunhua
name: Cheng, Chen
name: Cheng, Zhaokan
name: Cui, Xiangyi
name: Fan, Yingjie
name: Fang, Deqing
name: Fu, Changbo
name: Fu, Mengting
name: Geng, Lisheng
name: Giboni, Karl
name: Gu, Linhui
name: Guo, Xuyuan
name: Han, Chencheng
name: Han, Ke
name: He, Changda
name: He, Jinrong
name: Huang, Di
name: Huang, Yanlin
name: Huang, Zhou
name: Hou, Ruquan
name: Ji, Xiangdong
name: Ju, Yonglin
name: Li, Chenxiang
name: Li, Jiafu
name: Li, Mingchuan
name: Li, Shu
name: Li, Shuaijie
name: Lin, Qing
name: Liu, Jianglai
name: Lu, Xiaoying
name: Luo, Lingyin
name: Luo, Yunyang
name: Ma, Wenbo
name: Ma, Yugang
name: Mao, Yajun
name: Meng, Yue
name: Qi, Ningchun
name: Qian, Zhicheng
name: Ren, Xiangxiang
name: Shaheed, Nasir
name: Shang, Changsong
name: Shang, Xiaofeng
name: Shen, Guofang
name: Si, Lin
name: Sun, Wenliang
name: Tan, Andi
name: Tao, Yi
name: Wang, Anqing
name: Wang, Meng
name: Wang, Qiuhong
name: Wang, Shaobo
name: Wang, Siguang
name: Wang, Wei
name: Wang, Xiuli
name: Wang, Zhou
name: Wei, Yuehuan
name: Wu, Mengmeng
name: Wu, Weihao
name: Xia, Jingkai
name: Xiao, Mengjiao
name: Xiao, Xiang
name: Xie, Pengwei
name: Yan, Binbin
name: Yan, Xiyu
name: Yang, Jijun
name: Yang, Yong
name: Yao, Yukun
name: Yu, Chunxu
name: Yuan, Jumin
name: Yuan, Ying
name: Yuan, Zhe
name: Zeng, Xinning
name: Zhang, Dan
name: Zhang, Minzhen
name: Zhang, Peng
name: Zhang, Shibo
name: Zhang, Shu
name: Zhang, Tao
name: Zhang, Yang
name: Zhang, Yingxin
name: Zhang, Yuanyuan
name: Zhao, Li
name: Zheng, Qibin
name: Zhou, Jifang
name: Zhou, Ning
name: Zhou, Xiaopeng
name: Zhou, Yong
name: Zhou, Yubo
name: Su, Liangliang
name: Wu, Lei
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a search for light dark matter produced through the cascading decay of $η$ mesons, which are created as a result of inelastic collisions between cosmic rays and Earth's atmosphere. We introduce a new and general framework, publicly accessible, designed to address boosted dark matter specifically, with which a full and dedicated simulation including both elastic and quasi-elastic processes of Earth attenuation effect on the dark matter particles arriving at the detector is performed. In the PandaX-4T commissioning data of 0.63 tonne$\cdot$year exposure, no significant excess over background is observed. The first constraints on the interaction between light dark matter generated in the atmosphere and nucleus through a light scalar mediator are obtained. The lowest excluded cross-section is set at $5.9 \times 10^{-37}{\rm cm^2}$ for dark matter mass of $0.1$ MeV$/c^2$ and mediator mass of 300 MeV$/c^2$. The lowest upper limit of $η$ to dark matter decay branching ratio is $1.6 \times 10^{-7}$.
description: 6 pages, 3 figures
Profit efficiency of Australian banks in the period from 2000 to 2008
Creators: name: Lee, Hyun Min
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: This thesis provides an analysis of profit efficiency of Australian banks in the period from 2000 to 2008. The directional (technology) distance function, data envelopment analysis (DEA) and the norm-based profit index approach are utilised to compute profit efficiency scores. Technical- and allocative efficiency scores are provided by the decomposition of profit efficiency, and price efficiency scores are also provided by a separate calculation. -- The profit efficiency of Australian banks is found to have not been improved in the period of study. In contrast to the previous Australian studies, allocative inefficiency is found to be the main source of the overall profit inefficiency of the banks, rather than technical inefficiency. This study also found strong implications for the negative impacts of highly concentrated market structure of the Australian banking sector on Australian banks' efficiency, which are observed from the results of allocative- and price efficiencies. -- Spearman Rank Correlation (SRC) analysis is conducted to examine correlation between profit efficiency and the conventional accounting measures of profitability of Australian banks. The correlation is found between the profit efficiency and return on equity (ROE). However, return on assets (ROA) is found to be negatively correlated to the profit efficiency. The size factors, such as bank's total assets and total equity, are observed to be positively correlated to the profit efficiency.
Cat codes with optimal decoherence suppression for a lossy bosonic channel
Creators: name: Li, Linshu
name: Zou, Chang-ling
name: Albert, Victor V.
name: Muralidharan, Sreraman
name: Girvin, S. M.
name: Jiang, Liang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate cat codes that can correct multiple excitation losses and identify two types of logical errors: bit-flip errors due to excessive excitation loss and dephasing errors due to quantum back-action from the environment. We show that selected choices of logical subspace and coherent amplitude can efficiently reduce dephasing errors. The trade-off between the two major errors enables optimized performance of cat codes in terms of minimized decoherence. With high coupling efficiency, we show that one-way quantum repeaters with cat codes feature drastically boosted secure communication rate per mode compared with conventional encoding schemes, and thus showcase the promising potential of quantum information processing with continuous variable quantum codes.
Neural Parameterization for Dynamic Human Head Editing
Creators: name: Ma, Li
name: Li, Xiaoyu
name: Liao, Jing
name: Wang, Xuan
name: Zhang, Qi
name: Wang, Jue
name: Sander, Pedro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: Implicit radiance functions emerged as a powerful scene representation for reconstructing and rendering photo-realistic views of a 3D scene. These representations, however, suffer from poor editability. On the other hand, explicit representations such as polygonal meshes allow easy editing but are not as suitable for reconstructing accurate details in dynamic human heads, such as fine facial features, hair, teeth, and eyes. In this work, we present Neural Parameterization (NeP), a hybrid representation that provides the advantages of both implicit and explicit methods. NeP is capable of photo-realistic rendering while allowing fine-grained editing of the scene geometry and appearance. We first disentangle the geometry and appearance by parameterizing the 3D geometry into 2D texture space. We enable geometric editability by introducing an explicit linear deformation blending layer. The deformation is controlled by a set of sparse key points, which can be explicitly and intuitively displaced to edit the geometry. For appearance, we develop a hybrid 2D texture consisting of an explicit texture map for easy editing and implicit view and time-dependent residuals to model temporal and view variations. We compare our method to several reconstruction and editing baselines. The results show that the NeP achieves almost the same level of rendering accuracy while maintaining high editability.
description: 15 pages, 18 figures
A LoRaWAN based Solar PV Condition Monitoring System
Creators: name: Qian, Ziyuan
name: Rahu, Thinesh Dharan
name: Ayyalusamy, Vijayakumar
name: Bala Krishnan, Sivaneasan
name: Tan, Kuan Tak
name: Tseng, King Jet
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Electrical energy generation (incl. renewables, excl. photovoltaics)

description: This paper presents the design and performance of a low-cost, low-power remote condition monitoring (CM) solution for large-scale solar photovoltaic (PV) systems. The developed CM solution utilises ESP-NOW and Long Range Wide Area Network (LoRaWAN) wireless communication protocols for data exchanges. The developed solution operates in selfpower mode, with each IoT node capable of monitoring up to 16 channels of voltage, current, and temperature of the PV panels. The 2.4GHz ESP-NOW wireless communication protocol is used for data transfer between the IoT nodes in a many-to one configuration. The transceiver node stores messages from all IoT nodes and broadcasts them via the LoRaWAN network to the server. The developed hardware and software solutions were tested to measure the accuracy and reliability of the CM system. As a result, a fully-functioning low-cost solar PV CM system is developed, with an overall sensor measurement error of less than 3%, with an average Received Signal Strength Indicator (RSSI) of -105dBm in non-line-of-sight conditions.
The Effect of Intra-Layer Bonding on Electron-Optical Phase Images of Few-Layer WSe2
Creators: name: Borghardt, Sven
name: Winkler, Florian
name: Zanolli, Zeila
name: Verstraete, Matthieu Jean
name: Barthel, Juri
name: Dunin-Borkowski, Rafal Edward
name: Kardynal, Beata
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The quantitative analysis of electron-optical phase images recorded using off-axis electron holography often relies on the use of computer simulations of electron propagation through a sample. However, simulations that make use of the independent atom approximation are known to overestimate experimental phase shifts by approximately 10%, as they neglect bonding effects. Here, we compare experimental and simulated phase images for few-layer WSe2 . We show that a combination of pseudopotentials and all-electron density functional theory calculations can be used to obtain accurate mean electron phases, as well as improved atomic-resolution spatial distribution of the electron phase. The comparison demonstrates a perfect contrast match between experimental and simulated atomic-resolution phase images for a sample of precisely know thickness. The low computational cost of this approach makes it suitable for the analysis of large electronic systems, including defects, substitutional atoms and material interfaces.
A missionary in the family: George and Jennie Smith and Aboriginal people, New South Wales 1890-1920
Creators: name: Brett-Vickers, Christine
Publisher: name: La Trobe
Year: 2023

description: This thesis contains images of Aboriginal people now deceased.

Submission note: A thesis submitted in total fulfillment of the requirements for the degree of Doctor of Philosophy to the School of History, Faculty of Arts, La Trobe University, Bundoora.
Multi-Constraint Molecular Generation using Sparsely Labelled Training Data for Localized High-Concentration Electrolyte Diluent Screening
Creators: name: Mailoa, Jonathan P.
name: Li, Xin
name: Qiu, Jiezhong
name: Zhang, Shengyu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Recently, machine learning methods have been used to propose molecules with desired properties, which is especially useful for exploring large chemical spaces efficiently. However, these methods rely on fully labelled training data, and are not practical in situations where molecules with multiple property constraints are required. There is often insufficient training data for all those properties from publicly available databases, especially when ab-initio simulation or experimental property data is also desired for training the conditional molecular generative model. In this work, we show how to modify a semi-supervised variational auto-encoder (SSVAE) model which only works with fully labelled and fully unlabelled molecular property training data into the ConGen model, which also works on training data that have sparsely populated labels. We evaluate ConGen's performance in generating molecules with multiple constraints when trained on a dataset combined from multiple publicly available molecule property databases, and demonstrate an example application of building the virtual chemical space for potential Lithium-ion battery localized high-concentration electrolyte (LHCE) diluents.
Skilful hands and seeing eyes : drawing and drawing masters in the government subsidised school systems of colonial Victoria
Creators: name: Robinson, Margaret Jean
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.
Diabatic Representation of Exotic Hadrons in the Dynamical Diquark Model
Creators: name: Lebed, Richard F.
name: Martinez, Steven R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply the diabatic formalism, an extension of the adiabatic approximation inherent to the Born-Oppenheimer (BO) approach of atomic physics, to the problem of mixing between exotic multiquark hadrons and their nearby di-hadron thresholds. The unperturbed BO eigenstates are obtained using the dynamical diquark model, while the diabatic calculation introduces a mixing potential between these states and the threshold states. We solve the resulting coupled Schrödinger equations numerically for hidden-charm tetraquarks of both open and closed strangeness to obtain physical mass eigenvalues, and explore the di-hadron state content and spatial extent of the eigenstates. As an explicit example, $X(3872)$ emerges with a dominant $D^0 \bar D^{*0}$ component, but also contains a considerable diquark-antidiquark component that can contribute significantly to its radiative decay widths, and this component also generates a full multiplet of other diquark-based exotic hadrons to be compared with experiment.
description: 9 pages - Version accepted to Physical Review D
Transient temperature and mixing times of quantum walks on cycles
Creators: name: Díaz, Nicolás
name: Donangelo, Raul
name: Portugal, Renato
name: Romanelli, Alejandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The definition of entanglement temperature for the quantum walk on the line is extended to $N$-cycles, which are more amenable to a physical implementation. We show that, for these systems, there is a linear connection between the thermalization time and the mixing time, and also that these characteristic times become insensitive to the system size when $N$ is larger than a few units