cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effect of algorithmic bias and network structure on coexistence, consensus, and polarization of opinions
Creators: name: Peralta, Antonio F.
name: Neri, Matteo
name: Kertész, János
name: Iñiguez, Gerardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Individuals of modern societies share ideas and participate in collective processes within a pervasive, variable, and mostly hidden ecosystem of content filtering technologies that determine what information we see online. Despite the impact of these algorithms on daily life and society, little is known about their effect on information transfer and opinion formation. It is thus unclear to what extent algorithmic bias has a harmful influence on collective decision-making, such as a tendency to polarize debate. Here we introduce a general theoretical framework to systematically link models of opinion dynamics, social network structure, and content filtering. We showcase the flexibility of our framework by exploring a family of binary-state opinion dynamics models where information exchange lies in a spectrum from pairwise to group interactions. All models show an opinion polarization regime driven by algorithmic bias and modular network structure. The role of content filtering is, however, surprisingly nuanced; for pairwise interactions it leads to polarization, while for group interactions it promotes coexistence of opinions. This allows us to pinpoint which social interactions are robust against algorithmic bias, and which ones are susceptible to bias-enhanced opinion polarization. Our framework gives theoretical ground for the development of heuristics to tackle harmful effects of online bias, such as information bottlenecks, echo chambers, and opinion radicalization.
Letter from Ezra Pound to Else Seel, February 16, [1950?]
Creators: name: Pound, Ezra, 1885-1972
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Seel, Else, 1894-1974
valueUri: http://id.worldcat.org/fast/184483
subject: Women poets
valueUri: http://id.worldcat.org/fast/1178321
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Poets, German
valueUri: http://id.worldcat.org/fast/1067907
subject: Pound, Ezra, 1885-1972
valueUri: http://id.worldcat.org/fast/29337
subject: Poets, American
valueUri: http://id.worldcat.org/fast/1067794

description: Part of a collection of letters between Ezra and Dorothy Pound, Editha Frobenius, Peter Russel and Else Seel.
Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
Creators: name: Islam, S. M. Riazul
name: Avazov, Nurilla
name: Dobre, Octavia A.
name: Kwak, Kyung Sup
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques for performance enhancement in next-generation cellular communications. Compared to orthogonal frequency division multiple access (OFDMA), which is a well-known high-capacity orthogonal multiple access (OMA) technique, NOMA offers a set of desirable benefits, including greater spectrum efficiency. There are different types of NOMA techniques, including power-domain and code-domain. This paper primarily focuses on power-domain NOMA that utilizes superposition coding (SC) at the transmitter and successive interference cancellation (SIC) at the receiver. Various researchers have demonstrated that NOMA can be used effectively to meet both network-level and user-experienced data rate requirements of fifth-generation (5G) technologies. From that perspective, this paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMA. In addition, this paper discusses how NOMA performs when it is integrated with various proven wireless communications techniques, such as cooperative communications, multiple input multiple output (MIMO), beamforming, space time coding, and network coding, among others. Furthermore, this paper discusses several important issues on NOMA implementation and provides some avenues for future research.
description: 41 pages, 19 figures, IEEE Communications Surveys and Tutorials, 2016
Letter from Ezra Pound to Else Seel, April 15, [1949?]
Creators: name: Pound, Ezra, 1885-1972
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Seel, Else, 1894-1974
valueUri: http://id.worldcat.org/fast/184483
subject: Women poets
valueUri: http://id.worldcat.org/fast/1178321
subject: Pound, Ezra, 1885-1972
valueUri: http://id.worldcat.org/fast/29337
subject: Poets, German
valueUri: http://id.worldcat.org/fast/1067907
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Poets, American
valueUri: http://id.worldcat.org/fast/1067794
subject: Authors
valueUri: http://id.worldcat.org/fast/821688

description: Part of a collection of letters between Ezra and Dorothy Pound, Editha Frobenius, Peter Russel and Else Seel. Pound wishes Seel a happy Easter.
Letter from Ezra Pound to Else Seel, July 18, [1949?]
Creators: name: Pound, Ezra, 1885-1972
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Pound, Ezra, 1885-1972
valueUri: http://id.worldcat.org/fast/29337
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Seel, Else, 1894-1974
valueUri: http://id.worldcat.org/fast/184483
subject: Poets, German
valueUri: http://id.worldcat.org/fast/1067907
subject: Women poets
valueUri: http://id.worldcat.org/fast/1178321
subject: Poets, American
valueUri: http://id.worldcat.org/fast/1067794

description: Part of a collection of letters between Ezra and Dorothy Pound, Editha Frobenius, Peter Russel and Else Seel.
Gapless Higgs Mode in the Fulde-Ferrell-Larkin-Ovchinnikov State of a Superconductor
Creators: name: Huang, Zhao
name: Ting, C. S.
name: Zhu, Jian-Xin
name: Lin, Shi-Zeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Higgs mode associated with amplitude fluctuations of the superconducting gap in uniform superconductors usually is heavy, which makes its excitation and detection difficult. We report on the existence of a gapless Higgs mode in the Fulde-Ferrell-Larkin-Ovchinnikov states. This feature is originated from the Goldstone mode associated with the translation symmetry breaking. The existence of the gapless Higgs mode is demonstrated by using both a phenomenological model and microscopic Bardeen-Cooper-Schrieffer (BCS) theory. The gapless Higgs mode can avoid the decay into other low energy excitations, which renders it stable and detectable.
description: 11 pages, 3 figures, LA-UR-21-24876
A Critical Reexamination of the Electrostatic Aharonov-Bohm Effect
Creators: name: Walstad, Allan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper undertakes a critical reexamination of the electrostatic version of the Aharonov-Bohm ("AB") effect. The conclusions are as follows: 1. Aharonov and Bohm's 1959 exposition is invalid because it does not consider the wavefunction of the entire system, including the source of electrostatic potential. 2. As originally proposed, the electrostatic AB effect does not exist. Perhaps surprisingly, this conclusion holds despite the relativistic covariance of the electromagnetic four-potential combined with the well-established magnetic AB effect. 3. Although the authors attempted, in a 1961 paper, to demonstrate that consideration of the entire system would not change their result, they inadvertently assumed the desired outcome in their analysis. 4. Claimed observations of the electrostatic AB effect or an analogue thereof are shown to be mistaken.
description: 7 pages plus two figures. The manuscript version of a paper published in the International Journal of Theoretical Physics. Any reference to (or quotation from) this paper should be to the published version
Letter from Ezra Pound to Else Seel, May 20, 1948
Creators: name: Pound, Ezra, 1885-1972
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women poets
valueUri: http://id.worldcat.org/fast/1178321
subject: Pound, Ezra, 1885-1972
valueUri: http://id.worldcat.org/fast/29337
subject: Poets, American
valueUri: http://id.worldcat.org/fast/1067794
subject: Seel, Else, 1894-1974
valueUri: http://id.worldcat.org/fast/184483
subject: Poets, German
valueUri: http://id.worldcat.org/fast/1067907
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Authors
valueUri: http://id.worldcat.org/fast/821688

description: Part of a collection of letters between Ezra and Dorothy Pound, Editha Frobenius, Peter Russel and Else Seel. Pound thanks Seel for sending a piece of chinoiserie.
Letter from Ezra Pound to Else Seel, March 3, [1950?]
Creators: name: Pound, Ezra, 1885-1972
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Pound, Ezra, 1885-1972
valueUri: http://id.worldcat.org/fast/29337
subject: Poets, German
valueUri: http://id.worldcat.org/fast/1067907
subject: Seel, Else, 1894-1974
valueUri: http://id.worldcat.org/fast/184483
subject: Women poets
valueUri: http://id.worldcat.org/fast/1178321
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets, American
valueUri: http://id.worldcat.org/fast/1067794
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778

description: Part of a collection of letters between Ezra and Dorothy Pound, Editha Frobenius, Peter Russel and Else Seel.
Beam combination schemes and technologies for the Planet Formation Imager (PFI)
Creators: name: Minardi, Stefano
name: Lacour, Sylvestre
name: Berger, Jean-Philippe
name: Labadie, Lucas
name: Thomson, Robert R.
name: Haniff, Chris
name: Ireland, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Planet Formation Imager (PFI) initiative aims at developing the next generation large scale facility for imaging astronomical optical interferometry operating in the mid-infrared. Here we report on the progress of the Planet Formation Imager Technical Working Group on the beam-combination instruments. We will discuss various available options for the science and fringe-tracker beam combination instruments, ranging from direct imaging, to non-redundant fiber arrays, to integrated optics solutions. Besides considering basic characteristics of the schemes, we will investigate the maturity of the available technological platforms at near- and mid-infrared wavelengths.
description: 17 pages, 7 figures, Proceedings of SPIE 2016
Flat-band ferromagnetism and spin waves in the Haldane-Hubbard model
Creators: name: Leite, Leonardo S. G.
name: Doretto, R. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the flat-band ferromagnetic phase of the Haldane-Hubbard model on a honeycomb lattice within a bosonization scheme for flat-band Chern insulators, focusing on the calculation of the spin-wave excitation spectrum. We consider the Haldane-Hubbard model with the noninteracting lower bands in a nearly-flat band limit, previously determined for the spinless model, and at 1/4-filling of its corresponding noninteracting limit. Within the bosonization scheme, the Haldane-Hubbard model is mapped into an effective interacting boson model, whose quadratic term allows us to determine the spin-wave spectrum at the harmonic approximation. We show that the excitation spectrum has two branches with a Goldstone mode and Dirac points at center and at the K and K' points of the first Brillouin zone, respectively. We also consider the effects on the spin-wave spectrum due to an energy offset in the on-site Hubbard repulsion energies and due to the presence of an staggered on-site energy term, both quantities associated with the two triangular sublattices. In both cases, we find that an energy gap opens at the K and K' points. Moreover, we also find some evidences for an instability of the flat-band ferromagnetic phase in the presence of the staggered on-site energy term. We provide some additional results for the square lattice topological Hubbard model previous studied within the bosonization formalism and comment on the differences between the bosonization scheme implementation for the correlated Chern insulators on both square and honeycomb lattices.
description: 17 pages, 11 figures, final version
An investigation of children's knowledge and strategies in mathematical problem solving
Creators: name: Kaur, Berinderjeet
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 References field.
Otlè: il mondo in una macchina
Creators: name: Cardone, Felice
Publisher: name: Zenodo
Year: 2023
Subjects: Otlè, classificazioni, informazioni

description: Dove il presente è raccontato come una previsione del futuro fatta nel passato, con la voce un personaggio immaginario ma non troppo.* Si sentirà parlare di classificazioni, supermercati, architettura delle informazioni e di una macchina meravigliosa che forse non esisterà mai. Continua a leggere...
Bogoliubov corrections and trace norm convergence for the Hartree dynamics
Creators: name: Mitrouskas, David
name: Petrat, Sören
name: Pickl, Peter
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 35Q40, 35Q55, 81Q05, 82C10

description: We consider the dynamics of a large number N of nonrelativistic bosons in the mean field limit for a class of interaction potentials that includes Coulomb interaction. In order to describe the fluctuations around the mean field Hartree state, we introduce an auxiliary Hamiltonian on the N-particle space that is very similar to the one obtained from Bogoliubov theory. We show convergence of the auxiliary time evolution to the fully interacting dynamics in the norm of the N-particle space. This result allows us to prove several other results: convergence of reduced density matrices in trace norm with optimal rate, convergence in energy trace norm, and convergence to a time evolution obtained from the Bogoliubov Hamiltonian on Fock space with expected optimal rate. We thus extend and quantify several previous results, e.g., by providing the physically important convergence rates, including time-dependent external fields and singular interactions, and allowing for general initial states, e.g., those that are expected to be ground states of interacting systems.
description: 31 pages, LaTex
Otle: il mondo in una macchina
Creators: name: Cardone, Felice
Publisher: name: Zenodo
Year: 2023
Subjects: Otlè, classificazioni, informazioni

description: Dove il presente è raccontato come una previsione del futuro fatta nel passato, con la voce un personaggio immaginario ma non troppo.* Si sentirà parlare di classificazioni, supermercati, architettura delle informazioni e di una macchina meravigliosa che forse non esisterà mai. Continua a leggere...
Spectral boundary conditions and solitonic solutions in a classical Sellmeier dielectric
Creators: name: Belgiorno, F.
name: Cacciatori, S. L.
name: Viganò, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Electromagnetic field interactions in a dielectric medium represent a longstanding field of investigation, both at the classical level and at the quantum one. We propose a 1+1 dimensional toy-model which consists of an half-line filling dielectric medium, with the aim to set up a simplified situation where technicalities related to gauge invariance and, as a consequence, physics of constrained systems are avoided, and still interesting features appear. In particular, we simulate the electromagnetic field and the polarization field by means of two coupled scalar fields $ϕ$,$ψ$ respectively, in a Hopfield-like model. We find that, in order to obtain a physically meaningful behaviour for the model, one has to introduce spectral boundary conditions depending on the particle spectrum one is dealing with. This is the first interesting achievement of our analysis. The second relevant achievement is that, by introducing a nonlinear contribution in the polarization field $ψ$, with the aim of mimicking a third order nonlinearity in a nonlinear dielectric, we obtain solitonic solutions in the Hopfield model framework, whose classical behaviour is analyzed too.
description: 12 pages, 1 figure
A physically-based model of the ionizing radiation from active galaxies for photoionization modeling
Creators: name: Thomas, Adam D.
name: Groves, Brent A.
name: Sutherland, Ralph S.
name: Dopita, Michael A.
name: Jin, Chichuan
name: Kewley, Lisa J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a simplified model of Active Galactic Nucleus (AGN) continuum emission designed for photoionization modeling. The new model {\sc oxaf} reproduces the diversity of spectral shapes that arise in physically-based models. We identify and explain degeneracies in the effects of AGN parameters on model spectral shapes, with a focus on the complete degeneracy between the black hole mass and AGN luminosity. Our re-parametrized model {\sc oxaf} removes these degeneracies and accepts three parameters which directly describe the output spectral shape: the energy of the peak of the accretion disk emission $E_\mathrm{peak}$, the photon power-law index of the non-thermal emission $Γ$, and the proportion of the total flux which is emitted in the non-thermal component $p_\mathrm{NT}$. The parameter $E_\mathrm{peak}$ is presented as a function of the black hole mass, AGN luminosity, and `coronal radius' of the {\sc optxagnf} model upon which {\sc oxaf} is based. We show that the soft X-ray excess does not significantly affect photoionization modeling predictions of strong emission lines in Seyfert narrow-line regions. Despite its simplicity, {\sc oxaf} accounts for opacity effects where the accretion disk is ionized because it inherits the `color correction' of {\sc optxagnf}. We use a grid of {\sc mappings} photoionization models with {\sc oxaf} ionizing spectra to demonstrate how predicted emission-line ratios on standard optical diagnostic diagrams are sensitive to each of the three {\sc oxaf} parameters. The {\sc oxaf} code is publicly available in the Astrophysics Source Code Library.
description: 14 pages, 9 figures, 1 table. Accepted for publication in ApJ
Synergi: A Mixed-Initiative System for Scholarly Synthesis and Sensemaking
Creators: name: Kang, Hyeonsu B.
name: Wu, Sherry Tongshuang
name: Chang, Joseph Chee
name: Kittur, Aniket
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Efficiently reviewing scholarly literature and synthesizing prior art are crucial for scientific progress. Yet, the growing scale of publications and the burden of knowledge make synthesis of research threads more challenging than ever. While significant research has been devoted to helping scholars interact with individual papers, building research threads scattered across multiple papers remains a challenge. Most top-down synthesis (and LLMs) make it difficult to personalize and iterate on the output, while bottom-up synthesis is costly in time and effort. Here, we explore a new design space of mixed-initiative workflows. In doing so we develop a novel computational pipeline, Synergi, that ties together user input of relevant seed threads with citation graphs and LLMs, to expand and structure them, respectively. Synergi allows scholars to start with an entire threads-and-subthreads structure generated from papers relevant to their interests, and to iterate and customize on it as they wish. In our evaluation, we find that Synergi helps scholars efficiently make sense of relevant threads, broaden their perspectives, and increases their curiosity. We discuss future design implications for thread-based, mixed-initiative scholarly synthesis support tools.
description: ACM UIST'23
"Existential Risks Associated with Dual-Use Technologies"
Creators: name: Vaseashta, Ashok
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: subject: dual-use technologies
subject: catastrophic risk
subject: existential risk
subject: nano-biotechnology
subject: threat intelligence

description: Dual-Use Research of Concern articulates research and innovation that is intended to provide useful knowledge, information, or products; however, it could also be misused to present existential risks to society, with broad potential consequences. Thus far, it has been considered in the context of nuclear and biological research, however, the principles can be applied to other fields. With the emergence of new and exponential technologies, there is a significant potential to enrich our lives, however, the risks associated with their use for nefarious purposes remain inextricable from their benefits. A comprehensive overview of existential risks and threats posed by dual-use technologies adaptation is outlined in this article. A special emphasis is placed on information technology and artificial intelligence which has transformative implications and has produced a wide range of capabilities to stay ahead of threats. Unfortunately, in an open society, cybercriminals take advantage of the same technology for malicious purposes. Hence, in the new and complex security environment, these new technologies must be examined carefully, especially regarding their potential dual-use nature. Furthermore, extracting threats from the benefits of exponential technologies is a complex undertaking, and is addressed in this report to lay the groundwork with the intent to curb dual-use technology proliferation.
Parametrically driving a quantum oscillator into exceptionality
Creators: name: Downing, C. A.
name: Vidiella-Barranco, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The mathematical objects employed in physical theories do not always behave well. Einstein's theory of space and time allows for spacetime singularities and Van Hove singularities arise in condensed matter physics, while intensity, phase and polarization singularities pervade wave physics. Within dissipative systems governed by matrices, singularities occur at the exceptional points in parameter space whereby some eigenvalues and eigenvectors coalesce simultaneously. However, the nature of exceptional points arising in quantum systems described within an open quantum systems approach has been much less studied. Here we consider a quantum oscillator driven parametrically and subject to loss. This squeezed system exhibits an exceptional point in the dynamical equations describing its first and second moments, which acts as a borderland between two phases with distinctive physical consequences. In particular, we discuss how the populations, correlations, squeezed quadratures and optical spectra crucially depend on being above or below the exceptional point. We also remark upon the presence of a dissipative phase transition at a critical point, which is associated with the closing of the Liouvillian gap. Our results invite the experimental probing of quantum resonators under two-photon driving, and perhaps a reappraisal of exceptional and critical points within dissipative quantum systems more generally.
description: 14 pages, 6 figures
ContextLabeler Dataset: physical and virtual sensors data collected from smartphone usage in-the-wild
Creators: name: Campana, Mattia Giovanni
name: Delmastro, Franca
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper describes a data collection campaign and the resulting dataset derived from smartphone sensors characterizing the daily life activities of 3 volunteers in a period of two weeks. The dataset is released as a collection of CSV files containing more than 45K data samples, where each sample is composed by 1332 features related to a heterogeneous set of physical and virtual sensors, including motion sensors, running applications, devices in proximity, and weather conditions. Moreover, each data sample is associated with a ground truth label that describes the user activity and the situation in which she was involved during the sensing experiment (e.g., working, at restaurant, and doing sport activity). To avoid introducing any bias during the data collection, we performed the sensing experiment in-the-wild, that is, by using the volunteers' devices, and without defining any constraint related to the user's behavior. For this reason, the collected dataset represents a useful source of real data to both define and evaluate a broad set of novel context-aware solutions (both algorithms and protocols) that aim to adapt their behavior according to the changes in the user's situation in a mobile environment.
Transition matters : factors that affect students' first-year experience, satisfaction and persistence at university
Creators: name: Kantanis, Soultana Tanya
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 References field.
On CR maps from the sphere into the tube over the future light cone
Creators: name: Reiter, Michael
name: Son, Duong Ngoc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32H35, 32V40

description: We determine all local smooth or formal CR maps from the unit sphere $\mathbb{S}^3\subset \mathbb{C}^2$ into the tube $\mathcal{T}:= \mathcal{C} \times i\mathbb{R}^3 \subset \mathbb{C}^3$ over the future light cone $\mathcal{C}:= \left\{x\in \mathbb{R}^3\colon x_1^2+x_2^2 = x_3^2, \ x_3 > 0\right\}$. This result leads to a complete classification of proper holomorphic maps from the unit ball in $\mathbb{C}^2$ into Cartan's classical domain of type IV in $\mathbb{C}^3$ that extend smoothly to some boundary point. Up to composing with CR automorphisms of the source and target, the classification consists of four algebraic maps. Two maps among them were known earlier in the literature, which were shown to be ``rigid'' in the higher dimensional case in a recent paper by Xiao and Yuan. Two newly discovered quadratic polynomial maps provide counterexamples to a conjecture appeared in the same paper for the case of dimension two.
Skeletons in Toorak and Collingwood cupboards : eugenics in educational and health policy in Victoria, 1910 to 1939
Creators: name: Jones, Ross L.
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 References field.
Optimal detection of the feature matching map in presence of noise and outliers
Creators: name: Galstyan, Tigran
name: Minasyan, Arshak
name: Dalalyan, Arnak
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider the problem of finding the matching map between two sets of $d$ dimensional vectors from noisy observations, where the second set contains outliers. The matching map is then an injection, which can be consistently estimated only if the vectors of the second set are well separated. The main result shows that, in the high-dimensional setting, a detection region of unknown injection can be characterized by the sets of vectors for which the inlier-inlier distance is of order at least $d^{1/4}$ and the inlier-outlier distance is of order at least $d^{1/2}$. These rates are achieved using the estimated matching minimizing the sum of logarithms of distances between matched pairs of points. We also prove lower bounds establishing optimality of these rates. Finally, we report results of numerical experiments on both synthetic and real world data that illustrate our theoretical results and provide further insight into the properties of the estimators studied in this work.
description: accepted to ejs
"Fairness in AI and Its Long-Term Implications on Society"
Creators: name: Bohdal, Ondrej
name: Hospedales, Timothy
name: Torr, Philip H.S.
name: Barez, Fazl
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: AI fairness
AI safety
AI risks
cascading risks
biased AI models

description: Successful deployment of artificial intelligence (AI) in various settings has led to numerous positive outcomes for individuals and society. However, AI systems have also been shown to harm parts of the population due to biased predictions. AI fairness focuses on mitigating such biases to ensure AI decision making is not discriminatory towards certain groups. We take a closer look at AI fairness and analyze how lack of AI fairness can lead to deepening of biases over time and act as a social stressor. More specifically, we discuss how biased models can lead to more negative real-world outcomes for certain groups, which may then become more prevalent by deploying new AI models trained on increasingly biased data, resulting in a feedback loop. If the issues persist, they could be reinforced by interactions with other risks and have severe implications on society in the form of social unrest. We examine current strategies for improving AI fairness, assess their limitations in terms of real-world deployment, and explore potential paths forward to ensure we reap AI’s benefits without causing society’s collapse.
A novel framework for author obfuscation using generalised differential privacy
Creators: name: Fernandes, Natasha
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: The problem of obfuscating the authorship of a text document has received little attention in the literature to date. Current approaches are ad-hoc and rely on assumptions about an adversary's auxiliary knowledge which makes it difficult to reason about the privacy properties of these methods. Another approach to privacy, known as differential privacy, is advocated in the literature for its strong privacy guarantees. However, differential privacy has been dismissed as an option for text document privacy due to its design around the release of aggregate statistics, and its dependence on notions of 'adjacency',neither of which apply to text document privacy. In addition, differential privacy does not permit the release of individual data points as required for text document publishing. However, a new approach to privacy known as generalised differential privacy extends differential privacy to arbitrary datasets with no notion of adjacency, and permits the private release of individual data points. In this thesis, we show to apply generalised differential privacy to author obfuscation, drawing inspiration from the example of geo-location privacy, and utilising existing tools and methods from the stylometry and natural language processing literature.
Polynomial Stochastic Dynamical Indicators
Creators: name: Vasile, Massimiliano
name: Manzi, Matteo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: I.m
subject: 37, 68, 85, 00A69,

description: This paper introduces three types of dynamical indicators that capture the effect of uncertainty on the time evolution of dynamical systems. Two indicators are derived from the definition of Finite Time Lyapunov Exponents while a third indicator directly exploits the property of the polynomial expansion of the dynamics with respect to the uncertain quantities. The paper presents the derivation of the indicators and a number of numerical experiments that illustrates the use of these indicators to depict a cartography of the phase space under parametric uncertainty and to identify robust initial conditions and regions of practical stability in the restricted three-body problem.
description: 42 pages, 20 figures
A theoretical framework for the integration of computer use in mathematics education for preservice teacher education students : developmental case studies
Creators: name: Jones, Anthony John
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 References field.
A New Line Defect in NdTiO3 Perovskite
Creators: name: Jeong, Jong Seok
name: Topsakal, Mehmet
name: Xu, Peng
name: Jalan, Bharat
name: Wentzcovitch, Renata M.
name: Mkhoyan, K. Andre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Perovskite oxides form an eclectic class of materials owing to their structural flexibility in accommodating cations of different sizes and valences. They host well known point and planar defects, but so far no line defect has been identified other than dislocations. Using analytical scanning transmission electron microscopy (STEM) and ab initio calculations we have detected and characterized the atomic and electronic structures of a novel line defect in NdTiO3 perovskite. It appears in STEM images as a perovskite cell rotated by 45 degrees. It consists of self-organized Ti-O vacancy lines replaced by Nd columns surrounding a central Ti-O octahedral chain containing Ti4+ ions, as opposed to Ti3+ in the host. The distinct Ti valence in this line defect introduces the possibility of engineering exotic conducting properties in a single preferred direction and tailoring novel desirable functionalities in this Mott insulator.
description: 24 pages, 5 figures
Practical Beam Transport for the Planet Formation Imager (PFI)
Creators: name: Mozurkewich, David
name: Young, John
name: Ireland, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Planet Formation Imager (PFI) is a future kilometric-baseline infrared interferometer to image the complex physical processes of planet formation. Technologies that could be used to transport starlight to a central beam-combining laboratory in PFI include free-space propagation in air or vacuum, and optical fibres. This paper addresses the design and cost issues associated with free-space propagation in vacuum pipes. The signal losses due to diffraction over long differential paths are evaluated, and conceptual beam transport designs employing pupil management to ameliorate these losses are presented and discussed.
description: 11 pages, 10 figures, Proceedings of SPIE 2016
Otlè: estensioni della memoria
Creators: name: Cardone, Felice
Publisher: name: Zenodo
Year: 2023
Subjects: Otlè, sistemi di classificazione, memoria

description: Dove si racconta di un secondo incontro con il signor Otlé, in cui viene descritta un’altra macchina meravigliosa, che forse esiste già.* Seconda parte del racconto di Otlè: continua a leggere
Introducción a los D-módulos
Creators: name: Arias, Juan Camilo
name: Rengifo, Camilo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Estas notas son las memorias del cursillo dictado en el XXII Congreso Colombiano de Matemáticas en la Universidad del Cauca en Popayán - Colombia. El objetivo de este escrito es brindar un acercamiento a la teoría de módulos sobre el anillo de operadores diferenciales de una variedad algebraica suave. These are the lecture notes of a short course given at the XXII Colombian Congress of Mathematics held at Universidad del Cauca in Popayán - Colombia. The aim of this paper is to provide an introduction to the theory of modules over rings of differential operators over a smooth algebraic variety.
description: Paper in Spanish language
Quasi-Periodic Intermittency in Oscillating Cylinder Flow
Creators: name: Glaz, Bryan
name: Mezic, Igor
name: Fonoberova, Maria
name: Loire, Sophie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Fluid dynamics induced by periodically forced flow around a cylinder is analyzed computationally for the case when the forcing frequency is much lower than the von K{á}rm{á}n vortex shedding frequency corresponding to the constant flow velocity condition. By using the Koopman Mode Decomposition approach, we find a new normal form equation that extends the classical Hopf bifurcation normal form by a time-dependent term for Reynolds numbers close to the Hopf bifurcation value. The normal form describes the dynamics of an observable and features a forcing (control) term that multiplies the state, and is thus a parametric - i.e. not an additive - forcing effect. We find that the dynamics of the flow in this regime are characterized by alternating instances of quiescent and strong oscillatory behavior, and that this pattern persists indefinitely. Furthermore, the spectrum of the associated Koopman operator is shown to possess quasi-periodic features. We establish the theoretical underpinnings of this phenomenon -- that we name Quasi-Periodic Intermittency -- using the new normal form model and show that the dynamics are caused by the tendency of the flow to oscillate between the unstable fixed point and the stable limit cycle of the unforced flow. The quasi-periodic intermittency phenomena is also characterized by positive Finite-Time Lyapunov Exponents that, over a long period of time, asymptotically approach zero.
description: Submitted to the Journal of Fluid Mechanics (9/19/2016) and currently under review
Antenna Impedance Estimation in Correlated Rayleigh Fading Channels
Creators: name: Wu, Shaohan
name: Hughes, Brian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We formulate antenna impedance estimation in a classical estimation framework under correlated Raleigh fading channels. Based on training sequences of multiple packets, we derive the ML estimators for antenna impedance and channel variance, treating the fading path gains as nuisance parameters. These ML estimators can be found via scalar optimization. We explore the efficiency of these estimators against Cramer-Rao lower bounds by numerical examples. The impact of channel correlation on impedance estimation accuracy is investigated.
description: 5 pages, 2 figures, ICASSP 2023. arXiv admin note: substantial text overlap with arXiv:2006.11443
The hot Gamma-Doradus and Maia stars
Creators: name: Balona, L. A.
name: Engelbrecht, C. A.
name: Joshi, Yogesh C.
name: Joshi, S.
name: Sharma, K.
name: Semenko, E.
name: Pandey, G.
name: Chakradhari, N. K.
name: Mkrtichian, David
name: Hema, B. P.
name: Nemec, J. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The hot $γ$~Doradus stars have multiple low frequencies characteristic of $γ$~Dor or SPB variables, but are located between the red edge of the SPB and the blue edge of the $γ$~Dor instability strips where all low-frequency modes are stable in current models of these stars. Though $δ$~Sct stars also have low frequencies, there is no sign of high frequencies in hot $γ$~Dor stars. We obtained spectra to refine the locations of some of these stars in the H-R diagram and conclude that these are, indeed, anomalous pulsating stars. The Maia variables have multiple high frequencies characteristic of $β$~Cep and $δ$~Sct stars, but lie between the red edge of the $β$~Cep and the blue edge of the $δ$~Sct instability strips. We compile a list of all Maia candidates and obtain spectra of two of these stars. Again, it seems likely that these are anomalous pulsating stars which are currently not understood.
description: 10 pages, 8 figures, 2016, MNRAS, 460, 1318
On the Exploitation of Admittance Measurements for Wired Network Topology Derivation
Creators: name: Passerini, Federico
name: Tonello, Andrea M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The knowledge of the topology of a wired network is often of fundamental importance. For instance, in the context of Power Line Communications (PLC) networks it is helpful to implement data routing strategies, while in power distribution networks and Smart Micro Grids (SMG) it is required for grid monitoring and for power flow management. In this paper, we use the transmission line theory to shed new light and to show how the topological properties of a wired network can be found exploiting admittance measurements at the nodes. An analytic proof is reported to show that the derivation of the topology can be done in complex networks under certain assumptions. We also analyze the effect of the network background noise on admittance measurements. In this respect, we propose a topology derivation algorithm that works in the presence of noise. We finally analyze the performance of the algorithm using values that are typical of power line distribution networks.
description: A version of this manuscript has been submitted to the IEEE Transactions on Instrumentation and Measurement for possible publication. The paper consists of 8 pages, 11 figures, 1 table
Finite-orbit-width effects on the geodesic acoustic mode in the toroidally rotating tokamak plasma
Creators: name: Ren, Haijun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Landau damping of geodesic acoustic mode (GAM) in a torodial rotating tokamak plasma is analytically investigated by taking into account the finite-orbit-width (FOW) resonance effect to the 3rd order. The analytical result is shown to agree well with the numerical solution. The dependence of the damping rate on the toroidal Mach number $M$ relies on $k_r ρ_i$. For sufficiently small $k_r ρ_i$, the damping rate monotonically decreases with $M$. For relatively large $k_r ρ_i$, the damping rate increases with $M$ until approaching the maximum and then decreases with $M$.
description: submitted to Physics of Plasmas on October 10, 2016
Of Peacocks, Tulips, and Shotguns: Intentions and Side Effects in John Finnis' Natural Law Theory
Creators: name: Lyons, Edward C.
Publisher: name: University of Bologna Law Review
Year: 2020
Subjects: Basic Goods; Natural Law; Intention; Side Effects; Finnis

description: This article constitutes a detailed response to John Finnis’ present-day critique and deconstruction of two famous tort cases decided in England in the first half of the nineteenth century: Ilott v. Wilkes (King’s Bench 1820) and its progeny Bird v. Holbrook (Court of Common Pleas 1828). Both cases involved trespassers who were seriously injured upon entering landowners’ property without permission. Their injuries were caused by means of ‘man-traps,’ i.e., shotguns set outdoors by a landowner and primed to fire upon contact with a tripwire. Finnis concedes that in laying man-traps, landowners may not have had a desire to harm (in fact they may have had a desire not to harm) but merely to deter. Nevertheless, according to Finnis, any landowner setting such devices, even if he posts clear warnings, ineluctably involves that owner in “conditionally, but really” intending to kill or seriously injure. The present article challenges this view. It argues, by applying Finnis’ own natural law theory of human action, intention, and choice, that his conclusion is undermined. While this topic may appear arcane to some, it focuses attention on important general questions in legal theory and philosophy about the meaning of intentions, choices, and side effects.
description: University of Bologna Law Review, Vol 5, No 1 (2020)
Domain Adaptation via Minimax Entropy for Real/Bogus Classification of Astronomical Alerts
Creators: name: Cabrera-Vives, Guillermo
name: Bolivar, César
name: Förster, Francisco
name: Arancibia, Alejandra M. Muñoz
name: Pérez-Carrasco, Manuel
name: Reyes, Esteban
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.2.1
subject: 85-08

description: Time domain astronomy is advancing towards the analysis of multiple massive datasets in real time, prompting the development of multi-stream machine learning models. In this work, we study Domain Adaptation (DA) for real/bogus classification of astronomical alerts using four different datasets: HiTS, DES, ATLAS, and ZTF. We study the domain shift between these datasets, and improve a naive deep learning classification model by using a fine tuning approach and semi-supervised deep DA via Minimax Entropy (MME). We compare the balanced accuracy of these models for different source-target scenarios. We find that both the fine tuning and MME models improve significantly the base model with as few as one labeled item per class coming from the target dataset, but that the MME does not compromise its performance on the source dataset.
How can computers be used to promote metacognition in primary school students?
Creators: name: Johnson, Richard
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 References field.