cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The perihelion activity of comet 67P/Churyumov-Gerasimenko as seen by robotic telescopes
Creators: name: Snodgrass, Colin
name: Opitom, Cyrielle
name: de Val-Borro, Miguel
name: Jehin, Emmanuel
name: Manfroid, Jean
name: Lister, Tim
name: Marchant, Jon
name: Jones, Geraint H.
name: Fitzsimmons, Alan
name: Steele, Iain A.
name: Smith, Robert J.
name: Jermak, Helen
name: Granzer, Thomas
name: Meech, Karen J.
name: Rousselot, Philippe
name: Levasseur-Regourd, Anny-Chantal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Around the time of its perihelion passage the observability of 67P/Churyumov-Gerasimenko from Earth was limited to very short windows each morning from any given site, due to the low solar elongation of the comet. The peak in the comet's activity was therefore difficult to observe with conventionally scheduled telescopes, but was possible where service/queue scheduled mode was possible, and with robotic telescopes. We describe the robotic observations that allowed us to measure the total activity of the comet around perihelion, via photometry (dust) and spectroscopy (gas), and compare these results with the measurements at this time by Rosetta's instruments. The peak of activity occurred approximately two weeks after perihelion. The total brightness (dust) largely followed the predictions from Snodgrass et al. 2013, with no significant change in total activity levels from previous apparitions. The CN gas production rate matched previous orbits near perihelion, but appeared to be relatively low later in the year.
description: To appear in special issue of MNRAS "The ESLAB 50 Symposium - spacecraft at comets from 1P/Halley to 67P/Churyumov-Gerasimenko"
Difference- and regression-based approaches for detection of bias
Creators: name: Lim, Chun Yee
name: Markus, Corey
name: Greaves, Ronda
name: Loh, Tze Ping
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: classificationCode: 320202
subject: Clinical chemistry (incl. diagnostics)

description: This simulation study was undertaken to assess the statistical performance of six commonly used rejection criteria for bias detection.The false rejection rate (i.e. rejection in the absence of simulated bias) and the probability of bias detection were assessed for the following: difference in measurements for individual sample pair, the mean of the paired differences, t-statistics (paired t-test), slope < 0.9 or > 1.1, intercept > 50% of the lower limit of measurement range, and coefficient of determination (R2) > 0.95. The linear regressions evaluated were ordinary least squares, weighted least squares and Passing-Bablok regressions. A bias detection rate of < 50% and false rejection rates of >10% are considered unacceptable for the purpose of this study. Rejection criteria based on regression slope, intercept and paired difference (10%) for individual samples have high false rejection rates and/ or low probability of bias detection. T-statistics (α = 0.05) performed best in low range ratio (lowest-to-highest concentration in measurement range) and low imprecision scenarios. Mean difference (10%) performed better in all other range ratio and imprecision scenarios. Combining mean difference and paired-t test improves the power of bias detection but carries higher false rejection rates.This study provided objective evidence on commonly used rejection criteria to guide laboratory on the experimental design and statistical assessment for bias detection during method evaluation or reagent lot verification.
Gravitational Wave Pathway to Testable Leptogenesis
Creators: name: Dasgupta, Arnab
name: Dev, P. S. Bhupal
name: Ghoshal, Anish
name: Mazumdar, Anupam
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the classically scale-invariant $B-L$ model in the context of resonant leptogenesis with the recently proposed mass-gain mechanism. The $B-L$ symmetry breaking in this scenario is associated with a strong first order phase transition that gives rise to detectable gravitational waves (GWs) via bubble collisions. The same $B-L$ symmetry breaking also gives Majorana mass to right-handed neutrinos inside the bubbles, and their out of equilibrium decays can produce the observed baryon asymmetry of the Universe via leptogenesis. We show that the current LIGO-VIRGO limit on stochastic GW background already excludes part of the $B-L$ parameter space, complementary to the collider searches for heavy $Z^{\prime}$ resonances. Moreover, future GW experiments like Einstein Telescope and Cosmic Explorer can effectively probe the parameter space of leptogenesis over a wide range of the $B-L$ symmetry-breaking scales and gauge coupling values.
description: 11 pages, 3 figures and 2 tables,version to appear in PRD
Transmit Beamforming for Interference Exploitation in the Underlay Cognitive Radio Z-channel
Creators: name: Law, Ka Lung
name: Masouros, Christos
name: Pesavento, Marius
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper introduces novel transmit beamforming approaches for the cognitive radio (CR) Z-channel. The proposed transmission schemes exploit non-causal information about the interference at the SBS to re-design the CR beamforming optimization problem. This is done with the objective to improve the quality of service (QoS) of secondary users by taking advantage of constructive interference in the secondary link. The beamformers are designed to minimize the worst secondary user's symbol error probability (SEP) under constraints on the instantaneous total transmit power, and the power of the instantaneous interference in the primary link. The problem is formulated as a bivariate probabilistic constrained programming (BPCP) problem. We show that the BPCP problem can be transformed for practical SEPs into a convex optimization problem that can be solved, e.g., by the barrier method. A computationally efficient tight approximate approach is also developed to compute the near-optimal solutions. Simulation results and analysis show that the average computational complexity per downlink frame of the proposed approximate problem is comparable to that of the conventional CR downlink beamforming problem. In addition, both the proposed methods offer significant performance improvements as compared to the conventional CR downlink beamforming, while guaranteeing the QoS of primary users on an instantaneous basis, in contrast to the average QoS guarantees of conventional beamformers.
Accelerated quantum control using superadiabatic dynamics in a solid-state lambda system
Creators: name: Zhou, Brian B.
name: Baksic, Alexandre
name: Ribeiro, Hugo
name: Yale, Christopher G.
name: Heremans, F. Joseph
name: Jerger, Paul C.
name: Auer, Adrian
name: Burkard, Guido
name: Clerk, Aashish A.
name: Awschalom, David D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Adiabatic evolutions find widespread utility in applications to quantum state engineering, geometric quantum computation, and quantum simulation. Although offering robustness to experimental imperfections, adiabatic processes are susceptible to decoherence due to their long evolution time. A general strategy termed "shortcuts to adiabaticity" (STA) aims to remedy this vulnerability by designing fast dynamics to reproduce the results of slow, adiabatic evolutions. Here, we implement a novel STA technique known as "superadiabatic transitionless driving" (SATD) to speed up stimulated Raman adiabatic passage (STIRAP) in a solid-state lambda (Λ) system. Utilizing optical transitions to a dissipative excited state in the nitrogen-vacancy (NV) center in diamond, we demonstrate the accelerated performance of different shortcut trajectories for population transfer and for the initialization and transfer of coherent superpositions. We reveal that SATD protocols exhibit robustness to dissipation and experimental uncertainty, and can be optimized when these effects are present. These results motivate STA as a promising tool for controlling open quantum systems comprising individual or hybrid nanomechanical, superconducting, and photonic elements in the solid state.
description: 20 pages, 4 figures
Straws in the wind : the construction of technical and further education in Victoria 1945-1985
Creators: name: Rushbrook, Peter W.J.
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.
Hubble constant by natural selection: Evolution chips in the Hubble tension
Creators: name: Bernardo, Reginald Christian
name: Lee, You-Ru
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Approximate Bayesian Computation (ABC) algorithm considers natural selection in biology as a guiding principle for statistical model selection and parameter estimation. We take this ABC approach to cosmology and use it to infer which model anchored on a choice of a Hubble constant prior would be preferred by the data. We find in all of our runs that the Planck Hubble constant ($H_0 = 67.4 \pm 0.5$ km s$^{-1}$Mpc$^{-1}$) always emerge naturally selected by the ABC over the SH$0$ES estimate ($H_0 = 73.30 \pm 1.04$ km s$^{-1}$Mpc$^{-1}$). The result holds regardless of how we mix our data sets, including supernovae, cosmic chronometers, baryon acoustic oscillations, and growth data. Compared with the traditional MCMC, we find that the ABC always results with narrower cosmological constraints, but remain consistent inside the corresponding MCMC posteriors.
description: 14 pages + refs, 7 figures, v3: discussion improved, new section added on ABC prior dependence, to appear in ASCOM, our codes in https://github.com/reggiebernardo/notebooks/tree/main/supp_ntbks_arxiv.2212.02203
Infinite and finite dimensional generalized Hilbert tensors
Creators: name: Mei, Wei
name: Song, Yisheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: In this paper, we introduce the concept of an $m$-order $n$-dimensional generalized Hilbert tensor $\mathcal{H}_{n}=(\mathcal{H}_{i_{1}i_{2}\cdots i_{m}})$, $$ \mathcal{H}_{i_{1}i_{2}\cdots i_{m}}=\frac{1}{i_{1}+i_{2}+\cdots i_{m}-m+a},\ a\in \mathbb{R}\setminus\mathbb{Z}^-;\ i_{1},i_{2},\cdots,i_{m}=1,2,\cdots,n, $$ and show that its $H$-spectral radius and its $Z$-spectral radius are smaller than or equal to $M(a)n^{m-1}$ and $M(a)n^{\frac{m}{2}}$, respectively, here $M(a)$ is a constant only dependent on $a$. Moreover, both infinite and finite dimensional generalized Hilbert tensors are positive definite for $a\geq1$. For an $m$-order infinite dimensional generalized Hilbert tensor $\mathcal{H}_{\infty}$ with $a>0$, we prove that $\mathcal{H}_{\infty}$ defines a bounded and positively $(m-1)$-homogeneous operator from $l^{1}$ into $l^{p}\ (1
description: 15 pages
Theoretical systematics in testing the Cosmological Principle with the kinematic quasar dipole
Creators: name: Guandalin, Caroline
name: Piat, Jade
name: Clarkson, Chris
name: Maartens, Roy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Cosmological Principle is part of the foundation that underpins the standard model of the Universe. In the era of precision cosmology, when stress tests of the standard model are uncovering various tensions and possible anomalies, it is critical to check the viability of this principle. A key test is the consistency between the kinematic dipoles of the cosmic microwave background and of the large-scale matter distribution. Results using radio continuum and quasar samples indicate a rough agreement in the directions of the two dipoles, but a larger than expected amplitude of the matter dipole. The resulting tension with the radiation dipole has been estimated at $\sim 5σ$ for some cases, suggesting a potential new cosmological tension and a possible violation of the CP. However, the standard formalism for predicting the dipole in the two-dimensional projection of sources overlooks possible evolution effects in the luminosity function. In fact, radial information from the luminosity function is necessary for a correct projection of the three-dimensional source distribution. Using a variety of current models of the quasar luminosity function, we show that neglecting redshift evolution can significantly overestimate the relative velocity amplitude. While the models we investigate are consistent with each other and with current data, the dipole derived from these, which depends on derivatives of the luminosity function, can disagree by more than $3σ$. This theoretical systematic bias needs to be resolved before robust conclusions can be made about a new cosmic tension.
description: 13 pages, 3 figures, 2 tables. Version published in The Astrophysical Journal
The absence of Ginzburg-Landau mechanism for vestigial order in the normal phase above a two-component superconductor
Creators: name: How, Pye Ton
name: Yip, Sung Kit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A two-component superconductor may hypothetically support a vestigial order phase above its superconducting transition temperature, with rotational or time-reversal symmetry spontaneously broken while remain non-superconducting. This has been suggested as an explanation to the observed normal state nematicity of the nematic superconductor $M_x$Bi$_2$Se$_3$. We examine the condition for this vestigial order to occur within Ginzburg-Landau theory with order parameter fluctuations, on both the nematic and chiral sides of the theory. Contrary to prior theoretical results, we rule out a large portion of parameter space for possible vestigial order. We argue that very extreme anisotropy is one prerequisite for a stable vestigial phase, which is likely not met in real materials.
description: 14 pages, 7 figures; the accepted version
A call for scientists to halt the spoiling of the night sky with artificial light and satellites
Creators: name: Falchi, Fabio
name: Bará, Salvador
name: Cinzano, Pierantonio
name: Lima, Raul C.
name: Pawley, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Unfettered access to dark night skies is rapidly diminishing, due to light pollution and satellite mega-constellations tracks. Scientists should wake up and do more to stand up to Big Light and Big Space and preserve this natural resource.
description: 5 pages; not edited version of the manuscript published in Nature Astronomy
Slow-Roll Inflation in the Jordan Frame
Creators: name: Karčiauskas, Mindaugas
name: Díaz, José Jaime Terente
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Inflation models based on scalar-tensor theories of gravity are formulated in the Jordan frame but most often analysed in the Einstein frame. The transformation between the frames is not always desirable. In this work we formulate slow-roll conditions in the Jordan frame. This is achieved by comparing different background quantities and approximations on the same spatial slice in both frames. We use these approximations to derive simple equations that can be applied to compute inflation model observables in terms of Jordan frame quantities only. Finally, we apply some of the results to analyse generalised induced gravity models and compare them with the latest observations.
description: 28 pages, 6 figures
Matrix Quantum Mechanics from Qubits
Creators: name: Hartnoll, Sean A.
name: Huijse, Liza
name: Mazenc, Edward A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a transverse field Ising model with order N^2 spins interacting via a nonlocal quartic interaction. The model has an O(N,Z), hyperoctahedral, symmetry. We show that the large N partition function admits a saddle point in which the symmetry is enhanced to O(N). We further demonstrate that this `matrix saddle' correctly computes large N observables at weak and strong coupling. The matrix saddle undergoes a continuous quantum phase transition at intermediate couplings. At the transition the matrix eigenvalue distribution becomes disconnected. The critical excitations are described by large N matrix quantum mechanics. At the critical point, the low energy excitations are waves propagating in an emergent 1+1 dimensional spacetime.
description: 28 pages + Appendices and References. 3 Figures
Inflation caused by a potential valley with CP violation
Creators: name: Suematsu, Daijiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose an inflation scenario caused by an inflaton identified with a potential valley which brings about $CP$ violation in the standard model (SM). If singlet scalars have nonminimal couplings with the Ricci scalar in a suitable way, favorable inflation could be derived through the potential valley composed of such scalars. We study dynamics of the scalars during and after the inflation, which suggests that it could be described as a single field inflation approximately. If these scalars make suitable ingredients of the SM couple with vectorlike fermions and right-handed neutrinos, a CKM phase could be induced and also leptogenesis could occur successfully even at a rather low reheating temperature.
description: 32 pages, 5 figures, several clarifications, some references added, a published version
Participation in government disability advisory bodies in Australia: An Intellectual Disability perspective
Creators: name: Frawley, Patsie
Publisher: name: La Trobe
Year: 2023

description: Abstract: This qualitative study examined the participatory experiences of people with an intellectual disability as members of government disability advisory bodies in Australia. These forums are one of the strategies adopted by governments to enable people with an intellectual disability to participate in the formulation of social policy. Such opportunities have arisen from progressive policy that frames people with an intellectual disability as full citizens with equal rights to inclusion and participation in society. Little research has considered how people with an intellectual disability experience the participatory opportunities that have grown from this recognition of their rights. This reflects the more traditional focus on their status and participation as consumers and service users. The central question of this study is how people with an intellectual disability experience participation in government advisory bodies, and how such forums can be inclusive and meaningful.This study positions people with an intellectual disability as the experts about their own experiences by relying primarily on their first person accounts of their experiences. Ethnographic and case study methods were employed including in-depth interviews with the central participants, document analysis, observation of the work of the advisory bodies and interviews with others involved in advisory bodies Analysis led to the development of a typology of participation that describes the political and personal orientations people have to participation. The study found that structures and the processes used by advisory bodies can mediate people's experiences: however more significantly, the experiences of people with intellectual disability are shaped by their perception of how they are regarded by others.Central to this is the efficacy of support based on the development of collegiate relationships, similar to the notion of civic friendship described by Reinders (2002), rather than support that is solely focussed on tangible accommodations. The study concludes that citizen participation bodies have not fully recognised the personal and political potential of members with an intellectual disability. It presents evidence that people with an intellectual disability are capable of this form of participation, can provide legitimate and informed perspectives on policy and can engage meaningfully, given full recognition of their capacity to participate as well as structures and processes that enable this.

Originally part of the Australasian Digital Theses (ADT) database.

Submission note: A thesis submitted in total fulfilment for the requirements for the degree of Doctor of Philosophy [to the School of Social Work and Social Policy], Faculty of Health Sciences, La Trobe University, Bundoora.
Training in spatial skills requiring two- and three-dimensional thinking and different levels of internalization, and the retention and transfer of these skills
Creators: name: Rowe, Margaret I.
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.
Resonant Meta-atoms with Nonlinearities on Demand
Creators: name: Filonov, Dmitry
name: Kramer, Yotam
name: Kozlov, Vitali
name: Malomed, Boris A.
name: Ginzburg, Pavel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Nonlinear light-matter interactions and their applications are constrained by properties of available materials. The use of metamaterials opens the way to achieve precise control over electromagnetic properties at a microscopic level, providing new tools for experimental studies of complex nonlinear phenomena in photonics. Here a doubly resonant nonlinear meta-atom is proposed, analyzed and characterized in the GHz spectral range. The underlying structure is composed of a pair of split rings, resonant at both fundamental and nonlinear frequencies. The rings share a varactor diode, which serves as a microscopic source of nonlinearity. Flexible control over the coupling and near- and far-field patterns are reported, favoring the doubly resonant structure over other realizations. Relative efficiencies of the second and third harmonics, generated by the diode, are tailored by dint of the double-ring geometry, providing a guideline for selecting one frequency against another, using the design of the auxiliary structures. The on-demand control over the microscopic nonlinear properties enables developing a toolbox for experimental emulation of complex nonlinear phenomena.
Theory of Inclusive B Decays
Creators: name: Paz, Gil
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this talk I briefly review the current status of the theory of the inclusive $B$ decays: $\bar B\to X_c\, \ell\,\barν_\ell$, $\bar B\to X_u\, \ell\,\barν_\ell$, and $\bar B\to X_s\,γ$. I try to answer three questions: what is the current "state of the art", can the theoretical prediction be improved, and will it lead to a smaller theoretical uncertainty.
description: Talk presented at the 8th Workshop on Theory, Phenomenology and Experiments in Flavour Physics: Neutrinos, Flavor Physics and Beyond (FP- Capri22)
On the combined use of GW approximation and cumulant expansion in the calculations of quasiparticle spectra: The paradigm of Si valence bands
Creators: name: Gumhalter, Branko
name: Kovač, Vjekoslav
name: Caruso, Fabio
name: Lambert, Henry
name: Giustino, Feliciano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Since the earliest implementations of the various GW approximations and cumulant expansion in the calculations of quasiparticle propagators and spectra, several attempts have been made to combine the advantageous properties and results of these two theoretical approaches. While the GW plus cumulant approach has proven successful in interpreting photoemission spectroscopy data in solids, the formal connection between the two methods has not been investigated in detail. By introducing a general bijective integral representation of the cumulants, we can rigorously identify at which point these two approximations can be connected for the paradigmatic model of quasiparticle interaction with the dielectric response of the system that has been extensively exploited in recent interpretations of the satellite structures in photoelectron spectra. We establish a protocol for consistent practical implementation of the thus established GW+cumulant scheme, and illustrate it by comprehensive state-of-the-art first-principles calculations of intrinsic angle-resolved photoemission spectra from Si valence bands.
description: 18 pages, 4 figures
Building Modern States: Industrialization in Norway and Malaysia
Creators: name: Vivian, Leighton
Publisher: name: La Trobe
Year: 2023

description: This thesis sets out to apply a corrective to the views that modern state development is a result of war-making or solely a consequence of global capitalism. These and other perspectives on the state and its modern development have rarely directly engaged with industrialization as a unique form of economic change and as imperative to modern state development. Theories on the developmental state have come closest to identifying how industrialization as a process impacts upon and shapes state development. Industrialization has been the major imperative for the development of the modern Norwegian and Malaysian states in the twentieth century. Industrialization gave rise to powerful social organizations representing a range of interests. As industrial development proceeded, these organizations orientated toward the state. In turn, institutions of the modern state emerged and developed around the industrialization process and the problems and changes it produced. In both case studies, the state also managed industrialization as a political project. This project was carried out by the state attempting to variously regulate, direct or manage the key components of the industrialization process. These components included foreign investment, the banking sector and labour relations. Industrialization saw the state extend its control into areas of banking, capital flows and relations between key social groups. Modern state development in the twentieth century must be understood as a result of industrialization as an economic process and a political project by the state. Perspectives on modern state development must qualify accounts of war-making and capitalism to construct a more variable model. An approach that identifies key organizations as powerful social actors, must in addition understand the modern state as a powerful actor also. Industrialization builds the modern state with its many sites of power that increases regulation and management of economic processes.
Challenges in Using mHealth Data From Smartphones and Wearable Devices to Predict Depression Symptom Severity: Retrospective Analysis
Creators: name: Sun, Shaoxiong
name: Folarin, Amos A.
name: Zhang, Yuezhou
name: Cummins, Nicholas
name: Garcia-Dias, Rafael
name: Stewart, Callum
name: Ranjan, Yatharth
name: Rashid, Zulqarnain
name: Conde, Pauline
name: Laiou, Petroula
name: Sankesara, Heet
name: Matcham, Faith
name: Leightley, Daniel
name: White, Katie M.
name: Oetzmann, Carolin
name: Ivan, Alina
name: Lamers, Femke
name: Siddi, Sara
name: Simblett, Sara
name: Nica, Raluca
name: Rintala, Aki
name: Mohr, David C.
name: Myin-Germeys, Inez
name: Wykes, Til
name: Haro, Josep Maria
name: Penninx, Brenda W. J. H.
name: Vairavan, Srinivasan
name: Narayan, Vaibhav A.
name: Annas, Peter
name: Hotopf, Matthew
name: Dobson, Richard J. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: A number of challenges exist for the analysis of mHealth data: maintaining participant engagement over extended time periods and therefore understanding what constitutes an acceptable threshold of missing data; distinguishing between the cross-sectional and longitudinal relationships for different features to determine their utility in tracking within-individual longitudinal variation or screening individuals at high risk; and understanding the heterogeneity with which depression manifests itself in behavioral patterns quantified by the passive features. From 479 participants with MDD, we extracted 21 features capturing mobility, sleep, and smartphone use. We investigated the impact of the number of days of available data on feature quality using the intraclass correlation coefficient and Bland-Altman analysis. We then examined the nature of the correlation between the 8-item Patient Health Questionnaire (PHQ-8) depression scale (measured every 14 days) and the features using the individual-mean correlation, repeated measures correlation, and linear mixed effects model. Furthermore, we stratified the participants based on their behavioral difference, quantified by the features, between periods of high (depression) and low (no depression) PHQ-8 scores using the Gaussian mixture model. We demonstrated that at least 8 (range 2-12) days were needed for reliable calculation of most of the features in the 14-day time window. We observed that features such as sleep onset time correlated better with PHQ-8 scores cross-sectionally than longitudinally, whereas features such as wakefulness after sleep onset correlated well with PHQ-8 longitudinally but worse cross-sectionally. Finally, we found that participants could be separated into 3 distinct clusters according to their behavioral difference between periods of depression and periods of no depression.
Study about musical structure parameters which have influence in a tapping task
Creators: name: Cupellini, Enrico
Publisher: name: Zenodo
Year: 2005
Subjects: music cognition
rhythm entrainment
non-isochronous meters

description: Our investigation was aimed at improving the comprehension of asymmetrical rhythms. Specifically, our study is one of the few to date focussing on cognition of asymmetrical meters and, as far as we know, the only study considering free tapping in relation to such meters. In this study, we used real musical pieces. By using a digital editing procedure of sound signal, we manipulated various accent structures independently, and investigated their role in decoding rhythmic expression. This allowed us to investigate behavioural synchronization on the basis of a natural expressive variability, without the need for artificial stimuli. A software capable of precisely recording the tapping sessions was created, and a sound analytic methodology was proposed, supporting and extending our knowledge of the topic. The work proved that the presumptive advantage of musicians (as compared to non-musicians) in synchronization behaviour fails in an intercultural context. Mental schemes built up during an educational training are specific to one’s own cultural reference system, while they might not be beneficial in understanding unfamiliar structures. A further element still unclear in cognitive research was the role melodic, timbral and dynamic structures play in rhythm detection and temporal variability. The present study demonstrated that our cognitive system is capable of using such structural information in a flexible way, for instance by discarding an incoherent structure in presence of conflicting conditions and reorienting towards other structures. Our cognitive system is also capable of extracting rhythm and timing by using one single accent structure (either melodic, timbral or dynamic structure), when it is consistent with one’s own cultural schemes. Finally, or results show that a musical piece whose temporal variability is consistent with its metrical structure allows a synchronization comparable to versions of the same piece without temporal variability. Such evidence, although inconsistent with a previous study (Drake, Penel & Bigand, 2000), supports the idea that behavioural synchronization occurs in human communication, which is made up of variable rhythms, rather than of metronomic durations.
Overflow of a dipolar exciton trap at high magnetic fields
Creators: name: Dietl, S.
name: Kowalik-Seidl, K.
name: Schuh, D.
name: Wegscheider, W.
name: Holleitner, A. W.
name: Wurstbauer, U.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study laterally trapped dipolar exciton ensembles in coupled GaAs quantum wells at high magnetic fields in the Faraday configuration. In photoluminescence experiments, we identify three magnetic field regimes. At low fields, the exciton density is increased by a reduced charge carrier escape from the trap, and additionally, the excitons' emission energy is corrected by a positive diamagnetic shift. At intermediate fields, magnetic field dependent correction terms apply which follow the characteristics of a neutral magnetoexciton. Due to a combined effect of an increasing binding energy and lifetime, the exciton density is roughly doubled from zero to about seven Tesla. At the latter high field value, the charge carriers occupy only the lowest Landau level. In this situation, the exciton trap can overflow independently from the electrostatic depth of the trapping potential, and the energy shift of the excitons caused by the so-called quantum confined Stark effect is effectively compensated. Instead, the exciton energetics seem to be driven by the magnetic field dependent renormalization of the many-body interaction terms. In this regime, the impact of parasitic in-plane fields at the edge of trapping potential is eliminated.
description: 18 pages, 4 figures
End-to-end AI framework for interpretable prediction of molecular and crystal properties
Creators: name: Park, Hyun
name: Zhu, Ruijie
name: Huerta, E. A.
name: Chaudhuri, Santanu
name: Tajkhorshid, Emad
name: Cooper, Donny
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.2

description: We introduce an end-to-end computational framework that allows for hyperparameter optimization using the DeepHyper library, accelerated model training, and interpretable AI inference. The framework is based on state-of-the-art AI models including CGCNN, PhysNet, SchNet, MPNN, MPNN-transformer, and TorchMD-NET. We employ these AI models along with the benchmark QM9, hMOF, and MD17 datasets to showcase how the models can predict user-specified material properties within modern computing environments. We demonstrate transferable applications in the modeling of small molecules, inorganic crystals and nanoporous metal organic frameworks with a unified, standalone framework. We have deployed and tested this framework in the ThetaGPU supercomputer at the Argonne Leadership Computing Facility, and in the Delta supercomputer at the National Center for Supercomputing Applications to provide researchers with modern tools to conduct accelerated AI-driven discovery in leadership-class computing environments. We release these digital assets as open source scientific software in GitLab, and ready-to-use Jupyter notebooks in Google Colab.
description: 20 pages, 10 images, 6 tables; v2: accepted to Machine Learning: Science and Technology
Final agreement and sustainable peace between the FARC and the Colombian government
Creators: name: Faehrmann, Alicia
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: After four years of negotiations between the FARC and the Colombian Government, the Acuerdo final para la terminación del conflicto y la construcción de una paz estable y duradera (Final agreement for the termination of the conflict and the construction of a stable and lasting peace, ‘the final agreement’) was settled and the FARC ended their armed insurgency in favour of a political route. The final agreement proposes reforms and mechanisms for ending the conflict between the FARC and the Government and building sustainable peace in Colombia. Despite this promising future, it is uncertain how the peace process as a whole will impact Colombian politics, economics and society and achieve sustainable peace. Due to the history of violent political, social and economic exclusion of the FARC and the classes they represent, which lay at the origins and crux of the conflict, I argue that peace in Colombia will be sustainable once political, social and economic inclusion is achieved. The purpose of this investigation is to understand how the final agreement proposes to make peace sustainable in Colombia through political, social and economic inclusion and analyse whether the accords can achieve the goal of a stable and lasting peace. I conclude that without a rigorous implementation plan for achieving political, social and economic inclusion, the final agreement cannot achieve sustainable peace in Colombia.
Towards End-to-End Private Automatic Speaker Recognition
Creators: name: Teixeira, Francisco
name: Abad, Alberto
name: Raj, Bhiksha
name: Trancoso, Isabel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Cryptography and Security (cs.CR)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The development of privacy-preserving automatic speaker verification systems has been the focus of a number of studies with the intent of allowing users to authenticate themselves without risking the privacy of their voice. However, current privacy-preserving methods assume that the template voice representations (or speaker embeddings) used for authentication are extracted locally by the user. This poses two important issues: first, knowledge of the speaker embedding extraction model may create security and robustness liabilities for the authentication system, as this knowledge might help attackers in crafting adversarial examples able to mislead the system; second, from the point of view of a service provider the speaker embedding extraction model is arguably one of the most valuable components in the system and, as such, disclosing it would be highly undesirable. In this work, we show how speaker embeddings can be extracted while keeping both the speaker's voice and the service provider's model private, using Secure Multiparty Computation. Further, we show that it is possible to obtain reasonable trade-offs between security and computational cost. This work is complementary to those showing how authentication may be performed privately, and thus can be considered as another step towards fully private automatic speaker recognition.
description: Accepted for publication at Interspeech 2022
Supermultiplet of $β-$deformations from twistors
Creators: name: Milián, Segundo P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the supermultiplet of linearized beta-deformation of $\mathcal{N}=4$ Super Yang-Mills(SYM). It was previously studied on the gravitational side. We study the supermultiplet of beta-deformations on the field theory side and we compare two finite-dimensional representations of $psl(4|4,\bf{R})$ algebra. We show that they are related by an intertwining operator. We develop a twistor-based approach which could be useful for studying other finite-dimensional and nonunitary representations in AdS/CFT correspondence.
A microanalysis of the effects of cost, need and features of the context upon preschool children's helping behaviour
Creators: name: Rodd, Jillian
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.
Using Rewrite Strategies for Efficient Functional Automatic Differentiation
Creators: name: Böhler, Timon
name: Richter, David
name: Mezini, Mira
Publisher: name: arXiv
Year: 2023
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Automatic Differentiation (AD) has become a dominant technique in ML. AD frameworks have first been implemented for imperative languages using tapes. Meanwhile, functional implementations of AD have been developed, often based on dual numbers, which are close to the formal specification of differentiation and hence easier to prove correct. But these papers have focussed on correctness not efficiency. Recently, it was shown how an approach using dual numbers could be made efficient through the right optimizations. Optimizations are highly dependent on order, as one optimization can enable another. It can therefore be useful to have fine-grained control over the scheduling of optimizations. One method expresses compiler optimizations as rewrite rules, whose application can be combined and controlled using strategy languages. Previous work describes the use of term rewriting and strategies to generate high-performance code in a compiler for a functional language. In this work, we implement dual numbers AD in a functional array programming language using rewrite rules and strategy combinators for optimization. We aim to combine the elegance of differentiation using dual numbers with a succinct expression of the optimization schedule using a strategy language. We give preliminary evidence suggesting the viability of the approach on a micro-benchmark.
description: to be published in FTfJP 2023
Cultural differences in the expression of opinion: a comparison of interactional strategies in French and Australian English discourse
Creators: name: Mullan, Kerry
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 470411
subject: Sociolinguistics

description: Submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Communication, Arts and Critical Enquiry, Faculty of Humanities and Social Sciences, La Trobe University, Victoria, Australia. Associated work "LaTrobeCSAusE" ( La Trobe Corpus of Spoken Australian English) - a collection of recordings of spoken interaction amongst Australian speakers of English (some in conversation with native French speakers speaking English) made in Melbourne from 2001 to 2002, with transcriptions: https://doi.org/10.26181/23089559
Intrinsic nonlinear Hall effect and gate-switchable Berry curvature sliding in twisted bilayer graphene
Creators: name: Huang, Meizhen
name: Wu, Zefei
name: Zhang, Xu
name: Feng, Xuemeng
name: Zhou, Zishu
name: Wang, Shi
name: Chen, Yong
name: Cheng, Chun
name: Sun, Kai
name: Meng, Zi Yang
name: Wang, Ning
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Though the observation of the quantum anomalous Hall effect and nonlocal transport response reveals nontrivial band topology governed by the Berry curvature in twisted bilayer graphene, some recent works reported nonlinear Hall signals in graphene superlattices that are caused by the extrinsic disorder scattering rather than the intrinsic Berry curvature dipole moment. In this work, we report a Berry curvature dipole induced intrinsic nonlinear Hall effect in high-quality twisted bilayer graphene devices. We also find that the application of the displacement field substantially changes the direction and amplitude of the nonlinear Hall voltages, as a result of a field-induced sliding of the Berry curvature hotspots. Our work not only proves that the Berry curvature dipole could play a dominant role in generating the intrinsic nonlinear Hall signal in graphene superlattices with low disorder densities, but also demonstrates twisted bilayer graphene to be a sensitive and fine-tunable platform for second harmonic generation and rectification.
Sweat from the Bones: Politics, Chinese Acrobatics and Australia
Creators: name: Farrell, Rosemary
Publisher: name: La Trobe
Year: 2023

description: Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Communication and Critical Enquiry, Faculty of Humanities and Social Sciences, La Trobe University, Bundoora, Victoria, Australia.
On possible wormhole solutions supported by non-commutative geometry within $f(R, L_m)$ gravity
Creators: name: Kavya, N. S.
name: Venkatesha, V.
name: Mustafa, G.
name: Sahoo, P. K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Non-commutativity is a key feature of spacetime geometry. The current article explores the traversable wormhole solutions in the framework of $f(R,L_m)$ gravity within non-commutative geometry. By using the Gaussian and Lorentzian distributions, we construct tideless wormholes for the nonlinear $f(R,L_m)$ model $f(R,L_m)=\dfrac{R}{2}+L_m^α$. For both cases, we derive shape functions and discuss the required different properties with satisfying behavior. For the required wormhole properties, we develop some new constraints. The influence of the involved model parameter on energy conditions is analyzed graphically which provides a discussion about the nature of exotic matter. Further, we check the physical behavior regarding the stability of wormhole solutions through the TOV equation. An interesting feature regarding the stability of the obtained solutions via the speed of sound parameters within the scope of average pressure is discussed. Finally, we conclude our results.
description: AOP accepted version