cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An unsupervised learning algorithm for computer vision-based blind modal parameters identification of output-only structures from video measurements
Creators: name: Allada, Vishal
name: Saravanan, T. Jothi
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Operational modal analysis (OMA) is required to maintain large-scale and necessary civil infrastructures. The non-contact method of OMA using digital image correlation and point tracking algorithms requires a speckle pattern placed on the structure. Alternatively, advanced computer vision methods like optical flow and phase-based video motion magnification (PBVMM) techniques are used to measure modal parameters. Despite the importance of PBVMM, the users should know the range of frequencies in which the natural structure frequency lies. A methodology based on an unsupervised machine learning technique is developed to extract the modal parameters blindly from its recorded digital video. The proposed methodology uses complex steerable pyramids and an unsupervised machine learning technique, also known as principal component analysis, and analytical mode decomposition with a random decrement technique to blindly extract the modal parameters of a structure. This study validated the proposed methodology using a multi-degree of freedom (DOF) numerical model. The results are compared with theoretical and estimated values and are in good agreement. Furthermore, it is implemented on a laboratory benchmark SDOF, MDOF, and real-time videos of the London Millennium and Tacoma Narrows bridges for blindly extracting the modal frequencies and damping ratios.
The electromagnetic form factors of the $Λ$ in the timelike region
Creators: name: Haidenbauer, J.
name: Meißner, U. -G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The reaction $e^+e^- \to \bar ΛΛ$ is investigated for energies close to the threshold. Specific emphasis is put on the role played by the interaction in the final $\bar ΛΛ$ system which is taken into account rigorously. For that interaction a variety of $\bar ΛΛ$ potential models is employed that have been constructed for the analysis of the reaction $\bar p p \to \bar ΛΛ$ in the past. The enhancement of the effective form factor for energies close to the $\bar ΛΛ$ threshold, seen in pertinent experiments, is reproduced. Predictions for the $Λ$ electromagnetic form factors $G_M$ and $G_E$ in the timelike region and for spin-dependent observables such as spin-correlation parameters are presented.
description: 8 pages, 4 figures
Toward Ambient Intelligence: Federated Edge Learning with Task-Oriented Sensing, Computation, and Communication Integration
Creators: name: Liu, Peixi
name: Zhu, Guangxu
name: Wang, Shuai
name: Jiang, Wei
name: Luo, Wu
name: Poor, H. Vincent
name: Cui, Shuguang
Publisher: name: arXiv
Year: 2022
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: In this paper, we address the problem of joint sensing, computation, and communication (SC$^{2}$) resource allocation for federated edge learning (FEEL) via a concrete case study of human motion recognition based on wireless sensing in ambient intelligence. First, by analyzing the wireless sensing process in human motion recognition, we find that there exists a thresholding value for the sensing transmit power, exceeding which yields sensing data samples with approximately the same satisfactory quality. Then, the joint SC$^{2}$ resource allocation problem is cast to maximize the convergence speed of FEEL, under the constraints on training time, energy supply, and sensing quality of each edge device. Solving this problem entails solving two subproblems in order: the first one reduces to determine the joint sensing and communication resource allocation that maximizes the total number of samples that can be sensed during the entire training process; the second one concerns the partition of the attained total number of sensed samples over all the communication rounds to determine the batch size at each round for convergence speed maximization. The first subproblem on joint sensing and communication resource allocation is converted to a single-variable optimization problem by exploiting the derived relation between different control variables (resources), which thus allows an efficient solution via one-dimensional grid search. For the second subproblem, it is found that the number of samples to be sensed (or batch size) at each round is a decreasing function of the loss function value attained at the round. Based on this relationship, the approximate optimal batch size at each communication round is derived in closed-form as a function of the round index. Finally, extensive simulation results are provided to validate the superiority of the proposed joint SC$^{2}$ resource allocation scheme.
description: 13 pages, submitted to IEEE for possible publication
New Zealand beef and sheep supply relationships : an econometric application of joint firm/household decision making
Creators: name: Rich, Michael M.
Publisher: name: Monash University
Year: 2022

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.
D3.3 Crowd-based travel expert service
Creators: name: Mariorenzi, Luca
name: Salviati, SImoni
name: Lisi, Diego
name: Caiello, Enrica
Publisher: name: Zenodo
Year: 2023

description: This deliverable describes the results of Task 3.3. formally known as Crowd Based Travek Service Provider, developed in the scope of the Ride2Rail project.
An efficient multiple imputation algorithm for control-based and delta-adjusted pattern mixture models using SAS
Creators: name: Tang, Yongqiang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: In clinical trials, mixed effects models for repeated measures (MMRM) and pattern mixture models (PMM) are often used to analyze longitudinal continuous outcomes. We describe a simple missing data imputation algorithm for the MMRM that can be easily implemented in standard statistical software packages such as SAS PROC MI. We explore the relationship of the missing data distribution in the control-based and delta-adjusted PMMs with that in the MMRM, and suggest an efficient imputation algorithm for these PMMs. The unobserved values in PMMs can be imputed by subtracting the mean difference in the posterior predictive distributions of missing data from the imputed values in MMRM. We also suggest a modification of the copy reference imputation procedure to avoid the possibility that after dropout, subjects from the active treatment arm will have better mean response trajectory than subjects who stay on the active treatment. The proposed methods are illustrated by the analysis of an antidepressant trial.
description: 27 pages
Robust Adaptive Beamforming via Worst-Case SINR Maximization with Nonconvex Uncertainty Sets
Creators: name: Huang, Yongwei
name: Fu, Hao
name: Vorobyov, Sergiy A.
name: Luo, Zhi-Quan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper considers a formulation of the robust adaptive beamforming (RAB) problem based on worst-case signal-to-interference-plus-noise ratio (SINR) maximization with a nonconvex uncertainty set for the steering vectors. The uncertainty set consists of a similarity constraint and a (nonconvex) double-sided ball constraint. The worst-case SINR maximization problem is turned into a quadratic matrix inequality (QMI) problem using the strong duality of semidefinite programming. Then a linear matrix inequality (LMI) relaxation for the QMI problem is proposed, with an additional valid linear constraint. Necessary and sufficient conditions for the tightened LMI relaxation problem to have a rank-one solution are established. When the tightened LMI relaxation problem still has a high-rank solution, the LMI relaxation problem is further restricted to become a bilinear matrix inequality (BLMI) problem. We then propose an iterative algorithm to solve the BLMI problem that finds an optimal/suboptimal solution for the original RAB problem by solving the BLMI formulations. To validate our results, simulation examples are presented to demonstrate the improved array output SINR of the proposed robust beamformer.
Effect of stress-strain models and sectional analysis methods on the axial-flexural interactions of discontinuously FRP strengthened square RC columns
Creators: name: Duc, Anh
name: Sheikh, M. Neaz
name: Hadi, Muhammad N. S.
name: Pham, Anh Duc
name: Ngo, Ngoc Tri
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health
subject: Virology

description: This study analytically investigated the axial-flexural (P-M) interactions of quare reinforced concrete (RC) columns discontinuously strengthened swith fibre reinforced polymers (FRP). Six FRP confined concrete stress-strain models and two sectional analysis methods were used to develop the analytical P-M interactions of discontinuously FRP strengthened square RC columns. The developed analytical P-M interactions were validated against experimental data available in the literature. It was found that the selection of the stress-strain models had a substantial effect on the analytical P-M interactions, while the influence of the sectional analysis methods heavily depended on the selected stress-strain models. It was also found that the three available design codes for concrete structures externally strengthened with FRP yielded different analytical P-M interactions of discontinuously FRP strengthened square RC columns. A parametric analysis was undertaken and found that the corner radius and confinement ratio significantly affected the P-M interactions of discontinuously FRP strengthened square RC columns. Also, discontinuously FRP strengthened square RC columns with a higher number of FRP layers and smaller corner radius obtained lower flexural and axial strengths than their counterparts with a lower number of CFRP layers and higher corner radius.
Characterization of base roughness for granular chute flows
Creators: name: Jing, Lu
name: Kwok, C. Y.
name: Leung, Y. F.
name: Sobral, Y. D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Base roughness plays an important role to the dynamics of granular flows but is yet poorly understood due to the difficulty of its quantification. For a bumpy base made by spheres, at least two factors should be considered to characterize its geometric roughness, namely the size ratio of base- to flow-particles and the packing of base particles. In this paper, we propose a definition of base roughness, Ra, which is a function of both the size ratio and the packing arrangement of base particles. The function is generalized for random and regular packing of multi-layered spheres, where the range of possible values of Ra is studied, along with the optimal values to create maximum base roughness. The new definition is applied to granular flows down chute in both two- and three-dimensional configurations. It is proven to be a good indicator of slip condi- tion, and a transition occurs from slip to non-slip condition as Ra increases. Critical values of Ra are identified for the construction of a non-slip base. The effects of contact parameters on base velocity are studied, and it is shown that while the coefficient of friction is less influential, normal damping has more profound effect on base velocity at lower values of Ra. The application of present definition to other base geometries is also discussed.
description: 18 figures
Correlation length of the angular mode for an approximate $U(1)$ symmetry during inflation
Creators: name: Han, Chengcheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is known that a light scalar field obtains fluctuations in the de Sitter inflationary background. Such fluctuations could provide an initial condition for baryogenesis through the Affleck-Dine mechanism, where an approximate $U(1)_B$ symmetry is usually assumed. However, an interpretation of the baryon number generation in this way is strongly related to the correlation length of the angular mode. In this work, we calculate the correlation length of the angular mode for a model exhibiting an approximate $U(1)$ symmetry. We find that for a massive nearly non-interacting field, the correlation length of the angular mode is determined by the mass parameter of the model and it is similar to $H^{-1} \exp(H^2/m^2)$. Applying this result to baryogenesis via the Affleck-Dine mechanism with a stochastic origin, we find that only for $m \ll \mathcal O(0.1) H$(assuming $N_*=60$) can the correlation length of the baryon number density be much larger than our current horizon size, such that we live in the baryon-rich region. If this is not true, in the early time our universe would consist of numerous patches of baryon-rich and anti-baryon-rich regions with the average baryon number being nearly zero.
description: 15 pages, 2 figures, version accepted by Physics Letter B
An evaluation of the liquidity-hedging hypothesis of the market segmentation theory of the term structure of interest rates, the Australian Government securities market : June 1965-June 1975
Creators: name: McGinley, Leslie R.
Publisher: name: Monash University
Year: 2022

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.
Constraining warm dark matter mass with cosmic reionization and gravitational wave
Creators: name: Tan, W. W.
name: Wang, F. Y.
name: Cheng, K. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We constrain the warm dark matter (WDM) particle mass with the observations of cosmic reionization and CMB optical depth. We suggest that the GWs from stellar mass black holes (BHs) could give a further constraint on WDM particle mass for future observations. The star formation rates (SFRs) of Population I/II (Pop I/II) and Population III (Pop III) stars are also derived. If the metallicity of the universe have been enriched beyond the critical value of $Z_{\rm crit}=10^{-3.5}Z_{\odot}$, the star formation shift from Pop III to Pop I/II stars. Our results show that the SFRs are quite dependent on the WDM particle mass, especially at high redshifts. Combing with the reionization history and CMB optical depth derived from the recent \emph{Planck} mission, we find that the current data requires the WDM particle mass in a narrow range of $1 < m_x < 3$ keV. Furthermore, we suggest that the stochastic gravitational wave background (SGWB) produced by stellar BHs could give a further constraint on the WDM particle mass for future observations. For $m_{x}=3$ keV with Salpeter (Chabrier) initial mass function (IMF), the SGWB from Pop I/II BHs has a peak amplitude of $Ω_{\rm GW}\approx2.8\times 10^{-9}~(5.0\times 10^{-9})$ at $f= 316 {\rm Hz}$, while the GW radiation at $f<10$Hz is seriously suppressed. For $m_{\rm x}=1$ keV, the SGWB peak amplitude is the same as that of $m_{\rm x}=1$ keV, but a little lower at low frequencies. Therefore, it is hard to constrain the WDM particle mass by the SGWB from Pop I/II BHs. To assess the detectability of GW signal, we also calculate the signal to noise ratio (SNR), which are $\rm SNR=37.7~ (66.5)$ and $27~(47.7)$ for $m_{\rm x}=3$ keV and $m_{\rm x}=1$ keV for Einstein Telescope (ET) with Salpeter (Chabrier) IMF, respectively.
description: 11 pages, 5 figures, accepted for publication in ApJ
The role of maritime continent's rainforests in moderating the evapotranspiration's interannual variation
Creators: name: Lee, Ting Hui
name: Lo, Min Hui
name: Chiang, Chun Lien
name: Kuo, Yan Ning
Publisher: name: Zenodo
Year: 2023

description: Codes for the paper "The role of maritime continent’s rainforests in moderating the evapotranspiration’s interannual variation"
Drop impact on viscous liquid films
Creators: name: Sanjay, Vatsal
name: Lakshman, Srinath
name: Chantelot, Pierre
name: Snoeijer, Jacco H.
name: Lohse, Detlef
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When a liquid drop falls on a solid substrate, the air layer in between them delays the occurrence of liquid--solid contact. For impacts on smooth substrates, the air film can even prevent wetting, allowing the drop to bounce off with dynamics identical to that observed for impacts on superamphiphobic materials. In this article, we investigate similar bouncing phenomena, occurring on viscous liquid films, that mimic atomically smooth substrates, with the goal to probe their effective repellency. We elucidate the mechanisms associated to the bouncing to non-bouncing (floating) transition using experiments, simulations, and a minimal model that predicts the main characteristics of drop impact, the contact time, and the coefficient of restitution. In the case of highly viscous or very thin films, the impact dynamics is not affected by the presence of the viscous film. Within this substrate--independent limit, bouncing is suppressed once the drop viscosity exceeds a critical value as on superamphiphobic substrates. For thicker or less viscous films, both the drop and film properties influence the rebound dynamics and conspire to inhibit bouncing above a critical film thickness. This substrate--dependent regime also admits a limit, for low viscosity drops, in which the film properties alone determine the limits of repellency.
description: Please find the supplemental videos here: https://youtube.com/playlist?list=PLf5C5HCrvhLHJXLqwpylEwYc2rVtTsCUX
D3.2. Source code of algorithms for optimal synchronisation of shared-mobility and mass transit
Creators: name: Consonni, Cristian
name: Piras, Lucas
name: Kumar, Rohit
name: Straka, Milan
name: Buzna, Lobos
name: Cornet, Yannick
name: Rossi, Matteo Giovanni
name: Sabet, Alireza Javadian
name: Niavis, Harris
Publisher: name: Zenodo
Year: 2023

description: This deliverable presents the architecture of the Offer Enticher and Ranker (OER) developed in the scope of the RIDE2RAIL project.
Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn
Creators: name: Matsuda, Takuya
name: Higo, Tomoya
name: Koretsune, Takashi
name: Kanda, Natsuki
name: Hirai, Yoshua
name: Peng, Hanyi
name: Matsuo, Takumi
name: Yoshikawa, Naotaka
name: Shimano, Ryo
name: Nakatsuji, Satoru
name: Matsunaga, Ryusuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate ultrafast dynamics of the anomalous Hall effect (AHE) in the topological antiferromagnet Mn3Sn with sub-100 fs time resolution. Optical pulse excitations largely elevate the electron temperature up to 700 K, and terahertz probe pulses clearly resolves ultrafast suppression of the AHE before demagnetization. The result is well reproduced by microscopic calculation of the intrinsic Berry-curvature mechanism while the extrinsic contribution is clearly excluded. Our work opens a new avenue for the study of nonequilibrium AHE to identify the microscopic origin by drastic control of the electron temperature by light.
Effects of Mutual Coupling on Degree of Freedom and Antenna Efficiency in Holographic MIMO Communications
Creators: name: Yuan, Shuai S. A.
name: Chen, Xiaoming
name: Huang, Chongwen
name: Sha, Wei E. I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Applied Physics (physics.app-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The holographic multiple-input-multiple-output (MIMO) communications refer to the MIMO systems built with ultra-dense antenna arrays, whose channel models and potential applications have attracted increasing attentions recently. When the spacing between adjacent array elements is larger than half wavelength, the effect of mutual coupling can generally be neglected in current antenna designs. However, in holographic MIMO communications, the influence of strong mutual coupling on antenna characteristics is inevitable, resulting in distorted radiation patterns and low radiation efficiencies. In this paper, starting from the analytical correlation and efficiency models, we investigate how the mutual coupling affects the capacity of a space-constrained MIMO system from the aspects of degree of freedom (DOF) and antenna efficiency. The involved fundamental concepts of correlation, DOF, efficiency and mutual coupling are crucial for both antenna and wireless-communication engineers when designing emerging MIMO communication systems.
OSEFT or how to go beyond hard thermal loops
Creators: name: Manuel, Cristina
name: Soto, Joan
name: Stetina, Stephan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that effective field theory techniques can be applied in the high temperature $T$ regime of plasmas to improve the accuracy of the physics of the hard scales (or scales of order $T$), and as a by-product, also that of the soft scales (or scales of order $gT$). At leading order in the coupling constant the hard scales of the plasma can be viewed as on-shell classical particles. Based on this observation, and without any reference to the state of the system, we derive an effective field theory describing the quantum fluctuations around an on-shell fermion with energy $p$, described as a set of high dimension operators over the on-shell energy $p$. When applied to systems close to thermal equilibrium, where for most on-shell particles $p \sim T$, we show that the on-shell effective field theory (OSEFT) properly describes the HTL photon polarization tensor of QED, and its 1/T corrections. For the soft scales the first non-vanishing power correction turns out to be a perturbative correction to the HTL result.
description: 7 pages; contribution to the Proceedings of the XIIth Quark Confinement and the Hadron Spectrum, Thessaloniki, Greece
An unsupervised learning algorithm for computer vision-based blind modal parameters identification of output-only structures from video measurements
Creators: name: Allada, Vishal
name: Saravanan, T. Jothi
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Operational modal analysis (OMA) is required to maintain large-scale and necessary civil infrastructures. The non-contact method of OMA using digital image correlation and point tracking algorithms requires a speckle pattern placed on the structure. Alternatively, advanced computer vision methods like optical flow and phase-based video motion magnification (PBVMM) techniques are used to measure modal parameters. Despite the importance of PBVMM, the users should know the range of frequencies in which the natural structure frequency lies. A methodology based on an unsupervised machine learning technique is developed to extract the modal parameters blindly from its recorded digital video. The proposed methodology uses complex steerable pyramids and an unsupervised machine learning technique, also known as principal component analysis, and analytical mode decomposition with a random decrement technique to blindly extract the modal parameters of a structure. This study validated the proposed methodology using a multi-degree of freedom (DOF) numerical model. The results are compared with theoretical and estimated values and are in good agreement. Furthermore, it is implemented on a laboratory benchmark SDOF, MDOF, and real-time videos of the London Millennium and Tacoma Narrows bridges for blindly extracting the modal frequencies and damping ratios.
Ultrafast Band Structure Control of a Two-Dimensional Heterostructure
Creators: name: Ulstrup, Søren
name: Čabo, Antonija Grubišić
name: Miwa, Jill A.
name: Riley, Jonathon M.
name: Grønborg, Signe S.
name: Johannsen, Jens C.
name: Cacho, Cephise
name: Alexander, Oliver
name: Chapman, Richard T.
name: Springate, Emma
name: Bianchi, Marco
name: Dendzik, Maciej
name: Lauritsen, Jeppe V.
name: King, Phil D. C.
name: Hofmann, Philip
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic structure of two-dimensional (2D) semiconductors can be significantly altered by screening effects, either from free charge carriers in the material itself, or by environmental screening from the surrounding medium. The physical properties of 2D semiconductors placed in a heterostructure with other 2D materials are therefore governed by a complex interplay of both intra- and inter-layer interactions. Here, using time- and angle-resolved photoemission, we are able to isolate both the layer-resolved band structure and, more importantly, the transient band structure evolution of a model 2D heterostructure formed of a single layer of MoS$_2$ on graphene. Our results reveal a pronounced renormalization of the quasiparticle gap of the MoS$_2$ layer. Following optical excitation, the band gap is reduced by up to $\sim\!$400 meV on femtosecond timescales due to a persistence of strong electronic interactions despite the environmental screening by the $n$-doped graphene. This points to a large degree of tuneability of both the electronic structure and electron dynamics for 2D semiconductors embedded in a van der Waals-bonded heterostructure.
description: 22 pages, 5 figures, Published in ACS Nano 2016
Classical and quantum cosmology in $f(T)$-gravity theory: A Noether symmetry approach
Creators: name: Bhaumik, Roshni
name: Dutta, Sourav
name: Chakraborty, Subenoy
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the framework of $f(T)$-gravity theory, classical and quantum cosmology has been studied in the present work for FLRW space-time model. The Noether symmetry, a point-like symmetry of the Lagrangian is used to the physical system and a specific functional form of $f(T)$ is determined. A point transformation in the 2D augmented space restricts one of the variable to be cyclic so that the Lagrangian as well as the field equations are simplified so that they are solvable. Lastly for quantum cosmology, the WD equation is constructed and possible solution has been evaluated.
description: 15 pages, 2 figures
Signatures of regular black holes from the quasar continuum spectrum
Creators: name: Banerjee, Indrani
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Regular black holes arising in Einstein gravity coupled to non-linear electrodynamics are worth studying as they can circumvent the r = 0 curvature singularity arising in general relativity. In this work we explore the signatures of regular black holes with a Minkowski core from the quasar continuum spectrum. We use thin-disk approximation to derive the theoretical luminosity from the accretion disk and compare it with the optical data of eighty Palomar Green quasars. Our analysis based on error estimators like the chi-square, the Nash-Sutcliffe efficiency, the index of agreement etc. reveal that optical observations of quasars favor the Kerr scenario compared to black holes in non-linear electrodynamics. The implications are discussed.
description: 22 pages, 6 figures
Equilibrium Sequences and Gravitational Instability of Rotating Isothermal Rings
Creators: name: Kim, Woong-Tae
name: Moon, Sanghyuk
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Nuclear rings at centers of barred galaxies exhibit strong star formation activities. They are thought to undergo gravitational instability when sufficiently massive. We approximate them as rigidly-rotating isothermal objects and investigate their gravitational instability. Using a self-consistent field method, we first construct their equilibrium sequences specified by two parameters: alpha corresponding to the thermal energy relative to gravitational potential energy, and R_B measuring the ellipticity or ring thickness. Unlike in the incompressible case, not all values of R_B yield an isothermal equilibrium, and the range of R_B for such equilibria shrinks with decreasing alpha. The density distributions in the meridional plane are steeper for smaller alpha, and well approximated by those of infinite cylinders for slender rings. We also calculate the dispersion relations of nonaxisymmetric modes in rigidly-rotating slender rings with angular frequency Omega_0 and central density rho_max. Rings with smaller alpha are found more unstable with a larger unstable range of the azimuthal mode number. The instability is completely suppressed by rotation when Omega_0 exceeds the critical value. The critical angular frequency is found to be almost constant at ~ 0.7 sqrt(G*rho_c) for alpha > 0.01 and increases rapidly for smaller alpha. We apply our results to a sample of observed star-forming rings and confirm that rings without a noticeable azimuthal age gradient of young star clusters are indeed gravitationally unstable.
description: 17 figures and 2 tables; Accepted for publication in the ApJ
[ARTICLE] Novel Multi-Path Kitchen Sink Strainer (Open Design Magazine / 2023)
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2023
Subjects: Mechanical engineering not elsewhere classified
Other engineering not elsewhere classified
Engineering design
Engineering education
Engineering practice
Systems engineering
Engineering practice and education not elsewhere classified

description: Tired of food debris blocking your kitchen sink? We all are, making this an excellent opportunity to look at novel ways to manage the dirty water outflow (often carrying clutering debris). This multi-path strainer accommodates design features that store food debris in special 360 degree cavities, while preveting complete blockage. The horizontal water path is the primary way to carry water to the outlet, whilst preventing debris from blocking completely the water flow. If this horizontal path gets blocked (by soo much debris that covers the entire 360 degrees of cavities), water will accummulate and overflow via the vertical path, providing an alternative means of discharge, and thus preventing overall blockage of the sink. This article explains the design process of a novel manner of managing the water flow from a sink in order to prevent, or at least minimize, its blockage (due to singularity convergence of debris, which often happens when we are washing dishes). The CAD model is available for download from Figshare here. This research was originally published as an article on the Open Design Magazine hosted by the MIT PubPub open source publication platform.
title: EDITORIAL
Creators: name: João, Ana Silva
name: Goes, Margarida Palma
Publisher: name: Universidade de Évora
Year: 2023

description: A enfermagem é uma profissão de grande importância e responsabilidade na área da saúde, com profissionais dedicados a cuidar de pessoas em diferentes contextos. No entanto, a prática da enfermagem deve estar sempre baseada em evidências científicas para garantir a eficácia e a segurança dos cuidados prestados.
description: Revista Ibero-Americana de Saúde e Envelhecimento, Vol 9, No 1 (2023): RIASE
Predicting User Roles in Social Networks using Transfer Learning with Feature Transformation
Creators: name: Sun, Jun
name: Kunegis, Jérôme
name: Staab, Steffen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: How can we recognise social roles of people, given a completely unlabelled social network? We present a transfer learning approach to network role classification based on feature transformations from each network's local feature distribution to a global feature space. Experiments are carried out on real-world datasets. (See manuscript for the full abstract.)
description: 8 pages, 5 figures, IEEE ICDMW 2016
Separable and Equatable Hypergraphs
Creators: name: Deza, Daniel
name: Onn, Shmuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A, 15A, 51M, 52A, 52B, 52C, 62H, 68Q, 68R, 68U, 68W, 90B, 90C

description: We consider the class of {\em separable} $k$-hypergraphs, which can be viewed as uniform analogs of threshold Boolean functions, and the class of {\em equatable} $k$-hypergraphs. We show that every $k$-hypergraph is either separable or equatable but not both. We raise several questions asking which classes of equatable (and separable) hypergraphs enjoy certain appealing characterizing properties, which can be viewed as uniform analogs of the $2$-summable and $2$-monotone Boolean function properties. In particular, we introduce the property of {\em exchangeability}, and show that all these questioned characterizations hold for graphs, multipartite $k$-hypergraphs for all $k$, paving $k$-matroids and binary $k$-matroids for all $k$, and $3$-matroids, which are all equatable if and only if they are exchangeable. We also discuss the complexity of deciding if a hypergraph is separable, and in particular, show that it requires exponential time for paving matroids presented by independence oracles, and can be done in polynomial time for binary matroids presented by such oracles.
Competition in the bread industry in Victoria
Creators: name: Cousins, David Charles.
Publisher: name: Monash University
Year: 2022

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.
Quantum Anomaly Detection for Collider Physics
Creators: name: Alvi, Sulaiman
name: Bauer, Christian
name: Nachman, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Machine Learning (QML) is an exciting tool that has received significant recent attention due in part to advances in quantum computing hardware. While there is currently no formal guarantee that QML is superior to classical ML for relevant problems, there have been many claims of an empirical advantage with high energy physics datasets. These studies typically do not claim an exponential speedup in training, but instead usually focus on an improved performance with limited training data. We explore an analysis that is characterized by a low statistics dataset. In particular, we study an anomaly detection task in the four-lepton final state at the Large Hadron Collider that is limited by a small dataset. We explore the application of QML in a semi-supervised mode to look for new physics without specifying a particular signal model hypothesis. We find no evidence that QML provides any advantage over classical ML. It could be that a case where QML is superior to classical ML for collider physics will be established in the future, but for now, classical ML is a powerful tool that will continue to expand the science of the LHC and beyond.
description: 18 pages, 6 figures v2: updated acknowledgment, fixed typos related to the output of VQC and QCL
Discovery of Very High Energy Gamma Rays from 1ES 1440+122
Creators: name: VERITAS Collaboration
name: Archambault, S.
name: Archer, A.
name: Barnacka, A.
name: Behera, B.
name: Beilicke, M.
name: Benbow, W.
name: Berger, K.
name: Bird, R.
name: Boettcher, M.
name: Buckley, J. H.
name: Bugaev, V.
name: Cardenzana, J. V
name: Cerruti, M.
name: Chen, X.
name: Christiansen, J. L.
name: Ciupik, L.
name: Collins-Hughes, E.
name: Connolly, M. P.
name: Cui, W.
name: Dickinson, H. J.
name: Dumm, J.
name: Eisch, J. D.
name: Errando, M.
name: Falcone, A.
name: Federici, S.
name: Feng, Q.
name: Finley, J. P.
name: Fleischhack, H.
name: Fortson, L.
name: Furniss, A.
name: Gillanders, G. H.
name: Godambe, S.
name: Griffin, S.
name: Griffiths, S. T.
name: Grube, J.
name: Gyuk, G.
name: Haakansson, N.
name: Hanna, D.
name: Holder, J.
name: Hughes, G.
name: Johnson, C. A.
name: Kaaret, P.
name: Kar, P.
name: Kertzman, M.
name: Khassen, Y.
name: Kieda, D.
name: Krawczynski, H.
name: Kumar, S.
name: Lang, M. J.
name: Madhavan, A. S
name: Maier, G.
name: McArthur, S.
name: McCann, A.
name: Meagher, K.
name: Millis, J.
name: Moriarty, P.
name: Nelson, T.
name: Nieto, D.
name: de Bhroithe, A. O'Faolain
name: Ong, R. A.
name: Otte, A. N.
name: Park, N.
name: Perkins, J. S.
name: Pohl, M.
name: Popkow, A.
name: Prokoph, H.
name: Pueschel, E.
name: Quinn, J.
name: Ragan, K.
name: Rajotte, J.
name: Reyes, L. C.
name: Reynolds, P. T.
name: Richards, G. T.
name: Roache, E.
name: Sembroski, G. H.
name: Shahinyan, K.
name: Smith, A. W.
name: Staszak, D.
name: Sweeney, K
name: Telezhinsky, I.
name: Tucci, J. V.
name: Tyler, J.
name: Varlotta, A.
name: Vassiliev, V. V.
name: Wakely, S. P.
name: Welsing, R.
name: Wilhelm, A.
name: Williams, D. A.
name: Zitzer, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 hours, resulted in the discovery of $γ$-ray emission from the blazar, which has a redshift $z$=0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8$\pm0.7_{\mathrm{stat}}\pm0.8_{\mathrm{sys}}$) $\times$ 10$^{-12}$ cm$^{-2}$ s$^{-1}$ (1.2\% of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 TeV to 1.3 TeV with a photon index of 3.1 $\pm$ 0.4$_{\mathrm{stat}}$ $\pm$ 0.2$_{\mathrm{sys}}$. Quasi-simultaneous multi-wavelength data from the Fermi Large Area Telescope (0.3--300 GeV) and the Swift X-ray Telescope (0.2--10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multi-wavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.
description: 8 pages, 4 figures. Accepted for publication in MNRAS
Best Scholarship Websites
Creators: name: I.Al-Mosawi, Ali
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: In this report, those wishing to study abroad will find many reliable websites to search for scholarships provided by international universities and in various disciplines.
http://dx.doi.org/10.13140/RG.2.2.36090.47043
HORSES3D: a high-order discontinuous Galerkin solver for flow simulations and multi-physics applications
Creators: name: Ferrer, E.
name: Rubio, G.
name: Ntoukas, G.
name: Laskowski, W.
name: Mariño, O. A.
name: Colombo, S.
name: Mateo-Gabín, A.
name: de Lara, F. Manrique
name: Huergo, D.
name: Manzanero, J.
name: Rueda-Ramírez, A. M.
name: Kopriva, D. A.
name: Valero, E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We present the latest developments of our High-Order Spectral Element Solver (HORSES3D), an open source high-order discontinuous Galerkin framework, capable of solving a variety of flow applications, including compressible flows (with or without shocks), incompressible flows, various RANS and LES turbulence models, particle dynamics, multiphase flows, and aeroacoustics. We provide an overview of the high-order spatial discretisation (including energy/entropy stable schemes) and anisotropic p-adaptation capabilities. The solver is parallelised using MPI and OpenMP showing good scalability for up to 1000 processors. Temporal discretisations include explicit, implicit, multigrid, and dual time-stepping schemes with efficient preconditioners. Additionally, we facilitate meshing and simulating complex geometries through a mesh-free immersed boundary technique. We detail the available documentation and the test cases included in the GitHub repository.
Observation of electronic bound states in charge-ordered YBa$_2$Cu$_3$O$_y$
Creators: name: Zhou, R.
name: Hirata, M.
name: Wu, T.
name: Vinograd, I.
name: Mayaffre, H.
name: Krämer, S.
name: Horvatić, M.
name: Berthier, C.
name: Reyes, A. P.
name: Kuhns, P. L.
name: Liang, R.
name: Hardy, W. N.
name: Bonn, D. A.
name: Julien, M. -H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Observing how electronic states in solids react to a local symmetry breaking provides insight into their microscopic nature. A striking example is the formation of bound states when quasiparticles are scattered off defects. This is known to occur, under specific circumstances, in some metals and superconductors but not, in general, in the charge-density-wave (CDW) state. Here, we report the unforeseen observation of bound states when a magnetic field quenches superconductivity and induces long-range CDW order in YBa$_2$Cu$_3$O$_y$. Bound states indeed produce an inhomogeneous pattern of the local density of states $N(E_F)$ that leads to a skewed distribution of Knight shifts which is detected here through an asymmetric profile of $^{17}$O NMR lines. We argue that the effect arises most likely from scattering off defects in the CDW state, which provides a novel case of disorder-induced bound states in a condensed-matter system and an insightful window into charge ordering in the cuprates.
Coupled Leidenfrost States as a Monodisperse Granular Clock
Creators: name: Liu, Rui
name: Yang, Mingcheng
name: Chen, Ke
name: Hou, Meiying
name: To, Kiwing
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using an event-driven molecular dynamics simulation, we show that simple monodisperse granular beads confined in coupled columns may oscillate as a new type of granular clock. To trigger this oscillation, the system needs to be driven against gravity into a density-inverted state, with a high-density clustering phase supported from below by a gas-like low-density phase (Leidenfrost effect) in each column. Our analysis reveals that the density-inverted structure and the relaxation dynamics between the phases can amplify any small asymmetry between the columns, and lead to a giant oscillation. The oscillation occurs only for an intermediate range of the coupling strength, and the corresponding phase diagram can be universally described with a characteristic height of the density-inverted structure. A minimal two-phase model is proposed and linear stability analysis shows that the triggering mechanism of the oscillation can be explained as a switchable two-parameter Hopf bifurcation. Numerical solutions of the model also reproduce similar oscillatory dynamics to the simulation results.
description: 5 figures
Spectral and scattering theory for Schrödinger operators on perturbed topological crystals
Creators: name: Parra, Daniel
name: Richard, Serge
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47A10, 05C63, 35R02

description: In this paper we investigate the spectral and the scattering theory of Schrödinger operators acting on perturbed periodic discrete graphs. The perturbations considered are of two types: either a multiplication operator by a short-range or a long-range function, or a short-range type modification of the measure defined on the vertices and on the edges of the graph. Mourre theory is used for describing the nature of the spectrum of the underlying operators. For short-range perturbations, existence and completeness of local wave operators are also proved.
description: 36 pages
Inkjet Printed Wire-Grid Polarizers for the THz Frequency Range
Creators: name: Farid, A.
name: Laurita, N. J.
name: Tehrani, B.
name: Hester, J. G.
name: Tentzeris, M. M.
name: Armitage, N. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have investigated the use of inkjet printing technology for the production of THz range wire-grid polarizers using time-domain terahertz spectroscopy (TDTS). Such technology affords an inexpensive and reproducible way of quickly manufacturing THz range metamaterial structures. As a proof-of-concept demonstration, numerous thin silver-nanoparticle ink lines were printed using a Dimatix DMP-2831 printer. We investigated the optimal printing geometry of the polarizers by examining a number of samples with printed wires of varying thickness and spacing. We also investigated the polarization properties of multiply-stacked polarizers.
description: To appear International Journal of Infrared and Millimeter Waves
Momentum Fractions carried by quarks and gluons in models of proton structure functions at small $x$
Creators: name: Choudhury, D K
name: Saikia, Baishali
name: Kalita, K
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The paper reports analysis of momentum fractions carried by quarks and gluons in models of Proton structure functions at small $x$. First, we analyze the model proposed by Lastovicka based on self-similarity sometime back. We then make a similar analysis for a second model based on the same notion which is also free from singularity in $x$ : $0
description: 23 pages, 9 figures and 5 tables