cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gender and active travel: a qualitative data synthesis informed by machine learning.
Creators: name: Haynes, Emily
name: Green, Judith
name: Garside, Ruth
name: Kelly, Michael P
name: Guell, Cornelia
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: Gender
Machine Learning
Qualitative Synthesis
Active Travel
Text Analytics

description: BACKGROUND:Innovative approaches are required to move beyond individual approaches to behaviour change and develop more appropriate insights for the complex challenge of increasing population levels of activity. Recent research has drawn on social practice theory to describe the recursive and relational character of active living but to date most evidence is limited to small-scale qualitative research studies. To 'upscale' insights from individual contexts, we pooled data from five qualitative studies and used machine learning software to explore gendered patterns in the context of active travel. METHODS:We drew on 280 transcripts from five research projects conducted in the UK, including studies of a range of populations, travel modes and settings, to conduct unsupervised 'topic modelling analysis'. Text analytics software, Leximancer, was used in the first phase of the analysis to produce inter-topic distance maps to illustrate inter-related 'concepts'. The outputs from this first phase guided a second researcher-led interpretive analysis of text excerpts to infer meaning from the computer-generated outputs. RESULTS:Guided by social practice theory, we identified 'interrelated' and 'relating' practices across the pooled datasets. For this study we particularly focused on respondents' commutes, travelling to and from work, and on differentiated experiences by gender. Women largely described their commute as multifunctional journeys that included the school run or shopping, whereas men described relatively linear journeys from A to B but highlighted 'relating' practices resulting from or due to their choice of commute mode or journey such as showering or relaxing. Secondly, we identify a difference in discourses about practices across the included datasets. Women spoke more about 'subjective', internal feelings of safety ('I feel unsafe'), whereas men spoke more about external conditions ('it is a dangerous road'). CONCLUSION:This rare application of machine learning to qualitative social science research has helped to identify potentially important differences in co-occurrence of practices and discourses about practice between men's and women's accounts of travel across diverse contexts. These findings can inform future research and policy decisions for promoting travel-related social practices associated with increased physical activity that are appropriate across genders.
Serieys_Fig_S2_ESM.pdf from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Regression plots for select parameters significantly associated with land use.
Performance Improvement of LIBRSB-1.3 Sparse BLAS on EuroHPC-class Systems
Creators: name: Martone, Michele
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Librsb, Rsb, Sparse Matrices, Csr, Coo, SpMM, SpMV, Octave, Sparsersb, Pyrsb, Sparse BLAS, PRACE, LyNcs, DDalphaAMG, Fabulous, LQCD, Python, GNU Octave, C, C++, Fortran, Spack, EasyBuild, Debian, Ubuntu, Guix-HPC
subject: http://librsb.sourceforge.net/
subject: https://github.com/michelemartone/pyrsb/
subject: https://octave.sourceforge.io/sparsersb/

description: Poster about recent advances related to the "LIBRSB" library in the context of the "LyNcs" collaboration. This work has been financed by PRACE-6IP, under Grant agreement ID: 823767. Presented at the "EuroHPC Summit Week (EHPCSW) 2022 " (https://events.prace-ri.eu/event/1214/) that took place between 22.03.2022 and 24.03.2022 in Paris. Conference organized by the Partnership for Advanced Computing in Europe (PRACE), the European Technology Platform for High-Performance Computing (ETP4HPC), the EuroHPC Joint Undertaking (EuroHPC JU) and the European Commission (EC).
Demonstration of a magnetic Prandtl number disc instability from first principles
Creators: name: Potter, William J.
name: Balbus, Steven A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Understanding what determines the strength of MHD turbulence in accretion discs is a question of fundamental theoretical and observational importance. In this work we investigate whether the dependence of the turbulent accretion disc stress ($α$) on the magnetic Prandtl number (Pm) is sufficiently sensitive to induce thermal-viscous instability using 3D MHD simulations. We first investigate whether the $α$-Pm dependence, found by many previous authors, has a physical or numerical origin by conducting a suite of local shearing-box simulations. We find that a definite $α$-Pm dependence persists when simultaneously increasing numerical resolution and decreasing the absolute values of both the viscous and resistive dissipation coefficients. This points to a physical origin of the $α$-Pm dependence. Using a further set of simulations which include realistic turbulent heating and radiative cooling, and by giving Pm a realistic physical dependence on the plasma temperature and density, we demonstrate that the $α$-Pm dependence is sufficiently strong to lead to a local instability. We confirm that the instability manifests itself as an unstable limit cycle by mapping the local thermal-equilibrium curve of the disc. This is the first self-consistent MHD simulation demonstrating the Pm instability from first principles. This result is important because a physical Pm instability would lead to the global propagation of heating and cooling fronts and a transition between disc states on timescales compatible with the observed hard/soft state transitions in black hole binaries.
description: 7 pages, 6 figures, submitted to MNRAS
Répertoire bibliographique relatif aux ouvrages consultés par F. Lancelot
Creators: name: Lancelot, Francine
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/FileId-3413
description: created: ca 1970
Identifying external influences and understanding factors creating pressure on hospital systems
Creators: name: Dominkovic-Cook, Jadranka
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Background: In today's fast changing environment, one of the major challenges for hospitals is to adapt to external demands while ensuring quality, safety and positive patient outcomes. It is not yet clear how the external environment affects the delivery of care. Health care research is currently following a normative approach when studying how environments affect hospital outcomes. External influences are theoretically conceptualised, which leads to inconclusive and non-comparable results. Research has yet to be conducted into how hospital staff experience external influences or external pressure. Thus, this qualitative study aims to assess how external influences are perceived by health care professionals in hospitals. Method: Open-ended, in-depth, semi-structured interviews were used to obtain a first impression of the topic. A total number of 8 interviews with health care professionals were conducted between April and June 2016 at a local public district acute hospital. Representation was sought across a variety of roles, fields and departments levels. A general inductive approach was used to identify the main themes and develop categories from the qualitative data. Results: Each hospital professional created their own subjective meaning of external influences. The perception of pressure was relative and shaped by identity and personality. There was no consistent understanding of 'internal' or 'external'. The interpreted boundaries were subjective and dynamic, depending on perception, professional accountability and work responsibility. The overall context and circumstances, the work-load, and time constraints also were connected to the perception of influences. Conclusion: Hospital staff experienced the external environment according to their own identity. External pressure and organisational boundaries, as understood by organisational theorists, had very limited relevance for most people working in the hospital.
Random matrices and the New York City subway system
Creators: name: Jagannath, Aukosh
name: Trogdon, Thomas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 60B20, 62P35

description: We analyze subway arrival times in the New York City subway system. We find regimes where the gaps between trains exhibit both (unitarily invariant) random matrix statistics and Poisson statistics. The departure from random matrix statistics is captured by the value of the Coulomb potential along the subway route. This departure becomes more pronounced as trains make more stops.
Serieys_Supp_Fig_Captions_ESM.docx from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Understanding how human activities influence immune response to environmental stressors can support biodiversity conservation across increasingly urbanizing landscapes. We studied a bobcat (Lynx rufus) population in urban southern California that experienced a rapid population decline from 2002–2005 due to notoedric mange. Because anticoagulant rodenticide (AR) exposure was an underlying complication in mange deaths, we aimed to understand sublethal contributions of urbanization and ARs on 65 biochemical markers of immune and organ function. Variance in immunological variables was primarily associated with AR exposure and secondarily with urbanization. Use of urban habitat and AR exposure has pervasive, complex and predictable effects on biochemical markers of immune and organ function in free-ranging bobcats that include impacts on neutrophil, lymphocyte and cytokine populations, total bilirubin and phosphorus. We find evidence of both inflammatory response and immune suppression associated with urban land use and rat poison exposure that could influence susceptibility to opportunistic infections. Consequently, AR exposure may influence mortality and has population-level effects, as previous work in the focal population has revealed substantial mortality caused by mange infection. The secondary effects of anticoagulant exposure may be a worldwide, largely unrecognized problem affecting a variety of vertebrate species in human-dominated environments.
Reflecting at the Speed of Light
Creators: name: Good, Michael R. R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A perfectly reflecting accelerating boundary produces thermal emission to an observer at $\mathscr{I}_L^+$ and a finite amount of energy to an observer at $\mathscr{I}_R^+$ by asymptotically traveling to the speed of light without an acceleration horizon.
description: 4 pages, 4 figures; In memory of Kerson Huang
Impedance-source network power converters
Creators: name: Siwakoti, Yam P.
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: The research described in this thesis covers the analysis and design of impedance-source networks for a wide range of electric power conversion applications (dc-dc, dc-ac, ac-dc, ac-ac). Variance impedance networks, circuit topologies and modulation techniques were analysed, designed and tested in the laboratory to improve performance (efficiency, reliability and power density) of the converter. To achieve this, three distinct approaches were taken in this research, which include: i) investigate and implement a new modulation technique, ii) retrofit existing topologies to get an improved hybrid topology, and iii) investigate a novel converter topology with desired performance.
Higher Spin Currents in the Orthogonal Coset Theory
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the coset model $(D_N^{(1)} \oplus D_N^{(1)},D_N^{(1)})$ at levels $(k_1,k_2)$, the higher spin $4$ current that contains the quartic WZW currents contracted with completely symmetric $SO(2N)$ invariant $d$ tensor of rank $4$ is obtained. The three-point functions with two scalars are obtained for any finite $N$ and $k_2$ with $k_1=1$. They are determined also in the large $N$ 't Hooft limit. When one of the levels is the dual Coxeter number of $SO(2N)$, $k_1=2N-2$, the higher spin $\frac{7}{2}$ current, which contains the septic adjoint fermions contracted with the above $d$ tensor and the triple product of structure constants, is obtained from the operator product expansion (OPE) between the spin $\frac{3}{2}$ current living in the ${\cal N}=1$ superconformal algebra and the above higher spin $4$ current. The OPEs between the higher spin $\frac{7}{2}, 4$ currents are described. For $k_1=k_2=2N-2$ where both levels are equal to the dual Coxeter number of $SO(2N)$, the higher spin $3$ current of $U(1)$ charge $\frac{4}{3}$, which contains the six product of spin $\frac{1}{2}$ (two) adjoint fermions contracted with the product of $d$ tensor and two structure constants, is obtained. The corresponding ${\cal N}=2$ higher spin multiplet is determined by calculating the remaining higher spin $\frac{7}{2}, \frac{7}{2}, 4$ currents with the help of two spin $\frac{3}{2}$ currents in the ${\cal N}=2$ superconformal algebra. The other ${\cal N}=2$ higher spin multiplet, whose $U(1)$ charge is opposite to the one of above ${\cal N}=2$ higher spin multiplet, is obtained. The OPE between these two ${\cal N}=2$ higher spin mutiplets is also discussed.
description: 96 pages
Serieys_Tables_S1-S12_ESM.docx from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Supplementary Tables S1-S12
Relationship between leaf traits, insect communities and resource availability
Creators: name: Laxton, Emma
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: This project used the resource availability hypothesis (Coley et al., 1985) as a framework for investigating the relationship between resource availability (as defined by soil nutrients), leaf traits, insect herbivore damage and insect community structure. According to the hypothesis, plants from low resource environments should be better-defended, have longer leaf lifespans and slower growth rates than plants from higher resource environments. Higher resource plant species are expected to suffer higher levels of herbivory and recover faster from herbivory than low resource plant species (Coley et al. 1985). A corollary to this hypothesis is that plants from higher resource sites should support greater densities of insect herbivores than low resource species. Comparisons between high and low resource sites were made in terms of: (i) leaf traits of mature and immature leaves; (ii) phenology of leaf maturation; (iii) herbivore damage in the field and laboratory; (iv) diversity and abundance of herbivorous insect fauna; and (v) ability to recover from herbivory.
Genetically optimized All-dielectric metasurfaces
Creators: name: Egorov, Victor
name: Eitan, Michal
name: Scheuer, Jacob
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present and study theoretically a new design approach for obtaining wide angle, highly efficient, all-dielectric metasurfaces. As a concrete example we focus on optimizing flat beam deflector for both the infra-red and visible spectral regions. Transmission efficiencies of up to 87.2% are obtained theoretically for deflection angle of 65° in visible (580nm) spectrum and up to 82% for deflection angle of 30.5° at telecom wavelength (1550nm). The enhanced efficiencies at wide deflection angles are obtained by genetic optimization of the nano-structures comprising the metasurface. Compared to previously employed design approaches, our approach enhances the transmission efficiency substantially without sacrificing rectangular grid arrangement and facilitates the realization of wide angle flat deflectors and holograms/lenses.
Serieys_Methods_Results_ESM.docx from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Supplementary methods and results referenced in main text.
Recovery time after localized perturbations in complex dynamical networks
Creators: name: Mitra, Chiranjit
name: Kittel, Tim
name: Choudhary, Anshul
name: Kurths, Jürgen
name: Donner, Reik
Publisher: name: Humboldt-Universität zu Berlin
Year: 2017
Subjects: subject: complex systems
subject: nonlinear dynamics
subject: networked dynamical systems
subject: synchronization
subject: transient stability against shocks
subject: dynamical timescales
subject: 530 Physik

description: Maintaining the synchronous motion of dynamical systems interacting on complex networks is often critical to their functionality. However, real-world networked dynamical systems operating synchronously are prone to random perturbations driving the system to arbitrary states within the corresponding basin of attraction, thereby leading to epochs of desynchronized dynamics with a priori unknown durations. Thus, it is highly relevant to have an estimate of the duration of such transient phases before the system returns to synchrony, following a random perturbation to the dynamical state of any particular node of the network. We address this issue here by proposing the framework of single-node recovery time (SNRT) which provides an estimate of the relative time scales underlying the transient dynamics of the nodes of a network during its restoration to synchrony. We utilize this in differentiating the particularly slow nodes of the network from the relatively fast nodes, thus identifying the critical nodes which when perturbed lead to significantly enlarged recovery time of the system before resuming synchronized operation. Further, we reveal explicit relationships between the SNRT values of a network, and its global relaxation time when starting all the nodes from random initial conditions. Earlier work on relaxation time generally focused on investigating its dependence on macroscopic topological properties of the respective network. However, we employ the proposed concept for deducing microscopic relationships between topological features of nodes and their respective SNRT values. The framework of SNRT is further extended to a measure of resilience of the different nodes of a networked dynamical system. We demonstrate the potential of SNRT in networks of Rössler oscillators on paradigmatic topologies and a model of the power grid of the United Kingdom with second-order Kuramoto-type nodal dynamics illustrating the conceivable practical applicability of the proposed concept.
A transient, flat spectrum radio pulsar near the Galactic centre
Creators: name: Dexter, J.
name: Degenaar, N.
name: Kerr, M.
name: Deller, A.
name: Deneva, J.
name: Lazarus, P.
name: Kramer, M.
name: Champion, D.
name: Karuppusamy, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent studies have shown possible connections between highly magnetized neutron stars ("magnetars"), whose X-ray emission is too bright to be powered by rotational energy, and ordinary radio pulsars. In addition to the magnetar SGR J1745-2900, one of the radio pulsars in the Galactic centre (GC) region, PSR J1746-2850, had timing properties implying a large magnetic field strength and young age, as well as a flat spectrum. All characteristics are similar to those of rare, transient, radio-loud magnetars. Using several deep non-detections from the literature and two new detections, we show that this pulsar is also transient in the radio. Both the flat spectrum and large amplitude variability are inconsistent with the light curves and spectral indices of 3 radio pulsars with high magnetic field strengths. We further use frequent, deep archival imaging observations of the GC in the past 15 years to rule out a possible X-ray outburst with a luminosity exceeding the rotational spin down rate. This source, either a transient magnetar without any detected X-ray counterpart or a young, strongly magnetized radio pulsar producing magnetar-like radio emission, further blurs the line between the two categories. We discuss the implications of this object for the radio emission mechanism in magnetars and for star and compact object formation in the GC.
description: 7 pages, 4 figures, MNRAS in press
Attosecond control of spin polarization in electron–ion recollision driven by intense tailored fields
Creators: name: Ayuso, David
name: Jimenez Galan, Alvaro
name: Morales, Felipe
name: Ivanov, Misha
name: Smirnova, Olga
Publisher: name: Humboldt-Universität zu Berlin
Year: 2017
Subjects: subject: spin polarization
subject: attosecond physics
subject: strong laser fields
subject: electron–ion recollision
subject: 530 Physik

description: Tunnel ionization of noble gas atoms driven by a strong circularly polarized laser field in combination with a counter-rotating second harmonic generates spin-polarized electrons correlated to the spin-polarized ionic core. Crucially, such two-color field can bring the spin-polarized electrons back to the parent ion, enabling the scattering of the spin-polarized electron on the spin-polarized parent ion. Here we show how one can control the degree of spin polarization as a function of electron energy and recollision time by tuning the laser parameters, such as the relative intensities of the counter-rotating fields. The attosecond precision of the control over the degree of spin polarization opens the door for attosecond control and spectroscopy of spin-resolved dynamics.
High harmonic interferometry of the Lorentz force in strong mid-infrared laser fields
Creators: name: Pisanty, Emilio
name: Hickstein, Daniel
name: Galloway, Benjamin R
name: Durfee, Charles
name: Kapteyn, Henry
name: Murnane, Margaret M.
name: Ivanov, Misha
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: high harmonic generation
subject: strong-field physics
subject: dipole approximation
subject: strong-field approximation
subject: bicircular fields
subject: 530 Physik

description: The interaction of intense mid-infrared laser fields with atoms and molecules leads to a range of new opportunities, from the production of bright, coherent radiation in the soft x-ray range, to imaging molecular structures and dynamics with attosecond temporal and sub-angstrom spatial resolution. However, all these effects, which rely on laser-driven recollision of an electron removed by the strong laser field and its parent ion, suffer from the rapidly increasing role of the magnetic field component of the driving pulse: the associated Lorentz force pushes the electrons off course in their excursion and suppresses all recollision-based processes, including high harmonic generation as well as elastic and inelastic scattering. Here we show how the use of two non-collinear beams with opposite circular polarizations produces a forwards ellipticity which can be used to monitor, control, and cancel the effect of the Lorentz force. This arrangement can thus be used to re-enable recollision-based phenomena in regimes beyond the long-wavelength breakdown of the dipole approximation, and it can be used to observe this breakdown in high harmonic generation using currently available light sources.
Community detection by label propagation with compression of flow
Creators: name: Han, Jihui
name: Li, Wei
name: Su, Zhu
name: Zhao, Longfeng
name: Deng, Weibing
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The label propagation algorithm (LPA) has been proved to be a fast and effective method for detecting communities in large complex networks. However, its performance is subject to the non-stable and trivial solutions of the problem. In this paper, we propose a modified label propagation algorithm LPAf to efficiently detect community structures in networks. Instead of the majority voting rule of the basic LPA, LPAf updates the label of a node by considering the compression of a description of random walks on a network. A multi-step greedy agglomerative strategy is employed to enable LPAf to escape the local optimum. Furthermore, an incomplete update condition is also adopted to speed up the convergence. Experimental results on both synthetic and real-world networks confirm the effectiveness of our algorithm.
Optimizing Beer Glass Shapes to Minimize Heat Transfer During Consumption
Creators: name: Pellegrini, Claudio de Castro
Publisher: name: arXiv
Year: 2024
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: This paper addresses the problem of determining the optimum shape for a beer glass that minimizes the heat transfer while the liquid is consumed, thereby keeping it cold for as long as possible. The proposed solution avoids the use of insulating materials. The glass is modelled as a body of revolution generated by a smooth curve S, constructed from a material with negligible thermal resistance at the revolution surface but insulated at the bottom. The ordinary differential equation describing the problem is derived from the first law of Thermodynamics applied to a control volume encompassing the liquid. This is an inverse optimization problem, aiming to find the shape of the glass (represented by curve S) that minimizes the heat transfer rate. In contrast, the direct problem aims to determine the heat transfer rate for a given geometry. The solution obtained is analytic, and the resulting expression for S is in closed form, providing a family of optimal glass shapes that can be manufactured using conventional methods.
description: 10 pages, 7 figures
Estimating the Critical Parameters of the Hard Square Lattice Gas Model
Creators: name: Mandal, Dipanjan
name: Nath, Trisha
name: Rajesh, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The hard square lattice gas model on a square lattice is known to undergo a continuous phase transition from a low density fluid-like phase to high density phase with columnar or smectic order. We estimate the critical activity $z_c$ by calculating, within an approximation scheme, the interfacial tension between two differently ordered columnar phases, and then setting it to zero. The approximation scheme allows for the ordered phases to have multiple defects and the interface between the ordered phases to have overhangs. We estimate $z_c=105.35$, which is in good agreement with existing Monte Carlo simulation results of $z_c \approx 97.5$, and is an improvement over earlier best estimates of $z_c=54.87$ and $z_c=135.63$.
description: 19 pages, 10 figures
The fate of a discrete time crystal in an open system
Creators: name: Lazarides, Achilleas
name: Moessner, Roderich
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Following the recent realisation that periodically driven quantum matter can support new types of spatiotemporal order, now known as discrete time crystals (DTCs), we consider the stability of this phenomenon. Motivated by its conceptual importance as well as its experimental relevance we consider the effect of coupling to an external environment. We use this to argue, both analytically and numerically, that the DTC in disordered one-dimensional systems is destroyed at long times by any such natural coupling. This holds true even in the case where the coupling is such that the system is prevented from heating up by an external thermal bath.
A study of jamming on QPSK modulation
Creators: name: Yang, Enbo
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: As the increased use of digital communication continues, the communication environment becomes more challenging than before. QPSK Modulation is widely used as a current digital communication method, in particular on the wireless communication network and high-performance communication links. The purpose of this thesis is to follow with a systematical study on the digital communication system , modulation methods and jamming methods, from the simulated result, estimate the performance for different types of jamming which affect QPSK modulation, determine the performance of each jamming schemes in a particular condition, and how the limited jamming signal powerwill be used effectively. And this thesis has estimated the effectiveness of one jamming (single-tone jamming and multi-tone jamming) that affect the QPSK Modulation from comparing the bit error rate (BER) of the communication system.
Relaxation functions and dynamical heterogeneities in a model of chemical gel interfering with glass transition
Creators: name: de Candia, Antonio
name: Fierro, Annalisa
name: Pastore, Raffaele
name: Ciamarra, Massimo Pica
name: Coniglio, Antonio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the heterogeneous dynamics in a model, where chemical gelation and glass transition interplay, focusing on the dynamical susceptibility. Two independent mechanisms give raise to the correlations, which are manifested in the dynamical susceptibility: one is related to the presence of permanent clusters, while the other is due to the increase of particle crowding as the glass transition is approached. The superposition of these two mechanisms originates a variety of different behaviours. We show that these two mechanisms can be unentangled considering the wave vector dependence of the dynamical susceptibility.
description: The final publication is available at Springer via http://dx.doi.org/10.1140/epjst/e2016-60175-x
Serieys_Fig_S3_ESM.pdf from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: a) Receiver operator curves for a random forests model that use a suite of 65 health measures to predict AR exposure. b) Results presented are from a model that also includes urban land use information. The performance of each model as quantified by area under the curve (AUC), where a higher value indicates better performance, are also noted on each panel.
title: ADCO, Cartulaire de Fontenay, premier fragment (XIIIe siècle), Cart. 201 (15 H 9), 175 folios, f. 055v
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Corpus Burgundiae Medii Aevi
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire de Fontenay, premier fragment (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 201 (15 H 9), 175 folios. Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Fontenay, premier fragment (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 201 (15 H 9), 175 folios, f. 055v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Fontenay
description: Provenance: http://www.wikidata.org/entity/Q464918
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb119679755
description: Provenance: https://www.geonames.org/7874015
description: Provenance: http://www.idref.fr/027691802/id
Serieys_Fig_S1_ESM.pdf from Urbanization and anticoagulant poisons promote immune dysfunction in bobcats
Creators: name: Serieys, Laurel E. K.
name: Lea, Amanda J.
name: Epeldegui, Marta
name: Armenta, Tiffany C.
name: Moriarty, Joanne
name: VandeWoude, Sue
name: Carver, Scott
name: Foley, Janet
name: Wayne, Robert K.
name: Riley, Seth P. D.
name: Uittenbogaart, Christel H.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Boxplots showing the percent urban area in buffer zones for bobcats with ARs detected in blood (exposed) compared with bobcats with no ARs detected (unexposed).
Negative Temperature Pressure in Black Holes
Creators: name: Norte, Richard A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Space Physics (physics.space-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The concept of negative temperature (T < 0) is unique to quantum physics and describes systems that are hotter than any positive temperature system. For decades negative temperatures have been shown in a number of spin systems, but experiments only recently demonstrated atomic ensembles with negative temperatures in their motional degrees of freedom. An observed behavior of such negative temperature ensembles is that despite highly attractive forces between an arbitrary number of particles, there is a self-stabilization against collapse. Negative temperatures are only possible in quantum systems because there exists upper bounds on the energy of particles -- a property not found in classical physics. Here we consider whether event horizons set up similar upper limits within black holes, giving rise to negative temperature systems just within event horizons. Combining black hole thermodynamics with experimentally observed negative temperature effects could imply a quantum-based outward pressure in black holes.
Dynamically controlled plasmonic nano-antenna phased array utilizing vanadium dioxide
Creators: name: Kaplan, Gregory
name: Aydin, Koray
name: Scheuer, Jacob
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose and analyze theoretically an approach for realizing a tunable optical phased-array antenna utilizing the properties of VO2 for electronic beam steering applications in the near-IR spectral range. The device is based on a 1D array of slot nano-antennas engraved in a thin Au film grown over VO2 layer. The tuning is obtained by inducing a temperature gradient over the device, which changes the refractive index of the VO2, and hence modifies the phase response of the elements comprising the array, by producing a thermal gradient within the underlying PCM layer. Using a 10-element array, we show that an incident beam can be steered up to with respect to the normal, by applying a gradient of less than 10°C.
Measuring Tracers of Planet Formation in the Atmosphere of WASP-77A b: Sub-stellar O/H and C/H ratios, with a stellar C/O ratio and a potentially Super-stellar Ti/H ratio
Creators: name: Edwards, Billy
name: Changeat, Quentin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a comprehensive atmospheric retrieval study of the hot Jupiter WASP-77A\,b using eclipse observations from the Hubble Space Telescope (HST) and JWST. Using atmospheric retrievals, the spectral features of H$_2$O, CO, and TiO are identified, with volume mixing ratios estimated at log$_{\rm 10}$(VMR) = -4.40$^{+0.14}_{-0.11}$, -4.44$^{+0.34}_{-0.28}$, and -6.40$^{+0.22}_{-0.23}$, respectively. We derive the atmospheric carbon-to-oxygen ratio -- a key planetary formation tracer -- to be C/O = 0.54$\pm$0.12, which is consistent with both the stellar host value and previous studies of the planet's atmosphere, suggesting a relatively close-in formation. Computing other elemental ratios (i.e., C/H, O/H, and Ti/H), we conclude that the general enrichment of the atmosphere (i.e., metallicity) is sub-stellar, is depleted in C and O, but that Ti appears slightly super-stellar. A low C and O content could be obtained, in combination with a stellar C/O ratio, if the planet formed outside of the CO$_2$ snow line before migrating inwards. Meanwhile, a super-stellar Ti/H could be obtained by late contamination from refractory rich planetesimals. While broadly in agreement with previous works, we do find some differences and discuss these while also highlighting the need for homogeneous analyses when comparative exoplanetology is conducted.
description: Accepted for publication in ApJL (December 2023)
PEG-coumarin nanoaggregates as π–π stacking derived small molecule lipophile containing self-assemblies for anti-tumour drug delivery
Creators: name: Behl, Gautam
name: Kumar, Parveen
name: Sikka, Manisha
name: Fitzhenry, Laurence
name: Chhikara, Aruna
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: Polymeric self-assemblies formed by non-covalent interactions such as hydrophobic interactions, hydrogen bonding, π–π stacking, host-guest and electrostatic interactions have been utilised widely and exhibit controlled release of encapsulated drug. Beside carrier-carrier interactions, small molecule amphiphiles exhibiting carrier-drug interactions have recently been an area of interest for cancer drug delivery, as most of the hydrophobic anti-tumour drugs are aromatic and exhibit π–π conjugated structure. In the present study PEG-coumarin (PC) conjugates forming self-assembled nanoaggregates were synthesised with PEG (polyethylene glycol) as hydrophilic block and coumarin as small molecule lipophilic segment. Curcumin (CUR) as model conjugated aromatic drug was loaded in to the nanoaggregates via dual hydrophobic and π–π stacking interactions. The interactions between the conjugates and CUR, drug release profile and in vitro anti-tumour efficacy were investigated in detail. CUR-loaded nanoaggregate self-assembly was driven by π–π interactions and a maximum loading level of about 18 wt.% (~60 % encapsulation efficiency) was achieved. The average hydrodynamic diameter (Dav) was in the range of 120–160 nm and a spherical morphology was observed by transmission electron microscopy (TEM). A sustained release of CUR was observed for 90 h. Cytotoxicity evaluation of CUR-loaded nanoaggregates on pancreatic cancer cell lines indicated higher efficacy, IC50 ~11 and ~15 μM as compared to free CUR, IC50 ~14 and ~20 μM on human pancreatic carcinoma (MIA PaCa-2) and human pancreatic duct epithelioid carcinoma (PANC-1) cell lines respectively. PC conjugates provided a new strategy of fabricating nanoparticles for drug delivery and may form the basis for the development of advanced biomaterials in near future.
Reflexivity in Action: Building Student Resilience During A Pandemic
Creators: name: Downey, Heather
name: Long, Maureen
Publisher: name: La Trobe
Year: 2021

description: ABSTRACT:
The current novel coronavirus, COVID-19, has transformed social work tertiary education
delivery across the world. In this case, the university’s response was to
initiate a hasty transition from a 'blended' program, comprised of both the use
of technology and face to face components, into an entirely online learning
model. This scenario suggested a need for academics to be open to creative ways
of building and maintaining relationships with students to facilitate positive
learning outcomes and student wellbeing. This article uses reflexivity to
examine two vignettes that present our responses to students’ collective and
individual issues experienced during the COVID-19 isolation period in Australia.
A reflexive lens illuminated the role of practical, emotional, and relational
work in social work education in a virtual context. Specifically, this article offers
important insights for academics concerning ways social work students and
academics may work together to create a sense of hopefulness during uncertain
times.
Controls on organic carbon enrichment in a Permian periglacial setting (Arckaringa Basin)
Creators: name: Debenham, Natalie
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: In the Arckaringa Basin, organic carbon (OC) enrichment within the Permo-Carboniferous Stuart Range Formation occurred within syn-sedimentary fault troughs that were scoured by glaciers. This enrichment was facilitated by sytematic variations in water chemistry within these troughs identifying periods of restriction and open water exchange with the ocean to the south. The U-shaped morphology of some of these troughs apparent in seismic profiles along with the presence of lonestones, dropstones, and feldspathic, angular sediment identifies a cold palaeoclimate depositional setting that is unusual for the organic enrichments of up to 12% total organic carbon (TOC). It is hypothesised that episodic restriction within these fjord-like troughs led to cyclical variations in sulphur concentration within the water column, driving sulfurization reactions that preserved organic matter in discreet laminae. Abundant pyrite (up to 20 wt%) and the distribution of organosulphur compounds with TOC supports this hypothesis. Cyclical oxygenation of bottom waters and alkalinity from OM mineralisation by bacterial sulphate reducers resulted in the formation of manganese carbonate (kutnohorite) during periods of ventilation. Organic-lean sediments in the adjacent lacustrine Cooper Basin that lacked a source of marine sulphur do not show vulcanization nor preservation of labile organic matter.
Faithful conversion of propagating quantum information to mechanical motion
Creators: name: Reed, A. P.
name: Mayer, K. H.
name: Teufel, J. D.
name: Burkhart, L. D.
name: Pfaff, W.
name: Reagor, M.
name: Sletten, L.
name: Ma, X.
name: Schoelkopf, R. J.
name: Knill, E.
name: Lehnert, K. W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We convert propagating qubits encoded as superpositions of zero and one photons to the motion of a micrometer-sized mechanical resonator. Using quantum state tomography, we determine the density matrix of both the propagating photons and the mechanical resonator. By comparing a sufficient set of states before and after conversion, we determine the average process fidelity to be $F_{\textrm{avg}} = 0.83\substack{+0.03-0.06}$ which exceeds the classical bound for the conversion of an arbitrary qubit state. This conversion ability is necessary for using mechanical resonators in emerging quantum communication and modular quantum computation architectures.
description: 22 pages, 14 figures (including Supplementary Information)
Luttinger parameter of quasi-one-dimensional para-H2
Creators: name: Ferre, G
name: Gordillo, M. C.
name: Boronat, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have studied the ground-state properties of para-hydrogen in one dimension and in quasi-one-dimensional configurations using the path integral ground state Monte Carlo method. This method produces zero-temperature exact results for a given interaction and geometry. The quasi-one-dimensional setup has been implemented in two forms: the inner channel inside a carbon nanotube coated with H$_2$ and a harmonic confinement of variable strength. Our main result is the dependence of the Luttinger parameter on the density within the stable regime. Going from one dimension to quasi-one dimension, keeping the linear density constant, produces a systematic increase of the Luttinger parameter. This increase is however not enough to reach the superfluid regime and the system always remain in the quasi-crystal regime, according to Luttinger liquid theory.