cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Code for Rethinking pandemic responses to promote sustainability and reduce inequality
Creators: name: Li, Cai
name: Deng, Zhongci
name: Wang, Zhen
name: Hu, Yuanchao
name: Wang, Ling
name: Yu, Shuxia
name: Li, Wei
name: Shi, Zhihua
name: Bryan, Brett
Publisher: name: figshare
Year: 2022
Subjects: Economic models and forecasting

description: COVID-19 pandemic response measures have brought unprecedented challenges to the UN 2030 Agenda for the Sustainable Development Goals (SDGs) and a quantitative, multi-dimensional assessment of the impacts of these response measures on SDG progress is required. Here, we use an adaptive multi-regional input-output model to quantitatively assess the impact of pandemic responses on global and national SDG progress and show that COVID-19 pandemic responses (i.e., movement restrictions, fiscal stimuli, and trade restrictions) have reduced overall progress towards the SDGs by 7.2%, with socio-economic sustainability scores declining by 23.9% while environmental sustainability scores improved by 11.6% compared with the BAU trend. Developing countries suffered slightly greater reductions in overall sustainability (7.8%) than developed countries (6.4%). Under all post-pandemic futures, pandemic responses impeded overall progress towards the 2030 Agenda and worsened inequality in sustainable development between countries, particularly for socioeconomic targets. A post-pandemic strategy toward the UN 2030 Agenda requires sustainable pandemic responses, which not only address inequality among countries but also lessen the trade-offs between SDGs.
Night sky brightness at San Pedro Martir Observatory
Creators: name: Plauchu-Frayn, I.
name: Richer, M. G.
name: Colorado, E.
name: Herrera, J.
name: Cordova, A.
name: Cesena, U.
name: Avila, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present optical UBVRI zenith night sky brightness measurements collected on eighteen nights during 2013--2016 and SQM measurements obtained daily over twenty months during 2014--2016 at the Observatorio Astronomico Nacional on the Sierra San Pedro Martir (OAN-SPM) in Mexico. The UBVRI data is based upon CCD images obtained with the 0.84m and 2.12m telescopes, while the SQM data is obtained with a high-sensitivity, low-cost photometer. The typical moonless night sky brightness at zenith averaged over the whole period is U = 22.68, B = 23.10, V = 21.84, R = 21.04, I = 19.36, and SQM = 21.88 mag/square arcsec, once corrected for zodiacal light. We find no seasonal variation of the night sky brightness measured with the SQM. The typical night sky brightness values found at OAN-SPM are similar to those reported for other astronomical dark sites at a similar phase of the solar cycle. We find a trend of decreasing night sky brightness with decreasing solar activity during period of the observations. This trend implies that the sky has become darker by delta_U =0.7, delta_B =0.5, delta_V =0.3, delta_R =0.5 mag/square arcsec since early 2014 due to the present solar cycle.
description: 15 pages, 12 figures. Accepted to Publications of the Astronomical Society of the Pacific
Critical success factors for m-commerce in Saudi Arabia's private sector -- a multiple case study analysis
Creators: name: Alturaigi, Norah Suliman
name: Altameem, Abdullah Abdulaziz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Many developing country firms are investing huge money in the sector of mobile commerce m commerce Simplifying and understanding the factors which can impact on m commerce success enables the organisations managers to focus their efforts on the key areas of their m commerce businesses thereby contributing to the successful implementation of m commerce This study provides a clear understanding of m commerce in the private sector in the Kingdom of Saudi Arabia and identifies the critical success factors of implementing m commerce within the local business environment A case study approach will be used for five Saudi companies which use mcommerce represented by Alrajhi Bank Souqcom Saudi Electricity Company Saudi telecom company STC and Saudi Airlines This study represents a research in progress and interviews based on the literature to identify the key success factors for these companies in particular and in Saudi Arabia s private sector in general
description: 10 pages, 2015. International Journal of Information Technology Convergence and Services IJITCS
Datasets and script for the analysis of the innate and learned close-range foraging behaviour of a stink bug egg parasitoid
Creators: name: RONDONI, GABRIELE
name: Chierici, Elena
name: Daher, Elissa
name: Famiani, Franco
name: Brodeur, Jacques
name: Conti, Eric
Publisher: name: Zenodo
Year: 2024

description: We provide main document, data, R script for analysis of data related to: Rondoni, G., Chierici, E., Daher, E., Famiani, F., Brodeur, J., & Conti, E. (2024). How exposure to a neonicotinoid pesticide affects innate and learned close-range foraging behaviour of a classical biological control agent. Biological Control, 196, 105568.

Keywords: Arma custos, entomology, Halyomorpha halys, invasive species, Trissolcus japonicus

Funding: The project leading to this application has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement NUMBER 101026399 – PESTNET.
NuSTAR Observations of the Black Hole GS 1354-645: Evidence of Rapid Black Hole Spin
Creators: name: El-Batal, A. M.
name: Miller, J. M.
name: Reynolds, M. T.
name: Boggs, S. E.
name: Chistensen, F. E.
name: Craig, W. W.
name: Fuerst, F.
name: Hailey, C. J.
name: Harrison, F. A.
name: Stern, D. K.
name: Tomsick, J.
name: Walton, D. J.
name: Zhang, W. W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of a NuSTAR study of the dynamically confirmed stellar-mass black hole GS 1354-645. The source was observed during its 2015 "hard" state outburst; we concentrate on spectra from two relatively bright phases. In the higher-flux observation, the broadband NuSTAR spectra reveal a clear, strong disk reflection spectrum, blurred by a degree that requires a black hole spin of a = cJ/GM^2 > 0.98 (1 sigma statistical limits only). The fits also require a high inclination: theta = 75(2) degrees. Strong "dips" are sometimes observed in the X-ray light curves of sources viewed at such an angle; these are absent, perhaps indicating that dips correspond to flared disk structures that only manifest at higher accretion rates. In the lower-flux observation, there is evidence of radial truncation of the thin accretion disk. We discuss these results in the context of spin in stellar-mass black holes, and inner accretion flow geometries at moderate accretion rates.
description: Accepted for publication in ApJ Letters
Supplementary Material 2.pdf from Food transport in Reptilia: a comparative viewpoint
Creators: name: Bels, Vincent
name: Le Floch, Glenn
name: Kirchhoff, Florence
name: Gastebois, Gilbert
name: Davenport, John
name: Baguette, Michel
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Biomechanics
subject: Animal Behaviour

description: Representative cycles of inertial food crushing associated with transport and lingual-based transport just before swallowing in Alligator mississipiensis.
Codes_Submitted.zip
Creators: name: Cheng, Shawn
Publisher: name: figshare
Year: 2023
Subjects: Bioinformatic methods development
Genomics and transcriptomics
Biological network analysis

description: This is the codes for our method PRIME and the research results obtained on the MSBB data base with 19 brain regions.
 Title of the preprint: Machine Learning Algorithm Derives Circadian Oscillation Patterns from Untimed Genome-wide Gene Expression across Multiple Brain Regions and Uncovers Their Associations with Alzheimer’s Disease
 Abstract:  The disruption of circadian rhythm is a key symptom for Alzheimer’s disease (AD). The full circadian rhythm
 orchestration of gene expression in the human brain and its inherent associations with AD remain largely unknown. In
 addition, almost all of existing AD circadian rhythms’ studies depend on the sample’s timestamps, which are practically
 difficult to obtain through clinically interval sampling or sometimes inaccurate. We present a novel comprehensive
 approach, PRIME, to detect and analyze rhythmic oscillation patterns in untimed high-dimensional gene expression
 data across multiple datasets. To demonstrate the utility of PRIME, firstly, we validate it by a time course expression
 dataset from mouse liver as a cross-species and cross-organ validation. Then, we apply it to study oscillation patterns in
 untimed genome-wide gene expression from 19 human brain regions of controls and AD patients. Our findings reveal
 clear, synchronized oscillation patterns in 15 pairs of brain regions of control, while these synchronized oscillation
 patterns either disappear or dim for AD. Further, the results are validated by employing three different statistical
 correlation analyses and comparing the correlations with 8 well-known circadian clock genes selected on corresponding
 brain regions (single gene ARNTL, single gene RORA, and the synergy of ARNTL, CSNK1E, NPAS2, NR1D2, PER1,
 PER2, PER3, and RORA, respectively). Also, we present rules to infer the AD’s impacts on human brain regions. It is
 worth noting that PRIME discovers the circadian rhythmic patterns without requiring the sample’s timestamps which
 are clinically difficult to obtain, particularly for human brain tissue due to the highly invasive nature.
 Methods The dataset contains the Python codes for PRIME, which is our method for extacting circadian rhythmic patterns and for subsequent interregional syncrony modeling.
 Usage notes Python
Observation of optomechanical coupling in a microbottle resonator
Creators: name: Asano, Motoki
name: Takeuchi, Yuki
name: Chen, Weijian
name: Özdemir, Şahin Kaya
name: Ikuta, Rikizo
name: Imoto, Nobuyuki
name: Yang, Lan
name: Yamamoto, Takashi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this work, we report optomechanical coupling, resolved sidebands and phonon lasing in a solid-core microbottle resonator fabricated on a single mode optical fiber. Mechanical modes with quality factors (Q_m) as high as 1.57*10^4 and 1.45*10^4 were observed, respectively, at the mechanical frequencies f_m=33.7 MHz and f_m=58.9 MHz. The maximum f_m*Q_m~0.85*10^12 Hz is close to the theoretical lower bound of 6*10^12 Hz needed to overcome thermal decoherence for resolved-sideband cooling of mechanical motion at room temperature, suggesting microbottle resonators as a possible platform for this endeavor. In addition to optomechanical effects, scatter-induced mode splitting and ringing phenomena, which are typical for high-quality optical resonances, were also observed in a microbottle resonator.
Tensions and opportunities at Shanghai’s waterfronts
Creators: name: Den Hartog, Harry
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2023

description: How can the Global North oriented and welfare state rooted Sustainability Transitions theories be enriched with the Chinese and communist state rooted Ecological Civilization thinking that has been included in the Chinese constitution since 2007, to make it able to evaluate the making of the direct-controlled municipality Shanghai into an institutional frontrunner of sustainable transitions in urban planning and design with its prime waterfront as exemplary ‘urban lab’? Around this central question, this dissertation examines how Shanghai's coastal and waterfront developments have changed over the past two decades under the influence of shifts in Chinese state capitalism towards what is called an Ecological Civilization. Two cases along the waterfronts of Shanghai – one on former docklands, and one on Chongming Island ¬– have been examined to test how both lines of thinking can enrich each other, and if a sustainable transition can be done more efficiently and convincingly in a centrally controlled society than in a non-autocratic (liberal) society. What lessons does the Chinese approach in Shanghai offer for elsewhere, and how can different approaches and practices reinforce each other in the field of spatial planning and strategies for a sustainable transition? This dissertation emphasizes that ecological civilization thinking can offer hopeful starting points for sustainable transitions but can only work well if 'checks and balances’ are included. It gives suggestions to improve the accessibility, inclusivity, and vibrancy of Shanghai’s waterfronts, and mitigate ecological degradation in the context of an urban delta.
description: A+BE | Architecture and the Built Environment, No. 18 (2023): Tensions and opportunities at Shanghai’s waterfronts
Synthetic data products for future HI galaxy surveys: a tool for characterising source confusion in spectral line stacking experiments
Creators: name: Elson, E. C.
name: Blyth, S. L.
name: Baker, A. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Much of our current understanding of neutral, atomic gas in galaxies comes from radio observations of the nearby Universe. Until the next generation of instruments allow us to push to much higher redshifts, we must rely mostly upon theoretical models of galaxy formation to provide us with key insights into the likely cosmic evolution of HI in the Universe, and its links to molecular clouds and star formation. In this work, we present a new set of methods to convert mock galaxy catalogues into synthetic data cubes containing model galaxies with realistic spatial and spectral HI distributions over large cosmological volumes. Such synthetic data products can be used to guide observing and data handling/analysis strategies for forthcoming HI galaxy surveys. As a demonstration of the potential use of our simulated products we use them to conduct several mock HI stacking experiments for both low and high-redshift galaxy samples. The stacked spectra can be accurately decomposed into contributions from target and non-target galaxies, revealing in all co-added spectra large fractions of contaminant mass due to source confusion. Our results are consistent with similar estimates extrapolated from z=0 observational data. The amount of confused mass in a stacked spectrum grows almost linearly with the size of the observational beam, suggesting potential over-estimates of Omega_HI by some recent HI stacking experiments. Our simulations will allow the study of subtle redshift-dependent effects in future stacking analyses.
description: 16 pages, 16 figures, accepted for publication in MNRAS
Report on temperatures of the food cold chain at consumer level in Europe
Creators: name: Bonanno, Ludivine
name: Bergis, Hélène
Publisher: name: Zenodo
Year: 2021
Subjects: subject: European Union
subject: EURL Lm
subject: Listeria monocytogenes
subject: temperatures of the food cold chain
subject: consumer level
subject: shelf-life study
subject: durability study
subject: challenge test
subject: https://www.cabi.org/cabithesaurus/mtwdk.exe?k=default&l=60&w=201992&s=5&t=2

description: The cold chain is essential for guaranteeing the quality and safety of chilled foods. The final step of the cold chain, storage in domestic refrigerators, is mimicked in challenge tests assessing the growth potential and durability studies for chilled food products.
 In recent years, few surveys have been carried out in Europe on the storage temperatures of domestic refrigerators. Gathering available data on this step is important since this storage condition can have a significant impact on the behaviour of Listeria monocytogenes (Lm) in ready-to-eat (RTE) foods and thus on the microbiological safety of chilled food products.
 The European Union Reference Laboratory for Listeria monocytogenes (EURL Lm) has planned to reconsider the default temperature of the cold chain at consumer level (12°C) set out in Table 3 of the EURL Lm Technical Guidance Document for conducting shelf-life studies on L. monocytogenes in ready-to-eat foods –Version 3 of 6 June 2014 – Amendment 1 of 21 February 2019.
 This work was conducted in 2020 with the collaboration of a working group of volunteering 8 NRLs: Marie POLET (Sciensano, BE-NRL), Jens KIRK ANDERSEN (DTU Food, DK-NRL), Bernadette HICKEY (Department of Agriculture, Food and Marine, IE-NRL), Luigi IANNETTI (IZS Teramo, IT-NRL), Paul IN’T VELD (NWVA, NL Competent Authority and c/o NL-NRL), Gonçalo Nieto ALMEIDA (Iniav, PT-NRL), Linda EVERIS (Campden BRI, c/o UK-NRL), Monica RICÃO CANELHAS (SLV, SE-NRL).
 In order to be as realistic as possible, when conducting shelf-life studies, EURL Lm reviewed available data in Europe on storage temperatures of domestic refrigerators based on (a) data from national surveys and (b) from scientific literature in the recent years.
 The collected data was considered in order to (i) get a better knowledge of refrigerator temperatures at consumer level and (ii) to better assess the shelf-life of RTE food regarding Listeria monocytogenes.
description: Funding by: EUROPEAN HEALTH AND DIGITAL EXECUTIVE AGENCY (HADEA) - HaDEA.A – Health and Food Directorate A2.002 - EU4Health/SMP Food Unit Project: [EURLs-EURCs/2021-2022/SI2.870826]
Today a Duo, But Once a Trio? The Double White Dwarf HS 2220$+$2146 May Be A Post-Blue Straggler Binary
Creators: name: Andrews, Jeff J.
name: Agüeros, Marcel
name: Brown, Warren R.
name: Gosnell, Natalie M.
name: Gianninas, A.
name: Kilic, Mukremin
name: Koester, Detlev
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: For sufficiently wide orbital separations {\it a}, the two members of a stellar binary evolve independently. This implies that in a wide double white dwarf (DWD), the more massive WD should always be produced first, when its more massive progenitor ends its main-sequence life, and should therefore be older and cooler than its companion. The bound, wide DWD HS 2220$+$2146 ($a\approx500$ AU) does not conform to this picture: the more massive WD is the younger, hotter of the pair. We show that this discrepancy is unlikely to be due to past mass-transfer phases or to the presence of an unresolved companion. Instead, we propose that HS 2220$+$2146 formed through a new wide DWD evolutionary channel involving the merger of the inner binary in a hierarchical triple system. The resulting blue straggler and its wide companion then evolved independently, forming the WD pair seen today. Although we cannot rule out other scenarios, the most likely formation channel has the inner binary merging while both stars are still on the main sequence. This provides us with the tantalizing possibility that Kozai-Lidov oscillations may have played a role in the inner binary's merger. {\it Gaia} may uncover hundreds more wide DWDs, leading to the identification of other systems like HS 2220$+$2146. There are already indications that other WD systems may have been formed through different, but related, hierarchical triple evolutionary scenarios. Characterizing these populations may allow for thorough testing of the efficiency with which KL oscillations induce stellar mergers.
description: Accepted for publication in ApJ, 12 pages, 6 figures, 2 tables
Energetics of H$_2$ clusters from density functional and coupled cluster theories
Creators: name: Trail, J. R.
name: Ríos, P. López
name: Needs, R. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We use coupled-cluster quantum chemical methods to calculate the energetics of molecular clusters cut out of periodic molecular hydrogen structures that model observed phases of solid hydrogen. The hydrogen structures are obtained from Kohn-Sham density functional theory (DFT) calculations at pressures of 150, 250 and 350 GPa, which are within the pressure range in which phases II, III and IV are found to be stable. The calculated deviations in the DFT energies from the coupled-cluster data are reported for different functionals, and optimized functionals are generated which provide reduced errors. We give recommendations for semi-local and hybrid density functionals that are expected to accurately describe hydrogen at high pressures.
Modelling the $γ$-ray variability of 3C 273
Creators: name: Zheng, Y. G.
name: Zhang, L.
name: Huang, B. R.
name: Kang, S. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate MeV-GeV $γ$-ray outbursts in 3C 273 in the frame of a time-dependent one-zone synchrotron self-Compton (SSC) model. In this model, electrons are accelerated to extra-relativistic energy through the stochastic particle acceleration and evolve with the time, nonthermal photons are produced by both synchrotron and inverse Compton scattering of synchrotron photons. Moreover, nonthermal photons during a quiescent are produced by the relativistic electrons in the steady state and those during a outburst are produced by the electrons whose injection rate is changed at some time interval. We apply the model to two exceptionally luminous $γ$-ray outbursts observed by the Fermi-LAT from 3C 273 in September, 2009 and obtain the multi-wavelength spectra during the quiescent and during the outburst states, respectively. Our results show that the time-dependent properties of outbursts can be reproduced by adopting the appropriate injection rate function of the electron population.
description: 6 pages, 5 figures, published in MNRAS (2013MNRAS.431.2356Z)
Thallium under extreme compression
Creators: name: Cazorla, C.
name: MacLeod, S. G.
name: Errandonea, D.
name: Munro, K. A.
name: McMahon, M. I.
name: Popescu, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a combined theoretical and experimental study of the high-pressure behavior of thallium. X-ray diffraction experiments have been carried out at room temperature up to 125 GPa using diamond-anvil cells, nearly doubling the pressure range of previous experiments. We have confirmed the hcp-fcc transition at 3.5 GPa and determined that the fcc structure remains stable up to the highest pressure attained in the experiments. In addition, HP-HT experiments have been performed up to 8 GPa and 700 K by using a combination of x-ray diffraction and a resistively heated diamond-anvil cell. Information on the phase boundaries is obtained, as well as crystallographic information on the HT bcc phase. The equation of state for different phases is reported. Ab initio calculations have also been carried out considering several potential high-pressure structures. They are consistent with the experimental results and predict that, among the structures considered in the calculations, the fcc structure of thallium is stable up to 4.3 TPa. Calculations also predict the post-fcc phase to have a close-packed orthorhombic structure above 4.3 TPa.
description: 29 pages, 14 figures
The Impact of Unresolved Turbulence on the Escape Fraction of Lyman Continuum Photons
Creators: name: Safarzadeh, Mohammadtaher
name: Scannapieco, Evan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the relation between the turbulent Mach number (\mach) and the escape fraction of Lyman continuum photons ($f_{\rm esc}$) in high-redshift galaxies. Approximating the turbulence as isothermal and isotropic, we show that the increase in the variance in column densities from $\mathcal{M}=1$ to $\mathcal{M}=10$ causes $f_{\rm esc}$ to increase by $\approx 25$\%, and the increase from $\mathcal{M}=1$ to $\mathcal{M}=20$ causes $f_{\rm esc}$ to increases by $\approx 50$\% for a medium with opacity $τ\approx1$. At a fixed Mach number, the correction factor for escape fraction relative to a constant column density case scales exponentially with the opacity in the cell, which has a large impact for simulated star forming regions. Furthermore, in simulations of isotropic turbulence with full atomic/ionic cooling and chemistry, the fraction of HI drops by a factor of $\approx 2.5$ at $\mathcal{M}\approx10$ even when the mean temperature is $\approx5\times10^3 K$. If turbulence is unresolved, these effects together enhance $f_{\rm esc}$ by a factor $>3$ at Mach numbers above 10. Such Mach numbers are common at high-redshifts where vigorous turbulence is driven by supernovae, gravitational instabilities, and merger activity, as shown both by numerical simulations and observations. These results, if implemented in the current hydrodynamical cosmological simulations to account for unresolved turbulence, can boost the theoretical predictions of the Lyman Continuum photon escape fraction and further constrain the sources of reionization.
description: 5 pages, 3 figures, accepted for publication in ApJ Letters
Quantifying fusion born ion populations in magnetically confined plasmas using ion cyclotron emission
Creators: name: Carbajal, L.
name: Dendy, R. O.
name: Chapman, S. C.
name: Cook, J. W. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Ion cyclotron emission (ICE) offers unique promise as a diagnostic of the fusion born alpha-particle population in magnetically confined plasmas. Pioneering observations from JET and TFTR found that ICE intensity $P_{ICE}$ scales approximately linearly with the measured neutron flux from fusion reactions, and with the inferred concentration, $n_α/n_i$, of fusion-born alpha-particles confined within the plasma. We present fully nonlinear self-consistent kinetic simulations that reproduce this scaling for the first time. This resolves a longstanding question in the physics of fusion alpha-particle confinement and stability in MCF plasmas. It confirms the magnetoacoustic cyclotron instability (MCI) as the likely emission mechanism and greatly strengthens the basis for diagnostic exploitation of ICE in future burning plasmas.
X-ray and gamma-ray variability of Mrk 421
Creators: name: Zheng, Y. G.
name: Kang, S. J.
name: Li, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an ordinary case in the momentum diffusion equation for the electron spectrum evolution and investigate the energy spectra and time dependent properties of flare in Mrk 421 in the frame of a time-dependent one-zone synchrotron self-Compton model. In this model, electrons are accelerated to extra-relativistic energy through the strong magnetic turbulence and evolve with time, and non-thermal photons are produced by both synchrotron and inverse Comtpon scattering off synchrotron photons. Moreover, non-thermal photons during a pre-flare are produced by the relativistic electrons in the steady state and those during a flare are produced by the electrons whose injection rate is changed during some time interval. We apply the model to the energy spectra and time-dependent properties of flares in Mrk 421 by reproducing the pre-burst spectrum of the source and varying the injection rate in the Bohm diffusion (q=1) and the hard sphere approximation (q=2) case, respectively. Our results show that Bohm diffusion case leads to hard photon spectra, and hard sphere case approximation seems to reproduce the energy spectra and the time dependent properties of flare still better.
description: 10 pages, 7 figures, published in MNRAS (2014MNRAS.442.3166Z)
Ab initio effective rotational and rovibrational Hamiltonians for non-rigid systems via curvilinear second order vibrational Møller-Plesset perturbation theory
Creators: name: Changala, P. Bryan
name: Baraban, Joshua H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a perturbative method for ab initio calculations of rotational and rovibrational effective Hamiltonians of both rigid and non-rigid molecules. Our approach is based on a curvilinear implementation of second order vibrational Møller-Plesset perturbation theory (VMP2) extended to include rotational effects via a second order contact transformation. Though more expensive, this approach is significantly more accurate than standard second order vibrational perturbation theory (VPT2) for systems that are poorly described to zeroth order by rectilinear normal mode harmonic oscillators. We apply this method and demonstrate its accuracy on two molecules: Si$_2$C, a quasilinear triatomic with significant bending anharmonicity, and CH$_3$NO$_2$, which contains a completely unhindered methyl rotor. In addition to these two examples, we discuss several key technical aspects of the method, including an efficient implementation of Eckart and quasi-Eckart frame embedding that does not rely on numerical finite differences.
description: 15 pages, 2 figures
Giant Faraday rotation of high-order plasmonic modes in graphene-covered nanowires
Creators: name: Kuzmin, Dmitry A.
name: Bychkov, Igor V.
name: Shavrov, Vladimir G.
name: Temnov, Vasily V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Plasmonic Faraday rotation in nanowires manifests itself in the rotation of the spatial intensity distribution of high-order surface plasmon polariton (SPP) modes around the nanowire axis. Here we predict theoretically the giant Faraday rotation for SPP propagating on graphene-coated magneto-optically active nanowires. Upon the reversal of the external magnetic field pointing along the nanowire axis some high-order plasmonic modes may be rotated by up to ~ 100 degrees on scale of about 500 nm at mid-infrared frequencies. Tuning carrier concentration in graphene by chemical doping or gate voltage allows for controlling SPP-properties and notably the rotation angle of high-order azimuthal modes. Our results open the door to novel plasmonic applications ranging from nanowire-based Faraday isolators to the magnetic control in quantum-optical applications.
description: 15 pages, 3 figures, submitted to Nano Letters
Gauged B-L Number and Neutron--Antineutron Oscillation: Long-range Forces Mediated by Baryophotons
Creators: name: Addazi, Andrea
name: Berezhiani, Zurab
name: Kamyshkov, Yuri
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Transformation of neutron to antineutron is a small effect that has not yet been experimentally observed. %\cite{Phillips:2014fgb}. In principle, it can occur with free neutrons in the vacuum or with bound neutrons inside the nuclear environment different for neutrons and antineutrons and for that reason in the latter case it is heavily suppressed. Free neutron transformation also can be suppressed if environmental vector field exists destinguishing neutron from antineutron. We consider here the case of a vector field coupled to $B-L$ charge of the particles ($B-L$ photons) and study a possibility of this to lead to the observable suppression of neutron to antineutron transformation. The suppression effect however can be removed by applying external magnetic field. If the neutron--antineutron oscillation will be discovered in free neutron oscillation experiments, this will imply limits on $B-L$ photon coupling constant and interaction radius few order of magnitudes stronger than present limits form the tests of the equivalence principle. If $n-\bar n$ oscillation will be discovered via nuclear instability, but not in free neutron oscillations in corresponding level, this would indicate to the presence of fifth-forces mediated by such baryophotons.
description: 13 pages, 4 figures
The SAMI Galaxy Survey: the link between angular momentum and optical morphology
Creators: name: Cortese, L.
name: Fogarty, L. M. R.
name: Bekki, K.
name: van de Sande, J.
name: Couch, W.
name: Catinella, B.
name: Colless, M.
name: Obreschkow, D.
name: Taranu, D.
name: Tescari, E.
name: Barat, D.
name: Bland-Hawthorn, J.
name: Bloom, J.
name: Bryant, J. J.
name: Cluver, M.
name: Croom, S. M.
name: Drinkwater, M. J.
name: d'Eugenio, F.
name: Konstantopoulos, I. S.
name: Lopez-Sanchez, A.
name: Mahajan, S.
name: Scott, N.
name: Tonini, C.
name: Wong, O. I.
name: Allen, J. T.
name: Brough, S.
name: Goodwin, M.
name: Green, A. W.
name: Ho, I. -T.
name: Kelvin, L. S.
name: Lawrence, J. S.
name: Lorente, N. P. F.
name: Medling, A. M.
name: Owers, M. S.
name: Richards, S.
name: Sharp, R.
name: Sweet, S. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the relationship between stellar and gas specific angular momentum $j$, stellar mass $M_{*}$ and optical morphology for a sample of 488 galaxies extracted from the SAMI Galaxy Survey. We find that $j$, measured within one effective radius, monotonically increases with $M_{*}$ and that, for $M_{*}>$10$^{9.5}$ M$_{\odot}$, the scatter in this relation strongly correlates with optical morphology (i.e., visual classification and Sérsic index). These findings confirm that massive galaxies of all types lie on a plane relating mass, angular momentum and stellar light distribution, and suggest that the large-scale morphology of a galaxy is regulated by its mass and dynamical state. We show that the significant scatter in the $M_{*}-j$ relation is accounted for by the fact that, at fixed stellar mass, the contribution of ordered motions to the dynamical support of galaxies varies by at least a factor of three. Indeed, the stellar spin parameter (quantified via $λ_R$) correlates strongly with Sérsic and concentration indices. This correlation is particularly strong once slow-rotators are removed from the sample, showing that late-type galaxies and early-type fast rotators form a continuous class of objects in terms of their kinematic properties.
description: 16 pages, 8 figures, 1 table. Accepted for publication in MNRAS
High pressure crystal growth of the antiperovskite centrosymmetric superconductor SrPt3P
Creators: name: Zhigadlo, Nikolai D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bulk single crystals of SrPt3P have been grown for the first time by a self-flux method at 2 GPa and 1500 °C using the cubic-anvil, high-pressure and high-temperature technique. The grown black crystals were found to have either a plate-like or pillar-like morphology with maximum dimensions of ~ 1 - 0.6 - 0.3 mm3. According to a goniometric study the crystals are elongated in the ab-plane with the c-axis perpendicular to the plane. The crystal structure was confirmed by X-ray diffraction (P4/nmm, # 129, Z = 2, a = b = 5.7927(2) Å, c = 5.3729(2) Å and V = 180.290(11) Å3). Temperature dependent susceptibility measurements showed a single-phase behaviour and a superconducting transition temperature of 8.6 K. This value for single crystals is slightly higher than that previously reported for polycrystalline SrPt3P. The sharpness of the susceptibility drop (ΔTc = 0.07 K) supports a high homogeneity of obtained crystals.
description: 18 pages, 4 figures, 4 tables, accepted for J. Cryst. Growth
Evidence of ongoing radial migration in NGC 6754: Azimuthal variations of the gas properties
Creators: name: Sánchez-Menguiano, L.
name: Sánchez, S. F.
name: Kawata, D.
name: Chemin, L.
name: Pérez, I.
name: Ruiz-Lara, T.
name: Sánchez-Blázquez, P.
name: Galbany, L.
name: Anderson, J. P.
name: Grand, R. J. J.
name: Minchev, I.
name: Gómez, F. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Understanding the nature of spiral structure in disk galaxies is one of the main, and still unsolved questions in galactic astronomy. However, theoretical works are proposing new testable predictions whose detection is becoming feasible with recent development in instrumentation. In particular, streaming motions along spiral arms are expected to induce azimuthal variations in the chemical composition of a galaxy at a given galactic radius. In this letter we analyse the gas content in NGC 6754 with VLT/MUSE data to characterise its 2D chemical composition and H$α$ line-of-sight velocity distribution. We find that the trailing (leading) edge of the NGC 6754 spiral arms show signatures of tangentially-slower, radially-outward (tangentially-faster, radially-inward) streaming motions of metal-rich (poor) gas over a large range of radii. These results show direct evidence of gas radial migration for the first time. We compare our results with the gas behaviour in a $N$-body disk simulation showing spiral morphological features rotating with a similar speed as the gas at every radius, in good agreement with the observed trend. This indicates that the spiral arm features in NGC 6754 may be transient and rotate similarly as the gas does at a large range of radii.
description: 8 pages, 4 figures, accepted for publication in ApJL 2016 September 27
Quasi-two-dimensional Bose-Einstein condensation of spin triplets in dimerized quantum magnet Ba$_2$CuSi$_2$O$_6$Cl$_2$
Creators: name: Okada, Makiko
name: Tanaka, Hidekazu
name: Kurita, Nobuyuki
name: Johmoto, Kohei
name: Uekusa, Hidehiro
name: Miyake, Atsushi
name: Tokunaga, Masashi
name: Nishimoto, Satoshi
name: Nakamura, Masaaki
name: Jaime, Marcelo
name: Radtke, Guillaume
name: Saúl, Andrés
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We synthesized single crystals of composition Ba$_2$CuSi$_2$O$_6$Cl$_2$ and investigated its quantum magnetic properties. The crystal structure is closely related to that of the quasi-two-dimensional (2D) dimerized magnet BaCuSi$_2$O$_6$ also known as Han purple. Ba$_2$CuSi$_2$O$_6$Cl$_2$ has a singlet ground state with an excitation gap of $Δ/k_{\rm B}\,{=}\,20.8$ K. The magnetization curves for two different field directions almost perfectly coincide when normalized by the $g$-factor except for a small jump anomaly for a magnetic field perpendicular to the $c$ axis. The magnetization curve with a nonlinear slope above the critical field is in excellent agreement with exact-diagonalization calculations based on a 2D coupled spin-dimer model. Individual exchange constants are also evaluated using density functional theory (DFT). The DFT results demonstrate a 2D exchange network and weak frustration between interdimer exchange interactions, supported by weak spin-lattice coupling implied from our magnetostriction data. The magnetic-field-induced spin ordering in Ba$_2$CuSi$_2$O$_6$Cl$_2$ is described as the quasi-2D Bose-Einstein condensation of triplets.
description: 9 pages, 7 figures, to appear in Phys. Rev. B
Early Cosmology Constrained
Creators: name: Verde, Licia
name: Bellini, Emilio
name: Pigozzo, Cassio
name: Heavens, Alan F.
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate our knowledge of early universe cosmology by exploring how much additional energy density can be placed in different components beyond those in the $Λ$CDM model. To do this we use a method to separate early- and late-universe information enclosed in observational data, thus markedly reducing the model-dependency of the conclusions. We find that the 95\% credibility regions for extra energy components of the early universe at recombination are: non-accelerating additional fluid density parameter $Ω_{\rm MR} < 0.006$ and extra radiation parameterised as extra effective neutrino species $2.3 < N_{\rm eff} < 3.2$ when imposing flatness. Our constraints thus show that even when analyzing the data in this largely model-independent way, the possibility of hiding extra energy components beyond $Λ$CDM in the early universe is seriously constrained by current observations. We also find that the standard ruler, the sound horizon at radiation drag, can be well determined in a way that does not depend on late-time Universe assumptions, but depends strongly on early-time physics and in particular on additional components that behave like radiation. We find that the standard ruler length determined in this way is $r_{\rm s} = 147.4 \pm 0.7$ Mpc if the radiation and neutrino components are standard, but the uncertainty increases by an order of magnitude when non-standard dark radiation components are allowed, to $r_{\rm s} = 150 \pm 5$ Mpc.
description: Submitted to JCAP
English Language Arts 30-1 Reimagined: A Teacher Resource for Incorporating Critical Pedagogy in the Classroom
Creators: Melanie Martine Musaasizi
Publisher: name: University of Alberta Library
Year: 2023

This document serves as a professional resource for 30-1 English Language Arts teachers in Alberta. This resource focuses on incorporating elements of critical pedagogy in the classroom. Through four curated units, this resource offers theoretical and practical tools for weaving themes of social justice, critical thinking, and ethics of care into the classroom. By fostering a dynamic and interactive learning environment, this resource equips educators with the tools to inspire a new generation of well-rounded and perceptive readers and writers.
Coherent perfect absorption in photonic structures
Creators: name: Baldacci, Lorenzo
name: Zanotto, Simone
name: Tredicucci, Alessandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The ability to drive a system with an external input is a fundamental aspect of light-matter interaction. The coherent perfect absorption (CPA) phenomenon extends to the general multibeam interference phenomenology the well known critical coupling concepts. This interferometric control of absorption can be employed to reach full delivery of optical energy to nanoscale systems such as plasmonic nanoparticles, and multi-port interference can be used to enhance the absorption of a nanoscale device when it is embedded in a strongly scattering system, with potential applications to nanoscale sensing. Here we review the two-port CPA in reference to photonic structures which can resonantly couple to the external fields. A revised two-port theory of CPA is illustrated, which relies on the Scattering Matrix formalism and is valid for all linear two-port systems with reciprocity. Through a semiclassical approach, treating two-port critical coupling conditions in a non-perturbative regime, it is demonstrated that the strong coupling regime and the critical coupling condition can indeed coexist; in this situation, termed strong critical coupling, all the incoming energy is converted into polaritons. Experimental results are presented, which clearly display the elliptical trace of absorption as function of input unbalance in a thin metallo-dielectric metamaterial, and verify polaritonic CPA in an intersubband-polariton photonic-crystal membrane resonator. Concluding remarks discuss the future perspectives of CPA with photonic structures.
description: arXiv admin note: substantial text overlap with arXiv:1605.08906
Equivalence of Two Contour Prescriptions in Superstring Perturbation Theory
Creators: name: Sen, Ashoke
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Conventional superstring perturbation theory based on the world-sheet approach gives divergent results for the S-matrix whenever the total center of mass energy of the incoming particles exceeds the threshold of production of any final state consistent with conservation laws. Two systematic approaches have been suggested for dealing with this difficulty. The first one involves deforming the integration cycles over the moduli space of punctured Riemann surfaces into complexified moduli space. The second one treats the amplitude as a sum of superstring field theory Feynman diagrams and deforms the integration contours over loop energies of the Feynman diagram into the complex plane. In this paper we establish the equivalence of the two prescriptions to all orders in perturbation theory. Since the second approach is known to lead to unitary amplitudes, this establishes the consistency of the first prescription with unitarity.
description: LaTeX, 12 pages
European Union Litigation
Creators: name: Esposito, Fabrizio
name: Hacker, Philipp
Publisher: name: Humboldt-Universität zu Berlin
Year: 2019
Subjects: subject: 340 Recht

description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: This article provides an overview of cases decided by the Court of Justice of the European Union concerning contract law. The present issue covers the period between mid-July 2018 and the end of January 2019.
Nanosecond-timescale spin transfer using individual electrons in a quadruple-quantum-dot device
Creators: name: Baart, T. A.
name: Jovanovic, N.
name: Reichl, C.
name: Wegscheider, W.
name: Vandersypen, L. M. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The ability to coherently transport electron-spin states between different sites of gate-defined semiconductor quantum dots is an essential ingredient for a quantum-dot-based quantum computer. Previous shuttles using electrostatic gating were too slow to move an electron within the spin dephasing time across an array. Here we report a nanosecond-timescale spin transfer of individual electrons across a quadruple-quantum-dot device. Utilizing enhanced relaxation rates at a so-called `hot spot', we can upper bound the shuttle time to at most 150 ns. While actual shuttle times are likely shorter, 150 ns is already fast enough to preserve spin coherence in e.g. silicon based quantum dots. This work therefore realizes an important prerequisite for coherent spin transfer in quantum dot arrays.
description: 7 pages including 2 pages of supplementary material