cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Self-Calibrating, Fully Differentiable NLOS Inverse Rendering
Creators: name: Choi, Kiseok
name: Kim, Inchul
name: Choi, Dongyoung
name: Marco, Julio
name: Gutierrez, Diego
name: Kim, Min H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Existing time-resolved non-line-of-sight (NLOS) imaging methods reconstruct hidden scenes by inverting the optical paths of indirect illumination measured at visible relay surfaces. These methods are prone to reconstruction artifacts due to inversion ambiguities and capture noise, which are typically mitigated through the manual selection of filtering functions and parameters. We introduce a fully-differentiable end-to-end NLOS inverse rendering pipeline that self-calibrates the imaging parameters during the reconstruction of hidden scenes, using as input only the measured illumination while working both in the time and frequency domains. Our pipeline extracts a geometric representation of the hidden scene from NLOS volumetric intensities and estimates the time-resolved illumination at the relay wall produced by such geometric information using differentiable transient rendering. We then use gradient descent to optimize imaging parameters by minimizing the error between our simulated time-resolved illumination and the measured illumination. Our end-to-end differentiable pipeline couples diffraction-based volumetric NLOS reconstruction with path-space light transport and a simple ray marching technique to extract detailed, dense sets of surface points and normals of hidden scenes. We demonstrate the robustness of our method to consistently reconstruct geometry and albedo, even under significant noise levels.
Nachruf auf P. Albert-Marie Besnard
Creators: name: Duquoc, Christian
name: Floristán Samanes, Casiano
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 14 Nr. 11 (1978): Concilium: Internationale Zeitschrift für Theologie, Band 14, Heft 11
Local and global dynamics in polypropylene glycol / silica composites
Creators: name: Casalini, R.
name: Roland, C. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The local segmental and global dynamics of a series of polypropylene glycol / silica nanocomposites were studied using rheometry and mechanical and dielectric spectroscopies. The particles cause substantial changes in the rheology, including higher viscosities that become non-Newtonian and the appearance of stress overshoots in the transient shear viscosity. However, no change was observed in the mean relaxation times for either the segmental or normal mode dynamics measured dielectrically. This absence of an effect of the particles is due to masking of the interfacial response by polymer chains remote from the particles. When the unattached polymer was extracted to isolate the interfacial material, very large reductions in the relaxation times were measured. This speeding up of the dynamics is due in part to the reduced density at the interface, presumably a consequence of poorer packing of tethered chains. In addition, binding of the ether oxygens of the polypropylene glycol chains truncates the normal mode, which shifts the corresponding relaxation peak to higher frequencies.
description: 6 figures
UV to IR Luminosities and Dust Attenuation Determined from ~4000 K-Selected Galaxies at 1
Creators: name: Forrest, Ben
name: Tran, Kim-Vy H.
name: Tomczak, Adam R.
name: Broussard, Adam
name: Labbé, Ivo
name: Papovich, Casey
name: Kriek, Mariska
name: Allen, Rebecca J.
name: Cowley, Michael
name: Dickinson, Mark
name: Glazebrook, Karl
name: van Houdt, Josha
name: Inami, Hanae
name: Kacprzak, Glenn G.
name: Kawinwanichakij, Lalitwadee
name: Kelson, Daniel
name: McCarthy, Patrick J.
name: Monson, Andrew
name: Morrison, Glenn
name: Nanayakkara, Themiya
name: Persson, S. Eric
name: Quadri, Ryan F.
name: Spitler, Lee R.
name: Straatman, Caroline
name: Tilvi, Vithal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We build a set of composite galaxy SEDs by de-redshifting and scaling multi-wavelength photometry from galaxies in the ZFOURGE survey, covering the CDFS, COSMOS, and UDS fields. From a sample of ~4000 K_s-band selected galaxies, we define 38 composite galaxy SEDs that yield continuous low-resolution spectra (R~45) over the rest-frame range 0.1-4 um. Additionally, we include far infrared photometry from the Spitzer Space Telescope and the Herschel Space Observatory to characterize the infrared properties of our diverse set of composite SEDs. From these composite SEDs we analyze the rest-frame UVJ colors, as well as the ratio of IR to UV light (IRX) and the UV slope ($β$) in the IRX$-β$ dust relation at 1
description: 6 pages, 4 figures. Accepted for publication in ApJ Letters
Evidence of the stability of Mo_{2}TiAlC_{2} from first principles calculations and its thermodynamical and optical properties
Creators: name: Gao, Qinghe
name: Xu, Zhijun
name: Tang, Ling
name: Zuo, Xianjun
name: Jia, Guozhu
name: Du, An
name: Linghu, Rongfeng
name: Guo, Yundong
name: Yang, Zejin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The elastic, thermodynamic, and optical properties of Mo_{2}TiAlC_{2} are investigated by first-principles calculations. Our results indicate that the a axis is stiffer than c axis within 0~100 GPa. Elastic constants calculations predict the large stability range of Mo_{2}TiAlC_{2} under pressure. Several important thermodynamic properties are discussed detailedly, including the Debye temperature, thermal expansion coefficient, and heat capacity etc. The bonding properties are studied from the elastic quantities and electronic properties. The electronic properties are investigated, including the energy band structure, density of states, and so on. The evidence of the instability of Mo_{3}AlC_{2} and stability of Mo_{2}TiAlC_{2} are successfully obtained.
Two-dimensional spin-imbalanced Fermi gases at non-zero temperature: Phase separation of a non-condensate
Creators: name: Wu, Chien-Te
name: Anderson, Brandon M.
name: Boyack, Rufus
name: Levin, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study a trapped two-dimensional spin-imbalanced Fermi gas over a range of temperatures. In the moderate temperature regime, associated with current experiments, we find reasonable semi-quantitative agreement with the measured density profiles as functions of varying spin imbalance and interaction strength. Our calculations show that, in contrast to the three-dimensional case, the phase separation which appears as a spin balanced core, can be associated with non-condensed fermion pairs. We present predictions at lower temperatures where a quasi-condensate will first appear, based on the pair momentum distribution and following the protocols of Jochim and collaborators. While these profiles also indicate phase separation, they exhibit distinctive features which may aid in identifying the condensation regime.
description: 4 pages, 4 figure
An insight on possible toxicity mechanism of fibrous erionite
Creators: name: Di Carlo, Maria Cristina
name: Ballirano, Paolo
name: Montereali, Maria Rita
name: Caprioli, Raffaella
name: Nardi, Elisa
name: Pacella, Alessandro
Publisher: name: Periodico di Mineralogia
Year: 2023

description: Inhalation of erionite fibres is associated with endemic lung and pleural diseases. However, the mechanisms by which erionite exerts its toxic activity are not fully understood. Recently, it has been shown that erionite fibres are too short to undergo frustrated phagocytosis. On this basis, the role of phagocytosis in the acute toxicity of these fibres is supposed to be limited. Instead, it has been proposed that erionite, after phagocytosis, may activate a rapid cation exchange with cytosolic potassium, leading to the alteration of ion homeostasis and cellular injury. Furthermore, it has been hypothesised that engulfed erionite fibres may reduce cytosolic Ca2+ levels and interfere with the cross-talk between the endoplasmic reticulum and mitochondria, resulting in the failure of cellular apoptosis. In this work, erionite fibres were incubated first in a solution mimicking extra-cellular lung fluid and then in another one simulating intra-cellular cytosol. Our goal was to gain further insights into the proposed mechanisms of acute cytotoxicity of erionite, in particular: i) to simulate possible K+ binding by erionite through cation exchange after phagocytosis, and ii) to assess its potential absorption of cytosolic Ca. The ions released into the solutions were quantified by inductively coupled plasma optical emission spectroscopy. Pristine and incubated fibres were analysed by scanning electron microscopy equipped with an energy dispersive spectroscopy system and X-ray powder diffraction (Rietveld method). Results support the hypothesis that erionite can bind cytosolic K ions through a rapid cation exchange process, mainly with Na ions previously bound in the extra-cellular environment. However, our findings seem to rule out the ability of phagocytized erionite fibres to decrease cytosolic Ca2+ levels and, consequently, to interfere with the endoplasmic reticulum-mitochondria cross-talk that regulates cell apoptosis.
description: Periodico di Mineralogia, Vol. 92 No. 2 (2023)
Tackling Feynman integrals with quantum minimization algorithms
Creators: name: Sborlini, German F. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: One of the most severe bottlenecks to reach high-precision predictions in QFT is the calculation of multiloop multileg Feynman integrals. Several new strategies have been proposed in the last years, allowing impressive results with deep implications in particle physics. Still, the efficiency of such techniques starts to drastically decrease when including many loops and legs. In this talk, we explore the implementation of quantum algorithms to optimize the integrands of scattering amplitudes. We rely on the manifestly causal loop-tree duality, which translates the loop into phase-space integrals and avoids the spurious singularities due to non-causal effects. Then, we built a Hamiltonian codifying causal-compatible contributions and minimize it using a Variational Quantum Eigensolver. Our very promising results point towards a potential speed-up for achieving a more numerically-stable representation of Feynman integrals by using quantum computers.
description: 6 pages, 1 figure. Contribution to the Proceedings of the EPS-HEP 2023 Conference. v2: Updated references
Spin-dependent fragmentation functions of Gluon splitting into heavy quarkonia considering three different scenarios
Creators: name: Nejad, S. Mohammad Moosavi
name: Delpasand, Mahdi
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Heavy quarkonium production is a powerful implement to study the strong interaction dynamics and QCD theory. Fragmentation is the dominant production mechanism for heavy quarkonia with large transverse momentum. With the large heavy quark mass, the relative motion of the heavy quark pair inside a heavy quarkonium is effectively nonrelativistic and it is also well-known that their fragmentation functions can be calculated in the perturbative QCD framework. Here, we analytically calculate the process-independent fragmentation functions for a gluon to split into the spin-singlet and -triplet $S$-wave heavy quarkonia using three different scenarios. We will show that the fragmentation probability of the gluon into the spin-triplet bound-state is the biggest one.
description: 16 pages, 6 figures. arXiv admin note: text overlap with arXiv:1506.08861
Reconstructing Merger Timelines Using Star Cluster Age Distributions: the Case of MCG+08-11-002
Creators: name: Davies, Rebecca L.
name: Medling, Anne M.
name: U, Vivian
name: Max, Claire E.
name: Sanders, David
name: Kewley, Lisa. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present near infrared imaging and integral field spectroscopy of the centre of the dusty luminous infrared galaxy merger MCG+08-11-002, taken using the Near InfraRed Camera 2 (NIRC2) and the OH-Suppressing InfraRed Imaging Spectrograph (OSIRIS) on Keck II. We achieve a spatial resolution of ~25 pc in the K band, allowing us to resolve 41 star clusters in the NIRC2 images. We calculate the ages of 22/25 star clusters within the OSIRIS field using the equivalent widths of the CO 2.3$μ$m absorption feature and the Br$γ$ nebular emission line. The star cluster age distribution has a clear peak at ages < 20 Myr, indicative of current starburst activity associated with the final coalescence of the progenitor galaxies. There is a possible second peak at ~65 Myr which may be a product of the previous close passage of the galaxy nuclei. We fit single and double starburst models to the star cluster age distribution and use Monte Carlo sampling combined with two-sided K-S tests to calculate the probability that the observed data are drawn from each of the best fit distributions. There is a >90 per cent chance that the data are drawn from either a single or double starburst star formation history, but stochastic sampling prevents us from distinguishing between the two scenarios. Our analysis of MCG+08-11-002 indicates that star cluster age distributions provide valuable insights into the timelines of galaxy interactions and may therefore play an important role in the future development of precise merger stage classification systems.
description: 17 pages, 10 figures, accepted for publication in MNRAS
Polygamy relation of quantum correlations with equality
Creators: name: Jin, Zhi-Xiang
name: Yu, Bing
name: Zhu, Xue-Na
name: Fei, Shao-Ming
name: Qiao, Cong-Feng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide a generalized definition of polygamy relations for any quantum correlation measures. Instead of the usual polygamy inequality, a polygamy relation with equality is given by introducing the polygamy weight. From the polygamy relation with equality, we present polygamy inequalities satisfied by the $β$th $(β>0)$ power of the quantum correlation measures. Taking concurrence of assistance as an example, we further illustrate the significance and advantages of these relations. We also obtain a polygamy relation with equality by considering the one-to-group entanglements for any quantum entanglement measures that do not satisfy the polygamy relations. We demonstrate that such relations for tripartite states can be generalized to multipartite systems.
Transport equation for plasmas in a stationary-homogeneous turbulence
Creators: name: Wang, Shaojie
Publisher: name: arXiv
Year: 2015
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: For a plasma in a stationary homogeneous turbulence, the Fokker-Planck equation is derived from the nonlinear Vlasov equation by introducing the entropy principle. The ensemble average in evaluating the kinetic diffusion tensor, whose symmetry has been proved, can be computed in a straightforward way when the fluctuating particle trajectories are provided. As an application, it has been shown that a mean electric filed can drive a particle flux through the Stokes-Einstein relation, independent of the details of turbulence.
Further improvement of medium temperature heat treated SRF cavities for high gradients
Creators: name: Steder, Lea
name: Bate, C.
name: Kasprzak, K.
name: Reschke, D.
name: Trelle, L.
name: Weise, Hans
name: Wiencek, M.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2024

description: The application of heat treatments on 1.3 GHz TESLA type cavities in ultra-high vacuum at 250{\deg}C to 350{\deg}C is called medium temperature or mid-T heat treatment. In various laboratories such treatments on superconducting radio frequency (SRF) cavities result reproducible in three main characteristic features for the quality factor $Q_0$ in dependency of the accelerating electric field strength $E_{acc}$. First, comparing mid-T heat treatment with a baseline treatment, a significant increase of $Q_0$ up to $5\cdot10^{10}$ at 2K can be observed. Second, with increasing accelerating gradient $E_{acc}$ the $Q_0$ increases up to a maximum around 16 to 20 MV/m. This effect is known as anti-Q-slope. The third observation for a mid-T heat treatment compared to a baseline treatment is an often reduced maximum gradient $E_{acc}$. The appearance of a high-field-Q-slope (HFQS) was reported after mid-T heat treatments of 3 hours at 350{\deg}C or of 20 hours at 300{\deg}C at DESY. Using the heating temperature and the heating time taken from the temperature profile of the furnace effective oxygen diffusion lengths $l$ were calculated. In the follow-up study presented here, a set of three single-cell cavities with diffusion lengths $l$ above 1700 nm, showing HFQS, were treated with an additional so-called low-T bake of 24-48 hours at 120{\deg}C to 130{\deg}C. The subsequent reproducible Q(E) -performances results indicate that the low-T bake procedure cures the HFQS like for cavities treated with the EuXFEL recipe of EP and following low-T treatments. As presented in the following, Q values of more than $3\cdot10^{10}$ at 16 MV/m and accelerating gradients of 32 to 40 MV/m are achieved.
Universal behavior of the BEC critical temperature for a multislab ideal Bose gas
Creators: name: Rodríguez, O. A.
name: Solís, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: For an ideal Bose-gas within a multi-slab periodic structure, we discuss the effect of the spatial distribution of the gas on its Bose-Einstein condensation critical temperature $T_c$, as well as on the origin of its dimensional crossover observed in the specific heat. The multi-slabs structure is generated by applying a Kronig-Penney potential to the gas in the perpendicular direction to the slabs of width $b$ and separated by a distance $a$, and allowing the particles to move freely in the other two directions. We found that $T_c$ decreases continuously as the potential barrier height increases, becoming inversely proportional to the square root of the barrier height when it is large enough. This behavior is {\it universal} as it is independent of the width and spacing of the barriers. The specific heat at constant volume shows a crossover from 3D to 2D when the height of the potential or the barrier width increase, in addition to the well known peak related to the Bose-Einstein condensation. These features are due to the trapping of the bosons by the potential barriers, and can be characterized by the energy difference between the energy bands below the potential height.
description: 8 pages with four figures
Monsters in the Dark: Predictions for Luminous Galaxies in the Early Universe from the BlueTides Simulation
Creators: name: Waters, Dacen
name: Wilkins, Stephen
name: Di Matteo, Tiziana
name: Feng, Yu
name: Croft, Ruper
name: Nagai, Daisuke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using deep Hubble and Spitzer observations Oesch et al. (2016) have identified a bright ($M_{\rm UV}\approx -22$) star forming galaxy candidate at $z \approx 11$. The presence of GN-$z11$ implies a number density $\sim 10^{-6}\,{\rm Mpc^{-3}}$, roughly an order of magnitude higher than the expected value based on extrapolations from lower redshift. Using the unprecedented volume and high resolution of the BlueTides cosmological hydrodynamical simulation, we study the population of luminous rare objects at $z > 10$. The luminosity function in BlueTides implies an enhanced number of massive galaxies, consistent with the observation of GN-$z11$. We find about 30 galaxies at $M_{\rm UV}\approx -22$ at $z = 11$ in the BlueTides volume, including a few objects about 1.5 magnitudes brighter. The probability of observing GN-$z11$ in the volume probed by Oesch et al. (2016) is $\sim 13$ per cent. The predicted properties of the rare bright galaxies at $z = 11$ in BlueTides closely match those inferred from the observations of GN-$z11$. BlueTides predicts a negligible contribution from faint AGN in the observed SED. The enormous increase in volume surveyed by WFIRST will provide observations of $\sim1000$ galaxies with $M_{\rm UV} < -22$ beyond $z = 11$ out to $z = 13.5$.
description: 5 pages, 7 figures
The dust scattering component of X-ray extinction: Effects on continuum fitting and high-resolution absorption edge structure
Creators: name: Corrales, L.
name: Garcia, J.
name: Wilms, J.
name: Baganoff, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Small angle scattering by dust grains causes a significant contribution to the total interstellar extinction for any X-ray instrument with sub-arcminute resolution (Chandra, Swift, XMM-Newton). However, the dust scattering component is not included in the current absorption models: phabs, tbabs, and tbnew. We simulate a large number of Chandra spectra to explore the bias in the spectral fit and NH measurements obtained without including extinction from dust scattering. We find that without incorporating dust scattering, the measured NH will be too large by a baseline level of 25%. This effect is modulated by the imaging resolution of the telescope, because some amount of unresolved scattered light will be captured within the aperture used to extract point source information. In high resolution spectroscopy, dust scattering significantly enhances the total extinction optical depth and the shape of the photoelectric absorption edges. We focus in particular on the Fe-L edge at 0.7 keV, showing that the total extinction template fits well to the high resolution spectrum of three X-ray binaries from the Chandra archive: GX 9+9, XTE J1817-330, and Cyg X-1. In cases where dust is intrinsic to the source, a covering factor based on the angular extent of the dusty material must be applied to the extinction curve, regardless of angular imaging resolution. This approach will be particularly relevant for dust in quasar absorption line systems and might constrain clump sizes in active galactic nuclei.
description: submitted to MNRAS, first revision complete
Interaction of the Cosmic Dark Fluid with Dynamic Aether: Parametric Mechanism of Axion Generation in the Early Universe
Creators: name: Balakin, Alexander B.
name: Ilin, Alexei S.
name: Shakirzyanov, Amir F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider an isotropic homogeneous cosmological model with five interacting elements: first, the dynamic aether presented by a unit timelike vector field, second, the pseudoscalar field describing an axionic component of the dark matter, third, the cosmic dark energy, described by a rheologic fluid, fourth, the non-axionic dark matter coupled to the dark energy, fifth, the gravity field. We show that the early evolution of the Universe described by this model can include two specific epochs: the first one can be characterized as a super-inflation, the second epoch is associated with an oscillatory regime. The dynamic aether carries out a regulatory mission; the rheologic dark fluid provides the specific features of the spacetime evolution. The oscillations of the scale factor and of the Hubble function are shown to switch on the parametric (Floquet - type) mechanism of the axion number growth.
description: 21 pages, 4 figures, accepted for publication in Symmetry, Special Issue: Fundamental Aspects of Theoretical Physics - Memorial Issue for Prof. Dr. Weinberg
Time series analysis of temporal networks
Creators: name: Sikdar, Sandipan
name: Ganguly, Niloy
name: Mukherjee, Animesh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: An important feature of all real-world networks is that the network structure changes over time. Due to this dynamic nature, it becomes difficult to propose suitable growth models that can explain the various important characteristic properties of these networks. In fact, in many application oriented studies only knowing these properties is sufficient. We, in this paper show that even if the network structure at a future time point is not available one can still manage to estimate its properties. We propose a novel method to map a temporal network to a set of time series instances, analyze them and using a standard forecast model of time series, try to predict the properties of a temporal network at a later time instance. We mainly focus on the temporal network of human face- to-face contacts and observe that it represents a stochastic process with memory that can be modeled as ARIMA. We use cross validation techniques to find the percentage accuracy of our predictions. An important observation is that the frequency domain properties of the time series obtained from spectrogram analysis could be used to refine the prediction framework by identifying beforehand the cases where the error in prediction is likely to be high. This leads to an improvement of 7.96% (for error level <= 20%) in prediction accuracy on an average across all datasets. As an application we show how such prediction scheme can be used to launch targeted attacks on temporal networks.
Hybrid tip-enhanced nano-spectroscopy and -imaging of monolayer WSe2 with local strain control
Creators: name: Park, Kyoung-Duck
name: Khatib, Omar
name: Kravtsov, Vasily
name: Clark, Genevieve
name: Xu, Xiaodong
name: Raschke, Markus B.
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: Many classes of two-dimensional (2D) materials have emerged as potential platforms for novel electronic and optical devices. However, the physical properties are strongly influenced by nanoscale heterogeneities in the form of edges, grain boundaries, and nucleation sites. Using combined tip-enhanced Raman scattering (TERS) and photoluminescence (TEPL) nano-spectroscopy and -imaging, we study the associated effects on the excitonic properties in monolayer WSe2 grown by physical vapor deposition (PVD). With <15 nm spatial resolution we resolve nonlocal nanoscale correlations of PL spectral intensity and shifts with crystal edges and internal twin boundaries associated with the expected exciton diffusion length. Through an active atomic force tip interaction we can control the crystal strain on the nanoscale, and tune the local bandgap in reversible (up to 24 meV shift) and irreversible (up to 48 meV shift) fashion. This allows us to distinguish the effect of strain from the dominant influence of defects on the PL modification at the different structural heterogeneities. Hybrid nano-optical and nano-mechanical imaging and spectroscopy thus enables the systematic study of the coupling of structural and mechanical degrees of freedom to the nanoscale electronic and optical properties in layered 2D materials.
A direct approach to quantum tunneling
Creators: name: Andreassen, Anders
name: Farhi, David
name: Frost, William
name: Schwartz, Matthew D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The decay rates of quasistable states in quantum field theories are usually calculated using instanton methods. Standard derivations of these methods rely in a crucial way upon deformations and analytic continuations of the physical potential, and on the saddle point approximation. While the resulting procedure can be checked against other semi-classical approaches in some one-dimensional cases, it is challenging to trace the role of the relevant physical scales, and any intuitive handle on the precision of the approximations involved are at best obscure. In this paper, we use a physical definition of the tunneling probability to derive a formula for the decay rate in both quantum mechanics and quantum field theory directly from the Minkowski path integral, without reference to unphysical deformations of the potential. There are numerous benefits to this approach, from non-perturbative applications to precision calculations and aesthetic simplicity.
description: 5 pages, 2 figures
Searching for a magnetic field in Wolf-Rayet stars using FORS2 spectropolarimetry
Creators: name: Hubrig, S.
name: Scholz, K.
name: Hamann, W. -R.
name: Schoeller, M.
name: Ignace, R.
name: Ilyin, I.
name: Gayley, K. G.
name: Oskinova, L. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To investigate if magnetic fields are present in Wolf-Rayet stars, we selected a few stars in the Galaxy and one in the Large Magellanic Cloud (LMC). We acquired low-resolution spectropolarimetric observations with the ESO FORS2 instrument during two different observing runs. During the first run in visitor mode, we observed the LMC Wolf-Rayet star BAT99 7 and the stars WR6, WR7, WR18, and WR23 in our Galaxy. The second run in service mode was focused on monitoring the star WR6. Linear polarization was recorded immediately after the observations of circular polarization. During our visitor observing run, the magnetic field for the cyclically variable star WR6 was measured at a significance level of 3.3sigma ( = 258+-78G). Among the other targets, the highest value for the longitudinal magnetic field, = 327+-141G, was measured in the LMC star BAT99 7. Spectropolarimetric monitoring of the star WR6 revealed a sinusoidal nature of the variations with the known rotation period of 3.77d, significantly adding to the confidence in the detection. The presence of the rotation-modulated magnetic variability is also indicated in our frequency periodogram. The reported field magnitude suffers from significant systematic uncertainties at the factor 2 level, in addition to the quoted statistical uncertainties, owing to the theoretical approach used to characterize it. Linear polarization measurements showed no line effect in the stars, apart from WR6. BAT99 7, WR7, and WR,23 do not show variability of the linear polarization over two nights.
description: 14 pages, 6 tables, 14 figures, accepted for publication in MNRAS
Split Chern-Simons theory in the BV-BFV formalism
Creators: name: Cattaneo, Alberto S.
name: Mnev, Pavel
name: Wernli, Konstantin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The goal of this note is to give a brief overview of the BV-BFV formalism developed by the first two authors and Reshetikhin in [arXiv:1201.0290], [arXiv:1507.01221] in order to perform perturbative quantisation of Lagrangian field theories on manifolds with boundary, and present a special case of Chern-Simons theory as a new example.
description: 19 pages, 2 figures. Based on the contribution presented at "Geometric, Algebraic and Topological Methods for Quantum Field Theory", July 20-31, Villa de Leyva, Colombia v2: First author's name changed to include middle name
Two-step melting of three-sublattice order in $S=1$ easy-axis triangular lattice antiferromagnets
Creators: name: Heidarian, Dariush
name: Damle, Kedar
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider $S=1$ triangular lattice Heisenberg antiferromagnets with a strong single-ion anisotropy $D$ that dominates over the nearest-neighbour antiferromagnetic exchange $J$. In this limit of small $J/D$, we study low temperature ($T \sim J \ll D$) properties of such magnets by employing a low-energy description in terms of hard-core bosons with nearest neighbour repulsion $V \approx 4J + J^2/D$ and nearest neighbour unfrustrated hopping $t \approx J^2/2D$. Using a cluster Stochastic Series Expansion (SSE) algorithm to perform sign-problem-free quantum Monte Carlo (QMC) simulations of this effective model, we establish that the ground-state three-sublattice order of the easy-axis spin-density $S^z(\vec{r})$ melts in zero field ($B=0$) in a {\em two-step} manner via an intermediate temperature phase characterized by power-law three-sublattice order with a temperature dependent exponent $η(T) \in [\frac{1}{9}, \frac{1}{4}]$. For $η(T) < \frac{2}{9}$ in this phase, we find that the uniform easy-axis susceptibility of an $L \times L$ sample diverges as $χ_L \sim L^{2-9 η}$ at $B=0$, consistent with a recent prediction that the thermodynamic susceptibility to a uniform field $B$ along the easy axis diverges at small $B$ as $χ_{\rm easy-axis}(B) \sim B^{-\frac{4-18η}{4-9η}}$ in this regime.
description: 7 pages; two-column format; 8 figures
The SLUGGS Survey: globular clusters and the dark matter content of early-type galaxies
Creators: name: Forbes, Duncan A.
name: Alabi, Adebusola
name: Romanowsky, Aaron J.
name: Brodie, Jean P.
name: Strader, Jay
name: Usher, Christopher
name: Pota, Vincenzo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A strong correlation exists between the total mass of a globular cluster (GC) system and the virial halo mass of the host galaxy. However, the total halo mass in this correlation is a statistical measure conducted on spatial scales that are some ten times that of a typical GC system. Here we investigate the connection between GC systems and galaxy's dark matter on comparable spatial scales, using dynamical masses measured on a galaxy-by-galaxy basis. Our sample consists of 17 well-studied massive (stellar mass $\sim$10$^{11}$ M$_{\odot}$) early-type galaxies from the SLUGGS survey. We find the strongest correlation to be that of the blue (metal-poor) GC subpopulation and the dark matter content. This correlation implies that the dark matter mass of a galaxy can be estimated to within a factor of two from careful imaging of its GC system. The ratio of the GC system mass to that of the enclosed dark matter is nearly constant. We also find a strong correlation between the fraction of blue GCs and the fraction of enclosed dark matter, so that a typical galaxy with a blue GC fraction of 60 per cent has a dark matter fraction of 86 per cent over similar spatial scales. Both halo growth and removal (via tidal stripping) may play some role in shaping this trend. In the context of the two-phase model for galaxy formation, we find galaxies with the highest fractions of accreted stars to have higher dark matter fractions for a given fraction of blue GCs.
description: 6 pages, 3 figures, MNRAS in press
Weak and Strong Solutions to the Inverse-Square Brachistochrone Problem on Circular and Annular Domains
Creators: name: Grimm, Christopher
name: Gemmer, John A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper we study the brachistochrone problem in an inverse-square gravitational field on the unit disk. We show that the time optimal solutions consist of either smooth strong solutions to the Euler-Lagrange equation or weak solutions formed by appropriately patched together strong solutions. This combination of weak and strong solutions completely foliates the unit disk. We also consider the problem on annular domains and show that the time optimal paths foliate the annulus. These foliations on the annular domains converge to the foliation on the unit disk in the limit of vanishing inner radius.
Litocampa drescoi
Creators: name: Sendra, Alberto
name: Reboleira, Ana Sofia P. S.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplura
Campodeidae
Litocampa
Litocampa drescoi

description: Litocampa drescoi (Condé, 1949)
Plusiocampa drescoi Condé, 1949: 572, fig. 2b.
Litocampa drescoi – Paclt 1957: 26.
Diagnosis (Condé 1949c; Condé & Mathieu 1957; Sendra 1988)
Body length 3.0–5.0 mm; thick, smooth clothing setae; antennae with 29–36 antennomeres; sensillum of third antennomere in ventral position; cupuliform organ with 6–11 complex olfactory chemoreceptors; 1+1 ma, 1+1 la, 1+1 lp macrosetae on pronotum and mesonotum and 1+1 ma, 1+1 lp on metanotum; long, barbed notal macrosetae; long with distal barbs notal marginal setae; one dorsal femoral macrosetae; calcars barbed one side along their length; one ventral tibial macroseta; smooth subapical tarsal setae; subequal grooved elbow-like claws with small smooth lateral crests, smooth setiform telotarsal processes; 1+1 ma macrosetae on I–VII urotergites, 2+2 lp on V–VII urotergites, 1+1 ma, 3+3 lp on VIII urotergite and 1+1 mp, 5+5 lp on IX abdominal segment; male with glandular g 1 -setae, subcylindrical enlarged appendages without glandular a
2
-setae.
Habitat and distribution
Cave-dwelling species that has also been found in the MSS of scree slopes at high altitude (Condé & Mathieu 1957). It is distributed throughout caves in the centre of the Pyrenees spreading at low altitudes at both sides of the mountain range (Condé 1949c; Sendra & Escolà 2004).
description: Published as part of Sendra, Alberto & Reboleira, Ana Sofia P. S., 2020, Euro-Mediterranean fauna of Campodeinae (Campodeidae, Diplura), pp. 1-130 in European Journal of Taxonomy 728 on page 99, DOI: 10.5852/ejt.2020.728.1181, http://zenodo.org/record/4316883
A post-selection algorithm for improving dynamic ensemble selection methods
Creators: name: Cordeiro, Paulo R. G.
name: Cavalcanti, George D. C.
name: Cruz, Rafael M. O.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Dynamic Ensemble Selection (DES) is a Multiple Classifier Systems (MCS) approach that aims to select an ensemble for each query sample during the selection phase. Even with the proposal of several DES approaches, no particular DES technique is the best choice for different problems. Thus, we hypothesize that selecting the best DES approach per query instance can lead to better accuracy. To evaluate this idea, we introduce the Post-Selection Dynamic Ensemble Selection (PS-DES) approach, a post-selection scheme that evaluates ensembles selected by several DES techniques using different metrics. Experimental results show that using accuracy as a metric to select the ensembles, PS-DES performs better than individual DES techniques. PS-DES source code is available in a GitHub repository
Epigenetic alteration of the cancer-related gene TGFBI in B cells infected with Epstein–Barr virus and exposed to aflatoxin B1: potential role in Burkitt lymphoma development
Creators: name: Manara, Francesca
name: Jay, Antonin
name: Odongo, Grace Akinyi
name: Mure, Fabrice
name: Ali Maroui, Mohamed
name: Diederichs, Audrey
name: Sirand, Cecilia
name: Cuenin, Cyrille
name: Granai, Massimo
name: Mundo, Lucia
name: Hernandez-Vargas, Hector
name: Lazzi, Stefano
name: Khoueiry, Rita
name: Gruffat, Henri
name: Herceg, Zdenko
name: Accardi, Rosita
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Health sciences
subject: FOS: Health sciences

description: Burkitt lymphoma (BL) is a malignant B cell neoplasm that accounts for almost half of pediatric cancers in sub-Saharan African countries. Although the BL endemic prevalence is attributable to the combination of Epstein–Barr virus (EBV) infection with malaria and environmental carcinogens exposure, such as the food contaminant aflatoxin B1 (AFB1), the molecular determinants underlying the pathogenesis are not fully understood. Consistent with the role of epigenetic mechanisms at the interface between the genome and environment, AFB1 and EBV impact the methylome of respectively leukocytes and B cells specifically. Here, we conducted a thorough investigation of common epigenomic changes following EBV or AFB1 exposure in B cells. Genome-wide DNA methylation profiling identified an EBV–AFB1 common signature within the TGFBI locus, which encodes for a putative tumor suppressor often altered in cancer. Subsequent mechanistic analyses confirmed a DNA-methylation-dependent transcriptional silencing of TGFBI involving the recruitment of DNMT1 methyltransferase that is associated with an activation of the NF-κB pathway. Our results reveal a potential common mechanism of B cell transformation shared by the main risk factors of endemic BL (EBV and AFB1), suggesting a key determinant of disease that could allow the development of moreefficient targeted therapeutic strategies.
D3.2 0D model
Creators: name: Bartocci, Pietro
name: Abad, Alberto
name: Cabello, Arturo
name: De Las Obras Loscertales, Margarita
Publisher: name: Zenodo
Year: 2023
Subjects: Pressurised Chemical Looping, Fluidised Beds

description: This work intends to evaluate whether an increase in the operating pressure may improve the behavior of this material, taking into account the ilmenite kinetic parameters together with the fluid dynamics of the system. In addition, the evaluation of pressurized CLC for the energy use of natural gas is herein proposed considering the dual circulating fluidized bed reactor (DCFB) configuration and internally circulating fluidized bed reactor (ICR), in which the fuel reactor would be a fluidized bed reactor in the turbulent or bubbling regime, respectively.
Is the Past, Past? Exploring the Influence of Colonialism on Race and Inequality in Malaysia
Creators: name: CHONG, KRISTY CHING YEE
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 520505
subject: Social psychology

description: While there is growing attention on race and racism, we often overlook how ideas from the colonial era still affect how we think and act. In this thesis, I aimed to understand how these ideas shape our beliefs and contribute to inequality. The first study showed that views on resource distribution and feelings about one’s racial identity influenced how much group-based inequalities are seen as fair. The second study explored how racial inequality is maintained across generations through a cultural process. Overall, these findings show the importance of sociohistorical and cultural processes in studies that examine inequality in postcolonial societies.
Approximate Relational Hoare Logic for Continuous Random Samplings
Creators: name: Sato, Tetsuya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Approximate relational Hoare logic (apRHL) is a logic for formal verification of the differential privacy of databases written in the programming language pWHILE. Strictly speaking, however, this logic deals only with discrete random samplings. In this paper, we define the graded relational lifting of the subprobabilistic variant of Giry monad, which described differential privacy. We extend the logic apRHL with this graded lifting to deal with continuous random samplings. We give a generic method to give proof rules of apRHL for continuous random samplings.
The Effect of Geometrical and Fluid Kinematic Parameters of a Microfluidic Platform on the Droplet Generation.
Creators: name: Chimerad, Mohammadreza
name: Pishbin, Esmail
name: Asiaei, Sasan
Publisher: name: figshare
Year: 2022
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: The formation of droplets includes a wide range of sciences and researches Due to its expanded application in various industries and tools. The droplets forms the basis of many applications including: the fabrication and combination of new materials, the formulation of products for pharmaceutical use, cosmetics, and food industries. In this study, to produce these particles, a microfluidic device with flow focusing geometry has been used. Furthermore, the influence of some factors such as flow rate ratio, capillary number, and interfacial tension between two emulsions, channel diameter variation and channel angle variation on the physical process of formation and creation of droplets have been investigated.
New Lessons from the HI Size-Mass Relation of Galaxies
Creators: name: Wang, Jing
name: Koribalski, Bärbel S.
name: Serra, Paolo
name: van der Hulst, Thijs
name: Roychowdhury, Sambit
name: Kamphuis, Peter
name: Chengalur, Jayaram N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We revisit the HI size-mass (D$_{\rm HI}$-M$_{\rm HI}$) relation of galaxies with a sample of more than 500 nearby galaxies covering over five orders of magnitude in HI mass and more than ten $B$-band magnitudes. The relation is remarkably tight with a scatter $σ\sim$0.06 dex, or 14%. The scatter does not change as a function of galaxy luminosity, HI richness or morphological type. The relation is linked to the fact that dwarf and spiral galaxies have a homogenous radial profile of HI surface density in the outer regions when the radius is normalised by D$_{\rm HI}$. The early-type disk galaxies typically have shallower HI radial profiles, indicating a different gas accretion history. We argue that the process of atomic-to-molecular gas conversion or star formation cannot explain the tightness of the D$_{\rm HI}$-M$_{\rm HI}$ relation. This simple relation puts strong constraints on simulation models for galaxy formation.
description: 9 pages, 6 figures, accepted for publication at MNRAS
Investigating Factors Associated With Attention Outcomes For Children Born Preterm
Creators: name: BROWN, REBECCA NATASHA
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 321501
subject: Foetal development and medicine
classificationCode: 520404
subject: Memory and attention
classificationCode: 321302
subject: Infant and child health

description: This dissertation focusses on attention outcomes in children born preterm, exploring specific neural and environmental factors that may contribute to attention outcomes in children born preterm, such as grey matter volume on neonatal MRI, parenting behaviours, and motor functioning.