cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hubble Space Telescope survey of Magellanic Cloud star clusters. Photometry and astrometry of 113 clusters and early results
Creators: name: Milone, A. P.
name: Cordoni, G.
name: Marino, A. F.
name: D'Antona, F.
name: Bellini, A.
name: Di Criscienzo, M.
name: Dondoglio, E.
name: Lagioia, E. P.
name: Langer, N.
name: Legnardi, M. V.
name: Libralato, M.
name: Baumgardt, H.
name: Bettinelli, M.
name: Cavecchi, Y.
name: de Grijs, R.
name: Deng, L.
name: Hastings, B.
name: Li, C.
name: Mohandasan, A.
name: Renzini, A.
name: Vesperini, E.
name: Wang, C.
name: Ziliotto, T.
name: Carlos, M.
name: Costa, G.
name: Dell'Agli, F.
name: Di Stefano, S.
name: Jang, S.
name: Martorano, M.
name: Simioni, M.
name: Tailo, M.
name: Ventura, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the past years, we have undertaken an extensive investigation of LMC and SMC star clusters based on HST data. We present photometry and astrometry of stars in 101 fields observed with the WFC/ACS, UVIS/WFC3 and NIR/WFC3 cameras. These fields comprise 113 star clusters. We provide differential-reddening maps and illustrate various scientific outcomes that arise from the early inspection of the photometric catalogs. In particular, we provide new insights on the extended main-sequence turn-off (eMSTO) phenomenon: i) We detected eMSTOs in two clusters, KMHK361 and NGC265, which had no previous evidence of multiple populations. This finding corroborates the conclusion that the eMSTO is a widespread phenomenon among clusters younger than ~2 Gyr. ii) The homogeneous color-magnitude diagrams (CMDs) of 19 LMC clusters reveal that the distribution of stars along the eMSTO depends on cluster age. iii) We discovered a new feature along the eMSTO of NGC1783, which consists of a distinct group of stars going on the red side of the eMSTO in CMDs composed of ultraviolet filters. Furthermore, we derived the proper motions of stars in the fields of view of clusters with multi-epoch images. Proper motions allowed us to separate the bulk of bright field stars from cluster members and investigate the internal kinematics of stellar populations in various LMC and SMC fields. As an example, we analyze the field around NGC346 to disentangle the motions of its stellar populations, including NGC364 and BS90, young and pre-MS stars in the star-forming region associated with NGC346, and young and old field stellar populations of the SMC. Based on these results and the fields around five additional clusters, we find that young SMC stars exhibit elongated proper-motion distributions that point toward the LMC, thus bringing new evidence for a kinematic connection between the LMC and SMC.
description: 37 pages, 27 figures, accepted for publication in Astronomy & Astrophysics
Linking Mathematical Software In Web Archives
Creators: name: Holzmann, Helge
name: Sperber, Wolfram
name: Runnwerth, Mila
Publisher: name: Zenodo
Year: 2016
Subjects: web archive, mathematical software

description: The Web is our primary source of all kinds of information today, including software as well as associated materials, such as source code, documentation, related publications and change logs. Our recent analysis has shown a considerable temporal correlation between the number software references in scientific articles and links to the corresponding websites. We found that around 60% of all software webpages link to documentation and another 50% even contain artifacts of the actual software. As software is dynamic, just like the Web, it is crucial to preserve the websites of software as well as linked materials on the Web to capture a software’s state over time. A Web a rchiving infrastructure tailored to this purpose, with can support comprehensible referencing mathematical software in scientific publications. As a first step, already published articles can be addressed by integrating existing Web archives with software directories, such as swMATH. We found that around 40% of the software websites linked in swMATH also exist in a Web archive, which can be linked based on the publication dates of corresponding articles. In our talk, we will present the potential of Web archives for the scientific software management process and showcase current efforts, open challenges as well as what is remaining for future work.
MINDS. The detection of $^{13}$CO$_{2}$ with JWST-MIRI indicates abundant CO$_{2}$ in a protoplanetary disk
Creators: name: Grant, Sierra L.
name: van Dishoeck, Ewine F.
name: Tabone, Benoît
name: Gasman, Danny
name: Henning, Thomas
name: Kamp, Inga
name: Güdel, Manuel
name: Lagage, Pierre-Olivier
name: Bettoni, Giulio
name: Perotti, Giulia
name: Christiaens, Valentin
name: Samland, Matthias
name: Arabhavi, Aditya M.
name: Argyriou, Ioannis
name: Abergel, Alain
name: Absil, Olivier
name: Barrado, David
name: Boccaletti, Anthony
name: Bouwman, Jeroen
name: Garatti, Alessio Caratti o
name: Geers, Vincent
name: Glauser, Adrian M.
name: Guadarrama, Rodrigo
name: Jang, Hyerin
name: Kanwar, Jayatee
name: Lahuis, Fred
name: Morales-Calderón, Maria
name: Mueller, Michael
name: Nehmé, Cyrine
name: Olofsson, Göran
name: Pantin, Eric
name: Pawellek, Nicole
name: Ray, Tom P.
name: Rodgers-Lee, Donna
name: Scheithauer, Silvia
name: Schreiber, Jürgen
name: Schwarz, Kamber
name: Temmink, Milou
name: Vandenbussche, Bart
name: Vlasblom, Marissa
name: Waters, L. B. F. M.
name: Wright, Gillian
name: Colina, Luis
name: Greve, Thomas R.
name: Justannont, Kay
name: Östlin, Göran
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present JWST-MIRI MRS spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey (MINDS) GTO program. Emission from $^{12}$CO$_{2}$, $^{13}$CO$_{2}$, H$_{2}$O, HCN, C$_{2}$H$_{2}$, and OH is identified with $^{13}$CO$_{2}$ being detected for the first time in a protoplanetary disk. We characterize the chemical and physical conditions in the inner few au of the GW Lup disk using these molecules as probes. The spectral resolution of JWST-MIRI MRS paired with high signal-to-noise data is essential to identify these species and determine their column densities and temperatures. The $Q$-branches of these molecules, including those of hot-bands, are particularly sensitive to temperature and column density. We find that the $^{12}$CO$_{2}$ emission in the GW Lup disk is coming from optically thick emission at a temperature of $\sim$400 K. $^{13}$CO$_{2}$ is optically thinner and based on a lower temperature of $\sim$325 K, may be tracing deeper into the disk and/or a larger emitting radius than $^{12}$CO$_{2}$. The derived $N_{\rm{CO_{2}}}$/$N_{\rm{H_{2}O}}$ ratio is orders of magnitude higher than previously derived for GW Lup and other targets based on \textit{Spitzer}-IRS data. This high column density ratio may be due to an inner cavity with a radius in between the H$_{2}$O and CO$_{2}$ snowlines and/or an overall lower disk temperature. This paper demonstrates the unique ability of JWST to probe inner disk structures and chemistry through weak, previously unseen molecular features.
description: 15 pages, 10 figures. Accepted to ApJL
In silico design of a multi-epitope vaccine against the spike and the nucleocapsid proteins of the Omicron variant of SARS-CoV-2
Creators: name: Bayani, Fatemeh
name: Hashkavaei, Negin Safaei
name: Karamian, Mohammad Reza
name: Uskoković, Vuk
name: Sefidbakht, Yahya
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Computational studies can comprise an effective approach to treating and preventing viral infections. Since 2019, the world has been dealing with the outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The most important achievement in this short period of time in the effort to reduce morbidity and mortality was the production of vaccines and effective antiviral drugs. Although the virus has been significantly suppressed, it continues to evolve, spread, and evade the host’s immune system. Recently, researchers have turned to immunoinformatics tools to reduce side effects and save the time and cost of traditional vaccine production methods. In the present study, an attempt has been made to design a multi-epitope vaccine with humoral and cellular immune response stimulation against the Omicron variant of SARS-CoV-2 by investigating new mutations in spike (S) and nucleocapsid (N) proteins. The population coverage of the vaccine was evaluated as appropriate compared to other studies. The results of molecular dynamics simulation and molecular mechanics/generalized Born surface area (MM/GBSA) calculations predict the stability and proper interaction of the vaccine with Toll-like receptor 4 (TLR-4) as an innate immune receptor. The results of the immune simulation show a significant increase in the coordinated response of IgM and IgG after the third injection of the vaccine. Also, in the continuation of the research, spike proteins from BA.4 and BA.5 lineages were screened by immunoinformatics filters and effective epitopes were suggested for vaccine design. Despite the high precision of computational studies, in-vivo and in-vitro research is needed for final confirmation. Communicated by Ramaswamy H. Sarma
The central engines of two unusual radio-intermediate/quiet active galactic nuclei: III Zw 2 and PG 1407+265
Creators: name: Chen, Liang
name: Cao, Xinwu
name: Bai, Jinming
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the accretion disk/corona+jet model to fit the multi-band spectral energy distributions (SEDs) of two unusual radio-intermediate/quiet quasars. It is found that the optical/UV emission of III Zw 2 is probably dominated by the emission from the accretion disk. The X-ray emission should be dominated by the radiation from the jet, while the contribution of the disk corona is negligible. The optical/UV component in the SED of PG 1407+265 can be well modeled as the emission from the accretion disk, while the IR component is attributed to the thermal radiation from the dust torus with an opening angle ~ 50\circ. If the X-ray continuum emission is dominated by the synchrotron emission of the jet, the source should be a "high peak frequency blazar", which obviously deviates the normal blazar sequence. The observed SED can also be fitted quite well by the accretion disk/corona model with the viscosity parameter ? = 0:5. The spectrum of the accretion disk/corona in PG 1407+265 satisfies the weak line quasar criterion suggested in Laor & Davis.
description: 26 pages, 5 figures, Accepted by ApJ
title: Gambling in Canada : final report and recommendations
title: Gambling in Canada : triumph, tragedy, or tradeoff?
titleType: AlternativeTitle
Creators: name: Azmier, Jason J.
Publisher: name: Canada West Foundation
Year: 2001
Subjects: Gambling -- Canada
Gambling -- Government policy -- Canada

description: Page 1 of report indicates "Permission is hereby granted by the CWF to reproduce this document for non-profit and educational purposes."
description: Gambling in Canada: Triumph, Tragedy or tradeoff? was a three year independent and objective national study of gambling in Canada running from September 1998 to October 2001. It remains the only national study on gambling policy in Canada. Four overarching research areas were explored: (1) the impact of gambling on the non-profit sector; (2) opinions, attitudes and public policy implications of gambling; (3) the history and scope of gambling in Canada; and, (4) the socio-economic impact of gambling on communities. Through the work in these areas, the project provided a much-needed comprehensive picture of the issues surrounding gambling in Canada.
Mycetophila mitis
Creators: name: El Mouden, Mohamed Amin
name: Chandler, Peter J.
name: Saidoun, Imane
name: Driauach, Ouafaa
name: Belqat, Boutaïna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Mycetophila
Mycetophila mitis

description: Mycetophila mitis (Johannsen, 1912)
Material examined.
Morocco – Middle Atlas Region • 12 ♂♂; Gouffre Izora; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/24144 • 3 ♂♂; Grotte Bouslama; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/24145 • 2 ♂♂; Grotte Bouhayati; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/24146.
North African distribution.
New to Morocco and North Africa.
description: Published as part of El Mouden, Mohamed Amin, Chandler, Peter J., Saidoun, Imane, Driauach, Ouafaa & Belqat, Boutaïna, 2025, A new species of Docosia Winnertz, 1864 and new records of fungus gnats (Diptera, Bolitophilidae, Keroplatidae and Mycetophilidae) from North Africa, pp. 349-379 in ZooKeys 1233 on pages 349-379, DOI: 10.3897/zookeys.1233.130502
Spectral Emission Properties of a Nitrogen-doped Diamond(001) Photocathode: Hot Electron Transport and Transverse Momentum Filtering
Creators: name: Angeloni, Louis A.
name: Baryshev, Sergey V.
name: Muehle, Matthias
name: Schroeder, W. Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The electron emission properties of a single-crystal nitrogen-doped diamond(001) photocathode inserted in a 10kV DC photoelectron gun are determined using a tunable (235-410nm) ultraviolet laser radiation source for photoemission from both the back nitrogen-doped substrate face and the front homo-epitaxially grown and undoped diamond crystal face. The measured spectral trends of the mean transverse energy (MTE) and quantum efficiency (QE) of the emitted electrons are both anomalous and non-monotonic, but are shown to be consistent with (i) the known physics of electron photoexcitation from the nitrogen substitution states into the conduction bands of diamond, (ii) the energy position and dispersion characteristics of the conduction bands of diamond in the (001) emission direction, (iii) the effective electron affinity of the crystal faces, (iv) the strong electron-(optical)phonon coupling in diamond, and (v) the associated hot electron transport dynamics under energy equipartition with the optical phonons. Notably, the observed hot electron emission is shown to be restricted parallel to the photocathode surface by the low transverse effective masses of the emitting band states - a transverse momentum filtering effect.
description: 14 pages, 4 figures
Testing of $P$ and $CP$ Symmetries with $e^+e^- \to J/ψ\to Λ\bar Λ$
Creators: name: He, X. G.
name: Ma, J. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose to test $P$- and $CP$-symmetries with the process $e^+e^- \to J/ψ\to Λ\bar Λ$. The general form of the angular distribution of the process is derived and several observables for the proposed test are introduced. With these observables one can distinguish the effects of $P$-violations in the production of $J/ψ$ from its decay into a pair of $Λ\bar Λ$. Numerical estimations for proposed asymmetries of $P$-violation due to $Z$ exchange in SM are given. Our results show that BESIII has reached the sensitivity to probe these effects. At the proposed super-tau-charm factory with much enhanced luminosity it will be able to test the SM predictions with high precision. $CP$ violating effect in $J/ψ\to Λ\bar Λ$ can also be tested. In particular, BESIII data already reached the sensitivity to prove $CP$ violating effect due to current upper limit of electric dipole moment of $Λ$. At the proposed super-tau-charm factory the upper limit can be improved by an order of magnitude.
description: 10 pages, no figure, published version
Prime Tuples in Function Fields
Creators: name: Bary-Soroker, Lior
Publisher: name: Mathematisches Forschungsinstitut Oberwolfach
Year: 2016
Subjects: Algebra and Number Theory

description: How many prime numbers are there? How are they distributed among other numbers? These are questions that have intrigued mathematicians since ancient times.  However, many questions in this area have remained unsolved, and seemingly unsolvable in the forseeable future. In this snapshot, we will discuss one such problem, the Twin Prime Conjecture, and a quantitative version of it known as the Hardy–Littlewood Conjecture. We will also see that these and other questions about prime numbers can be extended to questions about function fields, and discuss recent progress which has been made to answer them in this context.
description: Snapshots of modern mathematics from Oberwolfach; No. 10/2016
Molecular docking and dynamics supported investigation of antiviral activity of Lichen metabolites of Roccella montagnei: an in silico and in vitro study
Creators: name: Bhat, Nishanth B.
name: Das, Subham
name: Sridevi, Balireddy V. S.
name: H, Raghu Chandrashekhar
name: Nayaka, Sanjeeva
name: S, Narasimhan
name: Birangal, Sumit Raosaheb
name: Shenoy, G. Gautham
name: Joseph, Alex
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Lichens are symbiotic organisms that have been traditionally used for treating different kinds of ailments. As there are only a few reports on the antiviral activity of lichens, we thought of evaluating the anti-Herpes simplex virus-1 (HSV-1) activity of methanolic extract of Roccella montagnei and their isolated compounds. Fractionation of crude methanolic extract of Roccella montagnei by column chromatography isolated two pure compounds. Antiviral activity was assessed using a CPE inhibition assay at non-cytotoxic concentrations on Vero cells. Molecular docking and dynamics studies were carried out against Herpes simplex type-1 thymidine kinase to understand the binding interactions of the isolated compounds with reference to acyclovir. Isolated compounds were characterized as methyl orsellinate and montagnetol by spectral methods. Methanolic extract of Roccella montagnei exhibited an EC50 value of 56.51 µg/ml, while the compounds methyl orsellinate and montagnetol offered EC50 values of 13.50 µg/ml and 37.52 µg/ml, respectively, against HSV-1 viral infection on Vero cell lines. The selectively index (SI) of montagnetol (10.93) was found to be higher when compared to that of methyl orsellinate (5.55), indicating its better anti-HSV-1 activity. The docking and dynamics studies showed montagnetol was stable throughout the 100 ns, having better interactions and docking scores with HSV-1 thymidine kinase than methyl orsellinate, as well as the standard. To understand the mechanism of montagnetol’s anti-HSV-1 activity, more research is required, and this could lead to the discovery of new and effective antiviral agents. Communicated by Ramaswamy H. Sarma
An estimate of the temporal fraction of cloud cover at San Pedro Mártir Observatory
Creators: name: Carrasco, E.
name: Carramiñana, A.
name: Sánchez, L. J.
name: Avila, R.
name: Cruz-González, I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: San Pedro Mártir in the Northwest of Mexico is the site of the Observatorio Astronómico Nacional. It was one of the five candidates sites for the Thirty Meter Telescope, whose site-testing team spent four years measuring the atmospheric properties on site with a very complete array of instrumentation. Using the public database created by this team, we apply a novel method to solar radiation data to estimate the daytime fraction of time when the sky is clear of clouds. We analyse the diurnal, seasonal and annual cycles of cloud cover. We find that 82.4 per cent of the time the sky is clear of clouds. Our results are consistent with those obtained by other authors, using different methods, adding support to this value and proving the potential of the applied method. The clear conditions at the site are particularly good showing that San Pedro Mártir is an excellent site for optical and infrared observations.
description: Accepted MNRAS (November 2011), 10 pages, 14 figures
Mid-infrared properties of nearby low-luminosity AGN at high angular resolution
Creators: name: Asmus, D.
name: Gandhi, P.
name: Smette, A.
name: Hönig, S. F.
name: Duschl, W. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: High spatial resolution mid-infrared (MIR) 12 \mum continuum imaging of low-luminosity active galactic nuclei (LLAGN) obtained by VLT/VISIR is presented. The goal of this investigation is to determine if the nuclear MIR emission of LLAGN is consistent with the existence of a dusty obscuring torus. A sample of 17 nearby LLAGN was selected and combined with archival VISIR data of 9 additional LLAGN with available X-ray measurements. Of the 17 observed LLAGN, 7 are detected, while upper limits are derived for the 10 non-detections. All detections except NGC 3125 appear point-like on a spatial scale of \sim 0.35". The detections do not significantly deviate from the known MIR-X-ray correlation but extend it by a factor of \sim 10 down to luminosities < 10^41 erg/s with a narrow scatter. The latter is dominated by the uncertainties in the X-ray luminosity. Interestingly, a similar correlation with comparable slope but with a normalization differing by \sim 2.6 orders of magnitude has been found for local starburst galaxies. In addition, the VISIR data are compared with lower spatial resolution data from Spitzer/IRS and IRAS. By using a scaled starburst template SED and the PAH 11.3 \mum emission line the maximum nuclear star formation contamination to the VISIR photometry is restricted to < 30% for 75% of the LLAGN. Exceptions are NGC 1097 and NGC 1566, which may possess unresolved strong PAH emission. Furthermore, within the uncertainties the MIR-X-ray luminosity ratio is unchanged over more than 4 orders of magnitude in accretion rate. These results are consistent with the existence of the dusty torus in all observed LLAGN, although the jet or accretion disk as origin of the MIR emission cannot be excluded. Finally, the fact that the MIR-X-ray correlation holds for all LLAGN and Seyferts makes it a very useful empirical tool for converting between the MIR and X-ray powers of these nuclei.
description: 19 pages, 7 figures, accepted for publication in A&A
QCD Factorization of Quasi Generalized Gluon Distributions
Creators: name: Ma, J. P.
name: Pang, Z. Y.
name: Zhang, C. P.
name: Zhang, G. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the factorization relations between quasi gluon GPDs and twist-2 GPDs. The perturbative coefficient functions are obtained at one-loop level. They are free from any collinear- or I.R. divergences. Unlike the case of the factorization of quasi quark GPDs at one-loop, we have to add ghost contributions for the factorization of quasi gluon GPDs in order to obtain gauge-invariant results. In general, operators will be mixed beyond tree-level. Our work shows that the mixing pattern of the nonlocal operators in quasi gluon GPDs is the same as local operators, i.e., the nonlocal operators considered are mixed with gauge-invariant operators, BRST-variation operators and operators involving EOM operator. The factorization relations are obtained for all quasi gluon GPDs. Taking the forward limit, we also obtain the relations between quasi gluon PDFs and twist-2 PDFs.
description: 23 pages, 5 figures, published version
Quantum communication through devices with indefinite input-output direction
Creators: name: Liu, Zixuan
name: Yang, Ming
name: Chiribella, Giulio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Certain quantum devices, such as half-wave plates and quarter-wave plates in quantum optics, are bidirectional, meaning that the roles of their input and output ports can be exchanged. Bidirectional devices can be used in a forward mode and a backward mode, corresponding to two opposite choices of the input-output direction. They can also be used in a coherent superposition of the forward and backward modes, giving rise to new operations with indefinite input-output direction. In this work we explore the potential of input-output indefiniteness for the transfer of classical and quantum information through noisy channels. We first formulate a model of communication from a sender to a receiver via a noisy channel used in indefinite input-output direction. Then, we show that indefiniteness of the input-output direction yields advantages over standard communication protocols in which the given noisy channel is used in a fixed input-output direction. These advantages range from a general reduction of noise in bidirectional processes, to heralded noiseless transmission of quantum states, and, in some special cases, to a complete noise removal. The noise reduction due to input-output indefiniteness can be experimentally demonstrated with current photonic technologies, providing a way to investigate the operational consequences of exotic scenarios characterised by coherent quantum superpositions of forward-time and backward-time processes.
description: 13 + 8 pages, 4 figures
Fast generation of mock galaxy catalogues with COLA
Creators: name: Ding, Jiacheng
name: Li, Shaohong
name: Zheng, Yi
name: Luo, Xiaolin
name: Zhang, Le
name: Li, Xiao-Dong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We investigate the feasibility of using COmoving Lagrangian Acceleration (COLA) technique to efficiently generate galaxy mock catalogues that can accurately reproduce the statistical properties of observed galaxies. Our proposed scheme combines the subhalo abundance matching (SHAM) procedure with COLA simulations, utilizing only three free parameters: the scatter magnitude ($σ_{\rm scat}$) in SHAM, the initial redshift ($z_{\rm init}$) of the COLA simulation, and the time stride ($da$) used by COLA. In this proof-of-concept study, we focus on a subset of BOSS CMASS NGC galaxies within the redshift range $z\in [0.45, 0.55]$. We perform $\mathtt{GADGET}$ simulation and low-resolution COLA simulations with various combinations of $(z_{\rm init}, da)$, each using $1024^{3}$ particles in an $800~h^{-1}{\rm Mpc}$ box. By minimizing the difference between COLA mock and CMASS NGC galaxies for the monopole of the two-point correlation function (2PCF), we obtain the optimal $σ_{\rm scat}$. We have found that by setting $z_{\rm init}=29$ and $da=1/30$, we achieve a good agreement between COLA mock and CMASS NGC galaxies within the range of 4 to $20~h^{-1}{\rm Mpc}$, with a computational cost two orders of magnitude lower than that of the N-body code. Moreover, a detailed verification is performed by comparing various statistical properties, such as anisotropic 2PCF, three-point clustering, and power spectrum multipoles, which shows similar performance between GADGET mock and COLA mock catalogues with the CMASS NGC galaxies. Furthermore, we assess the robustness of the COLA mock catalogues across different cosmological models, demonstrating consistent results in the resulting 2PCFs. Our findings suggest that COLA simulations are a promising tool for efficiently generating mock catalogues for emulators and machine learning analyses in exploring the large-scale structure of the Universe.
description: 24 pages, 14 figures, 4 tables
On the $RP^{N-1}$ and $CP^{N-1}$ universality classes
Creators: name: Diouane, Youness
name: Lamsen, Noel
name: Delfino, Gesualdo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We recently determined the exact fixed point equations and the spaces of solutions of the two-dimensional $RP^{N-1}$ and $CP^{N-1}$ models using scale invariant scattering theory. Here we discuss subtleties hidden in some solutions and related to the difference between ferromagnetic and antiferromagnetic interaction.
Microcanonical Determination of the Interface Tension of Flat and Curved Interfaces from Monte Carlo Simulations
Creators: name: Tröster, A.
name: Binder, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The investigation of phase coexistence in systems with multi-component order parameters in finite systems is discussed, and as a generic example, Monte Carlo simulations of the two-dimensional q-state Potts model (q=30) on LxL square lattices (40<=L<=100) are presented. It is shown that the microcanonical ensemble is well-suited both to find the precise location of the first order phase transition and to obtain an accurate estimate for the interfacial free energy between coexisting ordered and disordered phases. For this purpose, a microcanonical version of the heatbath algorithm is implemented. The finite size behaviour of the loop in the curve describing the inverse temperature versus energy density is discussed, emphasizing that the extrema do not have the meaning of van der Waals-like "spinodal points" separating metastable from unstable states, but rather describe the onset of heterophase states: droplet/bubble evaporation/condensation transitions. Thus all parts of these loops, including the parts that correspond to a negative specific heat, describe phase coexistence in full thermal equilibrium. However, the estimates for the curvature-dependent interface tension of the droplets and bubbles suffer from unexpected and unexplained large finite size effects which need further study.
description: submitted to special issue "Liquid Matter" of Journal of Physics C: Condensed Matter on occasion of the 8th Liquid Matter Conference held Sept. 6-10, 2011 in Vienna, Austria
Resonantly enhanced interatomic Coulombic electron capture in a system of three atoms
Creators: name: Remme, S.
name: Voitkiv, A. B.
name: Müller, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: In interatomic Coulombic electron capture, the capture of a free electron at an atomic center is accompanied by the radiationless transfer of the excess energy to a neighboring atom of different species, leading to ionization of the latter. We show that this interatomic process can be strongly enhanced by the presence of an additional third atom, provided the energy of the free-bound capture transition in the first atom is resonant to a dipole-allowed excitation energy in this assisting atom. The relation of the resonantly enhanced three-center electron capture with other processes is discussed, and its dependencies on the incident electron energy and the spatial geometry of the triatomic system are illustrated.
description: 8 pages, 5 figures
Real Time Communication Capacity for Data Delivery in Wireless Sensor Networks
Creators: name: Virmani, Deepali
name: Jain, Satbir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Real-time applications are performance critical applications that require bounded service latency. In multi-hop wireless ad-hoc and sensor networks, communication delays are dominant over processing delays. Therefore, to enable real-time applications in such networks, the communication latency must be bounded. In this paper, we derive expressions of real-time capacity that characterize the ability of a network to deliver data on time as well as develop network protocols that achieve this capacity. Real-time capacity expressions are obtained and analyzed for the earliest deadline first, deadline monotonic. This paper presents a treatment of the real-time capacity limits. The limits are derived for two extreme traffic topologies namely, the load balanced topology and the convergecast (i.e., many-to-one) topology. It considers DM and EDF scheduling algorithms, and discusses the implications of the capacity limit expressions.
description: 10 pages, 7 figures
Near-vertical and wide-angle seismic reflection studies of the Moho and sub-crustal lithosphere in NW Canada
Creators: name: Oueity, Jounada
Publisher: name: University of British Columbia
Year: 2010

description: High quality, coincident near-vertical incidence (NVI) and refraction/wide-angle seismic reflection data (R/WAR) acquired along a profile in the Northwest Territories are used to study the nature of the Moho and subcrustal reflectors. First, we re-examine distinct subhorizontal reflections on NVI data in the uppermost mantle that were interpreted previously as a separate feature from a relict subducted slab. Using forward and inverse traveltime modeling of both data sets along the crooked line, we investigate the origin of the reflections. Our results demonstrate that the subhorizontal reflectors are the continuation of the relict subducted slab, which extends laterally for 300 km at depths from 35 to 90 km. Its base is the source of the R/WAR reflections. The apparent flattening is an artifact of projecting a 3-D geometry onto a 2-D cross section. The shallowly subducted slab probably contributed to the thickening and stabilization of the sub-crustal lithosphere in the region. Second, we examine the detailed structure of the Moho and propose a possible scenario for its formation and evolution. Strong Moho reflections are observed on the NVI data (shot gathers and stacked section). The WA data are characterized by a ~0.5 s coda trailing the PmP (Moho) phase. For analysis of these observed data, we follow two approaches, forward and inverse modeling. In forward modeling, we calculate wide-angle and near-vertical synthetic seismograms using 1- and 2-D wave propagation algorithms. Comparison between synthetic and observed data for shot gathers was made possible through development of a novel noise-removal technique using the curvelet transform. For the inverse method, we use a statistical analysis approach based on the von Karman autocorrelation function. Our results indicate that the Moho is a finite-thickness (~3 km), heterogeneous transition zone. The heterogeneities can be described by laterally discontinuous layering, lamellae structure with randomly distributed ellipses or a von Karman distribution with a lateral correlation length of 936 m. The transition zone separates the lower crust with a lateral correlation length of 732 m from the uppermost mantle with a correlation length of 261 m. The Moho is interpreted as a thermal/metamorphic front, a regional décollement, or both.
A Bayesian Approach to Calibrating Period-Luminosity Relations of RR Lyrae Stars in the Mid-Infrared
Creators: name: Klein, Christopher R.
name: Richards, Joseph W.
name: Butler, Nathaniel R.
name: Bloom, Joshua S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A Bayesian approach to calibrating period-luminosity (PL) relations has substantial benefits over generic least-squares fits. In particular, the Bayesian approach takes into account the full prior distribution of the model parameters, such as the a priori distances, and refits these parameters as part of the process of settling on the most highly-constrained final fit. Additionally, the Bayesian approach can naturally ingest data from multiple wavebands and simultaneously fit the parameters of PL relations for each waveband in a procedure that constrains the parameter posterior distributions so as to minimize the scatter of the final fits appropriately in all wavebands. Here we describe the generalized approach to Bayesian model fitting and then specialize to a detailed description of applying Bayesian linear model fitting to the mid-infrared PL relations of RR Lyrae variable stars. For this example application we quantify the improvement afforded by using a Bayesian model fit. We also compare distances previously predicted in our example application to recently published parallax distances measured with the Hubble Space Telescope and find their agreement to be a vindication of our methodology. Our intent with this article is to spread awareness of the benefits and applicability of this Bayesian approach and encourage future PL relation investigations to consider employing this powerful analysis method.
description: 6 pages, 1 figure. Accepted for publication in Astrophysics & Space Science. Following a presentation at the conference The Fundamental Cosmic Distance Scale: State of the Art and the Gaia Perspective, Naples, May 2011
Dynamic conformational states of apo, ATP and cabozantinib bound TAM kinases to differentiate active-inactive kinetic models
Creators: name: Naresh, Gatta K. R. S.
name: Guruprasad, Lalitha
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: The dynamically active and inactive conformations of kinases play a crucial role in the activation of intracellular downstream signaling pathways. The all-atom molecular dynamics (MD) simulations at microsecond (µs) timescale and longer provide robust insights into the structural details of conformational alterations in kinases that contribute to their cellular metabolic activities and signaling pathways. Tyro3, Axl and Mer (TAM) receptor tyrosine kinases (RTKs) are overexpressed in several types of human cancers. Cabozantinib, a small molecule inhibitor constrains the activity of TAM kinases at nanomolar concentrations. The apo, complexes of ATP (active state) and cabozantinib (active and inactive states) with TAM RTKs were studied by 1 µs MD simulations followed by trajectory analyses. The dynamic mechanistic pathways intrinsic to the kinase activity and protein conformational landscape in the cabozantinib bound TAM kinases are revealed due to the alterations in the P-loop, α-helix and activation loop that result in breaking the regulatory (R) and catalytic (C) spines, while the active states of ATP bound TAM kinases are retained. The co-existence of dynamical states when bound to cabozantinib was observed and the long-lived kinetic transition states of distinct active and inactive structural models were deciphered from MD simulation trajectories that have not been revealed so far. Communicated by Ramaswamy H. Sarma
title: Stimuli-Responsive Polyelectrolyte Brushes As a Matrix for the Attachment of Gold Nanoparticles: The Effect of Brush Thickness on Particle Distribution
Creators: name: Christau, Stephanie
name: Thurandt, Stefan
name: Yenice, Zuleyha
name: Klitzing, Regine von
Publisher: name: MDPI
Year: 2021

description: The effect of brush thickness on the loading of gold nanoparticles (AuNPs) within stimuli-responsive poly-(N,N-(dimethylamino ethyl) methacrylate) (PDMAEMA) polyelectrolyte brushes is reported. Atom transfer radical polymerization (ATRP) was used to grow polymer brushes via a “grafting from” approach. The brush thickness was tuned by varying the polymerization time. Using a new type of sealed reactor, thick brushes were synthesized. A systematic study was performed by varying a single parameter (brush thickness), while keeping all other parameters constant. AuNPs of 13 nm in diameter were attached by incubation. X-ray reflectivity, electron scanning microscopy and ellipsometry were used to study the particle loading, particle distribution and interpenetration of the particles within the brush matrix. A model for the structure of the brush/particle hybrids was derived. The particle number densities of attached AuNPs depend on the brush thickness, as do the optical properties of the hybrids. An increasing particle number density was found for increasing brush thickness, due to an increased surface roughness.
Geometrically contracted structure in teleparallel $f(T)$ gravity
Creators: name: Moreira, A. R. P.
name: Lima, F. C. E.
name: Almeida, C. A. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the teleparallel $f(T)$ gravity scenario, we consider a five-dimensional thick brane. This scenario is interesting because this theory can provide explanations for inflation, radiation, and dark matter under certain conditions. It is convenient to assume, for our study, a polynomial profile of the function $f(T)$. Indeed, some polynomial profiles can produce internal structures for which a brane splitting occurs. For functions $f(T)$ with this capability, geometrically contracted matter field configurations are obtained. These contractions of the matter field for the profiles of $f(T)$ reproduce compact-like settings. To complement the study, we analyze the stability of the brane using the concept of Configurational Entropy (CE). The CE arguments are interesting because they tell us the most stable and likely configurations from the brane in this gravitational background. Therefore, we can indicate the best profile of the function $f(T)$.
description: 22 pages, 15 captioned figures. To appear in International Journal of Modern Physics D
Supplementary document for Optical Constants of Germanium Antimony Telluride (GST) in Amorphous, Crystalline, and Intermediate States - 6617206.pdf
Creators: name: Frantz, Jesse
name: Myers, Jason
name: Clabeau, Anthony
name: Bekele, Robel
name: Hong, Nina
name: Vincenti, Maria Antonietta
name: gandolfi, marco
name: Sanghera, Jasbinder
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Optical Properties of Materials

description: Supplemental document for 506019
Curvelet-based migration amplitude recovery
Creators: name: P. Moghaddam, Peyman
Publisher: name: University of British Columbia
Year: 2010

description: Migration can accurately locate reflectors in the earth but in most cases fails to correctly resolve their amplitude. This might lead to mis-interpretation of the nature of reflector. In this thesis, I introduced a method to accurately recover the amplitude of the seismic reflector. This method relies on a new transform-based recovery that exploits the expression of seismic images by the recently developed curvelet transform. The elements of this transform, called curvelets, are multi-dimensional, multi-scale, and multi-directional. They also remain approximately invariant under the imaging operator. I exploit these properties of the curvelets to introduce a method called Curvelet Match Filtering (CMF) for recovering the seismic amplitude in presence of noise in both migrated image and data. I detail the method and illustrate its performance on synthetic dataset. I also extend CMF formulation to other geophysical applications and present results on multiple removal. In addition of that, I investigate preconditioning of the migration which results to rapid convergence rate of the iterative method using migration.
Bound states around impurities in a superconducting bilayer
Creators: name: Zhu, Yufei
name: Hackner, Nico A.
name: Brydon, P. M. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study the appearance of bound states around impurities in a superconducting bilayer. We focus our attention on $s$-wave pairing, which includes unconventional odd-parity states permitted by the layer degree of freedom. Utilizing numerical mean-field and analytical $T$-matrix methods, we survey the bound state spectrum produced by momentum-independent impurity potentials in this model. For even-parity $s$-wave pairing bound states are only found for impurities which break time-reversal symmetry. For odd-parity $s$-wave states, in contrast, bound states are generically found for all impurity potentials, and fall into six distinct categories. This categorization remains valid for nodal gaps. Our results are conveniently understood in terms of the ``superconducting fitness'' concept, and show an interplay between the pair-breaking effects of the impurity and the normal-state band structure.
Collective Modes of Massive Dirac Fermions in Armchair Graphene Nanoribbons
Creators: name: Andersen, David R.
name: Raza, Hassan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the plasmon dispersion characteristics of intrinsic and extrinsic armchair graphene nanoribbons of atomic width N = 5 using a p_z-orbital tight binding model with third-nearest-neighbor (3nn) coupling. The coupling parameters are obtained by fitting the 3nn dispersions to that of an extended Huckel theory. The resultant massive Dirac Fermion system has a band gap E_g \approx 64 meV. The extrinsic plasmon dispersion relation is found to approach a common dispersion curve as the chemical potential $μ$ increases, whereas the intrinsic plasmon dispersion relation is found to have both energy and momentum thresholds. We also report an analytical model for the extrinsic plasmon group velocity in the q \rightarrow 0 limit.