cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Unraveling property-performance relationships by surface tailoring of oxidation catalysts via ALD
Creators: name: Knemeyer, Kristian
name: Epping, Jan Dirk
name: Rüther, Frederik
name: Schulz, Christian
name: Frank, Benjamin
name: Müller, Philipp
name: Naumann D’Alnoncourt, Raoul
name: Driess, Matthias
name: Rosowski, Frank
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: electron microscopy
subject: heterogeneous catalysis
subject: NMR spectroscopy
subject: oxidation
subject: surface chemistry

description: Atomic layer deposition (ALD) of POx on V2O5 powder was applied as a tool to tailor active and selective sites of a bulk catalyst. ALD leads to homogeneous P deposition on the V2O5 surface with linear increase of P content with each ALD cycle. The catalyst performance was evaluated and correlated to structural motifs identified by detailed characterization methods. The catalytic conversion of butane to maleic anhydride (MAN) was chosen as proof-of-concept reaction. The selectivity towards MAN increases with ALD cycle number from 1–3 ALD cycles and remains constant at higher ALD cycles. Restructuring of the catalyst surface is induced by steam during reaction conditions at elevated temperatures. Excessive P is migrating away from the catalyst surface to form various VOPO4 polymorphs revealing partially but homogeneously covered V2O5 by P. The formed VOPO4 species barely contribute to the yield to MAN. Solid-state 31P-NMR was used to identify fingerprints relevant for selectivity and activity. This work shows that synthesizing model catalysts by atomic layer deposition combined with detailed analytics can reveal property-performance relationships.
Magnetic Inclination Evolution of Accreting Neutron Stars in Intermediate/Low-Mass X-ray Binaries
Creators: name: Yang, Hao-Ran
name: Li, Xiang-Dong
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The magnetic inclination angle $χ$, namely the angle between the spin and magnetic axes of a neutron star (NS), plays a vital role in its observational characteristics. However, there are few systematic investigations on its long-term evolution, especially for accreting NSs in binary systems. Applying the model of \citet{2021MNRAS.505.1775B} and the binary evolution code \mesa{}, we simultaneously simulate the evolution of the accretion rate, spin period, magnetic field, and magnetic inclination angle of accreting NSs in intermediate/low X-ray binaries (I/LMXBs). We show that the evolution of $χ$ depends not only on the initial parameters of the binary systems, but also on the mass transfer history and the efficiency of pulsar loss. Based on the calculated results we present the characteristic distribution of $χ$ for various types of systems including ultracompact X-ray binaries, binary millisecond pulsars, and ultraluminous X-ray sources, and discuss their possible observational implications.
description: 12 pages, 7 figures, accepted for publication in ApJ
Verification of strain gradient elasticity computation by analytical solutions
Creators: name: Yang, Hua
name: Timofeev, Dmitry
name: Abali, B. Emek
name: Li, Baotong
name: Müller, Wolfgang H.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: analytical solutions
subject: strain gradient elasticity
subject: three-dimensional problems

description: As there are different computational methods for simulating problems in generalized mechanics, we present simple applications and their closed-form solutions for verifying a numerical implementation. For such a benchmark, we utilize these analytical solutions and examine three-dimensional numerical simulations by the finite element method (FEM) using IsoGeometric Analysis (IGA) with the aid of open source codes, called tIGAr, developed within the FEniCS platform. A study for the so-called wedge forces and double tractions help to comprehend their roles in the displacement solution as well as examine the significance by comparing to the closed form solutions for given boundary conditions. It is found that numerical results are in a good agreement with the analytical solutions if wedge forces and double tractions are considered. It is also presented how the wedge forces become necessary in order to maintain equilibrium in strain gradient materials.
Identifying non-Abelian topological ordered state and transition by momentum polarization
Creators: name: Zhang, Yi
name: Qi, Xiao-Liang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using a method called momentum polarization, we study the quasiparticle topological spin and edge-state chiral central charge of non-Abelian topological ordered states described by Gutzwiller-projected wave functions. Our results verify that the fractional Chern insulator state obtained by Gutzwiller projection of two partons in bands of Chern number 2 is described by $SU(2)_2$ Chern-Simons theory coupled to fermions, rather than the pure $SU(2)_2$ Chern-Simons theory. In addition, by introducing an adiabatic deformation between one Chern number 2 band and two Chern number 1 bands, we show that the topological order in the Gutzwiller-projected state does not always agree with the expectation of topological field theory. Even if the parton mean-field state is adiabatically deformed, the Gutzwiller projection can introduce a topological phase transition between Abelian and non-Abelian topologically ordered states. Our approach applies to more general topologically ordered states described by Gutzwiller-projected wave functions.
description: 9 pages, 8 figures
Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey
Creators: name: Brown, Alex J.
name: Parsons, Steven G.
name: van Roestel, Jan
name: Rebassa-Mansergas, Alberto
name: Breedt, Elmé
name: Dhillon, Vik S.
name: Dyer, Martin J.
name: Green, Matthew J.
name: Kerry, Paul
name: Littlefair, Stuart P.
name: Marsh, Thomas R.
name: Munday, James
name: Pelisoli, Ingrid
name: Sahman, David I.
name: Wild, James F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Wide-field time-domain photometric sky surveys are now finding hundreds of eclipsing white dwarf plus M dwarf binaries, a population encompassing a wealth of information and potential insight into white dwarf and close binary astrophysics. Precise follow-up observations are essential in order to fully constrain these systems and capitalise on the power of this sample. We present the first results from our program of high-speed, multi-band photometric follow-up. We develop a method to measure temperatures, (model-dependent) masses, and radii for both components from the eclipse photometry alone and characterize 34 white dwarf binaries, finding general agreement with independent estimates using an alternative approach while achieving around a factor of two increase in parameter precision. In addition to these parameter estimates, we discover a number of interesting systems -- finding four with sub-stellar secondaries, doubling the number of eclipsing examples, and at least six where we find the white dwarf to be strongly magnetic, making these the first eclipsing examples of such systems and key to investigating the mechanism of magnetic field generation in white dwarfs. We also discover the first two pulsating white dwarfs in detached and eclipsing post-common-envelope binaries -- one with a low-mass, likely helium core, and one with a relatively high mass, towards the upper end of the known sample of ZZ Cetis. Our results demonstrate the power of eclipse photometry, not only as a method of characterising the population, but as a way of discovering important systems that would have otherwise been missed by spectroscopic follow-up.
description: 12 pages with a 5 page appendix and 14 figures. Accepted for publication in MNRAS
Here comes everything - managing media, text, audio and electronic versioning
Creators: name: Soloman, Madi Weland
Publisher: name: Zenodo
Year: 2009
Subjects: subject: https://iskouk.org/subjects/3EUZDJS5
subject: https://iskouk.org/subjects/AX075AC1
subject: https://iskouk.org/subjects/W3ENEJYW
subject: https://iskouk.org/subjects/L0C9LMAF

description: Case studies in managing multimedia at Disney and Pearson including cataloguing for interoperability, media management for physical and digital, electronic versioning, intellectual property and rights management.
description: Images subject to copyright have been removed.
An Invitation from Plato: A Philosophical Journey to Knowledge
Creators: name: Oki-Suga, Mai
Publisher: name: Edition Topoi
Year: 2018

description: Das Lesen eines philosophischen Buches kann in einem gewissen Sinne mit einer Wegbeschreitung oder einer Reise zum Wissen gleichgesetzt werden. Platon, der sich dieses Verhältnisses zwischen Reise und Philosophie bewusst war, verfasste seine Dialoge, als ob sie Reisen zum Wissen wären. Diese Abhandlung behandelt das Begriffspaar Aufstieg und Abstieg, das als symbolische Bewegung der philosophischen Reise in Platons Politeia mehrmals verwendet wird. Mit diesem Motiv stellt Platon die Reise der Seele auf unterschiedliche Weisen dar. Meine Untersuchung zeigt eine Lese­weise, mit der Platons Dialog als philosophische Reise verstanden werden kann, die zwar von Platon oder der Figur Sokrates unternommen wird, gleichzeitig jedoch den Leser in die philoso­phischen Fragestellungen miteinbezieht.
Calcium silicate hydrate—in-situ development of the silicate structure followed by infrared spectroscopy
Creators: name: John, Elisabeth
name: Stephan, Dietmar
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 546 Anorganische Chemie
subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: calcium silicate hydrate
subject: fourier transform infrared spectroscopy
subject: polymers/polymerization
subject: structure

description: In the current study, the development of the silicate structure of synthetic calcium silicate hydrates with different calcium contents was followed by in-situ infrared (IR) spectroscopy and correlated to the in-situ phase development evaluated by X-ray diffraction (XRD). A baseline correction method initially developed for X-ray diffractograms was successfully adapted for the complex background of the fingerprint region in in-situ IR, which significantly contributed to signal quality and reproducibility. The development of separate silicate infrared bands could be monitored over 24 h of reaction. These bands could be assigned to oligomeric and dimeric species based on their time and stoichiometry-dependent development. It was clearly shown that the main peak of the dimeric silicate species was overlooked in the literature. The correlation of time-dependent events to in-situ XRD revealed that changes in the unit cell of calcium silicate hydrate are related to silicate polymerization. The results were compared to 29Si-MAS-NMR, which highlighted the benefits of in-situ IR spectroscopy.
Decolonization of Arctic Library and Archives Metadata (DALAM) Thematic Network Update: April 2023
Creators: Campbell, Sandy
Polar Libraries Colloquy
Publisher: name: University of Alberta Library
Year: 2023

This is a published update of the activities of the University of the Arctic Thematic Network on Decolonization of Arctic Library and Archives Metadata

(DALAM), issued months prior to the final endorsement of the network by University of the Arctic.
Anomalous magneto-structural behavior of MnBi explained: a path towards an improved permanent magnet
Creators: name: Zarkevich, N. A.
name: Wang, L. -L.
name: Johnson, D. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences
subject: I.6.6
subject: 82-08

description: Low-temperature MnBi (hexagonal NiAs phase) exhibits anomalies in the lattice constants (a, c) and bulk elastic modulus (B) below 100 K, spin reorientation and magnetic susceptibility maximum near 90 K, and, importantly for high-temperature magnetic applications, an increasing coercivity (unique to MnBi) above 180 K. We calculate the total energy and magneto-anisotropy energy (MAE) versus (a, c) using DFT+U methods. We reproduce and explain all the above anomalies. We predict that coercivity and MAE increase due to increasing a, suggesting means to improve MnBi permanent magnets.
description: 4 pages, 5 figures
Analysis of a model for the dynamics of microswimmer suspensions
Creators: name: Emmrich, Etienne
name: Geuter, Lukas
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 510 Mathematik
subject: active fluid
subject: existence
subject: relative energy
subject: weak solution
subject: weak–strong uniqueness

description: In this paper, a model that was recently derived in Reinken et al. to describe the dynamics of microswimmer suspensions is studied. In particular, the global existence of weak solutions, their weak–strong uniqueness, and a connection to a different model that was proposed in Wensink et al. is shown.
A precise blue-optical transmission spectrum from the ground: Evidence for haze in the atmosphere of WASP-74b
Creators: name: Spyratos, Petros
name: Nikolov, Nikolay K.
name: Constantinou, Savvas
name: Southworth, John
name: Madhusudhan, Nikku
name: Sedaghati, Elyar
name: Ehrenreich, David
name: Mancini, Luigi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report transmission spectroscopy of the bloated hot Jupiter WASP-74b in the wavelength range from 4000 to 6200 Å. We observe two transit events with the Very Large Telescope FOcal Reducer and Spectrograph (VLT FORS2) and present a new method to measure the exoplanet transit depth as a function of wavelength. The new method removes the need for a reference star in correcting the spectroscopic light curves for the impact of atmospheric extinction. It also provides improved precision, compared to other techniques, reaching an average transit depth uncertainty of 211 ppm for a solar-type star of V=9.8 mag and over wavelength bins of 80 Å. The VLT transmission spectrum is analysed both individually and in combination with published data from Hubble Space Telescope (HST) and Spitzer. The spectrum is found to exhibit a mostly featureless slope and equilibrium chemistry retrievals with PLATON favour hazes in the upper atmosphere of the exoplanet. Free chemistry retrievals with AURA further support the presence of hazes. While additional constraints are possible depending on the choice of atmospheric model, they are not robust and may be influenced by residual systematics in the data sets. Our results demonstrate the utility of new techniques in the analysis of optical, ground-based spectroscopic data and can be highly complementary to follow-up observations in the infrared with JWST.
description: 18 pages, 12 figures, 4 tables, Accepted for publication in MNRAS
Direct sums of trace maps and self-adjoint extensions
Creators: name: Posilicano, Andrea
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We give a simple criterion so that a countable infinite direct sum of trace (evaluation) maps is a trace map. An application to the theory of self-adjoint extensions of direct sums of symmetric operators is provided; this gives an alternative approach to results recently obtained by Malamud-Neidhardt and Kostenko-Malamud using regularized direct sums of boundary triplets.
description: Final version. To appear in: S. Albeverio (ed.), Singular Perturbation Theory, Analysis, Geometry, and Stochastic, special issue of Arab. J. Math. (Springer)
Optimal investment for retail investors
Creators: name: Belak, Christoph
name: Mich, Lukas
name: Seifried, Frank T.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 510 Mathematik
subject: portfolio optimization
subject: transaction costs
subject: retail investor

description: We study optimal portfolio decisions for a retail investor that faces a strictly positive transaction cost in a classical Black‐Scholes market. We provide a construction of optimal trading strategies and characterize the value function as the unique viscosity solution of the associated quasi‐variational inequalities. Moreover, we numerically investigate the optimal trading regions for a variety of real‐world cost structures faced by retail investors. We find that the cost structure has a strong effect on the qualitative shape of the no‐trading region and optimal strategies.
Philo’s De migratione Abrahami: The Soul’s Journey of Self-Knowledge as Criticism of Stoic oikeiôsis
Creators: name: Joosse, Albert
Publisher: name: Edition Topoi
Year: 2018

description: In diesem Aufsatz soll gezeigt werden, dass die Interpretation der Reise des Abraham von Chaldaea nach Palästina im Werk Philons von Alexandrien implizit eine Kritik der stoischen Oikeiôsislehre darstellt. Das Bild der Reise ermöglicht es Philon, seine Vorstellungen über Selbsterkenntnis als Alternative zur stoischen Theorie der ethischen Entwicklung zu formulieren. Durch seine implizite Auseinandersetzung legt Philon nahe, dass die stoischeTheorie sich in eine falsche Richtung entwickelt hat; zu immanent bleibt; und einen Endzustand eines Prozesses annimmt, der kein Ende haben kann.
Superfluid Breakdown and Multiple Roton Gaps in Spin-Orbit Coupled Bose-Einstein Condensates on an Optical Lattice
Creators: name: Toniolo, Daniele
name: Linder, Jacob
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the superfluid phases of a Rashba spin-orbit coupled Bose-Einstein condensate residing on a two dimensional square optical lattice in the presence of an effective Zeeman field $Ω$. At a critical value $Ω=Ω_c$, the single-particle spectrum $ E_k $ changes from having a set of four degenerate minima to a single minimum at $k=0$, corresponding to condensation at finite or zero momentum, respectively. We describe this quantum phase transition and the symmetry breaking of the condensate phases. We use the Bogoliubov theory to treat the superfluid phases and determine the phase diagram, the excitation spectrum and the sound velocity of the phonon excitations. A novel dynamically unstable superfluid regime occurring when $Ω$ is close to $Ω_c$ is analytically identified and the behavior of the condensate quantum depletion is discussed. Moreover, we show that there are two types of roton excitations occurring in the $Ω
description: 4 pages, 2 figures, revised version. Accepted for publication in Phys. Rev. A Rapid Communications
Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet
Creators: name: Beckett, Alexander
name: Morris, Simon L.
name: Fumagalli, Michele
name: Tejos, Nicolas
name: Jannuzi, Buell
name: Cantalupo, Sebastiano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine to what extent disk and outflow models can reproduce observations of H I gas within a few virial radii of galaxies in pairs and groups. Using highly-sensitive HST/COS and FOS spectra of the Q0107 quasar triplet covering Ly$α$ for z$\lesssim$1, as well as a deep galaxy redshift survey including VIMOS, DEIMOS, GMOS and MUSE data, we test simple disk and outflow models against the H I absorption along three lines-of-sight (separated by 200-500 kpc) through nine galaxy groups in this field. These can be compared with our previous results in which these models can often be fit to the absorption around isolated galaxies. Our models can reproduce $\approx$ 75$\%$ of the 28 identified absorption components within 500 km/s of a group galaxy, so most of the H I around groups is consistent with a superposition of the CGM of the individual galaxies. Gas stripped in interactions between galaxies may be a plausible explanation for some of the remaining absorption, but neither the galaxy images nor the galaxy and absorber kinematics provide clear evidence of such stripped material, and these unexplained absorbers do not preferentially occur around close pairs of galaxies. We find H I column densities typically higher than at similar impact parameters around isolated galaxies ($\approx$ 2.5$σ$), as well as more frequent detections of O VI than around isolated galaxies (30$\%$ of sightlines to 7$\%$).
description: 33 pages, 15 figures (main text 22 pages, 9 figures). Accepted for publication in MNRAS
On the Observability of Recurrent Nova Super-Remnants
Creators: name: Healy-Kalesh, M. W.
name: Darnley, M. J.
name: Harvey, E. J.
name: Copperwheat, C. M.
name: James, P. A.
name: Andersson, T.
name: Henze, M.
name: O'Brien, T. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nova super-remnant (NSR) surrounding M31N 2008-12a (12a), the annually erupting recurrent nova (RN), is the only known example of this phenomenon. As this structure has grown as a result of frequent eruptions from 12a, we might expect to see NSRs around other RNe; this would confirm the RN--NSR association and strengthen the connection between novae and type Ia supernovae (SN Ia) as NSRs centered on SN Ia provide a lasting, unequivocal signpost to the single degenerate progenitor type of that explosion. The only previous NSR simulation used identical eruptions from a static white dwarf (WD). In this Paper, we simulate the growth of NSRs alongside the natural growth/erosion of the central WD, within a range of environments, accretion rates, WD temperatures, and initial WD masses. The subsequent evolving eruptions create dynamic NSRs tens of parsecs in radius comprising a low-density cavity, bordered by a hot ejecta pile-up region, and surrounded by a cool high-density, thin, shell. Higher density environments restrict NSR size, as do higher accretion rates, whereas the WD temperature and initial mass have less impact. NSRs form around growing or eroding WDs, indicating that NSRs also exist around old novae with low-mass WDs. Observables such as X-ray and H$α$ emission from the modelled NSRs are derived to aid searches for more examples; only NSRs around high accretion rate novae will currently be observable. The observed properties of the 12a NSR can be reproduced when considering both the dynamically grown NSR and photoionisation by the nova system.
description: 20 pages, 20 figures; Accepted for publication in Monthly Notices of the Royal Astronomical Society. For the animation in Figure 4, see https://www.dropbox.com/s/7a6zbu4eyv6kv8x/coolRun1.mp4?dl=0
Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices
Creators: name: Pal, Biplab
name: Chakrabarti, Arunava
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that a discrete tight-binding model representing either a random or a quasiperiodic array of bonds, can have the entire energy spectrum or a substantial part of it absolutely continuous, populated by extended eigenfunctions only, when atomic sites are coupled to the lattice locally, or non-locally from one side. The event can be fine-tuned by controlling only the host-adatom coupling in one case, while in two other cases cited here an additional external magnetic field is necessary. The delocalization of electronic states for the group of systems presented here is sensitive to a subtle correlation between the numerical values of the Hamiltonian parameters - a fact that is not common in the conventional cases of Anderson localization. Our results are analytically exact, and supported by numerical evaluation of the density of states and electronic transmission coefficient.
description: 11 pages, 8 figures, revised version
Finding Identities on the Way to Rome
Creators: name: Fascione, Sara
Publisher: name: Edition Topoi
Year: 2018

description: Das Thema der Reise ist im ersten Buch der Briefe von Sidonius Apollinaris von zentraler Bedeutung. Es zeigt nicht nur eine Möglichkeit des persönlichen Wachstums auf, sondern auch den Weg, der zu den Grundlagen der Romanitas führt. In diesem Sinne gestalte die peregrinatio das Leben der Reisenden: Der in Lyon geborene Sidonius Apollinaris wird auf dem Weg nach Rom wirklich Römer (Sidon. Epist. 1.5); Eutropius hingegen, der beschließt in Gallien zu bleiben, lehnt seine ihm innewohnende kulturelle Identität ab und wird somit zum Ausländer (peregrinus) im eigenen Land (Sidon. Epist. 1.6).
Characterizing the nucleus of comet 162P/Siding Spring using ground-based photometry
Creators: name: Donaldson, Abbie
name: Kokotanekova, Rosita
name: Rożek, Agata
name: Snodgrass, Colin
name: Gardener, Daniel
name: Green, Simon F.
name: Masoumzadeh, Nafiseh
name: Robinson, James
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Comet 162P/Siding Spring is a large Jupiter-family comet with extensive archival lightcurve data. We report new r-band nucleus lightcurves for this comet, acquired in 2018, 2021 and 2022. With the addition of these lightcurves, the phase angles at which the nucleus has been observed range from $0.39^\circ$ to $16.33^\circ$. We absolutely-calibrate the comet lightcurves to r-band Pan-STARRS 1 magnitudes, and use these lightcurves to create a convex shape model of the nucleus by convex lightcurve inversion. The best-fitting shape model for 162P has axis ratios $a/b = 1.56$ and $b/c = 2.33$, sidereal period $P = 32.864\pm0.001$ h, and a rotation pole oriented towards ecliptic longitude $λ_E = 118^\circ \pm 26^\circ$ and latitude $β_E=-50^\circ\pm21^\circ$. We constrain the possible nucleus elongation to lie within $1.4 < a/b < 2.0$ and discuss tentative evidence that 162P may have a bilobed structure. Using the shape model to correct the lightcurves for rotational effects, we derive a linear phase function with slope $β=0.051\pm0.002$ mag deg$^{-1}$ and intercept $H_r(1,1,0) = 13.86 \pm 0.02$ for 162P. We find no evidence that the nucleus exhibited an opposition surge at phase angles down to 0.39$^\circ$. The challenges associated with modelling the shapes of comet nuclei from lightcurves are highlighted, and we comment on the extent to which we anticipate that LSST will alleviate these challenges in the coming decade.
description: 14 pages, 10 figures, accepted for publication in MNRAS
Homer’s Odyssey in the Hands of its Allegorists: Many Paths to Explain the Cosmos
Creators: name: Safari Grey
Publisher: name: Edition Topoi
Year: 2018

description: Die allegorische exegetische Tradition war wohl die populärste Form der Literaturkritik in der Antike. Unter den antiken Allegorien begegnen wir einer Vielzahl von Namen und philosophischen Hinter­gründen, die von Pherecydes von Syros bis zu Proclus der Nachfolgerreichen. Viele dieser Autoren glaubten, Homers Epen enthüllten philosophische Lehren durch Hyponoie oder ,Unter­schätzung‘. In dieser Tradition lag der Fokus auf kosmologischen, kosmogonischen und theologischen Fragen, die trotz ihrer philosophischen Hintergründe eine Vielzahl von Kommentatoren anzogen. Es ist die Absicht dieses Artikels, auf zwei Autoren aufmerksam zu machen: Heraklit und Porphyr von Tyrus. Das vorliegende Werk soll zudem zeigen, dass die Tradition der kosmischen allegorischen Exegese in der modernen Wissenschaft noch immer praktiziert wird.
The Wanderer, the Philosopher and the Exegete
Creators: name: Lovato, Valeria Flavia
Publisher: name: Edition Topoi
Year: 2018

description: Der vorliegende Artikel befasst sich mit der Rezeption der Odyssee im Byzantinischen Reich des 12. Jahrhunderts. Ausgehend von den Interpretationen Homers durch Eusthatius von Thessaloniki und John Tzetzes zeige ich, dass die Verbindung zwischen Reisen und Wissen im Zentrum der intellek­tuellen Debatten der Epoche stand. Die Auseinandersetzung mit dieser traditionell wichtigen Thematik erlaubte es namhaften byzantinischen Gelehrten ihren Überzeugungen in wichtigen Fragen wie der Definition der Philosophie Ausdruck zu verleihen. Darüber hinaus bat sie ihnen die Möglich­keit, ihre Auffassung Homers und der eigenen Tätigkeit als Exegeten Homers zu erläutern.
Multiple percolation transitions in a configuration model of network of networks
Creators: name: Bianconi, Ginestra
name: Dorogovtsev, Sergey N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Recently much attention has been paid to the study of the robustness of interdependent and multiplex networks and, in particular, networks of networks. The robustness of interdependent networks can be evaluated by the size of a mutually connected component when a fraction of nodes have been removed from these networks. Here we characterize the emergence of the mutually connected component in a network of networks in which every node of a network (layer) $α$ is connected with $q_α$ randomly chosen replicas in some other networks and is interdependent of these nodes with probability $r$. We find that when the superdegrees $q_α$ of different layers in the network of networks are distributed heterogeneously, multiple percolation phase transition can occur, and depending on the value of $r$ these transition are continuous or discontinuous.
description: (11 pages, 4 figures)
Initial Flash and Spectral Formation of Type Ia Supernovae with An Envelope: Applications to Over-luminous SNe Ia
Creators: name: Maeda, Keiichi
name: Jiang, Ji-an
name: Doi, Mamoru
name: Kawabata, Miho
name: Shigeyama, Toshikazu
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Over-luminous type Ia supernovae (SNe Ia) show peculiar observational features, for which an explosion of a super-massive white dwarf (WD) beyond the classical Chandrasekhar-limiting mass has been suggested, largely based on their high luminosities and slow light-curve evolution. However, their observational features are diverse, with a few extremely peculiar features whose origins have not been clarified; strong and persisting C II lines, late-time accelerated luminosity decline and red spectra, and a sub-day time-scale initial flash clearly identified so far at least for three over-luminous SNe Ia. In the present work, we suggest a scenario that provides a unified solution to these peculiarities, through hydrodynamic and radiation transfer simulations together with analytical considerations; a C+O-rich envelope (~0.01 - 0.1 Msun) attached to an exploding WD. Strong C II lines are created within the shocked envelope. Dust formation is possible in the late phase, providing a sufficient optical depth thereafter. The range of the envelope mass considered here predicts an initial flash with time-scale of ~0.5 - 3 days. The scenario thus can explain some of the key diverse observational properties by a different amount of the envelope, but additional factors are also required; we argue that the envelope is distributed in a disc-like structure, and also the ejecta properties, e.g., the mass of the WD, plays a key role. Within the context of the hypothesized super-Chandrasekhar-mass WD scenario, we speculatively suggest a progenitor WD evolution including a spin-up accretion phase followed by a spin-down mass-ejection phase.
description: 11 pages, 5 figures, 1 table. Accepted for publication in MNRAS. Typos corrected and references updated
KOunt_databases_v1.tar
Creators: name: Mattock, Jennifer
name: Martínez-Álvaro, Marina
name: Roehe, Rainer
name: Watson, Mick
Publisher: name: figshare
Year: 2022
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 80301 Bioinformatics Software

description: Reference database for the KEGG Abundance tool KOunt
Randomized Graph States and their Entanglement Properties
Creators: name: Wu, Jun-Yi
name: Rossi, Matteo
name: Kampermann, Hermann
name: Severini, Simone
name: Kwek, Leong Chuan
name: Macchiavello, Chiara
name: Bruß, Dagmar
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a class of mixed multiqubit states, that corresponds to a randomized version of graph states. Such states arise when a graph state is prepared with noisy or imperfect controlled-Z gates. We study the entanglement features of these states by investigating both bipartite and genuine multipartite entanglement. Bipartite entanglement is studied via the concepts of connectedness and persistency, which are related to measurement based quantum computation. The presence of multipartite entanglement is instead revealed by the use of witness operators which are subsequently adapted to study nonlocal properties through the violation of suitable Bell inequalities. We also present results on the entanglement detection of particular randomized graph states, by deriving explicit thresholds for entanglement and nonlocality in terms of the noise parameter that characterizes the controlled-Z gates exploited for their generation. Finally, we propose a method to further improve the detection of genuine multipartite entanglement in this class of states.
description: This is the published version. We have added some text to clarify our results, corrected typos in references, and made some minor style modifications according to the journal
Assessing model-based carbon and oxygen abundance derivation from ultraviolet emission lines in AGNs
Creators: name: Pérez-Montero, Enrique
name: Amorín, Ricardo
name: Pérez-Díaz, Borja
name: Vílchez, José M.
name: García-Benito, Rubén
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an adapted version of the code HII-CHI-Mistry-UV (Pérez-Montero & Amorín 2017) to derive chemical abundances from emission lines in the ultraviolet, for use in narrow line regions (NLR) of Active Galactic Nuclei (AGN). We evaluate different ultraviolet emission line ratios and how different assumptions about the models, including the presence of dust grains, the shape of the incident spectral energy distribution, or the thickness of the gas envelope around the central source, may affect the final estimates as a function of the set of emission lines used. We compare our results with other published recipes for deriving abundances using the same emission lines and show that deriving the carbon-to-oxygen abundance ratio using CIII] $λ$ 1909 Å and OIII] $λ$ 1665 Å emission lines is a robust indicator of the metal content in AGN that is nearly independent of the model assumptions, similar to the case of star-forming regions. Moreover, we show that a prior determination of C/O allows for a much more precise determination of the total oxygen abundance using carbon UV lines, as opposed to assuming an arbitrary relationship between O/H and C/O, which can lead to non-negligible discrepancies.
description: Accepted for publication in MNRAS. 16 pages and 10 figures. Tables 2 and 3 will be completely available as supplementary data and submitted to CDS. These tables will be temporarily shared upon request
The Epoch of Reionization Window: I. Mathematical Formalism
Creators: name: Liu, Adrian
name: Parsons, Aaron R.
name: Trott, Cathryn M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The 21 cm line provides a powerful probe of astrophysics and cosmology at high redshifts, but unlocking the potential of this probe requires the robust mitigation of foreground contaminants that are typically several orders of magnitude brighter than the cosmological signal. Recent simulations and observations have shown that the smooth spectral structure of foregrounds combines with instrument chromaticity to contaminate a "wedge"-shaped region in cylindrical Fourier space. While previous efforts have explored the suppression of foregrounds within this wedge, as well as the avoidance of this highly contaminated region, all such efforts have neglected a rigorous examination of the error statistics associated with the wedge. Using a quadratic estimator formalism applied to the interferometric measurement equation, we provide a framework for such a rigorous analysis (incorporating a fully covariant treatment of errors). Additionally, we find that there are strong error correlations at high spatial wavenumbers that have so far been neglected in sensitivity derivations. These error correlations substantially degrade the sensitivity of arrays relying on contributions from long baselines, compared to what one would estimate assuming uncorrelated errors.
description: 24 pages, 7 figures; v3: Revised to match published PRD version. Fixed typos, added tables of variables, discussions/derivations window function width in k_perp, and discussion of the possibility of unsmooth foregrounds in response to referee comments. No changes to overall conclusions
Incomprehension en route to Jerusalem (Mk8:22–10:52)
Creators: name: Cilliers Breytenbach
Publisher: name: Edition Topoi
Year: 2018

description: Der zweite Teil des Markusevangeliums (8,22–10,52) ist eine Erzählung über die Reise Jesu und seiner Jünger vom Norden des Sees Genezareth nach Jerusalem im Süden. Auf dieser Reise folgen die Jünger Jesus und werden von ihm unterrichtet, aber sie verstehen seine Lehre nicht. Für die impli­zierte Zuhörerschaft werden die Erzählungen über das Unverständnis der Jünger zu einem negativen Beispiel dafür, wie man nicht auf Jesu Lehre reagieren sollte. Die Reise selbst wird zu einer Makro-Metapher, die erklärt, wie man Jesus folgen sollte
Pausanias’ Messenian Itinerary and the Journeys of the Past
Creators: name: Hawes, Greta
Publisher: name: Edition Topoi
Year: 2018

description: Messene war eine ungewöhnliche Polis. Gegründet in hellenistischer Zeit, war sie eine der wenigen großen Siedlungen auf dem griechischen Festland. Messenes Ansprüche auf eine kulturelle Vergan­genheit, die Maßstäbe setzte und in mythischen Zeiten wurzelte, konnten daher nicht auf bloßen Vermutungen über die Kontinuität des Wissens, das durch bürgerliche, kultische und kommunale Institutionen weitergegeben wurde, beruhen. Dieses Kapitel untersucht wie sich Pausanias in seiner Darstellung von Messene diesem Dilemma nähert (im vierten Buch seiner Periegesis), indem er Wissen sowohl zu einem Artefakt erklärt, das unverändert in Texten erhalten ist, als auch zu einem konzeptuellen Besitz, der durch Reisen erworben werden kann. Es soll gezeigt werden, dass gerade das Zusammenspieldieser beiden Wissensformen von größter Bedeutung für den Text ist, da Pausanias’ Periegesis selbst als ein festgeschriebenes Objekt verstanden werden kann, welches gleichwohl Gelegenheit bietet, vom hodologisch versierten Text-Reisenden eigenständig erkundet und erfahren zu werden.
A Study of GeV Gamma-ray Emission toward Supernova Remnant G51.26+0.11 and Its Molecular Environment
Creators: name: Zhong, Wen-Juan
name: Zhang, Xiao
name: Chen, Yang
name: Zhang, Qian-Qian
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We reanalyze the Fermi-LAT GeV $γ$-ray emission in the region of supernova remnant (SNR) G51.26+0.11 and investigate its interstellar molecular environment with the CO-line data. At GeV energies, based on 13.2 years of Fermi-LAT data, the extended $γ$-ray emission observed in this region is resolved into a uniform-disk source ('Src A') with a significance of 19.5$σ$ and a point source (4FGL J1924.3+1628) with a significance of 4.2$σ$ in 0.2$-$500 GeV. With an angular radius of $\sim$ 0.17$^°$, 'Src A' overlaps with SNR G51.26+0.11 significantly in the line of sight. On the other hand, the morphological coincidence between the SNR and the $\sim$ +54 km s$^{-1}$ molecular clouds (MCs) together with the asymmetric or broad $^{12}$CO line profiles near the SNR boundary provides evidence for the very likely SNR-MC interaction. The SNR-MC interaction and the HI absorption features indicate that SNR G51.26+0.11 is located at a kinematic distance of 6.2 $\pm$ 0.5 kpc. Combined with the results from the multi-wavelength analysis, the $γ$-ray emission of the SNR ('Src A') can be naturally explained by a hadronic model with a soft power-law proton spectrum of index $\sim$ 2.25.
description: 10 pages, 8 figures, accepted for publication in MNRAS
A Concurrent Pattern Calculus
Creators: name: Given-Wilson, Thomas
name: Gorla, Daniele
name: Jay, Barry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Concurrent pattern calculus (CPC) drives interaction between processes by comparing data structures, just as sequential pattern calculus drives computation. By generalising from pattern matching to pattern unification, interaction becomes symmetrical, with information flowing in both directions. CPC provides a natural language to express trade where information exchange is pivotal to interaction. The unification allows some patterns to be more discriminating than others; hence, the behavioural theory must take this aspect into account, so that bisimulation becomes subject to compatibility of patterns. Many popular process calculi can be encoded in CPC; this allows for a gain in expressiveness, formalised through encodings.
description: Logical Methods in Computer Science (2014)
Vectores de Xylella fastidiosa
Creators: name: Morente, Marina
name: Fereres, Alberto
Publisher: name: Zenodo
Year: 2017
Subjects: Cicadellinae, Cercopoidea, vector

description: La mayoría de los artrópodos vectores de patógenos de plantas son insectos y, dentro de este grupo, los hemípteros constituyen el orden con un mayor número de vectores de enfermedades (Harris y Maramorosch, 2013). Los hemípteros cuentan con un aparato bucal especializado que les permite penetrar en los tejidos de la planta sin ocasionarle ningún daño, lo que favorece la inoculación de patógenos evadiendo las barreras naturales de la epidermis. A diferencia de los virus de plantas, que dependen en su mayoría de un vector para transmitirse (Fereres y Raccah, 2015), la mayoría de los patógenos procariotas

no presentan este tipo de dependencia o, al menos, no es indispensable. Este no es el caso de Xylella fastidiosa (Wells et al.) y otras bacterias como los mollicutes, que necesitan un hospedador intermediario con el que mantienen una relación compleja (Purcell, 1982).
Study of central light distribution in nearby early-type galaxies hosting nuclear star clusters
Creators: name: Sruthi, K.
name: Ravikumar, C. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present analysis of 63 nearby ($<$ 44 Mpc) early-type galaxies hosting nuclear star clusters using the recently discovered parameter Central Intensity Ratio (CIR$_I$) determined from near-infra-red (3.6 $μ$m) observations with the Infra-red-array-camera of \emph{Spitzer} space telescope. The CIR$_I$, when combined with filters involving age and $B-K$ colour of host galaxies, helps identify two distinct classes of galaxies hosting nuclear star clusters. This is independently verified using Gaussian Mixture Model. CIR shows a positive trend with faint, low mass, and blue galaxies in the sample, while the opposite is true for bright, high mass, and red galaxies, albeit with large scatter. The variation of CIR$_I$ with central velocity dispersion, absolute B band magnitude, dynamical mass, and stellar mass of host galaxies suggests that the mass of nuclear star clusters increases with that of host galaxies, for faint, low mass, young and blue galaxies in the sample. In bright, high-mass, old and red galaxies, on the other hand, the evolution of nuclear star clusters appears complex, with no apparent trends.The analysis also reveals that redder galaxies ($B-K > 3.76$) are more likely to be dominated by the central black-hole than the nuclear star clusters, while for bluer galaxies ($B-K < 3.76$) in the sample the situation is quite opposite.
description: Accepted for publication in MNRAS
The stellar population responsible for a kiloparsec size superbubble seen in the JWST "phantom" images of NGC628
Creators: name: Mayya, Y. D.
name: Alzate, J. A.
name: Lomelí-Núñez, L.
name: Zaragoza-Cardiel, J.
name: Gómez-González, V. M. A.
name: Silich, S.
name: Fernández-Arenas, D.
name: Vega, O.
name: Ovando, P. A.
name: Rodríguez, L. H.
name: Rosa-González, D.
name: Luna, A.
name: Zamora-Avilés, M.
name: Rosales-Ortega, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We here study the multi-band properties of a kiloparsec-size superbubble in the late-type spiral galaxy NGC628. The superbubble is the largest of many holes seen in the early release images using JWST/MIRI filters that trace the Polycyclic Aromatic Hydrocarbon (PAH) emissions. The superbubble is located in the interarm region ~3 kpc from the galactic center in the south-east direction. The shell surrounding the superbubble is detected in HI, CO, and Halpha with an expansion velocity of 12 km/s, and contains as much as 2x10^7 Msun of mass in gas that is mostly in molecular form. We find a clear excess of blue, bright stars inside the bubble as compared to the surrounding disk on the HST/ACS images. These excess blue, bright stars are part of a stellar population of 10^5 Msun mass that is formed over the last 50 Myr in different star formation episodes, as determined from an analysis of color-magnitude diagrams using a Bayesian technique. The mechanical power injected by the massive stars of these populations is sufficient to provide the energy necessary for the expansion of the shell gas. Slow and steady, rather than violent, injection of energy is probably the reason for the maintenance of the shell structure over the kiloparsec scale. The expanding shell is currently the site for triggered star formation as inferred from the JWST 21 micron (F2100W filter) and the Halpha images.
description: 18 pages, Accepted for publication in MNRAS
Dispersion of Fermi arcs in Weyl semimetals and their evolutions to Dirac cones
Creators: name: Okugawa, Ryo
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study dispersions of Fermi arcs in the Weyl semimetal phase by constructing a simple effective model. We calculate how the surface Fermi-arc dispersions for the top- and bottom surfaces merge into the bulk Dirac cones in the Weyl semimetal at both ends of the arcs, and show that they have opposite velocities. This result is also confirmed by a calculation using a tight-binding model. Furthermore, by changing a parameter in the system while preserving time-reversal symmetry, we show that two Fermi arcs evolve into a surface Dirac cone when the system transits from the Weyl semimetal to the topological insulator phase. We also demonstrate that choices of surface terminations affect the pairing of Weyl nodes, from which the Fermi arcs are formed.
description: 8 pages, 5 figures