cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Baier, Th. (Hrsg., 2017): Camerarius Polyhistor. Wissensvermittlung im deutschen Humanismus
Creators: name: Ullrich, Heiko
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Baier, Th. (Hrsg., 2017): Camerarius Polyhistor. Wissensvermittlung im deutschen Humanismus (NeoLatina 27), Tübingen: Narr, 364 S. (ISBN 978-3-8233-8109-9).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Exact 1/N expansion of Wilson loop correlators in $\mathcal{N}=4$ Super-Yang-Mills theory
Creators: name: Mück, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Supersymmetric circular Wilson loops in $\mathcal{N}=4$ Super-Yang-Mills theory are discussed starting from their Gaussian matrix model representations. Previous results on the generating functions of Wilson loops are reviewed and extended to the more general case of two different loop contours, which is necessary to discuss coincident loops with opposite orientations. A combinatorial formula representing the connected correlators of multiply wound Wilson loops in terms of the matrix model solution is derived. Two new results are obtained on the expectation value of the circular Wilson loop, the expansion of which into a series in $1/N$ and to all orders in the 't~Hooft coupling $λ$ was derived by Drukker and Gross about twenty years ago. The connected correlators of two multiply wound Wilson loops with arbitrary winding numbers are calculated as a series in $1/N$. The coefficient functions are derived not only as power series in $λ$, but also to all orders in $λ$ by expressing them in terms of the coefficients of the Drukker and Gross series. This provides an efficient way to calculate the $1/N$ series, which can probably be generalized to higher-point correlators.
description: 45 pages, 3 tables, v2: typos corrected and reference update
Sauer, J. (Hrsg.) (2020): Augustinus: De civitate Dei. Fachwissenschaftliche und fachdidaktische Zugänge
Creators: name: Wissemann, Michael
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Sauer, J. (Hrsg.) (2020): Augustinus: De civitate Dei. Fachwissenschaftliche und fachdidaktische Zugänge, Acta Didactica Classica Bd. 2, Heidelberg, Propylaeum Fachinformationsdienst Altertumswissenschaften (www.propylaeum.de, urn: urn:nbn:de:bsz:16-propylaeum-ebook-594-5), 198 S. (ISBN: 978-3-948465-10-).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Vacuum Stability vs. Positivity in Real Singlet Scalar Extension of the Standard Model
Creators: name: Ghorbani, Parsa
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We assume a generic real singlet scalar extension of the Standard Model living in the vacuum $(v,w)$ at the electroweak scale with $v=246$ GeV and $w$ being respectively the Higgs and the singlet scalar vacuum expectation values. By requiring {\it absolute} vacuum stability for the vacuum $(v,w)$, the positivity condition and the perturbativity up to the Planck scale, we show that the viable space of parameters in the model is strongly constrained for various singlet scalar vacuum expectation values $w=0.1, 1, 10, 100$ TeV. Also, it turns out that the singlet scalar mass can be from a few GeV up to less than TeV.
description: 12 pages, 2 tables, 4 figures; references added
Bader, B. (Hrsg. und Komm.) (2019): Josephus Latinus. De Bello Judaico, Buch 1
Creators: name: Wissemann, Michael
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Bader, B. (Hrsg. und Komm.) (2019): Josephus Latinus. De Bello Judaico, Buch 1, Palingenesia Bd. 119, Stuttgart,Franz Steiner Verlag, 256 S., ISBN 978-3-515-12430-0.
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Backhaus, M.: Mord(s)bilder – Aufzählungen von Gewalt bei Seneca und Lucan
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Backhaus, M.: Mord(s)bilder – Aufzählungen von Gewalt bei Seneca und Lucan. Millenium-Studien, Band 76, Walter de Gruyter Berlin/Boston 2019, 329 S. (ISBN: 978-3-11-063597-3).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Thurn, A. (2018): Rufmord in der späten römischen Republik. Charakterbezogene Diffamierungsstrategien in Ciceros Reden und Briefen
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Thurn, A. (2018): Rufmord in der späten römischen Republik. Charakterbezogene Diffamierungsstrategien in Ciceros Reden und Briefen, Berlin/New York, De Gruyter, EUR 99,95, 321 S. (ISBN 978-3-11-059848-3).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
International Conference on Economics, Business, Tourism & Social Sciences (ICEBTS 2022), Malacca (Malaysia), February 18, 2022
Creators: name: IIARP Conference
Publisher: name: F1000 Research Limited
Year: 2022

description: International Conference on Economics, Business, Tourism & Social Sciences is the premier meeting place for researchers, professors, students and professionals of different areas. Now the conference is extended across many regions of the world. This conference intends to bring together and provide a common platform to accumulate and exchange the innovative ideas, latest knowledge and unique experiences for the benefits of researchers, professors, industrialists, academicians, students, and other participants.

 Some of the participants were not able to join us live but you can go to our YouTube channel to see their presentations. YouTube Channel Link
Zimmermann, B. (2020): Homers Odyssee. Dichter, Helden und Geschichte
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Zimmermann, B. (2020): Homers Odyssee. Dichter, Helden und Geschichte., München, C. H. Beck, 128 S. (ISBN: 978-3-406-75022-9).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Efficient Simulations of Early Structure Formation and Reionization
Creators: name: Mesinger, Andrei
name: Furlanetto, Steven
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a method to construct semi-numerical ``simulations'', which can efficiently generate realizations of halo distributions and ionization maps at high redshifts. Our procedure combines an excursion-set approach with first-order Lagrangian perturbation theory and operates directly on the linear density and velocity fields. As such, the achievable dynamic range with our algorithm surpasses the current practical limit of N-body codes by orders of magnitude. This is particularly significant in studies of reionization, where the dynamic range is the principal limiting factor. We test our halo-finding and HII bubble-finding algorithms independently against N-body simulations with radiative transfer and obtain excellent agreement. We compute the size distributions of ionized and neutral regions in our maps. We find even larger ionized bubbles than do purely analytic models at the same volume-weighted mean hydrogen neutral fraction. We also generate maps and power spectra of 21-cm brightness temperature fluctuations, which for the first time include corrections due to gas bulk velocities. We find that velocities widen the tails of the temperature distributions and increase small-scale power, though these effects quickly diminish as reionization progresses. We also include some preliminary results from a simulation run with the largest dynamic range to date: a 250 Mpc box that resolves halos with masses M >~ 2.2 x10^8 M_sun. We show that accurately modeling the late stages of reionization requires such large scales. The speed and dynamic range provided by our semi-numerical approach will be extremely useful in the modeling of early structure formation and reionization.
description: 13 pages, 10 figures; ApJ submitted
title: Analyzing Longitudinal Aging Studies within an Interoperability Environment: The NACDA Data Portal
title: NACDA Virtual Workshop - GSA November 2021
titleType: AlternativeTitle
Creators: name: Lavender, Kathryn
name: McNally, James
name: Radler, Barry
name: Phillips, John
name: Iverson, Jeremy
Publisher: name: My University
Year: 2021
Subjects: subject: data sharing, aging, workshop, DDI, NIA, NACDA, GSA, Colectica
subject: Statistics and Numeric Data
subject: Social Sciences

description: This workshop included 4 sessions: NIA priorities by John Phillips; Understanding and Using MIDUS by Barry Radler; Analyzing Longitudinal Aging Studies within an Interoperability Environment: The NACDA Data Portal by James McNally and Kathryn Lavender; Introduction to Colectica by Jeremy Iverson. The main themes covered are: (Complex) Longitudinal studies of older populations; New approaches to organize and present longitudinal data; Cross-study comparisons at the concept and variable level; Why comparing across longitudinal datasets (within or across series) is important. There is a PDF version of the presentation for each session in this record.
description: With the growing complexity of longitudinal studies of older populations, new approaches are emerging to organize and present these data to facilitate the research process. Increasingly, researchers are interested in multi-wave studies presented as unified analysis files rather than a series of cross-sections, the popularity of the RAND HRS being one example. Another area of interest is interoperability, allowing the comparison of different studies across variables and themes. The workshop will illustrate the NACDA Data Portal using the MIDUS and NSHAP studies as examples and external portals such as NHATS to explore interoperability research frameworks. The use of data organized into merged across-wave studies will enhance all researchers' ability to successfully employ longitudinal analysis files, identify variables of interest, and create customized analysis files for download and further analysis. NACDA is currently the only organization offering this capacity within a DDI Lifecycle framework.
Ammann, A. & Kofler, W. (Hrsg. und Übers.) (2020): Piccolomini, E. S.: Cinthia. Lateinisch/Deutsch
Creators: name: Ullrich, Heiko
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Ammann, A. & Kofler, W. (Hrsg. und Übers.) (2020): Piccolomini, E. S.: Cinthia. Lateinisch/Deutsch. Stuttgart, Reclam, 111 S. (ISBN 978-3-15-019687-8).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Stratigraphy, diagenesis and petroleum reservoir potential of the Cretaceous Haida, Skidegate and Honna formations, Queen Charlotte Islands, British Columbia
Creators: name: Fogarassy, Josef Anthony Steve
Publisher: name: University of British Columbia
Year: 2010

description: The middle to Upper Cretaceous Queen Charlotte Group is composed of mainly marine shales, sandstones and conglomerates which are subdivided into the Haida, Skidegate and Honna Formations. Total stratigraphic thickness of the Queen Charlotte Group is up to 1700 m. Sandstone and conglomerate dominate the succession and offer some petroleum reservoir potential. The Haida Formation (Albian) is a fining upwards, transgressive succession, which rests unconformably on older rocks. It consists of a basal planar and trough cross-stratified, pebbly sandstone to granule conglomerate unit up to 190 m thick interpreted as fluvial deposits, overlain by 700 m or more of fine to very fine sandstone beds, individually 0.5 to 3 m thick, exhibiting bioturbation and hummocky cross-stratification. The Haida Formation grades upward into at least 200 m of concretionary shale of the Skidegate Formation (Cenomanian-Santonian). The Honna Formation (Coniacian-Santonian), which succeeds unconformably and probably also interfingers with the Skidegate Formation, is locally thicker than 800 m, and is dominated by clast supported pebble to cobble and occasionally boulder conglomerate. Conglomerate beds are sharp based, variably graded, and up to 5 m thick. The depositional environment of the Honna Formation was a marine fan-delta or submarine canyon and fan system passing upward to Cretaceous mudstones and rare subaerial volcanics. Primary grain composition, together with diagenesis, determine the reservoir potential of the Queen Charlotte Group. The pebbly basal part of the Haida Formation has the best reservoir potential, due to high quartz framework grain content which restricts precipitation of authigenic phases. Diagenesis of Queen Charlotte Group sandstones involved carbonate precipitation and dissolution, and the growth of iron-rich chlorite, trioctahedral smectite and mixed-layer phyllosilicates, creating a complex paragenetic sequence. Appreciable secondary porosity development, combined with preservation of intergranular primary porosity, results in visual porosity locally exceeding 15% in the basal Haida. Younger sandstones and conglomerates of the Queen Charlotte Group exhibit uniform diagenetic trends throughout all major outcrops on the Islands, and are generally considered poor reservoir prospects.
Weiß, Ph. & Wiener, C. (2020): Claudius Claudianus. Band I: Politische Gedichte. Carmina maiora. Lateinisch-deutsch
Creators: name: Döpp, Siegmar
Publisher: name: Forum Classicum
Year: 2021

description: Rezension zu: Weiß, Ph. & Wiener, C. (2020): Claudius Claudianus. Band I: Politische Gedichte. Carmina maiora. Lateinisch-deutsch. Herausgegeben und übersetzt [Sammlung Tusculum], Berlin/Boston, de Gruyter, 934 S. (ISBN: 978-3-11-060750-5).
description: Forum Classicum, Nr. 4 (2020): Forum Classicum
[Antike Welt, Heft 5-2020 / Circulare, Heft 3-2020 / Welt und Umwelt der Bibel Heft 4/2020 / Die Alten Sprachen im Unterricht Nr. 1/2020 / Latein und Griechisch in Baden-Württemberg Nr. 1-2020 / Latein und Griechisch in Berlin und Brandenburg, 3/2020]
Creators: name: Rabl, Josef
Publisher: name: Forum Classicum
Year: 2021

description: Forum Classicum, Nr. 4 (2020): Forum Classicum
Spectroscopy of Nine Cataclysmic Variable Stars
Creators: name: Sheets, H. A.
name: Thorstensen, J. R.
name: Peters, C. J.
name: Kapusta, A. B.
name: Taylor, C. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical spectroscopy of nine cataclysmic binary stars, mostly dwarf novae, obtained primarily to determine orbital periods Porb. The stars and their periods are LX And, 0.1509743(5) d; CZ Aql, 0.2005(6) d; LU Cam, 0.1499686(4) d; GZ Cnc, 0.0881(4) d; V632 Cyg, 0.06377(8) d; V1006 Cyg, 0.09903(9) d; BF Eri, 0.2708804(4) d; BI Ori, 0.1915(5) d; and FO Per, for which Porb is either 0.1467(4) or 0.1719(5) d. Several of the stars proved to be especially interesting. In BF Eri, we detect the absorption spectrum of a secondary star of spectral type K3 +- 1 subclass, which leads to a distance estimate of approximately 1 kpc. However, BF Eri has a large proper motion (100 mas/yr), and we have a preliminary parallax measurement that confirms the large proper motion and yields only an upper limit for the parallax. BF Eri's space velocity is evidently large, and it appears to belong to the halo population. In CZ Aql, the emission lines have strong wings that move with large velocity amplitude, suggesting a magnetically-channeled accretion flow. The orbital period of V1006 Cyg places it squarely within the 2- to 3-hour "gap" in the distribution of cataclysmic binary orbital periods.
description: 31 pages, 5 postscript and one PNG figure. Accepted for PASP
Many-body dynamical phase transition in quasi-periodic potential
Creators: name: Modak, Ranjan
name: Rakshit, Debraj
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Much has been learned regarding dynamical quantum phase transition (DQPT) due to sudden quenches across quantum critical points in traditional quantum systems. However, not much has been explored when a system undergoes a localization-delocalization transition. Here, we study one dimensional fermionic systems in presence of a quasi-periodic potential, which induces delocalization-localization transition even in 1D. We show signatures of DQPT in the many-body dynamics, when quenching is performed between phases belonging to different universality classes. We investigate how the non-analyticity in the dynamical free energy gets affected with filling fractions in the bare system and, further, study the fate of DQPT under interaction. Strikingly, whenever quenching is performed from the low-entangled localized phase to the high-entangled delocalized phase, our studies suggest an intimate relationship between DQPT and the rate of the entanglement growth -- Faster growths of entanglement entropy ensures quicker manifestation of the non-analiticties in the many-body dynamical free energy.
description: 8 pages, 5 figures
Grey-box models for wave loading prediction
Creators: name: Pitchforth, Daniel J
name: Rogers, Timothy J
name: Tygesen, Ulf T
name: Cross, Elizabeth J
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: The quantification of wave loading on offshore structures and components is a crucial element in the assessment of their useful remaining life. In many applications the well-known Morison's equation is employed to estimate the forcing from waves with assumed particle velocities and accelerations. This paper develops a grey-box modelling approach to improve the predictions of the force on structural members. A grey-box model intends to exploit the enhanced predictive capabilities of data-based modelling whilst retaining physical insight into the behaviour of the system; in the context of the work carried out here, this can be considered as physics-informed machine learning. There are a number of possible approaches to establish a grey-box model. This paper demonstrates two means of combining physics (white box) and data-based (black box) components; one where the model is a simple summation of the two components, the second where the white-box prediction is fed into the black box as an additional input. Here Morison's equation is used as the physics-based component in combination with a data-based Gaussian process NARX - a dynamic variant of the more well-known Gaussian process regression. Two key challenges with employing the GP-NARX formulation that are addressed here are the selection of appropriate lag terms and the proper treatment of uncertainty propagation within the dynamic GP. The best performing grey-box model, the residual modelling GP-NARX, was able to achieve a 29.13\% and 5.48\% relative reduction in NMSE over Morison's Equation and a black-box GP-NARX respectively, alongside significant benefits in extrapolative capabilities of the model, in circumstances of low dataset coverage.
A comment on instantons and their fermion zero modes in adjoint QCD_2
Creators: name: Smilga, Andrei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The adjoint 2-dimensional $QCD$ with the gauge group $SU(N)/Z_N$ admits topologically nontrivial gauge field configurations associated with nontrivial $π_1[SU(N)/Z_N] = Z_N$. The topological sectors are labelled by an integer $k=0,\ldots, N-1$. However, in contrast to $QED_2$ and $QCD_4$, this topology is not associated with an integral invariant like the magnetic flux or Pontryagin index. These instantons may admit fermion zero modes, but there is always an equal number of left-handed and right-handed modes, so that the Atiyah-Singer theorem, which determines in other cases the number of the modes, does not apply. The mod. 2 argument suggests that, for a generic gauge field configuration, there is either a single doublet of such zero modes or no modes whatsoever. However, the known solution of the Dirac problem for a wide class of gauge field configurations indicates the presence of $k(N-k)$ zero mode doublets in the topological sector $k$. In this note, we demonstrate in an explicit way that these modes are not robust under a generic enough deformation of the gauge background and confirm thereby the mod. 2 conjecture. The implications for the physics of this theory (screening vs. confinement issue) are briefly discussed.
description: minor changes, a reference added. 28 pages, 3 figures
Conservation laws for invariant functionals containing compositions
Creators: name: Frederico, Gastao S. F.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49K05; 49J05

description: The study of problems of the calculus of variations with compositions is a quite recent subject with origin in dynamical systems governed by chaotic maps. Available results are reduced to a generalized Euler-Lagrange equation that contains a new term involving inverse images of the minimizing trajectories. In this work we prove a generalization of the necessary optimality condition of DuBois-Reymond for variational problems with compositions. With the help of the new obtained condition, a Noether-type theorem is proved. An application of our main result is given to a problem appearing in the chaotic setting when one consider maps that are ergodic.
description: Accepted for an oral presentation at the 7th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2007), to be held in Pretoria, South Africa, 22-24 August, 2007
Hard X-ray emission from a Compton scattering corona in large black hole mass tidal disruption events
Creators: name: Mummery, Andrew
name: Balbus, Steven
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We extend the relativistic time-dependent thin-disc TDE model to describe nonthermal ($2-10$ keV) X-ray emission produced by the Compton up-scattering of thermal disc photons by a compact electron corona, developing analytical and numerical models of the evolving nonthermal X-ray light curves. In the simplest cases, these X-ray light curves follow power-law profiles in time. We suggest that TDE discs act in many respects as scaled-up versions of XRB discs, and that such discs should undergo state transitions into harder accretion states. XRB state transitions typically occur when the disc luminosity becomes roughly one percent of its Eddington value. We show that if the same is true for TDE discs then this, in turn, implies that TDEs with nonthermal X-ray spectra should come preferentially from large-mass black holes. The characteristic hard-state transition mass is $M_{\rm HS} \simeq 2\times10^7 M_\odot$. Hence, subpopulations of thermal and nonthermal X-ray TDEs should come from systematically different black hole masses. We demonstrate that the known populations of thermal and nonthermal X-ray TDEs do indeed come from different distributions of black hole masses. The null-hypothesis of identical black hole mass distributions is rejected by a two-sample Anderson-Darling test with a $p$-value $< 0.01$. Finally, we present a model for the X-ray rebrightening of TDEs at late times as they transition into the hard state. These models of evolving TDE light curves are the first to join both thermal and nonthermal X-ray components in a unified scenario.
description: v2: Small modifications to match accepted journal version, some references added. v1: 13 pages, 11 figures, 4 tables. Re-submitted after review to MNRAS, comments welcome
Displacement of the Sun from the Galactic Plane
Creators: name: Joshi, Yogesh C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out a comparative statistical study for the displacement of the Sun from the Galactic plane (z_\odot) following three different methods. The study has been done using a sample of 537 young open clusters (YOCs) with log(Age) < 8.5 lying within a heliocentric distance of 4 kpc and 2030 OB stars observed up to a distance of 1200 pc, all of them have distance information. We decompose the Gould Belt's member in a statistical sense before investigating the variation in the z_\odot estimation with different upper cut-off limits in the heliocentric distance and distance perpendicular to the Galactic plane. We found z_\odot varies in a range of ~ 13 - 20 pc from the analys is of YOCs and ~ 6 - 18 pc from the OB stars. A significant scatter in the z_\odot obtained due to different cut-off values is noticed for the OB stars although no such deviation is seen for the YOCs. We also determined scale heights of 56.9(+3.8)(-3.4} and 61.4(+2.7)(-2.4) pc for the distribution of YOCs and OB stars respectively.
description: 22 pages, 11 figures, 1 table, accepted for the publication in MNRAS
A maximum X-ray luminosity scale of disc-dominated tidal disruption events
Creators: name: Mummery, Andrew
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We develop a model describing the dynamical and observed properties of disc-dominated TDEs around black holes with the lowest masses ($M \lesssim {\rm few} \times 10^{6} M_\odot$). TDEs around black holes with the lowest masses are most likely to reach super-Eddington luminosities at early times in their evolution. By assuming that the amount of stellar debris which can form into a compact accretion disc is set dynamically by the Eddington luminosity, we make a number of interesting and testable predictions about the observed properties of bright soft-state X-ray TDEs and optically bright, X-ray dim TDEs. We argue that TDEs around black holes of the lowest masses will expel the vast majority of their gravitationally bound debris into a radiatively driven outflow. A large-mass outflow will obscure the innermost X-ray producing regions, leading to a population of low black hole mass TDEs which are only observed at optical \& UV energies. TDE discs evolving with bolometric luminosities comparable to their Eddington luminosity will have near constant (i.e. black hole mass independent) X-ray luminosities, of order $L_{\rm X, max} \equiv L_M \sim 10^{43} - 10^{44}$ erg/s. The range of luminosity values stems primarily from the range of allowed black hole spins. A similar X-ray luminosity limit exists for X-ray TDEs in the hard (Compton scattering dominated) state, and we therefore predict that the X-ray luminosity of the brightest X-ray TDEs will be at the scale $L_M(a) \sim 10^{43}-10^{44}$ erg/s, independent of black hole mass and accretion state. These predictions are in strong agreement with the properties of the existing population ($\sim 40$ sources) of observed TDEs.
description: v2: Minor changes to match published journal version, some references added and Figure 11 modified. v1: 11 pages, 15 figures, 1 table. Accepted for publication in MNRAS
$Cos(2ϕ_h)$ asymmetry in $J/ψ$ production in unpolarized $ep$ collision
Creators: name: Kishore, Raj
name: Mukherjee, Asmita
name: Siddiqah, Mariyah
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a calculation of the $cos (2 ϕ_h)$ asymmetry in $J/ψ$ production in electron-proton collision at the future electron-ion collider (EIC), a useful channel to probe the gluon TMDs. We calculate the asymmetry at next-to-leading order (NLO) in $α_s$ in the framework of generalized factorization. The dominating sub-process is $γ^* +g \rightarrow J/ψ+g$. The production of $J/ψ$ is calculated in the non-relativistic QCD(NRQCD) framework with the inclusion of both color singlet and color octet contributions. Numerical estimates of the $cos(2ϕ_h)$ asymmetry are given in the kinematical region to be accessed by the future EIC. The asymmetry depends on the parameterization of the gluon TMDs, as well as on the long distance matrix elements (LDMEs). We use both Gaussian-type parameterization and McLerran-Venugopalan model for the TMDs in the kinematical region of small-$x$, where the gluons play a dominant role. We obtain sizable asymmetry, which may be useful to probe the ratio of the linearly polarized and the unpolarized gluon distribution in the proton.
description: 25 pages, 7 figures
Correlation amplitude and entanglement entropy in random spin chains
Creators: name: Hoyos, J. A.
name: Vieira, André P.
name: Laflorencie, Nicolas
name: Miranda, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using strong-disorder renormalization group, numerical exact diagonalization, and quantum Monte Carlo methods, we revisit the random antiferromagnetic XXZ spin-1/2 chain focusing on the long-length and ground-state behavior of the average time-independent spin-spin correlation function C(l)=\upsilon l^{-η}. In addition to the well-known universal (disorder-independent) power-law exponent η=2, we find interesting universal features displayed by the prefactor \upsilon=\upsilon_o/3, if l is odd, and \upsilon=\upsilon_e/3, otherwise. Although \upsilon_o and \upsilon_e are nonuniversal (disorder dependent) and distinct in magnitude, the combination \upsilon_o + \upsilon_e = -1/4 is universal if C is computed along the symmetric (longitudinal) axis. The origin of the nonuniversalities of the prefactors is discussed in the renormalization-group framework where a solvable toy model is considered. Moreover, we relate the average correlation function with the average entanglement entropy, whose amplitude has been recently shown to be universal. The nonuniversalities of the prefactors are shown to contribute only to surface terms of the entropy. Finally, we discuss the experimental relevance of our results by computing the structure factor whose scaling properties, interestingly, depend on the correlation prefactors.
description: v1: 16 pages, 15 figures; v2: 17 pages, improved discussions and statistics, references added, published version
SIM PlanetQuest: The Most Promising Near-Term Technique to Detect, Find Masses, and Determine Three-Dimensional Orbits of Nearby Habitable Planets
Creators: name: Shao, M.
name: Marcy, G.
name: Unwin, S.
name: Allen, R.
name: Beichman, C.
name: Catanzarite, J.
name: Chaboyer, B.
name: Ciardi, D.
name: Edberg, S. J.
name: Gallagher, D.
name: Gould, A.
name: Henry, T.
name: Johnston, K.
name: Kulkarni, S.
name: Law, N.
name: Majewski, S.
name: Marr, J.
name: Law, N.
name: Pan, X.
name: Shaklan, S.
name: Shaya, E.
name: Tanner, A.
name: Tomsick, J.
name: Wehrle, A.
name: Worthey, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The past two Decadal Surveys in Astronomy and Astrophysics recommended the completion of a space-based interferometry mission, known today as SIM PlanetQuest, for its unique ability to detect and characterize nearby rocky planets (Bahcall 1991, McKee & Taylor 2001), as well as contributions to a broad range of problems in astrophysics. Numerous committees of the National Research Council as well as NASA Roadmaps have similarly highlighted SIM as the one technology that offers detection and characterization of rocky planets around nearby stars and which is technically ready. To date, SIM remains the only program with the capability of detecting and confirming rocky planets in the habitable zones of nearby solar-type stars. Moreover, SIM measures masses and three-dimensional orbits of habitable planets around nearby stars (within 25 pc); these are the only stars for which follow-up by other techniques is feasible, such as space-based spectroscopy, ground-based interferometry, and of course TPF.
description: ExoPTF white paper 8 pages, 2 figures
Internal rotation of Milky Way dwarf spheroidal satellites with $Gaia$ Early Data Release 3
Creators: name: Martínez-García, Alberto Manuel
name: del Pino, Andrés
name: Aparicio, Antonio
name: van der Marel, Roeland P.
name: Watkins, Laura L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of the kinematics of 14 satellites of the Milky Way (MW). We use proper motions (PMs) from the $Gaia$ Early Data Release 3 (EDR3) and line-of-sight velocities ($v_{\mathrm{los}}$) available in the literature to derive the systemic 3D motion of these systems. For six of them, namely the Carina, Draco, Fornax, Sculptor, Sextans, and Ursa Minor dwarf spheroidal galaxies (dSph), we study the internal kinematics projecting the stellar PMs into radial, $V_R$ (expansion/contraction), and tangential, $V_T$ (rotation), velocity components with respect to the centre of mass. We find significant rotation in the Carina ($|V_T| = 9.6 \pm 4.5 \ {\rm{km \ s^{-1}}}\>$), Fornax ($|V_T| = 2.8 \pm 1.3 \ {\rm{km \ s^{-1}}}\>$), and Sculptor ($|V_T| = 3.0 \pm 1.0 \ {\rm{km \ s^{-1}}}\>$) dSphs. Besides the Sagittarius dSph, these are the first measurements of internal rotation in the plane of the sky in the MW's classical dSphs. All galaxies except Carina show $|V_T| / σ_v < 1$. We find that slower rotators tend to show, on average, larger sky-projected ellipticity (as expected for a sample with random viewing angles) and are located at smaller Galactocentric distances (as expected for tidal stirring scenarios in which rotation is transformed into random motions as satellites sink into the parent halo). However, these trends are small and not statistically significant, indicating that rotation has not played a dominant role in shaping the 3D structure of these galaxies. Either tidal stirring had a weak impact on the evolution of these systems or it perturbed them with similar efficiency regardless of their current Galactocentric distance.
description: 12 pages, 5 figures, 3 tables. Accepted for publication in MNRAS
FSCI: Advancing Scholarly Communication
Creators: name: O'Donnell, Dan
Publisher: name: Zenodo
Year: 2021
Subjects: OIAR
Open Science

description: Part of the Bazaar, a showcase of different approaches to the mobilisation and dissemination of Open Science.
description: Primary funding was provided by the Social Science and Humanities Research Council of Canada (SSHRC), with addition financial and in-kind support provided by Eclac, FORCE11, and the Sloan Foundation through the Reimagining Educational Practices for Open (REPO) project.
Cavitylike strong coupling in macroscopic waveguide QED using three coupled qubits in the deep non-Markovian regime
Creators: name: Regidor, Sofia Arranz
name: Hughes, Stephen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a three qubit waveguide QED system to mimic the cavity-QED strong coupling regime of a probe qubit embedded in atom-like mirrors, which was realized in recent experiments. We then extend this system into the deep non-Markovian regime and demonstrate the profound role that retardation plays on the dressed resonances, allowing one to significantly improve the polariton lifetimes (by many orders of magnitude), tune the resonances, as well as realize Fano-like resonances and simultaneous coupling to multiple cavity modes. Exact Green function solutions are presented for the spectral resonances, and the quantum dynamics are simulated using matrix product states, where we demonstrate additional control of the cavity-QED system using chiral probe qubits.
IR observations of MS 1054-03: Star Formation and its Evolution in Rich Galaxy Clusters
Creators: name: Bai, Lei
name: Marcillac, Delphine
name: Rieke, George H.
name: Rieke, Marcia J.
name: Tran, Kim-Vy H.
name: Hinz, Joannah L.
name: Rudnick, Gregory
name: Kelly, Douglas M.
name: Blaylock, Myra
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the infrared (IR) properties of galaxies in the cluster MS 1054-03 at z=0.83 by combining MIPS 24 micron data with spectra of more than 400 galaxies and a very deep K-band selected catalog. 19 IR cluster members are selected spectroscopically, and an additional 15 are selected by their photometric redshifts. We derive the IR luminosity function of the cluster and find strong evolution compared to the similar-mass Coma cluster. The best fitting Schechter function gives L*_{IR}=11.49 +0.30/-0.29 L_sun with a fixed faint end slope, about one order of magnitude larger than that in Coma. The rate of evolution of the IR luminosity from Coma to MS 1054-03 is consistent with that found in field galaxies, and it suggests that some internal mechanism, e.g., the consumption of the gas fuel, is responsible for the general decline of the cosmic star formation rate (SFR) in different environments. The mass-normalized integrated SFR within 0.5R_200 in MS 1054-03 also shows evolution compared with other rich clusters at lower redshifts, but the trend is less conclusive if the mass selection effect is considered. A nonnegligible fraction (13%) of cluster members, are forming stars actively and the overdensity of IR galaxies is about 20 compared to the field. It is unlikely that clusters only passively accrete star forming galaxies from the surrounding fields and have their star formation quenched quickly afterward; instead, many cluster galaxies still have large amounts of gas, and their star formation may be enhanced by the interaction with the cluster.
description: 49 pages, 9 figures, accepted by ApJ
Charged particle motion around a magnetized Reissner-Nordström black hole
Creators: name: Shaymatov, Sanjar
name: Narzilloev, Bakhtiyor
name: Abdujabbarov, Ahmadjon
name: Bambi, Cosimo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the dynamics of neutral and charged test particles around axially symmetric magnetized black hole spacetime. We consider its electromagnetic field in the black hole vicinity and study its impact on the dynamics of test particles. We determine the radius of the innermost stable circular orbit (ISCO) for neutral and charged test particles and show that the combined effect of black hole electric charge and magnetic field strongly affects the ISCO radius, thus shrinking its values. We also show that the ISCO radius of positively (negatively) charged particle initially gets increased (decreased) and then gets radically altered with an increase in the value of both black hole electric charge and test particle charge. It turns out that the repulsive (attractive) Coulomb force dominates over the Lorentz force arising from the black hole magnetic field. Typically, black hole rotation causes axially symmetric spacetime case. Similarly, it turns out that a magnetized black hole solution also causes axially symmetric spacetime as a consequence of the presence of magnetic field. We study a degeneracy for the value of the ISCO between the Kerr and the magnetized Reissner-Nordström black hole geometries and show that the combined effects of black hole charge and magnetic field can be mimicked by Kerr spacetime with the spin parameter up to $a/M\approx 0.8$. Finally, we consider the center of mass energy of colliding particles and show that an increase in the values of black hole magnetic field and electric charge leads to high center of mass energy extracted by collision of two particles.
description: 14 pages, 10 figures, 2 tables
Sensor Networks with Random Links: Topology Design for Distributed Consensus
Creators: name: Kar, Soummya
name: Moura, Jose M. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In a sensor network, in practice, the communication among sensors is subject to:(1) errors or failures at random times; (3) costs; and(2) constraints since sensors and networks operate under scarce resources, such as power, data rate, or communication. The signal-to-noise ratio (SNR) is usually a main factor in determining the probability of error (or of communication failure) in a link. These probabilities are then a proxy for the SNR under which the links operate. The paper studies the problem of designing the topology, i.e., assigning the probabilities of reliable communication among sensors (or of link failures) to maximize the rate of convergence of average consensus, when the link communication costs are taken into account, and there is an overall communication budget constraint. To consider this problem, we address a number of preliminary issues: (1) model the network as a random topology; (2) establish necessary and sufficient conditions for mean square sense (mss) and almost sure (a.s.) convergence of average consensus when network links fail; and, in particular, (3) show that a necessary and sufficient condition for both mss and a.s. convergence is for the algebraic connectivity of the mean graph describing the network topology to be strictly positive. With these results, we formulate topology design, subject to random link failures and to a communication cost constraint, as a constrained convex optimization problem to which we apply semidefinite programming techniques. We show by an extensive numerical study that the optimal design improves significantly the convergence speed of the consensus algorithm and can achieve the asymptotic performance of a non-random network at a fraction of the communication cost.
description: Submitted to IEEE Transactions
Comparing Remnant Properties from Horizon Data and Asymptotic Data in Numerical Relativity
Creators: name: Iozzo, Dante A. B.
name: Khera, Neev
name: Stein, Leo C.
name: Mitman, Keefe
name: Boyle, Michael
name: Deppe, Nils
name: Hebert, Francois
name: Kidder, Lawrence E.
name: Moxon, Jordan
name: Pfeiffer, Harald P.
name: Scheel, Mark A.
name: Teukolsky, Saul A.
name: Throwe, William
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a new study of remnant black hole properties from 13 binary black hole systems, numerically evolved using the Spectral Einstein Code. The mass, spin, and recoil velocity of each remnant were determined quasi-locally from apparent horizon data and asymptotically from Bondi data $(h, ψ_4, ψ_3, ψ_2, ψ_1)$ computed at future null infinity using SpECTRE's Cauchy characteristic evolution. We compare these independent measurements of the remnant properties in the bulk and on the boundary of the spacetime, giving insight into how well asymptotic data are able to reproduce local properties of the remnant black hole in numerical relativity. We also discuss the theoretical framework for connecting horizon quantities to asymptotic quantities and how it relates to our results. This study recommends a simple improvement to the recoil velocities reported in the Simulating eXtreme Spacetimes waveform catalog, provides an improvement to future surrogate remnant models, and offers new analysis techniques for evaluating the physical accuracy of numerical simulations.
description: 14 pages, 4 figures, 1 table; published Physical Review D
Diffusive transport on networks with stochastic resetting to multiple nodes
Creators: name: González, Fernanda H.
name: Riascos, Alejandro P.
name: Boyer, Denis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the diffusive transport of Markovian random walks on arbitrary networks with stochastic resetting to multiple nodes. We deduce analytical expressions for the stationary occupation probability and for the mean and global first passage times. This general approach allows us to characterize the effect of resetting on the capacity of random walk strategies to reach a particular target or to explore the network. Our formalism holds for ergodic random walks and can be implemented from the spectral properties of the random walk without resetting, providing a tool to analyze the efficiency of search strategies with resetting to multiple nodes. We apply the methods developed here to the dynamics with two reset nodes and derive analytical results for normal random walks and Lévy flights on rings. We also explore the effect of resetting to multiple nodes on a comb graph, Lévy flights that visit specific locations in a continuous space, and the Google random walk strategy on regular networks.
description: 17 pages, 6 figures
Charges from Attractors
Creators: name: Suryanarayana, Nemani V.
name: Wapler, Matthias C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe how to recover the quantum numbers of extremal black holes from their near horizon geometries. This is achieved by constructing the gravitational Noether-Wald charges which can be used for non-extremal black holes as well. These charges are shown to be equivalent to the U(1) charges of appropriately dimensionally reduced solutions. Explicit derivations are provided for 10 dimensional type IIB supergravity and 5 dimensional minimal gauged supergravity, with illustrative examples for various black hole solutions. We also discuss how to derive the thermodynamic quantities and their relations explicitly in the extremal limit, from the point of view of the near-horizon geometry. We relate our results to the entropy function formalism.
description: 25 pages; references and comments added, typos fixed, minor changes to notation, minor clarifications in the discussions; final version published in CQG
Decentralized Self-Adaptive Systems: A Mapping Study
Creators: name: Quin, Federico
name: Weyns, Danny
name: Gheibi, Omid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: With the increasing ubiquity and scale of self-adaptive systems, there is a growing need to decentralize the functionality that realizes self-adaptation. Our focus is on architecture-based self-adaptive systems where one or more functions for monitoring, analyzing, planning, and executing are realized by multiple components that coordinate with one another. While some earlier studies have shed light on existing work on the decentralization of self-adaptive systems, there is currently no clear overview of the state of the art in decentralization of self-adaptive systems. Yet, having a precise view on the state of the art in decentralized self-adaptive systems is crucial for researchers to understand existing solutions and drive future research efforts. To address this gap, we conducted a mapping study. The study focused on papers published at 24 important venues that publish research on self-adaptation. The study focused on the motivations for choosing a decentralized approach to realize self-adaptation, the adaptation functions that are decentralized, the realization of the coordination, and the open challenges in the area.