cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Large deviations for systems with non-uniform structure
Creators: name: Climenhaga, Vaughn
name: Thompson, Daniel J.
name: Yamamoto, Kenichiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A50, 60F10, 37D35, 37D25, 37B10

description: We use a weak Gibbs property and a weak form of specification to derive level-2 large deviations principles for symbolic systems equipped with a large class of reference measures. This has applications to a broad class of symbolic systems, including $β$-shifts, $S$-gap shifts, and their factors. A crucial step in our approach is to prove a `horseshoe theorem' for these systems.
description: 32 pages. Exposition substantially revised from v1, and some minor mathematical changes. In particular, one of the hypothesis of our main theorem is simpler than in v1. To appear in Transactions of the American Mathematical Society
Efficient Learning of a Linear Dynamical System with Stability Guarantees
Creators: name: Jongeneel, Wouter
name: Sutter, Tobias
name: Kuhn, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We propose a principled method for projecting an arbitrary square matrix to the non-convex set of asymptotically stable matrices. Leveraging ideas from large deviations theory, we show that this projection is optimal in an information-theoretic sense and that it simply amounts to shifting the initial matrix by an optimal linear quadratic feedback gain, which can be computed exactly and highly efficiently by solving a standard linear quadratic regulator problem. The proposed approach allows us to learn the system matrix of a stable linear dynamical system from a single trajectory of correlated state observations. The resulting estimator is guaranteed to be stable and offers explicit statistical bounds on the estimation error.
description: Exposition has been updated
The Molecular-Gas Main Sequence and Schmidt-Kennicutt relation are fundamental, the Star-Forming Main Sequence is a (useful) byproduct
Creators: name: Baker, William M.
name: Maiolino, Roberto
name: Belfiore, Francesco
name: Bluck, Asa F. L.
name: Curti, Mirko
name: Wylezalek, Dominika
name: Bertemes, Caroline
name: Bothwell, M. S.
name: Lin, Lihwai
name: Thorp, Mallory
name: Pan, Hsi-An
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the relationship between the star formation rate (SFR), stellar mass ($M_*$) and molecular gas mass ($M_{H_2}$) for local star-forming galaxies. We further investigate these relationships for high-z (z=1-3) galaxies and for the hosts of a local sample of Active Galactic Nuclei (AGN). We explore which of these dependencies are intrinsic and which are an indirect by-product by employing partial correlation coefficients and random forest regression. We find that for local star-forming galaxies, high-z galaxies, and AGN host galaxies, the Schmidt-Kennicutt relation (SK, between $M_{H_2}$ and SFR), and the Molecular Gas Main Sequence (MGMS, between $M_{H_2}$ and $M_*$) are intrinsic primary relations, while the relationship between $M_*$ and SFR, i.e. the Star-Forming Main Sequence (SFMS), is an indirect by-product of the former two. Hence the Star-Forming Main Sequence is not a fundamental scaling relation for local or high-redshift galaxies. We find evidence for both the evolution of the MGMS and SK relation over cosmic time, where, at a given stellar mass, the higher the redshift, the greater the molecular gas mass and the star formation efficiency. We offer a parameterisation of both the MGMS and SK relation's evolution with redshift, showing how they combine to form the observed evolution of the SFMS. In addition, we find that the local AGN host galaxies follow an AGN-MGMS relation (as well as a AGN-SK relation), where the MGMS is offset to lower $M_{H_2}$ for a given $M_*$ compared to local SF galaxies.
description: 16 pages, 14 figures, Accepted for publication in MNRAS
The (amazing) Super-Maze
Creators: name: Bena, Iosif
name: Hampton, Shaun D.
name: Houppe, Anthony
name: Li, Yixuan
name: Toulikas, Dimitrios
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The entropy of the three-charge NS5-F1-P black hole in Type IIA string theory comes from the breaking of $N_1$ F1 strings into $N_1 N_5$ little strings, which become independent momentum carriers. In M theory, the little strings correspond to strips of M2 brane that connect pairs of parallel M5 branes separated along the M-theory direction. We show that if one takes into account the backreaction of the M-theory little strings on the M5 branes one obtains a maze-like structure, to which one can add momentum waves. We also show that adding momentum waves to the little strings gives rise to a momentum-carrying brane configuration -- a super-maze -- which locally preserves 16 supercharges. We therefore expect the backreaction of the super-maze to give rise to a new class of horizonless black-hole microstate solutions, which preserve the rotational symmetry of the black-hole horizon and carry $\sqrt{5/6}$ of its entropy.
description: 29 pages, 7 figures, LaTeX
Imaginary action, spinfoam asymptotics and the 'transplanckian' regime of loop quantum gravity
Creators: name: Bodendorfer, Norbert
name: Neiman, Yasha
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It was recently noted that the on-shell Einstein-Hilbert action with York-Gibbons-Hawking boundary term has an imaginary part, proportional to the area of the codimension-2 surfaces on which the boundary normal becomes null. We discuss the extension of this result to first-order formulations of gravity. As a side effect, we settle the issue of the Holst modification vs. the Nieh-Yan density by demanding a variational principle with suitable boundary conditions. We then set out to find the imaginary action in the large-spin 4-simplex limit of the Lorentzian EPRL/FK spinfoam. It turns out that the spinfoam's effective action indeed has the correct imaginary part, but only if the Barbero-Immirzi parameter is set to +/- i after the quantum calculation. We point out an agreement between this effective action and a recent black hole state-counting calculation in the same limit. Finally, we propose that the large-spin limit of loop quantum gravity can be viewed as a high-energy 'transplanckian' regime.
description: 23 pages, 5 figures; v2: journal version, section 3 rewritten, minor clarifications
Analysis of Phosphatase Activity from Aquatic Heterotrophic Bacteria at the Single Cell Level by Flow Cytometry: Example of a Development Achieved in the Regional Flow Cytometry Platform for Microbiology (Precym) Hosted by the Oceanology Center of Marseille
Creators: name: Gregori, Gerald
name: Denis, Michel
name: Duhamel, Solange
name: Van Wambeke, France
Publisher: name: Columbia University
Year: 2010
Subjects: Biogeochemistry
Marine microbiology
Freshwater microbiology
Heterotrophic bacteria
Phosphorus cycle (Biogeochemistry)
Flow cytometry

description: Marine microbes play a very important role in biogeochemical cycles. Because of their ­biodiversity, the diversity of their metabolisms, and their ­physiological heterogeneity (live/dead, active/inactive cells), it is necessary to study them at the single cell level. Flow cytometry has become a technique of choice to reach this goal, providing a fast, reliable, and multiparametric analysis of individual cells. However, the cost of such a technique makes flow cytometry out of reach for small institutes or laboratory units. It also requires a qualified and well-trained operator. To make this technique available to all the microbiologists of the “Provence Alpes Côte d’Azur” Region, a Regional Flow Cytometry Platform (PRECYM), hosted by the Oceanology Centre of Marseille, was created by a consortium of six laboratories. Its goal is to provide researchers with the possibility to consider new approaches and to guarantee optimal technical, economic, and scientific exploitations of these instruments. An example of such a technical development is described in this chapter. The ELF97 phosphatase substrate has been shown to be a performing tool to assess the phosphorus status of phytoplankton populations. Recently, this technique has been successfully applied to marine heterotrophic bacteria in culture samples in which ELF-labeling was observed by microscopy. In this study, we describe a new protocol for ­ELF-labeling of heterotrophic bacteria that allow detection by flow cytometry. ELF-labeled samples were stored in liquid nitrogen for up to 4 months before analysis without any significant loss of total or ELF-labeled cell abundance and of relative ELF ­fluorescence intensity. This method enables studying ectoenzymatic alkaline phosphatase activity of heterotrophic bacteria at the single cell level in environments even with low cell abundance. It has been successfully applied in both fresh and marine samples. This approach is set to improve our understanding of the physiological response of heterotrophic bacteria to phosphorus limitation.
title: Large Scale Design and Implementation of Convolutional Neural Networks based on Large FPGA Arrays
title: Σχεδίαση και υλοποίηση μεγάλης κλίμακας CNN βασισμένων σε ευρείας κλίμακας συστήματα αναδιατασσόμενης λογικής
Creators: name: Λουκας Χαρισιος
Publisher: name: Technical University of Crete
Year: 2020

description: An international race towards the development of the first exascale supercomputer during the past few years, has created a demand for applications that require comparable amounts of computational work. The superior performance and power consumption that hardware accelerators can achieve, renders their use on such applications inevitable. Convolutional Neural Networks constitute a prime example of a computationally intensive and highly parallelizable system, whose performance can increase significantly, when implemented as such an accelerator, as recent work has shown. This study inherits the hardware accelerator design of a CNN developed by G. Pitsis and attempts to scale it, both horizontally, by incorporating it into the ExaNeSt designs and allowing its use on the QFDB multi-FPGA prototype board, and vertically, by fixing issues with a version of the design that increases the batch size. It also applies a recently published dropout technique on the hardware accelerator at prediction time, demonstrating the capability of trading computational power for increased confidence in the results of the network. The boards used for the purposes of this thesis are the Xilinx ZCU102 and the QFDB, a 4-FPGA prototype board developed in FORTH.
description: Η διεθνής προσπάθεια για την ανάπτυξη του πρώτου υπερυπολογιστή με δυνατότητα εκτέλεσης πράξεων κλίμακας ενός πεντάκις εκατομμυρίου, έχει δημιουργήσει ζήτηση για εφαρμογές που απαιτούν αντίστοιχο υπολογιστικό φόρτο για την εκτέλεση τους. Η υπερέχουσα επίδοση και κατανάλωση ενέργειας που επιτυγχάνουν οι επιταχυντές υλικού, καθιστά την χρήση τους σε τέτοιες εφαρμογές αναπόφευκτη. Τα Συνελικτικά Νευρωνικά Δίκτυα αποτελούν άριστο παράδειγμα ενός υπολογιστικά εντατικού και άκρως παραλληλοποιήσιμου συστήματος, του οποίου η επίδοση βελτιώνεται σημαντικά, με τη υλοποίηση του σαν επιταχυντή υλικού, όπως έχουν δείξει πρόσφατη βιβλιογραφία. Η παρούσα δουλειά κληρονομεί την σχεδίαση υλικού του επιταχυντή ενός ΣΝΔ, υλοποιημένη από τον Α. Γ. Πίτση και επιχειρεί να την κλιμακώσει, τόσο οριζοντίως, με την ενσωμάτωση της στις σχεδιάσεις του ερευνητικού προγράμματος ExaNeSt και χρήση στην πρωτότυπη πλατφόρμα QFDB, όσο και καθέτως, με την αποσφαλμάτωση μιας εκδοχής της σχεδίασης που αυξάνει τον αριθμό δεσμίδων δεδομένων της εισόδου. Επιπλέον, εφαρμόζουμε μια προσφάτως δημοσιευμένη τεχνική απενεργοποίησης νευρώνων κατά τη διάρκεια της εκτέλεσης του δικτύου, επιδεικνύοντας της δυνατότητα βελτίωσης της εμπιστοσύνης στα αποτελέσματα του δικτύου, θυσιάζοντας επεξεργαστική ισχύ. Οι πλατφόρμες που χρησιμοποιήθηκαν στα πλαίσια αυτής της διπλωματικής εργασίας ήταν οι ZCU102 της Xilinx και το QFDB, το πρωτότυπο που αναπτύχθηκε από το ΙΤΕ.
Phosphorus Limitation, Uptake, and Turnover in Benthic Stream Algae
Creators: name: Steinman, Alan D.
name: Duhamel, Solange
Publisher: name: Columbia University
Year: 2017
Subjects: Biogeochemistry
Stream ecology
Freshwater algae
Benthic plants
Phosphorus cycle (Biogeochemistry)

description: In this chapter, three different aspects of P utilization by benthic algae will be covered: (1) assessment of P limitation, (2) measurement of P uptake rates, and (3) determination of the release rate of P (expressed as the turnover rate). We note two caveats regarding this chapter. First, we focus exclusively on inorganic P; it is likely that dissolved organic phosphorus plays an important, albeit relatively undefined role, in the nutrient dynamics of freshwater algae (cf. Hwang et al., 1998; Pant et al., 2002), especially in P-limited environments (Karl and Björkman, 2015). However, treatment of this topic is beyond the scope of this chapter (but see Chapter 24). Second, although we use the term benthic algae throughout the chapter, it should be noted that the benthic algae attached to submerged substrata in streams usually exist as part of a complex assemblage variously referred to as periphyton, aufwuchs, or biofilm. This assemblage usually consists of algae, bacteria, fungi, and meiofauna (see Chapters 9e11, 14) that exist within a mucilaginous, poly- saccharide matrix (Lock et al., 1984), and each biotic group has different affinities for P. Indeed, even within a group, P uptake and cycling may be influenced by the abundance of different species and growth forms (cf. Steinman et al., 1992; Davies and Bothwell, 2012).
The Thermal Sunyaev-Zel'dovich Effect from Massive, Quiescent 0.5 $\leq$ z $\leq$ 1.5 Galaxies
Creators: name: Meinke, Jeremy
name: Böckmann, Kathrin
name: Cohen, Seth
name: Mauskopf, Philip
name: Scannapieco, Evan
name: Sarmento, Richard
name: Lunde, Emily
name: Cottle, J'Neil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use combined South Pole Telescope (SPT)+Planck temperature maps to analyze the circumgalactic medium (CGM) encompassing 138,235 massive, quiescent 0.5 $\leq$ z $\leq$ 1.5 galaxies selected from data from the Dark Energy Survey (DES) and Wide-Field Infrared Survey Explorer (WISE). Images centered on these galaxies were cut from the 1.85 arcmin resolution maps with frequency bands at 95, 150, and 220 GHz. The images were stacked, filtered, and fit with a gray-body dust model to isolate the thermal Sunyaev-Zel'dovich (tSZ) signal, which is proportional to the total energy contained in the CGM of the galaxies. We separate these $M_{\star} = 10^{10.9} M_\odot$ - $10^{12} M_\odot$ galaxies into 0.1 dex stellar mass bins, detecting tSZ per bin up to $5.6σ$ and a total signal-to-noise ratio of $10.1σ$. We also detect dust with an overall signal-to-noise ratio of $9.8σ$, which overwhelms the tSZ at 150GHz more than in other lower-redshift studies. We correct for the $0.16$ dex uncertainty in the stellar mass measurements by parameter fitting for an unconvolved power-law energy-mass relation, $E_{\rm therm} = E_{\rm therm,peak} \left(M_\star/M_{\star,{\rm peak}} \right)^α$, with the peak stellar mass distribution of our selected galaxies defined as $M_{\star,{\rm peak}}= 2.3 \times 10^{11} M_\odot$. This yields an $E_{\rm therm,peak}= 5.98_{-1.00}^{+1.02} \times 10^{60}$ erg and $α=3.77_{-0.74}^{+0.60}$. These are consistent with $z \approx 0$ observations and within the limits of moderate models of active galactic nuclei (AGN) feedback. We also compute the radial profile of our full sample, which is similar to that recently measured at lower-redshift by Schaan et al. (2021).
description: 23 pages, 9 figures, Published in ApJ. Corrected y-axis label/units of Fig. 5 and fixed minor syntax/typos
Katalog des königlichen Rheinischen Museums vaterländischer Alterthümer bei der Universität Bonn
Creators: name: Freudenberg, Johannes
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Katalog des königlichen Rheinischen Museums vaterländischer Alterthümer bei der Universität Bonn. Bonn. Max Cohen & Sohn (Fr. Cohen). 1876. VI. u. 99 S.
description: Bonner Jahrbücher, Bd. 59 (1876): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Massive star cluster origin for the galactic cosmic ray population at very-high energies
Creators: name: Vieu, Thibault
name: Reville, Brian
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We demonstrate that supernova remnant (SNR) shocks embedded within massive star clusters can reproduce both the cosmic-ray proton and all-particle spectra measured in the vicinity of the Earth up to hundreds of peta-electronvolts (PeV). We model two classes of massive star clusters. The first population are "loose clusters" which do not power a collective wind termination shock. SNR shocks then expand in a low-density and weakly magnetised medium, and this population mainly contributes up to the "knee" of the CR spectrum around 1 PeV. The second population are young compact clusters, which are powerful and compact enough to sustain a collective wind outflow. SNR shocks then expand from the cluster into the strongly magnetised wind and accelerate nuclei up to ultra-high energies. This population, representing only about 15% of all Galactic massive star clusters, nevertheless dominates the spectrum between ~ 1 and 100 PeV. While these two components alone can reproduce the shape of the CR spectrum up to hundreds of PeV, adding a light sub-ankle extragalactic component motivated by composition and anisotropy measurements, allows to reproduce the spectrum up to the highest energies. Fitting parameters are systematically linked to physical variables whose values are in line with theoretical expectations.
description: 12 pages, 7 figures, accepted in MNRAS
Jahresbericht über Archäologie der Kunst. Von Hofrath Professor Dr. B. Stark in Heidelberg
Creators: name: Kortegarn, Arthur
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Jahresbericht über Archäologie der Kunst. Von Hofrath Professor Dr. B. Stark in Heidelberg. 182 S. 8. [Aus dem Jahresbericht über die Fortschritte der classischen Alterthumswissenschaft, herausgegeben von Prof. C. Bursian; p. 1465—1647.] Verlag von S. Calvary & Co. in Berlin.
description: Bonner Jahrbücher, Bd. 59 (1876): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
title: Διερεύνηση της συσχέτισης μεταξύ των μηχανικών ιδιοτήτων του πετρώματος και των δεικτών ταξινόμησης, με τη  χρήση πεπερασμένων διαφορών
Creators: name: Γκογκίδου Δήμητρα
Publisher: name: Technical University of Crete
Year: 2004

description: Μη διαθέσιμο
J. B. Nordhoff, Römerstrassen und das Delbrückerland, Münster 1898
Creators: name: Vleuten, F. Van
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Dr. J. B. Nordhoff, Professor an der Königl. Akademie zu Münster, Römerstrassen und das Delbrückerland. Münster. Druck und Verlag der Regensberg’schen Buchhandlung, 1898. 8°. 49 S.
description: Bonner Jahrbücher, Bd. 104 (1899): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Racial Inequities in New York Parole Supervision
Creators: name: Bradner, Kendra
name: Schiraldi, Vincent N.
Publisher: name: Columbia University
Year: 2020
Subjects: Parole
Parole--Administration
Parole revocation
Criminal justice, Administration of
Racism

description: The scope and conditions of parole supervision in New York have profound impacts for people serving supervision sentences. Numerous conditions are a constraint on their liberty, serve as trip wires to incarceration, and can disrupt the process of community reintegration needed for successful reentry after leaving prison. Parole supervision fuels mass incarceration everywhere, but particularly in New York as New York sends more people back to prison for non-criminal, technical parole violations than any state except Illinois. Nearly six times as many people are reincarcerated in state prisons for technical violations such as missing an appointment, being out past curfew, or testing positive for alcohol as were reincarcerated for a new criminal conviction. Moreover, people held on parole violations are now the only population increasing in New York City jails, threatening plans to close the notorious Rikers Island jails complex. Together, incarceration for technical violations costs New York State and localities over $600 million annually. Importantly, the harmful impacts of parole policies disproportionately fall on Black and brown communities. Black and Latinx people are significantly more likely than white people to be under supervision, to be jailed pending a violation hearing, and to be incarcerated in New York State prisons for a parole violation . This report examines these racial and ethnic inequities in New York parole supervision and revocation, and offers further context by summarizing existing research on disparities in supervision practices nationally.
Alexander Tille, Yule and Christmas, their place in the Germanic year, London 1899
Creators: name: Wiedemann, Alfred
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Alexander Tille, Yule and Christmas, their place in the Germanic year. London David Nutt, 1899. 8°. 218 S.
description: Bonner Jahrbücher, Bd. 104 (1899): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
A blazar candidate for the Fermi source 4FGL J1848.7-0129
Creators: name: Luque-Escamilla, Pedro L.
name: Martí, Josep
name: Mestre, Enrique
name: Combi, Jorge A.
name: Albacete-Colombo, Juan F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Fermi source 4FGL J1848.7-0129 has been historically related to the globular cluster GLIMPSE-C01 since its very first detection. Although this association is widely accepted, as it appears in the most recent Fermi catalog, it deserves to be revisited given the multi-wavelength evidences and the recent discovery of variable X-ray sources in the Fermi source region. In particular, low frequency radio maps from the Giant Metre Radio Telescope in Pune (India) have been carefully inspected which, together with X-ray data re-analysis from Chandra, lead us to get a deep insight into the candidates to be associated to 4FGL J1848.7-0129. This results in the discovery of a new X-ray variable point source coincident with an unreported non-thermal radio emitter, both of them well inside the 4FGL J1848.7-0129 error ellipse. We analyze and discuss all these observational facts, and we propose now a newly discovered blazar candidate as the most promising responsible for the gamma ray emission in the Fermi source. If confirmed, this result would set constrains on the number of millisecond pulsars in GLIMPSE-C01 or their gamma-ray emission properties.
description: 6 pages - 5 figures - 1 table - To appear in MNRAS
Verzeichniss der Mitglieder im Jahre 1899, aufgestellt am 1. August 1899
Creators: name: Redaktion, Die
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 104 (1899): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Formation of a barred galaxy in a major merger: The role of AGN feedback
Creators: name: Lokas, Ewa L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Among the many processes involved in galaxy evolution, those of bar formation, quenching, and feedback from an active galactic nucleus (AGN) seem to be connected, however, the nature of these relations remains unclear. In this work, we aim to elucidate them by studying the formation of a barred galaxy in a major merger of two disks in the IllustrisTNG simulations. This merger involves a coalescence of two supermassive black holes and a sudden switch to the kinetic mode of AGN feedback implemented in the simulations, which leads to the removal of the gas from the inner part of the galaxy, followed by quenching of star formation and the formation of the bar. This causal relation between AGN feedback and bar formation explains a number of correlations observed in the data, such as the higher frequency of bars among red spirals and the presence of central gas holes in barred galaxies. In such a picture, the bars do not feed the black holes, so their presence does not increase the AGN strength, and they do not cause quenching. However, bars do form in regions characterized by a low gas fraction resulting from AGN feedback. This scenario is probably applicable to many barred galaxies, not only those formed in major mergers.
description: 5 pages, 4 figures, accepted for publication in A&A Letters
Bericht über die Thätigkeit der Provinzialkommission für die Denkmalspflege in der Rheinprovinz vom 1. April 1898 bis 31. März 1898
Creators: name: Clemen, Paul
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 105 (1900): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Commuting symplectomorphisms on a surface and the flux homomorphism
Creators: name: Kawasaki, Morimichi
name: Kimura, Mitsuaki
name: Matsushita, Takahiro
name: Mimura, Masato
Publisher: name: arXiv
Year: 2021
Subjects: subject: Symplectic Geometry (math.SG)
subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 20F12, 20J05, 37E35, 53D35, 70H15, Secondary 20F36, 37A15, 37J05, 37J10, 57R17, 53D22

description: Let $(S,ω)$ be a closed connected oriented surface whose genus $l$ is at least two equipped with a symplectic form. Then we show the vanishing of the cup product of the fluxes of commuting symplectomorphisms. This result may be regarded as an obstruction for commuting symplectomorphisms. In particular, the image of an abelian subgroup of $\mathrm{Symp}_0^c(S, ω)$ under the flux homomorphism is isotropic with respect to the natural intersection form on $H^1(S;\mathbb{R})$. The key to the proof is a refinement of the non-extendability result, previously given by the first-named and second-named authors, for Py's Calabi quasimorphism $μ_P$ on $\mathrm{Ham}(S, ω)$.
description: The authors found Rousseau's very important previous work (Theorem 1.2) and thus they add his result and erased Subsection 4.3 in the previous version, published in Geom. Funct. Anal., 32 pages, 4 figures
Bericht über die Tätigkeit des Provinzialmuseums in Trier vom 1. April 1928 bis 31. März 1929
Creators: name: Krüger, Emil
name: Steiner, Paul
name: Loeschcke, Siegfried
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 134 (1929): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Extinction time for a random walk in a random environment
Creators: name: De Masi, Anna
name: Presutti, Errico
name: Tsagkarogiannis, Dimitrios
name: Vares, Maria Eulalia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a random walk with death in $[-N,N]$ moving in a time dependent environment. The environment is a system of particles which describes a current flux from $N$ to $-N$. Its evolution is influenced by the presence of the random walk and in turn it affects the jump rates of the random walk in a neighborhood of the endpoints, determining also the rate for the random walk to die. We prove an upper bound (uniform in $N$) for the survival probability up to time $t$ which goes as $c\exp\{-bN^{-2}t\}$, with $c$ and $b$ positive constants.
description: Published at http://dx.doi.org/10.3150/14-BEJ627 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Weisfeiler--Leman and Graph Spectra
Creators: name: Rattan, Gaurav
name: Seppelt, Tim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: F.4; G.2.2
subject: 03B70, 05C81, 05C50, 05C85, 15A18, 15A24, 15A69 (Primary) 68R05, 68R10 (Secondary)

description: Two simple undirected graphs are cospectral if their respective adjacency matrices have the same multiset of eigenvalues. Cospectrality yields an equivalence relation on the family of graphs which is provably weaker than isomorphism. In this paper, we study cospectrality in relation to another well-studied relaxation of isomorphism, namely $k$-dimensional Weisfeiler-Leman ($k$-WL) indistinguishability. Cospectrality with respect to standard graph matrices such as the adjacency or the Laplacian matrix yields a strictly finer equivalence relation than $2$-WL indistinguishability. We show that individualising one vertex plus running $1$-WL already subsumes cospectrality with respect to all such graph matrices. Building on this result, we resolve an open problem of Fürer (2010) about spectral invariants. Looking beyond $2$-WL, we devise a hierarchy of graph matrices generalising the adjacency matrix such that $k$-WL indistinguishability after a fixed number of iterations can be captured as a spectral condition on these matrices. Precisely, we provide a spectral characterisation of $k$-WL indistinguishability after $d$ iterations, for $k,d \in \mathbb{N}$. Our results can be viewed as characterisations of homomorphism indistinguishability over certain graph classes in terms of matrix equations. The study of homomorphism indistinguishability is an emerging field, to which we contribute by extending the algebraic framework of Mančinska and Roberson (2020) and Grohe et al. (2022).
description: Error in Theorem 1.4 resolved
Editorial: Phosphorus Along the Soil-Freshwater-Ocean Continuum
Creators: name: Cade-Menun, Barbara J.
name: Duhamel, Solange
name: Dodd, Rosalind J.
name: Lønborg, Christian
name: Parsons, Chris T.
name: Taylor, William D.
Publisher: name: Columbia University
Year: 2019
Subjects: Biogeochemistry
Phosphorus cycle (Biogeochemistry)
Soils--Phosphorus content
Water--Phosphorus content

description: There is a strong link between soil P stores and P mobilization and transfer to receiving waters, termed the P transfer continuum. Ensuring adequate P for crop production while minimizing water quality degradation requires consideration of this continuum and an international, interdisciplinary approach.
Copepods promote bacterial community changes in surrounding seawater through farming and nutrient enrichment
Creators: name: Shoemaker, Katyanne M.
name: Duhamel, Solange
name: Moisander, Pia H.
Publisher: name: Columbia University
Year: 2019
Subjects: Biogeochemistry
Marine microbiology
Marine microbial ecology
Copepoda
Marine bacteria

description: Bacteria living in the oligotrophic open ocean have various ways to survive under the pressure of nutrient limitation. Copepods, an abundant portion of the mesozooplankton, release nutrients through excretion and sloppy feeding that can support growth of surrounding bacteria. We conducted incubation experiments in the North Atlantic Subtropical Gyre to investigate the response of bacterial communities in the presence of copepods. Bacterial community composition and abundance measurements indicate that copepods have the potential to influence the microbial communities surrounding and associating with them – their ‘zoosphere’, in two ways. First, copepods may attract and support the growth of copiotrophic bacteria including representatives of Vibrionaceae, Oceanospirillales and Rhodobacteraceae in waters surrounding them. Second, copepods appear to grow specific groups of bacteria in or on the copepod body, particularly Flavobacteriaceae and Pseudoalteromonadaceae, effectively ‘farming’ them and subsequently releasing them. These distinct mechanisms provide a new view into how copepods may shape microbial communities in the open ocean. Microbial processes in the copepod zoosphere may influence estimates of oceanic bacterial biomass and in part control bacterial community composition and distribution in seawater.
Residual Entropy of a Two-dimensional Ising Model with Crossing and Four-spin Interactions
Creators: name: Li, De-Zhang
name: Zhao, Yu-Jun
name: Yao, Yao
name: Yang, Xiao-Bao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the residual entropy of a two-dimensional Ising model with crossing and four-spin interactions, both for the case that in zero magnetic field and that in an imaginary magnetic field i(π/2)kT. The spin configurations of this Ising model can be mapped into the hydrogen configurations of square ice with the defined standard direction of the hydrogen bonds. Making use of the equivalence of this Ising system with the exactly solved eight-vertex model and taking the low temperature limit, we obtain the residual entropy. Two soluble cases in zero field and one soluble case in imaginary field are examined. In the case that the free-fermion condition holds in zero field, we find the ground states in low temperature limit include the configurations disobeying the ice rules. In another case in zero field that the four-spin interactions are -{\infty}, and the case in imaginary field that the four-spin interactions are 0, the residual entropy exactly agrees with the result of square ice determined by Lieb in 1967. In the solutions of the latter two cases, we have shown alternative approaches to the residual entropy problem of square ice.
description: 22 pages, 2 figures
Sebastian Ristow, Die Ausgrabungen von St. Pantaleon in Köln. Archäologie und Geschichte von römischer bis in karolingische Zeit
Creators: name: Jäggi, Carola
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Sebastian Ristow, Die Ausgrabungen von St. Pantaleon in Köln. Archäologie und Geschichte von römischer bis in karolingische Zeit. Zeitschrift für Archäologie des Mittelalters, Beiheft 21. Verlag Dr. Rudolf Habelt, Bonn 2009. 184 Seiten, 98 Abbildungen, 21 Tafeln und 2 Beilagen
description: Bonner Jahrbücher, Bd. 208.2008(2010): Bonner Jahrbücher
Hindman's Coloring Theorem in arbitrary semigroups
Creators: name: Golan, Gili
name: Tsaban, Boaz
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: Hindman's Theorem asserts that, for each finite coloring of the natural numbers, there are distinct natural numbers $a_1,a_2,\dots$ such that all of the sums $a_{i_1}+a_{i_2}+\dots+a_{i_m}$ ($m\ge 1$, $i_1
description: Referee comments incorporated
General theory of the modified Gutenberg-Richter law for large seismic moments
Creators: name: Sornette, D.
name: Sornette, A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Gutenberg-Richter power law distribution of earthquake sizes is one of the most famous example illustrating self-similarity. It is well-known that the Gutenberg-Richter distribution has to be modified for large seismic moments, due to energy conservation and geometrical reasons. Several models have been proposed, either in terms of a second power law with a larger b-value beyond a cross-over magnitude, or based on a ``hard'' magnitude cut-off or a ``soft'' magnitude cut-off using an exponential taper. Since the large scale tectonic deformation is dominated by the very largest earthquakes and since their impact on loss of life and properties is huge, it is of great importance to constrain as much as possible the shape of their distribution. We present a simple and powerful probabilistic theoretical approach that shows that the Gamma distribution is the best model, under the two hypothesis that the Gutenberg-Richter power law distribution holds in absence of any condition (condition of criticality) and that one or several constraints are imposed, either based on conservation laws or on the nature of the observations themselves. The selection of the Gamma distribution does not depend on the specific nature of the constraint. We illustrate the approach with two constraints, the existence of a finite moment release rate and the observation of the size of a maximum earthquake in a finite catalog. Our predicted ``soft'' maximum magnitudes compare favorably with those obtained by Kagan [1997] for the Flinn-Engdahl regionalization of subduction zones, collision zones and mid-ocean ridges.
description: 24 pages, including 3 tables, in press in Bull. Seism. Soc. Am
Landscape evolution associated with the 2014–2015 Holuhraun eruption in Iceland
Creators: name: Bonnefoy, L. E.
name: Hamilton, C. W.
name: Scheidt, S. P.
name: Duhamel, Solange
name: Höskuldsson, Á.
name: Jónsdottir, I.
name: Thordarson, T.
name: Münzer, U.
Publisher: name: Columbia University
Year: 2019
Subjects: Hydrology
Volcanology
Volcanic eruptions
Lava flows

description: The 2014–2015 Holuhraun eruption in Iceland developed between the outlet glacier Dyngjujökull and the Askja central volcano and extruded a bulk lava volume of over 1 km3 onto the floodplain of the Jökulsá á Fjöllum river, making it the largest effusive eruption in Iceland during the past 230 years. Time-series monitoring using a combination of traditional aerial imaging, unmanned aerial systems, and field-based geodetic surveys, established an unprecedented record of the hydrological response of the river system to this lava flow. We observed: (1) the formation of lava-dammed lakes and channels produced during dam-breaching events; (2) percolation of glacial meltwater into the porous and permeable lava, forming an ephemeral hydrothermal system that included hot pools and hot springs that emerged from the lava flow front; and (3) the formation of new seepage channels caused by upwelling of water around the periphery of the lava flow. The observations show that lava flows, like the one produced by the 2014–2015 Holuhraun eruption, can cause significant hydrological changes that continue for several years after the lava is emplaced. Documenting these processes is therefore crucial for our interpretation of volcanic landscapes and processes of lava–water interaction on both Earth and Mars.
Vorwort des Direktors / Le mot du directeur
Creators: name: Kirchner, Thomas
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2016

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2014/2015
The existence of the Kähler-Ricci soliton degeneration
Creators: name: Blum, Harold
name: Liu, Yuchen
name: Xu, Chenyang
name: Zhuang, Ziquan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We prove an algebraic version of the Hamilton-Tian Conjecture for all log Fano pairs. More precisely, we show that any log Fano pair admits a canonical two-step degeneration to a reduced uniformly Ding stable triple, which admits a Kähler-Ricci soliton when the ground field $\mathbb{k}=\mathbb{C}$.
description: Final version
МАЪМУРИЙ ҚАМОҚҚА ОЛИШ ТУШУНЧАСИ, МОҲИЯТИ ВА ЖАЗО ТИЗИМИДА ТУТГАН ЎРНИ
Creators: name: Юлдашев, Дж.Х.
name: Адилов, Б.Б.
Publisher: name: Zenodo
Year: 2023

description: Маъмурий ҳуқуқбузарлик факти учун қўлланиладиган маъмурий жазо давлат томонидан ўрнатилган, шахсни жавобгарликка тортиш чораси бўлиб, Ўзбекистон Республикаси Маъмурий жавобгарлик тўғрисидаги кодекснинг 22-моддасида белгиланишича, унинг асосий мақсади превентив (олдини олувчи) таъсир кўрсатиш ҳисобланади. Яъни, ҳуқуқбузарлик содир этган шахснинг ўзига у томонидан такроран ҳуқуқбузарлик содир этилишининг (хусусий превенция), бошқа шахсларга эса, ҳуқуқбузарлик содир этилишининг (умумий превенция) олдини олиш мақсадида қўлланилади.
Object Transport by a Confined Active Suspension
Creators: name: Freund, Jonathan B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Numerical simulations in two space dimensions are used to examine the dynamics, transport, and equilibrium behaviors of a neutrally buoyant circular object immersed in an active suspension within a larger closed circular container. The continuum model of Gao et al. (Phys. Rev. Fluids, 2017) represents the suspension of non-interacting, immotile, extensor-type microscopic agents that have a direction and strength and align in response to strain rate. Such a suspension is well known to be unstable above an activity strength threshold, which depends upon the length scale of the confinement. Introducing the object leads to additional phenomenology. It can confine fluid between it and the container wall, which suppresses local suspension activity. However, its motion also correlates strain rates near its surface with a concomitant correlated active-stress response. Depending on the suspension activity strength, these mechanisms lead to either an attraction toward or repulsion away from the container wall. In addition, a persistent propagating behavior is found for modest activity strength, which provides a mechanism for long-range transport. When activity is so weak that the mobility of the object is essential to support suspension instability and sustain flow, the object essentially parks and all flow terminates when its mobility is diminished as it nears the container wall. Together these mechanisms illustrate potential for performing relatively complex tasks with simple active agents, especially if activity strength is scheduled in time.
Exponential rate of convergence in current reservoirs
Creators: name: De Masi, Anna
name: Presutti, Errico
name: Tsagkarogiannis, Dimitrios
name: Vares, Maria Eulalia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper, we consider a family of interacting particle systems on $[-N,N]$ that arises as a natural model for current reservoirs and Fick's law. We study the exponential rate of convergence to the stationary measure, which we prove to be of the order $N^{-2}$.
description: Published at http://dx.doi.org/10.3150/14-BEJ628 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Bumps, chimera states, and Turing patterns in systems of coupled active rotators
Creators: name: Franović, Igor
name: Omel'chenko, Oleh E.
name: Wolfrum, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Self-organized coherence-incoherence patterns, called chimera states, have first been reported in systems of Kuramoto oscillators. For coupled excitable units similar patterns, where coherent units are at rest, are called bump states. Here, we study bumps in an array of active rotators coupled by non-local attraction and global repulsion. We demonstrate how they can emerge in a supercritical scenario from completely coherent Turing patterns: single incoherent units appear in a homoclinic bifurcation with a subsequent transition via quasiperiodic and chaotic behavior, eventually transforming into extensive chaos with many incoherent units. We present different types of transitions and explain the formation of coherence-incoherence patterns according to the classical paradigm of short-range activation and long-range inhibition.
title: Στοχαστική προσέγγιση της διαχείρησης του έργου προσπέλασης και ανάπτυξης κοιτάσματος
Creators: name: Γαβαλάκη Ευγενία
Publisher: name: Technical University of Crete
Year: 1993

description: 1.Έργα και χρονικός προγραμματισμός έργων 2.Ανάλυση δικτύων σε έργα 3.Τεχνική προγράμματος εκτίμησης και αναθεώρησης (P.E.R.T.) 4.Eφαρμογές των μεθόδων διοίκησης έργων στη μεταλλευτική 5.Εφαρμογή της τεχνικής προγράμματος εκτίμησης και αναθεώρησης στο χρονικό προγραμματισμό της διάνοιξης του νότιου πεδίου Πτολεμαίδας
title: Ενιαίο μοντέλο συστημάτων διαχείρισης κρατήσεων προϊόντων εισερχομένου τουρισμού
Creators: name: Κολοκοτρώνης Εμμανουήλ
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
Estimates of protozoan‐ and viral‐mediated mortality of bacterioplankton in Lake Bourget (France)
Creators: name: Jacquet, Stéphan
name: Domaizon-Pialat, Isabelle
name: Personnic, Sébastien
name: Pradeep Ram, Angia Sriram
name: Hedal, Mikal
name: Duhamel, Solange
name: Sime-Ngando, Télesphore
Publisher: name: Columbia University
Year: 2005
Subjects: Biogeochemistry
Freshwater microbiology
Freshwater ecology
Heterotrophic bacteria
Viruses
Protista

description: 1. We performed three, 1‐week in situ experiments in March‐April (expt 1), May (expt 2) and August (expt 3) 2003 in order to assess protozoan and virus‐induced mortality of heterotrophic bacteria in a French lake. Viral and bacterial abundances were obtained using flow cytometry (FCM) while protozoa were counted using epifluorescence microscopy (EFM). 2. A dilution approach, applied to pretreated grazer‐free samples, allowed us to estimate that viral lysis could be responsible for 60% (expt 1), 35% (expt 2) and 52% (expt 3) of daily heterotrophic bacterial mortality. Flagellate (both mixotrophic and heterotrophic) grazing in untreated samples, was responsible for 56% (expt 1), 63% (expt 2) and 18% (expt 3) of daily heterotrophic bacteria removal. 3. These results therefore suggest that both viral lysis and flagellate grazing had a strong impact on bacterial mortality, and this impact varied seasonally. 4. From parallel transmission electron microscopy (TEM) analysis, we found that the burst size (i.e. the number of viruses potentially released per lysed cell) ranged from nine to 25 (expt 1), 10 to 35 (expt 2) and eight to 25 (expt 3). The percentage of infected heterotrophic bacteria was 5.7% (expt 1), 3.4% (expt 2) and 5.7% (expt 3) so that the calculated percentage of bacterial mortality induced by viruses was 6.3% (expt 1), 3.7% (expt 2) and 6.3% (expt 3). 5. It is clear that the dilution‐FCM and TEM methods yielded different estimates of viral impact, although both methods revealed an increased impact of viruses during summer.