cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The White Dwarf Binary Pathways Survey -- IX. Three long period white dwarf plus subgiant binaries
Creators: name: Parsons, S. G.
name: Hernandez, M. S.
name: Toloza, O.
name: Zorotovic, M.
name: Schreiber, M. R.
name: Gänsicke, B. T.
name: Lagos, F.
name: Raddi, R.
name: Rebassa-Mansergas, A.
name: Ren, J. J.
name: Koester, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Virtually all binaries consisting of a white dwarf with a non-degenerate companion can be classified as either close post-interaction systems (with orbital periods of a few days or less), or wide systems (with periods longer than decades), in which both components have effectively evolved as single stars. Binaries with periods between these two extremes can help constrain common envelope efficiency, or highlight alternative pathways towards the creation of compact binaries. To date such binaries have remained mostly elusive. Here we present three white dwarfs in binaries with evolved subgiant stars with orbital periods of 41, 52 and 461 d. Using Hubble Space Telescope spectroscopy we find that all three systems contain low mass white dwarfs ($\leq$0.4 M$_{\odot}$). One system, TYC 8394$-$1331$-$1, is the inner binary of a hierarchical triple, where the white dwarf plus subgiant binary is orbited by a more distant companion star. These binaries were likely formed from a phase of stable but non-conservative mass transfer, as opposed to common envelope evolution. All three systems will undergo a common envelope phase in the future, but the two shorter period systems are expected to merge during this event, while the longest period system is likely to survive and create a close binary with two low mass white dwarfs.
description: 13 pages, 9 figures. Accepted for publication in MNRAS
title: Cruise Report R/V Kairei KR05-01
Creators: name: F., Millard
Publisher: name: JAMSTEC
Year: 2005
Subjects: subject: Cruise report
subject: R/V KAIREI
subject: oceans

description: [CRUISE REPORT] This document is a preliminary report of KR05-01 on R/V KAIREI from 2005-01-05 to 2005-01-24.
Note bibliografiche: Pittaluga G.B. e Seghezza G. (2021), Building Trust in the International Monetary System. The Different Cases of Commodity Money and Fiat Money, Cham: Springer
Creators: name: Esposito, Lorenzo
Publisher: name: Moneta e Credito
Year: 2023

description: Recensione di: Pittaluga G.B. e Seghezza G. (2021), Building Trust in the International Monetary System. The Different Cases of Commodity Money and Fiat Money, Cham: Springer
description: Moneta e Credito, V. 76 N. 302 (2023): Giugno
Cumulative measure of correlation for multipartite quantum states
Creators: name: de Oliveira, André L. Fonseca
name: Buksman, Efrain
name: de Lacalle, Jesús García López
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The present article proposes a measure of correlation for multiqubit mixed states. The measure is defined recursively, accumulating the correlation of the subspaces, making it simple to calculate without using of regression. Unlike usual measures, the proposed measure is continuous additive and reflects the dimensionality of the state space, allowing to compare states with different dimensions. Examples show that the measure can signal critical points (CP) in the analysis of Quantum Phase Transitions in Heisenberg models.
Caracterización polínica de mieles de Apis mellifera L. de un apiario de Puerto Iguazú, Misiones Argentina
Creators: name: Berdun, Alicia Ines
Publisher: name: Zenodo
Year: 2019
Subjects: Melissopalynology
Pollen
Pollen Flora

description: El estudio de los granos de polen presente en las mieles permite la identificación de los tipos polínicos utilizados como fuentes energéticas y/o proteicas por las abejas Apis mellifera L. Estos datos son de relevancia para trazar las mieles por origen botánico y/o geográfico. En este trabajo se han estudiado 12 muestras de mieles operculadas de un apiario en el departamento de Puerto Iguazú, Misiones, Argentina. Las muestras fueron acetolizadas y observadas mediante microscopio óptico. Se describieron 127 tipos polínicos con sus respectivas características polínicas como ser simetría, polaridad, tamaño, forma, escultura y aperturas. Se identificaron 52 tipos a nivel de especie, 18 a nivel de género, 15 a nivel de familia y 42 tipos indeterminados. La frecuencia de tipos polínicos presentes permitió clasificar a 7 muestras como mieles monoflorales de Asteraceae 1, Brassicaceae 1, Syagrus romanzoffiana, Mirtáceas nativas y Tipo Mimosa. Las restantes fueron clasificadas como multiflorales. La frecuencia de aparición en más del 70 % de las muestras correspondió a Syagrus romanzoffiana “Pindó”, Tipo Vernonia, Mirtáceas nativas, Hovenia dulcis, Parapiptadenia rigida “Anchico colorado” y Asteraceae 1.
title: Multiple model based state estimation and trajectory control for micro aerial vehicles
Creators: name: Gomaa, Mahmoud Abdelhakim Kamel
Publisher: name: Memorial University of Newfoundland
Year: 2022

description: This thesis proposes the design of a multiple model state estimation and control scheme for micro aerial vehicles (MAVs) to cope with different flight conditions such as aggressive flights, hovering flights, and flights under high external disturbances. The work is divided into two main parts. The first part of this thesis presents the design of an interacting multiple model (IMM) filter for visual-inertial navigation (VIN) of MAVs. VIN of MAVs in practice typically uses a single system model for its state estimator design. However, MAVs can operate in different scenarios requiring changes to the estimator model. This thesis proposes the use of a conventional VIN and a drag force VIN in an error-state IMM filtering framework to address the need for multiple models in the estimator. We use an epipolar geometry constraint for the design of the measurement model for both filters to realize computationally efficient state updates. Observability of the proposed modifications to VIN filters (drag force model, and epipolar measurement model) are analyzed, and observability-based consistency rules are derived for the two filters of the IMM. Monte Carlo numerical simulations validate the performance of the observability constrained IMM, which improved the accuracy and consistency of the VINS for changing flight conditions and external wind disturbance scenarios. Experimental validation is performed using the EuRoC dataset to evaluate the performance of the proposed IMM filter design.
MPEC 2023-L67 : COMET P/2008 L2 = P/2023 L1 (Hill)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: COMET P/2008 L2 = P/2023 L1 (Hill)

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Supplementary document for Modal properties of dielectric bowtie cavities with deep sub-wavelength confinement - 6091432.pdf
Creators: name: Kountouris, George
name: Mørk, Jesper
name: Denning, Emil
name: Kristensen, Philip
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplemental Document 1
Supplementary document for Modal properties of dielectric bowtie cavities with deep sub-wavelength confinement - 6099401.pdf
Creators: name: Kountouris, George
name: Mørk, Jesper
name: Denning, Emil
name: Kristensen, Philip
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplemental Document 1
Étale fundamental groups of Kawamata log terminal spaces, flat sheaves, and quotients of Abelian varieties
Creators: name: Greb, Daniel
name: Kebekus, Stefan
name: Peternell, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J17, 14B05, 14E30, 14B25

description: Given a quasi-projective variety X with only Kawamata log terminal singularities, we study the obstructions to extending finite étale covers from the smooth locus $X_{\mathrm{reg}}$ of $X$ to $X$ itself. A simplified version of our main results states that there exists a Galois cover $Y \rightarrow X$, ramified only over the singularities of $X$, such that the étale fundamental groups of $Y$ and of $Y_{\mathrm{reg}}$ agree. In particular, every étale cover of $Y_{\mathrm{reg}}$ extends to an étale cover of $Y$. As first major application, we show that every flat holomorphic bundle defined on $Y_{\mathrm{reg}}$ extends to a flat bundle that is defined on all of $Y$. As a consequence, we generalise a classical result of Yau to the singular case: every variety with at worst terminal singularities and with vanishing first and second Chern class is a finite quotient of an Abelian variety. As a further application, we verify a conjecture of Nakayama and Zhang describing the structure of varieties that admit polarised endomorphisms.
description: v1: this article supersedes arXiv:1302.1655; v2: slightly more general results, simplified topological arguments in Part II of the paper, improved exposition; v3: improved exposition, minor changes as requested by referee; to appear in Duke Mathematical Journal
I regimi internazionali e l’evoluzione dell’economia globale
Creators: name: Guerrieri, Paolo
name: Padoan, Pier Carlo
Publisher: name: Moneta e Credito
Year: 2023

description: La finalità di questo articolo è spiegare l’evoluzione di lungo periodo del sistema economico globale dal secondo dopoguerra ad oggi e le alterne fasi di stabilità e frammentazione che l’hanno caratterizzata. Traendo spunto da un lavoro di Salvatore Biasco e utilizzando un approccio di Economia Politica Internazionale (IPE) l’evoluzione del contesto globale viene suddivisa in quattro sottoperiodi: due caratterizzati dalla presenza di regimi di governance globale, pur profondamente diversi, l’uno negli anni ’50 e ’60 (Bretton Woods) e l’altro negli anni ’90 fino alla crisi globale del 2008-2009 (la Grande Moderazione); e due fasi collocate rispettivamente negli anni ’80 (l’Interdipendenza Oligopolistica) e nello scorso decennio (Ristagno Secolare), entrambe caratterizzate da periodi di transizione più o meno instabili. Nell’ultima parte dell’articolo vengono formulati diversi scenari di evoluzione dell’economia globale e vengono individuate le condizioni necessarie per frenare la frammentazione in corso.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Quantitative equidistribution for certain quadruples in quasi-random groups
Creators: name: Austin, Tim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Dynamical Systems (math.DS)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05D99, 20C15, 37A25

description: In a recent paper (arXiv:1211.6372), Bergelson and Tao proved that if $G$ is a $D$-quasi-random group, and $x$,$g$ are drawn uniformly and independently from $G$, then the quadruple $(g,x,gx,xg)$ is roughly equidistributed in the subset of $G^4$ defined by the constraint that the last two coordinates lie in the same conjugacy class. Their proof gives only a qualitative version of this result. The present notes gives a rather more elementary proof which improves this to an explicit polynomial bound in $D^{-1}$.
description: 5 pages; [TDA Jun 6, 2014] Updated with reference to arxiv:1405.5629 [v3:] This preprint has been re-written to correct to a mistake in the proof of Corollary 3. The journal published that correction in a separate erratum
Governo del mercato, regolazione e politica industriale: discutendo con Salvatore Biasco
Creators: name: De Vincenti, Claudio
Publisher: name: Moneta e Credito
Year: 2023

description: Come auspicava Salvatore Biasco, negli ultimi dieci anni è riemersa l’esigenza di un intervento pubblico che guidi il mercato. Per dare robustezza a questo orientamento, bisogna partire dalle innovazioni portate dai processi di liberalizzazione e riforma della regolazione, senza considerarli riduttivamente parte – qui il mio dissenso da Biasco – di una egemonia culturale neoliberista. Si tratta di utilizzare gli avanzamenti degli ultimi trent’anni nel campo della regolazione per collocare la politica industriale sul terreno delle corrette regole di mercato. Un’impostazione di politica industriale che, per guidare realmente il funzionamento dell’economia, deve saper tenere conto delle risposte degli operatori all’intervento pubblico e del ruolo del mercato come meccanismo per verificare l’efficacia e l’efficienza delle misure adottate.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Non-arbitrary mappings between size and sound in English words
Creators: name: Kearney, Elaine
name: Arciuli, Joanne
name: Guenther, Frank
name: McMahon, Katie Louise
name: De Zubicaray, Greig
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: phonology

description: Contains datasets and R scripts for the study published in Quarterly Journal of Experimental Psychology.
Stable cohomology of the perfect cone toroidal compactification of ${\mathcal A}_g$
Creators: name: Grushevsky, Samuel
name: Hulek, Klaus
name: Tommasi, Orsola
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that the cohomology of the perfect cone (also called first Voronoi) toroidal compactification of the moduli space of complex principally polarized abelian varieties stabilizes, in close to the top degree. Moreover, we show that this stable cohomology is purely algebraic, and we compute it in degree up to 13. Our explicit computations and stabilization results apply in greater generality to various toroidal compactifications and partial compactifications, and in particular we show that the cohomology of the matroidal partial compactification stabilizes (in low degree). For degree up to 8, we describe explicitly the generators of the cohomology. We also discuss various approaches to computing all of the stable cohomology in arbitrary degree.
description: Final version, to appear in Crelle journal
La riforma fiscale del 1996-2000 e il ruolo di Salvatore Biasco
Creators: name: Visco, Vincenzo
Publisher: name: Moneta e Credito
Year: 2023

description: L’articolo considera l’evoluzione dell’imposizione dei redditi in Italia, e in particolare i tentativi di riforma degli anni ’90 e primi 2000. In un tributo a Salvatore Biasco, l’autore ricostruisce il suo ruolo sia come parlamentare che come presidente di una commissione bicamerale sull’imposta sulle società. Considerando in particolare il sistema di Dual Income Tax (DIT) e l’Aiuto alla Crescita Economica (ACE), si evidenziano i differenti principi ispiratori dell’imposizione delle società, e le soluzioni ibride trovate in Italia, nonché le sfide perdurate nel tempo a causa di fattori politici ed economici.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Un ritorno alla socialdemocrazia?
Creators: name: Salvati, Michele
Publisher: name: Moneta e Credito
Year: 2023

description: L’articolo è la recensione del volume di Salvatore Biasco Le ragioni per un ritorno alla socialdemocrazia (2022) che raccoglie i saggi degli ultimi cinque anni dell’autore. Biasco esamina tematiche politiche ed economiche dal punto di vista di un socialista liberale e riformista che analizza l’inadeguatezza della socialdemocrazia italiana nell’affrontare i mutamenti del capitalismo che hanno condotto alla Grande Recessione del 2007-2008 e poi alla crisi del debito sovrano.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Optimal Quantization for Distribution Synthesis
Creators: name: Böcherer, Georg
name: Geiger, Bernhard C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Finite precision approximations of discrete probability distributions are considered, applicable for distribution synthesis, e.g., probabilistic shaping. Two algorithms are presented that find the optimal $M$-type approximation $Q$ of a distribution $P$ in terms of the variational distance $| Q-P|_1$ and the informational divergence $\mathbb{D}(Q| P)$. Bounds on the approximation errors are derived and shown to be asymptotically tight. Several examples illustrate that the variational distance optimal approximation can be quite different from the informational divergence optimal approximation.
description: Submitted to the IEEE Transactions on Information Theory
Online Optimization in Dynamic Environments
Creators: name: Hall, Eric C.
name: Willett, Rebecca M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: High-velocity streams of high-dimensional data pose significant "big data" analysis challenges across a range of applications and settings. Online learning and online convex programming play a significant role in the rapid recovery of important or anomalous information from these large datastreams. While recent advances in online learning have led to novel and rapidly converging algorithms, these methods are unable to adapt to nonstationary environments arising in real-world problems. This paper describes a dynamic mirror descent framework which addresses this challenge, yielding low theoretical regret bounds and accurate, adaptive, and computationally efficient algorithms which are applicable to broad classes of problems. The methods are capable of learning and adapting to an underlying and possibly time-varying dynamical model. Empirical results in the context of dynamic texture analysis, solar flare detection, sequential compressed sensing of a dynamic scene, traffic surveillance,tracking self-exciting point processes and network behavior in the Enron email corpus support the core theoretical findings.
description: arXiv admin note: text overlap with arXiv:1301.1254
AD-01 Non-Hermitian dynamics on the Bloch sphere
Creators: Stavros Komineas
Publisher: name: IEEE
Year: 2025

A system of spins under spin-polarized currents is described using a complex functional, or a non-Hermitian (NH) Hamiltonian. A single spin under a magnetic field already presents non-trivial dynamics including periodic motion [1]. We will focus on the dynamics of two exchange-coupled spins m1, m2 on the Bloch sphere [2]. For uniaxial anisotropy, there are four fixed points for the dynamics. In the case of currents leading to Parity-Time (PT) symmetry, the nonlinear system is bistable for small currents and it exhibits stable oscillating motion. This is akin to synchronized spin-torque oscillators. Simple precessional (periodic) motion can be observed while a perturbation of this gives an additional frequency of oscillation as shown in the figure. An exceptional point that survives also in the nonlinear system is identified analytically. For the full nonlinear system, two conserved quantities are derived that furnish a geometric description of the spin trajectories in phase space, indicate stability of the oscillating motion, and make contact with the conservative (Hamiltonian) system. The progress in analytical results promise to support further work on the dynamics of NH systems that are defined on the Bloch sphere not only in magnetics but also in effective spin systems arising, e.g., in polariton Bose-Einstein condensates.References: [1] A. Galda, V.M. Vinokur, Phys. Rev. B 94, 020408(R) (2016); A. Galda, V.M. Vinokur, Sci. Rep. 9, 17484 (2019). [2] S. Komineas, Phys. Rev. B 107, 094435 (2023).
A system of spins under spin-polarized currents is described using a complex functional, or a non-Hermitian (NH) Hamiltonian. A single spin under a magnetic field already presents non-trivial dynamics including periodic motion [1]. We will focus on the dynamics of two exchange-coupled spins m1, m2 on the Bloch sphere [2]. For uniaxial anisotropy, there are four fixed points for the dynamics. In the case of currents leading to Parity-Time (PT) symmetry, the nonlinear system is bistable for small currents and it exhibits stable oscillating motion. This is akin to synchronized spin-torque oscillators. Simple precessional (periodic) motion can be observed while a perturbation of this gives an additional frequency of oscillation as shown in the figure. An exceptional point that survives also in the nonlinear system is identified analytically. For the full nonlinear system, two conserved quantities are derived that furnish a geometric description of the spin trajectories in phase space, indicate stability of the oscillating motion, and make contact with the conservative (Hamiltonian) system. The progress in analytical results promise to support further work on the dynamics of NH systems that are defined on the Bloch sphere not only in magnetics but also in effective spin systems arising, e.g., in polariton Bose-Einstein condensates.References: [1] A. Galda, V.M. Vinokur, Phys. Rev. B 94, 020408(R) (2016); A. Galda, V.M. Vinokur, Sci. Rep. 9, 17484 (2019). [2] S. Komineas, Phys. Rev. B 107, 094435 (2023).
Area Products and Mass Formula for Kerr-Newman-Taub-NUT Space-time
Creators: name: Pradhan, Parthapratim
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive area product, entropy product, area sum and entropy sum of the event horizon and Cauchy horizons for Kerr-Newman-Taub-NUT(Newman-Unti-Tamburino) black hole in four dimensional \emph{Lorentzian geometry}. We observe that these thermodynamic products are \emph{not} universal(mass-independence) for this black hole(BH), whereas for Kerr-Newman(KN) BH such products are universal (mass-independence). We also examine the entropy sum and area sum. It is shown that they all are depends on mass, charge and NUT parameter of the back ground space-time. Thus we can conclude that the universal(mass-independence) behaviour of area product and entropy product, area sum and entropy sum for Kerr-Newman-Taub-NUT(KNTN) BH fails and which is also quite different from KN BH. We further show that the KNTN BH do not possess \emph{first law of BH thermodynamics } and \emph {Smarr-Gibbs-Duhem } relations, and that such relations are unlikely in the KN case. The failure of these aforementioned features are due to presence of the non-trivial NUT charge which makes the space-time to be asymptotically non-flat, in contrast with KN BH. The another reason of the failure is that Lorentzian KNTN geometry contains \emph{Dirac-Misner type singularity}, which is a manifestation of a non-trivial topological twist of the manifold. The BH \emph{mass formula} and \emph{Christodoulou-Ruffini mass formula} for KNTN black holes are also derived. Finally, we compute the area bound which is just Penrose like inequality for event horizon. From area bound we derive entropy bound. These thermodynamic products on the multi horizon playing a crucial role in BH thermodynamics to understand the microscopic nature of BH entropy.
description: Accepted for publication in Modern Physics Letters A
Il mio iter e il mio debito intellettuale
Creators: name: Biasco, Salvatore
Publisher: name: Moneta e Credito
Year: 2023

description: In chiusura del numero speciale a lui dedicato, riproduciamo una breve nota autobiografica di Salvatore Biasco, già professore ordinario presso Sapienza Università di Roma, e collaboratore della rivista per molti anni.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Energy spectra in turbulent bubbly flows
Creators: name: Prakash, Vivek N.
name: Mercado, Julian Martinez
name: van Wijngaarden, Leen
name: Mancilla, Ernesto
name: Tagawa, Yoshiyuki
name: Lohse, Detlef
name: Sun, Chao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We conduct experiments in a turbulent bubbly flow to study the nature of the transition between the classical $-$5/3 energy spectrum scaling for a single-phase turbulent flow and the $-$3 scaling for a swarm of bubbles rising in a quiescent liquid and of bubble-dominated turbulence. The bubblance parameter, which measures the ratio of the bubble-induced kinetic energy to the kinetic energy induced by the turbulent liquid fluctuations before bubble injection, is often used to characterise the bubbly flow. We vary the bubblance parameter from $b = \infty$ (pseudo-turbulence) to $b = 0$ (single-phase flow) over 2-3 orders of magnitude ($0.01 - 5$) to study its effect on the turbulent energy spectrum and liquid velocity fluctuations. The probability density functions (PDFs) of the liquid velocity fluctuations show deviations from the Gaussian profile for $b > 0$, i.e. when bubbles are present in the system. The PDFs are asymmetric with higher probability in the positive tails. The energy spectra are found to follow the $-$3 scaling at length scales smaller than the size of the bubbles for bubbly flows. This $-$3 spectrum scaling holds not only in the well-established case of pseudo-turbulence, but surprisingly in all cases where bubbles are present in the system ($b > 0$). Therefore, it is a generic feature of turbulent bubbly flows, and the bubblance parameter is probably not a suitable parameter to characterise the energy spectrum in bubbly turbulent flows. The physical reason is that the energy input by the bubbles passes over only to higher wave numbers, and the energy production due to the bubbles can be directly balanced by the viscous dissipation in the bubble wakes as suggested by Lance $\&$ Bataille (1991). In addition, we provide an alternative explanation by balancing the energy production of the bubbles with viscous dissipation in the Fourier space.
description: J. Fluid Mech. (in press)
Cuplength estimates in Morse cohomology
Creators: name: Albers, Peter
name: Hein, Doris
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The main goal of this paper is to give a unified treatment to many known cuplength estimates. As the base case, we prove that for $C^0$-perturbations of a function which is Morse-Bott along a closed submanifold, the number of critical points is bounded below in terms of the cuplength of that critical submanifold. As we work with rather general assumptions the proof also applies in a variety of Floer settings. For example, this proves lower bounds for the number of fixed points of Hamiltonian diffeomorphisms, Hamiltonian chords for Lagrangian submanifolds, translated points of contactomorphisms, and solutions to a Dirac-type equation.
description: 25 pages, 1 figure, appeared online in Journal of Topology and Analysis
Note bibliografiche: Bilotta N. e Botti, F. (a cura di) (2021), The (Near) Future of Central Bank Digital Currencies. Risks and Opportunities for the Global Economy and Society, Berna: Peter Lang AG, International Academic Publishers, pp. 204, ISBN: 97830
Creators: name: Temperini, Jacopo
Publisher: name: Moneta e Credito
Year: 2023

description: Recensione di: Bilotta N. e Botti, F. (a cura di) (2021), The (Near) Future of Central Bank Digital Currencies. Risks and Opportunities for the Global Economy and Society, Berna: Peter Lang AG, International Academic Publishers.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
The double competition multigraph of a digraph
Creators: name: Park, Jeongmi
name: Sano, Yoshio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C20, 05C75

description: In this article, we introduce the notion of the double competition multigraph of a digraph. We give characterizations of the double competition multigraphs of arbitrary digraphs, loopless digraphs, reflexive digraphs, and acyclic digraphs in terms of edge clique partitions of the multigraphs.
description: 9 pages
Note bibliografiche: Sylos Labini S. (2022), La battaglia della Moneta Fiscale. L’idea, i rapporti politici, gli attacchi, le prime applicazioni, le prospettive, Firenze: Il Ponte Editore, pp. 152, ISBN: 978888861869.
Creators: name: Lucarelli, Stefano
Publisher: name: Moneta e Credito
Year: 2023

description: Recensione di: Sylos Labini S. (2022), La battaglia della Moneta Fiscale. L’idea, i rapporti politici, gli attacchi, le prime applicazioni, le prospettive, Firenze: Il Ponte Editore.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
title: “Digital Threads across the Landscape” – a smartphone application co-developed by users
Creators: name: Andersen, Lone Ritchie
name: Møbjerg, Tinna
Publisher: name: University Library Heidelberg
Year: 2014

description: “Digital Threads across the Landscape“ ist eine Smartphone-Anwendung, die prähistorische und historische Funde und Fundplätze passend je nach dem aktuellem Standort des Benutzers anzeigt. Das Projekt strebt an, das kulturelle Erbe für ein breites Publikum leichter verfügbar zu machen und die Öffentlichkeit auf neuen und anderen Wegen für die Kulturgeschichte zu interessieren. Es soll dem Publikum neue Erfahrungen außerhalb der Sphäre traditioneller Museen vermitteln mit Hilfe standortbezogener Programme in Smartphones und Techniken der “Augmented Reality“. Derzeit sind 51 Orte, die eine Zeitspanne von 12.000 Jahren abdecken, in einer App verfügbar. Ein web-basierter Editor macht es z. B. für Museumskuratoren einfach, neue Orte selbst hinzuzufügen, so dass die Anwendung derzeit von Monat zu Monat wächst.
Während des Entwicklungsprozesses wurden zwei Gruppen von Nicht-Profis als Mitentwickler hinzugezogen: eine Gruppe von Studenten und eine Gruppe von Senioren. Die Beteiligung von zwei sehr unterschiedlichen Zielgruppen war fruchtbar und lehrreich für alle Beteiligten. Die Entwickler und die Museumskuratoren erhielten neue Ideen und direkte Rückmeldungen seitens des Publikums zur Form, Funktionalität und zum Inhalt des Projekts. Umgekehrt entwickelten die beteiligten Nicht-Profis ein Wir-Gewühl und wurden zu Botschaftern der entwickelten App.
description:
“Digital Threads across the Landscape” is a smartphone application designed to display prehistoric and historic finds and sites at the actual locations where events took place. The aim of the project is to make cultural heritage more readily available to a wider audience and to engage the public with cultural history in new and different ways; creating new experiences outside of traditional museum settings by means of location-based mobile phone software and Augmented Reality. Currently 51 locations, spanning 12,000 years of cultural history, are available through the app. A web-based editor tool makes it easy for museum curators to add new locations and more sites are being added every month.
Throughout the design process two groups of non-professionals have been involved as co-creators; a group of students and a group of seniors. Engaging two, different target groups proved fruitful and educational for everyone involved. Not only did designers and curators get fresh ideas and immediate response on form, functionality and content, it also caused the co-creators to take ownership and act as ambassadors for the app.
A Two-Loop Five-Gluon Helicity Amplitude in QCD
Creators: name: Badger, Simon
name: Frellesvig, Hjalte
name: Zhang, Yang
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the planar part of the two-loop five gluon amplitude with all helicities positive. To perform the calculation we develop a D-dimensional generalized unitarity procedure allowing us to reconstruct the amplitude by cutting into products of six-dimensional trees. We find a compact form for the integrand which only requires topologies with six or more propagators. We perform cross checks of the universal infra-red structure using numerical integration techniques.
description: 31 pages, 7 figures. version 2 - fix typos and match with journal version
From the function-sheaf dictionary to quasicharacters of $p$-adic tori
Creators: name: Cunningham, Clifton
name: Roe, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14F05 (primary), 14L15 (secondary), 22E50

description: We consider the rigid monoidal category of character sheaves on a smooth commutative group scheme $G$ over a finite field $k$ and expand the scope of the function-sheaf dictionary from connected commutative algebraic groups to this setting. We find the group of isomorphism classes of character sheaves on $G$ and show that it is an extension of the group of characters of $G(k)$ by a cohomology group determined by the component group scheme of $G$. We also classify all morphisms in the category character sheaves on $G$. As an application, we study character sheaves on Greenberg transforms of locally finite type Néron models of algebraic tori over local fields. This provides a geometrization of quasicharacters of $p$-adic tori.
description: Added examples and incorporated referee's suggestions. To be published in Journal of the Institute of Mathematics of Jussieu
Note bibliografiche: Amato A. e Astrologo D. (a cura di) (2022), Economia e politica dopo la catastrofe. L’eredità di Claudio Napoleoni, Napoli-Salerno: Orthotes, pp. 132, ISBN: 9788893143523.
Creators: name: Timponelli, Luca
Publisher: name: Moneta e Credito
Year: 2023

description: Recensione di: Amato A. e Astrologo D. (a cura di) (2022), Economia e politica dopo la catastrofe. L’eredità di Claudio Napoleoni, Napoli-Salerno: Orthotes, pp. 132, ISBN: 9788893143523.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
Numerical simulation of quadratic BSDEs
Creators: name: Chassagneux, Jean-François
name: Richou, Adrien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This article deals with the numerical approximation of Markovian backward stochastic differential equations (BSDEs) with generators of quadratic growth with respect to $z$ and bounded terminal conditions. We first study a slight modification of the classical dynamic programming equation arising from the time-discretization of BSDEs. By using a linearization argument and BMO martingales tools, we obtain a comparison theorem, a priori estimates and stability results for the solution of this scheme. Then we provide a control on the time-discretization error of order $\frac{1}{2}-\varepsilon$ for all $\varepsilon>0$. In the last part, we give a fully implementable algorithm for quadratic BSDEs based on quantization and illustrate our convergence results with numerical examples.
description: Published at http://dx.doi.org/10.1214/14-AAP1090 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Stress and street life: Black women, urban inequality, and coping in a small violent city
Creators: name: Hitchens, Brooklynn Kristina
Publisher: name: No Publisher Supplied
Year: 2020

description: This dissertation examines how direct and vicarious victimization shape the bereavement, coping strategies and quality of life outcomes of low-income, street-identified Black women and girls ages 16 to 54 in two small, high-crime neighborhoods in Wilmington, Delaware. “Street life” or a “street identity” are phenomenological concepts that refer to a set of ideologies, behaviors, and spaces in low-income communities of color that are organized by personal, social and economic survival. I employ a mixed-method, cross-sectional approach which includes data from (a) 277 community-based surveys; (b) 50 in-depth interviews; (c) 22 months of ethnographic field observations; (d) 377 photos and images gathered from social media; and (e) 80 documents (newspaper articles and public records). This approach also includes a methodological framework called Street Participatory Action Research (Street PAR), which actively engages community members and the “researched” population into the entire research process.In this study, I explore how experiencing, witnessing, and hearing about multiple forms of victimization, particularly firearm-related homicide and shootings, influences the subjective psychological wellbeing of this sample of women and girls, along with the perceived social cohesion, aesthetic quality, and safety of their neighborhoods. I develop a conceptual model to illuminate how victimization and violent death traverse through individuals and broader social networks in a small city context, and ultimately have significant implications for the lived experiences of street-identified Black women and girls. I theorize about how street-identified Black women and girls conceptualize violence and violent Black death as contextual worldviews or orientations that are steeped in their racialized, gendered, and cultural identities. Findings provide significant evidence for how the women’s accumulated experiences with victimization influence their overall attitudes towards their community, including more negative perceptions about group connectedness and solidarity, safety, aesthetic quality, walking environment, and availability of healthy foods. The cumulative nature of violence ricochets beyond a direct victim and seeps into the material lives of the wider community, and the gradation of violent encounters structure how street-identified Black women and girls understand their neighborhoods and social world. Black female homicide survivors, or women who vicariously experience the loss of a loved one to homicide, endure a disproportionate level of traumatic, often-repeated exposure to grief and mourning due to violent Black death. I examine how this unique standpoint in oppressed communities is an uneven burden of loss that exposes them to violent harm while equipping them with a skillset to survive and thrive in adverse contexts.
Salvatore Biasco e le interdipendenze economiche e politiche
Creators: name: D'Ippoliti, Carlo
name: Roncaglia, Alessandro
Publisher: name: Moneta e Credito
Year: 2023

description: Questo tributo commemora Salvatore Biasco, illustre collega e amico della rivista. I molteplici contributi di Biasco hanno spaziato dall’economia internazionale alla finanza, passando per l’impegno politico in prima persona. Il lavoro di Biasco ha sempre sottolineato il ruolo centrale della politica economica ma anche la sua natura endogena. In contrasto con le teorie dominanti che attribuiscono le fluttuazioni economiche e le crisi a fattori esterni, Biasco considerava problematica l’idea di un equilibrio stabile di mercato. Il lavoro di Biasco ha gettato luce sull’importante impatto delle variabili finanziarie su quelle reali, ad esempio con articoli sull’endogenità dei cicli valutari e sull’importanza dei flussi lordi di capitali nel sistema monetario internazionale.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre
A systematic validation of hot Neptunes in TESS data
Creators: name: Magliano, Christian
name: Covone, Giovanni
name: Dobal, Richa
name: Cacciapuoti, Luca
name: Tonietti, Luca
name: Giacalone, Steven
name: Vines, Jose I.
name: Inno, Laura
name: Jenkins, James S.
name: Lissauer, Jack J.
name: Bieryla, Allyson
name: Oliva, Fabrizio
name: Pagano, Isabella
name: Kostov, Veselin
name: Ziegler, Carl
name: Ciardi, David R.
name: Gonzales, Erica J.
name: Dressing, Courtney D.
name: Buchhave, Lars A.
name: Howell, Steve B.
name: Matson, Rachel A.
name: Matthews, Elisabeth
name: Rotundi, Alessandra
name: Alves, Douglas
name: Fiscale, Stefano
name: Ienco, Riccardo M.
name: Pena, Pablo
name: Gallo, Francesco
name: Tomajoli, Maria T. Muscari
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We statistically validated a sample of hot Neptune candidates applying a two-step vetting technique using DAVE and TRICERATOPS. We performed a systematic validation of 250 transit-like events in the Transiting Exoplanet Survey Satellite (TESS) archive in the parameter region defined by $P\leq 4$ d and $3R_\oplus\leq R\leq 5R_\oplus$. Through our analysis, we identified 18 hot Neptune-sized candidates, with a false positive probability $<50\%$. Nine of these planet candidates still need to be confirmed. For each of the nine targets we retrieved the stellar parameters using ARIADNE and derived constraints on the planetary parameters by fitting the lightcurves with the juliet package. Within this sample of nine candidates, we statistically validated (i.e, with false positive probability < $0.3\%$) two systems (TOI-277 b and TOI-1288 b) by re-processing the candidates with TRICERATOPS along with follow-up observations. These new validated exoplanets expand the known hot Neptunes population and are high-priority targets for future radial velocities follow-up.
description: 24 pages, 20 figures. Accepted for publication on MNRAS
Friction as Contrast Mechanism in Heterodyne Force Microscopy
Creators: name: Verbiest, G. J.
name: Oosterkamp, T. H.
name: Rost, M. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences
subject: 65Z05

description: The nondestructive imaging of subsurface structures on the nanometer scale has been a long-standing desire in both science and industry. A few impressive images were published so far that demonstrate the general feasibility by combining ultrasound with an Atomic Force Microscope. From different excitation schemes, Heterodyne Force Microscopy seems to be the most promising candidate delivering the highest contrast and resolution. However, the physical contrast mechanism is unknown, thereby preventing any quantitative analysis of samples. Here we show that friction at material boundaries within the sample is responsible for the contrast formation. This result is obtained by performing a full quantitative analysis, in which we compare our experimentally observed contrasts with simulations and calculations. Surprisingly, we can rule out all other generally believed responsible mechanisms, like Rayleigh scattering, sample (visco)elasticity, damping of the ultrasonic tip motion, and ultrasound attenuation. Our analytical description paves the way for quantitative SubSurface-AFM imaging.
description: 7 pages main paper + 11 pages supplementary materials
From Stinespring dilation to Sz.-Nagy dilation on the symmetrized bidisc and operator models
Creators: name: Pal, Sourav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A13, 47A15, 47A20, 47A25, 47A45

description: We provide an explicit normal distinguished boundary dilation to a pair of commuting operators $(S,P)$ having the closed symmetrized bidisc $Γ$ as a spectral set. This is called Sz.-Nagy dilation of $(S,P)$. The operator pair that dilates $(S,P)$ is obtained by an application of Stinespring dilation of $(S,P)$ given by Agler and Young. We further prove that the dilation is minimal and the dilation space is no bigger than the dilation space of the minimal unitary dilation of the contraction $P$. We also describe model space and model operators for such a pair $(S,P)$.
Extended file 3. Scoring sheet
Creators: name: Mohapatra, Sidhiprada
name: G Maiya, Arun
name: Nayak, Ullas U.
name: Sheelvant, Rashmi
name: J, Vennila
name: Watson, Joanne
name: Nandineni, Rama Devi
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420318
subject: People with disability

description: Scoring sheet for Delphi experts
A criterion for invariant measures of Itô processes based on the symbol
Creators: name: Behme, Anita
name: Schnurr, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: An integral criterion for the existence of an invariant measure of an Itô process is developed. This new criterion is based on the probabilistic symbol of the Itô process. In contrast to the standard integral criterion for invariant measures of Markov processes based on the generator, no test functions and hence no information on the domain of the generator is needed.
description: Published at http://dx.doi.org/10.3150/14-BEJ618 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Salvatore Biasco e l’instabilità dell’economia mondiale nella prospettiva dei “cicli valutari”
Creators: name: Palma, Daniela
Publisher: name: Moneta e Credito
Year: 2023

description: Con il saggio su “I cicli valutari e l’economia internazionale” di fine anni Ottanta (1987), Salvatore Biasco avvia una importante riflessione teorica sul regime di fluttuazione dei cambi, confutando sulla base di un approccio keynesiano la validità dei modelli di determinazione del tasso di cambio ispirati ai principi di efficienza dei mercati finanziari. A partire da un quadro analitico di determinazione su base finanziaria del tasso di cambio nel quale le scelte di portafoglio degli operatori internazionali avvengono in condizioni di incertezza e di razionalità limitata, l’analisi mette in luce come la finanza speculativa di breve periodo amplifichi i movimenti della fluttuazione, provocando squilibri strutturali dell’economia reale, che retroagiscono sulla dinamica del cambio e concorrono a destabilizzare il quadro macroeconomico. Su questa linea interpretativa l’analisi di Biasco approda successivamente a una lettura del disequilibrio economico che ha caratterizzato la dinamica dello sviluppo mondiale fino al culmine della crisi finanziaria internazionale del 2007-2008, sottolineando il ruolo del dollaro, in quanto valuta di riferimento del sistema monetario internazionale, e il contributo dell’instabilità dei mercati valutari alla crescente fragilità finanziaria che ha investito l’economia capitalistica.
description: Moneta e Credito, V. 76 N. 303 (2023): Settembre