cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Collapse dynamics and Hilbert-space stochastic processes
Creators: name: Bajoni, Daniele
name: Nicrosini, Oreste
name: Rimini, Alberto
name: Rodini, Simone
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Spontaneous collapse models of state vector reduction represent a possible solution to the quantum measurement problem. In the present paper we focus our attention on the Ghirardi-Rimini-Weber (GRW) theory and the corresponding continuous localisation models in the form of a Brownian-driven motion in Hilbert space. We consider experimental setups in which a single photon hits a beam splitter and is subsequently detected by photon detector(s), generating a superposition of photon-detector quantum states. Through a numerical approach we study the dependence of collapse times on the physical features of the superposition generated, including also the effect of a finite reaction time of the measuring apparatus. We find that collapse dynamics is sensitive to the number of detectors and the physical properties of the photon-detector quantum states superposition.
description: 24 figures, 21 pages
Prognostic value of semi-quantitative parameters in 68Ga-DOTA-NOC PET/CT in treatment and diagnostics of pancreatic neuroendocrine tumors (pNET) in a single-center retrospective analysis
Creators: name: Stanzel, Susanne
Publisher: name: Zenodo
Year: 2025
Subjects: PET/CT

description: Anonymized Excel spreadsheet with data of the retrospective study.
New multicategory boosting algorithms based on multicategory Fisher-consistent losses
Creators: name: Zou, Hui
name: Zhu, Ji
name: Hastie, Trevor
Publisher: name: arXiv
Year: 2009
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Fisher-consistent loss functions play a fundamental role in the construction of successful binary margin-based classifiers. In this paper we establish the Fisher-consistency condition for multicategory classification problems. Our approach uses the margin vector concept which can be regarded as a multicategory generalization of the binary margin. We characterize a wide class of smooth convex loss functions that are Fisher-consistent for multicategory classification. We then consider using the margin-vector-based loss functions to derive multicategory boosting algorithms. In particular, we derive two new multicategory boosting algorithms by using the exponential and logistic regression losses.
description: Published in at http://dx.doi.org/10.1214/08-AOAS198 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Efficienza energetica dei sistemi acquedottistici: ruolo delle perdite idriche
Creators: name: Lenzi, Chiara <1974>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: ICAR/02 Costruzioni idrauliche e marittime e idrologia

description: Il lavoro di ricerca esplora il panorama dell’efficienza energetica dei sistemi acquedottistici, soffermandosi a considerare possibili indicatori che possano valutarla in maniera corretta e completa, in particolare nei confronti della presenza di perdite in rete. Si prendono in considerazione con maggiore attenzione, tra tutte le strategie per aumentare l’efficienza energetica, quelle che contemporaneamente producono anche risparmi idrici, come la riduzione della pressione e la ricerca attiva delle perdite .
Dopo un inquadramento internazionale, sono stati analizzati mediante mappe tematiche di intensità energetica, i consumi energetici specifici sui sistemi acquedottistici della regione Emilia Romagna per gli anni 2006 e 2007, si è passati ad una analisi critica degli indicatori attualmente in uso.
Inoltre per casi di studio sintetici e tutti i casi di studio proposti, si sono valutate curve di relazione tra percentuale di perdita idrica e aumento del consumo energetico, in grado di dare indicazioni su come ciascun sistema reagisce, in termini di aumento dell’energia consumata, all’aumentare del livello di perdita. Questa relazione appare fortemente influenzata da fattori come la modalità di pompaggio, la posizione delle rotture sulla rete e la scabrezza delle condotte.
E’ emersa la necessità solo poter analizzare separatamentel’influenza sull’efficienza energeticadei sistemi di pompaggio e della rete, mostrando il ruolo importante con cui questa contribuisce all’efficienza globale del sistema. 
Viene proposto uno sviluppo ulteriore dell’indicatore GEE Global Energy Efficiency (Abadia, 2008), che consente di distinguere l’impatto sull’efficienza energetica dovuto alle perdite idriche e alla struttura intrinseca della rete, in termini di collocazione reciproca tra risorsa idrica e domanda e schema impiantistico.Questa metodologia di analisi dell’efficienza energetica è stata applicata ai casi di studio,  sia sintetici che reali, il distretto di Marzaglia (MO) e quello di Mirabello (FE), entrambi alimentati da pompe a giri variabili..
La ricerca ha consentito di mostrare inoltre il ruolo della modellazione numerica in particolare nell’analisi dell’effetto prodotto sull’efficienza energetica dalla presenza di perdite idriche. 
Nell’ultimo capitolo si completa la panoramica dei benefici ottenibili attraverso la riduzione della pressione, che nei casi citati viene conseguita tramite pompe asservite ad inverter, con il caso di studio del distretto Bolognina all’interno del sistema di distribuzione di Bologna, che vede l’utilizzo di valvole riduttrici di pressione. Oltre a stimare il risparmio energetico derivante dalla riduzione delle perdite ottenuta tramite le PRV, sono stati valutati su modello i benefici energetici conseguenti  all’introduzione nel distretto di turbine per la produzione di energia
On Limit theorems in $JW$- algebras
Creators: name: Karimov, Abdusalom
name: Mukhamedov, Farrukh
Publisher: name: arXiv
Year: 2009
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 46L50, 46L55, 46L53, 47A35, 35A99

description: In the present paper, we study bundle convergence in $JW$- algebra and prove certain ergodic theorems with respect to such convergence. Moreover, conditional expectations of reversible $JW$-algebras are considered. Using such expectations, the convergence of supermartingales in such is established.
description: 12 pages
Chaotic subRiemannian geodesic flow in $J^2(\mathbb{R}^2,\mathbb{R})$
Creators: name: Bravo-Doddoli, Alejandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The space of $2$-jets of a real function of two real variables, denoted by $J^2(\mathbb{R}^2,\mathbb{R})$, admits the structure of a metabelian Carnot group, so $J^2(\mathbb{R}^2,\mathbb{R})$ has a normal abelian sub-group $\mathbb{A}$. As any sub-Riemannian manifold, $J^2(\mathbb{R}^2,\mathbb{R})$ has an associated Hamiltonian geodesic flow. The Hamiltonian action of $\mathbb{A}$ on $T^*J^2(\mathbb{R}^2,\mathbb{R})$ yields the reduced Hamiltonian $H_μ$ on $T^*\mathcal{H} \simeq T^*(J^2(\mathbb{R}^2,\mathbb{R})/\mathbb{A})$, where $H_μ$ is a two-dimensional Euclidean space. The paper is devoted to proving that reduced Hamiltonian $H_μ$ is non-integrable by meromorphic functions for some values of $μ$. This result suggests the sub-Riemannian geodesic flow on $J^{2}(\mathbb{R}^2,\mathbb{R})$ is not meromorphically integrable.
That's the way the comet crumbles: Splitting Jupiter-family comets
Creators: name: Fernandez, Y. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Our current understanding of split, Jupiter-family comets is reviewed. The focus is on what recent studies of comets have told us about the nature of the splitting phenomenon. The goal is to not repeat the information given in recent reviews of split comets, but to build upon it. In particular, we discuss comets that have suffered splitting or fragmentation events in the past few years. These include comets (a) 57P/du Toit-Neujmin-Delporte, observed with a long train of fragments in 2002; (b) 73P/Schwassmann-Wachmann 3, which split in 1995 and was extensively studied during its relatively close passage to Earth in 2006, during which dozens of fragments were discovered and studied; and (c) 174P/Echeclus, a Centaur and potentially future JFC, which split in late 2005 and was the first such Centaur observed to do so. We also discuss recent observations by SOHO of split comets that are likely of short-period. The Spitzer Space Telescope has observed many JFCs and provided us with unprecedented detailed views of cometary debris trails, which may be thought of as a middle ground between "normal" ejection of micron-sized dust grains and the cleaving off of meter-to-kilometer sized fragments. We will also discuss potential breakthroughs in studying splitting JFCs that may come from future surveys.
description: 29 pages, 6 figures, to be published in Planetary and Space Science
Renormalization group and bound states
Creators: name: Glazek, Stanislaw D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Similarity renormalization group procedure identifies the role of bound states in the low-energy rate of change of effective coupling constant in a model Hamiltonian with asymptotic freedom.
description: 7 pages, 1 postscript figure, presented at LIGHT CONE 2008 Relativistic Nuclear and Particle Physics, Mulhouse, France, July 7-11, 2008
Threshold estimation for jump-diffusions under small noise asymptotics
Creators: name: Kobayashi, Mitsuki
name: Shimizu, Yasutaka
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: (2020) 62M20 (Primary) 62F12, 60J74 (Secondary)

description: We consider parameter estimation of stochastic differential equations driven by a Wiener process and a compound Poisson process as small noises. The goal is to give a threshold-type quasi-likelihood estimator and show its consistency and asymptotic normality under new asymptotics. One of the novelties of the paper is that we give a new localization argument, which enables us to avoid truncation in the contrast function that has been used in earlier works and to deal with a wider class of jumps in threshold estimation than ever before.
description: 38 pages
title: Capital Gains in Economic Theory and National Accounting
Creators: name: Steindl, Josef
Year: 2017

description: The national accounts do not know capital gains as they do not deal with assets and consider only the relations of flows in one year. Steindl states that modern economics manages practically to ignore the theoretical relevance of capital gains. Steindl argues that a rise in land or share values creates savings just like real investment and that the exclusion of capital gains from national accounts has led to glaring misinterpretations of the data (distortion of the savings rate). He suggests to introduce separate accounts for capital gains, consumer's credit and investment. Furthermore he explains the macroeconomic implications of creating capital gains.
description: Typoskript, 13 Blätter, mit handschriftlicher Ergänzung auf Seite 1 sowie handschriftlicher Paginierung (beides nicht vom Verfasser)
Inefficient star formation: The combined effects of magnetic fields and radiative feedback
Creators: name: Price, Daniel J.
name: Bate, Matthew R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the effects of magnetic fields and radiative protostellar feedback on the star formation process using self-gravitating radiation magnetohydrodynamical calculations. We present results from a series of calculations of the collapse of 50 solar mass molecular clouds with various magnetic field strengths and with and without radiative transfer. We find that both magnetic fields and radiation have a dramatic impact on star formation, though the two effects are in many ways complementary. Magnetic fields primarily provide support on large scales to low density gas, whereas radiation is found to strongly suppress small-scale fragmentation by increasing the temperature in the high-density material near the protostars. With strong magnetic fields and radiative feedback the net result is an inefficient star formation process with a star formation rate of ~< 10% per free-fall time that approaches the observed rate, although we have only been able to follow the calculations for ~1/3 of a free-fall time beyond the onset of star formation.
description: 14 pages, 6 figures, accepted for publication in MNRAS. Movies for all the runs and version with high-res figures available from http://users.monash.edu.au/~dprice/pubs/mclusterRT/ v2: minor changes to match published version
Imprints of ultralight axions on the gravitational wave and pulsar timing measurement
Creators: name: Xie, Ning
name: Huang, Fa Peng
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The axion or axion-like particle motivated from a natural solution of strong CP problem or string theory is a promising dark matter candidate. We study the new observational effects of ultralight axion-like particles by the space-borne gravitational wave detector and the radio telescope. Taking the neutron star-black hole binary as an example, we demonstrate that the gravitational waveform could be obviously modified by the slow depletion of the axion cloud around the black hole formed through the superradiance process. We compare these new effects on the binary with the well-studied effects from dynamical friction with dark matter and dipole radiation in model-independent ways. Finally, we discuss the constraints from LIGO/Virgo and study the detectability of the ultralight axion particles at LISA and TianQin.
description: Published version at SCIENCE CHINA Physics, Mechanics & Astronomy
Cosmic-ray knee and diffuse gamma, e+ and pbar fluxes from collisions of cosmic rays with dark matter
Creators: name: Masip, Manuel
name: Mastromatteo, Iacopo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In models with extra dimensions the fundamental scale of gravity M_D could be of order TeV. In that case the interaction cross section between a cosmic proton of energy E and a dark matter particle χwill grow fast with E for center of mass energies \sqrt{2m_χE} above M_D, and it could reach 1 mbarn at E\approx 10^9 GeV. We show that these gravity-mediated processes would break the proton and produce a diffuse flux of particles/antiparticles, while boosting χwith a fraction of the initial proton energy. We find that the expected cross sections and dark matter densities are not enough to produce an observable asymmetry in the flux of the most energetic (extragalactic) cosmic rays. However, we propose that unsuppressed TeV interactions may be the origin of the knee observed in the spectrum of galactic cosmic rays. The knee would appear at the energy threshold for the interaction of dark matter particles with cosmic protons trapped in the galaxy by \muG magnetic fields, and it would imply a well defined flux of secondary antiparticles and TeV gamma rays.
description: 19 pages, references added, version to appear in JCAP
Self-assembly of monodisperse clusters: Dependence on target geometry
Creators: name: Wilber, Alex W.
name: Doye, Jonathan P. K.
name: Louis, Ard A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We apply a simple model system of patchy particles to study monodisperse self-assembly, using the Platonic solids as target structures. We find marked differences between the assembly behaviours of the different systems. Tetrahedra, octahedra and icosahedra assemble easily, while cubes are more challenging and dodecahedra do not assemble. We relate these differences to the kinetics and thermodynamics of assembly, with the formation of large disordered aggregates a particular important competitor to correct assembly. In particular, the free energy landscapes of those targets that are easy to assemble are funnel-like, whereas for the dodecahedral system the landscape is relatively flat with little driving force to facilitate escape from disordered aggregates.
description: 15 pages, 12 figures
Geometric interference in a high-mobility graphene annulus p-n junction device
Creators: name: Le, Son T.
name: Rigosi, Albert F.
name: Hagmann, Joseph A.
name: Gutierrez, Christopher
name: Lee, Ji Ung
name: Richter, Curt A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The emergence of interference is observed in the resistance of a graphene annulus pn junction device as a result of applying two separate gate voltages. The observed resistance patterns are carefully inspected, and it is determined that the position of the peaks resulting from those patterns are independent of temperature and magnetic field. Furthermore, these patterns are not attributable to Aharonov-Bohm oscillations, Fabry Perot interference at the junction, or moiré potentials. The device data are compared with those of another device fabricated with a traditional Hall bar geometry, as well as with quantum transport simulation data. Since the two devices are of different topological classes, the subtle differences observed in the corresponding measured data indicate that the most likely source of the observed geometric interference patterns is quantum scarring.
title: Some Comments on the Politics of Full Employment
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Keynes, John Maynard <1883-1946> Kalecki, Michal <1899-1970> Vollbeschäftigung Internationale Wirtschaftspolitik Inernationales Währungssystem Deficit spending Öffentliche Schulden Kapitalistische Staaten Sozialistische Staaten

description: Typoskript, 11 Blätter, mit handschriftlichen Anstreichungen (vermutlich nicht vom Verfasser)
Non-symmetric transition probability in generalized qubit models
Creators: name: Niestegge, Gerd
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum mechanical transition probability is symmetric. A probabilistically motivated and more general quantum logical definition of the transition probability was introduced in two preceding papers without postulating its symmetry, but in all the examples considered there it remains symmetric. Here we present a class of binary models where the transition probability is not symmetric, using the extreme points of the unit interval in an order unit space as quantum logic. We show that their state spaces are strictly convex smooth compact convex sets and that each such set K gives rise to a quantum logic of this class with the state space K. The transition probabilities are symmetric iff K is the unit ball in a Hilbert space. In this case, the quantum logic becomes identical with the projection lattice in a spin factor which is a special type of formally real Jordan algebra.
description: 19 pages, 2 figures
The Relationship between Political Efficacy and Time Persective- Updated
Creators: name: Imbar Cohen
name: Raibi, Romi
name: Elisha, Ofer
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Psychology
subject: FOS: Psychology
subject: Social and Behavioral Sciences

description: זוהי הרשמה מראש של אמבר כהן, רומי ראיבי, ועופר אלישע, לקורס פסיכולוגיה ניסויית באוניברסיטת תל אביב.
Du corpus au dictionnaire
Creators: name: Jacquemin, Bernard
name: Ploux, Sabine
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: In this article, we propose an automatic process to build multi-lingual lexico-semantic resources. The goal of these resources is to browse semantically textual information contained in texts of different languages. This method uses a mathematical model called Atlas sémantiques in order to represent the different senses of each word. It uses the linguistic relations between words to create graphs that are projected into a semantic space. These projections constitute semantic maps that denote the sense trends of each given word. This model is fed with syntactic relations between words extracted from a corpus. Therefore, the lexico-semantic resource produced describes all the words and all their meanings observed in the corpus. The sense trends are expressed by syntactic contexts, typical for a given meaning. The link between each sense trend and the utterances used to build the sense trend are also stored in an index. Thus all the instances of a word in a particular sense are linked and can be browsed easily. And by using several corpora of different languages, several resources are built that correspond with each other through languages. It makes it possible to browse information through languages thanks to syntactic contexts translations (even if some of them are partial).
title: A post Keynesian theory of employment, growth and accumulation
Creators: name: Weintraub, Sidney
Year: 2017
Subjects: subject: Neokeynesianismus Beschäftigung Wirtschaftswachstum Kapitalakkumulation

description: Das Paper steht im Zusammenhang mit der 2rd International Summer School of Economics des Centres for Advanced Economic Studies in Triest von August 1982 und der anschließenden Konferenz in Udine von 30.-31. Augsut 1982.
description: Kopie des Forschungspapiers, verkleinert auf 2 Seiten pro Seite, 11 Blätter, paginiert 2-36
OneQ: A Compilation Framework for Photonic One-Way Quantum Computation
Creators: name: Zhang, Hezi
name: Wu, Anbang
name: Wang, Yuke
name: Li, Gushu
name: Shapourian, Hassan
name: Shabani, Alireza
name: Ding, Yufei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we propose OneQ, the first optimizing compilation framework for one-way quantum computation towards realistic photonic quantum architectures. Unlike previous compilation efforts for solid-state qubit technologies, our innovative framework addresses a unique set of challenges in photonic quantum computing. Specifically, this includes the dynamic generation of qubits over time, the need to perform all computation through measurements instead of relying on 1-qubit and 2-qubit gates, and the fact that photons are instantaneously destroyed after measurements. As pioneers in this field, we demonstrate the vast optimization potential of photonic one-way quantum computing, showcasing the remarkable ability of OneQ to reduce computing resource requirements by orders of magnitude.
description: ISCA '23: 50th Annual International Symposium on Computer Architecture, Orlando FL USA, June 17 - 21, 2023
Interplay between magnetic properties and Fermi surface nesting in iron pnictides
Creators: name: Yaresko, A. N.
name: Liu, G. -Q.
name: Antonov, V. N.
name: Andersen, O. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The wave-vector q and doping (x,y) dependences of the magnetic energy, iron moment, and effective exchange interactions in LaFeAsO{1-x}F{x} and Ba{1-2y}K{2y}Fe2As2 are studied by self-consistent LSDA calculations for co-planar spin spirals. For the undoped compounds (x=0, y=0), the minimum of the calculated total energy, E(q), is for q corresponding to stripe antiferromagnetic order. Already at low levels of electron doping (x), this minimum becomes flat in LaFeAsO{1-x}F{x} and for x>=5, it shifts to an incommensurate q. In Ba{1-2y}K{2y}Fe2As2, stripe order remains stable for hole doping up to y=0.3. These results are explained in terms of the band structure. The magnetic interactions cannot be accurately described by a simple classical Heisenberg model and the effective exchange interactions fitted to E(q) depend strongly on doping. The doping dependence of the E(q) curves is compared with that of the noninteracting magnetic susceptibility for which similar trends are found.
description: 17 pages, 5 figures
title: From Stagnation in the 30s to Slow Growth in the 70s.
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Wirtschaftsentwicklung Technischer Fortschritt Vollbeschäftigung Stagnation Effective Nachfrage Industrie Kapazitätsauslastung Wettbewerb

description: Kopie einer Fassung mit kopierten ursprünglich handschriftlichen Korrekturen und handschriftlichen Anmerkungen und Anstreichungen (nicht vom Verfasser). Der vorliegende Text wurde in einer minimal geänderten Fassung zweimal publiziert. - In den "Economic Papers" fehlt der einleitende Absatz ("Personal Reminiscenes").
description: Typoskript, 21 Blätter, mit zahlreichen Anstreichungen
Using string theory to study the quark-gluon plasma: progress and perils
Creators: name: Gubser, Steven S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I outline some of the progress over the past few years in applying ideas from string theory to study the quark-gluon plasma, including the computation of the drag force on heavy quarks and estimates of total multiplicity from black hole formation. I also indicate some of the main perils of the string theory approach.
description: 8 pages, 5 figures, contribution to the proceedings of Quark Matter 2009. v2: Slightly shortened
Monte Carlo study of a Fermi gas with infinite scattering length
Creators: name: Goulko, Olga
name: Wingate, Matthew
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The Fermi gas at unitarity is a particularly interesting system of cold atoms, being dilute and strongly interacting at the same time. It can be studied non-perturbatively with Monte Carlo methods, like the recently developed worm algorithm. We discuss our implementation and tests of this algorithm and suggest a modification that increases its efficiency by reducing autocorrelations. We then show how the worm algorithm can be applied to calculate the critical temperature of an imbalanced Fermi gas (unequal number of fermions in the two spin components). We finally present some results obtained with the modified algorithm, in the balanced as well as in the imbalanced case.
description: 8 pages, Poster presented at the XXVII International Symposium on Lattice Field Theory, July 26-31, 2009, Beijing, China
title: Technology and the Economy: The Case of Falling Productivity Growth in the 1970s
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Wirtschaftsentwicklung Technischer Fortschritt Innovation Diffusion Technologietransfer Produktivitätszuwachs Arbeitslosigkeit

description: Innovations-, Lern- und Diffusionsprozesse, langfristige wirtschaftliche Entwicklung, Wachstumsaussichten, technische Entwicklung.
description: Kopie mit Anstreichungen und Anmerkungen, 9 Blätter, paginiert 2-19
Circular orbits of test particles interacting with massless linear scalar field of the naked singularity
Creators: name: Stashko, O. S.
name: Zhdanov, V. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study effects of the particles coupling with scalar field (SF) on the distribution of stable circular orbits (SCO) around the naked singularity described by the well-known Fisher-Janis-Newman-Winicour solution. The power-law and exponential models of the particle--SF interaction are analyzed. The focus is on the non-connected SCO distributions. We show that coupling between particles and SF can essentially complicate the topology of the SCO distributions. In particular, it can lead to new non-overlapping SCO regions, which are separated by unstable orbits and/or by regions where the circular orbits do not exist.
Città europee e nuove forme di pianificazione. Il caso di Bologna
Creators: name: Ruocco, Francesca <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: M-GGR/01 Geografia

description: Il tema centrale di questo lavoro è costituito dalle nuove forme di pianificazione territoriale in uso nelle principali città europee, con particolare riferimento all'esperienza della pianificazione strategica applicata al governo del territorio, e dall'analisi approfondita delle politiche e degli strumenti di pianificazione urbanistica e territoriale della città di Bologna, dal Piano Regolatore Generale del 1985-'89 al nuovo Piano Strutturale Comunale del 2008. Più precisamente, le caratteristiche, potenzialità e criticità del nuovo strumento urbanistico del capoluogo emiliano-romagnolo, vengono esaminati, non solo, in rapporto alle caratteristiche tipiche dei piani strategici europei, ma anche alle forme tradizionali della pianificazione urbanistica (i piani regolatori generali) di cui il piano strutturale dovrebbe superare i limiti, sia in termini di efficacia operativa, sia per quanto riguarda la capacità di costruire condivisione e consenso tra i diversi attori urbani, sull'idea di città di cui è portatore. 

The main topics of this research are the new tools for urban planning used by the main European cities - with particular reference to strategic planning applied to the territorial management - and the analysis of Bologna policies and instruments for urban and territorial planning, from the Piano Regolatore Generale '85-'89, to the Piano Strutturale Comunale in 2008. More precisely, the Bologna new planning instrument's characteristics, potentialities and criticalities, are not only  investigated in relation to the fundamental characteristics of European strategic plans, but also to the traditional instruments of Italian urbanistic planning (Piani Regolatori Generali), of which the new structural plan should exceed the limits, both in terms of effectiveness; and in terms of ability to build agreement and sharing on its urban project, between different urban actors.
Relativistic multirank interaction kernels of the neutron-proton system
Creators: name: Bondarenko, S. G.
name: Burov, V. V.
name: Hwang, W. -Y. Pauchy
name: Rogochaya, E. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The multirank separable kernels of the neutron-proton interaction for uncoupled $S$ and $P$ partial waves (with the total angular momentum $J$=0,1) are proposed. Two different methods of a relativistic generalization of initially nonrelativistic form factors parametrizing the kernel are considered. Using the constructed kernels the experimental data for phase shifts in the elastic neutron-proton scattering for the laboratory energy up to 3 GeV and low-energy parameters are described. The comparison of our results with other model calculations are presented.
description: 24 pages, 6 figures, 3 tables
Hydrodynamic force on a small squirmer moving with a time-dependent velocity at small Reynolds numbers
Creators: name: Redaelli, T.
name: Candelier, F.
name: Mehaddi, R.
name: Eloy, C.
name: Mehlig, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We calculate the hydrodynamic force on a small spherical, unsteady squirmer moving with a time-dependent velocity in a fluid at rest, taking into account convective and unsteady fluid inertia effects in perturbation theory. Our results generalise those of Lovalenti and Brady (1993) from passive to active spherical particles. We find that convective inertia changes the history-contribution to the hydrodynamic force, as it does for passive particles. We determine how the hydrodynamic force depends on the swimming gait of the unsteady squirmer. Since swimming breaks the spherical symmetry of the problem, the force is not completely determined by the outer solution of the asymptotic matching problem, as it is for passive spheres. There are additional contributions due to the inhomogeneous solution of the inner problem. We also compute the disturbance flow, illustrating convective and unsteady effects when the particle experiences a sudden start followed by a sudden stop.
description: Revised version, 16 pages, 2 figures
OA-Bug: An Olfactory-Auditory Augmented Bug Algorithm for Swarm Robots in a Denied Environment
Creators: name: Tan, Siqi
name: Zhang, Xiaoya
name: Li, Jingyao
name: Jing, Ruitao
name: Zhao, Mufan
name: Liu, Yang
name: Quan, Quan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Searching in a denied environment is challenging for swarm robots as no assistance from GNSS, mapping, data sharing, and central processing is allowed. However, using olfactory and auditory signals to cooperate like animals could be an important way to improve the collaboration of swarm robots. In this paper, an Olfactory-Auditory augmented Bug algorithm (OA-Bug) is proposed for a swarm of autonomous robots to explore a denied environment. A simulation environment is built to measure the performance of OA-Bug. The coverage of the search task can reach 96.93% using OA-Bug, which is significantly improved compared with a similar algorithm, SGBA. Furthermore, experiments are conducted on real swarm robots to prove the validity of OA-Bug. Results show that OA-Bug can improve the performance of swarm robots in a denied environment.
description: 7 pages, 6 figures, accepted by 2023 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
Super-resolution of Green's functions on noisy quantum computers
Creators: name: Cruz, Diogo
name: Magano, Duarte
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum computers, using efficient Hamiltonian evolution routines, have the potential to simulate Green's functions of classically-intractable quantum systems. However, the decoherence errors of near-term quantum processors prohibit large evolution times, posing limits to the spectrum resolution. In this work, we show that Atomic Norm Minimization, a well-known super-resolution technique, can significantly reduce the minimum circuit depth for accurate spectrum reconstruction. We demonstrate this technique by recovering the spectral function of an impurity model from measurements of its Green's function on an IBM quantum computer. The reconstruction error with the Atomic Norm Minimization is one order of magnitude smaller than with more standard signal processing methods. Super-resolution methods can facilitate the simulation of large and previously unexplored quantum systems, and may constitute a useful non-variational tool to establish a quantum advantage in a nearer future.
Gendered Differences in Face Recognition Accuracy Explained by Hairstyles, Makeup, and Facial Morphology
Creators: name: Albiero, Vítor
name: Zhang, Kai
name: King, Michael C.
name: Bowyer, Kevin W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Media reports have accused face recognition of being ''biased'', ''sexist'' and ''racist''. There is consensus in the research literature that face recognition accuracy is lower for females, who often have both a higher false match rate and a higher false non-match rate. However, there is little published research aimed at identifying the cause of lower accuracy for females. For instance, the 2019 Face Recognition Vendor Test that documents lower female accuracy across a broad range of algorithms and datasets also lists ''Analyze cause and effect'' under the heading ''What we did not do''. We present the first experimental analysis to identify major causes of lower face recognition accuracy for females on datasets where previous research has observed this result. Controlling for equal amount of visible face in the test images mitigates the apparent higher false non-match rate for females. Additional analysis shows that makeup-balanced datasets further improves females to achieve lower false non-match rates. Finally, a clustering experiment suggests that images of two different females are inherently more similar than of two different males, potentially accounting for a difference in false match rates.
description: arXiv admin note: substantial text overlap with arXiv:2008.06989
Curriculum Learning for Safe Mapless Navigation
Creators: name: Marzari, Luca
name: Corsi, Davide
name: Marchesini, Enrico
name: Farinelli, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This work investigates the effects of Curriculum Learning (CL)-based approaches on the agent's performance. In particular, we focus on the safety aspect of robotic mapless navigation, comparing over a standard end-to-end (E2E) training strategy. To this end, we present a CL approach that leverages Transfer of Learning (ToL) and fine-tuning in a Unity-based simulation with the Robotnik Kairos as a robotic agent. For a fair comparison, our evaluation considers an equal computational demand for every learning approach (i.e., the same number of interactions and difficulty of the environments) and confirms that our CL-based method that uses ToL outperforms the E2E methodology. In particular, we improve the average success rate and the safety of the trained policy, resulting in 10% fewer collisions in unseen testing scenarios. To further confirm these results, we employ a formal verification tool to quantify the number of correct behaviors of Reinforcement Learning policies over desired specifications.
description: 8 pages, 5 figures. The poster version of this paper has been accepted by The 37th ACM/SIGAPP Symposium on Applied Computing Proceedings (SAC IRMAS 2022)
Optical spectroscopy and photometry of SAX J1808.4-3658 in outburst
Creators: name: Elebert, P.
name: Reynolds, M. T.
name: Callanan, P. J.
name: Hurley, D. J.
name: Ramsay, G.
name: Lewis, F.
name: Russell, D. M.
name: Nord, B.
name: Kane, S. R.
name: DePoy, D. L.
name: Hakala, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808.4-3658, obtained during the 2008 September/October outburst. Doppler tomography of the N III 4640.64 Bowen blend emission line reveals a focused spot of emission at a location consistent with the secondary star. The velocity of this emission occurs at 324 +/- 15 km/s; applying a "K-correction", we find the velocity of the secondary star projected onto the line of sight to be 370 +/- 40 km/s. Based on existing pulse timing measurements, this constrains the mass ratio of the system to be 0.044^{+0.005}_{-0.004}, and the mass function for the pulsar to be 0.44^{+0.16}_{-0.13} Msun. Combining this mass function with various inclination estimates from other authors, we find no evidence to suggest that the neutron star in SAX J1808.4-3658 is more massive than the canonical value of 1.4 Msun. Our optical light curves exhibit a possible superhump modulation, expected for a system with such a low mass ratio. The equivalent width of the Ca II H and K interstellar absorption lines suggest that the distance to the source is ~2.5 kpc. This is consistent with previous distance estimates based on type-I X-ray bursts which assume cosmic abundances of hydrogen, but lower than more recent estimates which assume helium-rich bursts.
description: 12 pages, 10 figures; Accepted for publication in MNRAS
Tryptamine levels in pasturage implicated in bovine pulmonary emphysema
Creators: name: Parmar, Sohan Singh
Publisher: name: University of British Columbia
Year: 2010

description: Reed canary grass (Phalaris ammdinacea L.) (R.C.G.) was found to be the only species, of seven common pasture species, in Interior B.C. wet meadows containing significant quantities of the tryptamine alkaloids. The distribution and concentration of tryptamines within the plant and throughout the season, on a number of R.C.G. meadows both in the Interior and at the Coast developed under very different soil, climate and water regimes, was then accorded attention. Tryptamines were confined to the uppermost leaf blades. Certain of the meadows studied had long been associated with the occurrence of bovine pulmonary emphysema (BPE); the occurrence, concentration and disappearance seems to be somewhat consistent with the occurrence, severity and disappearance of BPE. The effect of nitrogenous fertilizers on tryptamine levels, nitrogen uptake and dry matter yields of R.C.G. was intimately related to the kind of nitrogenous fertilizer and soil water regime. Yields of dry matter, total N levels and tryptamine concentration were differentially related to source and amount of fertilizer; ammonium sources, especially on glei soils, and at high rates, favoured tryptamine production in R.C.G.
Federated Best Arm Identification with Heterogeneous Clients
Creators: name: Chen, Zhirui
name: Karthik, P. N.
name: Tan, Vincent Y. F.
name: Chee, Yeow Meng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study best arm identification in a federated multi-armed bandit setting with a central server and multiple clients, when each client has access to a {\em subset} of arms and each arm yields independent Gaussian observations. The goal is to identify the best arm of each client subject to an upper bound on the error probability; here, the best arm is one that has the largest {\em average} value of the means averaged across all clients having access to the arm. Our interest is in the asymptotics as the error probability vanishes. We provide an asymptotic lower bound on the growth rate of the expected stopping time of any algorithm. Furthermore, we show that for any algorithm whose upper bound on the expected stopping time matches with the lower bound up to a multiplicative constant ({\em almost-optimal} algorithm), the ratio of any two consecutive communication time instants must be {\em bounded}, a result that is of independent interest. We thereby infer that an algorithm can communicate no more sparsely than at exponential time instants in order to be almost-optimal. For the class of almost-optimal algorithms, we present the first-of-its-kind asymptotic lower bound on the expected number of {\em communication rounds} until stoppage. We propose a novel algorithm that communicates at exponential time instants, and demonstrate that it is asymptotically almost-optimal.
Data management proposal for seafloor litter images and videos at European level
Creators: name: M. Vinci
name: A. Cociancich
name: F. Galgani
name: E. Geletti
name: A. Giorgetti
name: G. Hanke
name: M. Le Moigne
name: G. Moncoiffe
name: Jack, M.E. Molina
name: E. Partescano
Publisher: name: OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Oceanographic Section
Year: 2020

description: This document provides background information about the status of the art and management strategy for seafloor litter images and video. In particular, it provides information on how to deal with marine litter data related to seafloor videos and images under EMODnet Chemistry, the formats for gathering, and how EMODnet Chemistry network should manage this kind of marine litter data sets.
First L-band Interferometric Observations of a Young Stellar Object: Probing the Circumstellar Environment of MWC 419
Creators: name: Ragland, S.
name: Akeson, R. L.
name: Armandroff, T.
name: Colavita, M. M.
name: Danchi, W. C.
name: Hillenbrand, L. A.
name: Millan-Gabet, R.
name: Ridgway, S. T.
name: Traub, W. A.
name: Wizinowich, P. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present spatially-resolved K- and L-band spectra (at spectral resolution R = 230 and R = 60, respectively) of MWC 419, a Herbig Ae/Be star. The data were obtained simultaneously with a new configuration of the 85-m baseline Keck Interferometer. Our observations are sensitive to the radial distribution of temperature in the inner region of the disk of MWC 419. We fit the visibility data with both simple geometric and more physical disk models. The geometric models (uniform disk and Gaussian) show that the apparent size increases linearly with wavelength in the 2-4 microns wavelength region, suggesting that the disk is extended with a temperature gradient. A model having a power-law temperature gradient with radius simultaneously fits our interferometric measurements and the spectral energy distribution data from the literature. The slope of the power-law is close to that expected from an optically thick disk. Our spectrally dispersed interferometric measurements include the Br gamma emission line. The measured disk size at and around Br gamma suggests that emitting hydrogen gas is located inside (or within the inner regions) of the dust disk.
description: Accepted for publication in ApJ
Navigating the challenges in creating complex data systems: a development philosophy
Creators: name: Dittmer, Sören
name: Roberts, Michael
name: Gilbey, Julian
name: Biguri, Ander
name: Collaboration, AIX-COVNET
name: Preller, Jacobus
name: Rudd, James H. F.
name: Aston, John A. D.
name: Schönlieb, Carola-Bibiane
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this perspective, we argue that despite the democratization of powerful tools for data science and machine learning over the last decade, developing the code for a trustworthy and effective data science system (DSS) is getting harder. Perverse incentives and a lack of widespread software engineering (SE) skills are among many root causes we identify that naturally give rise to the current systemic crisis in reproducibility of DSSs. We analyze why SE and building large complex systems is, in general, hard. Based on these insights, we identify how SE addresses those difficulties and how we can apply and generalize SE methods to construct DSSs that are fit for purpose. We advocate two key development philosophies, namely that one should incrementally grow -- not biphasically plan and build -- DSSs, and one should always employ two types of feedback loops during development: one which tests the code's correctness and another that evaluates the code's efficacy.