cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gymnotiformes
Creators: name: Cohen, Simone C.
name: Kohn, Anna
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Gymnotiformes

description: Order Gymnotiformes  Family Gymnodontidae
 Electrophorus electricus
 Scutalatus magniancoratus (BR) Gymnotus carapo
 Diechodactylus joaberi (BR) Family Hypopomidae
 Brachyhypopomus brevirostris (= Hypopomus brevirostris)
 Urocleidoides hypopomi (AR)
description: Published as part of Cohen, Simone C. & Kohn, Anna, 2008, South American Monogenea — list of species, hosts and geographical distribution from 1997 to 2008, pp. 1-42 in Zootaxa 1924 on page 27, DOI: 10.5281/zenodo.184771
Quantum-induced interactions in the moduli space of degenerate BPS domain walls
Creators: name: Alonso-Izquierdo, Alberto
name: Guilarte, Juan Mateos
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper quantum effects are investigated in a very special two-scalar field model having a moduli space of BPS topological defects. In a $(1+1)$-dimensional space-time the defects are classically degenerate in mass kinks, but in $(3+1)$ dimensions the kinks become BPS domain walls, all of them sharing the same surface tension at the classical level. The heat kernel/zeta function regularization method will be used to control the divergences induced by the quantum kink and domain wall fluctuations. A generalization of the Gilkey-DeWitt-Avramidi heat kernel expansion will be developed in order to accommodate the infrared divergences due to zero modes in the spectra of the second-order kink and domain wall fluctuation operators, which are respectively $N\times N$ matrix ordinary or partial differential operators. Use of these tools in the spectral zeta function associated with the Hessian operators paves the way to obtain general formulas for the one-loop kink mass and domain wall tension shifts in any $(1+1)$- or $(3+1)$-dimensional $N$-component scalar field theory model. Application of these formulae to the BPS kinks or domain walls of the $N=2$ model mentioned above reveals the breaking of the classical mass or surface tension degeneracy at the quantum level. Because the main parameter distinguishing each member in the BPS kink or domain wall moduli space is essentially the distance between the centers of two basic kinks or walls, the breaking of the degeneracy amounts to the surge in quantum-induced forces between the two constituent topological defects. The differences in surface tension induced by one-loop fluctuations of BPS walls give rise mainly to attractive forces between the constituent walls except if the two basic walls are very far apart. Repulsive forces between two close walls only arise if the coupling is approaches the critical value from below.
description: 34 pages, 7 figures, to appear in JHEP
Cortico-cortical feedback to visual areas can explain reactivation of latent memories during working memory retention
Creators: name: Krause, Noa N.
name: Rademaker, Rosanne L.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Supervised segmentation of NO2 plumes from individual ships using TROPOMI satellite data
Creators: name: Kurchaba, Solomiia
name: van Vliet, Jasper
name: Verbeek, Fons J.
name: Meulman, Jacqueline J.
name: Veenman, Cor J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: J.2; I.5.4; I.5.3; I.2.1

description: The shipping industry is one of the strongest anthropogenic emitters of $\text{NO}_\text{x}$ -- substance harmful both to human health and the environment. The rapid growth of the industry causes societal pressure on controlling the emission levels produced by ships. All the methods currently used for ship emission monitoring are costly and require proximity to a ship, which makes global and continuous emission monitoring impossible. A promising approach is the application of remote sensing. Studies showed that some of the $\text{NO}_\text{2}$ plumes from individual ships can visually be distinguished using the TROPOspheric Monitoring Instrument on board the Copernicus Sentinel 5 Precursor (TROPOMI/S5P). To deploy a remote sensing-based global emission monitoring system, an automated procedure for the estimation of $\text{NO}_\text{2}$ emissions from individual ships is needed. The extremely low signal-to-noise ratio of the available data as well as the absence of ground truth makes the task very challenging. Here, we present a methodology for the automated segmentation of $\text{NO}_\text{2}$ plumes produced by seagoing ships using supervised machine learning on TROPOMI/S5P data. We show that the proposed approach leads to a more than a 20\% increase in the average precision score in comparison to the methods used in previous studies and results in a high correlation of 0.834 with the theoretically derived ship emission proxy. This work is a crucial step toward the development of an automated procedure for global ship emission monitoring using remote sensing data.
description: Version as accepted to MDPI Remote Sensing Journal on November 2022
Shaping Low-Rank Recurrent Neural Networks with Biological Learning Rules
Creators: name: Crespo, Pablo
name: Maoutsa, Dimitra
name: Getz, Matthew P.
name: Gjorgjieva, Julijana
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Phanaeus haroldi Kirsch 1871
Creators: name: Lizardo, Viridiana
name: Moctezuma, Víctor
name: Escobar-Sarria, Federico
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Phanaeus
Phanaeus haroldi

description: Phanaeus haroldi Kirsch, 1871 Recorded Distribution: COLOMBIA: Arauca — Puerto Rondón, Boyacá — Labranzagrande, Pajarito, Caquetá — San Vicente del Caguán, Casanare — Orocué, Cundinamarca — Paratebueno, Huila — Campoalegre, Gigante, Meta — Barranca de Upía, Cabuyaro, Puerto López, Restrepo, San Martín, Vichada — Puerto Carreño, La Primavera, ECUADOR: Morona Santiago — Taisha, Sucúa, Logroño, Santiago, Napo — El Chaco, Archidona, Tena, Orellana — Orellana, La Joya de los Sachas, Loreto, Pastaza — Arajuno, Pastaza, Sucumbios — Lago Agrio, Gonzalo Pizarro, Shushufindi, Zamora Chinchipe — Zamora, PERU: Huánuco — Leoncio Prado, San Martín — Moyobamba, Rioja, VENEZUELA: Amazonas — Atabapo, Barinas — Bolívar, Bolívar — Cedeño. Altitude: from 38 to 2636 m a.s.l. Biomes: Tropical & Subtropical Dry Broadleaf Forests, Tropical & Subtropical Grasslands, Savannas & Shrublands, Tropical & Subtropical Moist Broadleaf Forests. Ecorregions: NEOTROPIC: Apure-Villavicencio dry forests, Magdalena Valley dry forests, Llanos, Venezuelan Andes montane forests, Guianan piedmont moist forests, Cordillera Oriental montane forests, Napo moist forests, Eastern Cordillera Real montane forests, Ucayali moist forests. Predicted distribution: This species distributes from -10.27° to 10.73° latitude in an area of 463,456 Km2. Its predicted distribution has a mean annual temperature of 24.43-26.72° C with a maximum difference of temperature of 11.5° C during the year and mean precipitation of 2479-3256 mm per year.
description: Published as part of Lizardo, Viridiana, Moctezuma, Víctor & Escobar-Sarria, Federico, 2022, Predicted and recorded distribution maps of the genus Phanaeus (Coleoptera: Scarabaeidae). Supplementary material of Distribution, Regionalization, and Diversity of the dung beetle genus Phanaeus MacLeay (Coleoptera: Scarabaeidae) using Species Distribution Models, pp. 1-77 in Zootaxa (suppl.) (suppl.) 5213 (5) on pages 56-57, DOI: 10.5281/zenodo.7387492
Space applications of GAGG:Ce scintillators: a study of afterglow emission by proton irradiation
Creators: name: Dilillo, Giuseppe
name: Zampa, Nicola
name: Campana, Riccardo
name: Fuschino, Fabio
name: Pauletta, Giovanni
name: Rashevskaya, Irina
name: Ambrosino, Filippo
name: Baruzzo, Marco
name: Cauz, Diego
name: Cirrincione, Daniela
name: Citossi, Marco
name: Della Casa, Giovanni
name: Di Ruzza, Benedetto
name: Evangelista, Yuri
name: Galgóczi, Gábor
name: Labanti, Claudio
name: Ripa, Jakub
name: Tommasino, Francesco
name: Verroi, Enrico
name: Fiore, Fabrizio
name: Vacchi, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We discuss the results of a proton irradiation campaign of a GAGG:Ce (Cerium-doped Gadolinium Aluminium Gallium Garnet) scintillation crystal, carried out in the framework of the HERMES-TP/SP (High Energy Rapid Modular Ensemble of Satellites -- Technological and Scientific Pathfinder) mission. A scintillator sample was irradiated with 70 MeV protons, at levels equivalent to those expected in equatorial and sun-synchronous low-Earth orbits over orbital periods spanning 6 months to 10 years. The data we acquired are used to introduce an original model of GAGG:Ce afterglow emission. Results from this model are applied to the HERMES-TP/SP scenario, aiming at an upper-bound estimate of the detector performance degradation resulting from afterglow emission.
Optimal Binary Subspace Codes of Length 6, Constant Dimension 3 and Minimum Distance 4
Creators: name: Honold, Thomas
name: Kiermaier, Michael
name: Kurz, Sascha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 94B05, 05B25, 51E20, Secondary 51E14, 51E22, 51E23

description: It is shown that the maximum size of a binary subspace code of packet length $v=6$, minimum subspace distance $d=4$, and constant dimension $k=3$ is $M=77$; in Finite Geometry terms, the maximum number of planes in $\operatorname{PG}(5,2)$ mutually intersecting in at most a point is $77$. Optimal binary $(v,M,d;k)=(6,77,4;3)$ subspace codes are classified into $5$ isomorphism types, and a computer-free construction of one isomorphism type is provided. The construction uses both geometry and finite fields theory and generalizes to any $q$, yielding a new family of $q$-ary $(6,q^6+2q^2+2q+1,4;3)$ subspace codes.
Optimizing the Determination of the Neutrino Mixing Angle $θ_{13}$ from Reactor Data
Creators: name: Khan, Amir N.
name: McKay, Douglas W.
name: Ralston, John P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The technical breakthroughs of multiple detectors developed by Daya Bay and RENO collaborations have gotten great attention. Yet the optimal determination of neutrino mixing parameters from reactor data depends on the statistical method and demands equal attention. We find that a straightforward method using a minimal parameters will generally outperform a multi-parameter method by delivering more reliable values with sharper resolution. We review standard confidence levels and statistical penalties for models using extra parameters, and apply those rules to our analysis. We find that the methods used in recent work of the Daya Bay and RENO collaborations have several undesirable properties. The existing work also uses non-standard measures of significance which we are unable to explain. A central element of the current methods consists of variationally fitting many more parameters than data points. As a result the experimental resolution of $\sin ^{2}(2θ_{13})$ is degraded. The results also become extremely sensitive to certain model parameters that can be adjusted arbitrarily. The number of parameters to include in evaluating significance is an important issue that has generally been overlooked. The measures of significance applied previously would be consistent if and only if all parameters but one were considered to have no physical relevance for the experiment's hypothesis test. Simpler, more transparent methods can improve the determination of the mixing angle $θ_{13}$ from reactor data, and exploit the advantages from superb hardware technique of the experiments. We anticipate that future experimental analysis will fully exploit those advantages.
description: New text, new figure and new references revise the thrust of the paper to improve determination of the mixing angle. New title reflects this improvement
Observation of quantum jumps of a single quantum dot spin using sub-microsecond single-shot optical readout
Creators: name: Delteil, Aymeric
name: Gao, Wei-bo
name: Fallahi, Parisa
name: Miguel-Sanchez, Javier
name: Imamoglu, Atac
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Single-shot read-out of individual qubits is typically the slowest process among the elementary single- and two-qubit operations required for quantum information processing. Here, we use resonance fluorescence from a single-electron charged quantum dot to read-out the spin-qubit state in 800 nanoseconds with a fidelity exceeding 80%. Observation of the spin evolution on longer timescales reveals quantum jumps of the spin state: we use the experimentally determined waiting-time distribution to characterize the quantum jumps. Embedding a quantum dot in a photonic nanostructure could be used to enhance the collection efficiency by a factor of 10, enabling single-shot read-out with a fidelity exceeding 97%.
description: 5 pages, 3 figures
Xenon-Doped Liquid Argon TPCs as a Neutrinoless Double Beta Decay Platform
Creators: name: Mastbaum, A.
name: Psihas, F.
name: Zennamo, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Searches for neutrinoless double-beta decay continue to expand our understanding of the lepton sector, with experiments now pursuing ton-scale target masses with sensitivity to $m_{ββ}$ covering the allowed parameter space for the inverted neutrino mass ordering. Continued searches for this rare decay will require scalable detector technologies to achieve significant increases in the target mass beyond the ton scale, in order to probe the normal ordering region. This work explores the concept of searching for neutrinoless double-beta decay in a 10 kton scale liquid argon time projection chamber (LArTPC) located deep underground and doped with percent-level quantities of xenon. We discuss the design requirements, background mitigation and detector R&D needs, and considerations for deployment in a modified DUNE far detector module. We find that such a detector could reach $m_{ββ}$ sensitivity at the 2-4 meV range with xenon doping at 2% if significant background reductions can be achieved.
description: 12 pages, 10 figures
Mass, capacitary functions, and the mass-to-capacity ratio
Creators: name: Miao, Pengzi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study connections among the ADM mass, positive harmonic functions tending to zero at infinity, and the capacity of the boundary of asymptotically flat $3$-manifolds with nonnegative scalar curvature. First we give new formulae that detect the ADM mass via harmonic functions. Then we derive a family of monotone quantities and geometric inequalities if the underlying manifold has simple topology. As an immediate application, we observe several additional proofs of the $3$-dimensional Riemannian positive mass theorem. One proof leads to new, sufficient conditions that imply positivity of the mass via $C^0$-geometry of regions separating the boundary and $\infty$. A special case of such sufficient conditions shows, if a region enclosing the boundary has relative small volume, then the mass is positive. As further applications, we obtain integral identities for the mass-to-capacity ratio. We also promote the inequalities to become equality on spatial Schwarzschild manifolds outside rotationally symmetric spheres. Among other things, we show the mass-to-capacity ratio is always bounded below by one minus the square root of the normalized Willmore functional of the boundary. Prompted by our findings, we carry out a study of manifolds satisfying a constraint on the mass-to-capacity ratio. We point out such manifolds satisfy improved inequalities, their mass has an upper bound depending only on the boundary data, there are no closed minimal surfaces enclosing the boundary, and these manifolds include static extensions in the context of the Bartnik quasi-local mass.
description: Theorem 5.1 expanded, Theorem 5.2 added, Introduction expanded, 45 pages
Transitions to improved confinement regimes induced by changes in heating in zero-dimensional models for tokamak plasmas
Creators: name: Zhu, H.
name: Chapman, S. C.
name: Dendy, R. O.
name: Itoh, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: It is shown that rapid substantial changes in heating rate can induce transitions to improved energy confinement regimes in zero-dimensional models for tokamak plasma phenomenology. We examine for the first time the effect of step changes in heating rate in the models of E-J.Kim and P.H.Diamond, Phys.Rev.Lett. 90, 185006 (2003) and M.A.Malkov and P.H.Diamond, Phys.Plasmas 16, 012504 (2009) which nonlinearly couple the evolving temperature gradient, micro-turbulence and a mesoscale flow; and in the extension of H.Zhu, S.C.Chapman and R.O.Dendy, Phys.Plasmas 20, 042302 (2013), which couples to a second mesoscale flow component. The temperature gradient rises, as does the confinement time defined by analogy with the fusion context, while micro-turbulence is suppressed. This outcome is robust against variation of heating rise time and against introduction of an additional variable into the model. It is also demonstrated that oscillating changes in heating rate can drive the level of micro-turbulence through a period-doubling path to chaos, where the amplitude of the oscillatory component of the heating rate is the control parameter.
description: 8 pages, 14 figures
MPEC 2023-V201 : 2023 VY6
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: 2023 VY6

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.
Ophidiiformes
Creators: name: Cohen, Simone C.
name: Kohn, Anna
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Ophidiiformes

description: Order Ophidiiformes  Family Ophidiidae
 Genypterus brasiliensis
 Pseudempleurosoma gibsoni (BR)
description: Published as part of Cohen, Simone C. & Kohn, Anna, 2008, South American Monogenea — list of species, hosts and geographical distribution from 1997 to 2008, pp. 1-42 in Zootaxa 1924 on page 27, DOI: 10.5281/zenodo.184771
Transitive Reduction of Citation Networks
Creators: name: Clough, James R.
name: Gollings, Jamie
name: Loach, Tamar V.
name: Evans, Tim S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In many complex networks the vertices are ordered in time, and edges represent causal connections. We propose methods of analysing such directed acyclic graphs taking into account the constraints of causality and highlighting the causal structure. We illustrate our approach using citation networks formed from academic papers, patents, and US Supreme Court verdicts. We show how transitive reduction reveals fundamental differences in the citation practices of different areas, how it highlights particularly interesting work, and how it can correct for the effect that the age of a document has on its citation count. Finally, we transitively reduce null models of citation networks with similar degree distributions and show the difference in degree distributions after transitive reduction to illustrate the lack of causal structure in such models.
description: 17 pages, 13 figures, data available
title: "Lieber Römer ausgraben als arbeitslos". Arbeitsbeschaffungsmaßnahmen und Archäologie
Creators: name: Weiner, Karin
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 29, Nr. 4 (2000), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: „Super Toll Gott Erste Sane !!!“. Begegnungen in Augenhöhe mit der restaurierten Turmvorhalle des Freiburger Münsters
Creators: name: Zimdars, Dagmar
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 34, Nr. 1 (2005), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Swift chiral quantum walks
Creators: name: Frigerio, Massimo
name: Paris, Matteo G. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A continuous-time quantum walk (CTQW) is sedentary if the return probability in the starting vertex is close to one at all times. Recent results imply that, when starting from a maximal degree vertex, the CTQW dynamics generated by the Laplacian and adjacency matrices are typically sedentary. In this paper, we show that the addition of appropriate complex phases to the edges of the graph, defining a chiral CTQW, can cure sedentarity and lead to swift chiral quantum walks of the adjacency type, which bring the returning probability to zero in the shortest time possible. We also provide a no-go theorem for swift chiral CTQWs of the Laplacian type. Our results provide one of the first, general characterization of tasks that can and cannot be achieved with chiral CTQWs.
description: 20 pages, 2 figures
title: Bauernhäuser auf der Reichenau brauchen. Hilfe Das Weltkulturerbe als Chance
Creators: name: Wichmann, Petra
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 34, Nr. 2 (2005), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
The influence of the membrane potential on inhibitory regulation of plasticity predictions and learned representations
Creators: name: Rubisch, Patricia
name: Stefan, Melanie I.
name: Hennig, Matthias H.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Numerical Comparisons of Linear Power Flow Approximations: Optimality, Feasibility, and Computation Time
Creators: name: Li, Meiyi
name: Du, Yuhan
name: Mohammadi, Javad
name: Crozier, Constance
name: Baker, Kyri
name: Kar, Soummya
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Linear approximations of the AC power flow equations are of great significance for the computational efficiency of large-scale optimal power flow (OPF) problems. Put differently, the feasibility of the obtained solution is essential for practical use cases of OPF. However, most studies focus on approximation error and come short of comprehensively studying the AC feasibility of different linear approximations of power flow. This paper discusses the merits of widely-used linear approximations of active power in OPF problems. The advantages and disadvantages of the linearized models are discussed with respect to four criteria; accuracy of the linear approximation, optimality, feasibility, and computation time. Each method is tested on five different systems.
title: Editorial
Creators: name: Pfister, Ernst
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 35, Nr. 4 (2006), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
A Single-Layer Neuromorphic Encoder Maps EMG Signals into Wrist Kinematics
Creators: name: Bösch, Patrick
name: De Luca, Chiara
name: Indiveri, Giacomo
name: Donati, Elisa
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
title: „1584 roh überschmiert“ ? Die Wand- und Gewölbemalereien der Sylvesterkapelle im Münster zu Konstanz
Creators: name: Roth, Janina
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 40, Nr. 4 (2011), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
On non-compact gradient solitons
Creators: name: Cunha, Antonio W.
name: Griffin, Erin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25

description: In this paper we extend existing results for generalized solitons, called $q$-solitons, to the complete case by considering non-compact solitons. By placing regularity conditions on the vector field $X$ and curvature conditions on $M$, we are able to use the chosen properties of the tensor $q$ to see that such non-compact $q$-solitons are stationary and $q$-flat. We conclude by applying our results to the examples of ambient obstruction solitons, Cotton solitons, and Bach solitons to demonstrate the utility of these general theorems for various flows.
description: Necessary update after major changes to theorem numbering and corrections were made
Robust nuclear spin entanglement via dipolar interactions in polar molecules
Creators: name: Tscherbul, Timur V.
name: Ye, Jun
name: Rey, Ana Maria
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We propose a general protocol for on-demand generation of robust entangled states of nuclear and/or electron spins of ultracold $^1Σ$ and $^2Σ$ polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate the emergence of effective spin-spin interactions of the Ising and XXZ forms, enabled by efficient magnetic control over electric dipolar interactions. We show how to use these interactions to create long-lived cluster and squeezed spin states.
Neural Decoding of Temporal Features of Zebra Finch Song
Creators: name: Ahmadi, Amirmasoud
name: Robotka, Hermina
name: Theunissen, Frederic
name: Gahr, Manfred
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Sensory processing and perception

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
title: Ein Aufnahmesystem zur siedlungsarchäologischen Erfassung am Beispiel des alpinen Bereiches. Ein Beitrag zur Analyse historischer und prähistorischer Raumnutzungskonzepte
Creators: name: Holdermann, Claus-Stephan
name: Manner, Heiko
Publisher: name: University Library Heidelberg
Year: 2014

description: Nur eine Verknüpfung von archäologischen Befunden mit ihren räumlichen Bezügen als funktionale Einheit gewährleistet detaillierte Aussagen zur Siedlungsgeschichte . Das unten dargestellte Aufnahmesystem zur siedlungsarchäologischen Erfassung im alpinen Raum entstand aus der Notwendigkeit heraus, die Befunde des mesolithischen Fundplatzes Ullafelsen (Stubaier Alpen, Tirol) planmäßig mit ihrem ökologischen und ökonomischen Umfeld zu verknüpfen . Wichtiger schien es den Autoren , dass sich die Möglichkeiten des Aufnahmesystems nicht nur auf Befunde prähistorischer Zeitstellung beschränken , um auch allgemeine siedlungsarchäologische Fragestellungen im Hochgebirge behandeln zu können .
description: It is only when archaeological findings are seen in connection with their geographica! relations as a functional unit that detailed information on settlement history can be obtained. The recording System presented below for capturing settlement history in the Alpine region was created out of the necessity to relate the findings of the Mesolithic site at the Ullafelsen rock (Stubai Alps, Tyrol)
to their ecological and economic environment in a systematic way. The authors considered it important not to limit the capabilities of the recording System to prehistoric findings so that general questions of settlement archaeology in the high mountain region could be addressed as well.
Timing and transmission: the role of axonal action potential propagation speed in the synchronization of foveal vision
Creators: name: Bucci, Annalisa
name: Büttner, Marc
name: Domdei, Niklas
name: Rosselli, Federica B.
name: Znidaric, Matej
name: Diggelmann, Roland
name: De Gennaro, Martina
name: Cowan, Cameron S.
name: Harmening, Wolf
name: Hierlemann, Andreas
name: Roska, Botond
name: Franke, Felix
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Sensory processing and perception

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
New Observational $H(z)$ Data from Full-Spectrum Fitting of Cosmic Chronometers in the LEGA-C Survey
Creators: name: Jiao, Kang
name: Borghi, Nicola
name: Moresco, Michele
name: Zhang, Tong-Jie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work, we perform a full-spectrum fitting of 350 massive and passive galaxies selected as cosmic chronometers from the LEGA-C ESO public survey to derive their stellar ages, metallicities, and star-formation histories. We extensively test our results by assessing their dependence on the possible contribution of dust, calibration of noise and signal, and the use of photometric data in addition to spectral information; we as well identify indicators of the correct convergence of the results, including the shape of the posterior distributions, the analysis of specific spectral features, and the correct reproduction of the observed spectrum. We derive a clear age-redshift trend compatible with the aging in a standard cosmological model, showing a clear downsizing pattern, with more massive galaxies being formed at higher redshift ($z_f\sim2.5$) with respect to lower massive ones ($z_f\sim2$). From these data, we measure the differential aging of this population of cosmic chronometers to derive a new measurement of the Hubble parameter, obtaining $H(z=0.8) = 113.1 \pm 15.1 (\mathrm{stat.}) ^{+29.1}_{-11.3} (\mathrm{syst.})\ \mathrm{ km\ s^{-1}\ Mpc^{-1}}$. This analysis allows us for the first time to compare the differential ages of cosmic chronometers measured on the same sample with two completely different methods, the full-spectrum fit (this work) and the analysis of Lick indices, known to correlate with the age and metallicity of the stellar populations \citep{Borghi2022a}. Albeit an understood offset in the absolute ages, the differential ages have proven to be extremely compatible between the two methods, despite the very different data, assumptions, and models considered, demonstrating the robustness of the method.
description: 21 pages, 1 table, 9 figures, published in ApJS. A new OHD supplement to 32 released data (including 4 OHD by Zhang et al. 2014. RAA, 14, 1221) is now available for cosmological model-independent studies
Unified field theoretical approach to deep and recurrent neuronal networks
Creators: name: Segadlo, Kai
name: Epping, Bastian
name: van Meegen, Alexander
name: Dahmen, David
name: Krämer, Michael
name: Helias, Moritz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Understanding capabilities and limitations of different network architectures is of fundamental importance to machine learning. Bayesian inference on Gaussian processes has proven to be a viable approach for studying recurrent and deep networks in the limit of infinite layer width, $n\to\infty$. Here we present a unified and systematic derivation of the mean-field theory for both architectures that starts from first principles by employing established methods from statistical physics of disordered systems. The theory elucidates that while the mean-field equations are different with regard to their temporal structure, they yet yield identical Gaussian kernels when readouts are taken at a single time point or layer, respectively. Bayesian inference applied to classification then predicts identical performance and capabilities for the two architectures. Numerically, we find that convergence towards the mean-field theory is typically slower for recurrent networks than for deep networks and the convergence speed depends non-trivially on the parameters of the weight prior as well as the depth or number of time steps, respectively. Our method exposes that Gaussian processes are but the lowest order of a systematic expansion in $1/n$ and we compute next-to-leading-order corrections which turn out to be architecture-specific. The formalism thus paves the way to investigate the fundamental differences between recurrent and deep architectures at finite widths $n$.
description: Revision including next-to-leading-order corrections
Single-step transmission matrix retrieval for fast imaging through multi-mode fibers
Creators: name: Ancora, Daniele
name: Dominici, Lorenzo
name: Gianfrate, Antonio
name: Cazzato, Paolo
name: De Giorgi, Milena
name: Ballarini, Dario
name: Sanvitto, Daniele
name: Leuzzi, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Recovering the transmission matrix of a disordered medium is a challenging problem in disordered photonics. Usually, its reconstruction relies on a complex inversion that aims at connecting a fully-controlled input to the deterministic interference of the light field scrambled by the device. At the moment, iterative phase-retrieval protocols provide the fastest reconstructing frameworks, converging in a few tens of iterations. Exploiting the knowledge of speckle correlations, we construct a new phase retrieval algorithm that reduces the computational cost to a single iteration. Besides being faster, our method is effective also using less measurements than state-of-the-art protocols. Thanks to reducing computation time by one order of magnitude, our result can be groundbreaking for real-time optical operations in medical imaging.
description: 9 pages, 7 figures
The redshift dependence of black hole mass distribution: Is it reliable for standard sirens cosmology?
Creators: name: Mukherjee, Suvodip
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An upper limit on the mass of a black hole set by the pair-instability supernovae (PISN) process can be useful in inferring the redshift of the gravitational wave (GW) sources by lifting the degeneracy between mass and redshift. However, for this technique to work, it is essential that the PISN mass-scale is redshift independent or at least has a predictable redshift dependence. We show that the observed PISN mass-scale can get smeared and the position of the PISN mass-scale is likely to exhibit a strong redshift dependence due to a combined effect from the non-zero value of the delay time between the formation of a star and the merging of two black holes and the metallicity dependence of PISN mass scale. Due to the unknown form of the delay-time distribution, the redshift dependence of the PISN mass cut-off of the binary black holes (BBHs) cannot be well characterized and will exhibit a large variation with the change in redshift. As a result, the use of a fixed PISN mass scale to infer the redshift of the BBHs from the observed masses will be systematically biased. Though this uncertainty is not severe for the third observation run conducted by the LIGO-Virgo-KAGRA collaboration, in the future this uncertainty will cause a systematic error in the redshift inferred from the PISN mass scale. The corresponding systematic error will be a bottleneck in achieving a few percent precision measurements of the cosmological parameters using this method in the future.
description: 12 pages, 7 figures. Accepted for publication in MNRAS
On a class of poly-context-free groups generated by automata
Creators: name: Cavaleri, Matteo
name: D'Angeli, Daniele
name: Donno, Alfredo
name: Rodaro, Emanuele
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20E08, 20F05, 20F10, 20M35, 68Q70

description: This paper deals with graph automaton groups associated with trees and some generalizations. We start by showing some algebraic properties of tree automaton groups. Then we characterize the associated semigroup, proving that it is isomorphic to the partially commutative monoid associated with the complement of the line graph of the defining tree. After that, we generalize these groups by introducing the quite broad class of reducible automaton groups, which lies in the class of contracting automaton groups without singular points. We give a general structure theorem that shows that all reducible automaton groups are direct limit of poly-context-free groups which are virtually subgroups of the direct product of free groups; notice that this result partially supports a conjecture by T. Brough. Moreover, we prove that tree automaton groups with at least two generators are not finitely presented and they are amenable groups, which are direct limit of non-amenable groups.
description: 23 pages, 6 figures
Variational Learning of Euler-Lagrange Dynamics from Data
Creators: name: Ober-Blöbaum, Sina
name: Offen, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65P10, 93B30, 68T05

description: The principle of least action is one of the most fundamental physical principle. It says that among all possible motions connecting two points in a phase space, the system will exhibit those motions which extremise an action functional. Many qualitative features of dynamical systems, such as the presence of conservation laws and energy balance equations, are related to the existence of an action functional. Incorporating variational structure into learning algorithms for dynamical systems is, therefore, crucial in order to make sure that the learned model shares important features with the exact physical system. In this paper we show how to incorporate variational principles into trajectory predictions of learned dynamical systems. The novelty of this work is that (1) our technique relies only on discrete position data of observed trajectories. Velocities or conjugate momenta do {\em not} need to be observed or approximated and {\em no} prior knowledge about the form of the variational principle is assumed. Instead, they are recovered using backward error analysis. (2) Moreover, our technique compensates discretisation errors when trajectories are computed from the learned system. This is important when moderate to large step-sizes are used and high accuracy is required. For this, we introduce and rigorously analyse the concept of inverse modified Lagrangians by developing an inverse version of variational backward error analysis. (3) Finally, we introduce a method to perform system identification from position observations only, based on variational backward error analysis.
Reassessing thermodynamic advantage from indefinite causal order
Creators: name: Capela, Matheus
name: Verma, Harshit
name: Costa, Fabio
name: Céleri, Lucas Chibebe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Indefinite causal order is a key feature involved in the study of quantum higher order transformations. Recently, intense research has been focused on possible advantages related to the lack of definite causal order of quantum processes. Quite often the quantum switch is claimed to provide advantages in information-theoretic and thermodynamic tasks. We address here the question whether indefinite causal order is a resource for quantum thermodynamics. Inspired by previous results in the literature, we show that indefinite causal order is not necessary for the reported increase in free energy and ergotropy. More specifically, we show that a simple causally ordered process, which replaces the system's state with a new one before the final measurement, outperforms the quantum switch in all thermodynamic tasks considered so far. We further show that a similar advantage can be also achieved without completely discarding system, if we allow for non-Markovian interactions between the system and an environment. We extend the analysis to more extreme examples of indefinite causal order, showing that they do not provide an advantage either. Finally, we discuss a possible way to study the advantages that may arise from indefinite causal order in a general scenario.
Les déterminants de l'accès au financement des PME des technologies de l'information et de la communication (TIC) en Côte d'Ivoire
Creators: name: VAMI Bi Goli Lucien Zan
Publisher: name: Zenodo
Year: 2024

description: Les PME des technologies de l’information et de la communication (TIC) présentent une opportunité aussi bien pour les pays développés que ceux en développement en permettant d’améliorer leur compétitivité et d’entrer dans l’économie de la connaissance et du numérique. Pourtant, dès qu’il s’agit de satisfaire leurs besoins de financement, ces entreprises se heurtent à de nombreux défis, relatifs à l’asymétrie d’informations et au bruit de communication entre les créateurs de ces PME et les pourvoyeurs de fonds. Notre étude vise à identifier les déterminants de l’accès de ces PME au financement en contexte ivoirien. Au plan méthodologique, une étude qualitative suivie d’une analyse logistique (étude quantitative) révèlent qu’il existe un type de profil de dirigeant qui favorise l’accès des PME des TIC au financement; de même que le réseau relationnel détenu par celui-ci. Toutefois, le degré de formalisation de la PME par son dirigeant n’affecte pas son niveau de financement.
Arnol'd cat map lattices
Creators: name: Axenides, Minos
name: Floratos, Emmanuel
name: Nicolis, Stam
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We construct Arnol'd cat map lattice field theories in phase space and configuration space. In phase space we impose that the evolution operator of the linearly coupled maps be an element of the symplectic group, in direct generalization of the case of one map. To this end we exploit the correspondence between the cat map and the Fibonacci sequence. The chaotic properties of these systems can be, also, understood from the equations of motion in configuration space, where they describe inverted harmonic oscillators, with the runaway behavior of the potential competing with the toroidal compactification of the phase space. We highlight the spatio-temporal chaotic properties of these systems using standard benchmarks for probing deterministic chaos of dynamical systems, namely the complete dense set of unstable periodic orbits, which, for long periods, lead to ergodicity and mixing. The spectrum of the periods exhibits a strong dependence on the strength and the range of the interaction.
description: 39 pages, 5 PNG figures, LaTeX2e. Uses utphys.bst for references. v2: Streamlined presentation and added references. v3: Published version
A parafermionic hypergeometric function and supersymmetric 6j-symbols
Creators: name: Apresyan, Elena
name: Sarkissian, Gor
name: Spiridonov, Vyacheslav P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study properties of a parafermionic generalization of the hyperbolic hypergeometric function appearing as the most important part in the fusion matrix for Liouville field theory and the Racah-Wigner symbols for the Faddeev modular double. We show that this generalized hypergeometric function is a limiting form of the rarefied elliptic hypergeometric function $V^{(r)}$ and derive its transformation properties and a mixed difference-recurrence equation satisfied by it. At the intermediate level we describe symmetries of a more general rarefied hyperbolic hypergeometric function. An important $r=2$ case corresponds to the supersymmetric hypergeometric function given by the integral appearing in the fusion matrix of $N=1$ super Liouville field theory and the Racah-Wigner symbols of the quantum algebra ${\rm U}_q({\rm osp}(1|2))$. We indicate relations to the standard Regge symmetry and prove some previous conjectures for the supersymmetric Racah-Wigner symbols by establishing their different parametrizations.
description: 29 pages
Ensembling Neural Networks for Improved Prediction and Privacy in Early Diagnosis of Sepsis
Creators: name: Schamoni, Shigehiko
name: Hagmann, Michael
name: Riezler, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Ensembling neural networks is a long-standing technique for improving the generalization error of neural networks by combining networks with orthogonal properties via a committee decision. We show that this technique is an ideal fit for machine learning on medical data: First, ensembles are amenable to parallel and asynchronous learning, thus enabling efficient training of patient-specific component neural networks. Second, building on the idea of minimizing generalization error by selecting uncorrelated patient-specific networks, we show that one can build an ensemble of a few selected patient-specific models that outperforms a single model trained on much larger pooled datasets. Third, the non-iterative ensemble combination step is an optimal low-dimensional entry point to apply output perturbation to guarantee the privacy of the patient-specific networks. We exemplify our framework of differentially private ensembles on the task of early prediction of sepsis, using real-life intensive care unit data labeled by clinical experts.
description: Accepted at MLHC 2022