cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Chemical Imprint of Silicate Dust on the Most Metal-Poor Stars
Creators: name: Ji, Alexander P.
name: Frebel, Anna
name: Bromm, Volker
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the impact of dust-induced gas fragmentation on the formation of the first low-mass, metal-poor stars (< 1Msun) in the early universe. Previous work has shown the existence of a critical dust-to-gas ratio, below which dust thermal cooling cannot cause gas fragmentation. Assuming the first dust is silicon-based, we compute critical dust-to-gas ratios and associated critical silicon abundances ([Si/H]crit). At the density and temperature associated with protostellar disks, we find that a standard Milky Way grain size distribution gives [Si/H]crit = -4.5 +/- 0.1, while smaller grain sizes created in a supernova reverse shock give [Si/H]crit = -5.3 +/- 0.1. Other environments are not dense enough to be influenced by dust cooling. We test the silicate dust cooling theory by comparing to silicon abundances observed in the most iron-poor stars ([Fe/H] < -4.0). Several stars have silicon abundances low enough to rule out dust-induced gas fragmentation with a standard grain size distribution. Moreover, two of these stars have such low silicon abundances that even dust with a shocked grain size distribution cannot explain their formation. Adding small amounts of carbon dust does not significantly change these conclusions. Additionally, we find that these stars exhibit either high carbon with low silicon abundances or the reverse. A silicate dust scenario thus suggests that the earliest low-mass star formation in the most metal-poor regime may have proceeded through two distinct cooling pathways: fine structure line cooling and dust cooling. This naturally explains both the carbon-rich and carbon-normal stars at extremely low [Fe/H].
description: 14 pages, 8 figures; accepted to ApJ
Dendrites endow artificial neural networks with accurate, robust and parameter-efficient learning
Creators: name: Chavlis, Spyridon
name: Poirazi, Panayiota
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Sufficient bound on the mode mismatch of single photons for scalability of the boson sampling computer
Creators: name: Shchesnovich, Valery
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The boson sampler proposed by Aaronson and Arkhipov is a non-universal quantum computer, which can serve as evidence against the extended Church-Turing thesis. It samples the probability distribution at the output of linear unitary optical network, with indistinguishable single photons at the input. Four experimental groups have already tested their small-scale prototypes with up to four photons. The boson sampler with few dozens of single photons is believed to be hard to simulate on a classical computer. For scalability of a realistic boson sampler with current technology it is necessary to know the effect of the photon mode mismatch on its operation. Here a nondeterministic model of the boson sampler is analyzed, which employs partially indistinguishable single photons emitted by identical sources. A sufficient condition on the average mutual fidelity $ \langle \mathcal{F}\rangle$ of the single photons is found, which guarantees that the realistic boson sampler outperforms the classical computer. Moreover, the boson sampler computer with partially indistinguishable single photons is scalable while being beyond the power of classical computers when the single photon mode mismatch $1-\langle \mathcal{F}\rangle$ scales as $ \mathcal{O}(N^{-3/2})$ with the total number of photons $N$.
description: DOI added
Stochastic Process Model derived indicators of overfitting for deep architectures: Applicability to small sample recalibration of sEMG decoders
Creators: name: Lehmler, Stephan J.
name: Saif-Ur-Rehman, Muhammad
name: Iossifidis, Ioannis
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Entanglement distillation toward minimal bond cut surface in tensor networks
Creators: name: Mori, Takato
name: Manabe, Hidetaka
name: Matsueda, Hiroaki
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In tensor networks, a geometric operation of pushing a bond cut surface toward a minimal surface corresponds to entanglement distillation. Cutting bonds defines a reduced transition matrix on the bond cut surface and the associated quantum state naturally emerges from it. We justify this picture quantitatively by evaluating the trace distance between the maximally entangled states and the states on bond cut surfaces in the multi-scale entanglement renormalization ansatz (MERA) and matrix product states in a canonical form. Our numerical result for the random MERA is in a reasonable agreement with our proposal. The result sheds new light on a deeper understanding of the Ryu-Takayanagi formula for entanglement entropy in holography and the emergence of geometry from the entanglement structure.
description: 10 pages, 9 figures; title and abstract modified, references and comments including detailed explanations of relevance to previous literature and future directions added, published version in PRD (v2)
Analytic average magnetization expression for the body centered cubic Ising lattice
Creators: name: Kaya, Tuncer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recently we have performed large-scale average magnetization studies of the Ising model for the square, honeycomb, triangular, and simple cubic lattice. We want to complement those studies with the structurally more complicated body-centered cubic lattice Ising model in this paper. We have relevantly calculated the order parameter or average magnetization expression for the body-centered cubic Ising lattice based on the recently developed interrelation, given by $\langleσ_{0, i}\rangle= \langle\tanh[K(σ_{1,i}+σ_{2,i}+\dots +σ_{z,i})+H]\rangle$. We will use the same conjectures for the odd spins correlation functions as in our previous works. The mathematical forms of the odd spin correlation functions will be eventually elucidated by some physical discussions. We have seen that the obtained average magnetization expression with the numerical data for the body-centered cubic lattice Ising model is in good agreement.
description: 6 pages, 3 figures
title: Forstwirtschaft und Denkmalschutz. Neue Wege zum Schutz archäologischer Denkmale im Wald
Creators: name: Schaber-Schoor, Gerhard
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 42, Nr. 4 (2013), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Testing assumptions and predictions of star-formation theories
Creators: name: González-Samaniego, Alejandro
name: Vázquez-Semadeni, Enrique
name: González, Ricardo F.
name: Kim, Jongsoo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (Abridged). We present numerical simulations of isothermal, MHD, supersonic turbulence, designed to test various hypotheses frequently assumed in star formation(SF) theories. We consider three simulations, each with a different combination of physical size, rms sonic Mach number, and Jeans parameter, but chosen as to give the same value of the virial parameter and to conform with Larson's scaling relations. As in the non-magnetic case: we find no simultaneously subsonic and super-Jeans structures in our MHD simulations. We find that the fraction of small-scale super-Jeans structures increases when self gravity is turned on, and that the production of gravitationally unstable dense cores by turbulence alone is very low. This implies that self-gravity is in general necessary not only to induce the collapse of Jeans-unstable cores, but also to form them. We find that denser regions tend to have more negative values of the velocity divergence, implying a net inwards flow towards the regions' centers. We compare the results from our simulations with the predictions from the recent SF theories by Krumholz & McKee, Padoan & Nordlund, and Hennebelle & Chabrier, using the expressions recently provided by Federrath & Klessen. We find that none of these theories reproduces the dependence of the SFEff with Ms observed in our simulations in the MHD case. The SFEff predicted by the theories ranges between half and one order of magnitude larger than what we observe in the simulations in both the HD and the MHD cases. We conclude that the type of flow used in simulations like the ones presented here and assumed in recent SF theories, may not correctly represent the flow within actual clouds, and that theories that assume it does may be missing a fundamental aspect of the flow. We suggest that a more realistic regime may be that of hierarchical gravitational collapse.
description: 20 pages, 13 figures, minor changes after final referee report, results unchanged; added references. Accepted for publication in MNRAS
Efficient cortical spike train decoding for brain-machine interface implants with recurrent spiking neural networks
Creators: name: Liu, Tengjun
name: Gygax, Julia
name: Rossbroich, Julian
name: Chua, Yansong
name: Zhang, Shaomin
name: Zenke, Friedemann
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Diffusion Tempering Improves Parameter Estimation with Probabilistic Integrators for Hodgkin Huxley Models
Creators: name: Beck, Jonas
name: Bosch, Nathanael
name: Deistler, Michael
name: Khadim, Kyra L.
name: Macke, Jakob H.
name: Hennig, Philipp
name: Berens, Philipp
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Fast radio bursts: the last sign of supramassive neutron stars
Creators: name: Falcke, Heino
name: Rezzolla, Luciano
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Several fast radio bursts have been discovered recently, showing a bright, highly dispersed millisecond radio pulse. The pulses do not repeat and are not associated with a known pulsar or gamma-ray burst. The high dispersion suggests sources at cosmological distances, hence implying an extremely high radio luminosity, far larger than the power of single pulses from a pulsar. We suggest that a fast radio burst represents the final signal of a supramassive rotating neutron star that collapses to a black hole due to magnetic braking. The neutron star is initially above the critical mass for non-rotating models and is supported by rapid rotation. As magnetic braking constantly reduces the spin, the neutron star will suddenly collapse to a black hole several thousand to million years after its birth. We discuss several formation scenarios for supramassive neutron stars and estimate the possible observational signatures {making use of the results of recent numerical general-relativistic calculations. While the collapse will hide the stellar surface behind an event horizon, the magnetic-field lines will snap violently. This can turn an almost ordinary pulsar into a bright radio "blitzar": Accelerated electrons from the travelling magnetic shock dissipate a significant fraction of the magnetosphere and produce a massive radio burst that is observable out to z>0.7. Only a few percent of the neutron stars needs to be supramassive in order to explain the observed rate. We suggest that fast radio bursts might trace the solitary formation of stellar mass black holes at high redshifts. These bursts could be an electromagnetic complement to gravitational-wave emission and reveal a new formation and evolutionary channel for black holes that are not seen as gamma-ray bursts. Radio observations of these bursts could trace the core-collapse supernova rate throughout the universe.
description: Astronomy & Astrophysics, in press - 6 pages, 1 figure, revised after referee comments, slightly expanded, corrected numerical error in eq. 3, normalization of parameter f changed, abstract abridged
Self-mitigating Trotter circuits for SU(2) lattice gauge theory on a quantum computer
Creators: name: Rahman, Sarmed A
name: Lewis, Randy
name: Mendicelli, Emanuele
name: Powell, Sarah
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum computers offer the possibility to implement lattice gauge theory in Minkowski rather than Euclidean spacetime, thus allowing calculations of processes that evolve in real time. In this work, calculations within SU(2) pure gauge theory are able to show the motion of an excitation traveling across a spatial lattice in real time. This is accomplished by using a simple yet powerful method for error mitigation, where the original circuit is used both forward and backward in time. For a two-plaquette lattice, meaningful results are obtained from a circuit containing hundreds of CNOT gates. The same method is used for a five-plaquette lattice, where calculations show that residual systematic effects can be reduced through follow-up mitigation.
description: 12 pages, 10 figures, updated to match the Phys Rev D version
title: Nachruf Helmut F. Reichwald
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 43, Nr. 1 (2014), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Artificial magnetism for a harmonically trapped Fermi gas in a synthetic magnetic field
Creators: name: Biswas, Shyamal
name: Ghosh, Avijit
name: Majumder, Soumyadeep
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have analytically explored the artificial magnetism for a 3-D spin-polarized harmonically trapped ideal Fermi gas of electrically neutral particles exposed to a uniform synthetic magnetic field. Though polarization of the spin is necessary for trapping electrically neutral atoms in a magneto-optical trap, Pauli paramagnetism can not be studied for the spin-polarized Fermi system. However, it is possible to study Landau diamagnetism and de Haas-van Alphen effect for such a system. We have unified the artificial Landau diamagnetism and the artificial de Haas-van Alphen effect in a single framework for all temperatures as well as for all possible magnitudes of the synthetic magnetic field in the thermodynamic limit. Our prediction is testable in the present-day experimental setup for ultracold fermionic atoms in magneto-optical trap.
description: 7 pages, 3 figures
Interpreting the HI 21-cm cosmology maps through Largest Cluster Statistics -- I: Impact of the synthetic SKA1-Low observations
Creators: name: Dasgupta, Saswata
name: Pal, Samit Kumar
name: Bag, Satadru
name: Dutta, Sohini
name: Majumdar, Suman
name: Datta, Abhirup
name: Pathak, Aadarsh
name: Kamran, Mohd
name: Mondal, Rajesh
name: Sarkar, Prakash
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyse the evolution of the largest ionized region using the topological and morphological evolution of the redshifted 21-cm signal coming from the neutral hydrogen distribution during the different stages of reionization. For this analysis, we use the "Largest Cluster Statistics" - LCS. We mainly study the impact of the array synthesized beam on the LCS analysis of the 21-cm signal considering the upcoming low-frequency Square Kilometer Array (SKA1-Low) observations using a realistic simulation for such observation based on the 21cmE2E-pipeline using OSKAR. We find that bias in LCS estimation is introduced in synthetic observations due to the array beam. This in turn shifts the apparent percolation transition point towards the later stages of reionization. The biased estimates of LCS, occurring due to the effect of the lower resolution (lack of longer baselines) and the telescope synthesized beam will lead to a biased interpretation of the reionization history. This is important to note while interpreting any future 21-cm signal images from upcoming or future telescopes like the SKA, HERA, etc. We conclude that one may need denser $uv$-coverage at longer baselines for a better deconvolution of the array synthesized beam from the 21-cm images and a relatively unbiased estimate of LCS from such images.
description: 37 pages, 14 figures, Published in Journal of Cosmology and Astroparticle Physics (JCAP)
Unsupervised clustering of burst shapes reveals the increasing complexity of developing networks in vitro
Creators: name: Schäfer, Tim J.
name: Giannakakis, Emmanouil
name: Schmidt-Barbo, Paul
name: Levina, Anna
name: Vinogradov, Oleg
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Generalized Langevin equation with shear flow and its fluctuation-dissipation theorems derived from a Caldeira-Leggett Hamiltonian
Creators: name: Pelargonio, Sara
name: Zaccone, Alessio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We provide a first-principles derivation of the Langevin equation with shear flow and its corresponding fluctuation-dissipation theorems. Shear flow of simple fluids has been widely investigated by numerical simulations. Most studies postulate a Markovian Langevin equation with a simple shear drag term à la Stokes. However, this choice has never been justified from first principles. We start from a particle-bath system described by a classical Caldeira-Leggett Hamiltonian modified by adding a term proportional to the strain-rate tensor according to Hoover's DOLLS method, and we derive a generalized Langevin equation for the sheared system. We then compute, analytically, the noise time-correlation functions in different regimes. Based on the intensity of the shear-rate, we can distinguish between close-to-equilibrium and far-from-equilibrium states. According to the results presented here, the standard, simple and Markovian form of the Langevin equation with shear flow postulated in the literature is valid only in the limit of extremely weak shear rates compared to the effective vibrational temperature of the bath. For even marginally higher shear rates, the (generalized) Langevin equation is strongly non-Markovian and non-trivial fluctuation-dissipation theorems are derived.
Magnetic cooling and vibration isolation of a sub-kHz mechanical resonator
Creators: name: van Heck, Bernard
name: Fuchs, Tim
name: Plugge, Jaimy
name: Bosch, Wim A.
name: Oosterkamp, Tjerk H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report recent progress towards the realization of a sub-mK, low-vibration environment at the bottom stage of a dry dilution refrigerator for use in mechanical tests of quantum mechanics. Using adiabatic nuclear demagnetization, we have cooled a silicon cantilever force sensor to $T\approx 1$ mK. The temperature of the tip-holder of the cantilever chip was determined via a primary magnetic flux noise thermometer. The quality factor of the cantilever continues to increase with decreasing temperature, reaching $Q\approx 4\cdot 10^4$ at $2$ mK. To demonstrate that the vibration isolation is not compromised, we report the detection of the thermal motion of the cantilever down to $T \approx 20$ mK, only limited by the coupling to the SQUID readout circuit. We discuss feasible improvements that will allow us to probe unexplored regions of the parameter space of continuous spontaneous localization models.
description: Submission to the special issue "Mechanical Resonators at Low Temperatures" in Journal of Low Temperature Physics
A new index for characterizing micro-bead motion in a flow induced by ciliary beating: Part I, experimental analysis
Creators: name: Bottier, M
name: Blanchon, S
name: Pelle, G
name: Bequignon, E
name: Isabey, D
name: Coste, A
name: Escudier, E
name: Grotberg, JB
name: Papon, JF
name: Filoche, M
name: Louis, B
Publisher: name: Public Library of Science (PLoS)
Year: 2017
Subjects: Biological Clocks
Biological Transport, Active
Cilia
Computer Simulation
Humans
Image Interpretation, Computer-Assisted
Lung
Microfluidics
Microscopy, Video
Microspheres
Models, Biological
Mucociliary Clearance
Mucus
Respiratory Mucosa

description: Mucociliary clearance is one of the major lines of defense of the respiratory system. The mucus layer coating the pulmonary airways is moved along and out of the lung by the activity of motile cilia, thus expelling the particles trapped in it. Here we compare ex vivo measurements of a Newtonian flow induced by cilia beating (using micro-beads as tracers) and a mathematical model of this fluid flow, presented in greater detail in a second companion article. Samples of nasal epithelial cells placed in water are recorded by high-speed video-microscopy and ciliary beat pattern is inferred. Automatic tracking of micro-beads, used as markers of the flow generated by cilia motion, enables us also to assess the velocity profile as a function of the distance above the cilia. This profile is shown to be essentially parabolic. The obtained experimental data are used to feed a 2D mathematical and numerical model of the coupling between cilia, fluid, and micro-bead motion. From the model and the experimental measurements, the shear stress exerted by the cilia is deduced. Finally, this shear stress, which can easily be measured in the clinical setting, is proposed as a new index for characterizing the efficiency of ciliary beating.
title: Lean Library Management
Creators: name: Putnings, Markus
Publisher: name: University Library Heidelberg
Year: 2012

description: Die aktuellen Herausforderungen der Bibliothekswelt erfordern eine große persönliche Flexibilität, hierarchieübergreifende Gruppenarbeiten an Projekten und durch die zunehmende Zeit- und Mittelknappheit eine starke Effizienz- und Zielorientierung, die idealerweise die Wünsche und Bedürfnisse unserer Kunden nie aus den Augen verlieren sollte. Alle diese Aspekte werden durch Lean Management komplex abgedeckt – tatsächlich werden diese originär japanischen Erfolgskonzepte in der Praxis bereits stark eingesetzt, da sie sich als Best Practice durchgesetzt haben. Dieser Artikel gibt einen kurzen Überblick über die Hintergründe und Genese von Lean Management in der öffentlichen Verwaltung und im Bibliothekswesen, gefolgt von der Definition und den Konzepten des Lean Managements, sowie der speziellen Ausprägung des Lean Library Managements. Der Schwerpunkt liegt hierbei auf vielen praktischen Aspekten und Beispielen, die in das Tagesgeschäft übernommen werden können. Die Hürden für den Einsatz von Lean Management sind dabei im Gegensatz zu anderen betriebswirtschaftlichen Managementinstrumenten relativ niedrig. Es sind keine kostenintensiven IT-Systeme nötig, sondern es genügen ein unvoreingenommener Blick auf die eigenen Prozesse und Handgriffe und der (Veränderungs-)Wille, die entdeckten Verbesserungspotentiale zu nutzen. Der Artikel soll hierfür ein entsprechendes Bewusstsein schaffen.
description: Perspektive Bibliothek, Bd. 1, Nr. 2 (2012), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
Analytic results for a quantum quench from free to hard-core one dimensional bosons
Creators: name: Kormos, Márton
name: Collura, Mario
name: Calabrese, Pasquale
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is widely believed that the stationary properties after a quantum quench in integrable systems can be described by a generalized Gibbs ensemble (GGE), even if all the analytical evidence is based on free theories in which the pre- and post-quench modes are linearly related. In contrast, we consider the experimentally relevant quench of the one-dimensional Bose gas from zero to infinite interaction, in which the relation between modes is nonlinear, and consequently Wick's theorem does not hold. We provide exact analytical results for the time evolution of the dynamical density-density correlation function at any time after the quench and we prove that its stationary value is described by a GGE in which Wick's theorem is restored.
description: 10 pages, 2 figures
Non-isometric U-dualities
Creators: name: Blair, Chris D. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I study generalisations of U-duality transformations which do not rely on the existence of isometries. I start by providing more details of a recently proposed generalised U-duality map between solutions of type IIA supergravity of the form $\text{M}_7 \times \text{S}^3$, with NSNS flux, and solutions of 11-dimensional supergravity, in which the three-sphere is replaced by a four-dimensional geometry which encodes three-algebra structure constants. I then show that when $\text{M}_7$ admits two abelian isometries, TsT deformations on the IIA side become six-vector deformations in the 11-dimensional setting. These six-vector deformations involve an action of $\mathrm{E}_{6(6)}$ on both isometric and non-isometric directions. I discuss the algebraic interpretation of these deformations, and compare and contrast them with (generalised) Yang-Baxter deformations in supergravity.
description: 26 pages + appendices. Version 2: fixed typos and added references. Version 3: published version, more typos fixed
Phanaeus meleagris Blanchard 1846
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 meleagris

description: Phanaeus meleagris Blanchard, 1846 Recorded Distribution: BOLIVIA: Cochabamba — Chapare, La Paz — Omasuyos, Nor Yungas, Santa Cruz — Ichilo; COLOMBIA: Antioquia — Yolombó, El Carmen de Viboral, Arauca — Tame, Boyacá — Maripí, Pajarito, Caquetá — San Vicente del Caguán, San José del Fragua, Casanare — Aguazul, Cundinamarca — Medina, Meta — Restrepo, Nariño — Ipiales, Santander — El Carmen de Chucurí, ECUADOR: El Oro — Portovelo, Morona Santiago — Morona, Napo — El Chaco, Archidona, Pastaza — Mejía, Pastaza, Sucumbios — Gonzalo Pizarro, Tungurahua — Baños de Agua Santa, Zamora Chinchipe — El Pangui, Zamora, Nangaritza, Palanda, PERU: Cajamarca — San Ignacio, Cusco — Quispicanchi, Huánuco — Leoncio Prado, Junín — Chanchamayo, Loreto — Maynas, Pasco — Oxapampa, Ucayali — Padre Abad, VENEZUELA: Táchira — San Cristóbal. Altitude: from 228 to 3981 m a.s.l. Biomes: Montane Grasslands & Shrublands, Tropical & Subtropical Moist Broadleaf Forests. Ecorregions: NEOTROPIC: Central Andean wet puna, Venezuelan Andes montane forests, Magdalena Valley montane forests, Cordillera Oriental montane forests, Eastern Cordillera Real montane forests, Napo moist forests, Peruvian Yungas, Ucayali moist forests, Southwest Amazon moist forests, Bolivian Yungas. Predicted distribution: This species distributes from -18.39° to 11.21° latitude in an area of 524,842 Km2. Its predicted distribution has a mean annual temperature of 18.77-23.7° C with a maximum difference of temperature of 12.1° C during the year and mean precipitation of 1551-2886 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 page 18, DOI: 10.5281/zenodo.7387492
On the minimal faithful degree of Rhodes semisimple semigroups
Creators: name: Margolis, Stuart
name: Steinberg, Benjamin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20M30, 20M20

description: In this paper we compute the minimum degree of a faithful representation by partial transformations of a finite semigroup admitting a faithful completely reducible matrix representation over the field of complex numbers. This includes all inverse semigroups, and hence our results generalize earlier results of Easdown and Schein on the minimal faithful degree of an inverse semigroup. It also includes well-studied monoids like full matrix monoids over finite fields and the monoid of binary relations (i.e., matrices over the Boolean semiring). Our answer reduces the computation to considerations of permutation representations of maximal subgroups that are faithful when restricted to distinguished normal subgroups. This is analogous to (and inspired by) recent results of the second author on the minimal number of irreducible constituents in a faithful completely reducible complex matrix representation of a finite semigroup that admits one. To illustrate what happens when a finite semigroup does not admit a faithful completely reducible representation, we compute the minimum faithful degree of the opposite monoid of the full transformation monoid.
description: The title used "minimum faithful degree" and the running header used "minimal faithful degree". To avoid mis-citations, we changed all occurrences of minimum degree to minimal degree, which seems to be the standard terminology in group theory anyway. We have corrected some details related to the outer automorphism of the symmetric group on 6 elements in Theorem 2.19
Appendix S1 from Irrigated urban trees exhibit greater functional trait plasticity compared to natural stand analogues
Creators: name: Ibsen, Peter
name: Santiago, Louis
name: Shiflett, Sheri
name: Chandler, Mark
name: Jenerette, G. Darrel
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology

description: Sample Processing Methods
title: Zur Rezeption archäologischer Ausstellungen in Schulbüchern und anderen didaktischen Medien
Creators: name: Sénécheau, Miriam
Publisher: name: University Library Heidelberg
Year: 2014

description: Im Geschichtsunterricht eingesetzte Medien zur Ur- und Frühgeschichte werden in der Regel nicht von Archäologen verfaßt oder hergestellt, sondern mehrheitlich von Lehrern oder Lehrerausbildern. Um sich zu informieren oder um Material übernehmen zu können, greifen die Autoren von Schulbüchern, Handreichungen, Filmen etc. unter anderem auf Ausstellungen in Museen, auf Freilichtmuseen oder auf Ausstellungskataloge zurück. Der Aufsatz untersucht anhand ausgewählter Beispiele Stellenwert und Funktion der Institution Museum in didaktischen Medien.
description: Media for the teaching of prehistory at German schools are not usually written by archaeologists, but rather by teachers or teacher trainers. Archaeological exhibitions and m u s e u m catalogues may be used as a resource for information and material by authors of schoolbooks, workbook s etc. and by producers of didactic Videos. This article examines the role of museums in this context.
Strong Planck constraints on braneworld and non-commutative inflation
Creators: name: Calcagni, Gianluca
name: Kuroyanagi, Sachiko
name: Ohashi, Junko
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We place observational likelihood constraints on braneworld and non-commutative inflation for a number of inflaton potentials, using Planck, WMAP polarization and BAO data. Both braneworld and non-commutative scenarios of the kind considered here are limited by the most recent data even more severely than standard general-relativity models. At more than 95 % confidence level, the monomial potential $V(ϕ) \propto ϕ^p$ is ruled out for $p \geq 2$ in the Randall--Sundrum (RS) braneworld cosmology and, for $p>0$, also in the high-curvature limit of the Gauss--Bonnet (GB) braneworld and in the infrared limit of non-commutative inflation, due to a large scalar spectral index. Some parameter values for natural inflation, small-varying inflaton models and Starobinsky inflation are allowed in all scenarios, although some tuning is required for natural inflation in a non-commutative spacetime.
description: 24 pages, 12 figures
title: Die Einführung von Leistungspunkten (Credits) und die Modularisierung von Studiengängen
Creators: name: Blankenburg, Dietrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Das Credit-System, oder Leistungspunktesystem, - bekannt von den amerikanischen Universitäten - wird nun auch an den Universitäten der Europäischen Union eingeführt. Grundbausteine der Studienordnungen für die Master- und Bachelorstudiengänge sind die sogenannten Module. Das neue System soll zu einer Vergleichbarkeit der Studienleistungen in Europa führen.
description: The Credit system, well known from American Universities, has now been introduced to the Universities of the European Union. Basic units of regulations on the conduct of Master and Bachelor examinations are the so-called modules. The new system shall guarantee a comprehensive level of examinations and degrees throughout Europe.
New constraints on cosmological modified gravity theories from anisotropic three-point correlation functions of BOSS DR12 galaxies
Creators: name: Sugiyama, Naonori S.
name: Yamauchi, Daisuke
name: Kobayashi, Tsutomu
name: Fujita, Tomohiro
name: Arai, Shun
name: Hirano, Shin'ichi
name: Saito, Shun
name: Beutler, Florian
name: Seo, Hee-Jong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report a new test of modified gravity theories using the large-scale structure of the Universe. This paper is the first attempt to (1) apply a joint analysis of the anisotropic components of galaxy two- and three-point correlation functions (2 and 3PCFs) to actual galaxy data and (2) constrain the nonlinear effects of degenerate higher-order scalar-tensor (DHOST) theories on cosmological scales. Applying this analysis to the Baryon Oscillation Spectroscopic Survey (BOSS) data release 12, we obtain the lower bounds of $-1.655 < ξ_{\rm t}$ and $-0.504 < ξ_{\rm s}$ at the $95\%$ confidence level on the parameters characterising the time evolution of the tidal and shift terms of the second-order velocity field. These constraints are consistent with GR predictions of $ξ_{\rm t}=15/1144$ and $ξ_{\rm s}=0$. Moreover, they represent a $35$-fold and $20$-fold improvement, respectively, over the joint analysis with only the isotropic 3PCF. We ensure the validity of our results by investigating various quantities, including theoretical models of the 3PCF, window function corrections, cumulative ${\rm S/N}$, Fisher matrices, and statistical scattering effects of mock simulation data. We also find statistically significant discrepancies between the BOSS data and the Patchy mocks for the 3PCF measurement. Finally, we package all of our 3PCF analysis codes under the name \textsc{HITOMI} and make them publicly available so that readers can reproduce all the results of this paper and easily apply them to ongoing future galaxy surveys.
description: 60 pages, 21 figures, 22 tables; a set of codes for data analysis is publicly available at https://github.com/naonori/hitomi.git
title: Datenstrukturen zur Analyse archäologischer Schichten
Creators: name: Herzog, Irmela
Publisher: name: University Library Heidelberg
Year: 2014

description: Die Harris -Matrix ist eine bewährte Methode , um archäologische Schichten zu analysieren. Dabei ist es das Ziel, die relative chronologische Abfolge der Schichten zu rekonstruieren. Mathematisch gesehen handelt es sich bei den Schichten mit den zugehörigen stratigraphischen Beziehungen um eine Halbordnung. Das bedeutet für den Archäologen, daß alle zusätzlich vorhandenen
Datierungsinformationen berücksichtigt w erden sollten, um die chronologische Reihenfolge der Schichten so genau wie möglich zu rekonstruieren. In diesem Aufsatz werden Datenstrukturen für die stratigraphischen Daten und die Zusatzinformationen diskutiert. Verschiedene Ansätze werden vorgestellt, die nichtstratigraphische Daten beim Layout des Harris-Diagramms berücksichtigen.
description: The Harris matrix is a well established method to analyse archaeological stratigraphy, the aim is to reconstruct the relative chronology of the stratigraphic units. Mathematically speaking, the contexts and their stratigraphic relationships form a partially ordered set, that means for the archaeologist that all available additional dating information should be taken into account in order to reconstruct
the chronological sequence of the contexts as exactly as possible. This paper discusses data structures for dealing with stratigraphic data including the additional information which might be available. Several approaches to use nonstratigraphic chronological data in Harris diagram layout are presented.
Coherent states and geometry on the Siegel-Jacobi disk
Creators: name: Berceanu, Stefan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81R30, 32Q15, 53C22, 81V80, 81S10

description: The coherent state representation of the Jacobi group $G^J_1$ is indexed with two parameters, $μ(=\frac{1}{\hbar})$, describing the part coming from the Heisenberg group, and $k$, characterizing the positive discrete series representation of $\text{SU}(1,1)$. The Ricci form, the scalar curvature and the geodesics of the Siegel-Jacobi disk $\mathcal{D}^J_1$ are investigated. The significance in the language of coherent states of the transform which realizes the fundamental conjecture on the Siegel-Jacobi disk is emphasized. The Berezin kernel, Calabi's diastasis, the Kobayashi embedding, and the Cauchy formula for the Sigel-Jacobi disk are presented.
Consistency between ordering and clustering methods for graphs
Creators: name: Kawamoto, Tatsuro
name: Ochi, Masaki
name: Kobayashi, Teruyoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: A relational dataset is often analyzed by optimally assigning a label to each element through clustering or ordering. While similar characterizations of a dataset would be achieved by both clustering and ordering methods, the former has been studied much more actively than the latter, particularly for the data represented as graphs. This study fills this gap by investigating methodological relationships between several clustering and ordering methods, focusing on spectral techniques. Furthermore, we evaluate the resulting performance of the clustering and ordering methods. To this end, we propose a measure called the label continuity error, which generically quantifies the degree of consistency between a sequence and partition for a set of elements. Based on synthetic and real-world datasets, we evaluate the extents to which an ordering method identifies a module structure and a clustering method identifies a banded structure.
description: 30 pages, 26 figures
Continual learning using dendritic modulations on view-invariant feedforward weights
Creators: name: Tran, Viet Anh Khoa
name: Neftci, Emre O.
name: Wybo, Willem A.M.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Investigating the role of recurrent connectivity in connectome-constrained and task-optimized models of the fruit fly’s motion pathway
Creators: name: Stefanidi, Zinovia
name: Lappalainen, Janne K.
name: Turaga, Srinivas C.
name: Macke, Jakob H.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Data analysis, machine learning and neuroinformatics

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
The confining trailing string
Creators: name: Kiritsis, E.
name: Mazzanti, L.
name: Nitti, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the holographic trailing string picture of a heavy quark to the case of a bulk geometry dual to a confining gauge theory. We compute the classical trailing confining string solution for a static as well as a uniformly moving quark. The trailing string is infinitely extended and approaches a confining horizon, situated at a critical value of the radial coordinate, along one of the space-time directions, breaking boundary rotational invariance. We compute the equations for the fluctuations around the classical solutions, which are used to obtain boundary force correlators controlling the Langevin dynamics of the quark. The imaginary part of the correlators has a non-trivial low-frequency limit, which gives rise to a viscous friction coefficient induced by the confining vacuum. The vacuum correlators are used to define finite-temperature dressed Langevin correlators with an appropriate high-frequency behavior.
description: 63 pages plus appendices, 19 figures; version accepted for publication in JHEP
Maximum Likelihood Training of Implicit Nonlinear Diffusion Models
Creators: name: Kim, Dongjun
name: Na, Byeonghu
name: Kwon, Se Jung
name: Lee, Dongsoo
name: Kang, Wanmo
name: Moon, Il-Chul
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Whereas diverse variations of diffusion models exist, extending the linear diffusion into a nonlinear diffusion process is investigated by very few works. The nonlinearity effect has been hardly understood, but intuitively, there would be promising diffusion patterns to efficiently train the generative distribution towards the data distribution. This paper introduces a data-adaptive nonlinear diffusion process for score-based diffusion models. The proposed Implicit Nonlinear Diffusion Model (INDM) learns by combining a normalizing flow and a diffusion process. Specifically, INDM implicitly constructs a nonlinear diffusion on the \textit{data space} by leveraging a linear diffusion on the \textit{latent space} through a flow network. This flow network is key to forming a nonlinear diffusion, as the nonlinearity depends on the flow network. This flexible nonlinearity improves the learning curve of INDM to nearly Maximum Likelihood Estimation (MLE) against the non-MLE curve of DDPM++, which turns out to be an inflexible version of INDM with the flow fixed as an identity mapping. Also, the discretization of INDM shows the sampling robustness. In experiments, INDM achieves the state-of-the-art FID of 1.75 on CelebA. We release our code at https://github.com/byeonghu-na/INDM.
title: Jan C. Besteman, Jurjen M. Bos, Danny A. Gerrets, H. Anthonie Heidinga u n d Jan de Koning (Hrsg.): The excavations at Wijnaldum. Reports on Frisia in roman and medieval times, 1999
Creators: name: Siegmund, Frank
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Jan C. Besteman, Jurjen M. Bos, Danny A. Gerrets, H. Anthonie Heidinga u n d Jan de Koning (Hrsg.): The excavations at Wijnaldum. Reports on Frisia in roman and medieval times. Band 1. Balkema, Rotterdam 1999. 343 Seiten, zahlreiche Abbildungen
Quantum modified Regge-Teitelboim cosmology
Creators: name: Cordero, Rubén
name: Cruz, Miguel
name: Molgado, Alberto
name: Rojas, Efraín
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The canonical quantization of the modified geodetic brane cosmology which is implemented from the Regge-Teitelboim model and the trace of the extrinsic curvature of the brane trajectory, K, is developed. As a second-order derivative model, on the grounds of the Ostrogradski Hamiltonian method and the Dirac's scheme for constrained systems, we find suitable first- and second-class constraints which allow for a proper quantization. We also find that the first-class constraints obey a sort of truncated Virasoro algebra. The effective quantum potential emerging in our approach is exhaustively studied where it shows that an embryonic epoch is still present. The quantum nucleation is sketched where we observe that it is driven by an effective cosmological constant.
description: 11 pages, 3 figures. Erratum on one of the institutional addresses. Some minor changes
Discrimination of Coherent States via Atom-Field Interaction without Rotation Wave Approximation
Creators: name: Zhang, Jin-Hua
name: Zhang, Fu-Lin
name: Liang, Mai-Lin
name: Wang, Zhi-Xi
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum state discrimination is an important part of quantum information processing. We investigate the discrimination of coherent states through Jaynes-Cummings (JC) model interaction between the field and the ancilla without rotation wave approximation (RWA). We show that the minimum failure probability can be reduced as RWA is eliminated from JC model and the non-RWA terms accompanied by the quantum effects of fields (e.g. the virtual photon process in the JC model without RWA) can enhance the state discrimination. The JC model without RWA for unambiguous state discrimination is superior to ambiguous state discrimination, particularly when the number of sequential measurements increases. Unambiguous state discrimination implemented via the non-RWA JC model is beneficial to saving resource cost.
description: 8 pages, 4 figures
title: Renate Wörner: Das alamannische Ortsgräberfeld von Oberndorf-Beffendorf, Kreis Rottweil, 1999
Creators: name: Siegmund, Frank
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Renate Wörner: Das alamannische Ortsgräberfeld von OberndorfBeffendorf, Kreis Rottweil. Materialhefte zur Archäologie in BadenWürttemberg, Band 44. Konrad Theiss Verlag, Stuttgart 1999. 244 Seiten,
11 Abbildungen, 6 Tabellen, 75 Tafeln. ISBN 3806214255