cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Non-local Lagrangian bias
Creators: name: Sheth, Ravi K.
name: Chan, Kwan Chuen
name: Scoccimarro, Roman
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Halos are biased tracers of the dark matter distribution. It is often assumed that the patches from which halos formed are locally biased with respect to the initial fluctuation field, meaning that the halo-patch fluctuation field can be written as a Taylor series in that of the dark matter. If quantities other than the local density influence halo formation, then this Lagrangian bias will generically be nonlocal; the Taylor series must be performed with respect to these other variables as well. We illustrate the effect with Monte-Carlo simulations of a model in which halo formation depends on the local shear (the quadrupole of perturbation theory), and provide an analytic model which provides a good description of our results. Our model, which extends the excursion set approach to walks in more than one dimension, works both when steps in the walk are uncorrelated, as well as when there are correlations between steps. For walks with correlated steps, our model includes two distinct types of nonlocality: one is due to the fact that the initial density profile around a patch which is destined to form a halo must fall sufficiently steeply around it -- this introduces k-dependence to even the linear bias factor, but otherwise only affects the monopole of the clustering signal. The other is due to the surrounding shear field; this affects the quadratic and higher order bias factors, and introduces an angular dependence to the clustering signal. In both cases, our analysis shows that these nonlocal Lagrangian bias terms can be significant, particularly for massive halos; they must be accounted for in analyses of higher order clustering such as the halo bispectrum in Lagrangian or Eulerian space. Although we illustrate these effects using halos, our analysis and conclusions also apply to the other constituents of the cosmic web -- filaments, sheets and voids.
description: 13 pages, 6 figures; new section shows agreement with bispectrum measurements in simulations
Multi-user quantum key distribution with collective eavesdropping detection over collective-noise channels
Creators: name: Huang, Wei
name: Wen, Qiao-Yan
name: Liu, Bin
name: Gao, Fei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A multi-user quantum key distribution protocol is proposed with single particles and the collective eavesdropping detection strategy on a star network. By utilizing this protocol, any two users of the network can accomplish quantum key distribution with the help of a serving center. Due to the utilization of collective eavesdropping detection strategy, the users of the protocol just need have the ability of performing certain unitary operations. Furthermore, we present three fault-tolerant versions of the proposed protocol, which can combat with the errors over different collective-noise channels. The security of all the proposed protocols is guaranteed by the theorems on quantum operation discrimination.
description: 10 pages, 3 figures,1 table / Revised according to the reviewers' comments / Changed title / Near to the published version
Inferring Implicit 3D Representations from Human Figures on Pictorial Maps
Creators: name: Schnürer, Raimund
name: Öztireli, A. Cengiz
name: Heitzler, Magnus
name: Sieber, René
name: Hurni, Lorenz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work, we present an automated workflow to bring human figures, one of the most frequently appearing entities on pictorial maps, to the third dimension. Our workflow is based on training data and neural networks for single-view 3D reconstruction of real humans from photos. We first let a network consisting of fully connected layers estimate the depth coordinate of 2D pose points. The gained 3D pose points are inputted together with 2D masks of body parts into a deep implicit surface network to infer 3D signed distance fields (SDFs). By assembling all body parts, we derive 2D depth images and body part masks of the whole figure for different views, which are fed into a fully convolutional network to predict UV images. These UV images and the texture for the given perspective are inserted into a generative network to inpaint the textures for the other views. The textures are enhanced by a cartoonization network and facial details are resynthesized by an autoencoder. Finally, the generated textures are assigned to the inferred body parts in a ray marcher. We test our workflow with 12 pictorial human figures after having validated several network configurations. The created 3D models look generally promising, especially when considering the challenges of silhouette-based 3D recovery and real-time rendering of the implicit SDFs. Further improvement is needed to reduce gaps between the body parts and to add pictorial details to the textures. Overall, the constructed figures may be used for animation and storytelling in digital 3D maps.
description: to be published in 'Cartography and Geographic Information Science'
Recurrence and transience for suspension flows
Creators: name: Iommi, Godofredo
name: Jordan, Thomas
name: Todd, Mike
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study the thermodynamic formalism for suspension flows over countable Markov shifts with roof functions not necessarily bounded away from zero. We establish conditions to ensure the existence and uniqueness of equilibrium measures for regular potentials. We define the notions of recurrence and transience of a potential in this setting. We define the "renewal flow", which is a symbolic model for a class of flows with diverse recurrence features. We study the corresponding thermodynamic formalism, establishing conditions for the existence of equilibrium measures and phase transitions. Applications are given to suspension flows defined over interval maps having parabolic fixed points.
description: In this version of the paper some typos have been corrected and some references updated. Note that the former title of this paper was "Parabolic suspension flows"
Compatibility of Fruits and Vegetables During Transport in Mixed Loads
Creators: name: Lipton, Werner J.
name: Harvey, John M.
name: Lipton, Werner J.
name: Harvey, John M.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Shippers or receivers of fresh fruits and vegetables frequently prefer to handle shipments that consist of more than one commodity, the so-called mixers. In mixed loads, it is important to combine only those commodities that are compatible with respect to their requirements for (1) temperature, (2) modified atmosphere, (3) relative humidity, and (4) protection from odors or (5) from physiologically active gases, such as ethylene. To facilitate the choice of compatible crops and to help avoid shipments of undesirable combinations, we have prepared the ensuing compatibility tables in which about 85 crops are placed into nine compatibility groups. All factors enumerated above were considered in the groupings. Compatible commodities are those that can be shipped together without adverse effects on any one of them during the usual maximum transit period for the most perishable commodity in the load. Compatibility does not imply that crops in the same group now normally are, or likely will be, shipped together, but merely that they may be shipped together if circumstances demand it.
Neue pollenanalytisch-stratigraphische Untersuchungen zum Pflug von Walle
Creators: name: Overbeck, Fritz
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 19 (1950): Nachrichten aus Niedersachsens Urgeschichte
Buschor, Ernst, Griechische Vasen
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Buschor, Ernst, Griechische Vasen. Verlag R. Piper & Co., München 1940. 80. 272 S. mit 282 Abb.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 19 (1950): Nachrichten aus Niedersachsens Urgeschichte
Identifying Experts in Question & Answer Portals: A Case Study on Data Science Competencies in Reddit
Creators: name: Strukova, Sofia
name: Ruipérez-Valiente, José A.
name: Mármol, Félix Gómez
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The irreplaceable key to the triumph of Question & Answer (Q&A) platforms is their users providing high-quality answers to the challenging questions posted across various topics of interest. From more than a decade, the expert finding problem attracted much attention in information retrieval research. Based on the encountered gaps in the expert identification across several Q&A portals, we inspect the feasibility of identifying data science experts in Reddit. Our method is based on the manual coding results where two data science experts labelled not only expert and non-expert comments, but also out-of-scope comments, which is a novel contribution to the literature, enabling the identification of more groups of comments across web portals. We present a semi-supervised approach which combines 1,113 labelled comments with 100,226 unlabelled comments during training. The proposed model uses the activity behaviour of every user, including Natural Language Processing (NLP), crowdsourced and user feature sets. We conclude that the NLP and user feature sets contribute the most to the better identification of these three classes. It means that this method can generalise well within the domain. Finally, we make a novel contribution by presenting different types of users in Reddit, which opens many future research directions.
Transit Refrigeration of Perishables in Overseas Van Container Shipments
Creators: name: Harris, C. Max
name: Hinds, Russell H.
name: Harris, C. Max
name: Hinds, Russell H.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: honeydew melons
subject: oranges
subject: lettuce
subject: quality
subject: controlled atmosphere
subject: transit refrigeration

description: Transit times for shipments of lettuce, oranges, and honeydew melons, made by ocean carrier from California to Japan and Hong Kong, were 10 and 15 days, respectively. Refrigerated van containers with constant air circulation through the load and a mechanism for reducing refrigeration capacity as the temperature approached the thermostat set point had an average temperature spread of only 2° Fahrenheit (1.1° Celsius) throughout the load from the second day of transit until arrival at destination ports. In two other refrigeration systems without these features, temperature variation throughout the loads averaged 4° F (2° C) and 10° F (6° C) during the same time period. The carbon dioxide levels averaged about 2 percent in the two van loads of oranges and ranged from 0.5 to 1.5 percent in the remaining containers during shipment. A van container designed to maintain controlled atmospheres during transit failed to hold the oxygen concentration at 5 percent, as intended. Arrival quality of the lettuce and honeydew melons was impaired because of variation in maturity of individual heads or melons within cartons, which resulted in physical damage to the lettuce and an excessively wide range of degree of ripeness of the melons.
Trumping and Power Majorization
Creators: name: Kribs, David W.
name: Pereira, Rajesh
name: Plosker, Sarah
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 15A39 (Primary), 26D15, 81P68 (Secondary)

description: Majorization is a basic concept in matrix theory that has found applications in numerous settings over the past century. Power majorization is a more specialized notion that has been studied in the theory of inequalities. On the other hand, the trumping relation has recently been considered in quantum information, specifically in entanglement theory. We explore the connections between trumping and power majorization. We prove an analogue of Rado's theorem for power majorization and consider a number of examples.
description: 8 pages
Lettuce Temperatures in a Van Container with a Reverse Airflow Circulation System
Creators: name: Hinsch, R. Tom
name: Hinds, Russell H.
name: Goddard, William F.
name: Hinsch, R. Tom
name: Hinds, Russell H.
name: Goddard, William F.
Publisher: name: Unknown
Year: 1978
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Approximately 70 percent of the western iceberg lettuce production presently moves to market by truck-trailer in tightly stacked loads. Lettuce cartons are tightly stacked to provide the trucker a maximum payload, since lettuce is a relatively low-density product. The purpose of this study was to determine if lettuce would be maintained at or near recommended transit temperatures in a refrigerated trailer equipped with a reverse airflow circulation system that forces air vertically through a tight-stacked load, rather than around its perimeter.
Nonequilibrium magnons from hot electrons in antiferromagnetic systems
Creators: name: Barbeau, Marion M. S.
name: Titov, Mikhail
name: Katsnelson, Mikhail I.
name: Qaiumzadeh, Alireza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We describe a \emph{nonthermal} magnon activation mechanism in antiferromagnetic (AFM) systems via locally equilibrated \emph{spin-unpolarized} hot electrons excited by an ultrafast intense laser pulse. We employ a quantum kinetic equation that takes into account a direct electron-magnon scattering channel in either bulk AFM metal or at the interface of the AFM/normal-metal heterostructure. The mechanism is responsible for the nonequilibrium population of AFM magnon modes on a subnanosecond timescale, which are formed shortly after the local thermalization of hot electrons by Coulomb interactions. Nonequilibrium magnon populations can be additionally manipulated by applying an external magnetic field. Our work paves the way toward spin dynamics control in AFM systems via the ultrafast manipulation of out-of-equilibrium magnon excitations.
description: 5.5 pages, 3 figures, Supplemental Material available as ancillary file
Firbas, Franz: Spät- und nacheiszeitliche Waldgeschichte Mitteleuropas nördlich der Alpen. I. Band
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Firbas, Franz: Spät- und nacheiszeitliche Waldgeschichte Mitteleuropas nördlich der Alpen. I. Band. Allgemeine Waldgeschichte. 8°. 480 S. mit 163 Abb. im Text. Jena 1949. Gustav Fischer
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 19 (1950): Nachrichten aus Niedersachsens Urgeschichte
Data-Driven Blind Synchronization and Interference Rejection for Digital Communication Signals
Creators: name: Lancho, Alejandro
name: Weiss, Amir
name: Lee, Gary C. F.
name: Tang, Jennifer
name: Bu, Yuheng
name: Polyanskiy, Yury
name: Wornell, Gregory W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We study the potential of data-driven deep learning methods for separation of two communication signals from an observation of their mixture. In particular, we assume knowledge on the generation process of one of the signals, dubbed signal of interest (SOI), and no knowledge on the generation process of the second signal, referred to as interference. This form of the single-channel source separation problem is also referred to as interference rejection. We show that capturing high-resolution temporal structures (nonstationarities), which enables accurate synchronization to both the SOI and the interference, leads to substantial performance gains. With this key insight, we propose a domain-informed neural network (NN) design that is able to improve upon both "off-the-shelf" NNs and classical detection and interference rejection methods, as demonstrated in our simulations. Our findings highlight the key role communication-specific domain knowledge plays in the development of data-driven approaches that hold the promise of unprecedented gains.
description: 9 pages, 6 figures, accepted at IEEE GLOBECOM 2022 (this version contains extended proofs)
Cabibbo-Kobayashi-Maskawa matrix: parameterizations and rephasing invariants
Creators: name: Pérez, Hilario
name: Kielanowski, P.
name: W, S. R. Juárez
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The paper is devoted to a discussion of general properties of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. First we propose a general method of a recursive construction of the CKM matrix for any number of generations. This allows to set up a parameterization with desired properties. As an application we generalize the Wolfenstein parameterization to the case of 4 generations and obtain restrictions on the CKM suppression of the fourth generation. Motivated by the rephasing invariance of the CKM observables we next consider the general phase invariant monomials built out of the CKM matrix elements and their conjugates. We show, that there exist 30 fundamental phase invariant monomials and 18 of them are a product of 4 CKM matrix elements and 12 are a product of 6 CKM matrix elements. In the Main Theorem we show that all rephasing invariant monomials can be expressed as a product of at most 5 factors: 4 of them are fundamental phase invariant monomials and the fifth factor consists of powers of squares of absolute values of the CKM matrix elements.
description: 24 pages
Kosmopoulos, Leslie Walker: The Prehistoric Inhabitation of Corinth
Creators: name: Jacob-Friesen, Gernot
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Kosmopoulos, Leslie Walker: The Prehistoric Inhabitation of Corinth. Vol. I. Münchner Verlag, bisher F. Bruckmann, 1948. XXII und 73 S. 51 Textabb. sowie 4 farbige Tafeln
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 19 (1950): Nachrichten aus Niedersachsens Urgeschichte
Endbronzezeitliche Pflanzenfunde aus Harsefeld, Ldkr. Stade
Creators: name: Klooß, Stefanie
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 75 (2006): Nachrichten aus Niedersachsens Urgeschichte
Transit Temperatures and Arrival Condition of California Lettuce and Table Grapes Shipped to the Far East
Creators: name: Harris, C. Max
name: Harvey, John M.
name: Harris, C. Max
name: Harvey, John M.
Publisher: name: Unknown
Year: 1978
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Export of lettuce and table grapes from California to Far Eastern markets has increased steadily over the last 10 years. As the volume of exported commodities increases, the need to reduce losses and maintain quality during ocean transport be- comes increasingly important. The specific objectives of our shipping test with lettuce were as follows: (1) to determine transit temperatures in van container loads of lettuce; (2) to measure O2 and C02 levels in lettuce loads, with and without initial atmosphere modification; (3) to determine the effects of these variables on the arrival condition of the product; and (4) to observe general handling techniques used in transit and in foreign distribution systems. The objectives of the grape test were as follows: (1) to measure transit temperatures in palletized loads of grapes packed in the polystyrene foam boxes, (2) to determine O2 and C02 levels in palletized loads of grapes, (3) to determine the amount of berry shatter and decay on arrival, and (4) to observe general handling techniques and distribution methods at destination.
Rainer Kuhn, Heiko Brandl, Leonard Helten u. Franz Jäger, Aufgedeckt. Ein neuer ottonischer Kirchenbau am Magdeburger Domplatz
Creators: name: Heine, Hans-Wilhelm
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Rainer Kuhn, Heiko Brandl, Leonard Helten u. Franz Jäger, Aufgedeckt. Ein neuer ottonischer Kirchenbau am Magdeburger Domplatz. Hrsg. v. H. Meller u. W. Schenkluhn. Archäologie in Sachsen-Anhalt, Sonderband 3. Halle (Saale): Landesamt für Denkmalpflege und Archäologie. Landesmuseum für Vorgeschichte 2005. 111 Seiten mit 127 überwiegend farbigen Abbildungen. davon 1 als Farbbeilage. Kartoniert. ISBN 3-910010-87-3. ISSN 0075-2932
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 75 (2006): Nachrichten aus Niedersachsens Urgeschichte
Lower bound of Ricci flow's existence time
Creators: name: Xu, Guoyi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 53C44, 35K45

description: Let $(M^n, g)$ be a compact $n$-dim ($n\geq 2$) manifold with nonnegative Ricci curvature, and if $n\geq 3$ we assume that $(M^n, g)\times \mathbb{R}$ has nonnegative isotropic curvature. The lower bound of the Ricci flow's existence time on $(M^n, g)$ is proved. This provides an alternative proof for the uniform lower bound of a family of closed Ricci flows' maximal existence times, which was firstly proved by E. Cabezas-Rivas and B. Wilking. We also get an interior curvature estimates for $n= 3$ under $Rc\geq 0$ assumption among others. Combining these results, we proved the short time existence of the Ricci flow on a large class of $3$-dim open manifolds, which admit some suitable exhaustion covering and have nonnegative Ricci curvature.
description: 13 pages, to appear on Bulletin of the London Mathematical Society
BPS States in Omega Background and Integrability
Creators: name: Bulycheva, Kseniya
name: Chen, Heng-yu
name: Gorsky, Alexander
name: Koroteev, Peter
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We reconsider string and domain wall central charges in N=2 supersymmetric gauge theories in four dimensions in presence of the Omega background in the Nekrasov-Shatashvili (NS) limit. Existence of these charges entails presence of the corresponding topological defects in the theory - vortices and domain walls. In spirit of the 4d/2d duality we discuss the worldsheet low energy effective theory living on the BPS vortex in N=2 Supersymmetric Quantum Chromodynamics (SQCD). We discuss some aspects of the brane realization of the dualities between various quantum integrable models. A chain of such dualities enables us to check the AGT correspondence in the NS limit.
description: 48 pages, 10 figures, minor changes, references added, typos corrected
An arithmetic intersection formula for denominators of Igusa class polynomials
Creators: name: Lauter, Kristin
name: Viray, Bianca
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G15, 11G10

description: In this paper we prove an explicit formula for the arithmetic intersection number (CM(K).G1)_{\ell} on the Siegel moduli space of abelian surfaces, generalizing the work of Bruinier-Yang and Yang. These intersection numbers allow one to compute the denominators of Igusa class polynomials, which has important applications to the construction of genus 2 curves for use in cryptography. Bruinier and Yang conjectured a formula for intersection numbers on an arithmetic Hilbert modular surface, and as a consequence obtained a conjectural formula for the intersection number (CM(K).G1)_{\ell} under strong assumptions on the ramification of the primitive quartic CM field K. Yang later proved this conjecture assuming that O_K is freely generated by one element over the ring of integers of the real quadratic subfield. In this paper, we prove a formula for (CM(K).G1)_{\ell} for more general primitive quartic CM fields, and we use a different method of proof than Yang. We prove a tight bound on this intersection number which holds for all primitive quartic CM fields. As a consequence, we obtain a formula for a multiple of the denominators of the Igusa class polynomials for an arbitrary primitive quartic CM field. Our proof entails studying the Embedding Problem posed by Goren and Lauter and counting solutions using our previous article that generalized work of Gross-Zagier and Dorman to arbitrary discriminants.
description: 30 pages. Minor edits
Nonlinear dynamics of asymmetric bistable energy harvesters
Creators: name: Norenberg, João Pedro
name: Luo, Roberto
name: Lopes, Vinicius Goncaalves
name: Peterson, João Victor L. L.
name: Cunha, Americo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.6.3
subject: 37N15

description: The paper investigates asymmetries effects over a nonlinear vibration energy harvester dynamics. The asymmetric system performance is compared with symmetric ones. Different asymmetry levels on restoring force and gravity action are investigated from a system-sloping angle variation. Bifurcation diagrams and basins of attraction are used to examine the local and global characteristics underlying dynamical systems under different excitation energy. The results show the adverse effects of asymmetries on system dynamics. They also reveal ways to overcome them by canceling asymmetric influence from optimal sloping angle values and improving asymmetric system performance over symmetrical ones. This comprehensive numerical study provides novel valuable insights into asymmetrical energy harvester dynamics, a wide and still less explored topic.
Transition Amplitudes in 3D Quantum Gravity: Boundaries and Holography in the Coloured Boulatov Model
Creators: name: Goeller, Christophe
name: Oriti, Daniele
name: Schmid, Gabriel
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider transition amplitudes in the coloured simplicial Boulatov model for three-dimensional Riemannian quantum gravity. First, we discuss aspects of the topology of coloured graphs with non-empty boundaries. Using a modification of the standard rooting procedure of coloured tensor models, we then write transition amplitudes systematically as topological expansions. We analyse the transition amplitudes for the simplest boundary topology, the 2-sphere, and prove that they factorize into a sum entirely given by the combinatorics of the boundary spin network state and that the leading order is given by graphs representing the closed 3-ball in the large N limit. This is the first step towards a more detailed study of the holographic nature of coloured Boulatov-type GFT models for topological field theories and quantum gravity.
description: 42+15 pages, 28+14 figures; revised version matching article published in Annales Henri Poincar\'e
Wiktor A. Daszewski, Corpus of Mosaics from Egypt 1. Hellenistic and Early Roman Period
Creators: name: Dunbabin, Katherine M. D.
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Wiktor A. Daszewski, Corpus of Mosaics from Egypt 1. Hellenistic and Early Roman Period. Aegyptiaca Treveriensia. Trierer Studien zum griechisch-römischen Ägypten 3. Verlag Philipp von Zabern, Mainz 1985. VIII, 211 pages, 46 plates, 4 colour plates.
description: Bonner Jahrbücher, Bd. 187.1987: Bonner Jahrbücher
MPEC 2023-W108 : 2023 WR2
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 WR2

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.
Gernot Piccottini, Die kultischen und mythologischen Reliefs des Stadtgebietes von Virunum
Creators: name: Bauchhenß, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Gernot Piccottini, Die kultischen und mythologischen Reliefs des Stadtgebietes von Virunum. Corpus Signorum Imperii Romani. Österreich II 4. Verlag der Österreichischen Akademie der Wissenschaften, Wien 1984. 84 Seiten, 38 Tafeln
description: Bonner Jahrbücher, Bd. 187.1987: Bonner Jahrbücher
Hermann Reichert, Lexikon der altgermanischen Namen 1. Text
Creators: name: Rüger, Christoph B.
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Hermann Reichert, Lexikon der altgermanischen Namen 1. Text. Schriftenreihe der Kommission für Altgermanistik der Österreichischen Akademie der Wissenschaften, Thesaurus Palaeo Germanicus 1. Verlag der Österreichischen Akademie der Wissenschaften, Wien 1987. XXXI, 843 Seiten
description: Bonner Jahrbücher, Bd. 187.1987: Bonner Jahrbücher
Natural Language Processing Methods to Identify Oncology Patients at High Risk for Acute Care with Clinical Notes
Creators: name: Fanconi, Claudio
name: van Buchem, Marieke
name: Hernandez-Boussard, Tina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Clinical notes are an essential component of a health record. This paper evaluates how natural language processing (NLP) can be used to identify the risk of acute care use (ACU) in oncology patients, once chemotherapy starts. Risk prediction using structured health data (SHD) is now standard, but predictions using free-text formats are complex. This paper explores the use of free-text notes for the prediction of ACU instead of SHD. Deep Learning models were compared to manually engineered language features. Results show that SHD models minimally outperform NLP models; an l1-penalised logistic regression with SHD achieved a C-statistic of 0.748 (95%-CI: 0.735, 0.762), while the same model with language features achieved 0.730 (95%-CI: 0.717, 0.745) and a transformer-based model achieved 0.702 (95%-CI: 0.688, 0.717). This paper shows how language models can be used in clinical applications and underlines how risk bias is different for diverse patient groups, even using only free-text data.
description: 11 pages, 6 figures, 2 tables
Adaptive MCMC with online relabeling
Creators: name: Bardenet, Rémi
name: Cappé, Olivier
name: Fort, Gersende
name: Kégl, Balázs
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computation (stat.CO)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: When targeting a distribution that is artificially invariant under some permutations, Markov chain Monte Carlo (MCMC) algorithms face the label-switching problem, rendering marginal inference particularly cumbersome. Such a situation arises, for example, in the Bayesian analysis of finite mixture models. Adaptive MCMC algorithms such as adaptive Metropolis (AM), which self-calibrates its proposal distribution using an online estimate of the covariance matrix of the target, are no exception. To address the label-switching issue, relabeling algorithms associate a permutation to each MCMC sample, trying to obtain reasonable marginals. In the case of adaptive Metropolis (Bernoulli 7 (2001) 223-242), an online relabeling strategy is required. This paper is devoted to the AMOR algorithm, a provably consistent variant of AM that can cope with the label-switching problem. The idea is to nest relabeling steps within the MCMC algorithm based on the estimation of a single covariance matrix that is used both for adapting the covariance of the proposal distribution in the Metropolis algorithm step and for online relabeling. We compare the behavior of AMOR to similar relabeling methods. In the case of compactly supported target distributions, we prove a strong law of large numbers for AMOR and its ergodicity. These are the first results on the consistency of an online relabeling algorithm to our knowledge. The proof underlines latent relations between relabeling and vector quantization.
description: Published at http://dx.doi.org/10.3150/13-BEJ578 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Gerd Steinwascher, Die Zisterzienserstadthöfe in Köln
Creators: name: Gechter, Marianne
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Gerd Steinwascher, Die Zisterzienserstadthöfe in Köln. Joh. Heider Druckerei und Verlag, Bergisch Gladbach 1981. 254 Seiten, 10 Karten, 16 Abbildungen
description: Bonner Jahrbücher, Bd. 187.1987: Bonner Jahrbücher
The Asymmetric Quantum Cloning Region
Creators: name: Nechita, Ion
name: Pellegrini, Clément
name: Rochette, Denis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum cloning is a fundamental protocol of quantum information theory. Perfect universal quantum cloning is prohibited by the laws of quantum mechanics, only imperfect copies being reachable. Symmetric quantum cloning is concerned with case when the quality of the clones is identical. In this work, we study the general case of $1 \to N$ asymmetric cloning, where one asks for arbitrary qualities of the clones. We characterize, for all Hilbert space dimensions and number of clones, the set of all possible clone qualities. This set is realized as the nonnegative part of the unit ball of a newly introduced norm, which we call the $\mathcal{Q}$-norm. We also provide a closed form expression for the quantum cloner achieving a given clone quality vector. Our analysis relies on the Schur-Weyl duality and on the study of the spectral properties of partially transposed permutation operators.
Liouville theorems for stable Lane-Emden systems and biharmonic problems
Creators: name: Cowan, Craig
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We examine the elliptic system given by {equation} \label{system_abstract} -Δu = v^p, \qquad -Δv = u^θ, \qquad \{in} \IR^N, {equation} for $ 1 < p \le θ$ and the fourth order scalar equation {equation} \label{fourth_abstract} Δ^2 u = u^θ, \qquad \{in $ \IR^N$,} {equation} where $ 1 < θ$. We prove various Liouville type theorems for positive stable solutions. For instance we show there are no positive stable solutions of (\ref{system_abstract}) (resp. (\ref{fourth_abstract})) provided $ N \le 10$ and $ 2 \le p \le θ$ (resp. $ N \le 10$ and $1 < θ$). Results for higher dimensions are also obtained. These results regarding stable solutions on the full space imply various Liouville theorems for positive (possibly unstable) bounded solutions of {equation} \label{eq_half_abstract} -Δu = v^p, \qquad -Δv = u^θ, \qquad \{in} \IR^{N-1}, {equation} with $ u=v=0$ on $ \partial \IR^N_+$. In particular there is no positive bounded solution of (\ref{eq_half_abstract}) for any $ 2 \le p \le θ$ if $ N \le 11$. Higher dimensional results are also obtained.
description: This version 3 is essentially the same as version 2 but has added references of various recent related works
Archäologische und naturwissenschaftliche Beiträge zu einem römischen Brunnensediment aus der rheinischen Lößbörde
Creators: name: Gaitzsch, Wolfgang
name: Knörzer, Karl-Heinz
name: Köhler, Frank
name: Kokabi, Mostefa
name: Meurers-Balke, Jutta
name: Neyses, Mechthild
name: Radermacher, Heinz
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Primordial Black Hole Formation in Starobinsky's Linear Potential Model
Creators: name: Pi, Shi
name: Wang, Jianing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the power spectrum of the comoving curvature perturbation $\cal R$ in the model that glues two linear potentials of different slopes, originally proposed by Starobinsky. We find that the enhanced power spectrum reaches its maximum at the wavenumber which is $π$ times the junction scale. The peak is $\sim2.61$ times larger than the ultraviolet plateau. We also show that its near-peak behavior can be well approximated by a constant-roll model, once we define the effective ultra-slow-roll $e$-folding number appropriately by considering the contribution from non-single-clock phase only. Such an abrupt transition to non-attractor phase can leave some interesting characteristic features in the energy spectrum of the scalar-induced gravitational waves, which are detectable in the space-borne interferometers if the primordial black holes generated at such a high peak are all the dark matter.
description: 45 pages, 8 figures
An old approach to the giant component problem
Creators: name: Bollobas, Bela
name: Riordan, Oliver
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 05C80, 60J80

description: In 1998, Molloy and Reed showed that, under suitable conditions, if a sequence of degree sequences converges to a probability distribution $D$, then the size of the largest component in corresponding $n$-vertex random graph is asymptotically $ρ(D)n$, where $ρ(D)$ is a constant defined by the solution to certain equations that can be interpreted as the survival probability of a branching process associated to $D$. There have been a number of papers strengthening this result in various ways; here we prove a strong form of the result (with exponential bounds on the probability of large deviations) under minimal conditions.
description: 24 pages; only minor changes
Ammonium acetate mediated simple, rapid, and one-pot multicomponent synthesis of spirooxindole derivatives
Creators: name: Raheja, Barkha K.
name: Dalal, Dipak S.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Synthesis of spirooxindole derivatives was achieved by combining Knoevenagel condensation and Michael addition between isatin, malononitrile, and dimedone or cyclohexan-1,3-dione in presence of ammonium acetate by simple stirring in ethanol at room temperature. Spirooxindole derivatives possess promising biological activities like antitumor, antifungal, antimalarial, and anti-HIV. The analytically pure spirooxindoles formed in a concise reaction time without recrystallization or column chromatography. This method is safe and avoids the use of toxic chemicals and excess consumption of energy.
A Note on Entanglement Entropy for Primary Fermion Fields in JT Gravity
Creators: name: Guo, Chang-Zhong
name: Gan, Wen-Cong
name: Shu, Fu-Wen
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we analyse and discuss 2D Jackiw-Teitelboim (JT) gravity coupled to primary fermion fields in asymptotically anti-de Sitter (AdS) spacetimes. We get a particular solution of the massless Dirac field outside the extremal black hole horizon and find the solution for the dilaton in JT gravity. Two dimensional JT gravity spacetime is conformally flat, we calculate the two point correlators of primary fermion fields under the Weyl transformations. The key point of this work is to present a standard technique which is called resolvent rather than CFT methods. We redefine the fields in terms of the conformal factor as the fermion fields, and we use the resolvent technique to derive the renormalized entanglement entropy for massless Dirac fields in JT gravity.
description: 15 pages, 3 figures; improvements to presentation, new content added in appendix to comment about the correlator trace formula of primary fermion fields, published version in CPC
Gymnotus carapo Linnaeus 1758
Creators: name: Giora, Júlia
name: Burns, John R.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Gymnotiformes
Gymnotidae
Gymnotus
Gymnotus carapo

description: Spermatozoa of Gymnotus aff. carapo
- Gymnotidae
The spermatozoa of Gymnotus aff. carapo are comprised of a head (Fig. 2A) containing a spherical nucleus (Fig. 2C), a well defined midpiece (Fig. 2 C-E) and a single flagellum (Fig. 2 A-B-C-E). Nuclear diameter is approximately 1.9 µm. Nuclear chromatin is condensed and granular (Fig. 2 B-C). The nucleus does not appear to undergo rotation during spermiogenesis, thus resulting in a centriolar complex and flagellum that are lateral to the nucleus (Fig. 2 B-C). The nucleus is indented by a double, shallow, and strongly eccentric nuclear fossa (Fig. 2B). The proximal centriole is anterior and perpendicular to the distal centriole, both are associated with electron-dense spurs and other material, and both are located to one side of the nucleus completely outside the nuclear fossa (Fig. 2 B-C). The midpiece contains spherical to elongate mitochondria irregularly distributed, and abundant vesicles, most of which are concentrated in the posterior portion of midpiece (Fig. 2 C-E). Many of these vesicles are elongate and often contain electron-dense material. The midpiece also contains a short cytoplasmic canal immediately posterior to the distal centriole (Fig. 2 B-E), but this appears to close more posteriorly. The single flagellum has a 9 + 2 microtubular axoneme which does not show intratubular differentiation (Fig. 2D). The flagellum lacks lateral projections or fins (Fig. 2D). Some irregularly arranged accessory microtubules were present in the cytoplasm of the midpiece, but these were not evident on all micrographs.
description: Published as part of Giora, Júlia & Burns, John R., 2011, Sperm ultrastructure in three different families of weakly electric fishes (Teleostei: Gymnotiformes), pp. 881-888 in Neotropical Ichthyology 9 (4) on page 882, DOI: 10.1590/S1679-62252011005000047, http://zenodo.org/record/5756622
Impact of substrates and quantum effects on exciton line shapes of 2D semiconductors at room temperature
Creators: name: van de Groep, Jorik
name: Li, Qitong
name: Song, Jung-Hwan
name: Kik, Pieter G.
name: Brongersma, Mark L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Exciton resonances in monolayer transition-metal dichalcogenides (TMDs) provide exceptionally strong light-matter interaction at room temperature. Their spectral line shape is critical in the design of a myriad of optoelectronic devices, ranging from solar cells to quantum information processing. However, disorder resulting from static inhomogeneities and dynamical fluctuations can significantly impact the line shape. Many recent works experimentally evaluate the optical properties of TMD monolayers placed on a substrate and the line shape is typically linked directly to the material's quality. Here, we highlight that the interference of the substrate and TMD reflections can strongly influence the line shape. We further show how basic, room-temperature reflection measurement allow investigation of the quantum mechanical exciton dynamics by systematically controlling the substrate reflection with index-matching oils. By removing the substrate contribution with a properly chosen oil, we can extract the excitonic decay rates including the quantum mechanical dephasing rate. The results provide valuable guidance for the engineering of exciton line shapes in layered nanophotonic systems.
An analytic model for interacting dark energy and its observational constraints
Creators: name: Pan, Supriya
name: Bhattacharya, Subhra
name: Chakraborty, Subenoy
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The paper deals with a theoretical model for interacting dark energy. The interaction between the cold dark matter (dust) and the dark energy has been assumed to be non-gravitational in nature. Exact analytic cosmological solutions are obtained both for constant and variable equation of state for dark energy. It is found that, for very small value of the coupling parameter (in the interaction term), the model asymptotically extends up to $Λ$CDM, while the model can enter into the phantom domain asymptotically, if the coupling parameter is not so small. Both the solutions are then analyzed with 194 Supernovae Type Ia data. The best fit parameters are shown with 1$σ$ and 2$σ$ confidence intervals. Finally, we have discussed the cosmographic parameters for both the cases.
description: 14 pages, 7 figures, Published version
Polynomial tractability for integration in an unweighted function space with absolutely convergent Fourier series
Creators: name: Goda, Takashi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this note, we prove that the following function space with absolutely convergent Fourier series \[ F_d:=\left\{ f\in L^2([0,1)^d)\:\middle| \: \|f\|:=\sum_{\boldsymbol{k}\in \mathbb{Z}^d}|\hat{f}(\boldsymbol{k})| \max\left(1,\min_{j\in \mathrm{supp}(\boldsymbol{k})}\log |k_j|\right) <\infty \right\}\] with $\hat{f}(\boldsymbol{k})$ being the $\boldsymbol{k}$-th Fourier coefficient of $f$ and $\mathrm{supp}(\boldsymbol{k}):=\{j\in \{1,\ldots,d\}\mid k_j\neq 0\}$ is polynomially tractable for multivariate integration in the worst-case setting. Here polynomial tractability means that the minimum number of function evaluations required to make the worst-case error less than or equal to a tolerance $\varepsilon$ grows only polynomially with respect to $\varepsilon^{-1}$ and $d$. It is important to remark that the function space $F_d$ is unweighted, that is, all variables contribute equally to the norm of functions. Our tractability result is in contrast to those for most of the unweighted integration problems studied in the literature, in which polynomial tractability does not hold and the problem suffers from the curse of dimensionality. Our proof is constructive in the sense that we provide an explicit quasi-Monte Carlo rule that attains a desired worst-case error bound.
description: minor correction, 9 pages