cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discovery and Timing of Millisecond Pulsars with the Arecibo 327 MHz Drift-Scan Survey
Creators: name: Lewis, Evan F.
name: Olszanski, Timothy E. E.
name: Deneva, Julia S.
name: Freire, Paulo C. C.
name: McLaughlin, Maura A.
name: Stovall, Kevin
name: Bagchi, Manjari
name: Martinez, Jose G.
name: Perera, Benetge B. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the discovery and timing solutions of four millisecond pulsars (MSPs) discovered in the Arecibo 327 MHz Drift-Scan Pulsar Survey. Three of these pulsars are in binary systems, consisting of a redback (PSR J2055+1545), a black widow (PSR J1630+3550), and a neutron star-white dwarf binary (PSR J2116+1345). The fourth MSP, PSR J2212+2450, is isolated. We present the multiyear timing solutions as well as polarization properties across a range of radio frequencies for each pulsar. We perform a multiwavelength search for emission from these systems and find an optical counterpart for PSR J2055+1545 in Gaia DR3, as well as a gamma-ray counterpart for PSR J2116+1345 with the Fermi-LAT telescope. Despite the close colocation of PSR J2055+1545 with a Fermi source, we are unable to detect gamma-ray pulsations, likely due to the large orbital variability of the system. This work presents the first two binaries found by this survey with orbital periods shorter than a day; we expect to find more in the 40% of the survey data that have yet to be searched.
description: 22 pages, 11 figures, 4 tables. Published in ApJ
Constraints on axion-nucleon coupling constants from measuring the Casimir force between corrugated surfaces
Creators: name: Bezerra, V. B.
name: Klimchitskaya, G. L.
name: Mostepanenko, V. M.
name: Romero, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain stronger laboratory constraints on the coupling constants of axion-like particles to nucleons from measurements of the normal and lateral Casimir forces between sinusoidally corrugated surfaces of a sphere and a plate. For this purpose, the normal and lateral additional force arising in the experimental configurations due to two-axion exchange between protons and neutrons are calculated. Our constraints following from measurements of the normal and lateral Casimir forces are stronger than the laboratory constraints reported so far for masses of axion-like particles larger than 11eV and 8eV, respectively. A comparison between various laboratory constraints on the coupling constants of axion-like particles to nucleons obtained from the magnetometer measurements, Eotvos- and Cavendish-type experiments, and from the Casimir effect is performed over the wide range of masses of axion-like particles from 10^{-10}eV to 20eV.
description: 21 pages, 3 figures, to appear in Phys. Rev. D
About a Family of ALF Instantons with Conical Singularities
Creators: name: Biquard, Olivier
name: Gauduchon, Paul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We apply the techniques developed in our previous article to describe some interesting families of ALF gravitational instantons with conical singularities. In particular, we completely understand the 5-dimensional family of Chen-Teo metrics and prove that only 4-dimensional subfamilies can be smoothly compactified so that the metric has conical singularities.
FE-simulated bearing load distributions for different load cases of the IWT7.5 turbine
Creators: name: Schleich, Florian
name: Menck, Oliver
Publisher: name: Fraunhofer-Gesellschaft
Year: 2020
Subjects: subject: wind turbine
subject: blade bearing
subject: pitch bearing
subject: IWT 7.5
subject: load distribution
subject: DDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften

description: This dataset contains the bearing load distributions of different load cases of a third rotor star FE-model of the IWES Wind Turbine 7.5, which is a 7.5 MW nearshore turbine model. Using combinations of the resulting blade moment, the angle of said moment, and the pitch angle of the blade, a total of 260 simulations were FE simulated. These simulations were performed for the publication "Fatigue lifetime calculation of wind turbine blade bearings considering blade-dependent load distribution" in the Wind Energy Science Journal.
Region-based motion-compensated iterative reconstruction technique for dynamic computed tomography
Creators: name: Nguyen, Anh-Tuan
name: Renders, Jens
name: Sijbers, Jan
name: De Beenhouwer, Jan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Current state-of-the-art motion-based dynamic computed tomography reconstruction techniques estimate the deformation by considering motion models in the entire object volume although occasionally the proper change is local. In this article, we address this issue by introducing the region-based Motion-compensated Iterative Reconstruction Technique (rMIRT). It aims to accurately reconstruct the object being locally deformed during the scan, while identifying the deformed regions consistently with the motion models. Moreover, the motion parameters that correspond to the deformation in those areas are also estimated. In order to achieve these goals, we consider a mathematical optimization problem whose objective function depends on the reconstruction, the deformed regions and the motion parameters. The derivatives towards all of them are formulated analytically, which allows for efficient reconstruction using gradient-based optimizers. To the best of our knowledge, this is the first iterative reconstruction method in dynamic CT that exploits the analytical derivative towards the deformed regions.
description: Accepted at ISBI 2023
Swissness im Call-Center?! Führt Ähnlichkeit zwischen Agent und Kunde zu grösserem Erfolg eines Calls und zu einer besseren Wahrnehmung der Marke?
Creators: name: Feige, Stephan
name: Annen, Raphael
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Markenführung
subject: Swissness
subject: Call-Center
subject: Sprache
subject: Dialekt
subject: HWZ Working Paper Series
subject: Marketing & Business Communications

description: Die vorliegende Studie untersucht die Einstellung der Schweizer Bevölkerung gegenüber der gesprochenen Sprache in Call-Centern sowie den Einfluss der Ähnlichkeit zwischen Kunde und Agent (Fit) auf bestimmte Erfolgsgrössen. Für die Untersuchung wurden 991 Personen befragt. Nach einem ersten Call-Center-Gespräch mit einem Agenten wurde der Gesprächspartner im Anschluss nochmals angerufen bzw. weitergeleitet und zu dem vorhergehenden Call befragt. Die Ergebnisse zeigen, dass die Befragten in der Studie, entgegen der öffentlichen Wahrnehmung, mit der sich Call-Center häufig konfrontiert sehen, eine hohe Zufriedenheit mit den Calls ausweisen. Kundinnen und Kunden erwarten von Schweizer Unternehmen, dass diese mit Call-Centern aus der Schweiz arbeiten und sie mit einem Call-Center-Agenten Schweizerdeutsch sprechen können, sind allerdings auch flexibel, wenn dies einmal nicht so ist. Die Bedeutung der Sprache im Call-Center unterscheidet sich zudem zwischen Inbound- und Outbound-Call-Centern, wobei die Sprache bei Outbound-Anrufen nochmals einen höheren Stellenwert einnimmt. Zudem legen ältere Personen mehr Wert auf den Schweizer Dialekt, als jüngere dies tun. Insbesondere ältere Personen können mit Schweizerdeutsch besser «abgeholt» werden und ein potenzielles Gespräch ist erfolgversprechender. Eine Wirkung des Fits zwischen Kunde und Call-Center-Agent in Bezug zu Geschlecht, Alter und Sprache auf den Erfolg des Calls und die Wahrnehmung der Marke konnte nicht nachgewiesen werden. Die Daten zeigen allerdings eine Anpassung der Einstellung gegenüber der gesprochenen Sprache im Call-Center nach einem positiven Erlebnis mit einem Hochdeutsch sprechenden Agenten. Die Befragten werden offener gegenüber der gesprochenen Sprache und zeigen sich flexibler.
Improving Response to Mail Surveys of Farmers and Ranchers
Creators: name: Bosecker, Raymond R.
name: Faulkenberry, G. David.
name: Tortora, Robert D.
name: Bosecker, Raymond R.
name: Faulkenberry, G. David.
name: Tortora, Robert D.
Publisher: name: Unknown
Year: 1978
Subjects: Crop Production/Industries
Research Methods/ Statistical Methods

description: Excerpts from the report Introduction: The Economics, Statistics, and Cooperatives Service (ESCS) has a vital interest in obtaining and maintaining a high response rate to mail surveys. Each usable questionnaire returned by mail in probability surveys saves money by avoiding a telephone call or personal interview, and higher response rates in nonprobability mail surveys provide more information about the population of interest. This study was designed to continue and expand the research of ESCS into ways for improving mail survey response rates. The survey used for testing alternative approaches was the Fall Acreage and Production (A&P) survey. It is a general purpose, nonprobability survey that provides indications of change in year-to-year crop production and provides information on the distribution of State totals among districts and counties within the State. The success of this survey is dependent upon 1) a group of consistent reporters whose reports can be matched from year to year, and 2) a large number of total reports to provide for small area statistics.
B. Sutilist bacteria segmentation - Widefield microscopy - 2D UNet
Creators: name: De Mariscal, Estibaliz Gomez
Publisher: name: Zenodo
Year: 2022
Subjects: bioimage.io
bioimage.io:model
zerocostdl4mic
segmentation
2d
unet
bacillus-subtilis
fluorescence-light-microscopy
cells
semantic-segmentation
bacteria
microbiology

description: Download RDF Package
Visit https://github.com/HenriquesLab/ZeroCostDL4Mic/wiki
description: This trained 2D U-Net model segments the contour, foreground and background of Bacillus Subtilis bacteria imaged with Widefield microscopy images. The current segmentation enables running further watershed segmentation to obtain a unique label for each individual bacteria detected in the image. (Uploaded via https://bioimage.io)
Discovery of the Magellanic Stellar Stream Out to 100 Kiloparsecs
Creators: name: Chandra, Vedant
name: Naidu, Rohan P.
name: Conroy, Charlie
name: Bonaca, Ana
name: Zaritsky, Dennis
name: Cargile, Phillip A.
name: Caldwell, Nelson
name: Johnson, Benjamin D.
name: Han, Jiwon Jesse
name: Ting, Yuan-Sen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Magellanic Stream (MS) - an enormous ribbon of gas spanning $140^\circ$ of the southern sky trailing the Magellanic Clouds - has been exquisitely mapped in the five decades since its discovery. However, despite concerted efforts, no stellar counterpart to the MS has been conclusively identified. This stellar stream would reveal the distance and 6D kinematics of the MS, constraining its formation and the past orbital history of the Clouds. We have been conducting a spectroscopic survey of the most distant and luminous red giant stars in the Galactic outskirts. From this dataset, we have discovered a prominent population of 13 stars matching the extreme angular momentum of the Clouds, spanning up to $100^\circ$ along the MS at distances of $60-120$ kpc. Furthermore, these kinemetically-selected stars lie along a [$α$/Fe]-deficient track in chemical space from $-2.5 < \mathrm{[Fe/H]} < -0.5$, consistent with their formation in the Clouds themselves. We identify these stars as high-confidence members of the Magellanic Stellar Stream. Half of these stars are metal-rich and closely follow the gaseous MS, whereas the other half are more scattered and metal-poor. We argue that the metal-rich stream is the recently-formed tidal counterpart to the MS, and speculate that the metal-poor population was thrown out of the SMC outskirts during an earlier interaction between the Clouds. The Magellanic Stellar Stream provides a strong set of constraints - distances, 6D kinematics, and birth locations - that will guide future simulations towards unveiling the detailed history of the Clouds.
description: 21 pages, 12 figures. Submitted to ApJ
B. Sutilist bacteria segmentation - Widefield microscopy - 2D UNet
Creators: name: De Mariscal, Estibaliz Gomez
Publisher: name: Zenodo
Year: 2023
Subjects: bioimage.io
bioimage.io:model
zerocostdl4mic
segmentation
2d
unet
bacillus-subtilis
fluorescence-light-microscopy
cells
semantic-segmentation
bacteria
microbiology

description: Download RDF Package

description: This trained 2D U-Net model segments the contour, foreground and background of Bacillus Subtilis bacteria imaged with Widefield microscopy images. The current segmentation enables running further watershed segmentation to obtain a unique label for each individual bacteria detected in the image. (Uploaded via https://bioimage.io)
The Evryscope: the first full-sky gigapixel-scale telescope
Creators: name: Law, Nicholas M.
name: Fors, Octavi
name: Wulfken, Philip
name: Ratzloff, Jeffrey
name: Kavanaugh, Dustin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Current time-domain wide-field sky surveys generally operate with few-degree-sized fields and take many individual images to cover large sky areas each night. We present the design and project status of the Evryscope ("wide-seer"), which takes a different approach: using an array of 7cm telescopes to form a single wide-field-of-view pointed at every part of the accessible sky simultaneously and continuously. The Evryscope is a gigapixel-scale imager with a 9060 sq. deg. field of view and has an etendue three times larger than the Pan-STARRS sky survey. The system will search for transiting exoplanets around bright stars, M-dwarfs and white dwarfs, as well as detecting microlensing events, nearby supernovae, and gamma-ray burst afterglows. We present the current project status, including an update on the Evryscope prototype telescopes we have been operating for the last three years in the Canadian High Arctic.
description: 9 pages, 5 figures, presented at SPIE Astronomical Telescopes + Instrumentation
Observation of brane parity order in programmable optical lattices
Creators: name: Wei, David
name: Adler, Daniel
name: Srakaew, Kritsana
name: Agrawal, Suchita
name: Weckesser, Pascal
name: Bloch, Immanuel
name: Zeiher, Johannes
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The Mott-insulating phase of the two-dimensional (2d) Bose-Hubbard model is expected to be characterized by a non-local brane parity order. Parity order captures the presence of microscopic particle-hole fluctuations and entanglement, whose properties depend on the underlying lattice geometry. We realize 2d Bose-Hubbard models in dynamically tunable lattice geometries, using neutral atoms in a novel passively phase-stable tunable optical lattice in combination with programmable site-blocking potentials. We benchmark the performance of our system by single-particle quantum walks in the square, triangular, kagome and Lieb lattice. In the strongly correlated regime, we microscopically characterize the geometry dependence of the quantum fluctuations and experimentally validate the brane parity as a proxy for the non-local order parameter signaling the superfluid-to-Mott insulating phase transition.
description: Fixed typos and formatting
Leveraging Natural Learning Processing to Uncover Themes in Clinical Notes of Patients Admitted for Heart Failure
Creators: name: Agarwal, A
name: Thirunarayan, K
name: Romine, WL
name: Alambo, A
name: Cajita, Maan Isabella
name: Banerjee, T
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: Heart failure occurs when the heart is not able to pump blood and oxygen to support other organs in the body as it should. Treatments include medications and sometimes hospitalization. Patients with heart failure can have both cardiovascular as well as non-cardiovascular comorbidities. Clinical notes of patients with heart failure can be analyzed to gain insight into the topics discussed in these notes and the major comorbidities in these patients. In this regard, we apply machine learning techniques, such as topic modeling, to identify the major themes found in the clinical notes specific to the procedures performed on 1,200 patients admitted for heart failure at the University of Illinois Hospital and Health Sciences System (UI Health). Topic modeling revealed five hidden themes in these clinical notes, including one related to heart disease comorbidities.
A Two-Queue Polling Model with Two Priority Levels in the First Queue
Creators: name: Boon, Marko
name: Adan, Ivo
name: Boxma, Onno
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Performance (cs.PF)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper we consider a single-server cyclic polling system consisting of two queues. Between visits to successive queues, the server is delayed by a random switch-over time. Two types of customers arrive at the first queue: high and low priority customers. For this situation the following service disciplines are considered: gated, globally gated, and exhaustive. We study the cycle time distribution, the waiting times for each customer type, the joint queue length distribution at polling epochs, and the steady-state marginal queue length distributions for each customer type.
description: A shorter version of this paper appeared in the proceedings of ValueTools 2008. The present paper is an extended version, selected for publication in JDEDS
Einstimmiges Psalmbuch, Das ist, Dr. Ambrosij Lobwassers Psalmen Davids
Creators: name: Keller, Johann Rudolf
name: Spreng, Johann Jacob
Publisher: name: in Hoch-Oberkeitl. Druckerey
Year: 1756

description: Auserlesene und geistreiche Fest- Buß- Und Abendmahl-Gesänge Zum Gebrauch der Bernerischen Kirche, Die nach alten und neuen Singweisen können gesungen werden
description: Transponiert durch Johann-Ulrich Sulzberger/ weyland Direct. Mus. und Zinkenisten Loblicher Stadt Bern. Mit Verbesserung der undeutlichen Redens-Arten, und neuen Fest-Gesängen. Worbey eine kurze Musicalische Unterweisung , sam[m]t etlichen schönen Gebätten enthalten
description: Berner Kirchengesangbuch
description: Gemäss Fluri stammen die Festgesänge zum grossen Teil von Johann Rudolf Keller und Johann Jacob Spreng
description: Festgesänge mit eigener Titelseite
description: Bernerwappen auf beiden Titelseiten
description: Die Illustration ist ein Frontispiz mit dem Vermerk: "Bern, bey Gabriel Gaudard. 1745."
description: Exlibris auf vorderem Spiegel: "Ad. Fluri"; handschriftlicher Besitzvermerk auf erstem vorderem fliegendem Vorsatzblatt verso: "Elisabed Ochsenbein von Schdäfissburg und Wonhaft in Trub [...] 1841"; weiterer Besitzvermerk auf zweitem hinterem fliegendem Vorsatzblatt recto: "Elisabeth Ochsenbein von Stäfisburg in"
Backpropagation of Unrolled Solvers with Folded Optimization
Creators: name: Kotary, James
name: Dinh, My H.
name: Fioretto, Ferdinando
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The integration of constrained optimization models as components in deep networks has led to promising advances on many specialized learning tasks. A central challenge in this setting is backpropagation through the solution of an optimization problem, which typically lacks a closed form. One typical strategy is algorithm unrolling, which relies on automatic differentiation through the operations of an iterative solver. While flexible and general, unrolling can encounter accuracy and efficiency issues in practice. These issues can be avoided by analytical differentiation of the optimization, but current frameworks impose rigid requirements on the optimization problem's form. This paper provides theoretical insights into the backward pass of unrolled optimization, leading to a system for generating efficiently solvable analytical models of backpropagation. Additionally, it proposes a unifying view of unrolling and analytical differentiation through optimization mappings. Experiments over various model-based learning tasks demonstrate the advantages of the approach both computationally and in terms of enhanced expressiveness.
description: Published in IJCAI
Conditioned stochastic particle systems and integrable quantum spin systems
Creators: name: Schütz, Gunter M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary: 82C22, Secondary: 60K35, 60F10

description: We consider from a microscopic perspective large deviation properties of several stochastic interacting particle systems, using their mapping to integrable quantum spin systems. A brief review of recent work is given and several new results are presented: (i) For the general disordered symmectric exclusion process (SEP) on some finite lattice conditioned on no jumps into some absorbing sublattice and with initial Bernoulli product measure with density $ρ$ we prove that the probability $S_ρ(t)$ of no absorption event up to microscopic time $t$ can be expressed in terms of the generating function for the particle number of a SEP with particle injection and empty initial lattice. Specifically, for the symmetric simple exclusion process on $\mathbb Z$ conditioned on no jumps into the origin we obtain the explicit first and second order expansion in $ρ$ of $S_ρ(t)$ and also to first order in $ρ$ the optimal microscopic density profile under this conditioning. For the disordered ASEP on the finite torus conditioned on a very large current we show that the effective dynamics that optimally realizes this rare event does not depend on the disorder, except for the time scale. For annihilating and coalescing random walkers we obtain the generating function of the number of annihilated particles up to time $t$, which turns out to exhibit some universal features.
description: 25 pages
B. Sutilist bacteria segmentation - Widefield microscopy - 2D UNet
Creators: name: De Mariscal, Estibaliz Gómez
Publisher: name: Zenodo
Year: 2023
Subjects: bioimage.io
bioimage.io:model
zerocostdl4mic
deepimagej
segmentation
unet
semantic-segmentation
cells
fluorescence-light-microscopy
bacillus-subtilis
deepbacs
2d
tensorflow
microbiology
bacteria

description: Download RDF Package
 Fine tune the model with your data* https://github.com/HenriquesLab/ZeroCostDL4Mic/wiki/BioImage-Model-Zoo Visit https://github.com/HenriquesLab/ZeroCostDL4Mic/wiki for further general information.
description: This trained 2D U-Net model segments the contour, foreground and background of Bacillus Subtilis bacteria imaged with Widefield microscopy images. To obtain a unique label for each individual bacteria detected in the image one could run further watershed segmentation using the label 1 as the seed. (Uploaded via https://bioimage.io)
Zero-temperature stochastic Ising model on planar quasi-transitive graphs
Creators: name: De Santis, Emilio
name: Lelli, Leonardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82C20, 82C35

description: We study the zero-temperature stochastic Ising model on some connected planar quasi-transitive graphs, which are invariant under rotation and translation. The initial spin configuration is distributed according to a Bernoulli product measure with parameter $ p\in(0,1) $. In particular, we prove that if $ p=1/2 $ and the graph underlying the model satisfies the planar shrink property (which causes each finite cluster to shrink to a site and then vanish with positive probability) then all vertices flip infinitely often almost surely.
Extended linear-in-$T$ resistivity due to electron-phason scattering in moiré superlattices
Creators: name: Ochoa, Héctor
name: Fernandes, Rafael M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Due to its incommensurate nature, moiré superlattices host not only acoustic phonons but also another type of soft collective modes called phasons. Here, we investigate the impact of electron-phason scattering on the transport properties of moiré systems. We show that the resistivity can scale linearly with temperature down to temperatures much lower than the Bloch-Grüneisen scale defined by electron kinematics on the Fermi surface. This result stems from the friction between layers, which transfers phason spectral weight to a broad diffusive low-energy peak in the mechanical response of the system. As a result, phason scattering becomes a very efficient channel for entropy production at low temperatures. We also consider the contributions of phasons to thermodynamic properties at low temperatures and find a ''metallic-like'' linear-in-$T$ behavior for the specific heat, despite the fact that this behavior is due to mechanical and not electronic degrees of freedom. We discuss the implications of this finding to reports of linear-in-$T$ resistivity in the phase diagram of twisted bilayer graphene.
description: 12 pages, 5 figures; new calculations of the resistivity and the specific heat added
New Approach to Modeling Symbiosis in Biological and Social Systems
Creators: name: Yukalov, V. I.
name: Yukalova, E. P.
name: Sornette, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We suggest a novel approach to treating symbiotic relations between biological species or social entities. The main idea is the characterisation of symbiotic relations of coexisting species through their mutual influence on their respective carrying capacities, taking into account that this influence can be quite strong and requires a nonlinear functional framework. We distinguish three variants of mutual influence, representing the main types of relations between species: (i) passive symbiosis, when the mutual carrying capacities are influenced by other species without their direct interactions; (ii) active symbiosis, when the carrying capacities are transformed by interacting species; and (iii) mixed symbiosis, when the carrying capacity of one species is influenced by direct interactions, while that of the other species is not. The approach allows us to describe all kinds of symbiosis, mutualism, commensalism, and parasitism within a unified scheme. The case of two symbiotic species is analysed in detail, demonstrating several dynamical regimes of coexistence, unbounded growth of both populations, growth of one and elimination of the other population, convergence to evolutionary stable states, and everlasting population oscillations. The change of the dynamical regimes occurs by varying the system parameters characterising the destruction or creation of the mutual carrying capacities. The regime changes are associated with several dynamical system bifurcations.
description: Latex file, 38 pages, 20 figures
Upper-limb Geometric MyoPassivity Map for Physical Human-Robot Interaction
Creators: name: Zhou, Xingyuan
name: Paik, Peter
name: Atashzar, S. Farokh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The intrinsic biomechanical characteristic of the human upper limb plays a central role in absorbing the interactive energy during physical human-robot interaction (pHRI). We have recently shown that based on the concept of ``Excess of Passivity (EoP)," from nonlinear control theory, it is possible to decode such energetic behavior for both upper and lower limbs. The extracted knowledge can be used in the design of controllers for optimizing the transparency and fidelity of force fields in human-robot interaction and in haptic systems. In this paper, for the first time, we investigate the frequency behavior of the passivity map for the upper limb when the muscle co-activation was controlled in real-time through visual electromyographic feedback. Five healthy subjects (age: 27 +/- 5) were included in this study. The energetic behavior was evaluated at two stimulation frequencies at eight interaction directions over two controlled muscle co-activation levels. Electromyography (EMG) was captured using the Delsys Wireless Trigno system. Results showed a correlation between EMG and EoP, which was further altered by increasing the frequency. The proposed energetic behavior is named the Geometric MyoPassivity (GMP) map. The findings indicate that the GMP map has the potential to be used in real-time to quantify the absorbable energy, thus passivity margin of stability for upper limb interaction during pHRI.
Smooth Particle Mesh Ewald-integrated stochastic Lanczos Many-body Dispersion algorithm
Creators: name: Poier, Pier P.
name: Lagardère, Louis
name: Piquemal, Jean-Philip
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We derive and implement an alternative formulation of the Stochastic Lanczos algorithm to be employed in connection with the Many-Body Dispersion model (MBD). Indeed, this formulation, which is only possible due to the Stochastic Lanczos' reliance on matrix-vector products, introduces generalized dipoles and fields. These key quantities allow for a state-of-the-art treatment of periodic boundary conditions via the O(Nlog(N)) Smooth Particle Mesh Ewald (SPME) approach which uses efficient fast Fourier transforms. This SPME-Lanczos algorithm drastically outperforms the standard replica method which is affected by a slow and conditionally convergence rate that limits an efficient and reliable inclusion of long-range periodic boundary conditions interactions in many-body dispersion modelling. The proposed algorithm inherits the embarrassingly parallelism of the original Stochastic Lanczos scheme, thus opening up for a fully converged and efficient periodic boundary condition treatment of MBD approaches.
Experimental entanglement generation using multiport beam splitters
Creators: name: Kumar, Shreya
name: Bhatti, Daniel
name: Jones, Alex E.
name: Barz, Stefanie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multi-photon entanglement plays a central role in optical quantum technologies. One way to entangle two photons is to prepare them in orthogonal internal states, for example, in two polarisations, and then send them through a balanced beam splitter. Post-selecting on the cases where there is one photon in each output port results in a maximally entangled state. This idea can be extended to schemes for the post-selected generation of larger entangled states. Typically, switching between different types of entangled states require different arrangements of beam splitters and so a new experimental setup. Here, we demonstrate a simple and versatile scheme to generate different types of genuine tripartite entangled states with only one experimental setup. We send three photons through a three-port splitter and vary their internal states before post-selecting on certain output distributions. This results in the generation of tripartite W, G and GHZ states. We obtain fidelities of up to $(87.3 \pm 1.1)\%$ with regard to the respective ideal states, confirming a successful generation of genuine tripartite entanglement.
Supplementary document for 17-32 THz radiation generation from a CdSiP2 crystal - 6246362.pdf
Creators: name: Carnio, Brett
name: Zawilski, Kevin
name: Schunemann, Peter
name: Moutanabbir, Oussama
name: Elezzabi, Abdulhakem
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental
Fermionic Quantum Critical Point of Spinless Fermions on a Honeycomb Lattice
Creators: name: Wang, Lei
name: Corboz, Philippe
name: Troyer, Matthias
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Spinless fermions on a honeycomb lattice provide a minimal realization of lattice Dirac fermions. Repulsive interactions between nearest neighbors drive a quantum phase transition from a Dirac semimetal to a charge-density-wave state through a fermionic quantum critical point, where the coupling of Ising order parameter to the Dirac fermions at low energy drastically affects the quantum critical behavior. Encouraged by a recently discovery of absence of the fermion sign problem in this model, we study the fermionic quantum critical point using the continuous time quantum Monte Carlo method with worm sampling technique. We estimate the transition point $V/t= 1.356(1)$ with the critical exponents $ν=0.80(3)$ and $η=0.302(7)$. Compatible results for the transition point are also obtained with infinite projected entangled-pair states.
description: Single column, 21 pages, appendix on worm updates and \pi-flux lattice
Infinite series involving hyperbolic functions
Creators: name: Komori, Yasushi
name: Matsumoto, Kohji
name: Tsumura, Hirofumi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11M41, Secondary 11B68, 11F27, 11M32, 11M99

description: In the former part of this paper, we summarize our previous results on infinite series involving the hyperbolic sine function, especially, with a focus on the hyperbolic sine analogue of Eisenstein series. Those are based on the classical results given by Cauchy, Mellin and Kronecker. In the latter part, we give new formulas for some infinite series involving the hyperbolic cosine function.
description: 18 pages
Linear approximation to the statistical significance autocovariance matrix in the asymptotic regime
Creators: name: Ananiev, V.
name: Read, A. L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Approximating significance scans of searches for new particles in high-energy physics experiments as Gaussian fields is a well-established way to estimate the trials factors required to quantify global significances. We propose a novel, highly efficient method to estimate the covariance matrix of such a Gaussian field. The method is based on the linear approximation of statistical fluctuations of the signal amplitude. For one-dimensional searches the upper bound on the trials factor can then be calculated directly from the covariance matrix. For higher dimensions, the Gaussian process described by this covariance matrix may be sampled to calculate the trials factor directly. This method also serves as the theoretical basis for a recent study of the trials factor with an empirically constructed set of Asmiov-like background datasets. We illustrate the method with studies of a $H \rightarrow γγ$ inspired model that was used in the empirical paper.
description: 9 pages, 2 figures
Generating Greenberger-Horne-Zeilinger states using multiport splitters
Creators: name: Bhatti, Daniel
name: Barz, Stefanie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Symmetric multiport splitters are versatile tools in optical quantum information processing. They can be used for studying multiparticle scattering, studying distinguishability and mixedness, and also for the generation of multipartite entangled quantum states. Here, we show that N-photon N-mode Greenberger-Horne-Zeilinger (GHZ) states can be generated using symmetric multiport beam splitters. Varying the input states' internal degrees of freedom and post-selecting onto certain photon-number distributions allows the probabilistic generation of GHZ states with arbitrary photon numbers. We present two novel schemes, one for odd and one for even numbers of photons, to generate GHZ states using symmetric multiport splitters and compare them to a strategy utilizing a 2N-port network as well as the standard post-selection method.
Geothermal heating enhances atmospheric asymmetries on synchronously rotating planets
Creators: name: Haqq-Misra, Jacob
name: Kopparapu, Ravi Kumar
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Earth-like planets within the liquid water habitable zone of M type stars may evolve into synchronous rotators. On these planets, the sub-stellar hemisphere experiences perpetual daylight while the opposing anti-stellar hemisphere experiences perpetual darkness. Because the night-side hemisphere has no direct source of energy, the air over this side of the planet is prone to freeze out and deposit on the surface, which could result in atmospheric collapse. However, general circulation models (GCMs) have shown that atmospheric dynamics can counteract this problem and provide sufficient energy transport to the anti-stellar side. Here we use an idealized GCM to consider the impact of geothermal heating on the habitability of synchronously rotating planets. Geothermal heating may be expected due to tidal interactions with the host star, and the effects of geothermal heating provide additional habitable surface area and may help to induce melting of ice on the anti-stellar hemisphere. We also explore the persistence of atmospheric asymmetries between the northern and southern hemispheres, and we find that the direction of the meridional circulation (for rapidly rotating planets) or the direction of zonal wind (for slowly rotating planets) reverses on either side of the sub-stellar point. We show that the zonal circulation approaches a theoretical state similar to a Walker circulation only for slowly rotating planets, while rapidly rotating planets show a zonal circulation with the opposite direction. We find that a cross-polar circulation is present in all cases and provides an additional mechanism of mass and energy transport from the sub-stellar to anti-stellar point. Characterization of the atmospheres of synchronously rotating planets should include consideration of hemispheric differences in meridional circulation and examination of transport due to cross-polar flow.
description: Accepted for publication in MNRAS
An Exploratory Study on the Effects of Field Size and Field Boundary Pixels on Crop Spectral Signatures
Creators: name: Cardenas, Manuel
name: Hanuschak, George A.
name: Cardenas, Manuel
name: Hanuschak, George A.
Publisher: name: Unknown
Year: 1978
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: The LANDSAT data for the sample segments in a LANDSAT scene in each of California and Illinois was analyzed for the purpose of determining whether or not size of field and/or boundary pixels significantly influences the spectral signature of certain ground cover types. The data was divided into 4 field size classes: (1) less than 20 acres, (2) greater than or equal to 20 but less than 80 acres, (3) greater than or equal to 80, but less than 200 acres and (4) greater than or equal to 200 acres. The pixels for each field size class were combined and mean vectors and variance-covariance matrices were derived. Then concentration ellipses were plotted. Apparently the larger field sizes produce somewhat different signatures than the smaller ones. The smallest field size class (less than 20 acres) was subdivided into field size classes of (a) less than 10 acres and (b) greater than or equal to 10 acres, but less than 20 acres. The smaller field sizes tend to produce a more compact ellipse in California; not so in Illinois. These two smaller field size classes were also used to study the difference in signature, if any, produced by the inclusion and exclusion of boundary pixels. Not much difference was observed. Tables of descriptive statistics on the MSS bands by field size as well as concentration (90%) ellipses are presented.
description: Internal Working Paper/New Techniques Section
A c=1 phase transition in two-dimensional CDT/Horava-Lifshitz gravity?
Creators: name: Ambjørn, Jan
name: Görlich, Andrzej
name: Jurkiewicz, Jerzy
name: Zhang, Hongguang
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study matter with central charge $c >1$ coupled to two-dimensional (2d) quantum gravity, here represented as causal dynamical triangulations (CDT). 2d CDT is known to provide a regularization of (Euclidean) 2d Hořava-Lifshitz quantum gravity. The matter fields are massive Gaussian fields, where the mass is used to monitor the central charge $c$. Decreasing the mass we observe a higher order phase transition between an effective $c=0$ theory and a theory where $c>1$. In this sense the situation is somewhat similar to that observed for "standard" dynamical triangulations (DT) which provide a regularization of 2d quantum Liouville gravity. However, the geometric phase observed for $c >1$ in CDT is very different from the corresponding phase observed for DT.
description: 16 pages, 10 figures
UN VALIDO E INNOVATIVO AIUTO PER LA MEDICINA E LA RICERCA: Le proteine ricombinanti
Creators: name: Adinolfi, Salvatore
name: Oliaro-Bosso, Simonetta
Publisher: name: Zenodo
Year: 2022
Subjects: proteine ricombinanti

description: Ci chiamano PROTEINE RICOMBINANTI. Siamo tante, tutte lì nei frigoriferi di farmacie e di ospedali. Sui nostri boccettini c’è scritto insulina, ormone della crescita, proteina della coagulazione, vaccino proteico anti-Covid, etc.
 PERCHÉ SIAMO LÌ?
 Le nostre gemelle, le proteine presenti in tutte le cellule viventi, sono delle grandi lavoratrici, formate tutte da aminoacidi ma ognuna con una sequenza specifica che le rende uniche. Questa unicità fa sì che ognuna di esse abbia un lavoro ben preciso ed
 insieme collaborino per far funzionare tutte le cellule viventi. A volte, però, qualcosa si inceppa. Improvvisamente può succedere che l’organismo non riesca più a produrle oppure le produca malfunzionanti. Chi svolgerà così il loro lavoro? Ed ecco che le persone
 si ammalano e sviluppano malattie gravi: il diabete, ad esempio, nei bambini e negli adulti che non producono la proteina insulina, e che, quindi, non riescono ad utilizzare gli zuccheri per avere energia. Oppure l’emofilia, nelle persone in cui le proteine per la
 coagulazione del sangue non sono complete; non si forma la crosticina, le ferite non smettono di sanguinare e si hanno emorragie.
 Ecco, allora, la risposta! Noi, proteine ricombinanti, possiamo aiutare le nostre proteine gemelle! Possiamo aiutare le persone malate!
Ultrastrong Magnon-Photon Coupling Achieved by Magnetic Films in Contact with Superconducting Resonators
Creators: name: Ghirri, Alberto
name: Bonizzoni, Claudio
name: Maksutoglu, Maksut
name: Mercurio, Alberto
name: Di Stefano, Omar
name: Savasta, Salvatore
name: Affronte, Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Coherent coupling between spin wave excitations (magnons) and microwave photons in a cavity may disclose new paths to unconventional phenomena as well as for novel applications. Here, we present a systematic investigation on YIG (Yttrium Iron Garnet) films on top of coplanar waveguide resonators made of superconducting YBCO. We first show that spin wave excitations with frequency higher than the Kittel mode can be excited by putting in direct contact a 5~$μ$m thick YIG film with the YBCO coplanar resonator (cavity frequency $ω_c/2 π= 8.65$~GHz). With this configuration, we obtain very large values of the collective coupling strength $λ/2 π\approx 2$~GHz and cooperativity $C=5 \times 10^4$. Transmission spectra are analyzed by a modified Hopfield model for which we provide an exact solution that allows us to well reproduce spectra by introducing a limited number of free parameters. It turns out that the coupling of the dominant magnon mode with photons exceeds 0.2 times the cavity frequency, thus demonstrating the achievement of the ultrastrong coupling regime with this architecture. Our analysis also shows a vanishing contribution of the diamagnetic term which is a peculiarity of pure spin systems.
The linear tearing instability in three dimensional, toroidal gyrokinetic simulations
Creators: name: Hornsby, William
name: Migliano, Pierluigi
name: Bucholz, Rico
name: Kroenert, Lukas
name: Peeters, Arthur
name: Zarzoso, David
name: Poli, Emanuele
name: Casson, Francis
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Linear gyro-kinetic simulations of the classical tearing mode in three-dimensional toroidal geometry were performed using the global gyro kinetic turbulence code, GKW . The results were benchmarked against a cylindrical ideal MHD and analytical theory calculations. The stability, growth rate and frequency of the mode were investigated by varying the current profile, collisionality and the pressure gradients. Both collision-less and semi-collisional tearing modes were found with a smooth transition between the two. A residual, finite, rotation frequency of the mode even in the absense of a pressure gradient is observed which is attributed to toroidal finite Larmor-radius effects. When a pressure gradient is present at low collisionality, the mode rotates at the expected electron diamagnetic frequency. However the island rotation reverses direction at high collisionality. The growth rate is found to follow a $η^{1/7}$ scaling with collisional resistivity in the semi-collisional regime, closely following the semi-collisional scaling found by Fitzpatrick. The stability of the mode closely follows the stability using resistive MHD theory, however a modification due to toroidal coupling and pressure effects is seen.