cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
BFKL pomeron with massive gluons and running coupling
Creators: name: Levin, Eugene
name: Lipatov, Lev
name: Siddikov, Marat
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we proceed with the study of the Pomeron spectrum, by solving numerically the BFKL equation with massive gluons and running coupling. The spectrum of Regge singularities is discrete and the leading Pomeron has a considerable dependence on nonperturbative effects, for which we use Higgs mechanism as a model. We cross-checked this result with variational method and confirmed the infrared sensitivity of leading Pomeron. This fact is related to the infrared instability of the BFKL equation in QCD, with a running coupling. The subleading poles have a mild sensitivity to the soft physics, and are well described by known semiclassical methods. We also discuss the dependence on various prescriptions of the running coupling arguments.
description: 21 pages, 11 Figures
Observation of Non-Hermitian Skin Effect and Topology in Ultracold Atoms
Creators: name: Liang, Qian
name: Xie, Dizhou
name: Dong, Zhaoli
name: Li, Haowei
name: Li, Hang
name: Gadway, Bryce
name: Yi, Wei
name: Yan, Bo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The non-Hermitian skin effect (NHSE), the accumulation of eigen wavefunctions at boundaries of open systems, underlies a variety of exotic properties that defy conventional wisdom. While NHSE and its intriguing impact on band topology and dynamics have been observed in classical or photonic systems, their demonstration in a quantum many-body setting remains elusive. Here we report the experimental realization of a dissipative Aharonov-Bohm chain -- a non-Hermitian topological model with NHSE -- in the momentum space of a two-component Bose-Einstein condensate. We identify unique signatures of NHSE in the condensate dynamics, and perform Bragg spectroscopy to resolve topological edge states against a background of localized bulk states. Our work sets the stage for further investigation on the interplay of many-body statistics and interactions with NHSE, and is a significant step forward in the quantum control and simulation of non-Hermitian physics.
description: 13 pages, 11 figures
Artibeus anderseni Osgood 1916
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus anderseni

description: Artibeus anderseni Osgood, 1916. Field Mus. Nat. Hist. Publ. Ser. Zool., 10: 212. TYPE LOCALITY: Brazil, Rondonia, Porto Velho. DISTRIBUTION: W. Brazil; Bolivia; Ecuador; Peru; French Guiana. COMMENT: Previously considered a subspecies of cinereus; but see Koopman, 1978:14.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 151, DOI: 10.5281/zenodo.7352990
Topological Phase Transitions and a Two-Dimensional Weyl Superconductor in a Half-Metal/Superconductor Heterostructure
Creators: name: Hao, Lei
name: Ting, C. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We find a series of topological phase transitions in a half-metal/superconductor heterostructure, by tuning the direction of the magnetization of the half-metal film. These include transitions between a topological superconducting phase with a bulk gap and another phase without a bulk gap but has a ubiquitous local gap. At the same time, the edge states change from counter-propagating Majorana edge modes to unidirectional Majorana edge modes. In addition, we find transitions between the second phase and a nodal phase which turns out to be a two-dimensional Weyl superconductor with Fermi line edge states. We identify the topological invariants relevant to each phase and the symmetry that protects the Weyl superconductivity phase.
description: 12 pages, 6 figures
Ultrasonic Inspection of Bolts using an Integrated Probe Attachment
Creators: name: Bin Rosli, Abdul Akif
name: Liew, Chin Kian
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Engineering design
Mechanical engineering not elsewhere classified

description: Anchor bolt inspection for an overhead catenary system (OCS) in an underground tunnel has been a significant operational challenge. The existing method of visual testing gives an inadequate measure of the bolt’s integrity as the embedded section of the bolt cannot be inspected. Ultrasonic testing provides a more effective approach to inspect the entire bolt volume but there are difficulties in performing this manual inspection in the tunnel at an overhead position, at height and with inadequate lighting. With these challenging operating conditions, one major problem encountered is the inconsistency in the ultrasound signals acquired due to the inability to maintain good surface contact and sufficient pressure between the probe and the bolt. This paper proposes a novel design of an integrated ultrasound probe that is permanently attached to the anchor bolt and only requires the operator to connect the cable to the probe to function. Several inspection runs have been conducted to study the consistency of the ultrasonic testing results over a period of time for bolt specimens integrated with this probe attachment. Cuts of various depths were also fabricated to simulate defects on these specimens and it was found that repeatable results could be observed in detecting and quantifying these defects.
Multiscale machine-learning interatomic potentials for ferromagnetic and liquid iron
Creators: name: Byggmästar, Jesper
name: Nikoulis, Giorgos
name: Fellman, Aslak
name: Granberg, Fredric
name: Djurabekova, Flyura
name: Nordlund, Kai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We develop and compare four interatomic potentials for iron: a simple machine-learned embedded atom method (EAM) potential, a potential with machine-learned two- and three-body-dependent terms, a potential with machine-learned EAM and three-body terms, and a Gaussian approximation potential with the SOAP descriptor. All potentials are trained to the same diverse database of body-centered cubic and liquid structures computed with density functional theory. The four presented potentials represent different levels of complexity and span three orders of magnitude in computational cost. The first three potentials are tabulated and evaluated efficiently using cubic spline interpolations, while the fourth one is implemented without additional optimization. We compare and discuss the advantages of each implementation, transferability and applicability in terms of the balance between required accuracy versus computational cost.
Representation of the Fermionic Boundary Operator
Creators: name: Akhalwaya, Ismail Yunus
name: He, Yang-Hui
name: Horesh, Lior
name: Jejjala, Vishnu
name: Kirby, William
name: Naidoo, Kugendran
name: Ubaru, Shashanka
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Numerical Analysis (math.NA)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The boundary operator is a linear operator that acts on a collection of high-dimensional binary points (simplices) and maps them to their boundaries. This boundary map is one of the key components in numerous applications, including differential equations, machine learning, computational geometry, machine vision and control systems. We consider the problem of representing the full boundary operator on a quantum computer. We first prove that the boundary operator has a special structure in the form of a complete sum of fermionic creation and annihilation operators. We then use the fact that these operators pairwise anticommute to produce an $O(n)$-depth circuit that exactly implements the boundary operator without any Trotterization or Taylor series approximation errors. Having fewer errors reduces the number of shots required to obtain desired accuracies.
description: 16 pages
How does increasing atmospheric carbon dioxide disrupt ecological systems? Results from FACE experiments across the globe.
Creators: name: Campany, Courtney
Publisher: name: QUBES Educational Resources
Year: 2020

description: This module synthesizes key findings from forested CO2 enrichment experiments over the last 3 decades. Students should have a basic working knowledge of climate change, ecosystem nutrient cycles and plant-fungal relationships to complete the assignment.
Algebraic properties of Levi graphs associated with curve arrangements
Creators: name: Pokora, Piotr
name: Römer, Tim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E40, 13F55 (Primary), 05C25, 13H10, 14N20 (Secondary)

description: In the present paper we study algebraic properties of edge ideals associated with plane curve arrangements via their Levi graphs. Using combinatorial properties of such Levi graphs we are able to describe those monomial algebras being Cohen-Macaulay, Buchsbaum, and sequentially Cohen-Macaulay. We also condsider the projective dimension and the Castelnuovo-Mumford regularity for these edge ideals. We provide effective lower and upper bounds on them. As a byproduct of our study we connect, in general, various Buchsbaum properties of squarefree modules.
description: 20 pages. This is the final version incorporating the referee's remarks, to appear in Research in the Mathematical Sciences
A Transfer Learning and Optimized CNN Based Intrusion Detection System for Internet of Vehicles
Creators: name: Yang, Li
name: Shami, Abdallah
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: I.2.6; C.2.0
subject: 68T01

description: Modern vehicles, including autonomous vehicles and connected vehicles, are increasingly connected to the external world, which enables various functionalities and services. However, the improving connectivity also increases the attack surfaces of the Internet of Vehicles (IoV), causing its vulnerabilities to cyber-threats. Due to the lack of authentication and encryption procedures in vehicular networks, Intrusion Detection Systems (IDSs) are essential approaches to protect modern vehicle systems from network attacks. In this paper, a transfer learning and ensemble learning-based IDS is proposed for IoV systems using convolutional neural networks (CNNs) and hyper-parameter optimization techniques. In the experiments, the proposed IDS has demonstrated over 99.25% detection rates and F1-scores on two well-known public benchmark IoV security datasets: the Car-Hacking dataset and the CICIDS2017 dataset. This shows the effectiveness of the proposed IDS for cyber-attack detection in both intra-vehicle and external vehicular networks.
description: Accepted and to appear in IEEE International Conference on Communications (ICC); Code is available at Github link: https://github.com/Western-OC2-Lab/Intrusion-Detection-System-Using-CNN-and-Transfer-Learning
Artibeus aztecus K. Andersen 1906
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus aztecus

description: Artibeus aztecus K. Andersen, 1906. Ann. Mag. Nat. Hist., ser. 7, 18:422. TYPE LOCALITY: Mexico, Morelos, Tetela del Volcan. DISTRIBUTION: W. Panama; Costa Rica; Honduras, El Salvador, Guatemala; and Chiapas; Guerrero, to S. Nuevo Leon and C. Sinaloa (Mexico). COMMENT: Not a subspecies of cinereus; see Jones and Carter, 1976:27. Revised by Davis, 1969, Southwest. Nat., 14:15-29. ISIS NUMBER: 5301405008026001001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 151, DOI: 10.5281/zenodo.7352990
description: {"references": ["Jones, J. K., Jr., and D. C. Carter. 1976. Annotated checklist, with keys to subfamilies and genera. Part I. Pp. 7 - 38, in Biology of bats of the New World family Phyllostomatidae. Part I (R. J. Baker, J. K. Jones, Jr., and D. C. Carter, eds.). Special Publications, The Museum, Texas Tech University Press, 10: 1 - 218.", "Davis, W. B. 1969. A review of the small fruit bats (genus Artibeus) of Middle America. Southwestern Naturalist, 14: 15 - 29."]}
Super-convergence and post-processing for mixed finite element approximations of the wave equation
Creators: name: Egger, Herbert
name: Radu, Bogdan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the numerical approximation of acoustic wave propagation problems by mixed BDM(k+1)-P(k) finite elements on unstructured meshes. Optimal convergence of the discrete velocity and super-convergence of the pressure by one order are established. Based on these results, we propose a post-processing strategy that allows us to construct an improved pressure approximation from the numerical solution. Corresponding results are well-known for mixed finite element approximations of elliptic problems and we extend these analyses here to the hyperbolic problem under consideration. We also consider the subsequent time discretization by the Crank-Nicolson method and show that the analysis and the post-processing strategy can be generalized to the fully discrete schemes. Our proofs do not rely on duality arguments or inverse inequalities and the results therefore apply also for non-convex domains and non-uniform meshes.
Bipolar Anodization Enables the Fabrication of Controlled Arrays of TiO2 Nanotube Gradients
Creators: name: Loget, G.
name: So, S.
name: Hahn, R.
name: Schmuki, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report here a new concept, the use of bipolar electrochemistry, which allows the rapid and wireless growth of self-assembled TiO2 NT layers that consist of highly defined and controllable gradients in NT length and diameter. The gradient height and slope can be easily tailored with the time of electrolysis and the applied electric field, respectively. As this technique allows obtaining in one run a wide range of self-ordered TiO2 NT dimensions, it provides the basis for rapid screening of TiO2 NT properties. In two examples, we show how these gradient arrays can be used to screen for an optimized photocurrent response from TiO2 NT based devices such as dye-sensitized solar cells.
GTnum PERSEUS #InteractionHybridation - Conception d'IHM pour l'éducation
Creators: name: Bertolo, David
name: Voillot, Marion
name: Fleck, Stéphanie
name: Kubicki, Sébastien
Publisher: name: Zenodo
Year: 2023
Subjects: Hybridation physique-numérique
Interaction Humain-Machine
Conception
Education
DNE
#GTnum
Interaction

description: Bulletin de veille qui présente les grands principes de conception suivis dans le domaine des IHM (Interface Humain-Machine).
description: Les groupes thématiques numériques (GTnum) sont coordonnés par la Direction du numérique pour l'éducation du Ministère de l'Education nationale et de la Jeunesse. Les GTnum ont pour objectif de mettre à disposition des équipes éducatives, de façon accessible et ouverte, un état de la recherche sur quelques grandes thématiques relatives au numérique dans l'éducation. Financeur du projet:« Ministère de l'Éducation nationale et de la Jeunesse»
A deep machine learning potential for atomistic simulation of Fe-Si-O systems under Earth's outer core conditions
Creators: name: Zhang, Chao
name: Tang, Ling
name: Sun, Yang
name: Ho, Kai-Ming
name: Wentzcovitch, Renata M.
name: Wang, Cai-Zhuang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using artificial neural-network machine learning (ANN-ML) to generate interatomic potentials has been demonstrated to be a promising approach to address the long-standing challenge of accuracy versus efficiency in molecular dynamics (MD) simulations. Here, taking the Fe-Si-O system as a prototype, we show that accurate and transferable ANN-ML potentials can be developed for reliable MD simulations of materials at high-pressure and high-temperature conditions of the Earth's outer core. The ANN-ML potential for Fe-Si-O system is trained by fitting to the energies and forces of related binaries and ternary liquid structures at high pressures and temperatures obtained by first-principles calculations based on density functional theory (DFT). We show that the generated ANN-ML potential describes well the structure and dynamics of liquid phases of this complex system. The efficient ANN-ML potential with DFT accuracy provides a promising scheme for accurate atomistic simulations of structures and dynamics of complex Fe-Si-O system in the Earth's outer core.
Dermal, histological anomalies with variations in enzyme activities of the earthworms Lampito mauritii and Drawida willsi after short term exposure to organophosphate pesticides
Creators: name: Samal, S
name: Mishra, C S K
name: Sahoo, S
Publisher: name: Invertebrate Survival Journal
Year: 2020

description: Monocrotophos and glyphosate are two potent organophosphate pesticides used on agricultural farms in India to control insect pests and weeds, respectively. Consistent application of these chemicals poses a risk of residual soil contamination with possible adverse implications on non-target organisms, like earthworms. The present study evaluates the impacts of these pesticides on the skin, muscles and certain biochemical parameters such as protein content, lipid peroxidation (LPX) level, activities of lactate dehydrogenase (LDH), acetylcholinesterase (AChE) and catalase (CAT) of two tropical earthworms Drawida willsi and Lampito mauritii. Monocrotophos at 1.0, 2.0, 3.0 g/kg soil and glyphosate at 0.1, 0.15, 0.2 g/kg soil were used for the experiment. At high concentrations, both pesticides induced lesions and skin undulation in the earthworms. In L. mauritii, the postclitellar region indicated muscle disorganization with high concentrations of monocrotophos. The lowest protein level was recorded in D.willsi and L. mauritii with high concentrations of monocrotophos. L. mauritii exhibited maximum LPX at high concentrations of glyphosate. Both the earthworms indicated the least LDH activity with high pesticide concentration. Minimal AChE activity in L. mauritii was observed with a high concentration of glyphosate. A high concentration of monocrotophos inhibited CAT activity in L. mauritii. The variable response of the selected morpho-histological and biochemical parameters in the earthworms to different pesticide concentrations could be useful early warning biomarkers to evaluate soil residual toxicity.
description: Invertebrate Survival Journal, Vol 17 No 1 (2020)
Observational Confirmation of a Link Between Common Envelope Binary Interaction and Planetary Nebula Shaping
Creators: name: Hillwig, Todd
name: Jones, David
name: De Marco, Orsola
name: Bond, Howard
name: Margheim, Steve
name: Frew, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A current issue in the study of planetary nebulae with close binary central stars is the extent to which the binaries affect the shaping of the nebulae. Recent studies have begun to show a high coincidence rate between nebulae with large-scale axial or point symmetries and close binary stars. In addition, combined binary-star and spatio-kinematic modeling of the nebulae have demonstrated that all of the systems studied to date appear to have their central binary axis aligned with the primary axis of the nebula. Here we add two more systems to the list, the central stars and nebulae of NGC 6337 and Sp 1. We show both systems to be low inclination, with their binary axis nearly aligned with our line-of-sight. Their inclinations match published values for the inclinations of their surrounding nebulae. Including these two systems with the existing sample statistically demonstrates a direct link between the central binary and the nebular morphology. In addition to the systems' inclinations we give ranges for other orbital parameters from binary modeling, including updated orbital periods for the binary central stars of NGC 6337 and Sp 1.
description: Accepted for publication in the Astrophysical Journal. In the previously uploaded version of this paper, Figure 7 was displayed rotated 180 degrees. That and minor additional editorial items have been corrected
Universal tetramer and pentamer in two-dimensional fermionic mixtures
Creators: name: Liu, Ruijin
name: Peng, Cheng
name: Cui, Xiaoling
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the emergence of universal tetramer and pentamer bound states in the two-dimensional $(N+1)$ system, which consists of $N$ identical heavy fermions interacting with a light atom. We show that the critical heavy-light mass ratio to support a ($3+1$) tetramer below the trimer threshold is $3.38$, and to support a ($4+1$) pentamer below the tetramer threshold is $5.14$. While these ground state tetramer and pentamer are both with zero total angular momentum, they exhibit very different density distributions and correlations in momentum space, due to their distinct angular momentum decompositions in the dimer-fermion frame. These universal bound states can be accessible by a number of Fermi-Fermi mixtures now realized in cold atoms laboratories, which also suggest novel few-body correlations dominant in their corresponding many-body systems.
description: 6 pages, 3 figures; version to appear in PRL
Artibeus cinereus
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus cinereus

description: Artibeus cinereus (Gervais, 1856). Exped. Castelnau Zool., p. 36. TYPE LOCALITY: Brazil, Para, Belem. DISTRIBUTION: Veracruz (Mexico) to Guianas, N. E. Brazil, Bolivia, and Amazonian Peru; Trinidad; Tobago; Grenada. COMMENT: Includes quadrivittatus and rosenbergi; see Cabrera, 1958:87-88. Includes glaucus, watsoni and bogotensis; see Jones and Carter, 1979:8, and Jones and Carter, 1976:26. Includes pumilio; see Koopman, 1978:13- 14. ISIS NUMBER: 5301405008026002001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 151, DOI: 10.5281/zenodo.7352990
description: {"references": ["Cabrera, A. 1958. Dos felidos argentinos ineditos (Mammalia, Carnivora). Neotropica, 3 (12): 70 - 72.", "Jones, J. K., Jr., and D. C. Carter. 1979. Systematic and distributional notes. Pp. 7 - 11, in Biology of bats of the New World family Phyllostomatidae, Part III. (R. J. Baker, J. K. Jones, Jr., and D. C. Carter, eds.). Special Publications, The Museum, Texas Tech University Press, 16: 1 - 441.", "Jones, J. K., Jr., and D. C. Carter. 1976. Annotated checklist, with keys to subfamilies and genera. Part I. Pp. 7 - 38, in Biology of bats of the New World family Phyllostomatidae. Part I (R. J. Baker, J. K. Jones, Jr., and D. C. Carter, eds.). Special Publications, The Museum, Texas Tech University Press, 10: 1 - 218."]}
A Smörgåsbord of Skyrmions
Creators: name: Gudnason, Sven Bjarke
name: Halcrow, Chris
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study static solutions of the standard Skyrme model with a pion mass. Using approximately $10^5$ pseudo-random initial configurations made of single Skyrmions in the non-symmetrized product Ansatz and an automatic detection of repeated solutions, we find 409 local energy minimizers (Skyrmions) of the model with baryon numbers 1 through 16, of which 383 are new. In particular, we find new solutions for baryon numbers 5, 8, 9, 10, 11, 12, 13, 14, 15, and 16. Our results for the number of solutions per baryon number suggest that this number could grow either polynomially or exponentially. We identify new families of solutions: sheets of Skyrmions in synchronized and antisynchronized hexagonal layers (which we call graphene); chains of 2- and 3-tori; chain-like solutions containing a hinge and many clustered Skyrmions. Contrary to common lore, only the $B=12$ global energy minimizer is made of alpha particles or some chunk of a cubic crystal, whereas the $B=9,11,14,15$ minimizers contain the $B=7$ icosahedrally symmetric Skyrmion as a component. The $B=10,13,16$ are symmetric graphene-like solutions. We find $B=5$ and $B=8$ minimizers with numerically indistinguishable energies. The $B=8$ candidates are the chain of two cubes, which is a chunk of the cubic Skyrme crystal and the fullerene-type ball found originally by the rational map approximation. The $B=5$ global minimizer is either the well-known $D_{2d}$ symmetric fullerene or a new $C_{2v}$ symmetric solution. Finally, our findings show a large number of solutions have no discrete symmetries or just one symmetry, contrary to the common lore that Skyrmions are highly symmetric configurations.
description: LaTeX: 28 + 77 pages, 16 figures and 16 tables, animations of all solutions rotating at http://bjarke.gudnason.net/smoergaasbord; V2: comments added, reference added and typos corrected
Detection of an oxygen emission line from a high redshift galaxy in the reionization epoch
Creators: name: Inoue, Akio K.
name: Tamura, Yoichi
name: Matsuo, Hiroshi
name: Mawatari, Ken
name: Shimizu, Ikkoh
name: Shibuya, Takatoshi
name: Ota, Kazuaki
name: Yoshida, Naoki
name: Zackrisson, Erik
name: Kashikawa, Nobunari
name: Kohno, Kotaro
name: Umehata, Hideki
name: Hatsukade, Bunyo
name: Iye, Masanori
name: Matsuda, Yuichi
name: Okamoto, Takashi
name: Yamaguchi, Yuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The physical properties and elemental abundances of the interstellar medium in galaxies during cosmic reionization are important for understanding the role of galaxies in this process. We report the Atacama Large Millimeter/submillimeter Array detection of an oxygen emission line at a wavelength of 88 micrometers from a galaxy at an epoch about 700 million years after the Big Bang. The oxygen abundance of this galaxy is estimated at about one-tenth that of the Sun. The non-detection of far-infrared continuum emission indicates a deficiency of interstellar dust in the galaxy. A carbon emission line at a wavelength of 158 micrometers is also not detected, implying an unusually small amount of neutral gas. These properties might allow ionizing photons to escape into the intergalactic medium.
description: First Release on June 16, 2016 in Science
Emergence of Crystalline Few-body Correlations in Mass-imbalanced Fermi Polarons
Creators: name: Liu, Ruijin
name: Peng, Cheng
name: Cui, Xiaoling
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Polarons can serve as an ideal platform to identify few-body correlations in tackling complex many-body problems. In this work, we reveal various crystalline few-body correlations smoothly emergent from the mass-imbalanced Fermi polarons in two dimensions. A unified variational approach up to three particle-hole excitations allows us to extract the dominant dimer, trimer or tetramer correlation in a single framework. When the fermion-impurity mass ratio is beyond certain critical value, the Fermi polaron is found to undergo a smooth crossover, instead of a sharp transition, from the polaronic to trimer and tetramer regimes as increasing the fermion-impurity attraction. The emergent trimer and tetramer correlations result in the momentum-space crystallization of particle-hole excitations featuring a stable diagonal or triangular structure, as can be directly probed through the density-density correlation of majority fermions. Our results shed light on the intriguing quantum phases in the mass-imbalanced Fermi-Fermi mixtures beyond the pairing superfluid paradigm.
description: 11+5 pages, 5+4 figures; to appear in Cell Reports Physical Science
Vortex structure in superfluid color-flavor locked quark matter
Creators: name: Alford, Mark G.
name: Mallavarapu, S. Kumar
name: Vachaspati, Tanmay
name: Windisch, Andreas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The core region of a neutron star may feature quark matter in the color-flavor- locked (CFL) phase. The CFL condensate breaks the baryon number symmetry, such that the phenomenon of superfluidity arises. If the core of the star is rotating, vortices will form in the superfluid, carrying the quanta of angular momentum. In a previous study we have solved the question of stability of these vortices, where we found numerical proof of a conjectured instability, according to which superfluid vortices will decay into an arrangement of so-called semi-superfluid fluxtubes. Here we report first results of an extension of our framework that allows us to study multi-vortex dynamics. This will in turn enable us to investigate the structure of semi-superfluid string lattices, which could be relevant to study pinning phenomena at the boundary of the core.
description: Conference proceedings 'QCD@Work 2016'
Artibeus concolor Peters 1865
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus concolor

description: Artibeus concolor Peters, 1865. Monatsb. Preuss. Akad. Wiss. Berlin, p. 357. TYPE LOCALITY: Surinam, Paramaribo. DISTRIBUTION: Guianas; Venezuela; Colombia; N. Brazil; Peru.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 151, DOI: 10.5281/zenodo.7352990
Enhanced valley splitting in monolayer WSe2 due to magnetic exchange field
Creators: name: Zhao, Chuan
name: Norden, Tenzin
name: Zhao, Puqin
name: Cheng, Yingchun
name: Zhang, Peiyao
name: Sun, Fan
name: Taheri, Payam
name: Wang, Jieqiong
name: Yang, Yihang
name: Scrace, Thomas
name: Kang, Kaifei
name: Yang, Sen
name: Miao, Guo-xing
name: Sabirianov, Renat
name: Kioseoglou, George
name: Petrou, Athos
name: Zeng, Hao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Exploiting the valley degree of freedom to store and manipulate information provides a novel paradigm for future electronics. A monolayer transition metal dichalcogenide (TMDC) with broken inversion symmetry possesses two degenerate yet inequivalent valleys, offering unique opportunities for valley control through helicity of light. Lifting the valley degeneracy by Zeeman splitting has been demonstrated recently, which may enable valley control by a magnetic field. However, the realized valley splitting is modest, (~ 0.2 meV/T). Here we show greatly enhanced valley spitting in monolayer WSe2, utilizing the interfacial magnetic exchange field (MEF) from a ferromagnetic EuS substrate. A valley splitting of 2.5 meV is demonstrated at 1 T by magneto-reflectance measurements. Moreover, the splitting follows the magnetization of EuS, a hallmark of the MEF. Utilizing MEF of a magnetic insulator can induce magnetic order, and valley and spin polarization in TMDCs, which may enable valleytronic and quantum computing applications.
A molecular dynamics approach to dissipative relativistic hydrodynamics: propagation of fluctuations
Creators: name: Shahsavar, Leila
name: Ghodrat, Malihe
name: Montakhab, Afshin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Relativistic generalization of hydrodynamic theory has attracted much attention from a theoretical point of view. However, it has many important practical applications in high energy as well as astrophysical contexts. Despite various attempts to formulate relativistic hydrodynamics, no definitive consensus has been achieved. In this work, we propose to test the predictions of four types of \emph{first-order} hydrodynamic theories for non-perfect fluids in the light of numerically exact molecular dynamics simulations of a fully relativistic particle system in the low density regime. In this regard, we study the propagation of density, velocity and heat fluctuations in a wide range of temperatures using extensive simulations and compare them to the corresponding analytic expressions we obtain for each of the proposed theories. As expected in the low temperature classical regime all theories give the same results consistent with the numerics. In the high temperature extremely relativistic regime, not all considered theories are distinguishable from one another. However, in the intermediate regime, a meaningful distinction exists in the predictions of various theories considered here. We find that the predictions of the recent formulation due to Tsumura-Kunihiro-Ohnishi are more consistent with our numerical results than the traditional theories due to Meixner, modified Eckart and modified Marle-Stewart.
description: 11 pages, 5 figures, to appear in PRC
Artibeus fraterculus Anthony 1924
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus fraterculus

description: Artibeus fraterculus Anthony, 1924. Am. Mus. Novit., 114:5. TYPE LOCALITY: Ecuador, El Oro, Portovelo, 2000 ft. (610 m). DISTRIBUTION: Ecuador; Peru. COMMENT: Considered a subspecies of jamaicensis by Jones and Carter, 1976:2; but see Koopman, 1978:14.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 151, DOI: 10.5281/zenodo.7352990
description: {"references": ["Jones, J. K., Jr., and D. C. Carter. 1976. Annotated checklist, with keys to subfamilies and genera. Part I. Pp. 7 - 38, in Biology of bats of the New World family Phyllostomatidae. Part I (R. J. Baker, J. K. Jones, Jr., and D. C. Carter, eds.). Special Publications, The Museum, Texas Tech University Press, 10: 1 - 218."]}
GIGA-Lens: Fast Bayesian Inference for Strong Gravitational Lens Modeling
Creators: name: Gu, A.
name: Huang, X.
name: Sheu, W.
name: Aldering, G.
name: Bolton, A. S.
name: Boone, K.
name: Dey, A.
name: Filipp, A.
name: Jullo, E.
name: Perlmutter, S.
name: Rubin, D.
name: Schlafly, E. F.
name: Schlegel, D. J.
name: Shu, Y.
name: Suyu, S. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present GIGA-Lens: a gradient-informed, GPU-accelerated Bayesian framework for modeling strong gravitational lensing systems, implemented in TensorFlow and JAX. The three components, optimization using multi-start gradient descent, posterior covariance estimation with variational inference, and sampling via Hamiltonian Monte Carlo, all take advantage of gradient information through automatic differentiation and massive parallelization on graphics processing units (GPUs). We test our pipeline on a large set of simulated systems and demonstrate in detail its high level of performance. The average time to model a single system on four Nvidia A100 GPUs is 105 seconds. The robustness, speed, and scalability offered by this framework make it possible to model the large number of strong lenses found in current surveys and present a very promising prospect for the modeling of $\mathcal{O}(10^5)$ lensing systems expected to be discovered in the era of the Vera C. Rubin Observatory, Euclid, and the Nancy Grace Roman Space Telescope.
description: 23 pages, 13 figures, 2 tables. Submitted to ApJ
Gravitational redshift and asymmetric redshift-space distortions for stacked clusters
Creators: name: Cai, Yan-Chuan
name: Kaiser, Nick
name: Cole, Shaun
name: Frenk, Carlos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We derive the expression for the observed redshift in the weak field limit in the observer's past light cone, including all relativistic terms up to second order in velocity. We then apply it to compute the cluster-galaxy cross-correlation functions (CGCF) using N-body simulations. The CGCF is asymmetric along the line of sight (LOS) owing to the presence of the small second order terms such as the gravitational redshift (GRedshift). We identify two systematics in the modelling of the GRedshift signal in stacked clusters. First, it is affected by the morphology of dark matter haloes and the large-scale cosmic-web. The non-spherical distribution of galaxies around the central halo and the presence of neighbouring clusters systematically reduce the GRedshift signal. This bias is approximately 20% for $M_{\rm min}\simeq 10^{14} {\rm M_{\odot}}/h$, and is more than 50% for haloes with $M_{\rm min}\simeq 2\times 10^{13} {\rm M_{\odot}}/h$ at $r>$4 Mpc/$h$. Second, the best-fit gravitational redshift profiles as well as the profiles of all other relativistic terms are found to be significantly different in velocity space compared to their real space versions. We discuss some subtleties relating to these effects in velocity space. We also find that the S/N of the GRedshift signal increases with decreasing halo mass.
description: 13 pages, 6 figures, submitted to MNRAS
Mass estimates for very cold (< 8 K) gas in molecular cloud cores
Creators: name: Steinacker, Juergen
name: Linz, Hendrik
name: Beuther, Henrik
name: Henning, Thomas
name: Bacmann, Aurore
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The mass of prestellar cores is an essential ingredient to understand the onset of star formation in the core. The low level of emission from cold dust may keep parts of it hidden from observation. We aim to determine the fraction of core mass in the temperature range < 8 K that can be expected for typical low- and high-mass star formation regions. We calculate the dust temperature within standard spherically symmetric prestellar cores for a grid of density powerlaws in the outer core regions, core masses, and variation in the external multi-component radiation field. The dust is assumed to be composed of amorphous silicate and carbon, and variations of its optical properties are discussed. As measure for the distribution of cores and clumps, we use core mass functions derived for various environments. In view of the high densities in very cold central regions, dust and gas temperatures are assumed to be equal. We find that the fraction of mass with temperatures < 8 K in typical low- and high-mass cores is < 20\%. It is possible to obtain higher fractions of very cold gas by placing intermediate- or high-mass cores in a typical low-mass star formation environment. We show that the mass uncertainty arising from FIR to mm modeling of very cold dust emission is smaller than the mass uncertainty due to the unknown dust opacities.
description: 4 pages, 4 figures, accepted for publication in Astronomy & Astrophysics Letters
Hidden roles: why they need to be recognised?
Creators: name: Karoune, Emma
Publisher: name: Zenodo
Year: 2023
Subjects: Research infrastructure roles
Open Research

description: This lightning talk was presented at the Festival of Hidden REF on 21 September 2023. It argues that Hidden roles need to be recognised for the people that work in them, for the research community and for wider society. Find out more about Hidden REF here: https://hidden-ref.org/
Temperature-related effects in the polarization of atoms in a magnetized plasma as a promising feature towards high $^3$He nuclear polarization
Creators: name: Makarchenko, Alexander
name: Kuzmin, Vyacheslav
name: Safiullin, Kajum
name: Tagirov, Murat
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on further investigation of nuclear hyperpolarization of helium-3 in magnetized plasma at a magnetic field of 3.66 T and at different experimental conditions in a dual cell of relatively large volume, compared to those reported in the original polarization of atoms in a magnetized plasma (PAMP) paper by Maul $\textit{et al.}$ [Phys. Rev. A. $\textbf{98}$, 063405 (2018)]. It was found that steady-state nuclear polarizations obtained by this method strongly increase with temperature and rf gas discharge power. We managed to reach almost 8% at the highest possible temperature in our setup which is to date the highest polarization obtained by this method at 10 mbar. It was also shown that atomic oxygen in plasma, considered as an impurity, could be a good probe of plasma parameters relevant for the PAMP process, either the temperature or the metastable $^3$He density. The polarization build-up rates with the cell temperature stabilized near room temperature are found to be of the order of 1 s$^{-1}$ which is by two orders of magnitude faster than was reported in the original PAMP paper for the same filling pressure. These observations promise a further optimization of experimental conditions towards strong and fast hyperpolarization by this method.
description: 21 pages, 9 figures
The design and construction of the MICE Electron-Muon Ranger
Creators: name: Asfandiyarov, R.
name: Bene, P.
name: Blondel, A.
name: Bolognini, D.
name: Cadoux, F.
name: Debieux, S.
name: Drielsma, F.
name: Giannini, G.
name: Graulich, J. S.
name: Husi, C.
name: Karadzhov, Y.
name: Lietti, D.
name: Masciocchi, F.
name: Nicola, L.
name: Messomo, E. Noah
name: Prest, M.
name: Rothenfusser, K.
name: Sandstrom, R.
name: Vallazza, E.
name: Verguilov, V.
name: Wisting, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Electron-Muon Ranger (EMR) is a fully-active tracking-calorimeter installed in the beam line of the Muon Ionization Cooling Experiment (MICE). The experiment will demonstrate ionization cooling, an essential technology needed for the realization of a Neutrino Factory and/or a Muon Collider. The EMR is designed to measure the properties of low energy beams composed of muons, electrons and pions, and perform the identification particle-by-particle. The detector consists of 48 orthogonal layers of 59 triangular scintillator bars. The readout is implemented using FPGA custom made electronics and commercially available modules. This article describes the construction of the detector from its design up to its commissioning with cosmic data.
Co-designing a food hub: workshop materials for collaborative community processes
Creators: name: RAE, JENNIFER
name: Sheridan, Jennifer
name: LARSEN, KIRSTEN
name: Christiaans, Abby
name: Clarke, Ayra
name: Hartung, Helene
name: Fare, Fair Share
name: Open Food Network
Publisher: name: figshare
Year: 2022
Subjects: subject: 120501 Community Planning
subject: FOS: Social and economic geography

description: These workshop materials provide the tools for a community to work together and co-design a food hub that meets their local needs.
 You can find instructions for their use at https://about.openfoodnetwork.org.au/resources/
H2 Mapping on Pt-loaded TiO2 Nanotube Gradient Arrays
Creators: name: Loget, G.
name: Schmuki, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We describe a rapid screening technique for determining the optimal characteristics of nano- photocatalysts for the production of H2 on a single surface. Arrays of TiO2 nanotubes (NTs) with a gradient in length and diameter were fabricated by bipolar anodization and a perpendicular gradient of Pt nanoparticles (NPs) was generated by the toposelective decoration of the TiO2 NTs. Photocatalytic hydrogen evolution was locally triggered with a UV laser beam and the arrays were screened in x- and y-direction for spatially resolved kinetic measurements and the mapping of the optimal hydrogen production. By using this technique, we demonstrate the time-efficient and straightforward determination of the tube dimensions and the Pt amount for an optimized H2 production. The concept holds promise to generally improve the study of many photoreactions as a function of the physicochemical characteristic of nano-photocatalysts, which renders it highly attractive for the optimization of various important chemical processes.
Artibeus fuliginosus Gray 1838
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Artibeus
Artibeus fuliginosus

description: Artibeus fuliginosus Gray, 1838. Mag. Zool. Bot., 2:487. TYPE LOCALITY: "South America". DISTRIBUTION: Colombia; Venezuela; Guyana; Ecuador; Peru; Bolivia; Amazonian Brazil. COMMENT: Probably only a subspecies of jatnaicensis; see Koopman, 1978:15; but also see Handley, 1976, Brigham Young Univ. Sci. Bull., 20(5):31.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 152, DOI: 10.5281/zenodo.7352990
description: {"references": ["Handley, C. O., Jr. 1976. Mammals of the Smithsonian Venezuelan Project. Brigham Young University Science Bulletin, Biological Series, 20: 1 - 91."]}