cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metal-Polymer Functionally Graded Materials for Removing Guided Wave Reflections at Beam End Boundaries
Creators: name: Liew, Chin Kian
name: Veidt, M.
name: Chavara, D.T.
name: Ruys, A.J.
name: Young, C.
name: McCreery, M.
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Functional materials
Neural networks
Mechanical engineering not elsewhere classified

description: This paper investigates the potential of a metal-polymer functionally graded material (FGM) to remove beam end boundary wave reflections that produce complicated interference patterns in the response signals used for guided wave damage identification methodologies. The metal-polymer FGM matches the material properties to a metal beam for total wave transmission on one side and is continuously graded to a viscoelastic polymer on the other side. An Aluminium-Polycarbonate (AI-PC) FGM was fabricated and characterised using microscopy, hardness testing and through-transmission ultrasonics to verify the continuous gradient. Measurements of guided waves on an aluminium beam attached to the FGM on one end show reduction in boundary wave reflections that varies with wave frequency. A damaged aluminium beam attached with the FGM produced promising improvements in a damage identification system.
Search for the effect of massive bodies on atomic spectra and constraints on Yukawa-type interactions of scalar particles
Creators: name: Leefer, N.
name: Gerhardus, A.
name: Budker, D.
name: Flambaum, V. V.
name: Stadnik, Y. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new method to search for hypothetical scalar particles that have feeble interactions with Standard-Model particles. In the presence of massive bodies, these interactions produce a non-zero Yukawa-type scalar-field magnitude. Using radio-frequency spectroscopy data of atomic dysprosium, as well as atomic clock spectroscopy data, we constrain the Yukawa-type interactions of a scalar field with the photon, electron, and nucleons for a range of scalar-particle masses corresponding to length scales $ > 10$ cm. In the limit as the scalar-particle mass $m_ϕ\to 0$, our derived limits on the Yukawa-type interaction parameters are: $Λ_γ\gtrsim 8 \times 10^{19}$ GeV, $Λ_e \gtrsim 1.3 \times 10^{19}$ GeV, and $Λ_N \gtrsim 6 \times 10^{20}$ GeV. Our measurements also constrain combinations of interaction parameters, which cannot otherwise be probed with traditional anomalous-force measurements. We suggest further measurements to improve on the current level of sensitivity.
description: 7 pages, 2 figures
Sparsey: Event Recognition via Deep Hierarchical Spare Distributed Codes
Creators: name: Rinkus, Gerard J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: 68

description: Visual cortex's hierarchical, multi-level organization is captured in many biologically inspired computational vision models, the general idea being that progressively larger scale, more complex spatiotemporal features are represented in progressively higher areas. However, most earlier models use localist representations (codes) in each representational field, which we equate with the cortical macrocolumn (mac), at each level. In localism, each represented feature/event (item) is coded by a single unit. Our model, Sparsey, is also hierarchical but crucially, uses sparse distributed coding (SDC) in every mac in all levels. In SDC, each represented item is coded by a small subset of the mac's units. SDCs of different items can overlap and the size of overlap between items can represent their similarity. The difference between localism and SDC is crucial because SDC allows the two essential operations of associative memory, storing a new item and retrieving the best-matching stored item, to be done in fixed time for the life of the model. Since the model's core algorithm, which does both storage and retrieval (inference), makes a single pass over all macs on each time step, the overall model's storage/retrieval operation is also fixed-time, a criterion we consider essential for scalability to huge datasets. A 2010 paper described a nonhierarchical version of this model in the context of purely spatial pattern processing. Here, we elaborate a fully hierarchical model (arbitrary numbers of levels and macs per level), describing novel model principles like progressive critical periods, dynamic modulation of principal cells' activation functions based on a mac-level familiarity measure, representation of multiple simultaneously active hypotheses, a novel method of time warp invariant recognition, and we report results showing learning/recognition of spatiotemporal patterns.
description: This is a manuscript form of a paper published in Frontiers in Computational Neuroscience in 2014 (http://dx.doi.org/10.3389/fncom.2014.00160). 65 pages, 28 figures, 8 tables
Solving Large-Scale Dynamic Vehicle Routing Problems with Stochastic Requests
Creators: name: Zhang, Jian
name: Luo, Kelin
name: Florio, Alexandre M.
name: Van Woensel, Tom
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90B06

description: Dynamic vehicle routing problems (DVRPs) arise in several applications such as technician routing, meal delivery, and parcel shipping. We consider the DVRP with stochastic customer requests (DVRPSR), in which vehicles must be routed dynamically with the goal of maximizing the number of served requests. We model the DVRPSR as a multi-stage optimization problem, where the first-stage decision defines route plans for serving scheduled requests. Our main contributions are knapsack-based linear models to approximate accurately the expected reward-to-go, measured as the number of accepted requests, at any state of the stochastic system. These approximations are based on representing each vehicle as a knapsack with a capacity given by the remaining service time available along the vehicle's route. We combine these approximations with optimal acceptance and assignment decision rules and derive efficient and high-performing online scheduling policies. We further leverage good predictions of the expected reward-to-go to design initial route plans that facilitate serving dynamic requests. Computational experiments on very large instances based on a real street network demonstrate the effectiveness of the proposed methods in prescribing high-quality offline route plans and online scheduling decisions.
description: 44 pages
Artibeus hartii Thomas 1892
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 hartii

description: Artibeus hartii Thomas, 1892. Ann. Mag. Nat. Hist., ser. 6, 10: 409. TYPE LOCALITY: Trinidad and Tobago, Trinidad, Port of Spain. DISTRIBUTION: Bolivia and Venezuela to Jalisco and Tamaulipas (Mexico); Arizona (USA); Trinidad. COMMENT: Formerly included in Enchisthenes; see Jones and Carter, 1979:8. Webster and Jones, 1980, Occas. Pap. Mus. Texas Tech Univ., 68:1-6, reviewed the Arizona distribution.
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": ["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 R. J. Baker. 1980. Chiroderma improvisum. Mammalian Species, 134: 1 - 2."]}
Regional-Local Adversarially Learned One-Class Classifier Anomalous Sound Detection in Global Long-Term Space
Creators: name: Sha, Yu
name: Faber, Johannes
name: Gou, Shuiping
name: Liu, Bo
name: Li, Wei
name: Schramm, Stefan
name: Stoecker, Horst
name: Steckenreiter, Thomas
name: Vnucec, Domagoj
name: Wetzstein, Nadine
name: Widl, Andreas
name: Zhou, Kai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Anomalous sound detection (ASD) is one of the most significant tasks of mechanical equipment monitoring and maintaining in complex industrial systems. In practice, it is vital to precisely identify abnormal status of the working mechanical system, which can further facilitate the failure troubleshooting. In this paper, we propose a multi-pattern adversarial learning one-class classification framework, which allows us to use both the generator and the discriminator of an adversarial model for efficient ASD. The core idea is learning to reconstruct the normal patterns of acoustic data through two different patterns of auto-encoding generators, which succeeds in extending the fundamental role of a discriminator from identifying real and fake data to distinguishing between regional and local pattern reconstructions. Furthermore, we present a global filter layer for long-term interactions in the frequency domain space, which directly learns from the original data without introducing any human priors. Extensive experiments performed on four real-world datasets from different industrial domains (three cavitation datasets provided by SAMSON AG, and one existing publicly) for anomaly detection show superior results, and outperform recent state-of-the-art ASD methods.
FP-Loc: Lightweight and Drift-free Floor Plan-assisted LiDAR Localization
Creators: name: Gao, Ling
name: Kneip, Laurent
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We present a novel framework for floor plan-based, full six degree-of-freedom LiDAR localization. Our approach relies on robust ceiling and ground plane detection, which solves part of the pose and supports the segmentation of vertical structure elements such as walls and pillars. Our core contribution is a novel nearest neighbour data structure for an efficient look-up of nearest vertical structure elements from the floor plan. The registration is realized as a pair-wise regularized windowed pose graph optimization. Highly efficient, accurate and drift-free long-term localization is demonstrated on multiple scenes.
Phase-field modeling of chemical control of polarization stability and switching dynamics in ferroelectric thin film
Creators: name: Cao, Ye
name: Kalinin, Sergei V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Phase-field simulation (PFS) have revolutionized the understanding of domain structure and switching behavior in ferroelectric thin films and ceramics. Generally, PFS is based on solution of a (set) of Ginzburg-Landau equations for a defined order parameter field(s) under physical boundary conditions (BCs) of fixed potential or charge. While well-matched to the interfaces in bulk materials and devices, these BCs are generally not applicable to free ferroelectric surfaces. Here, we developed a self-consistent phase-field model with boundary conditions based on electrochemical equilibria. We chose Pb(Zr0.2Ti0.8)O3 ultrathin film consisting of (001) oriented single tetragonal domain (Pz) as a model system, and systematically studied the effects of oxygen partial pressure, temperature and surface ion on the ferroelectric state, and compared it with the case of complete screening. We have further explored the polarization switching induced by the oxygen partial pressure and observed pronounced size effect induced by chemical screening. Our work thus helps to understand the emergent phenomena in ferroelectric thin films brought about by the electrochemical ionic surface compensations.
description: 37 pages, 9 figures
Artibeus hirsutus 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 hirsutus

description: Artibeus hirsutus K. Andersen, 1906. Ann. Mag. Nat. Hist., ser. 7, 18:420. TYPE LOCALITY: Mexico, Michoacan, La Salada. DISTRIBUTION: C. Sonora to Guerrero (Mexico). ISIS NUMBER: 5301405008026004001.
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
Chalcogenide Perovskites- an Emerging Class of Ionic Semiconductors
Creators: name: Pereraa, Samanthe
name: Huia, Haolei
name: Zhao, Chuan
name: Xue, Hongtao
name: Sun, Fan
name: Deng, Chenhua
name: Gross, Nelson
name: Milleville, Chris
name: Xu, Xiaohong
name: Watson, David F.
name: Weinstein, Bernard
name: Sun, Yi-Yang
name: Zhang, Shengbai
name: Zeng, Hao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the synthesis and characterization of a novel class of ionic semiconductor materials- inorganic chalcogenide perovskites. Several different compounds including BaZrS3, CaZrS3, SrTiS3 and SrZrS3 were synthesized by high temperature sulfurization of their oxide counterparts. Their crystal structures were identified by XRD and composition by EDX. UV-vis and photoluminescence measurements confirmed that they are direct gap semiconductors with band gap values consistent with theoretical predictions. By adopting an anion alloying approach, we demonstrate widely tunable band gap from 1.73 eV to 2.87 eV. These strongly ionic semiconductors provide a new avenue for engineering the semiconducting properties for applications such as energy harvesting, solid state lighting and sensing.
Paraconsistent Gödel modal logic
Creators: name: Bílková, Marta
name: Frittella, Sabine
name: Kozhemiachenko, Daniil
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03B52, 03B53

description: We introduce a~paraconsistent modal logic $\mathbf{K}\mathsf{G}^2$, based on Gödel logic with coimplication (bi-Gödel logic) expanded with a De Morgan negation $\neg$. We use the logic to formalise reasoning with graded, incomplete and inconsistent information. Semantics of $\mathbf{K}\mathsf{G}^2$ is two-dimensional: we interpret $\mathbf{K}\mathsf{G}^2$ on crisp frames with two valuations $v_1$ and $v_2$, connected via $\neg$, that assign to each formula two values from the real-valued interval $[0,1]$. The first (resp., second) valuation encodes the positive (resp., negative) information the state gives to a~statement. We obtain that $\mathbf{K}\mathsf{G}^2$ is strictly more expressive than the classical modal logic $\mathbf{K}$ by proving that finitely branching frames are definable and by establishing a faithful embedding of $\mathbf{K}$ into $\mathbf{K}\mathsf{G}^2$. We also construct a~constraint tableau calculus for $\mathbf{K}\mathsf{G}^2$ over finitely branching frames, establish its decidability and provide a~complexity evaluation.
Artibeus inopinatus Davis and Carter 1964
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 inopinatus

description: Artibeus inopinatus Davis and Carter, 1964. Proc. Biol. Soc. Wash., 77: 119. TYPE LOCALITY: Honduras, Choluteca, Choluteca. DISTRIBUTION: El Salvador; Honduras; Nicaragua. COMMENT: Possibly a subspecies of hirsutus (JKJ). ISIS NUMBER: 5301405008026005001.
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
Study of extreme states of matter at high energy densities and high strain rates with powerful lasers
Creators: name: Krasyuk, Igor K.
name: Pashinin, Pavel P.
name: Semenov, Andrey Yu.
name: Khishchenko, Konstantin V.
name: Fortov, Vladimir E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the paper, a review of most important results of experimental studies of thermonuclear plasma in conical targets, generation of shock waves and spallation phenomena in different materials, which were carried out at laser facilities of the A M Prokhorov General Physics Institute RAS since 1977, is presented.
description: 14 pages, 9 figures
[NDAC/LO/005] WP3100: Preprocessing of IDT data (Definition)
Creators: name: Lindegren, Lennart
Publisher: name: Zenodo
Year: 1982
Subjects: Hipparcos

description: Technical note written as input to the early studies of the ESA space astrometry project Hipparcos.
description: Corrigendum in NDAC/LO/009 at https://doi.org/10.5281/zenodo.8124482
Gene-Environment Interplay in the Social Sciences
Creators: name: Pereira, Rita Dias
name: Biroli, Pietro
name: Galama, Titus
name: von Hinke, Stephanie
name: van Kippersluis, Hans
name: Rietveld, Cornelius A.
name: Thom, Kevin
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Nature (one's genes) and nurture (one's environment) jointly contribute to the formation and evolution of health and human capital over the life cycle. This complex interplay between genes and environment can be estimated and quantified using genetic information readily available in a growing number of social science data sets. Using genetic data to improve our understanding of individual decision making, inequality, and to guide public policy is possible and promising, but requires a grounding in essential genetic terminology, knowledge of the literature in economics and social-science genetics, and a careful discussion of the policy implications and prospects of the use of genetic data in the social sciences and economics.
description: Newest version before the publication of the article
Characterization of high-temperature performance of cesium vapor cells with anti-relaxation coating
Creators: name: Li, Wenhao
name: Balabas, Mikhail
name: Peng, Xiang
name: Pustelny, Szymon
name: Wickenbrock, Arne
name: Guo, Hong
name: Budker, Dmitry
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Vapor cells with antirelaxation coating are widely used in modern atomic physics experiments due to the coating's ability to maintain the atoms' spin polarization during wall collisions. We characterize the performance of vapor cells with different coating materials by measuring longitudinal spin relaxation and vapor density at temperatures up to 95°C. We found that the spin-projection-noise-limited sensitivity for atomic magnetometers with such cells improves with temperature, which demonstrates the potential of antirelaxation coated cells in applications of future high-sensitivity magnetometers.
Artibeus jatnaicensis Leach 1821
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 jatnaicensis

description: Artibeus jatnaicensis Leach, 1821. Trans. Linn. Soc. Lond., 13:75. TYPE LOCALITY: Jamaica. DISTRIBUTION: Sinaloa and Tamaulipas (Mexico) to Guianas, Trinidad; Tobago; Greater Antilles; Lesser Antilles. Amazonian Brazil (JRT; KFK disagrees). COMMENT: Includes trinitatis and preceps (KFK). Bats often treated as jatnaicensis most probably belong to several additional species; they are fraterculus and planirostris (Koopman, 1978:14- 16) and fuliginosus (Handley, 1976, Brigham Young Univ. Sci. Bull., 20(5):31) and are so treated here. ISIS NUMBER: 5301405008026006001.
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."]}
A Comparison of Anodic TiO2 Nanotube Membranes used for Front-side Illuminated Dye-Sensitized Solar Cells
Creators: name: Mohammadpour, Fatemeh
name: Moradi, Mahmood
name: Cha, Gihoon
name: So, Seulgi
name: Lee, Kiyoung
name: Altomare, Marco
name: Schmuki, Patrik
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the present work we compare TiO2 nanotube lift-off strategies for the construction of front-side illuminated dye-sensitized solar cells (DSSCs). Anodic nanotube layers were detached from the metallic back contact by using different techniques and transferred onto an FTO substrate. We show that if we use an optimized potential step treatment to fabricate membranes, DSSC cell efficiencies can be significantly increased (>8%). This improved efficiency is ascribed to higher specific dye-loading and enhanced electron transport properties of optimally fabricated TiO2 nanotube membranes.
[NDAC/LO/009] Errata (2)
Creators: name: Lindegren, Lennart
Publisher: name: Zenodo
Year: 1982
Subjects: Hipparcos

description: Technical note written as input to the early studies of the ESA space astrometry project Hipparcos.
description: Corrigendum to NDAC/LO/005 at https://doi.org/10.5281/zenodo.8124406
Driving-induced multiple ${\cal PT}$-symmetry breaking transitions and reentrant localization transitions in non-Hermitian Floquet quasicrystals
Creators: name: Zhou, Longwen
name: Han, Wenqian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The cooperation between time-periodic driving fields and non-Hermitian effects could endow systems with distinctive spectral and transport properties. In this work, we uncover an intriguing class of non-Hermitian Floquet matter in one-dimensional quasicrystals, which is characterized by the emergence of multiple driving-induced ${\cal PT}$-symmetry breaking/restoration, mobility edges, and reentrant localization transitions. These findings are demonstrated by investigating the spectra, level statistics, inverse participation ratios and wavepacket dynamics of a periodically quenched nonreciprocal Harper model. Our results not only unveil the richness of localization phenomena in driven non-Hermitian quasicrystals, but also highlight the advantage of Floquet approach in generating unique types of nonequilibrium phases in open systems.
description: 13 pages, 9 figures, accepted version
Probing Dy3+ magnetic moments in multiferroic perovskite DyMnO3 by optical spectroscopy
Creators: name: Kashchenko, M. A.
name: Klimin, S. A.
name: Balbashov, A. M.
name: Popova, M. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a detailed temperature-dependent spectroscopic study of DyMnO3 single crystals with distorted perovskite structure. Energies of 36 crystal-field levels of Dy3+ in paramagnetic DyMnO3 were determined. The Dy3+ ground Kramers doublet does not split at T_N^Mn = 39 K and splits below Tlock = 18 K. The splitting grows fast at temperatures near T_N^Dy = 6.5 K and reaches Δ0 = 11 cm-1 at 4 K. Using the experimental temperature dependence Δ0(T), we calculate the dysprosium magnetic moment mDy(T) and the dysprosium contribution into specific heat and magnetic susceptibility. Analysing all the experimental data, we conclude that the Dy-Mn interaction is of the Dzyaloshinskii-Moriya type.
description: 5 pages, 4 figures
Observational window effects on multi-object Reverberation Mapping
Creators: name: Malik, Umang
name: Sharp, Rob
name: Martini, Paul
name: Davis, Tamara M.
name: Tucker, Brad E.
name: Yu, Zhefu
name: Penton, Andrew
name: Lewis, Geraint F.
name: Calcino, Josh
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Contemporary reverberation mapping campaigns are employing wide-area photometric data and high-multiplex spectroscopy to efficiently monitor hundreds of active galactic nuclei (AGN). However, the interaction of the window function(s) imposed by the observation cadence with the reverberation lag and AGN variability time scales (intrinsic to each source over a range of luminosities) impact our ability to recover these fundamental physical properties. Time dilation effects due to the sample source redshift distribution introduces added complexity. We present comprehensive analysis of the implications of observational cadence, seasonal gaps and campaign baseline duration (i.e., the survey window function) for reverberation lag recovery. We find the presence of a significant seasonal gap dominates the efficacy of any given campaign strategy for lag recovery across the parameter space, particularly for those sources with observed-frame lags above 100 days. Using the OzDES survey as a baseline, we consider the implications of this analysis for the 4MOST/TiDES campaign providing concurrent follow-up of the LSST deep-drilling fields, as well as upcoming programs. We conclude that the success of such surveys will be critically limited by the seasonal visibility of some potential field choices, but show significant improvement from extending the baseline. Optimising the sample selection to fit the window function will improve survey efficacy.
description: 16 pages, 16 figures. Accepted by MNRAS
Psi(2S) Production at the LHC
Creators: name: Du, Xiaojian
name: Rapp, Ralf
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the production of $ψ(2S)$ and the pertinent double ratio of its nuclear modification factor ($R_{\rm AA}$) over that of the $J/ψ$ in Pb-Pb collisions at the LHC. Based on a transport model with temperature dependent reaction rates, a sequential regeneration pattern emerges: the larger $ψ(2S)$ width, relative to the $J/ψ$, around and below the critical temperature, implies that most of the $ψ(2S)$ states are regenerated later in the evolution of the fireball. This has noticeable consequences for the transverse-momentum ($p_T$) spectra of the regenerated charmonia. While the total yield of $ψ(2S)$ meson remains smaller than those of $J/ψ$'s, their harder $p_T$ spectra can produce a double ratio above unity for a $p_T>3$GeV cut, as applied by the CMS collaboration. A significant uncertainty in our calculations is associated with the values of the temperature where most of the $ψ(2S)$ regeneration occurs, the quantitative temperature dependence of its inelastic width.
description: 4 pages, 4 figures; Proceeding on Strangeness in Quark Matter 2016 (Berkeley, CA, USA), June 27-July 1, 2016
Externally-driven plasma models as candidates for pulsar radio emission
Creators: name: Rahaman, Sk. Minhajur
name: Mitra, Dipanjan
name: Melikidze, George I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Coherent radio emission from pulsars originates from excited plasma waves in an ultra-relativistic and strongly magnetized electron-positron pair plasma streaming along the open magnetic field lines of the pulsar. Traditional coherent radio emission models have relied on instabilities in this pair plasma. Recently alternative models have been suggested. These models appeal to direct coupling of the external electromagnetic field to the superluminal O-mode ($lt_2$ mode) during the time-dependent pair cascade process at the polar gap. The objective of this work is to provide generic constraints on plasma models based on $lt_2$ mode using realistic pulsar parameters. We find that the very short timescale associated with pair cascades does not allow $lt_{2}$ mode to be excited at radio frequencies and the impulsive energy transfer can only increase the kinetic spread ("temperature") of the pair plasma particles. Moreover, under homogeneous plasma conditions, plasma waves on both branches of O-mode (i.e. superluminal $lt_2$ and subluminal $lt_1$) cannot escape the plasma. In the strongly magnetized pair plasma, only the extraordinary mode ($t$ mode) can escape freely. We show that any generic fictitious mechanisms does not result in the wave electric field of $t$ mode to have predominant orientation either parallel or perpendicular to the magnetic field plane as observed. Such fictitious mechanisms will inevitably lead to depolarization of signals and cannot account for the highly polarized single pulses observed in pulsars. We suggest coherent curvature radiation as a promising candidate for pulsar radio emission mechanism.
description: Accepted for publication in MNRAS
Artibeus lituratus
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 lituratus

description: Artibeus lituratus (Olfers, 1818). In Eschwege, Neue Bibl. Reisenb., p. 224. TYPE LOCALITY: Paraguay, Asuncion. DISTRIBUTION: Sinaloa and Tamaulipas (Mexico) to S. Brazil, N. Argentina, and Bolivia; Trinidad; Tobago; S. Lesser Antilles. COMMENT: Includes palmarutn but not fallax, hercules, or preceps (KFK). Includes intertnedius; see Jones and Carter, 1976:28. See also comments under jatnaicensis. ISIS NUMBER: 5301405008026007001.
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": ["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."]}
Strong analog classical simulation of coherent quantum dynamics
Creators: name: Wang, Dong-Sheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A strong analog classical simulation of general quantum evolution is proposed, which serves as a novel scheme in quantum computation and simulation. The scheme employs the approach of geometric quantum mechanics and quantum informational technique of quantum tomography, which applies broadly to cases of mixed states, nonunitary evolution, and infinite dimensional systems. The simulation provides an intriguing classical picture to probe quantum phenomena, namely, a coherent quantum dynamics can be viewed as a globally constrained classical Hamiltonian dynamics of a collection of coupled particles or strings. Efficiency analysis reveals a fundamental difference between the locality in real space and locality in Hilbert space, the latter enables efficient strong analog classical simulations. Examples are also studied to highlight the differences and gaps among various simulation methods.
description: 11 pages, 5 figures
New Insights on Luminous Infrared Galaxies from JWST
Creators: name: U, Vivian
Publisher: name: Zenodo
Year: 2023
Subjects: Surveys of Galaxies before and around Cosmic Noon

description: Luminous infrared galaxies emit the bulk of their luminosities in the infrared, typically attributed to a combination of high levels of dust, star formation, and AGN activity. In the nearby universe, they are commonly associated with galaxy mergers, a mechanism that gives rise to heightened star-forming rates and black hole growth. For over a decade, the Great Observatories All-sky LIRG Survey has amassed multi-wavelength X-ray to radio data to investigate the starburst-AGN connection in these LIRGs as a population. Most recently, our campaign has extended to detailed studies of the dusty nature of LIRGs with spatially-resolved infrared observations from JWST. In this talk, I will review early results from our GOALS-JWST Early Release Science and General Observer programs that address the questions of how the triggering of AGN and its feedback effect depend on nuclear environments, and discuss implications for the expected transformative impact on our understanding of these important phenomena as enabled by Roman’s high-resolution and wide-field imaging capabilities.
On the detectability of gravitational waves from primordial black holes orbiting Sgr A*
Creators: name: Bondani, Stefano
name: Haardt, Francesco
name: Sesana, Alberto
name: Barausse, Enrico
name: Dotti, Massimo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this work we characterize the expected gravitational wave signal detectable by the planned space-borne interferometer LISA and the proposed next generation space-borne interferometer $μ$Ares arising from a population of primordial black holes orbiting Sgr A*, the super-massive black hole at the Galactic center. Assuming that such objects indeed form the entire diffuse mass allowed by the observed orbit of S2 in the Galactic center, under the simplified assumption of circular orbits and monochromatic mass function, we assess the expected signal in gravitational waves, either from resolved and non-resolved sources. We estimate a small but non negligible chance of $\simeq$ 10% of detecting one single 1 M$_{\odot}$ primordial black hole with LISA in a 10-year-long data stream, while the background signal due to unresolved sources would essentially elude any reasonable chance of detection. On the contrary, $μ$Ares, with a $\simeq$ 3 orders-of-magnitude better sensitivity at $\simeq$ 10$^{-5}$ Hz, would be able to resolve $\simeq$ 140 solar mass primordial black holes in the same amount of time, while the unresolved background should be observable with an integrated signal-to-noise ratio $\gtrsim$ 100. Allowing the typical PBH mass to be in the range 0.01-10 M$_{\odot}$ would increase LISA chance of detection to $\simeq$ 40% towards the lower limit of the mass spectrum. In the case of $μ$Ares, instead, we find a "sweet spot" just about 1 M$_{\odot}$, a mass for which the number of resolvable events is indeed maximized.
description: 10 pages, 11 figures; Referee reviewed
Unveiling Extreme Anisotropy in Elastic Structured Media
Creators: name: Lefebvre, Gautier
name: Antonakakis, Tryfon
name: Achaoui, Younes
name: Craster, Richard
name: Guenneau, Sebastien
name: Sebbah, Patrick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Periodic structures can be engineered to exhibit unique properties observed at symmetry points, such as zero group velocity, Dirac cones and saddle points; identifying these, and the nature of the associated modes, from a direct reading of the dispersion surfaces is not straightforward, especially in three-dimensions or at high frequencies when several dispersion surfaces fold back in the Brillouin zone. A recently proposed asymptotic high frequency homogenisation theory is applied to a challenging time-domain experiment with elastic waves in a pinned metallic plate. The prediction of a narrow high-frequency spectral region where the effective medium tensor dramatically switches from positive definite to indefinite is confirmed experimentally; a small frequency shift of the pulse carrier results in two distinct types of highly anisotropic modes. The underlying effective equation mirrors this behaviour with a change in form from elliptic to hyperbolic exemplifying the high degree of wave control available and the importance of a simple and effective predictive model.
description: 5 pages, 4 figures
Information-Theoretic Odometry Learning
Creators: name: Zhang, Sen
name: Zhang, Jing
name: Tao, Dacheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper, we propose a unified information theoretic framework for learning-motivated methods aimed at odometry estimation, a crucial component of many robotics and vision tasks such as navigation and virtual reality where relative camera poses are required in real time. We formulate this problem as optimizing a variational information bottleneck objective function, which eliminates pose-irrelevant information from the latent representation. The proposed framework provides an elegant tool for performance evaluation and understanding in information-theoretic language. Specifically, we bound the generalization errors of the deep information bottleneck framework and the predictability of the latent representation. These provide not only a performance guarantee but also practical guidance for model design, sample collection, and sensor selection. Furthermore, the stochastic latent representation provides a natural uncertainty measure without the needs for extra structures or computations. Experiments on two well-known odometry datasets demonstrate the effectiveness of our method.
description: Accepted to International Journal of Computer Vision (IJCV)
Crossed Andreev reflection in spin-polarized chiral edge states due to the Meissner effect
Creators: name: Galambos, Tamás Haidekker
name: Ronetti, Flavio
name: Hetényi, Bence
name: Loss, Daniel
name: Klinovaja, Jelena
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider a hybrid quantum Hall-superconductor system, where a superconducting finger with oblique profile is wedged into a two-dimensional electron gas in the presence of a perpendicular magnetic field, as considered by Lee et al., Nat. Phys. 13, 693 (2017). The electron gas is in the quantum Hall regime at filling factor $ν=1$. Due to the Meissner effect, the perpendicular magnetic field close to the quantum Hall-superconductor boundary is distorted and gives rise to an in-plane component of the magnetic field. This component enables nonlocal crossed Andreev reflection between the spin-polarized chiral edge states running on opposite sides of the superconducting finger, thus opening a gap in the spectrum of the edge states without the need of spin-orbit interaction or nontrivial magnetic textures. We compute numerically the transport properties of this setup and show that a negative resistance exists as a consequence of nonlocal Andreev processes. We also obtain numerically the zero-energy local density of states, which systematically shows peaks stable to disorder. The latter result is compatible with the emergence of Majorana bound states.
description: 21 pages, 19 figures
Reality from maximizing overlap in the periodic complex action theory
Creators: name: Nagao, Keiichi
name: Nielsen, Holger Bech
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the periodic complex action theory (CAT) by imposing a periodic condition in the future-included CAT where the time integration is performed from the past to the future, and extend a normalized matrix element of an operator $\hat{\mathcal O}$, which is called the weak value in the real action theory, to another expression $\langle \hat{\mathcal O} \rangle_{\mathrm{periodic}~\mathrm{time}}$. We present two theorems stating that $\langle \hat{\mathcal O} \rangle_{\mathrm{periodic}~\mathrm{time}}$ becomes real for $\hat{\mathcal O}$ being Hermitian with regard to a modified inner product that makes a given non-normal Hamiltonian $\hat{H}$ normal. The first theorem holds for a given period $t_p$ in a case where the number of eigenstates having the maximal imaginary part $B$ of the eigenvalues of $\hat{H}$ is just one, while the second one stands for $t_p$ selected such that the absolute value of the transition amplitude is maximized in a case where $B \leq 0$ and $|B|$ is much smaller than the distances between any two real parts of the eigenvalues of $\hat{H}$. The latter proven via a number-theoretical argument suggests that, if our universe is periodic, then even the period could be an adjustment parameter to be determined in the Feynman path integral. This is a variant type of the maximization principle that we previously proposed.
description: Latex 14 pages, typos corrected, presentation improved, the final version to appear in Prog.Theor.Exp.Phys
Artibeus phaeotis
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 phaeotis

description: Artibeus phaeotis (Miller, 1902). Proc. Acad. Nat. Sci. Phila., 54:405. TYPE LOCALITY: Mexico, Yucatan, Chichen-Itza. DISTRIBUTION: Veracruz and Sinaloa (Mexico) to Ecuador and Guyana. COMMENT: Includes nanus and turpis; see Jones and Lawlor, 1965, Univ. Kans. Publ. Mus. Nat. Hist., 16:412, and Davis, 1970, Southwest. Nat., 14: 389-402. Includes ravus (KFK). ISIS NUMBER: 5301405008026008001.
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": ["Jones, J. K., Jr., and T. E. Lawlor. 1965. Mammals from Isla Cozumel, Mexico, with description of a new species of harvest mouse. University of Kansas Publications, Museum of Natural History, 16: 409 - 419.", "Davis, W. B. 1970. A review of the small fruit bats (genus Artibeus) of Middle America. Part II. Southwestern Naturalist, 14: 389 - 402."]}
Comic ray flux anisotropies caused by astrospheres
Creators: name: Scherer, K.
name: Strauss, R. D.
name: Ferreira, S. E. S.
name: Fichtner, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Huge astrospheres or stellar wind bubbles influence the propagation of cosmic rays at energies up to the TeV range and can act as small-scale sinks decreasing the cosmic ray flux. We model such a sink (in 2D) by a sphere of radius 10\,pc embedded within a sphere of a radius of 1\,kpc. The cosmic ray flux is calculated by means of backward stochastic differential equations from an observer, which is located at $r_{0}$, to the outer boundary. It turns out that such small-scale sinks can influence the cosmic ray flux at the observer's location by a few permille (i.e\ a few 0.1\%), which is in the range of the observations by IceCube, Milagro and other large area telescopes.
description: 10 pages, 4 Figures
Big Bounce Genesis and Possible Experimental Tests -- A Brief Review
Creators: name: Cheung, Yeuk-Kwan E.
name: Li, Changhong
name: Vergados, J. D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We review the recent status of big bounce genesis as a new possibility of using dark matter particle's mass and interaction cross section to test the existence of a bounce universe at the early stage of evolution in our currently observed universe. To study the dark matter production and evolution inside the bounce universe, called big bounce genesis for short, we propose a model independent approach. We shall present the motivation for proposing big bounce as well the model independent predictions which can be tested by dark matter direct searches. A positive finding shall have profound impact on our understanding of the early universe physics.
description: 25 pages, 6 figures
Effect of interfacial intermixing on the Dzyaloshinskii-Moriya interaction in Pt/Co/Pt
Creators: name: Wells, Adam W. J.
name: Shepley, Philippa M.
name: Marrows, Christopher H.
name: Moore, Thomas A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the effect of sputter-deposition conditions, namely substrate temperature and chamber base pressure, upon the interface quality of epitaxial Pt/Co/Pt thin films with perpendicular magnetic anisotropy. Here we define interface quality to be the inverse of the sum in quadrature of roughness and intermixing. We find that samples with the top Co/Pt layers grown at 250 degrees C exhibit a local maximum in roughness-intermixing and that the interface quality is better for lower or higher deposition temperatures, up to 400 degrees C, above which the interface quality degrades. Imaging the expansion of magnetic domains in an in-plane field using wide-field Kerr microscopy, we determine the interfacial Dzyaloshinskii-Moriya interaction (DMI) in films in the deposition temperature range 100 degrees C to 300 degrees C. The net DMI is linked to the difference in top and bottom Co interface qualities; the net DMI increases as the difference between top and bottom Co interface quality increases. Furthermore, for sufficiently low base pressures, the net DMI increases linearly with the deposition temperature, indicating that fine-tuning of the DMI may be achieved via the deposition conditions.
description: 8 pages, 9 figures
The formation of an inverse S-shaped active-region filament driven by sunspot motion and magnetic reconnection
Creators: name: Yan, X. L.
name: Priest, E. R.
name: Guo, Q. L.
name: Xue, Z. K.
name: Wang, J. C.
name: Yang, L. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a detailed study of the formation of an inverse S-shaped filament prior to its eruption in active region NOAA 11884 from October 31 to November 2, 2013. In the initial stage, clockwise rotation of a small positive sunspot around the main negative trailing sunspot formed a curved filament. Then the small sunspot cancelled with negative magnetic flux to create a longer active-region filament with an inverse S-shape. At the cancellation site a brightening was observed in UV and EUV images and bright material was transferred to the filament. Later the filament erupted after cancellation of two opposite polarities under the upper part of the filament. Nonlinear force-free field (NLFFF) extrapolation of vector photospheric fields suggests that the filament may have a twisted structure, but this cannot be confirmed from the current observations.
description: 26 pages, 11 figures, accepted for publication in ApJ