cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design of Face Centered Cubic Co81.8Si9.1B9.1 with High Magnetocrystalline Anisotropy
Creators: name: Zhang, Jiliang
name: Shan, Guangcun
name: Zhang, Yuefei
name: Ding, Fazhu
name: Shek, Chan Hung
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Despite the composition close to glassy forming alloys, face centered cubic (FCC) Co81.8Si9.1B9.1, designed based on Co9B atomic cluster (polyhedral), are synthesized as singlephase ribbons successfully. These ribbons, with grain sizes of ca. 92 nm, show supreme ductility and strong orientation along (111), which couples with shape anisotropy leading to high magnetocrystalline anisotropy comparable to Co rich Co-Pt nanoscale thin films, with a coercivity of 430 Oe and squareness of 0.82 at room temperature. The stability and magnetic behaviors of the phase are discussed based on experimental electronic structure. This work not only develops low cost Co-based materials for hard magnetic applications, but also extends the atomic cluster model developed for amorphous alloys into the design of new crystalline materials.
description: 11 pages
Disordered XY models and Coulomb gases: renormalization via traveling waves
Creators: name: Carpentier, David
name: Doussal, Pierre Le
Publisher: name: arXiv
Year: 1998
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We present a novel RG approach to 2D random XY models using direct and replicated Coulomb gas methods. By including fusion of environments (charge fusion in the replicated CG) it follows the distribution of local disorder, found to obey a Kolmogorov non linear equation (KPP) with traveling wave solutions. At low T and weak disorder it yields a glassy XY phase with broad distributions and precise connections to Derrida's GREM. Finding marginal operators at the disorder-induced transition is related to the front velocity selection problem in KPP equations yielding new critical behaviour. The method is applied to critical random Dirac problems.
description: 5 pages, 1 figure, misprints corrected
No CPT Violation from Tilted Brane in Neutral Meson--Antimeson Systems
Creators: name: Cvetic, G.
name: Kang, S. K.
name: Kim, C. S.
name: Lee, K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Tilted brane in theories with large compact extra dimensions leads to spontaneous symmetry breaking of the Lorentz and rotational invariance in four dimensions, as shown by Dvali and Shifman. In this brief report, we point out that the mentioned Lorentz symmetry breaking, although leading to the CPT--violating interaction terms, cannot lead to the CPT violation in the experimentally interesting $K$--${\bar K}$ and analogous systems.
description: 5 pages, RevTex
The Loop Algorithm
Creators: name: Evertz, H. G.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A review of the Loop Algorithm, its generalizations, and its relation to some other Monte Carlo techniques is given. The loop algorithm is a Quantum Monte Carlo procedure which employs nonlocal changes of worldline configurations, determined by local stochastic decisions. It is based on a formulation of quantum models of any dimension in an extended ensemble of worldlines and graphs, and is related to Swendsen-Wang algorithms. It can be represented directly on an operator level, both with a continuous imaginary time path integral and with the stochastic series expansion (SSE). It overcomes many of the difficulties of traditional worldline simulations. Autocorrelations are reduced by orders of magnitude. Grand-canonical ensembles, off-diagonal operators, and variance reduced estimators are accessible. In some cases, infinite systems can be simulated. For a restricted class of models, the fermion sign problem can be overcome. Transverse magnetic fields are handled efficiently, in contrast to strong diagonal ones. The method has been applied successfully to a variety of models for spin and charge degrees of freedom, including Heisenberg and XYZ spin models, hard-core bosons, Hubbard, and tJ-models. Due to the improved efficiency, precise calculations of asymptotic behavior and of quantum critical exponents have been possible.
description: Third Edition, July 2002. (78 pages, 11 figures). To appear in Adv.Phys. Updated. New chapter on Operator Formulation, with continuous time and with SSE
A family of scalar-Einstein and vacuum Brans-Dicke axisymmetric solutions
Creators: name: Chauvineau, Bertrand
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new method is proposed, that establishes a one to one correspondance between the whole set of static axially symmetric vacuum GR solutions and a specific class of stationary axially symmetric scalar-Einstein solutions having a given mass and a given angular momentum. The method explicitly takes advantage of the Kerr metric Ricci flatness. This also results in a class of stationary axially symmetric vacuum, ie Kerrlike, Brans-Dicke solutions. A particular solution, that is asymptotically flat, is more closely considered. It converges to Kerr for a vanishing scalar charge, but fails to converge to the Fisher-Janis-Newman-Winicour solution for a vanishing "rotation parameter". This solution exhibits a naked singularity having a ringlike structure.
description: Submitted paper
Lattice Instability in the Spin-Ladder System under Magnetic Field
Creators: name: Nagaosa, Naoto
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study theoretically the lattice instability in the spin gap systems under magnetic field. With the magnetic field larger than a critical value h_{c1}, the spin gap is collapsed and the magnetization arises. We found that the lattice distortion occurs in the spin-ladder at an incommensurate wavevector corresponding to the magnetization, while it does not occur in the Haldane system. At low temperatures the magnetization curve shows a first order phase transition with this lattice distortion.
description: 10 pages, REVTEX, 2 figures(ps file), minor changes
High-resolution observations of gas and dust around Mira using ALMA and SPHERE/ZIMPOL
Creators: name: Khouri, T.
name: Vlemmings, W. H. T.
name: Olofsson, H.
name: Ginski, C.
name: De Beck, E.
name: Maercker, M.
name: Ramstedt, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The outflows of oxygen-rich asymptotic giant branch (AGB) stars are thought to be driven by radiation pressure by photon scattering on grains with sizes of tenths of microns. The details of the formation of dust in the extended atmospheres of these stars and the mass-loss process is still not well understood. We obtained quasi-simultaneous observations of the AGB star Mira using ALMA and ZIMPOL to probe the distribution of gas and large dust grains, respectively. The polarized light images show dust around Mira~A, the companion (Mira~B) and in a trail that connects the two sources. ALMA reveals that dust around Mira~A is contained in a high-gas-density region with a significant fraction of the polarized light arising from its edge. We constrained the gas density, temperature, and velocity within a few stellar radii from the star by modelling the CO $v=1, J=3-2$ line. We find a mass $(\sim 3.8 \pm 1.3) \times 10^{-4}~M_\odot$ to be contained between the stellar millimetre photosphere, $R^{\rm 338~GHz}_\star$, and $4~R^{\rm 338~GHz}_\star$. Our best-fit models with lower masses also reproduce the $^{13}$CO $v=0, J=3-2$ line emission from this region. We find TiO$_2$ and AlO abundances corresponding to 4.5% and $< 0.1$% of the total titanium and aluminium expected for a solar-composition gas. The low abundance of AlO allows for efficient Al depletion into dust already very close to the star, as expected from thermal dust emission observations and theoretical calculations of Mira variables. We constrain the presence of aluminium oxide grains based on the scattered light observations and our gas-phase model. We find that aluminium oxide grains can account for a significant fraction of the total aluminium atoms in this region only if the grains have sizes $\lesssim 0.02~μ$m. This is an order of magnitude smaller than the maximum sizes predicted by dust-formation and wind-driving models.
description: 16 pages, 10 figures
Brane World Cosmology - Gauge-Invariant Formalism for Perturbation
Creators: name: Kodama, Hideo
name: Ishibashi, Akihiro
name: Seto, Osamu
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the present paper the gauge-invariant formalism is developed for perturbations of the brane-world model in which our universe is realized as a boundary of a higher-dimensional spacetime. For the background model in which the bulk spacetime is $(n+m)$-dimensional and has the spatial symmetry corresponding to the isometry group of a $n$-dimensional maximally symmetric space, gauge-invariant equations are derived for perturbations of the bulk spacetime. Further for the case corresponding to the brane-world model in which $m=2$ and the brane is a boundary invariant under the spatial symmetry in the unperturbed background, relations between the gauge-invariant variables describing the bulk perturbations and those for brane perturbations are derived from Israel's junction condition under the assumption of $\ZR_2$ symmetry. In particular, for the case in which the bulk spacetime is a constant-curvature spacetime, it is shown that the bulk perturbation equations reduce to a single hyperbolic master equation for a master variable, and that the physical condition on the gauge-invariant variable describing the intrinsic stress perturbation of the brane yield a boundary condition for the master equation through the junction condition. On the basis of this formalism it is pointed out that it seems to be difficult to suppress brane perturbations corresponding to massive excitations for a brane motion giving a realistic expanding universe model.
description: 25 pages, no figures, typos corrected, to appear in Phys.Rev.D
Reflectionless tunneling in planar Nb/GaAs hybrid junctions
Creators: name: Giazotto, Francesco
name: Cecchini, Marco
name: Pingue, Pasqualantonio
name: Beltram, Fabio
name: Lazzarino, Marco
name: Orani, Daniela
name: Rubini, Silvia
name: Franciosi, Alfonso
Publisher: name: arXiv
Year: 2001
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Reflectionless-tunneling was observed in Nb/GaAs superconductor/semiconductor junctions fabricated through a two-step procedure. First, periodic $δ$-doped layers were grown by molecular beam epitaxy near the GaAs surface, followed by an As cap layer to protect the surface during {\it ex-situ} transfer. Second, Nb was deposited by dc-magnetron sputtering onto the GaAs(001) 2 $\times$ 4 surface {\it in-situ} after thermal desorption of the cap layer. The magnetotransport behavior of the resulting hybrid junctions was successfully analyzed within the random matrix theory of phase-coherent Andreev transport. The impact of junction morphology on reflectionless tunneling and the applicability of the fabrication technique to the realization of complex superconductor/semiconductor mesoscopic systems are discussed.
description: 10 pages, 3 figures, to be published in Appl. Phys. Lett
Exact Thermodynamics of the Double sinh-Gordon Theory in 1+1-Dimensions
Creators: name: Khare, Avinash
name: Habib, Salman
name: Saxena, Avadh
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We study the classical thermodynamics of a 1+1-dimensional double-well sinh-Gordon theory. Remarkably, the Schrodinger-like equation resulting from the transfer integral method is quasi-exactly solvable at several temperatures. This allows exact calculation of the partition function and some correlation functions above and below the short-range order (``kink'') transition, in striking agreement with high resolution Langevin simulations. Interesting connections with the Landau-Ginzburg and double sine-Gordon models are also established.
description: 4 pages, 3 figures (embedded using epsf), uses RevTeX plus macro (included). Minor revision to match journal version, Phys. Rev. Lett. (in press)
Additional file 1 of Mechanistic insights into the inhibitory effect of theaflavins on virulence factors production in Streptococcus mutans
Creators: name: Kong, Junhao
name: Xia, Kai
name: Su, Xiaoqin
name: Zheng, Xuan
name: Diao, Chunhua
name: Yang, Xiufang
name: Zuo, Xiaobo
name: Xu, Jun
name: Liang, Xinle
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Table S1. Detailed information of DEGs involved in cell envelope elements. Table S2. Detailed information of DEGs involved in glycolysis. Table S3. Detailed information of DEGs involved in protein homeostasis and amino acid metabolism. Table S4. Detailed information of DEGs involved in DNA replication, repair, recombination, and oxidative stress response.
Two-dimensional fluctuations at the quantum-critical point of CeCu_{6-x}Au_x
Creators: name: Stockert, O.
name: Löhneysen, H. v.
name: Rosch, A.
name: Pyka, N.
name: Loewenhaupt, M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The heavy-fermion system CeCu_{6-x}Au_x exhibits a quantum critical point at x_c = 0.1 separating nonmagnetic and magnetically ordered ground states. The pronounced non-Fermi-liquid behavior at x_c calls for a search for the relevant quantum critical fluctuations. Systematic measurements of the inelastic neutron scattering cross section S(q,omega) for x = 0.1 reveal rod-like features in the reciprocal ac plane translating to two-dimensional (2d) fluctuations in real space. We find 3d magnetic ordering peaks for x = 0.2 and 0.3 located on these rods which hence can be viewed as 2d precursors of the 3d order.
description: 4 pages, 4 eps figures included
Covariant symplectic structure of the complex Monge-Ampère equation
Creators: name: Nutku, Y.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The complex Monge-Ampère equation admits covariant bi-symplectic structure for complex dimension 3, or higher. The first symplectic 2-form is obtained from a new variational formulation of complex Monge- Ampère equation in the framework of the covariant Witten-Zuckerman approach to symplectic structure. We base our considerations on a reformulation of the Witten-Zuckerman theory in terms of holomorphic differential forms. The first closed and conserved Witten-Zuckerman symplectic 2-form for the complex Monge-Ampère equation is obtained in arbitrary dimension and for all cases elliptic, hyperbolic and homogeneous. The connection of the complex Monge-Ampère equation with Ricci-flat Kähler geometry suggests the use of the Hilbert action. However, we point out that Hilbert's Lagrangian is a divergence for Kähler metrics. Nevertheless, using the surface terms in the Hilbert Lagrangian we obtain the second Witten-Zuckerman symplectic 2-form for complex dimension>2.
description: Physics Letters A 268 (2000) 293
title: Ανάπτυξη αυτόνομου υπό κλίμακα προτύπου SES με νόμο ελέγχου βασισμένο σε ανατροφοδότηση σήματος εικόνας
titleType: AlternativeTitle
Creators: name: Kouvaras, Nikolaos G.
Publisher: name: National Technological University of Athens
Year: 2009
Subjects: Αισθητήρες
Ενεργοποιητές
Μικροελεγκτές
Μοντελοποίηση
Ταυτοποίηση
Sensors
Actuators
Microcontrollers
Modelling
Identification

description: 152 σ.
description: Μελέτη συστήματος το οποίο βασίζεται στον δυναμικό εντοπισμό και έλεγχο της πορείας και θέσης σκάφους μέσω της ανάπτυξης ενός συστήματος παρακολούθησης φωτεινού στόχου που βρίσκεται στην ακτή ή σε άλλο προπορευόμενο σκάφος. Κατά συνέπεια, προτείνεται μια εικονική, οπτική γραμμή ρυμούλκησης του πλοίου, η οποία θα αντικαθιστά την υλική γραμμή ρυμούλκησης με καλώδιο.
description: Study of system which is based on the dynamic tracking and control of heading and placing of a ship via the development of a system of beacon tracking that is found in the coast or in an other being ahead ship. Accordingly, is proposed a virtual, optical line of ship’s towage, which will replace the material line of cabled towage
Active Suppression of Microphonics Detuning in high $Q_L$ Cavities
Creators: name: Banerjee, Nilanjan
name: Hoffstaetter, Georg
name: Liepe, Matthias
name: Quigley, Peter
name: Zhou, Zeyu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Operation of Superconducting Radio Frequency (SRF) cavities with high loaded quality factors is becoming increasingly preferred for applications which involve low beam loading including Energy Recovery Linacs (ERL). Vibration induced microphonics detuning poses a major operational bottleneck in these low bandwidth systems, adversely affecting field stability. Besides passive measures of mitigating the vibration sources, modern SRF cavities are also attached to fast tuners incorporating piezo-electric actuators. We demonstrate the narrow band active noise control algorithm for realizing active resonance control and propose a modification based on the Least Mean Square approach to adaptively tune the control parameters and study it's stability and performance. We discuss our experience of using passive mitigation techniques while commissioning the Main Linac Cryomodule of the Cornell-BNL ERL Test Accelerator (CBETA) and report a net reduction in peak detuning by more than a factor of 2 in its unstiffened cavities. Finally, we demonstrate stable performance of our resonance control system with consistent reduction of peak microphonics detuning by almost a factor of 2 on multiple cavities.
description: 16 pages, 17 figures. Submitted to Physical Review Accelerators and Beams
V2 beyond borders
Creators: name: Ledgeway, Adam
Publisher: name: Journal of Historical Syntax
Year: 2021

description: While the V2 status of medieval Romance and old French in particular is widely supported by detailed empirical and statistical studies, there are still some dissenting voices, such that the introduction and detailed scrutiny of new data, especially involving a range of more diverse textual sources, is a welcome addition in that it can provide important confirmatory evidence in favour of the V2 hypothesis. The present article therefore undertakes a detailed examination of the word order of a non-canonical old French prose text, the Histoire Ancienne jusqu’à César (henceforth HA), of particular interest since its earliest manuscript witnesses were produced outside of France providing us with a precious example of a supralocal use of French. Within this context, the study of word order and, in particular, the evidence for a V2 constraint in the HA offers us a discrete scientifically-controllable variable by which to measure the extent of structural unity across those mutually intelligible medieval koinés, of which the language of the HA is but one example, albeit from outside of France. An examination of the word order of the HA, in itself an original result, is shown to follow a V2 syntax, thereby underlining the salience of this structural constraint as a distinctive and stable feature of the grammars of medieval French texts produced both inside and outside of France. At the same time, this strengthens, in turn, claims for the existence of a common medieval Romance syntax characterized by a shared structural norm in the form of the V2 constraint, arguably the common denominator and hallmark of all medieval Romance grammars.
description: Journal of Historical Syntax, Vol 5 No 29 (2021): Part of the Special Collection "Secrets of Success"
Monitoring Single Scattering Events in Single Quantum Dots
Creators: name: Hohenester, Ulrich
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum-jump approach is used for a theoretical description of resonance luminescence from a {\em single} semiconductor quantum dot in contact with its solid-state environment. For continuous excitation of the single-exciton groundstate the luminescence exhibits bright periods, where photons are spontaneously emitted from the exciton decay, which are interrupted by dark periods when one electron or hole suffers a spin flip. It is shown that continuously monitored resonance luminescence provides a very sensitive measure of such rare single scattering events in quantum dots.
description: 4 pages; 3 figures
Improving protection effects of eucalyptol via carboxymethyl chitosan-coated lipid nanoparticles on hyperglycaemia-induced vascular endothelial injury in rats
Creators: name: Peng, Jianqing
name: Jiang, Zhaohui
name: Wu, Guoping
name: Cai, Zimin
name: Du, Qianming
name: Tao, Ling
name: Zhang, Yanyan
name: Chen, Yi
name: Shen, Xiangchun
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified

description: Hyperglycaemia is responsible for the major pathophysiological factor of diabetes-associated vascular endothelial injury, which mainly resulted from the disturbance of equilibrium between ROS generation and elimination. Eucalyptol was verified with exact anti-oxidation effects via stimulating the secretion of endogenous antioxidant enzymes against ROS. However, the volatility, instability and poor water solubility of eucalyptol limited its pharmacological activities in vivo. In this study, we developed carboxymethyl chitosan-coated lipid nanoparticles for eucalyptol (CMC/ELN) to facilitate oral administration. A thin lipid film dispersion method was used to prepare the ELN. After CMC coating, the diameter of ELN increased from 166 nm to 177 nm and charge reversal was observed. The nanocarrier enhanced the protective effects of eucalyptol both in the high level of glucose (HG)-damaged HUVECs and endothelial injury in type I diabetes mellitus (T1DM) rat model. Furthermore, the mechanism of eucalyptol on the promotion of Nrf2 and HO-1 and reduction on Keap1 expression have been verified both in the in vitro and in vivo model. Besides, the pharmacokinetics data were verified the promotion of the oral eucalyptol absorption by the nanocarrier. Taken together, we established an optimal oral delivery system that promoted oral administration of eucalyptol to exert protective effects on hyperglycaemia-induced vascular endothelial injury.
Inelastic neutron scattering as a confirmation of a new type of gapped surface excitations in liquid helium
Creators: name: Grigoriev, P. D.
name: Grigoriev, A. D.
name: Dyugaev, A. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the experimental data on inelastic neutron scattering by a thin ~5-atomic-layer film of liquid helium at three different temperatures: T=0.4K, 0.98K and 1.3K. These data were partially published previously, but here we present them in a better quality and at various temperatures. The neutron scattering intensity plots, in addition to the previously know dispersion of phonons and ripplons, suggest a branch of gapped surface excitations with activation energy $\sim 4.5$K and the dispersion similar to that expected for surfons - the bound quantum states of helium atoms above liquid helium surface, proposed and investigated theoretically. These data, probably, provide the first direct experimental confirmation of surfons. Before these surface excitations received only indirect experimental substantiation, based on the temperature dependence of surface tension coefficient and on their interaction with surface electrons. The existence of surfons as an additional type of surface excitations, although being debated yet, is very important for various physical properties of He surface. We also analyze previous numerical results on excitations in liquid helium and argue that surface excitations similar to surfons have been previously obtained by numerical calculations and called resonance interface states.
description: 6 pages, to be published in JETP 128, 1 (2019) [ZhETF volume 155, issue 1, p. 1-8 (2019)]
Additional file 3 of First complete genome sequence of infectious laryngotracheitis virus
Creators: name: Lee, Sang-Won
name: Markham, Philip F
name: Markham, John F
name: Petermann, Ivonne
name: Noormohammadi, Amir H
name: Browning, Glenn F
name: Ficorilli, Nino P
name: Hartley, Carol A
name: Devlin, Joanne M
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Authors’ original file for figure 1
Upgrade of a low-temperature scanning tunneling microscope for electron-spin resonance
Creators: name: Natterer, Fabian D.
name: Patthey, François
name: Bilgeri, Tobias
name: Forrester, Patrick R.
name: Weiss, Nicolas
name: Brune, Harald
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron spin resonance with a scanning tunneling microscope (ESR-STM) combines the high energy resolution of spin resonance spectroscopy with the atomic scale control and spatial resolution of STM. Here we describe the upgrade of a helium-3 STM with a 2D vector-field magnet ($B_z$ = 8.0 T, $B_x$ = 0.8 T) to an ESR-STM. The system is capable of delivering RF power to the tunnel junction at frequencies up to 30 GHz. We demonstrate magnetic field sweep ESR for the model system TiH/MgO/Ag(100) and find a magnetic moment of $(1.004 \pm 0.001)$ $μ_B$. Our upgrade enables to toggle between a DC mode, where the STM is operated with the regular control electronics, and an ultrafast-pulsed mode that uses an arbitrary waveform generator for pump-probe spectroscopy or reading of spin-states. Both modes allow for simultaneous radiofrequency excitation, which we add via a resistive pick-off tee to the bias voltage path. The RF cabling from room temperature to the 350 mK stage has an average attenuation of 18 dB between 5 and 25 GHz. The cable segment between the 350 mK stage and the STM tip presently attenuates an additional $34_{-3}^{+5}$ dB from 10 to 26 GHz and $38_{-2}^{+3}$ dB between 20 and 30 GHz. We discuss our transmission losses and indicate ways to reduce this attenuation. We finally demonstrate how to synchronize the arrival times of RF and DC pulses coming from different paths to the STM junction, a prerequisite for future pulsed ESR experiments.
description: 7 figures
Trotonotus bettoni Butler 1898
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Notodontidae
Trotonotus
Trotonotus bettoni

description: Trotonotus bettoni Butler, 1898
COMMON NAME(S): Betton’s Prominent.
SYNONYM(S): Prionocentrum oneili Janse, 1920.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Democratic Republic of Congo, Kenya, Malawi, Mozambique, South Africa, Tanzania, Zambia, Zimbabwe.
LOCALITY IN ZAMBIA: East Luangwa district, in Eastern Province; Kafue, in Lusaka Province.
LARVAL HOSTPLANT(S): One Fabaceae species (Julbernardia globiflora (Benth.) Troupin) and another but unidentified Fabaceae species (Brachystegia sp.) are reported as host plants of this taxon (Pinhey 1975).
SOURCES: African Moths 2019; De Prins & De Prins 2022; Pinhey 1975.
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on page 266, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
Disclination in Lorentz Space-Time
Creators: name: Li, Sheng
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The disclination in Lorentz space-time is studied in detail by means of topological properties of $ϕ$-mapping. It is found the space-time disclination can be described in term of a Dirac spinor. The size of the disclination, which is proved to be the difference of two sets of su(2)% -like monopoles expressed by two mixed spinors, is quantized topologically in terms of topological invariants$-$winding number. The projection of space-time disclination density along an antisymmetric tensor field is characterized by Brouwer degree and Hopf index.
description: Revtex, 7 pages
A scalable hardware and software control apparatus for experiments with hybrid quantum systems
Creators: name: Perego, Elia
name: Pomponio, Marco
name: Detti, Amelia
name: Duca, Lucia
name: Sias, Carlo
name: Calosso, Claudio E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Modern experiments with fundamental quantum systems - like ultracold atoms, trapped ions, single photons - are managed by a control system formed by a number of input/output electronic channels governed by a computer. In hybrid quantum systems, where two or more quantum systems are combined and made to interact, establishing an efficient control system is particularly challenging due to the higher complexity, especially when each single quantum system is characterized by a different timescale. Here we present a new control apparatus specifically designed to efficiently manage hybrid quantum systems. The apparatus is formed by a network of fast communicating Field Programmable Gate Arrays (FPGAs), the action of which is administrated by a software. Both hardware and software share the same tree-like structure, which ensures a full scalability of the control apparatus. In the hardware, a master board acts on a number of slave boards, each of which is equipped with an FPGA that locally drives analog and digital input/output channels and radiofrequency (RF) outputs up to 400 MHz. The software is designed to be a general platform for managing both commercial and home-made instruments in a user-friendly and intuitive Graphical User Interface (GUI). The architecture ensures that complex control protocols can be carried out, such as performing of concurrent commands loops by acting on different channels, the generation of multi-variable error functions and the implementation of self-optimization procedures. Although designed for managing experiments with hybrid quantum systems, in particular with atom-ion mixtures, this control apparatus can in principle be used in any experiment in atomic, molecular, and optical physics.
description: 10 pages, 12 figures
Additional file 4 of First complete genome sequence of infectious laryngotracheitis virus
Creators: name: Lee, Sang-Won
name: Markham, Philip F
name: Markham, John F
name: Petermann, Ivonne
name: Noormohammadi, Amir H
name: Browning, Glenn F
name: Ficorilli, Nino P
name: Hartley, Carol A
name: Devlin, Joanne M
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Authors’ original file for figure 2
Depinning of a domain wall in the 2d random-field Ising model
Creators: name: Drossel, Barbara
name: Dahmen, Karin
Publisher: name: arXiv
Year: 1998
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We report studies of the behaviour of a single driven domain wall in the 2-dimensional non-equilibrium zero temperature random-field Ising model, closely above the depinning threshold. It is found that even for very weak disorder, the domain wall moves through the system in percolative fashion. At depinning, the fraction of spins that are flipped by the proceeding avalanche vanishes with the same exponent beta=5/36 as the infinite percolation cluster in percolation theory. With decreasing disorder strength, however, the size of the critical region decreases. Our numerical simulation data appear to reflect a crossover behaviour to an exponent beta'=0 at zero disorder strength. The conclusions of this paper strongly rely on analytical arguments. A scaling theory in terms of the disorder strength and the magnetic field is presented that gives the values of all critical exponent except for one, the value of which is estimated from scaling arguments.
description: 13 pages Revtex, 13 eps figures
Adsorbate-enhanced field-emission from single-walled carbon nanotubes: a comparative first-principles study
Creators: name: Rahman, Ehsanur
name: Nojeh, Alireza
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We report a comparative ab-initio study of different types of adsorbates and their adsorption mechanism on the field-emission performance of single-walled carbon nanotubes by analyzing electrical properties and transport characteristics and considering the thermal stability of the adsorbed structure. Adsorbates were found to reduce the work function by up to 1.3 eV, enhance tunneling near the carbon nanotube tip, and increase the field-emission current by as much as two orders of magnitude. A significant localization of the electron cloud was also observed near the adsorbates under a high applied electric field .
description: 10 pages, 5 figure
Supplementary document for Characterization of Deep Sub-wavelength Nanowells by Imaging the Photon State Scattering Spectra - 4990502.pdf
Creators: name: Liu, Weiping
name: Xiong, Jichuan
name: Zhu, Libo
name: Ye, Shengwei
name: Zhao, Hanwen
name: Liu, Juan
name: Zhang, Heng
name: Hou, Lianping
name: Marsh, John
name: Dong, Lei
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Uncategorized

description: Supplementary materials
Cosmological dynamics on the brane
Creators: name: Maartens, Roy
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In Randall-Sundrum-type brane-world cosmologies, the dynamical equations on the three-brane differ from the general relativity equations by terms that carry the effects of imbedding and of the free gravitational field in the five-dimensional bulk. We derive the covariant nonlinear dynamical equations for the gravitational and matter fields on the brane, and then linearize to find the perturbation equations on the brane. The local energy-momentum corrections are significant only at very high energies. The imprint on the brane of the nonlocal gravitational field in the bulk is more subtle, and we provide a careful decomposition of this effect into nonlocal energy density, flux and anisotropic stress. The nonlocal energy density determines the tidal acceleration in the off-brane direction, and can oppose singularity formation via the generalized Raychaudhuri equation. Unlike the nonlocal energy density and flux, the nonlocal anisotropic stress is not determined by an evolution equation on the brane. In particular, isotropy of the cosmic microwave background may no longer guarantee a Friedmann geometry. Adiabatic density perturbations are coupled to perturbations in the nonlocal bulk field, and in general the system is not closed on the brane. But on super-Hubble scales, density perturbations can be evaluated by brane observers. Tensor perturbations on the brane are suppressed by local bulk effects during inflation, while the nonlocal effects can serve as a source or a sink. Vorticity on the brane decays as in general relativity, but nonlocal bulk effects can source the gravito-magnetic field, so that vector perturbations can be generated in the absence of vorticity.
description: Small changes, highlighting main result (superhorizon density perturbations can be evaluated intrinsically by brane observers). Matches version to appear in Phys. Rev. D
Disorder and superconductivity : a new phase of bi-particle localized states
Creators: name: Srinivasan, Bhargavi
name: Shepelyansky, Dima L.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We study the two-dimensional, disordered, attractive Hubbard model by the projector quantum Monte Carlo method and Bogoliubov - de Gennes mean-field theory. Our results for the ground state show the appearance of a new phase with charge localization in the metallic regime of the non-interacting model. Contrary to the common lore, we demonstrate that mean-field theory fails to predict this phase and is unable to describe the correct physical picture in this regime.
description: revtex, 4 pages, 3 figures
JFR - Journal of Family Research, Vol 30 No 3 (2018)
Creators: name: JFR-Journal Of Family Research
Publisher: name: JFR - Journal of Family Research
Year: 2018

description: Editorial...p. 232 30 Jahre Zeitschrift für Familienforschung/Journal of Family Research – ein Rückblick...p. 233-246 Salmon migration and fertility in East Germany – An analysis of birth dynamics around German reunification...p. 247-268 Too much or too little work? Couples’ actual and preferred employment patterns and work hours mismatches in Europe...p. 269-292 Simply the Best!? – Kulturelle Einflussfaktoren zum „intensive mothering“ bei Müttern von Kleinkindern in Deutschland...p. 293-315 Do relationship transitions affect body weight? Evidence from German longitudinal data...p. 316-338 How do family relations influence interethnic partner choices? The role of cohesion, affection and diversity in native and migrant families...p. 339-351
Split Grothendieck rings of rooted trees and skew shapes via monoid representations
Creators: name: Beers, David
name: Szczesny, Matt
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We study commutative ring structures on the integral span of rooted trees and $n$-dimensional skew shapes. The multiplication in these rings arises from the smash product operation on monoid representations in pointed sets. We interpret these as Grothendieck rings of indecomposable monoid representations over $\fun$ - the "field" of one element. We also study the base-change homomorphism from $\mt$-modules to $k[t]$-modules for a field $k$ containing all roots of unity, and interpret the result in terms of Jordan decompositions of adjacency matrices of certain graphs.
description: arXiv admin note: text overlap with arXiv:1706.03900
Cluster spin-glass behaviour and memory effect in Cr$_{0.5}$Fe$_{0.5}$Ga
Creators: name: Bag, Pallab
name: Baral, P. R.
name: Nath, R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the structural, static, and dynamic properties of Cr$_{0.5}$Fe$_{0.5}$Ga by means of powder x-ray diffraction, magnetization, heat capacity, magnetic relaxation, and magnetic memory effect measurements. DC magnetization and AC susceptibility studies reveal a spin-glass transition at around $T_{\rm f} \simeq 22$~K. An intermediate value of the relative shift in freezing temperature $δT_{\rm f} \simeq 0.017$, obtained from the AC susceptibility data reflects the formation of cluster spin-glass states. The frequency dependence of $T_{\rm f}$ is also analyzed within the framework of dynamic scaling laws. The analysis using power law yields a time constant for a single spin flip $τ* \simeq 1.1\times10^{-10}$~s and critical exponent $zν^{\prime}=4.2\pm0.2$. On the other hand, the Vogel-Fulcher (VF) law yields the time constant for a single spin flip $τ_0 \simeq 6.6\times10^{-9}$~s, VF temperature $T_{\rm 0}=21.1\pm0.1$~K, and an activation energy $E_{\rm a}/k_{\rm B} \simeq 16$~K. The value of $τ*$ and $τ_0$ along with a non-zero value of $T_{\rm 0}$ provide further evidence for the cluster spin-glass behaviour. The magnetic field dependent $T_{\rm f}$ follows the de Almeida-Thouless line with a non-mean-field type instability, reflecting either a different universality class or strong anisotropy in the spin system. A detailed non-equilibrium dynamics study via relaxation and memory effect experiments demonstrates striking memory effects. All the above observations render a cluster spin-glass behaviour which is triggered by magnetic frustration due to competing antiferromagnetic and ferromagnetic interactions and magnetic site disorder. Moreover, the asymmetric response of magnetic relaxation with respect to the change in temperature, below $T_{\rm f}$ can be explained by the hierarchical model.
description: Phys. Rev. B (Accepted, 2018) 11 pages, 10 figures, 1 table
Ancylosis niveicostella Hampson 1896
Creators: name: Singh, Navneet
name: Ranjan, Rahul
name: Talukdar, Avishek
name: Joshi, Rahul
name: Kirti, Jagbir Singh
name: Chandra, Kailash
name: Mally, Richard
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Pyralidae
Ancylosis
Ancylosis niveicostella

description: 130. Ancylosis niveicostella Hampson, 1896b: 72
Type locality: Bombay [Mumbai]. Ceylon [Sri Lanka]
Distribution. Indian records: Bombay (Hampson 1896b), Deesa (Hampson 1903a). Global records: Ceylon (Hampson 1896b).
description: Published as part of Singh, Navneet, Ranjan, Rahul, Talukdar, Avishek, Joshi, Rahul, Kirti, Jagbir Singh, Chandra, Kailash & Mally, Richard, 2022, A catalogue of Indian Pyraloidea (Lepidoptera), pp. 1-423 in Zootaxa 5197 (1) on page 70, DOI: 10.11646/zootaxa.5197.1.1, http://zenodo.org/record/7252292
D-Optimal Design for the Rasch Counts Model with Multiple Binary Predictors
Creators: name: Graßhoff, Ulrike
name: Holling, Heinz
name: Schwabe, Rainer
Publisher: name: arXiv
Year: 2018
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62K05, 62P15, 62J12

description: In this paper, we derive optimal designs for the Rasch Poisson counts model and the Rasch Poisson-Gamma counts model incorporating several binary predictors for the difficulty parameter. To efficiently estimate the regression coefficients of the predictors, locally D-optimal designs are developed. After an introduction to the Rasch Poisson counts model and the Rasch Poisson-Gamma counts model we will specify these models as a particular generalized linear mixed model. Based on this embedding optimal designs for both models including several binary explanatory variables will be presented. Therefore, we will derive conditions on the effect sizes of certain designs to be locally D-optimal. Finally, it is pointed out that the results derived for the Rasch Poisson models can be applied for more general Poisson regression models which should receive more attention in future psychological research.
Thermonuclear fusion rates for tritium + deuterium using Bayesian methods
Creators: name: de Souza, Rafael S.
name: Boston, S. Reece
name: Coc, Alain
name: Iliadis, Christian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Nuclear Experiment (nucl-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The $^3$H(d,n)$^4$He reaction has a large low-energy cross section and will likely be utilized in future commercial fusion reactors. This reaction also takes place during big bang nucleosynthesis. Studies of both scenarios require accurate and precise fusion rates. To this end, we implement a one-level, two-channel R-matrix approximation into a Bayesian model. Our main goals are to predict reliable astrophysical S-factors and to estimate R-matrix parameters using the Bayesian approach. All relevant parameters are sampled in our study, including the channel radii, boundary condition parameters, and data set normalization factors. In addition, we take uncertainties in both measured bombarding energies and S-factors rigorously into account. Thermonuclear rates and reactivities of the $^3$H(d,n)$^4$He reaction are derived by numerically integrating the Bayesian S-factor samples. The present reaction rate uncertainties at temperatures between $1.0$ MK and $1.0$ GK are in the range of 0.2% to 0.6%. Our reaction rates differ from previous results by 2.9% near 1.0 GK. Our reactivities are smaller than previous results, with a maximum deviation of 2.9% near a thermal energy of $4$ keV. The present rate or reactivity uncertainties are more reliable compared to previous studies that did not include the channel radii, boundary condition parameters, and data set normalization factors in the fitting. Finally, we investigate previous claims of electron screening effects in the published $^3$H(d,n)$^4$He data. No such effects are evident and only an upper limit for the electron screening potential can be obtained.
description: Phys. Rev. C, 2019, in press
Precursors of Mott insulator in modulated quantum wires
Creators: name: Odintsov, Arkadi A.
name: Tokura, Yasuhiro
name: Tarucha, Seigo
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the transport of interacting electrons through single-mode quantum wires whose parameters are periodically modulated on the scale of the electronic Fermi wave length. The Umklapp and backscattering of electrons can be described in terms of non-uniform quantum sine-Gordon-like models which also incorporate the effects of electronic reservoirs (electrodes) adiabatically coupled to the wire. We concentrate on weak Umklapp scattering and analyze the precursors of the Mott transition. At half-filling the temperature dependence of the extra resistance $ΔR = R - π\hbar/e^2$ of a modulated quantum wire of length $L$ changes from the interaction-dependent "bulk" power-law $ΔR \propto T^{4K_ρ-3}$ at high temperatures, $T \gg v_ρ/L$, to the universal $ΔR \propto T^2$ behavior at low temperatures, $T \ll v_ρ/L$. Away from half-filling the "bulk" results are qualitatively incorrect even at high temperatures $v_ρ/L \ll T \ll T^{*}$ despite the electron coherence in the wire is absent in this regime.
description: 8 pages, 2 Postscript figures