cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Super-exponential diffusion in nonlinear non-Hermitian systems
Creators: name: Zhao, Wen-Lei
name: Zhou, Longwen
name: Liu, Jie
name: Tong, Peiqing
name: Huang, Kaiqian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the quantum diffusion of a periodically kicked particle subjecting to both nonlinearity induced self-interactions and $\mathcal{PT}$-symmetric potentials. We find that, due to the interplay between the nonlinearity and non-Hermiticity, the expectation value of mean square of momentum scales with time in a super-exponential form $\langle p^2(t)\rangle\propto\exp[β\exp(αt)]$, which is faster than any known rates of quantum diffusion. In the $\mathcal{PT}$-symmetry-breaking phase, the intensity of a state increases exponentially with time, leading to the exponential growth of the interaction strength. The feedback of the intensity-dependent nonlinearity further turns the interaction energy into the kinetic energy, resulting in a super-exponential growth of the mean energy. These theoretical predictions are in good agreement with numerical simulations in a $\cal{PT}$-symmetric nonlinear kicked particle. Our discovery establishes a new mechanism of diffusion in interacting and dissipative quantum systems. Important implications and possible experimental observations are discussed.
description: 6 pages, 3 figures
General-relativistic instability in hylotropic supermassive stars
Creators: name: Haemmerlé, Lionel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The formation of supermassive black holes by direct collapse would imply the existence of supermassive stars (SMSs) and their collapse through the general-relativistic (GR) instability into massive black hole seeds. However, the final mass of SMSs is weakly constrained by existing models, in spite of the importance this quantity plays in the consistency of the direct collapse scenario. We estimate the final masses of spherical SMSs in the whole parameter space relevant for these objects. We build analytical stellar structures (hylotropes) that mimic existing numerical SMS models accounting for full stellar evolution with rapid accretion. From these hydrostatic structures, we determine ab initio the conditions for GR instability, and compare the results with the predictions of full stellar evolution. We show that hylotropic models predict the onset of GR instability with high precision. The mass of the convective core appears as a decisive quantity. The lower it is, the larger is the total mass required for GR instability. Typical conditions for GR instability are a total mass >10^5 Msun with a core mass >10^4 Msun. If the core mass remains below 10^4 Msun, total masses in excess of 10^6-10^7 Msun can be reached. Our results confirm that spherical SMSs forming in primordial, atomically cooled haloes collapse at masses below 500 000 Msun. On the other hand, accretion rates in excess of 1000 Msun/yr, leading to final stellar masses >10^6 Msun, are required for massive black hole formation in metal-rich gas. Thus, the different channels of direct collapse imply distinct final masses for the progenitor of the black hole seed.
Computational study of crystal defects formation in Mo by machine learned molecular dynamics simulations
Creators: name: Dominguez-Gutierrez, F. J.
name: Byggmästar, J.
name: Nordlund, K.
name: Djurabekova, F.
name: von Toussaint, U.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work, we study the damage in crystalline molybdenum material samples due to neutron bombardment in a primary knock-on atom range of 0.5-10 keV at room temperature. We perform machine learned molecular dynamics (MD) simulations with a previously developed interatomic potential based on the Gaussian Approximation Potential (GAP) framework. We utilize a recently developed software workflow for fingerprinting and visualizing defects in damage crystal structures to analyze the damaged Mo samples by computing the formation of point defects during and after a collision cascade. As a benchmark, we report results for the total number of Frenkel pairs (a self-interstitial atom and a single vacancy) formed and atom displacement as a function of the PKA energy. A comparison to results obtained by using an Embedded Atom Method (EAM) potential is presented to discuss the advantages and limits of the machine learned MD simulations. The formation of Frenkel pairs follows a sublinear scaling law related to the PKA energy with $E^{0.54}_\mathrm{PKA}$ to the GAP MD results and $E^{0.667}_\mathrm{PKA}$ for the EAM simulations. Although the average number total defects is similar for both methods, we notice that MD potentials model different atomic geometries for the complex point defects, where the formation of crowdions is more favorable for the GAP potential. Finally, ion beam mixing results for GAP MD simulations are reported and discussed.
How Real are Quantum States in $ψ$-ontic Models?
Creators: name: Hermens, Ronnie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There is a longstanding debate on the metaphysical relation between quantum states and the systems they describe. A series of relatively recent ψ-ontology theorems have been taken to show that, provided one accepts certain assumptions, "quantum states are real". In this paper I investigate the question of what that claim might be taken to mean in light of these theorems. It is argued that, even if one accepts the framework and assumptions employed by such theorems, such a conclusion is not warranted. Specifically, I argue that when a so-called ontic state is taken to describe the properties of a system, the relation between this state and some quantum state as established by ψ-ontology theorems, is not of the kind that would warrant counting the quantum state among these properties in any way.
Analysis Description Languages for the LHC
Creators: name: Sekmen, Sezen
name: Gras, Philippe
name: Gray, Lindsey
name: Krikler, Benjamin
name: Pivarski, Jim
name: Prosper, Harrison B.
name: Rizzi, Andrea
name: Unel, Gokhan
name: Watts, Gordon
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: An analysis description language is a domain specific language capable of describing the contents of an LHC analysis in a standard and unambiguous way, independent of any computing framework. It is designed for use by anyone with an interest in, and knowledge of, LHC physics, i.e., experimentalists, phenomenologists and other enthusiasts. Adopting analysis description languages would bring numerous benefits for the LHC experimental and phenomenological communities ranging from analysis preservation beyond the lifetimes of experiments or analysis software to facilitating the abstraction, design, visualization, validation, combination, reproduction, interpretation and overall communication of the analysis contents. Here, we introduce the analysis description language concept and summarize the current efforts ongoing to develop such languages and tools to use them in LHC analyses.
description: Accepted contribution to the proceedings of The 8th Annual Conference on Large Hadron Collider Physics, LHCP2020, 25-30 May, 2020, online
The engulfment of aqueous droplets on perfectly wetting oil layers
Creators: name: Cuttle, Callum
name: Thompson, Alice B.
name: Pihler-Puzović, Draga
name: Juel, Anne
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Place a droplet of mineral oil on water and the oil will spread to cover the water surface in a thin film -- a phenomenon familiar to many, owing to the rainbow-faced puddles left behind leaking buses on rainy days. In this paper we study the everted problem: an aqueous droplet deposited onto a deep layer of silicone oil. As it is energetically favourable for the oil phase to spread to cover the droplet surface completely, the droplet is ultimately engulfed in the oil layer. We present a detailed study of engulfment dynamics, from the instant the droplet first impacts the oil surface until it finally sediments into the less dense oil. We study a broad range of droplet sizes (micrometric to millimetric) and oil kinematic viscosities ($10^2$ to $10^5$ cSt), corresponding to a viscosity-dominated parameter regime with relevance to oil spills. Our investigation primarily examines droplet engulfment dynamics over two distinct stages: a rapid earlier stage in which the droplet is almost entirely submerged, driven by capillary forces in the oil surface, and cloaked by a thin layer of oil; and a much slower later stage in which gravity pulls on the drop adhered to the oil surface, thus driving a peeling flow. This means that gravitational effects are essential to complete the engulfmet of the droplet, even for micrometric droplets. We observe the longest engulfment times for droplets of intermediate size. Experiments at fixed droplet size reveal a power law dependence of engulfment time on oil kinematic viscosity.
description: 29 pages, 16 figures. Submitted to the Journal of Fluid Mechanics
Zarcosia ilonae Gompel 2020, n. sp.
Creators: name: Gompel, Nicolas
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Aderidae
Zarcosia
Zarcosia ilonae

description: Zarcosia ilonae n. sp. (Figures 1; 3c; 4g; 5k; 6b) Etymology. The species is named after my wife, Ilona Grunwald, to acknowledge her patience and support of my work with insects. Type locality. Thailand: Surat Thani Province, Phanom District, Tham Wararam, 08°52’ N 98°39’ E. Distribution. Thailand (Figure 1). Description. (Figure 3c). Female unknown. Body length. ♂ holotype: 2.55 mm. Slender, orange-brown with darker head, covered with very short, pulverulent, white pubescence. Appendages pale. Head. Moderately transverse, barely wider than pronotum. Palpi yellow, last article securiform. Finely and densely punctuated. Occiput lined with a fringe of dense and short white hairs posteriorly. Antennae. 1.5 times longer than elytra, entirely yellowish, filiform with antenommeres 3–10 elongated. Pronotum (Figure 6b). Convex, slightly longer than wide, sides regularly curved, wider, almost gibbose in its anterior third. Elytra. Length: 1.80 mm. Punctation strong and dense, with larger points. Space between points slightly wider than the points themselves. Disc subconvex. Pubescence dense and short, comprised of very short hairs borne from the points and interspersed pulverulent hairs. Legs. Particularly elongated. Foretibia weakly broadened in the middle of their inner side (Figure 5k). Aedeagus (Figure 4g). Sturdy, lightly pigmented, sides divergent from base in dorsal view, then largely rounded near apex and ending in a broad stinger. Nearly flat in lateral view, with no kink. Lateral appendages thick and as long as the apical stinger. Type material. Holotype (♂, MNHN). Thailand: Surat Thani Province, Phanom District, Tham Wararam, Cave, 08°52’ N 98°39’ E (250 m) (L. Deharveng and A. Bedos) 24.VII.1987. Note. The extremely thin and elongated appendages of species likely represent adaptations to life in caves.
description: Published as part of Gompel, Nicolas, 2020, Synopsis of the Asian species in the genus Zarcosia Collado & Alonso-Zarazaga 1996 with new combinations and descriptions of fourteen new species, pp. 151-178 in Zootaxa 4838 (2) on pages 161-162, DOI: 10.11646/zootaxa.4838.2.1, http://zenodo.org/record/4403783
HH 212: SMA Observations of a Remarkable Protostellar Jet
Creators: name: Lee, Chin-Fei
name: Ho, Paul T. P.
name: Beuther, Henrik
name: Bourke, Tyler L.
name: Hirano, Naomi
name: Shang, Hsien
name: Zhang, Qizhou
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: HH 212 is a nearby (460 pc) protostellar jet discovered in H$_2$ powered by a Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. It is highly collimated and symmetric with matched pairs of bow shocks on either side of the source. We have mapped it in 850 $μ$m continuum, SiO ($J=8-7$), CO ($J=3-2$), SO ($N_J=8_9-7_8$), HCO$^+$ ($J = 4-3$), and H$^{13}$CO$^+$ ($J = 4-3$) emission simultaneously at $\sim$ 1$''$ resolution with the Submillimeter Array (SMA). Thermal dust emission is seen in continuum around the source, mainly arising from an inner envelope (i.e., the inner part of a previously seen flattened envelope) and a possible disk. The inner envelope is also seen with rotation in CO, HCO$^+$, and probably SO. Like H$_2$ emission, CO and SiO emission are seen along the jet axis but extending closer to the source, tracing the bow shocks with a broad range of velocities and the continuous structures in between. SO emission is seen only around the source, forming a jetlike structure extending along the jet axis from the source, likely tracing the jet near the launching region. The jet is episodic and bending. It may also be slightly precessing as the jetlike SO structure shows a slight S-shaped symmetry about the source. A hint of jet rotation is also seen across the jet axis. Internal outflow shells are seen in CO and HCO$^+$, associated with the bow shocks in the inner part of the jet. The bases of the HCO$^+$ shells are seen with a hint of rotation similar to that seen in the inner envelope, probably consisted mainly of the material extended from the inner envelope and even the possible disk.
description: 18 pages, 12 figures, Accepted by the ApJ
Algorithms For Automatic Accentuation And Transcription Of Russian Texts In Speech Recognition Systems
Creators: name: Iakovenko, Olga
name: Bondarenko, Ivan
name: Borovikova, Mariya
name: Vodolazsky, Daniil
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper presents an overview of rule-based system for automatic accentuation and phonemic transcription of Russian texts for speech connected tasks, such as Automatic Speech Recognition (ASR). Two parts of the developed system, accentuation and transcription, use different approaches to achieve correct phonemic representations of input phrases. Accentuation is based on "Grammatical dictionary of the Russian language" of A.A. Zaliznyak and wiktionary corpus. To distinguish homographs, the accentuation system also utilises morphological information of the sentences based on Recurrent Neural Networks (RNN). Transcription algorithms apply the rules presented in the monograph of B.M. Lobanov and L.I. Tsirulnik "Computer Synthesis and Voice Cloning". The rules described in the present paper are implemented in an open-source module, which can be of use to any scientific study connected to ASR or Speech To Text (STT) tasks. Automatically marked up text annotations of the Russian Voxforge database were used as training data for an acoustic model in CMU Sphinx. The resulting acoustic model was evaluated on cross-validation, mean Word Accuracy being 71.2%. The developed toolkit is written in the Python language and is accessible on GitHub for any researcher interested.
description: Speech and Computer 20th International Conference, SPECOM 2018, Leipzig, Germany, Proceedings 20
Stellar scattering and the formation of exponential discs in self-gravitating systems
Creators: name: Wu, Jian
name: Struck, Curtis
name: D'Onghia, Elena
name: Elmegreen, Bruce G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We show, using the N-body code GADGET-2, that stellar scattering by massive clumps can produce exponential discs, and the effectiveness of the process depends on the mass of scattering centres, as well as the stability of the galactic disc. Heavy, dense scattering centres in a less stable disc generate an exponential profile quickly, with a timescale shorter than 1 Gyr. The profile evolution due to scattering can make a near-exponential disc under various initial stellar distributions. This result supports analytic theories that predict the scattering processes always favour the zero entropy gradient solution to the Jeans/Poisson equations, whose profile is a near-exponential. Profile changes are accompanied by disc thickening, and a power-law increase in stellar velocity dispersion in both vertical and radial directions is also observed through the evolution. Close encounters between stars and clumps can produce abrupt changes in stellar orbits and shift stars radially. These events can make trajectories more eccentric, but many leave eccentricities little changed. On average, orbital eccentricities of stars increase moderately with time.
description: 14 pages, 19 figures
Magnetic flux inversion in a peculiar changing look AGN
Creators: name: Scepi, Nicolas
name: Begelman, Mitchell C.
name: Dexter, Jason
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We argue that the changing-look event in the active galactic nucleus 1ES 1927+654, followed by a dip of 3 orders of magnitude in the X-ray luminosity, is controlled by a change in the accretion rate and an inversion of magnetic flux in a magnetically arrested disk (MAD). Before the changing-look event, strong magnetic flux on the black hole powers X-ray emission via the Blandford-Znajek process while the UV emission is produced by a radiatively inefficient magnetized disk. An advection event, bringing flux of the opposite polarity, propagates inward leading, first, to a rise in the UV/optical luminosity and, then, to a dip in the X-ray luminosity when it reaches the black hole. We estimate the timescale for magnetic flux advection and find that the observed timescale between the beginning of the changing-look event and the minimum in the X-ray luminosity, $\approx200$ days, is in agreement with the time needed to cancel the magnetic flux in a MAD extending to $\approx180\:r_g$. Although flux inversion events might be rare due to the large ratio of flux-to-mass that is needed, we argue that AGN showing an unusually high ratio of X-ray to UV luminosity are prime candidates for such events. We also suggest that similar events may lead to jet interruptions in radio-loud objects.
description: Submitted to MNRAS Letters. 5 pages, 1 Figure
Polypedilum (Polypedilum) parthenogeneticum Donato & Paggi 2008
Creators: name: Donato, Mariano
name: Baccaro, Lara
name: Siri, Augusto
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Polypedilum
Polypedilum parthenogeneticum

description: Polypedilum (Polypedilum) parthenogeneticum Donato & Paggi, 2008
(Fig. 1)
Polypedilum parthenogeneticum Donato and Paggi 2008: 52.
Polypedilum (Polypedilum) parthenogeneticum, new combination.
Material examined. ARGENTINA: 1 male with pupal exuviae, Corrientes, Riachuelo, 27.5452754 ° S, 58.7159499 ° W, 31.xii.2018, pipette phytotelmata in Eryngium L. (Apiaceae), L. Baccaro (ILPLA).
Male description
Total length 2.03 mm; wing length 1.5 mm. Total length/wing length 1.35. Wing length/length of profemur 1.97.
Head. AR 1.24. Ultimate flagellomere 128 long. Temporal setae 13. Clypeus with 22 setae. Tentorium 117 long; 27 wide. Length of palp segments: 29; 31; 68; 87; 126. Third palpomere with 3 lanceolate sensilla clavata in small pit; longest 19 long.
Thorax. Dorsocentrals 11, with 3 on humeral area; acrostichals 7; prealars 3; antepronotals 1. Scutellum with 8 setae.
Wing (Fig. 1A). VR 1.15. Brachiolum with 1 seta. R with 18; R 1 with 9; R 4+5 with 21; remaining veins bare. Squama with 3 setae. Lengths and proportions of legs in Table 1.
Legs. Scale of fore tibia: 45. Spur of middle tibia: 16 and 56; of hind tibia: 26 and 70. Width at apex of fore tibia 50; of middle tibia 49; of hind tibia 54. Lengths and proportions of legs in Table 1.
Hypopygium (Fig. 1B, C). Tergite IX with 14 medial setae. Phalapodeme length: 76. Transverse sternapodeme length: 49. Superior volsella 74 long, lateral seta lacking, basal portion of superior volsella with microtrichia and 4 inner setae. Inferior volsella slender 120 long, with 11 setae arranged in two rows. Gonocoxite length: 128. Gonostyle length: 159. HR= 0.81. HV= 1.28.
Remarks
The larva and pupa of this specimen fits in the original description, except that the branches of the thoracic horn present fine spinules in its tegument. This feature was corroborated also in the females previously described, and therefore the emendation of the pupal diagnosis of P. parthenogeneticum is established.
description: Published as part of Donato, Mariano, Baccaro, Lara & Siri, Augusto, 2019, Male description of the phytotelma-dwelling species Polypedilum parthenogeneticum (Chironomidae: Chironominae), pp. 68-72 in CHIRONOMUS Journal of Chironomidae Research 32 (32) on page 69, DOI: 10.5324/cjcr.v0i32.3301, http://zenodo.org/record/7995417
Convolutional Variational Autoencoders for Spectrogram Compression in Automatic Speech Recognition
Creators: name: Iakovenko, Olga
name: Bondarenko, Ivan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Sound (cs.SD)
subject: Computation and Language (cs.CL)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: For many Automatic Speech Recognition (ASR) tasks audio features as spectrograms show better results than Mel-frequency Cepstral Coefficients (MFCC), but in practice they are hard to use due to a complex dimensionality of a feature space. The following paper presents an alternative approach towards generating compressed spectrogram representation, based on Convolutional Variational Autoencoders (VAE). A Convolutional VAE model was trained on a subsample of the LibriSpeech dataset to reconstruct short fragments of audio spectrograms (25 ms) from a 13-dimensional embedding. The trained model for a 40-dimensional (300 ms) embedding was used to generate features for corpus of spoken commands on the GoogleSpeechCommands dataset. Using the generated features an ASR system was built and compared to the model with MFCC features.
description: Theory and Practice of Natural Computing 9th International Conference, TPNC 2020, Taoyuan, Taiwan, 2020, Proceedings 9
Inhomogeneity effects in oxygen doped HgBa$_2$CuO$_{4}$
Creators: name: Ambrosch-Draxl, C.
name: Sherman, E. Ya.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We theoretically investigate inhomogeneity effects on the charges, electric field gradients and site-projected densities of states in HgBa$_2$CuO$_{4+δ}$. We find pronounced differences in the doping-induced number of holes at different atomic sites. The contributions of these sites to the density of states in the vicinity of the Fermi level are peaked at the same energy, but vary in magnitude by up to 70 percent and have different energy dependence. Due to this energy dependence the role of the intrinsic inhomogeneities for superconductivity strongly depends on the energy and character of the quasiparticle mediating the Cooper pairing. Our results can explain the origin of doping-induced effects observed either by local or macroscopic experimental probes.
description: 5 pages, 2 figures
Quench dynamics of collective modes in fractional quantum Hall bilayers
Creators: name: Liu, Zhao
name: Balram, Ajit C.
name: Papić, Zlatko
name: Gromov, Andrey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce different types of quenches to probe the non-equilibrium dynamics and multiple collective modes of bilayer fractional quantum Hall states. We show that applying an electric field in one layer induces oscillations of a spin-1 degree of freedom, whose frequency matches the long-wavelength limit of the dipole mode. On the other hand, oscillations of the long-wavelength limit of the quadrupole mode, i.e., the spin-2 graviton, as well as the combination of two spin-1 states, can be activated by a sudden change of band mass anisotropy. We construct an effective field theory to describe the quench dynamics of these collective modes. In particular, we derive the dynamics for both the spin-2 and the spin-1 states and demonstrate their excellent agreement with numerics.
description: 7+8 pages, 12 figures
The effect of noise and syntactic complexity on listening comprehension
Creators: name: Dillon, Lisa Michelle
Publisher: name: University of British Columbia
Year: 2009

description: Twelve normal-hearing subjects (21 to 33 years of age) listened to sentences in the presence of an eight-talker babble background noise in three signal-to-noise (S:N) conditions: 0, -3, -6 dB S:N. Each sentence was one of nine different syntactic complexity types. Subjects were asked to perform an Object Manipulation Task (OMT) by acting out who did what to whom in the sentences by using toy animals. Each subject's manipulations were coded as correct or incorrect; the incorrect manipulations were subdivided into three error categories: syntactic violations, lexical substitutions, and omissions. The latency of each manipulation was measured. The present study investigated the effect of the S:N conditions and the syntactic complexity on accuracy of comprehension and latency of response. Also, the number and types of errors that occurred as S:N conditions became more adverse were examined. It was found that more complex sentences were not comprehended as accurately as less complex sentences and the more complex sentences took more time to act out. The pattern of the relative number of errors across sentence types were similar across S:N conditions, though fewer sentences were comprehended correctly in the -6 dB S:N condition. It was also found that, in general, syntactic-type errors increased as the S:N condition became more adverse. It was shown that similar errors were made in the present study as were made by aphasic patients (Caplan, Baker, and Dehaut, 1985) and by normal young subjects who were perceptually stressed with a visual presentation of sentences at an increased speed (Miyake, Carpenter, and Just, 1994). The results obtained in the present study were used to evaluate the idea that working memory capacity may limit a listener's ability to comprehend.
Solar-type Magnetic Reconnection Model for Magnetar Giant Flare
Creators: name: Masada, Youhei
name: Nagataki, Shigehiro
name: Shibata, Kazunari
name: Terasawa, Toshio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a theoretical model describing magnetar giant flares on the basis of solar flare/coronal mass ejection theory. In our model, a preflare activity plays a crucial role in driving evaporating flows and supplying baryonic matters into the magnetosphere. The loaded baryonic matter, that is called "prominence", is then gradually uplifted via crustal cracking with maintaining a quasi-force-free equilibrium of the magnetosphere. Finally the prominence is erupted by the magnetic pressure force due to the loss of equilibrium triggered by the explosive magnetic reconnection. The giant flare should be induced as a final outcome of the prominence eruption accompanied by large-scale field reconfigurations. An essential difference between solar and magnetar flares is the control process of their evolutionary dynamics. The flaring activity on magnetars is mainly controlled by the radiative process unlike the solar flare governed by the electron conduction. It is highly suggestive that our model is accountable for the physical properties of the extraordinary giant flare observed on 2004 December 27 from SGR1806-20, including the source of baryonic matters loaded in the expanding ejecta observed after the giant burst.
description: Accepted for Publications of the Astronomical Society of Japan (PASJ Vol.62 No.4), 21 pages, 4 figures
Effect on cosmic microwave background polarization of coupling of quintessence to pseudoscalar formed from the electromagnetic field and its dual
Creators: name: Liu, Guo-Chin
name: Lee, Seokcheon
name: Ng, Kin-Wang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the full set of power spectra of cosmic microwave background (CMB) temperature and polarization anisotropies due to the coupling between quintessence and pseudoscalar of electromagnetism. This coupling induces the rotation of the polarization plane of CMB photons, thus resulting in non-vanishing B mode and parity-violating TB and EB modes. Using the 2003 flight of BOOMERANG (B03) data, we give the most stringent constraint on the coupling strength. In some cases, the rotation-induced B mode can confuse the hunting for the gravitational lensing induced B mode.
description: 9 pages, 5 eps figures. references updated, version accepted by PRL
Unconventional and anomalous magnetic field distribution in a bilayer superconductor with geometric constraints
Creators: name: Yanagisawa, Takashi
Publisher: name: arXiv
Year: 2025
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the magnetic field distribution in multi-component superconductors. We examine a layered superconductor and a two-component one-layer superconductor. We evaluate the field distribution in the presence of a half-flux quantum vortex with a kink structure in the phase space of gap functions. We also examine the magnetic field distribution of a knot soliton which is formulated in a two-component superconductor. We investigate the effect of geometric constraints for multi-component superconductors, where the geometric constraint means that the system is compactified in one direction so that the current in this direction becomes vanishingly small. This corresponds to the gauge fixing in this direction. An unconventional magnetic field distribution takes place; here the unconventional means that the magnetic field is screened incompletely which would be called the anomalous Meissner effect. We argue that this anomalous behavior creates a massless gauge field.
description: 8 figures
Statistical equilibrium and ion cyclotron absorption/emission in strongly magnetized plasmas
Creators: name: Potekhin, A. Y.
name: Lai, Dong
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We calculate the transition rates between proton Landau levels due to non-radiative and radiative Coulomb collisions in an electron-proton plasma with strong magnetic field B. Both electron-proton collisions and proton-proton collisions are considered. The roles of the first-order cyclotron absorption and second-order free-free absorption and scattering in determining the line strength and shape as well as the continuum are analysed in detail. We solve the statistical balance equation for the populations of proton Landau levels. For temperatures \sim 10^6-10^7 K, the deviations of the proton populations from LTE are appreciable at density ρ< 0.1 B_{14}^{3.5} g cm^{-3}, where B_{14}=B/(10^{14} G). We present general formulae for the plasma emissivity and absorption coefficents under a wide range of physical conditions. Our results are useful for studying the possibility and the conditions of proton/ion cyclotron line formation in the near vicinity of highly magnetized neutron stars.
description: 17 pages, 8 figures, MNRAS, accepted
title: Once upon a time outside the West : rethinking the western in global contexts
Creators: name: Wessels, Chelsea
Publisher: name: University of St Andrews
publisherIdentifier: https://ror.org/02wn5qz54
publisherIdentifierScheme: ROR
Year: 2014

description: This project argues for rethinking the western as a global genre, rather than one rooted in a particular construction of the American West. First, by considering the western's global origins through an examination of early cinema, I challenge the singular connection to an American origin. Through tracing an alternative history of the genre in early cinema, we can see that the assumed connections between America and the western can be challenged by way of examples from France, Argentina, and Australia. Moving to the post-war and contemporary periods, this project highlights the popular and political uses of the genre by way of examples from Germany, Latin America, Spain and Italy, and Australia. These case studies identify how considering the western as a global popular genre allows it to address local political concerns across a range of national and transnational contexts. To situate the different contexts, this thesis relies on the broad theoretical framework of transculturation, following Mary Louise Pratt, to consider how the western 'selects' and 'invents' from particular historical, cultural, and political moments, often as part of asymmetrical power relations. Each case study also seeks to provide a theoretical framework specific to the local context, such as the theories and practices of Third Cinema in Latin America, in order to suggest ways of addressing the western outside of Hollywood. By shifting the western away from a central origin point, this thesis shows how the genre becomes meaningful on a global scale in terms of key issues of identity, political critique, and representations of space.
A supersymmetric matrix model: III. Hidden SUSY in statistical systems
Creators: name: Veneziano, G.
name: Wosiek, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Hamiltonian of a recently proposed supersymmetric matrix model has been shown to become block-diagonal in the large-N, infinite 't Hooft coupling limit. We show that (most of) these blocks can be mapped into seemingly non-supersymmetric $(1+1)$-dimensional statistical systems, thus implying non-trivial (and apparently yet-unknown) relations within their spectra. Furthermore, the ground states of XXZ-chains with an odd number of sites and asymmetry parameter $Δ= - 1/2$, objects of the much-discussed Razumov--Stroganov conjectures, turn out to be just the strong-coupling supersymmetric vacua of our matrix model.
description: 18 pages, note and references added at the end
Optical and Hidden Transport Properties of BaFe$_{1.91}$Ni$_{0.09}$As$_{2}$ Film
Creators: name: Aleshchenko, Yu. A.
name: Muratov, A. V.
name: Ummarino, G. A.
name: Richter, S.
name: Thomas, A. Anna
name: Hühne, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Optical spectroscopy was used to study the electrodynamics and hidden transport properties of a BaFe$_{1.91}$Ni$_{0.09}$As$_{2}$ thin superconducting film. We analyzed the normal state data using a Drude-Lorentz model with two Drude components: one narrow ($D_1$) and another broad one ($D_2$). In the superconducting state, two gaps with $2Δ_{0}^{(2)}/k_BT_c=1.9$--2.0 and $2Δ_{0}^{(1)}/k_BT_c=4.0$--4.3 are formed from the narrow component $D_1$ while the broad component $D_2$ remains ungapped. The calculated total DC resistivity of the film and the low-temperature scattering rate for the narrow Drude component show a hidden Fermi-liquid behavior. The change of total electron-boson coupling ($λ_{tot}$) and representative energy ($Ω_{0}$) in the normal state with respect to the superconducting state is typical of other iron-based materials as well as high-temperature superconducting (HTSC) cuprates.
Archival professionalism and ethics : An assessment of archival codes in North America
Creators: name: May, Trevor Ian
Publisher: name: University of British Columbia
Year: 2009

description: This thesis explores the subjects of professionalism and ethics as they relate to archivists and seeks to assess the appropriateness and effectiveness of the ethical codes adopted by two national archival associations in North America. The archival profession in North America is in its infancy compared to its status in Europe. Having been identified with serving scholarship and other "non-essential" pursuits, archivists have begun to involve themselves in more vital records management tasks involving access to information and privacy issues. As the archival profession strives to achieve greater public recognition and trust to better carry out these and other sensitive tasks, the need for a code of ethics has become more acute. Both the Society of American Archivists and the Association of Canadian Archivists have developed codes in the last few years in an attempt to set standards of conduct in the face of rising responsibilities. However, many of the elements have been borrowed from other codes and with the need to ensure that such codes will be observed by members and enforceable by sanction, it seems timely that some means be established for analyzing their effectiveness. This thesis attempts to establish the tools for analysis of archival codes of ethics. To this end, it examines professionalism and ethics and the relationship between them. It draws upon the literature on emergent professions, establishing some of the characteristics of recognized professions. It also draws upon the literature on professional ethics to determine how one might look at existing codes from an ethical perspective. It examines the nature of archives and archival work to identify ethical principles regarding archival material and its treatment. Ultimately, the elements of these foregoing discussions form the basis for analyzing archival codes of ethics. The thesis generally concludes that ethical codes must be placed in an ethical infrastructure which reinforces the values and principles embodied in a code of ethics. Moreover, a better understanding and consensus about the purpose or goals of the profession needs to be achieved and stated in the codes themselves. Greater attention needs to be paid to formulating basic principles which can be applied in unpredictable situations. Greater use of logical relationships between code components is also needed. Finally, to become truly useful, the North American codes need to be made more comprehensive and to this end, it is suggested that professional archival groups abandon their attempt to provide ethical guidance solely in encapsulated form.
การพัฒนารูปแบบการเรียนการสอนเพื่อส่งเสริมสมรรถนะนักศึกษาครูการศึกษาพิเศษ
Creators: name: สุภาวดี วิสุวรรณ
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: รูปแบบการเรียนการสอน, สมรรถนะครูการศึกษาพิเศษ (Instruction model, Special education teacher competency)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 153-166
ความสัมพันธ์เชิงสาเหตุขององค์ประกอบประสิทธิผลโรงพยาบาลส่งเสริมสุขภาพตำบล เขตสุขภาพที่ 8
Creators: name: พรศักดิ์ ฤาไกรศรี
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: องค์ประกอบ, ประสิทธิผลโรงพยาบาลส่งเสริมสุขภาพตำบล (The elements, The effectiveness hospital of sub-district health promotion hospital)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 167-178
Dynamics of O(N) Model in a Strong Magnetic Background Field as a Modified Noncommutative Field Theory
Creators: name: Salim, Amir Jafari
name: Sadooghi, Neda
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the presence of a strong magnetic field, the effective action of a composite scalar field in an scalar O(N) model is derived using two different methods. First, in the framework of worldline formalism, the 1PI n-point vertex function for the composites is determined in the limit of strong magnetic field. Then, the n-point effective action of the composites is calculated in the regime of lowest Landau level dominance. It is shown that in the limit of strong magnetic field, the results coincide and an effective field theory arises which is comparable with the conventional noncommutative field theory. In contrast to the ordinary case, however, the UV/IR mixing is absent in this modified noncommutative field theory.
description: Latex file, 19 pp, no figure
Gregarina sp. and Forficula auricularia Friends or Foes?
Creators: name: Salamanca, Francisco Arcila
Publisher: name: Zenodo
Year: 2016
Subjects: Forficula auricularia
Gregarina
Parasitic interaction
Sporozoa

description: Studying the costs and benefits of host-parasite interactions is of central importance to shed light on the evolutionary drivers of host life history traits. Although gregarines (Apicomplexa: Sporozoa) are one of the most frequent parasites in the gut of invertebrates, the diversity of its potential impacts on a host remains poorly explored. In this study, we addressed this gap in knowledge by investigating the prevalence of natural infections by the gregarine Gregarina ovata and testing how these infections shape a large set of morphological, behavioural and physiological traits in the European earwig Forficula auricularia. Our results first show that G. ovata was present in 76.8% of 573 field-sampled earwigs, and that its prevalence was both higher in males compared with females and increased between July and September
พฤติกรรมการจัดการขยะมูลฝอยของชุมชนในตำบลกระทุ่มล้ม อำเภอสามพราน จังหวัดนครปฐม
Creators: name: นภัส น้ำใจตรง
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: พฤติกรรม, การจัดการขยะมูลฝอย, ชุมชน (Behavior, The solid waste management, Community)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 179-190
Constrained evolution in Hilbert space and requantization
Creators: name: Grigorescu, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The quantum dynamics generated by time-dependent variational calculations is discussed from the perspective of geometric quantization. On examples, it is shown that approximate energy eigenstates can be associated to the quantized periodic orbits.
description: 14 pages, LaTex
High contrast imaging for the enhanced resolution imager and spectrometer (ERIS)
Creators: name: Kenworthy, Matthew A.
name: Snik, Frans
name: Keller, Christoph U.
name: Doelman, David
name: Por, Emiel H.
name: Absil, Olivier
name: Carlomagno, Brunella
name: Karlsson, Mikael
name: Huby, Elsa
name: Glauser, Adrian M.
name: Quanz, Sascha P.
name: Taylor, William D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: ERIS is a diffraction limited thermal infrared imager and spectrograph for the Very Large Telescope UT4. One of the science cases for ERIS is the detection and characterization of circumstellar structures and exoplanets around bright stars that are typically much fainter than the stellar diffraction halo. Enhanced sensitivity is provided through the combination of (i) suppression of the diffraction halo of the target star using coronagraphs, and (ii) removal of any residual diffraction structure through focal plane wavefront sensing and subsequent active correction. In this paper we present the two coronagraphs used for diffraction suppression and enabling high contrast imaging in ERIS.
description: 8 pages, 7 figures
Differences in the AGN Populations of Groups and Clusters: Clues to AGN Evolution
Creators: name: Shen, Yue
name: Mulchaey, John S.
name: Raychaudhury, Somak
name: Rasmussen, Jesper
name: Ponman, Trevor J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine optical and X-ray data for eight low redshift ($z\sim 0.06$) poor groups of galaxies from the {\it XI}({\it XMM/IMACS}) Groups Project to study the AGN population in the group environment. Among $\sim 140$ group members, we identify five AGN based on their optical emission lines. None of these optically-selected AGN are detected by {\it XMM-Newton}. One additional AGN is discovered in the {\it XMM-Newton} observations. This X-ray detected AGN, which has no obvious AGN emission line signatures in its optical spectrum, is a member of the only X-ray luminous group in our sample. The lack of a significant population of X-ray bright, but optically dull AGN among less dynamically evolved groups is in stark contrast to the large fraction of such objects in rich clusters of galaxies (Martini et al. 2006). We suggest this result can be explained by a physical scenario for AGN accretion evolution: AGN activity is initially triggered by galaxy merging, leading to a high accretion rate and an optically dominant phase (via thin disk accretion). As the accretion rate drops in time, the AGN gradually enters an X-ray dominant low-accretion phase (via a radiative inefficient accretion flow). In this picture, optical- and X-ray-selected AGN are the same population of supermassive black holes observed at different epochs. Within the context of this scenario, the majority of AGN in poor groups are in the high-accretion optically dominant phase, while the AGN population in rich clusters is mostly in the low-accretion X-ray dominant phase.
description: accepted to ApJL, 5 pages, 1 figure
Nonlinear dynamics of soft fermion excitations in hot QCD plasma II: Soft-quark - hard-particle scattering and energy losses
Creators: name: Markov, Yu. A.
name: Markova, M. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In general line with our first work [Yu.A. Markov, M.A. Markova, Nucl. Phys. A 770 (2006) 162] within the framework of semiclassical approximation a general theory for the scattering processes of soft (anti)quark excitations off hard thermal particles in hot QCD-medium is thoroughly considered. The dynamical equations describing evolution for the usual classical color charge $Q^a(t)$ and Grassmann color charges $θ^i(t), θ^{\dagger i}(t)$ of hard particle taking into account the soft fermion degree of freedom of the system are suggested. On the basis of these equations and the Blaizot-Iancu equations iterative procedure of calculation of effective currents and sources generating the scattering processes under consideration is defined and their form up to third order in powers of free soft quark field, soft gluon one, and initial values of the color charges of hard particle is explicitly calculated. With use of the generalized Tsytovich principle a connection between matrix elements of the scattering processes and the effective currents and sources is established. In the context of the effective theory suggested for soft and hard fermion excitations new mechanisms of energy losses of high-energy parton propagating through QCD-medium are considered.
description: 85 pages, 15 figures, added new appendix A, section 10 is removed, mistakes, and typing errors are corrected. Version to appear in Nucl. Phys. A