cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optical Reddening, Integrated HI Optical Depth, Total Hydrogen Column Density
Creators: name: Liszt, Harvey S
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Despite the vastly different angular scales on which they are measured, the integrated $λ$21 cm \HI\ optical depth measured interferometrically, \WHI, is a good proxy for the optical reddening derived from IR dust emission, with %\WHI\ $\equiv \intτ({\rm \HI}) ~{\rm dv} = (13.8\pm0.7)$\EBV$^{(1.10\pm0.03)}$ \kms\ \WHI\ $\propto$ \EBV$^{1.10}$ for 0.04 mag $\la$ \EBV\ $\la$ 4 mag. For \EBV\ $\la 0.04$ mag or \WHI\ $< 0.7$ \kms, less-absorbent warm and ionized gases assert themselves and $τ$(HI) is a less reliable tracer of \EBV. The \WHI-\EBV\ relationship can be inverted to give a broken power-law relationship between the total hydrogen column density N(H) and \WHI\ such that knowledge of \WHI\ alone predicts N(H) with an accuracy of a factor 1.5 ($\pm 0.18$ dex) across two orders of magnitude variation of \WHI. The \WHI-N(H) relation is invariant under a linear rescaling of the reddening measure used in the analysis and does not depend on knowing properties of the HI such as the spin temperature.
description: Accepted to Ap J
Jet Collimation by Small-Scale Magnetic Fields
Creators: name: Li, Li-Xin
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A popular model for jet collimation is associated with the presence of a large-scale and predominantly toroidal magnetic field originating from the central engine (a star, a black hole, or an accretion disk). Besides the problem of how such a large-scale magnetic field is generated, in this model the jet suffers from the fatal long-wave mode kink magnetohydrodynamic instability. In this paper we explore an alternative model: jet collimation by small-scale magnetic fields. These magnetic fields are assumed to be local, chaotic, tangled, but are dominated by toroidal components. Just as in the case of a large-scale toroidal magnetic field, we show that the ``hoop stress'' of the tangled toroidal magnetic fields exerts an inward force which confines and collimates the jet. The magnetic ``hoop stress'' is balanced either by the gas pressure of the jet, or by the centrifugal force if the jet is spinning. Since the length-scale of the magnetic field is small (< the cross-sectional radius of the jet << the length of the jet), in this model the jet does not suffer from the long-wave mode kink instability. Many other problems associated with the large-scale magnetic field are also eliminated or alleviated for small-scale magnetic fields. Though it remains an open question how to generate and maintain the required small-scale magnetic fields in a jet, the scenario of jet collimation by small-scale magnetic fields is favored by the current study on disk dynamo which indicates that small-scale magnetic fields are much easier to generate than large-scale magnetic fields.
description: 14 pages, no figure
Most Supermassive Black Holes must be Rapidly Rotating
Creators: name: Elvis, M.
name: Risaliti, G.
name: Zamorani, G.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the integrated spectrum of the X-ray background and quasars Spectral Energy Distribution to derive the contribution of quasars to the energy output of the Universe. We find a lower limit for the energy from accretion onto black holes of 6%, of the total luminosity of the Universe and probably more, with 15% quite possible. Comparing these values with the masses of black holes in the center of nearby galaxies we show that the accretion process must be on average very efficient: at least 15% of the accreted mass must be transformed into radiated energy. This further implies that most supermassive black holes are rapidly rotating.
description: 8 Pages, Astrophysical Journal Letters, in press
Optically variable active galactic nuclei in the 3 yr VST survey of the COSMOS field
Creators: name: De Cicco, D.
name: Paolillo, M.
name: Falocco, S.
name: Poulain, M.
name: Brandt, W. N.
name: Bauer, F. E.
name: Vagnetti, F.
name: Longo, G.
name: Grado, A.
name: Ragosta, F.
name: Botticella, M. T.
name: Pignata, G.
name: Vaccari, M.
name: Radovich, M.
name: Salvato, M.
name: Covone, G.
name: Napolitano, N. R.
name: Marchetti, L.
name: Schipani, P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The analysis of the variability of active galactic nuclei (AGNs) at different wavelengths and the study of possible correlations among different spectral windows are nowadays a major field of inquiry. Optical variability has been largely used to identify AGNs in multivisit surveys. The strength of a selection based on optical variability lies in the chance to analyze data from surveys of large sky areas by ground-based telescopes. However the effectiveness of optical variability selection, with respect to other multiwavelength techniques, has been poorly studied down to the depth expected from next generation surveys. Here we present the results of our r-band analysis of a sample of 299 optically variable AGN candidates in the VST survey of the COSMOS field, counting 54 visits spread over three observing seasons spanning > 3 yr. This dataset is > 3 times larger in size than the one presented in our previous analysis (De Cicco et al. 2015), and the observing baseline is ~8 times longer. We push towards deeper magnitudes (r(AB) ~23.5 mag) compared to past studies; we make wide use of ancillary multiwavelength catalogs in order to confirm the nature of our AGN candidates, and constrain the accuracy of the method based on spectroscopic and photometric diagnostics. We also perform tests aimed at assessing the relevance of dense sampling in view of future wide-field surveys. We demonstrate that the method allows the selection of high-purity (> 86%) samples. We take advantage of the longer observing baseline to achieve great improvement in the completeness of our sample with respect to X-ray and spectroscopically confirmed samples of AGNs (59%, vs. ~15% in our previous work), as well as in the completeness of unobscured and obscured AGNs. The effectiveness of the method confirms the importance to develop future, more refined techniques for the automated analysis of larger datasets.
description: 21 pages, 10 figures; accepted for publication in A&A
Selection for sexually dimorphic traits and signal diversity in fiddler crabs
Creators: name: Perez, Daniela
Publisher: name: The Australian National University
Year: 2017
Subjects: diverse sexual signals
female choice
social context
behavioural ecology
fiddler crabs
wave displays
robotic crabs
waving synchrony

description: The evolution of diverse sexual signals and traits in animals is a promising yet challenging field in behavioural ecology. Sexual features are under the influence of a multitude, and often cryptic, mechanisms. In addition, the composition and strength of selection varies for each study species. Fiddler crabs are ideal subjects for investigating the evolution of diverse sexual traits. Males possess one sexually dimorphic enlarged claw. The structure is used as a weapon in conflicts over territory and signaled in the form of wave displays as courtship to females and warning to intruders. The displays are diverse on the interspecific level, characterized by species-specific movement patterns. In this thesis, I explore the forces behind the evolution of sexually dimorphic claws and the great diversification of fiddler crab signals. In the first two chapters of my thesis I search for a clearer understanding of sexual selection in shaping the species-specific diversity of wave displays in fiddler crabs. First, I investigate if wave displays are cues for species identity in sympatric populations. I use robotic crabs in my experiments and verify that females are able to choose the conspecific over a heterospecific wave movement. In chapter II, I direct my focus to female natural choices and identify their preferences on wave displays and claw size. This final approach allows me to reveal other selective mechanisms, such as constraints from natural selection in male signaling effort. In the second part of my thesis, I expand my approach to the level of social context and its effects on fiddler crab sexual traits. In chapter III, I look into the laterality of the sexually dimorphic claw and examine the different fight endurances when opponents are same- or different-handed. I point out how distinct handedness ratios in fiddler crab populations set contrasting selective pressures in male-male coalitions. In chapter IV, I explore differential social situations in the production of wave signals, and take a step further to explore the social contexts that stimulate the emergence of a rare signal phenomenon, the synchronous waving. Finally, in chapter V, I look into signal diversity from a wider perspective by applying comparative approach to understand the evolution of the wave displays. I gather structural and temporal information of the wave displays of 28 species to predict the likelihood and evolutionary paths of presenting waves in synchrony. Lastly, I indicate how the phenomenon may stem from the particularities of a species mating systems and ecological adaptations.
Bibio clavipes Meigen 1818
Creators: name: Skartveit, John
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bibionidae
Bibio
Bibio clavipes

description: Bibio clavipes Meigen, 1818 (®gures 5±11)
Larva described by Bollow (1954) and Krivosheina (1962).
Whitish. Total length of full-grown larvae 8±12 mm (Bollow, 1954, not possible to measure in the specimens at hand).
 Head. Blackish. Head capsule width of last instar 0.89±0.97 mm (n = 2). Labrum as in ®gure 5. Mandible with ®ve teeth (®gure 6), maxilla and prementum as in ®gure 7. Antennae with three or four sensillae. Stemmata absent in the specimens at hand.
 Body. Whitish. Dorsal process row with processes arranged in three pairs, inner pair shorter than the outer pairs. One of the eight specimens examined has eight processes in the dorsal process row on ®rst abdominal segment but this is probably merely an aberration. Post-spiracular processes as long as two spiracle diameters, situated approximately two and a half spiracle diameter behind spiracle. Processes on ninth abdominal segment as long as 0.6 times length of segment, situated near hind edge. Cuticular scales rather small, closely packed. Prothorax (®gure 8) right behind head with transverse-oval scales, ca 12 m m wide, each with three to seven short spines, a band further back with 20±27 m m wide, unarmed scales. Metathorax (®gure 9) and ®rst abdominal segment, with roundish scales, indistictly outlined, 8±20 m m wide, each with three to ®ve spines. Fourth abdominal segment (®gure 10) scales 13±18 m m wide with two to ®ve spines. Dorsum of ninth abdominal segment (®gure 11) scales 27±33 m m wide, closely packed, with strongly undulating outline, each with a short, rounded peg. Venter of ninth abdominal segment scales 6±10 m m wide, each with a slender spine. Scales on all segments except prothorax and ninth abdominal of uniform appearance, not in alternating bands of smaller and larger scales. Spiracles protruding approximately one half spiracle diameter from cuticle.
 Distribution. Practically all of Palaearctic Region.
 Ecology. Eurytopical species. Deciduous forest, meadows, conifer forest. Fullgrown larvae should occur in July to August.
 Material. Norway, RY, Finnùy, Sevheim, under sallow tree, 28 August 1995, J. Skartveit leg. 2 larvae (ZMUB). Norway, HOI, Kvam, Geitaknottane nature reserve, 28 July 1997, J. Skartveit leg. 4 larvae, 12 August 1997, J. Skartveit leg. 2 larvae (ZMUB).
description: Published as part of Skartveit, John, 2010, The larvae of European Bibioninae (Diptera, Bibionidae), pp. 449-485 in Journal of Natural History 36 (4) on pages 454-458, DOI: 10.1080/00222930010023466, http://zenodo.org/record/5299771
Sigmoria Chamberlin 1939
Creators: name: Means, Jackson C.
name: Hennen, Derek A.
name: Tanabe, Tsutomu
name: Marek, Paul E.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Xystodesmidae
Sigmoria

description: Genus Sigmoria Chamberlin, 1939.
Vernacular name: ‘The Sigmoid Millipedes’
 Type species: Sigmoria munda Chamberlin, 1939.
Taxa included: 67 species, see Supp Material (online only) (Supp Text 1 [online only], Supp Dataset 2 [online only]).
description: Published as part of Means, Jackson C., Hennen, Derek A., Tanabe, Tsutomu & Marek, Paul E., 2021, Phylogenetic Systematics of the Millipede Family Xystodesmidae, pp. 1-26 in Insect Systematics and Diversity 5 (2) on page 15, DOI: 10.1093/isd/ixab003, http://zenodo.org/record/5384533
Optically Coherent Nitrogen-Vacancy Defect Centers in Diamond Nanostructures
Creators: name: Orphal-Kobin, Laura
name: Unterguggenberger, Kilian
name: Pregnolato, Tommaso
name: Kemf, Natalia
name: Matalla, Mathias
name: Unger, Ralph-Stephan
name: Ostermay, Ina
name: Pieplow, Gregor
name: Schröder, Tim
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: Condensed Matter Physics
subject: FOS: Physical sciences
subject: Nanophysics
subject: Quantum Physics
subject: 530 Physik

description: Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.
ИНФОРМАЦИОННЫЕ И КОММУНИКАЦИОННЫЕ ТЕХНОЛОГИИ КАК ОСНОВНОЙ ФАКТОР РАЗВИТИЯ ЦИФРОВОЙ ЭКОНОМИКИ И СТАРТАП-ПРОЕКТОВ УЗБЕКИСТАНА: ВЫЗОВЫ И ПЕРСПЕКТИВЫ
Creators: name: Каххорова, Маликахон
name: Рустамова, Махфуза
Publisher: name: Zenodo
Year: 2025

description: Статья посвящена анализу роли информационных и коммуникационных технологий (ИКТ) как основного фактора развития цифровой экономики и стартап-проектов в Узбекистане. В условиях глобализации и стремительного развития технологий ИКТ становятся ключевыми инструментами для модернизации различных отраслей экономики, стимулируя инновации и ускоряя процессы цифровизации. В статье рассматривается, как внедрение ИКТ влияет на развитие стартап-экосистемы, создавая новые возможности для молодежных и предпринимательских инициатив в стране. Особое внимание уделено вызовам, с которыми сталкиваются стартапы в Узбекистане, включая проблемы с доступом к технологиям, недостаток квалифицированных кадров и ограниченные инвестиционные ресурсы. Статья подчеркивает необходимость комплексных реформ и создания благоприятной среды для стимулирования роста ИКТ-сектора, что будет способствовать устойчивому экономическому развитию и инновационному прогрессу в Узбекистане.
Effective photon mass in nuclear matter and finite nuclei
Creators: name: Sun, Bao-Xi
name: Lu, Xiao-Fu
name: Shen, Peng-Nian
name: Zhao, En-Guang
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Electromagnetic field in nuclear matter and nuclei are studied. In the nuclear matter, because the expectation value of the electric charge density operator is not zero, different in vacuum, the U(1) local gauge symmetry of electric charge is spontaneously broken, and consequently, the photon gains an effective mass through the Higgs mechanism. An alternative way to study the effective mass of photon is to calculate the self-energy of photon perturbatively. It shows that the effective mass of photon is about $5.42MeV$ in the symmetric nuclear matter at the saturation density $ρ_0 = 0.16fm^{-3}$ and about $2.0MeV$ at the surface of ${}^{238}U$. It seems that the two-body decay of a massive photon causes the sharp lines of electron-positron pairs in the low energy heavy ion collision experiments of ${}^{238}U+{}^{232}Th$ .
description: 10 pages, 2 figures, 1 table, REVTEX4, submitted to Int. J. Mod. Phys. E
Bibio lepidus Loew 1871
Creators: name: Skartveit, John
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bibionidae
Bibio
Bibio lepidus

description: Bibio lepidus Loew, 1871 (®gure 82)
Larva brie¯y described by Brindle (1962). I have not been able to ®nd any specimens despite considerable searching on localities on which the imagines are common. The dorsal processes are arranged in three pairs, post-spiracular processes are very short and placed approximatel y two spiracle diameters posterior to spiracles, and the cuticular structure consists of densely packed, rounded, spineless scales (®gure 82).
 Distribution. Western Europe: Great Britain, Ireland, Scandinavia, Western Russia. Status in Central and Eastern Europe is uncertain.
 Ecology. Rather eurytopical species, common in woodlands and grasslands. Full-grown larvae should occur in July to August. It is interesting to note that the larva is apparently rather diVerent from that of Bibio clavipes, since these two species have been considered synonymous by several authors. The taxonomic problems within the Bibio clavipes group are still unresolved; possibly, the two forms act as good species in some areas (Great Britain, Scandinavia) while they merge into one species in other areas (Central Europe).
description: Published as part of Skartveit, John, 2010, The larvae of European Bibioninae (Diptera, Bibionidae), pp. 449-485 in Journal of Natural History 36 (4) on page 458, DOI: 10.1080/00222930010023466, http://zenodo.org/record/5299771
Macroscopic Fluid Approach to the Coherent Beam-Beam Interaction
Creators: name: Tzenov, Stephan I.
name: Davidson, Ronald C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Building on the Radon transform of the Vlasov-Poisson equations, a macroscopic fluid model for the coherent beam-beam interaction has been developed. It is shown that the Vlasov equation, expressed in action-angle variables, can be reduced to a closed set of hydrodynamic (fluid) equations for the beam density and current velocity. The linearized one dimensional equations have been analysed, and explicit expressions for the coherent beam-beam tuneshifts are presented.
description: LaTeX, 3 pages, To be presented at the Particle Accelerator Conference (PAC 2001)
Fang Zhou_Suppl files.pdf
Creators: name: , Zhou
Publisher: name: figshare
Year: 2019
Subjects: subject: 111103 Nutritional Physiology
subject: FOS: Health sciences

description: Supplemental Fig. S1 Growth of murine gut bacteria in bovine milk exosome-defined culture media for seven days (left panel). Unpaired student’s t-test analysis, **P < 0.01. The extracellular vesicles used had a size as expected for exosomes (right panel).
Supplemental Fig. S2 Bacterial families in ceca of mice fed ERS or ERD diets at ages 7, 15 and 47 weeks. ERD, exosome and RNA-depleted; ERS, exosome and RNA-sufficient; f, family; o, order; n = 8/diet group/sex/time point.
Supplemental Table S1 Effect of diets on body weight and body fat in C57BL/6 mice*.
Supplemental Table S2 Effect of diets on microbial phyla in C57BL/6 mice at 7 weeks*.
Supplemental Table S3 LefSe (linear discriminant analysis coupled with effect size measurements) test for the effects of diet and age effect on microbial OTUs*.
Supplemental Table S4 Associations between variable (sex or age) and abundance of OTUs in the murine cecum by MaAsLin analysis*.
Cleptoria Chamberlin 1939
Creators: name: Means, Jackson C.
name: Hennen, Derek A.
name: Tanabe, Tsutomu
name: Marek, Paul E.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Xystodesmidae
Cleptoria

description: Cleptoria ‘n. sp. Hagoods’ Means and Marek 2017
 Material examined: Type specimens. ♂ holotype (VTEC MPE00291), 1 ♂ paratype (VMNH SPC000389), and 2 ♀ paratypes (VTEC SPC000390, 394). Holotype from South Carolina, Barnwell County, Toby Creek, near Hagoods Mill, SC-64 (33.2119°N, - 81.3201°W, Elev: 46 m), 23 November 2003, (Coll: D. Beamer). Paratypes from South Carolina, Barnwell County, Hagoods Mill, SC-64, 351 rd m W jct w/ Lebanon Rd., nr Toby Ck (33.21206°N, - 81.3198°W, Elev: 46 m), 17 October 2004, beneath leaf litter (Quercus, Acer) (Coll: P. Marek, D. Beamer, M. Beamer). Material examined listed in Supp Table 2 (online only).
 Diagnosis: Adult males of Sigmoria beameri n. sp. are distinct from other apheloriine species based on the following combination of characters: Gonopods. Gonopodal acropodite broad, curving dorsomedially at an almost 90° angle at anterior bend (Fig. 13A). Basal zone lacking spines or tubercles, prefemoral process absent. Medial flange thick, laminate. Acropodite peak broad, flattened, distally with a wide, laminate lateral flange which is distinctly constricted at its base, setting it off from its ventrally-directed tip, separating it from other species with a birdhead-like acropodal apex (= Cleptoria) Sigmoria abbotti (Hoffman, 1967), Sigmoria bipraesidens (Hoffman, 1967), Sigmoria macra (Chamberlin, 1939), Sigmoria rileyi (Bollman, 1889), Sigmoria robusta Shelley, 1986, Sigmoria shelfordi (Loomis, 1944), and Sigmoria arcuata (Shelley, 1981). Acropodite without a cingulum, as in Brachoria and Appalachioria. Color. Tergites with light-red paranotal spots (Fig. 5R). Dark brown background. Collum with light red anterior and lateral margins.
 Description: Supp Table 3 (online only). Based on Holotype (♂) MPE00291.
Measurements (mm): BL = 47.0, CW = 6.9, IW = 4.5, ISW = 1.5, B11W = 9.4, B11H = 5.8.
 Variation: No significant variation from the holotype was observed.
  Ecology: Sigmoria beameri  n. sp. was collected from the riparian area around Toby Creek and was found under oak and maple leaves.
 Distribution: Only known from the type locality, a small wooded area around Toby Creek, located in the Coastal Plain region of South Carolina.
 Etymology: This species is named for its discoverer, Dr. David Beamer of Nash Community College. The specific name is a genitive noun derived as a patronym.
description: Published as part of Means, Jackson C., Hennen, Derek A., Tanabe, Tsutomu & Marek, Paul E., 2021, Phylogenetic Systematics of the Millipede Family Xystodesmidae, pp. 1-26 in Insect Systematics and Diversity 5 (2) on page 16, DOI: 10.1093/isd/ixab003, http://zenodo.org/record/5384533
Rate of dark photon emission from electron positron annihilation in massive stars
Creators: name: Rrapaj, Ermal
name: Sieverding, Andre
name: Qian, Yong-Zhong
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We calculate the rate of production of dark photons from electron-positron pair annihilation in hot and dense matter characteristic of supernova progenitors. Given the non-linear dependence of the emission rate on the dark photon mass and current astrophysical constraints on the dark photon parameter space, we focus on the mass range of 1--10 MeV. For the conditions under consideration both mixing with the in-medium photon and plasma effects on the electron dispersion relation are non-negligible and are explored in detail. We perform our calculations to the leading order in the fine-structure constant. Transverse and longitudinal photon modes are treated separately given their different dispersion relations. We consider the implications for the evolution of massive stars when dark photons decay either into particles of the standard model or of the dark sector.
description: 6 pages, 4 figures
Supplementary Information for "Harnessing tipping points in complex ecological networks"
Creators: name: Junjie Jiang
name: Hastings, Alan
name: Lai, Ying-Cheng
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Supplementary materials providing further support for the main results
Collective modes in pumped unconventional superconductors with competing ground states
Creators: name: Müller, Marvin A.
name: Volkov, Pavel A.
name: Paul, Indranil
name: Eremin, Ilya M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the recent development of terahertz pump-probe experiments, we investigate the short-time dynamics in superconductors with multiple attractive pairing channels. Studying a single-band square lattice model with spin-spin interaction as an example, we find the signatures of collective excitations of the pairing symmetries (known as Bardasis-Schrieffer modes) as well as the order parameter amplitude (Higgs mode) in the short-time dynamics of the spectral gap and quasiparticle distribution after an excitation by a pump pulse. We show that the polarization and intensity of the pulse can be used to control the symmetry of the non-equilibrium state as well as frequencies and relative intensities of the contributions of different collective modes. We find particularly strong signatures of the Bardasis-Schrieffer mode in the dynamics of the quasiparticle distribution function. Our work shows the potential of modern ultrafast experiments to address the collective excitations in unconventional superconductors and highlights the importance of sub-dominant interactions for the non-equilibrium dynamics in these systems.
description: 5+3 pages, 5+1 figures
Researching a multipart singing tradition: The human dimension as a driving force for preservation and creativity among the vlach-aromanians of Drenova (Korça)
Creators: name: Minga, Mikaela
Publisher: name: Pavia University Press - Edizioni dell'Università degli Studi di Pavia
Year: 2025

description: This article evolves from a musical project for the CD album Aromanian Songs from Drenova, (Squilibri, 2018) with multipart songs from the aromanian-vlach minority of Drenova, a village in Korça’s district, in southeast Albania. This area has been among the most vital ones in the three-part singing style and this minority has played a significant role. Alongside the recording process, a research on the documentary level evolved, for investigating a rather neglected presence of singing practices of this group. This article explores the human dimension focusing on four eminent aspects: personal history, embodiment, self-expression, and joint action. The latter have been a driving force for creativity and preservation in this singing practice.
description: Philomusica on-line, Vol 23, N° 1 (2024): Multipart music from social distancing to embodiment
Structure of Protostellar Collapse Candidate B335 Derived from Near-Infrared Extinction Maps
Creators: name: Harvey, Daniel W. A.
name: Wilner, David J.
name: Lada, Charles J.
name: Myers, Philip C.
name: Alves, Joao F.
name: Chen, Hua
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a near-infrared extinction study of the dark globule B335, a protostellar collapse candidate, using data from HST/NICMOS and the W.M. Keck Observatory. These data allow a new quantitative test of the "inside-out" collapse model previously proposed to explain molecular line profiles observed toward this region. We find that the shape of the density profile is well matched by the collapse model, but that the amount of extinction corresponds to larger column densities than predicted. An unstable Bonnor-Ebert sphere with dimensionless outer radius xi_max=12.5+/-2.6 provides an equally good description of the density profile, and is indistinguishable from the collapse model over the range in radius sampled by the data. The bipolar outflow driven by the embedded YSO has an important effect on the extinction through the core, and modeling the outflow as a hollowed-out bipolar cone of constant opening angle provides a good match to theobservations. The complete exinction map is well reproduced by a model that includes both infall and outflow, and an extra 20% dispersion that likely results from residual turbulent motions. This fitted model has an infall radius of R_inf=26"+/-3"(0.031pc for 250pc distance), and an outflow cone semi-opening angle of alpha=41+/-2 degrees. The fitted infall radius is consistent with those derived from molecular line observations and supports the inside-out collapse interpretation of the density structure. The fitted opening angle of the outflow is slightly larger than observed in CO emission, perhaps because the full extent of the outflow cone in CO becomes confused with ambient core emission at low velocities.
description: Accepted to the Astrophysical Journal; 43 pages, 13 figures
title: Стратегические приоритеты развития социально-экономических систем в условиях цифровизации
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2025

description: Монография подготовлена в соответствии с госбюджетной научно-исследовательской работой кафедры производственного менеджмента Социально-экономического института Саратовского государственного технического университета имени Гагарина Ю. А. Авторским коллективом обобщен теоретический, методологический, практический материал, ориентированный на стратегическое направление научного исследования приоритетов развития социально-экономических систем в условиях цифровизации. Издание может быть интересно широкому кругу читателей, интересующихся данной проблемой, в том числе предназначается для специалистов, занимающихся проблемами экономики и менеджмента, туризма, сервиса, цифровизации; научных работников, преподавателей вузов, аспирантов, студентов высших учебных заведений.
A Proper Motion Survey for White Dwarfs with the Wide Field Planetary Camera 2
Creators: name: Nelson, Cailin A.
name: Cook, Kem H.
name: Axelrod, Tim S.
name: Mould, Jeremy R.
name: Alcock, Charles
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed a search for halo white dwarfs as high proper motion objects in a second epoch WFPC2 image of the Groth-Westphal strip. We identify 24 high proper motion objects with mu > 0.014 ''/yr. Five of these high proper motion objects are identified as strong white dwarf candidates on the basis of their position in a reduced proper motion diagram. We create a model of the Milky Way thin disk, thick disk and stellar halo and find that this sample of white dwarfs is clearly an excess above the < 2 detections expected from these known stellar populations. The origin of the excess signal is less clear. Possibly, the excess cannot be explained without invoking a fourth galactic component: a white dwarf dark halo. We present a statistical separation of our sample into the four components and estimate the corresponding local white dwarf densities using only the directly observable variables, V, V-I, and mu. For all Galactic models explored, our sample separates into about 3 disk white dwarfs and 2 halo white dwarfs. However, the further subdivision into the thin and thick disk and the stellar and dark halo, and the subsequent calculation of the local densities are sensitive to the input parameters of our model for each Galactic component. Using the lowest mean mass model for the dark halo we find a 7% white dwarf halo and six times the canonical value for the thin disk white dwarf density (at marginal statistical significance), but possible systematic errors due to uncertainty in the model parameters likely dominate these statistical error bars. The white dwarf halo can be reduced to around 1.5% of the halo dark matter by changing the initial mass function slightly. The local thin disk white dwarf density in our solution can be made consistent with the canonical value by assuming a larger thin disk scaleheight of 500 pc.
description: revised version, accepted by ApJ, results unchanged, discussion expanded
Analysis of directed flow from elliptic flow
Creators: name: Borghini, N.
name: Dinh, P. M.
name: Ollitrault, J. -Y.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The directed flow of particles produced in ultrarelativistic heavy ion collisions at SPS and RHIC is so small that currently available methods of analysis are at the border of applicability. Standard two-particle and flow-vector methods are biased by large nonflow correlations. On the other hand, cumulants of four-particle correlations, which are free from this bias, are plagued by large statistical errors. Here, we present a new method based on three-particle correlations, which uses the property that elliptic flow is large at these energies. This method may also be useful at intermediate energies, near the balance energy where directed flow vanishes.
description: 11 pages revtex4
Beyond the Aesthetic: A Study of Indigeneity and Narrative in Contemporary Australian Art
Creators: name: Slocum, Catherine
Publisher: name: The Australian National University
Year: 2016
Subjects: Vernon Ah Kee
Tony Albert
Brook Andrew
Daniel Boyd
Dianne Jones
Christopher Pease
Christian Thompson
Australian art
Aboriginal art
Indigenous Australian art
contemporary Australian art
Aboriginal and Torres Strait Islander art
Indigeneity
narrative art
Australian history
Aboriginal history
Indigenous Australian history
postcolonial
post-colonial
colonisation
cultural identity
race relations
identity politics

description: Over the past decade, some of the most celebrated art to emerge from Australia has been the work of a group of Indigenous artists whose practice has been instrumental in relocating Indigenous experience and establishing an Indigenous sense of place within the complex social, political and cultural landscape of contemporary Australia. Their work is rooted in the urban Indigenous art movement that swept across the southeast of Australia in the mid-1980s. Like many artists once on the periphery of mainstream artistic narratives, however, these artists have benefited from globalisation, and they now find their work in the evolving discussions of contemporary art worldwide. No other group of artists has offered a more thorough or far-reaching artistic investigation of the history and lived experience of Indigenous Australians since colonisation, yet their work continues to be overlooked as a core area of academic inquiry. This thesis seeks to both illuminate its cultural significance and to state the case for continued art historical research on work tied to the narrative of Australia’s shared history. It does so through an in-depth reading of artworks produced by Vernon Ah Kee, Tony Albert, Brook Andrew, Daniel Boyd, Dianne Jones, Christopher Pease and Christian Thompson since 2000. At the forefront of these pieces are narratives underlining the subjugation of Australia’s Indigenous history, the intergenerational impact of colonisation and its legacy and the continued misrepresentations by others of Indigenous people and culture.
Accidental parabolics and relatively hyperbolic groups
Creators: name: Dahmani, Francois
Publisher: name: arXiv
Year: 2002
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20E07

description: By constructing, in the relative case, objects analoguous to Rips and Sela's canonical representatives, we prove that the set of images by morphisms without accidental parabolic, of a finitely presented group in a relatively hyperbolic group, is finite, up to conjugacy.
description: Revision, 24 pages, 4 figures
The contribution of Quasars to the Far Infrared Background
Creators: name: Risaliti, G.
name: Elvis, M.
name: Gilli, R.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent observational results obtained with SCUBA, COBE and ISO have greatly improved our knowledge of the infrared and sub-mm background radiation. These limits become constraining given the realization that most AGNs are heavily obscured and must reradiate strongly in the IR/sub-mm. Here we predict the contribution of AGNs to the IR/sub-mm background, starting from measurements of the hard X-ray background. We show that an application of what we know of AGN Spectral Energy Distributions (SEDs) and the IR background requires that a significant fraction of the 10-150 micron background comes from AGNs. This conclusion can only be avoided if obscured AGNs are intrinsically brighter in the X-rays (with respect to the optical-UV) than unobscured AGNs, contrary to ``unified schemes'' for AGNs, or have a dust to gas ratio much lower (< 0.1) than Galactic. We show that these results are rather robust and not strongly dependent on the details of the modeling.
description: 13 pages, 1 figure, Astrophysical Journal, in press
Nannaria Chamberlin 1918
Creators: name: Means, Jackson C.
name: Hennen, Derek A.
name: Tanabe, Tsutomu
name: Marek, Paul E.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Xystodesmidae
Nannaria

description: Genus Nannaria Chamberlin, 1918   Vernacular Name: ‘TheTwisted-Claw Millipedes’
 Type species: Nannaria minor Chamberlin, 1918.
Taxa included: 26 species, see Supp Material (online only) (Supp Text 1 [online only], Supp Dataset 2 [online only]).
description: Published as part of Means, Jackson C., Hennen, Derek A., Tanabe, Tsutomu & Marek, Paul E., 2021, Phylogenetic Systematics of the Millipede Family Xystodesmidae, pp. 1-26 in Insect Systematics and Diversity 5 (2) on page 16, DOI: 10.1093/isd/ixab003, http://zenodo.org/record/5384533
Model for pairing phase transition in atomic nuclei
Creators: name: Schiller, A.
name: Guttormsen, M.
name: Hjorth-Jensen, M.
name: Rekstad, J.
name: Siem, S.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A model is developed which allows the investigation and classification of the pairing phase transition in atomic nuclei. The regions of the parameter space are discussed for which a pairing phase transition can be observed. The model parameters include: number of particles, attenuation of pairing correlations with increasing seniority, single particle level spacing, and pairing gap parameter. It is argued that for nuclear models, the pairing phase transition has to be separated in temperature from the signal of the exhaustion of the finite model space.
description: 19 pages including 1 table and 9 figures
Bringing manifold learning and dimensionality reduction to SED fitters
Creators: name: Hemmati, Shoubaneh
name: Capak, Peter
name: Pourrahmani, Milad
name: Nayyeri, Hooshang
name: Stern, Daniel
name: Mobasher, Bahram
name: Darvish, Behnam
name: Davidzon, Iary
name: Ilbert, Olivier
name: Masters, Daniel
name: Shahidi, Abtin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We show unsupervised machine learning techniques are a valuable tool for both visualizing and computationally accelerating the estimation of galaxy physical properties from photometric data. As a proof of concept, we use self organizing maps (SOMs) to visualize a spectral energy distribution (SED) model library in the observed photometry space. The resulting visual maps allow for a better understanding of how the observed data maps to physical properties and to better optimize the model libraries for a given set of observational data. Next, the SOMs are used to estimate the physical parameters of 14,000 z~1 galaxies in the COSMOS field and found to be in agreement with those measured with SED fitting. However, the SOM method is able to estimate the full probability distribution functions for each galaxy up to about a million times faster than direct model fitting. We conclude by discussing how this speed up and learning how the galaxy data manifold maps to physical parameter space and visualizing this mapping in lower dimensions helps overcome other challenges in galaxy formation and evolution.
description: 6 pages, 5 figures, submitted to ApJL
New Developments on Gravitational Force and Nonlinear Oscillations of Space
Creators: name: Kursunoglu, Behram N.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This paper contains results obtained as solutions of the Unified Field Theory equations. It yields space nonlinear oscillations, a quartet of gravitational forces, quintessence, and replaces Einstein's Cosmological Constant by an invariant parameter $r_0$ which prevails over the entire evolution of the Universe.
#2 Review Basic Statistics for Factor analysis
Creators: name: Brown, Gavin
Publisher: name: The University of Auckland
Year: 2019
Subjects: subject: 140302 Econometric and Statistical Methods
subject: FOS: Economics and business
subject: 10401 Applied Statistics
subject: FOS: Mathematics

description: This is a lecture presented at the 6th psychometric summer school at the higher school of economics in Moscow in August 2019. This covers essential ideas for conducting factor analysis. Topics include:Ordinary Least SquaresNormal DistributionConfidence IntervalsCovariance/CorrelationsRegressionEffect size
Multicollinearity
Chi-squareOutliers
Measuring a QED cross section via a witness particle
Creators: name: Araujo, Jonas B.
name: Hiller, B.
name: da Paz, I. G.
name: Sampaio, Marcos
name: Costa, H. A. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a QED scattering ($AB\rightarrow AB$), in which $B$ is initially entangled with a third particle ($C$) that does not participate directly in the scattering. The effect of the scattering over $C$'s final state is evaluated and we note coherence (off-diagonal) terms are created, which lead to non null values for $\langle σ_x\rangle$ and $\langle σ_y\rangle$ that are, in principle, measurable in a Stern-Gerlach apparatus. We chose a particular QED scattering ($e^+e^-\rightarrowμ^+μ^-$) and found that $\langle σ_x\rangle$ and $\langle σ_y\rangle$ are proportional to the total cross section ($σ_{\text{total}}$) of the $AB$ scattering, besides being maximal if $BC$'s initial state is taken as a Bell basis. Furthermore, we calculated the initial and final mutual informations $I_{AC}$ and $I_{BC}$, and noticed an increase (decrease) in $I_{AC}$ ($I_{BC}$), which indicates that, after $AB$ interact, the total amount of correlations (quantum $+$ classical) are distributed among the $3$ subsystems.
description: 7 pages, 4 figures
Nannaria hokie Means, Hennen, Marek 2021, New Species
Creators: name: Means, Jackson C.
name: Hennen, Derek A.
name: Tanabe, Tsutomu
name: Marek, Paul E.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Xystodesmidae
Nannaria
Nannaria hokie

description: Nannaria hokie Means, Hennen, Marek, New Species   Vernacular Name: ‘The Hokie Twisted-Claw  Millipede’
description: Published as part of Means, Jackson C., Hennen, Derek A., Tanabe, Tsutomu & Marek, Paul E., 2021, Phylogenetic Systematics of the Millipede Family Xystodesmidae, pp. 1-26 in Insect Systematics and Diversity 5 (2) on page 17, DOI: 10.1093/isd/ixab003, http://zenodo.org/record/5384533
The Role of Tidal Interactions in Star Formation
Creators: name: Larson, Richard B.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Nearly all of the initial angular momentum of the matter that goes into each forming star must somehow be removed or redistributed during the formation process. The possible transport mechanisms and the possible fates of the excess angular momentum are discussed, and it is argued that transport processes in disks are probably not sufficient by themselves to solve the angular momentum problem, while tidal interactions with other stars in forming binary or multiple systems are likely to be of very general importance in redistributing angular momentum during the star formation process. Most, if not all, stars probably form in binary or multiple systems, and tidal torques in these systems can transfer much of the angular momentum from the gas around each forming star to the orbital motions of the companion stars. Tidally generated waves in circumstellar disks may contribute to the overall redistribution of angular momentum. Stars may gain much of their mass by tidally triggered bursts of rapid accretion, and these bursts could account for some of the most energetic phenomena of the earliest stages of stellar evolution, such as jet-like outflows. If tidal interactions are indeed of general importance, planet-forming disks may often have a more chaotic and violent early evolution than in standard models, and shock heating events may be common. Interactions in a hierarchy of subgroups may play a role in building up massive stars in clusters and in determining the form of the upper IMF. Many of the processes discussed here have analogs on galactic scales, and there may be similarities between the formation of massive stars by interaction-driven accretion processes in clusters and the buildup of massive black holes in galactic nuclei.
description: revised version accepted for publication in MNRAS
Widening Perspectives: The Intellectual and Social Benefits of Astrobiology, Big History, and the Exploration of Space
Creators: name: Crawford, Ian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Astrobiology is the field of science devoted to searching for life elsewhere in the Universe. It is inherently interdisciplinary, integrating results from multiple fields of science, and in this respect has strong synergies with 'big history'. I argue that big history and astrobiology are both acting to widen human perspectives in intellectually and socially beneficial directions, especially by enhancing public awareness of cosmic and evolutionary worldviews. I will further argue that these perspectives have important implications for the social and political organisation of humanity, including the eventual political unification of our planet. Astrobiology and big history are also concerned with the future of humanity, and I will argue that this future will be culturally and intellectually enriched if it includes the exploration of the universe around us.
description: Published in the Journal of Big History, Vol III(3), pp. 205 - 224, 2019