cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Influence of Quasi-Bi-Stripe Charge Order on the Resistivity and Magnetism in a Bilayer Manganite La$_{2-2x}$Sr$_{1+2x}$Mn$_{2}$O$_{7}$
Creators: name: Kubota, M.
name: Oohara, Y.
name: Yoshizawa, H.
name: Fujioka, H.
name: Shimizu, K.
name: Hirota, K.
name: Moritomo, Y.
name: Endoh, Y.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The charge ordering in the bilayer manganite system La$_{2-2x}$Sr$_{1+2x}$Mn$_{2}$O$_{7}$ with $0.30 \le x \le 0.50$ has been studied by neutron diffraction. The charge order is characterized by the propagation vector parallel to the [1 0 0] direction (MnO$_2$ direction), but the correlation length is short-ranged and extremely anisotropic, being $\sim 0.02a^{*}$ and $\sim 0.2a^{*}$ parallel and perpendicular to the modulation direction, respectively. The observed charge order can be viewed as a quasi-bi-stripe order, and accounts well for the $x$ dependence of the resistivity. The quasi-bistripe order is stable within the ferromagnetic (FM) MnO$_2$ layers in the A-type antiferromagnetic order, but is instabilized by the 3 dimensional FM order.
description: 11 pages, 5 figures
The host galaxies of FeLoBAL quasars at z$\sim$0.9 are not dominated by recent major mergers
Creators: name: Villforth, C.
name: Herbst, H.
name: Hamann, F.
name: Hamilton, T.
name: Bertemes, C.
name: Efthymiadou, A.
name: Hewlett, T.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Theoretical models have suggested an evolutionary model for quasars, in which most of luminous quasars are triggered by major mergers. It is also postulated that reddening as well as powerful outflows indicate an early phase of activity, close to the merger event. We test this model on a sample of quasars with powerful low ionization outflows seen in broad Iron absorption lines (FeLoBAL). This sample of objects show strong reddening in the optical and fast ($\sim$0.1c) high column density outflows. We present HST WFC3/IR F160W imaging of 10 FeLoBAL host galaxies at redshifts z$\sim$0.9 ($λ_{rest}\sim8500Å$). We compare the host galaxy morphologies and merger signatures of FeLoBALs to luminous blue non-BAL quasars from Villforth et al. 2017 of comparable luminosity, which show no excess of merger features compared to inactive control samples. If FeLoBAL quasars are indeed in a young evolutionary state, close in time to the initial merging event, they should have strong merger features. We find that the host galaxies of FeLoBAL quasars are of comparable luminosity to the host galaxies of optical quasars and show no enhanced merger rates. When looking only at quasars without strong PSF residuals, an enhancement in disturbed and merger rates is seen. While FeLoBAL hosts show weak enhancements over a control of blue quasars, their host galaxies are not dominated by recent major mergers.
description: accepted for publication in MNRAS
Fission Gas Release from Irradiated UO2+x During Transient Annealing
Creators: name: A. R. Massih
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Plant Biology
subject: Computational Biology

description: Oxidation of UO2 fuel under off-normal and normal reactor conditions occurs when fuel cladding fails, thereby allowing steam/water to enter the fuel rod. The steam/water will react with the fuel to produce UO2+x thus releasing hydrogen, with x standing for the amount of interstitial oxygen ions above the stoichiometric value. In this technical note the impact of fuel oxidation on fission gas release (FGR) is modeled and discussed. The classical diffusion equation is used to describe migration and release of fission product gas (Xe) in UO2+x under time-varying postirradiation annealing conditions. We assume that the main quantity affected by fuel oxidation is the effective diffusivity of fission gas. Fuel oxidation enhances the diffusivity as a function of x in UO2+x in a parabolic fashion for 0.005 ≤ x ≤ 0.12 in the temperature range of 1000 ≤ T ≤ 1600 K. We first benchmark our model against an annealing test in which for x = 0.004 the Xe release fraction was measured as a function of time (temperature) during annealing. Furthermore, we apply the model to simulate a series of postirradiation annealing tests on UO2+x fuel, in which FGR fractions were measured for a given thermal ramp history in the range 0.00 ≤ x ≤ 0.66. The results of our computations in the range 0.004 ≤ x ≤ 0.20 show good agreement with measurements.
Addressing energy density functionals in the language of path-integrals I: Comparative study of diagrammatic techniques applied to the (0+0)-D $O(N)$-symmetric $φ^{4}$-theory
Creators: name: Fraboulet, Kilian
name: Ebran, Jean-Paul
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The energy density functional (EDF) method is currently the only microscopic theoretical approach able to tackle the entire nuclear chart. Nevertheless, it suffers from limitations resulting from its empirical character and deteriorating its reliability. This paper is part of a larger program that aims at formulating the EDF approach as an effective field theory (EFT) in order to overcome these limitations. A relevant framework to achieve this is the path-integral (PI) formulation of quantum field theory (QFT). The latter indeed provides a wide variety of treatments of the many-body problem well suited to deal with non-perturbative interactions and to exploit a Lagrangian resulting from an EFT as a starting point. While developing the formalism in a general setting, we present a comparative study of such techniques applied to a toy model, i.e. the (0+0)-D $O(N)$-symmetric $φ^{4}$-theory. More specifically, our focus will be on the following diagrammatic techniques: loop expansion (LE), optimized perturbation theory (OPT) and self-consistent perturbation theory (SCPT). With these methods, we notably address the spontaneous breakdown of the $O(N)$ symmetry with care especially since spontaneous symmetry breakings (SSBs) play a paramount role in current implementations of the EDF approach.
description: This article is part of a PhD project. The corresponding manuscript can be found at: arXiv:2210.16676
Scaling of the specific heat of superfluids confined in pores
Creators: name: Schultka, Norbert
name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the scaling properties of the specific heat of the XY model on lattices H x H x L with L >> H (i.e. in a bar-like geometry) with respect to the thickness H of the bar, using the Cluster Monte Carlo method. We study the effect of the geometry and boundary conditions on the shape of the universal scaling function of the specific heat by comparing the scaling functions obtained for cubic, film, and bar-like geometry. In the presence of physical boundary conditions applied along the sides of the bars we find good agreement between our Monte Carlo results and the most recent experimental data for superfluid helium confined in pores.
description: 10 pages, 4 figures, Revtex
Anomala anoguttata Burmeister 1844
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Rutelidae
Anomala
Anomala anoguttata

description: Anomala anoguttata Burmeister, 1844
 Anomala anoguttata Burmeister, 1844: 280.
 Material. 1 male, 3 females, Indonesia, Papua, Biak I., Biak Kota, Samau village, 18– 19.11.2012, A. M. Prokofiev leg.; 1 male, 1 female, Biak Utar, near Napdori village, 2–3 km from right bank of Air Napdori river, black light, 10– 11.11.2012, A. M. Prokofiev leg.
 Remarks. This species is widely distributed from the Philippines to the Solomon Islands (judging from the specimens kept in the Ohaus collection, Museum für Naturkunde, Berlin; author’s unpublished data). Four of my specimens were collected in agricultural lands near a town; the two other specimens came to a light in a disturbed secondary forest.
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 72, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
MALARIA, UN BREVE RESUMEN DE ALGUNAS DE SUS CARACTERÍSTICAS Y MANEJO EN COLOMBIA
Creators: name: Pérez, Mario Alejandro Montero
name: Pedroza, Jose Rubiano
Publisher: name: figshare
Year: 2019
Subjects: subject: 110399 Clinical Sciences not elsewhere classified
subject: FOS: Clinical medicine

description: La malaria es una enfermedad endémica en una gran parte del territorio nacional, que puede llegar a ser altamente epidémica, transmitida principalmente por el mosquito vector anopheles que se presenta mayoritariamente en áreas localizadas por debajo de los 1.500 msnm Aunque la mortalidad por malaria ha disminuido, Colombia aún se encuentra en la fase de control, por lo que sigue siendo necesario la implementación de medidas de control. En el país predomina la malaria por P. vivax , sin embargo, la proporción de casos de malaria por P. falciparumes una de las más altas de los países del continente. La detección precoz de los casos y la administración del tratamiento, los términos colectivos, la acción más importante, la prevención primaria y la interrupción de la transmisión en el control de la malaria. Por cuentos motivos, la malaria, la enfermedad, la información, la vigilancia, la prevención, el control y la atención especial en la salud pública. 
tailfindr: Alignment-free poly(A) length measurement for Oxford Nanopore RNA and DNA sequencing
Creators: name: Niazi, Adnan M.
name: Krause, Maximilian
name: Labun, Kornel
name: Yamila N. Torres Cleuren
name: Müller, Florian S.
name: Valen, Eivind
Publisher: name: F1000 Research Limited
Year: 2019

description: A poly(A) tail is a stretch of adenosines at the 3`-end of mRNA transcripts, and it plays an important role in nuclear export, stability, and translational regulation of mRNA. tailfindr is an R package for estimating poly(A) tail lengths from Oxford Nanopore Sequencing data. This poster explains how tailfindr works.
Additional file 5 of Pediatric methylation class HGNET-MN1: unresolved issues with terminology and grading
Creators: name: Tauziède-Espariat, Arnault
name: Pagès, Mélanie
name: Roux, Alexandre
name: Siegfried, Aurore
name: Uro-Coste, Emmanuelle
name: Nicaise, Yvan
name: Sevely, Annick
name: Gambart, Marion
name: Boetto, Sergio
name: Dupuy, Martin
name: Richard, Pomone
name: Perbet, Romain
name: Vinchon, Matthieu
name: Caron, Sabine
name: Andreiuolo, Felipe
name: Gareton, Albane
name: Lechapt, Emmanuèle
name: Chrétien, Fabrice
name: Puget, Stéphanie
name: Grill, Jacques
name: Boddaert, Nathalie
name: Varlet, Pascale
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 5: Table S1. Immunoprofile of HGNET-MN1 of our series
The blazar GB1428+4217: a warm absorber at z=4.72?
Creators: name: Fabian, A. C.
name: Celotti, A.
name: Iwasawa, K.
name: Ghisellini, G.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: BeppoSAX observations of the high redshift (z=4.72) blazar GB 1428+4217 confirm the presence of a complex soft X-ray spectrum first seen with the ROSAT PSPC. Flattening below a rest frame energy of 5 keV can be accounted for by absorption from an equivalent column density of (cold) gas with N_H ~ 8 x 10^22 cm^-2. Below 2 keV a (variable) excess of a factor ~ 20 above the extrapolated absorbed spectrum is also detected. These findings are consistent with and extend to higher redshifts the correlation between increasing soft X-ray flattening and increasing z, previously pointed out for large samples of radio-loud quasars. We propose that such features, including X-ray absorption, soft excess emission as well as absorption in the optical spectra, can be satisfactorily accounted for by the presence of a highly-ionized nuclear absorber with column N_H ~ 10^23 cm^-2, with properties possibly related to the conditions in the nuclear regions of the host galaxy. High energy X-ray emission consistent with the extrapolation of the medium energy spectrum is detected up to ~ 300 keV (rest frame).
description: 7 pages, 13 figures; MNRAS, in press
Matching the Quasi Meson Distribution Amplitude in RI/MOM scheme
Creators: name: Liu, Yu-Sheng
name: Wang, Wei
name: Xu, Ji
name: Zhang, Qi-An
name: Zhao, Shuai
name: Zhao, Yong
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The $x$-dependence of light-cone distribution amplitude (LCDA) can be directly calculated from a quasi distribution amplitude (DA) in lattice QCD within the framework of large-momentum effective theory (LaMET). In this paper, we study the one-loop renormalization of the quasi-DA in the regularization-independent momentum subtraction (RI/MOM) scheme. The renormalization factor for the quasi parton distribution function can be used to renormalize the quasi-DA provided that they are implemented on lattice and in perturbation theory in the same manner. We derive the one-loop matching coefficient that matches quasi-DA in the RI/MOM scheme onto LCDA in the $\overline{\rm MS}$ scheme. Our result provides the crucial step to extract the LCDAs from lattice matrix elements of quasi-DAs.
description: 7 pages, 0 figures
Engertia amboinae
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Engertia
Engertia amboinae

description: Engertia amboinae (Brenske, 1897)
 Phila amboinae Brenske, 1897: 111.
 Material. 1 female, Indonesia, Papua, Yapen I., northern coast, Rosbori village, at light, 14.11.2012, A. M. Prokofiev leg.; 1 isolated elyton, Miosindi Islet between Biak and Yapen Is., on sea coast, 15.11.2012, A. M. Prokofiev leg.
 Remarks. Five known species of Engertia Dalla Torre, 1912 are distributed in the Philippines, Sri Lanka, southern Moluccas, and New Guinea (Keith 2006). Surprisingly, the Schouten specimens represent not E. papuana (Moser, 1913) known from the main island of New Guinea, but E. amboinae which has been known hitherto only from Ambon I. (Keith 2006). The females of E. amboinae can be distinguished easily from those of E. papuana by the shape and density of the scales on the elytra which are larger, ovate, and more numerous and more closely packed in contrast to the sparse lanceolate scales of E. papuana (Figs 1–2). Both Schouten specimens agree well in this character with the type of E. amboinae (cf. Keith 2006). The third Indo-Australian species of this genus, E. setifera (Moser, 1913), can be easily distinguished by the presence of setae instead of scales on the elytra (Fig. 3). The Yapen I. and Miosindi Islet records greatly extend the known distribution of this species, which is probably widely distributed in eastern Indonesia.
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 73, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
Magnetic Field resulting from non-linear electrical transport in single crystals of charge-ordered Pr$_{0.63}$ Ca$_{0.37}$ MnO$_{3}$}
Creators: name: Guha, Ayan
name: Khare, N.
name: Raychaudhuri, A. K.
name: Rao, C. N. R
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this letter we report that the current induced destabilization of the charge ordered (CO) state in a rare-earth manganite gives rise to regions with ferromagnetic correlation. We did this experiment by measurement of the I-V curves in single crystal of the CO system Pr$_{0.63}$Ca$_{0.37}$MnO$_{3}$ and simultanously measuring the magnetization of the current carrying conductor using a high T$_c$ SQUID working at T = 77K. We have found that the current induced destabilization of the CO state leads to a regime of negative differential resistance which leads to a small enhancement of the magnetization of the sample, indicating ferromagnetically aligned moments.
description: 4 pages LateX, 4 eps figures
CONSTRUIINDO ARQUITETURA DA INFORMAÇÃO PERVASIVA NO REPOSITÓRIO - PIBIC.pdf
Creators: name: Pollyanna Batista Maia Alves
Publisher: name: figshare
Year: 2019
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: A presente pesquisa, construída a partir da articulação conceitual entre a Ciência da Informação, a Arquitetura da Informação e os Institutos Institucionais, busca responder ao seguinte questionamento: De que modo a Arquitetura da Informação Pervasiva pode ser empregada no âmbito dos Repositórios Institucionais? Assim, este estudo, de abordagem qualitativa, foi construído teoricamente por meio de uma investigação bibliográfica, exploratória e descritiva. Desse modo, uma pesquisa sobre estratégia em duas etapas, um estudo realizado sobre uma revisão de literatura para a composição da teoria e conceitos sobre a Arquitetura da Informação e os Institutos Institucionais (RI), tencionando os debates aqui. assinalados. Em seguida, empreendicionamento de uma coleta de dados por meio de uma entrevista semiestruturada com a ajuda do setor de Repositório Eletrônico da Universidade Federal da Paraíba (UFPB), com o objetivo de obter informações mais detalhadas sobre o tema. Os pressupostos teóricos da AIP no contexto do repositório foram, acabaram por se tornar uma unidade de informação e os problemas relacionados com a AIP. Conclui que os RI compreendem uma estrutura ecológica diversificada que contribui para uma aplicação da AIP, todavia não possibilita em sua totalidade uma movimentação, disseminação, infiltração e difusão de seus elementos dentro da ecologia.
Recovery of material parameters in transversely isotropic media
Creators: name: de Hoop, Maarten V.
name: Uhlmann, Gunther
name: Vasy, Andras
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 35R30 (primary), 53C65, 35A17, 35S05, 53B40

description: In this paper we show that in anisotropic elasticity, in the particular case of transversely isotropic media, under appropriate convexity conditions, knowledge of the qSH wave travel times determines the tilt of the axis of isotropy as well as some of the elastic material parameters, and the knowledge of qP and qSV travel times conditionally determines a subset of the remaining parameters, in the sense if some of the remaining parameters are known, the rest are determined, or if the remaining parameters satisfy a suitable relation, they are all determined, under certain non-degeneracy conditions. Furthermore, we give a precise description of the additional issues, which are a subject of ongoing work, that need to be resolved for a full treatment.
description: 22 pages; minor changes: some signs in Lemma 3.2 fixed
Detection of magnetic dipole lines of Fe XII in the ultraviolet spectrum of the dwarf star Epsilon Eri
Creators: name: Jordan, C.
name: McMurry, A. D.
name: Sim, S. A.
name: Arulvel, M.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report observations of the dwarf star Epsilon Eri (K2 V) made with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST). The high sensitivity of the STIS instrument has allowed us to detect the magnetic dipole transitions of Fe XII at 1242.00A and 1349.38A for the first time in a star other than the Sun. The width of the stronger line at 1242.00A has also been measured; such measurements are not possible for the permitted lines of Fe XII in the extreme ultraviolet. To within the accurcy of the measurements, the N V and the Fe XII lines occur at their rest wavelengths. Electron densities and line widths have been measured from other transition region lines. Together, these can be used to investigate the non-thermal energy flux in the lower and upper transition region, which is useful in constraining possible heating processes. The Fe XII lines are also present in archival STIS spectra of other G/K-type dwarfs.
description: 12 pages, 4 figures, submitted to MNRAS letters (11 Jan 2001)
Massive skyrmions in quantum Hall ferromagnets
Creators: name: Abolfath, M.
name: Mullen, Kieran
name: Stoof, H. T. C.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We apply the theory of elasticity to study the effects of skyrmion mass on lattice dynamics in quantum Hall systems. We find that massive Skyrme lattices behave like a Wigner crystal in the presence of a uniform perpendicular magnetic field. We make a comparison with the microscopic Hartree-Fock results to characterize the mass of quantum Hall skyrmions at $ν=1$ and investigate how the low temperature phase of Skyrme lattices may be affected by the skyrmion mass.
description: 6 pages and 2 figures
No Tradeoff between Coherence and Sub-Poissonianity for Heisenberg-Limited Lasers
Creators: name: Ostrowski, L. A.
name: Baker, T. J.
name: Saadatmand, S. N.
name: Wiseman, H. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Heisenberg limit to laser coherence $\mathfrak{C}$ -- the number of photons in the maximally populated mode of the laser beam -- is the fourth power of the number of excitations inside the laser. We generalize the previous proof of this upper bound scaling by dropping the requirement that the beam photon statistics be Poissonian (i.e., Mandel's $Q=0$). We then show that the relation between $\mathfrak{C}$ and sub-Poissonianity ($Q<0$) is win-win, not a tradeoff. For both regular (non-Markovian) pumping with semi-unitary gain (which allows $Q\xrightarrow{}-1$), and random (Markovian) pumping with optimized gain, $\mathfrak{C}$ is maximized when $Q$ is minimized.
description: This is a companion letter to the manuscript entitled "Optimized Laser Models with Heisenberg-Limited Coherence and Sub-Poissonian Beam Photon Statistics", arxiv:2208.14082. 6 pages, 2 figures
Introduction to spherical field theory
Creators: name: Lee, Dean
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Spherical field theory is a new non-perturbative method for studying quantum field theories. It uses the spherical partial wave expansion to reduce a general d-dimensional Euclidean field theory into a set of coupled one-dimensional systems. The coupled one-dimensional systems are then converted to partial differential equations and solved numerically. We demonstrate the methods of spherical field theory by analyzing Euclidean phi^4 theory in two dimensions.
Statistics-tuned phases of pseudofermions in one dimension
Creators: name: Agarwala, Adhip
name: Gupta, Gaurav Kumar
name: Shenoy, Vijay B.
name: Bhattacharjee, Subhro
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that a quadratic system of pseudofermions, with tunable fractionalised statistics, can host a rich phase diagram on a one dimensional chain with nearest and next nearest neighbor hopping. Using a combination of numerical and analytical techniques, we show that that by varying the statistical angle and the ratio of the hopping, the system stabilizes two Tomonaga-Luttinger liquids (TLL) with central charges c = 1 and 2 respectively along with the inversion symmetry broken bond ordered (BO) insulating phase. Interestingly, the two quantum phase transitions in the system - (1) between the two TLLs, and, (2) the c = 1 TLL and BO phase can be engendered by solely tuning the statistics of the pseudofermions. Our analysis shows that both these transition are continuous and novel with the former lacking a local order-parameter based description and the latter of Berezinskii-Kosterlitz-Thouless type. These phases and phase transitions can be of direct experimental relevance in context of recent studies of fermionic cold atoms.
description: 6+12 pages, 4+14 figures
On the origin of Gamma Ray Burst radiation
Creators: name: Ghisellini, G.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the standard internal shock model, the observed X and gamma-ray radiation is assumed to be produced by synchrotron emission. I will show that there are serious problems with this interpretation, calling for other radiation mechanisms, such as quasi-thermal Comptonization and/or Compton drag processes, or both. These new ideas can have important consequences on the more general internal shock scenario, and can be tested by future observations.
description: 8 pages, 1 figure, talk at the "IX Marcel Grossmann" meeting, Rome, Italy, July 2000
Extended stellar systems in the solar neighborhood - III. Like ships in the night: the Coma Berenices neighbor moving group
Creators: name: Fürnkranz, Verena
name: Meingast, Stefan
name: Alves, João
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of a kinematically cold group of stars, located in the immediate neighborhood of the well-known star cluster Coma Berenices (Mel 111). The new group identified in tangential velocity space as measured by Gaia contains at least 177 coeval members distributed in two subgroups, and appears as a flattened structure parallel to the plane, stretching for about 50 pc. More remarkably, the new group, which appears to have formed about 300 Myr later than Mel 111 in a different part of the Galaxy, will share essentially the same volume with the older cluster when the centers of both groups will be at their closest in 13 Myr. This will result in the mixing of two unrelated populations with different metallicities. The phase of cohabitation for these two groups is about 20-30 Myr, after which the two populations will drift apart. We estimate that temporal cohabitation of such populations is not a rare event in the disk of the Milky Way, and of the order of once per Galactic revolution. Our study also unveils the tidal tails of the Mel 111 cluster.
description: Accepted by A&A on March 12, 2019; A paper with similar content (arXiv:1902.01404) has been submitted a few days earlier. Our work was done independently and we obtain similar results, albeit with different techniques
Optimized Laser Models with Heisenberg-Limited Coherence and Sub-Poissonian Beam Photon Statistics
Creators: name: Ostrowski, L. A.
name: Baker, T. J.
name: Saadatmand, S. N.
name: Wiseman, H. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Recently it has been shown that it is possible for a laser to produce a stationary beam with a coherence (quantified as the mean photon number at spectral peak) which scales as the fourth power of the mean number of excitations stored within the laser, this being quadratically larger than the standard or Schawlow-Townes limit [1]. Moreover, this was analytically proven to be the ultimate quantum limit (Heisenberg limit) scaling under defining conditions for CW lasers, plus a strong assumption about the properties of the output beam. In Ref. [2], we show that the latter can be replaced by a weaker assumption, which allows for highly sub-Poissonian output beams, without changing the upper bound scaling or its achievability. In this Paper, we provide details of the calculations in Ref. [2], and introduce three new families of laser models which may be considered as generalizations of those presented in that work. Each of these families of laser models is parameterized by a real number, $p$, with $p=4$ corresponding to the original models. The parameter space of these laser families is numerically investigated in detail, where we explore the influence of these parameters on both the coherence and photon statistics of the laser beams. Two distinct regimes for the coherence may be identified based on the choice of $p$, where for $p>3$, each family of models exhibits Heisenberg-limited beam coherence, while for $p<3$, the Heisenberg limit is no longer attained. Moreover, in the former regime, we derive formulae for the beam coherence of each of these three laser families which agree with the numerics. We find that the optimal parameter is in fact $p\approx4.15$, not $p=4$.
description: This is a companion manuscript to the letter entitled "No Tradeoff between Coherence and Sub-Poissonianity for Heisenberg-Limited Lasers", arxiv:2208.14081. 22 pages, 11 figures
Liquid-Solid Transition of Hard Spheres Under Gravity
Creators: name: Quinn, Paul V.
name: Hong, Daniel C.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We investigate the liquid-solid transition of two dimensional hard spheres in the presence of gravity. We determine the transition temperature and the fraction of particles in the solid regime as a function of temperature via Even-Driven molecular dynamics simulations and compare them with the theoretical predictions. We then examine the configurational statistics of a vibrating bed from the view point of the liquid-solid transition by explicitly determining the transition temperature and the effective temperature, T, of the bed, and present a relation between T and the vibration strength.
description: 14 total pages, 4 figures
When Robotics Meets Wireless Communications: An Introductory Tutorial
Creators: name: Licea, Daniel Bonilla
name: Ghogho, Mounir
name: Saska, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The importance of ground Mobile Robots (MRs) and Unmanned Aerial Vehicles (UAVs) within the research community, industry, and society is growing fast. Many of these agents are nowadays equipped with communication systems that are, in some cases, essential to successfully achieve certain tasks. In this context, we have begun to witness the development of a new interdisciplinary research field at the intersection of robotics and communications. This research field has been boosted by the intention of integrating UAVs within the 5G and 6G communication networks. This research will undoubtedly lead to many important applications in the near future. Nevertheless, one of the main obstacles to the development of this research area is that most researchers address these problems by oversimplifying either the robotics or the communications aspect. This impedes the ability of reaching the full potential of this new interdisciplinary research area. In this tutorial, we present some of the modelling tools necessary to address problems involving both robotics and communication from an interdisciplinary perspective. As an illustrative example of such problems, we focus in this tutorial on the issue of communication-aware trajectory planning.
description: 35 pages, 192 references
Lepidiota reuleauxi Brenske 1892
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Lepidiota
Lepidiota reuleauxi

description: Lepidiota reuleauxi Brenske, 1892
 Lepidiota reuleauxi Brenske, 1892: 49.
 Material. 4 males, 4 females, Indonesia, Papua, Yapen I., northern coast, Rosbori village, black light, 13– 14.11.2012, A. M. Prokofiev leg.
 Remarks. This species is widely distributed in Papua New Guinea, where it is known as a sugarcane pest (Allsopp 1990). However, it was not hitherto known in Indonesian Papua. Lepidiota reuleauxi was common in the disturbed margins of a primary forest on Yapen I. and seems likely to be widely distributed in the whole New Guinean region. The present specimens show some variability in the outlines of the dorsal processes of the male parameres and have slightly deeper and shorter parameres in lateral view than specimens from Papua New Guinea (Heller 1914; Allsopp 1990). The females have a somewhat longer and stronger transverse subapical crest on the pygidium and a less deep but much narrower impression below it than Allsopp (1990: fig. 3) illustrated. Most probably these differences reflect inter-population variability.
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 73, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
Harmonic generation by metal nanostructures optically coupled to 2D transition metal dichalcogenide
Creators: name: Drobnyh, Elena
name: Pachter, Ruth
name: Sukharev, Maxim
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Rigorous electrodynamical simulations based on the nonlinear Drude model are performed to investigate the influence of strong coupling on high harmonic generation by periodic metal gratings. It is shown that a thin dispersive material with a third order nonlinearity strongly coupled to surface plasmon-polaritons significantly affects even harmonics generated solely by the metal. The physical nature of this effect is explained using a simple analytical model and further supported by numerical simulations. Furthermore, the behavior of the second and third harmonics is investigated as a function of various physical parameters of the model material system, revealing highly complex dynamics. The nonlinear optical response of 2D few-layer WS2 with both second and third order susceptibilities coupled to a periodic plasmonic grating is shown to have a significant effect on the second harmonic generation of the metal.
description: submitted to Journal of Physical Chemistry A
Service Provider Guide to Registering a Public API Client
Creators: name: Alainna Therese Wrigley
Publisher: name: ORCID
Year: 2019
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: This is a template guide that can be adapted and used by ORCID service providers to help non-ORCID member organizations (research institutions, publishers, societies, other) that need to register an ORCID Public API client to use the ORCID Public API to obtain authenticated ORCID iDs.
Numerical simulations of the Accretion-Ejection Instability in magnetised accretion disks
Creators: name: Caunt, S. E.
name: Tagger, M.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Accretion-Ejection Instability (AEI) described by Tagger & Pellat (1999) is explored numerically using a global 2d model of the inner region of a magnetised accretion disk. The disk is initially currentless but threaded by a vertical magnetic field created by external currents, and frozen in the flow. In agreement with the theory a spiral instability, similar in many ways to those observed in self-gravitating disks, develops when the magnetic field is, within a factor of a few, at equipartition with the disk thermal pressure. Perturbations in the flow build up currents and create a perturbed magnetic field within the disk. The present non-linear simulations give good evidence that such an instability can occur in the inner region of accretion disks, and generate accretion of gas and vertical magnetic flux toward the central object, if the equilibrium radial profiles of density and magnetic flux exceed a critical threshold.
description: single tar file with GIF figures
Product line optimisation based on semiparametric choice model
Creators: name: Qi, Wei
name: Luo, Xinggang
name: Yu, Yang
name: Tang, Jiafu
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified

description: Consumer choice behaviour is important in the product line optimisation problem. The extant literature on product line optimisation is mostly based on traditional consumer choice models, such as the multinomial logit and multinomial probit models. These models either assume that the utility errors are independent from irrelevant alternatives (IIA) or are limited by complex calculation processes or pre-given, specific distributions of measuring errors. The marginal moment model (MMM), which is classified as a semiparametric choice model, does not require specific distributions of errors; thus, it can overcome the IIA shortcoming. This study focuses on the concavity of the profit functions of a product line optimisation model based on MMM. We prove that the profit function based on MMM is concave in market share under a monopoly or oligopoly. Numerical experiments show that the choice probabilities obtained from the MMM, multinomial logit, and multinomial probit models are similar although they are obtained under different assumptions. Experimental results under monopolistic, Cournot, and Bertrand competition based on MMM are compared. Some interesting managerial insights are summarised based on the sensitivity analysis of the various model parameters.
Onset of secondary instabilities and plasma heating during magnetic reconnection in strongly magnetized regions of the low solar atmosphere
Creators: name: Ni, Lei
name: Lukin, Vyacheslav S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We numerically study magnetic reconnection on different spatial scales and at different heights in the weakly ionized plasma of the low solar atmosphere (around $300-800$~km above the solar surface) within a reactive 2.5 D multi-fluid plasma-neutral model. We consider a strongly magnetized plasma ($β\sim 6\% $) evolving from a force-free magnetic configuration and perturbed to initialize formation of a reconnection current sheet. On large scales, the resulting current sheets are observed to undergo a secondary 'plasmoid' instability. A series of simulations at different scales demonstrate a cascading current sheet formation process that terminates for current sheets with width of ~2m and length of $\sim100$~m, corresponding to the critical current sheet aspect ratio of $\sim50$. We also observe that the plasmoid instability is the primary physical mechanism accelerating the magnetic reconnection in this plasma parameter regime. After plasmoid instabilities appear, the reconnection rate sharply increases to a value of $\sim$ 0.035, observed to be independent of the Lundquist number. These characteristics are very similar to magnetic reconnection in fully ionized plasmas. In this low $β$ guide field reconnection regime, both the recombination and collisionless effects are observed to have a small contribution to the reconnection rate. The simulations show that it is difficult to heat the dense weakly ionized photospheric plasmas to above $2\times10^4$~K during the magnetic reconnection process. However, the plasmas in the low solar chromosphere can be heated above $3\times10^4$~K with reconnection magnetic fields of $500$~G or stronger.
Guide to Pre-filling Member API Credentials Request Forms
Creators: name: Alainna Therese Wrigley
Publisher: name: ORCID
Year: 2019
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: This is a guide for service providers wishing to help organizations create Member API credentials on the ORCID Sandbox testing server or production server, where they have the exact details needed in order to plug into the service provider system and use the ORCID API.
A model of semimetallic behavior in strongly correlated electron systems
Creators: name: Blawid, Stefan
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Metals with values of the resistivity and the Hall coefficient much larger than typical ones, e.g., of sodium, are called semimetals. We suggest a model for semimetals which takes into account the strong Coulomb repulsion of the charge carriers, especially important in transition-metal and rare-earth compounds. For that purpose we extend the Hubbard model by coupling one additional orbital per site via hybridization to the Hubbard orbitals. We calculate the spectral function, resistivity and Hall coefficient of the model using dynamical mean-field theory. Starting from the Mott-insulating state, we find a transition to a metal with increasing hybridization strength (``self-doping''). In the metallic regime near the transition line to the insulator the model shows semimetallic behavior. We compare the calculated temperature dependence of the resistivity and the Hall coefficient with the one found experimentally for $\rm Yb_4As_3$. The comparison demonstrates that the anomalies in the transport properties of $\rm Yb_4As_3$ possibly can be assigned to Coulomb interaction effects of the charge carriers not captured by standard band structure calculations.
description: 9 pages RevTeX with 7 ps figures, accepted by PRB
Deciphering structural and magnetic disorder in the chiral skyrmion host materials Co$_x$Zn$_y$Mn$_z$ ($x+y+z=20$)
Creators: name: Bocarsly, Joshua D.
name: Heikes, Colin
name: Brown, Craig M.
name: Wilson, Stephen D.
name: Seshadri, Ram
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Co$_x$Zn$_y$Mn$_z$ ($x+y+z=20$) compounds crystallizing in the chiral $β$-Mn crystal structure are known to host skyrmion spin textures even at elevated temperatures. As in other chiral cubic skyrmion hosts, skyrmion lattices in these materials are found at equilibrium in a small pocket just below the magnetic Curie temperature. Remarkably, CoxZnyMnz compounds have also been found to host metastable non-equilibrium skyrmion lattices in a broad temperature and field range, including down to zero-field and low temperature. This behavior is believed to be related to disorder present in the materials. Here, we use neutron and synchrotron diffraction, density functional theory calculations, and DC and AC magnetic measurements, to characterize the atomic and magnetic disorder in these materials. We demonstrate that Co has a strong site-preference for the diamondoid 8c site in the crystal structure, while Mn tends to share the geometrically frustrated 12d site with Zn, due to its ability to develop a large local moment on that site. This magnetism-driven site specificity leads to distinct magnetic behavior for the Co-rich 8c sublattice and the Mn on the 12d sublattice. The Co-rich sublattice orders at high temperatures (compositionally tunable between 100K to 470K) with a moment around 1 $μ_B$/atom and maintains this order to low temperature. The Mn-rich sublattice holds larger moments (about 3 $μ_B$ which remain fluctuating below the Co moment ordering temperature. At lower temperature, the fluctuating Mn moments freeze into a reentrant disordered cluster-glass state with no net moment, while the Co moments maintain order. This two-sublattice behavior allows for the observed coexistence of strong magnetic disorder and ordered magnetic states such as helimagnetism and skyrmion lattices.
description: 17 pages, 10 figures
T_c for dilute Bose gases: beyond leading order in 1/N
Creators: name: Arnold, Peter
name: Tomasik, Boris
Publisher: name: arXiv
Year: 2000
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Baym, Blaizot, and Zinn-Justin have recently used the large N approximation to calculate the effect of interactions on the transition temperature of dilute Bose gases. We extend their calculation to next-to-leading-order in 1/N and find a relatively small correction of -26% to the leading-order result. This suggests that the large N approximation works surprisingly well in this application.
description: 21 pages, 7+1 figures; an embarassing factor of 2 has been corrected in the evaluation of one diagram, changing the previous +18% result for the NLO correction to -26%
X-Ray Line Profiles from Parameterized Emission Within an Accelerating Stellar Wind
Creators: name: Owocki, Stanley P.
name: Cohen, David H.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Motivated by recent detections by the XMM and Chandra satellites of X-ray line emission from hot, luminous stars, we present synthetic line profiles for X-rays emitted within parameterized models of a hot-star wind. The X-ray line emission is taken to occur at a sharply defined co-moving-frame resonance wavelength, which is Doppler-shifted by a stellar wind outflow parameterized by a `beta' velocity law, $v(r)=v_{\infty} (1-\R_{\ast}/r)^β$. Above some initial onset radius $R_o$ for X-ray emission, the radial variation of the emission filling factor is assumed to decline as a power-law in radius, $f(r) \sim r^{-q}$. The computed emission profiles also account for continuum absorption within the wind, with the overall strength characterized by a cumulative optical depth $τ_\ast$. In terms of a wavelength shift from line-center scaled in units of the wind terminal speed $v_{\infty}$, we present normalized X-ray line profiles for various combinations of the parameters $β$, $τ_\ast$, $q$ and $R_o$, and including also the effect of instrumental broadening as characterized by a Gaussian with a parameterized width $σ$. We discuss the implications for interpreting observed hot-star X-ray spectra, with emphasis on signatures for discriminating between ``coronal'' and ``wind-shock'' scenarios. In particular, we note that in profiles observed so far the substantial amount of emission longward of line center will be difficult to reconcile with the expected attenuation by the wind and stellar core in either a wind-shock or coronal model.
description: Submitted to Ap.J. 17 pages; includes 5 figures. Preprint also available at http://www.bartol.udel.edu/~owocki/preprints