cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perturbation Theory for Spin Ladders Using Angular-Momentum Coupled Bases
Creators: name: Piekarewicz, J.
name: Shepard, J. R.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute bulk properties of Heisenberg spin-1/2 ladders using Rayleigh-Schrödinger perturbation theory in the rung and plaquette bases. We formulate a method to extract high-order perturbative coefficients in the bulk limit from solutions for relatively small finite clusters. For example, a perturbative calculation for an isotropic $2\times 12$ ladder yields an eleventh-order estimate of the ground-state energy per site that is within 0.02% of the density-matrix-renormalization-group (DMRG) value. Moreover, the method also enables a reliable estimate of the radius of convergence of the perturbative expansion. We find that for the rung basis the radius of convergence is $λ_c\simeq 0.8$, with $λ$ defining the ratio between the coupling along the chain relative to the coupling across the chain. In contrast, for the plaquette basis we estimate a radius of convergence of $λ_c\simeq 1.25$. Thus, we conclude that the plaquette basis offers the only currently available perturbative approach which can provide a reliable treatment of the physically interesting case of isotropic $(λ=1)$ spin ladders. We illustrate our methods by computing perturbative coefficients for the ground-state energy per site, the gap, and the one-magnon dispersion relation.
description: 22 pages. 9 figures
Bosonic Crystalline Symmetry Protected Topological Phases Beyond the Group Cohomology Proposal
Creators: name: Song, Hao
name: Xiong, Charles Zhaoxi
name: Huang, Sheng-Jie
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It is demonstrated by explicit construction that three-dimensional bosonic crystalline symmetry protected topological (cSPT) phases are classified by $H_ϕ^{5}(G;\mathbb{Z})\oplus H_ϕ^{1}(G;\mathbb{Z})$ for all 230 space groups $G$, where $H^n_ϕ(G;\mathbb{Z})$ denotes the $n$th twisted group cohomology of $G$ with $\mathbb{Z}$ coefficients, and $ϕ$ indicates that $g\in G$ acts non-trivially on coefficients by sending them to their inverses if $g$ reverses spacetime orientation and acts trivially otherwise. The previously known summand $H_ϕ^{5}(G;\mathbb{Z})$ corresponds only to crystalline phases built without the $E_8$ state or its multiples on 2-cells of space. It is the crystalline analogue of the "group cohomology proposal" for classifying bosonic symmetry protected topological (SPT) phases, which takes the form $H_ϕ^{d+2}(G;\mathbb{Z})\cong H_ϕ^{d+1}(G;U(1))$ for finite internal symmetry groups in $d$ spatial dimensions. The new summand $H_ϕ^{1}(G;\mathbb{Z})$ classifies possible configurations of $E_8$ states on 2-cells that can be used to build crystalline phases beyond the group cohomology proposal. The completeness of our classification and the physical meaning of $H_ϕ^{1}(G;\mathbb{Z})$ are established through a combination of dimensional reduction, surface topological order, and explicit cellular construction. The value of $H_ϕ^{1}(G;\mathbb{Z})$ can be easily read off from the international symbol for $G$. Our classification agrees with the prediction of the "generalized cohomology hypothesis," which concerns the general structure of the classification of SPT phases, and therefore provides strong evidence for the validity of the said hypothesis in the realm of crystalline symmetries.
description: revtex4 file, color figures, HS and CZX are co-first-authors
Statistical Mechanics of 2+1 Gravity From Riemann Zeta Function and Alexander Polynomial:Exact Results
Creators: name: Kholodenko, Arkady L.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the recent publication (Journal of Geometry and Physics,33(2000)23-102) we demonstrated that dynamics of 2+1 gravity can be described in terms of train tracks. Train tracks were introduced by Thurston in connection with description of dynamics of surface automorphisms. In this work we provide an example of utilization of general formalism developed earlier. The complete exact solution of the model problem describing equilibrium dynamics of train tracks on the punctured torus is obtained. Being guided by similarities between the dynamics of 2d liquid crystals and 2+1 gravity the partition function for gravity is mapped into that for the Farey spin chain. The Farey spin chain partition function, fortunately, is known exactly and has been thoroughly investigated recently. Accordingly, the transition between the pseudo-Anosov and the periodic dynamic regime (in Thurston's terminology) in the case of gravity is being reinterpreted in terms of phase transitions in the Farey spin chain whose partition function is just a ratio of two Riemann zeta functions. The mapping into the spin chain is facilitated by recognition of a special role of the Alexander polynomial for knots/links in study of dynamics of self homeomorphisms of surfaces. At the end of paper, using some facts from the theory of arithmetic hyperbolic 3-manifolds (initiated by Bianchi in 1892), we develop systematic extension of the obtained results to noncompact Riemannian surfaces of higher genus. Some of the obtained results are also useful for 3+1 gravity. In particular, using the theorem of Margulis, we provide new reasons for the black hole existence in the Universe: black holes make our Universe arithmetic. That is the discrete Lie groups of motion are arithmetic.
description: 69 pages,11 figures. Journal of Geometry and Physics (in press)
Oscillations of algal cell quota: Considering two-stage phosphate uptake 2 kinetics
Creators: Shen, Anglu
Gao, Shufei
Jiang, Jie
Hu, Qingjing
Wang, Hao
Yuan, Sanling
Publisher: name: University of Alberta Library
Year: 2024

Abstract from Author:

"Elucidating the mechanism of effect of phosphate (PO43−) uptake on the growth of algal cells helps understand the frequent outbreaks of algal blooms caused by eutrophication. In this study, we develop a comprehensive mathematical model that incorporates two stages of PO43− uptake and accounts for transport time delay. The model parameter values are determined by fitting experimental data of Prorocentrum donghaiense and the model is validated using experimental data of Karenia mikimotoi. The numerical results demonstrate that the model successfully captures the general characteristics of algal growth and PO43− uptake under PO43− sufficient conditions. Significantly, the experimental and mathematical findings suggest that the time delay associated with the transfer of PO43− from the surface-adsorbed PO43− (Ps) pool to the intracellular PO43− (Pi) pool may serve as a physiologically plausible mechanism leading to oscillations of algal cell quota. These results have important implications for resource managers, enabling them to predict and deepen their understanding of harmful algal blooms."
title: Υπολογισμός και Προοπτική Απεικόνιση Θέσεων λιμνοδεξαμενών με παγκόσμια ψηφιακά μοντέλα εδάφους
titleType: AlternativeTitle
Creators: name: Papadakis, Loukas M.
Publisher: name: National Technological University of Athens
Year: 2013
Subjects: Λιμνοδεξαμενές
Ψηφιακά μοντέλα εδάφους
Υπολογιστικός κώδικας
Προοπτική απεικόνιση
Reservoirs
Global digital elevation model
Fortran
Fortran code
Perspective depiction

description: 133 σ.
description: Σκοπός της παρούσας εργασίας είναι η χρήση του παγκόσμιου ψηφιακού μοντέλου εδάφους SRTM (Shuttle Radar Topography Mission) για τον υπολογισμό θέσεων λιμνοδεξαμενών στην περιοχή της Ελλάδας, καθώς και για την προοπτική απεικόνισή τους. Αναπτύχθηκαν τέσσερις μέθοδοι για την επεξεργασία των δεδομένων του SRTM και κατασκευάστηκαν προγράμματα H/Y σε γλώσσα FORTRAN για την εφαρμογή αυτών των μεθόδων. Μετά τον υπολογισμό ικανοποιητικού αριθμού θέσεων πιθανών λιμνοδεξαμενών, ακολούθησε ο εντοπισμός τους στο χάρτη, χρησιμοποιώντας το πρόγραμμα Google earth, καθώς και η προοπτική απεικόνιση των θέσεων αυτών με χρήση των δεδομένων του SRTM.
description: The purpose of this thesis is the use of Global Digital Elevation project SRTM (Shuttle Radar Topography Misiion) to locate small reservoirs in the region of Greece. Four methods were developed for the processing of the STRM data using FORTRAN code. Following the calculation of a sufficient number of possible places, their location on the map was found, using Google Earth. Afterwards, the above locations were perspectively depicted using the STRM data.
Velocity field distributions due to ideal line vortices
Creators: name: Levi, Thomas S.
name: Montgomery, David C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We evaluate numerically the velocity field distributions produced by a bounded, two-dimensional fluid model consisting of a collection of parallel ideal line vortices. We sample at many spatial points inside a rigid circular boundary. We focus on ``nearest neighbor'' contributions that result from vortices that fall (randomly) very close to the spatial points where the velocity is being sampled. We confirm that these events lead to a non-Gaussian high-velocity ``tail'' on an otherwise Gaussian distribution function for the Eulerian velocity field. We also investigate the behavior of distributions that do not have equilibrium mean-field probability distributions that are uniform inside the circle, but instead correspond to both higher and lower mean-field energies than those associated with the uniform vorticity distribution. We find substantial differences between these and the uniform case.
description: 21 pages, 9 figures. To be published in Physical Review E (http://pre.aps.org/) in May 2001
Additional file 8 of Comparative analysis and supragenome modeling of twelve Moraxella catarrhalis clinical isolates
Creators: name: Davie, Jeremiah J
name: Earl, Josh
name: Vries, Stefan PW De
name: Ahmed, Azad
name: Hu, Fen Z
name: Bootsma, Hester J
name: Stol, Kim
name: Hermans, Peter WM
name: Wadowsky, Robert M
name: Ehrlich, Garth D
name: Hays, John P
name: Campagnari, Anthony A
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Authors’ original file for figure 6
Event generation for beam dump experiments
Creators: name: Buonocore, Luca
name: Frugiuele, Claudia
name: Maltoni, Fabio
name: Mattelaer, Olivier
name: Tramontano, Francesco
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A wealth of new physics models which are motivated by questions such as the nature of dark matter, the origin of the neutrino masses and the baryon asymmetry in the universe, predict the existence of hidden sectors featuring new particles. Among the possibilities are heavy neutral leptons, vectors and scalars, that feebly interact with the Standard Model (SM) sector and are typically light and long lived. Such new states could be produced in high-intensity facilities, the so-called beam dump experiments, either directly in the hard interaction or as a decay product of heavier mesons. They could then decay back to the SM or to hidden sector particles, giving rise to peculiar decay or interaction signatures in a far-placed detector. Simulating such kind of events presents a challenge, as not only short-distance new physics (hard production, hadron decays, and interaction with the detector) and usual SM phenomena need to be described but also the travel has to be accounted for as determined by the geometry of the detector. In this work, we describe a new plugin to the {\sc MadGraph5\_aMC@NLO} platform, which allows the complete simulation of new physics processes relevant for beam dump experiments, including the various mechanisms for the production of hidden particles, namely their decays or scattering off SM particles, as well as their far detection, keeping into account spatial correlations and the geometry of the experiment.
description: LaTeX, 42 pages, 14 figures
Lithomelissa trifoliolata Funakawa 1995
Creators: name: Trubovitz, Sarah
name: Renaudie, Johan
name: Lazarus, David
name: Noble, Paula
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Chromista
Radiozoa
Polycystina
Nassellaria
Plagiacanthidae
Lithomelissa
Lithomelissa trifoliolata

description: Lithomelissa trifoliolata Funakawa, 1995a
 Clathrolychnus sp., Sugiyama, 1994, pl. 2, figs. 3A–B.
 Lithomelissa trifoliolata n. sp., Funakawa, 1995a, pl. 10, figs. 3A–4C; text-fig. 9.
description: Published as part of Trubovitz, Sarah, Renaudie, Johan, Lazarus, David & Noble, Paula, 2022, Late Neogene Lophophaenidae (Nassellaria, Radiolaria) from the eastern equatorial Pacific, pp. 1-158 in Zootaxa 5160 (1) on page 50, DOI: 10.11646/zootaxa.5160.1.1, http://zenodo.org/record/10544058
Boundary Effects on the Angle of Repose in Rotating Cylinders
Creators: name: Dury, Christian M.
name: Ristow, Gerald H.
name: Moss, Jamie L.
name: Nakagawa, Masami
Publisher: name: arXiv
Year: 1997
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The angle of repose for the flow of granular materials in a half-filled rotating drum is studied by means of experiments and computer simulations. Particles of different material properties are used to investigate the effects of the end caps on the angle of repose. By fitting the numerical results to an exponentially decaying function, we are able to calculate the characteristic range, $ζ$, of the influence of the wall. We found that $ζ$ scales with the drum radius but does not depend on either the density or the gravitational constant. For increasing particle diameter, finite size effects are visible.
description: LaTeX, 7 pages with 10 figures (using provided EPIC and EEPIC macros)
Breathing Oscillations in a Global Simulation of a Thin Accretion Disk
Creators: name: Mishra, Bhupendra
name: Kluzniak, Wlodek
name: Fragile, P. Chris
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the oscillations of an axisymmetric, viscous, radiative, general relativistic hydrodynamical simulation of a geometrically thin disk around a non-rotating, $6.62\,M_\odot$ black hole. The numerical setup is initialized with a Novikov-Thorne, gas-pressure-dominated accretion disk, with an initial mass accretion rate of $\dot{m} = 0.01\,L_\mathrm{Edd}/c^2$ (where $L_\mathrm{Edd}$ is the Eddington luminosity and $c$ is the speed of light). Viscosity is treated with the $α$-prescription. The simulation was evolved for about $1000$ Keplerian orbital periods at three Schwarzschild radii (ISCO radius). Power density spectra of the radial and vertical fluid velocity components, the total (gas $+$ radiation) midplane pressure, and the vertical component of radiative flux from the photosphere, all reveal strong power at the local breathing oscillation frequency. The first, second and third harmonics of the breathing oscillation are also clearly seen in the data. We quantify the properties of these oscillations by extracting eigenfunctions of the radial and vertical velocity components and total pressure. This confirms that these oscillations are associated with breathing motion.
description: 10 pages, 6figures, submitted to MNRAS
Luminous and Variable Stars in NGC 2403 and M81
Creators: name: Humphreys, Roberta M.
name: Stangl, Sarah
name: Gordon, Michael S.
name: Davidson, Kris
name: Grammer, Skyler H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of spectroscopy and multi-wavelength photometry of luminous and variable star candidates in the nearby spiral galaxies NGC 2403 and M81. We discuss specific classes of stars, the Luminous Blue Variables (LBVs), B[e] supergiants (sgB[e]), and the high luminosity yellow hypergiants. We identify two new LBV candidates, and three sgB[e] stars in M81. We also find that some stars previously considered LBV candidates are actually field stars. The confirmed and candidate LBVs and sgB[e] stars together with the other confirmed members are shown on the HR Diagrams for their respective galaxies. We also present the HR Diagrams for the two "SN impostors", V37 (SN2002kg) and V12(SN1954J) in NGC 2403 and the stars in their immediate environments.
description: To appear in the Astronomical Journal
An unbiased spectral line survey observation toward the low-mass star-forming region L1527
Creators: name: Yoshida, Kento
name: Sakai, Nami
name: Nishimura, Yuri
name: Tokudome, Tomoya
name: Watanabe, Yoshimasa
name: Sakai, Takeshi
name: Takano, Shuro
name: Yamamoto, Satoshi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An unbiased spectral line survey toward a solar-type Class 0/I protostar, IRAS04368+2557, in L1527 has been carried out in the 3 mm band with the Nobeyama 45 m telescope. L1527 is known as a warm carbon-chain chemistry (WCCC) source, which harbors abundant unsaturated organic species such as C$_n$H ($n = 3,\ 4,\ 5,\ldots$) in a warm and dense region near the protostar. The observation covers the frequency range from 80 to 116 GHz. A supplementary observation has also been conducted in the 70 GHz band to observe fundamental transitions of deuterated species. In total, 69 molecular species are identified, among which 27 species are carbon-chain species and their isomers, including their minor isotopologues. This spectral line survey provides us with a good template of the chemical composition of the WCCC source.
description: published online in PASJ
Gas-phase structural isomer identification by Coulomb explosion of aligned molecules
Creators: name: Burt, Michael
name: Amini, Kasra
name: Lee, Jason W. L.
name: Christiansen, Lars
name: Johansen, Rasmus R.
name: Kobayashi, Yuki
name: Pickering, James D.
name: Vallance, Claire
name: Brouard, Mark
name: Stapelfeldt, Henrik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The gas-phase structures of four difluoroiodobenzene and two dihydroxybromobenzene isomers were identified by correlating the emission angles of atomic fragment ions created following femtosecond laser-induced Coulomb explosion. The structural determinations were facilitated by confining the most polarizable axis of each molecule to the detection plane prior to the Coulomb explosion event using one-dimensional laser-induced adiabatic alignment. For a molecular target consisting of two difluoroiodobenzene isomers, each constituent structure could additionally be singled out and distinguished.
description: 13 pages, 4 figures. Published as a communication in the Journal of Chemical Physics
Charged magnetoexcitons in two dimensions: Magnetic translations and families of dark states
Creators: name: Dzyubenko, A. B.
name: Sivachenko, A. Yu.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that optical transitions of charged excitons in semiconductor heterostructures are governed in magnetic fields by a novel exact selection rule, a manifestation of magnetic translations. It is shown that the spin-triplet ground state of the quasi-two-dimensional charged exciton X- --- a bound state of two electrons and one hole --- is optically inactive in photoluminescence at finite magnetic fields. Internal bound-to-bound X- triplet transition has a specific spectral position, below the electron cyclotron resonance, and is strictly prohibited in a translationally-invariant system. These results allow one to discriminate between localized and free charged excitons.
description: LaTeX, 4 pages, 2 figures, replaced with a revised version
Doping Dependence of the Pseudogap in La(2-x)Sr(x)CuO(4)
Creators: name: Naeini, J. G.
name: Chen, X. K.
name: Irwin, J. C.
name: Okuya, M.
name: Kimura, T.
name: Kishio, K.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the results of Raman scattering experiments on single crystals of La(2-x)Sr(x)CuO(4) that span the range from underdoped (x = 0.10) to overdoped (x =0.22). The spectra are consistent with the existence of a strong anisotropic quasiparticle interaction that results in a normal state depletion of spectral weight from regions of the Fermi surface located near the zone axes. The strength of the interaction decreases rapidly with increasing hole concentration and the spectral evidence for the pseudogap vanishes when the optimum doping level is reached. The results suggest that the pseudogap and superconducting gap arise from different mechanisms.
description: 7 pages, 6 eps figures, added new sections, figures, references
Myrcia insigniflora M. F. Santos 2014, nom. nov.
Creators: name: Mazine, Fiorella F.
name: Santos, Matheus Fortes
name: Lucas, Eve
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Magnoliopsida
Myrtales
Myrtaceae
Myrcia
Myrcia insigniflora

description: 2.4. Myrcia insigniflora M.F.Santos, nom. nov.
Replaced synonym: Marlierea glazioviana Kiaersk. (1893: 48).
Type:— BRAZIL. Rio de Janeiro, Glaziou 11998 (lectotype C (flowering branch)! here designated, isolectotypes C!, G!, K!, LE!, P!, R!).
Distribution:— Rio de Janeiro and São Paulo states.
Note:—A new name was necessary because Myrcia glazioviana Kiaersk. is already published (Kiaerskou 1893). The specific epithet refers to the unusual morphology of the floral parts: calyx lobes are fused and not clearly distinct, petals are coherent after anthesis resembling a calyptra, stamens are numerous (>200) and often persistent in the fruit. Kiaerskou (1893) based the description of Marlierea glazioviana on the collection Glaziou 11998 deposited in the herbarium C. Only these materials have the author´s handwriting in the label. Since there are two sheets of Glaziou 11998, we had to choose one of them as the lectotype; the two sheets are identified only by IDC microfiche number, one flowering branch no. 121 III 1 and a sheet with two leaves with no. 121 III 2. The flowering branch is represented in the protologue, and we choose this sheet as the lectotype.
description: Published as part of Mazine, Fiorella F., Santos, Matheus Fortes & Lucas, Eve, 2014, New combinations and new names in Myrcia (Myrtaceae) for Flora of São Paulo state, Brazil, pp. 97-100 in Phytotaxa 173 (1) on page 99, DOI: 10.11646/phytotaxa.173.1.12, http://zenodo.org/record/5149183
The coherent dynamics of photoexcited green fluorescent proteins
Creators: name: Cinelli, Riccardo A. G.
name: Tozzini, Valentina
name: Pellegrini, Vittorio
name: Beltram, Fabio
name: Cerullo, Giulio
name: Zavelani-Rossi, Margherita
name: De Silvestri, Sandro
name: Tyagi, Mudit
name: Giacca, Mauro
Publisher: name: arXiv
Year: 2001
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The coherent dynamics of vibronic wave packets in the green fluorescent protein is reported. At room temperature the non-stationary dynamics following impulsive photoexcitation displays an oscillating optical transmissivity pattern with components at 67 fs (497 cm-1) and 59 fs (593 cm-1). Our results are complemented by ab initio calculations of the vibrational spectrum of the chromophore. This analysis shows the interplay between the dynamics of the aminoacidic structure and the electronic excitation in the primary optical events of green fluorescent proteins.
description: accepted for publication in Physical Review Letters
Additional file 9 of Comparative analysis and supragenome modeling of twelve Moraxella catarrhalis clinical isolates
Creators: name: Davie, Jeremiah J
name: Earl, Josh
name: Vries, Stefan PW De
name: Ahmed, Azad
name: Hu, Fen Z
name: Bootsma, Hester J
name: Stol, Kim
name: Hermans, Peter WM
name: Wadowsky, Robert M
name: Ehrlich, Garth D
name: Hays, John P
name: Campagnari, Anthony A
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Authors’ original file for figure 7
Lithomelissa ultima Caulet 1979
Creators: name: Trubovitz, Sarah
name: Renaudie, Johan
name: Lazarus, David
name: Noble, Paula
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Chromista
Radiozoa
Polycystina
Nassellaria
Plagiacanthidae
Lithomelissa
Lithomelissa ultima

description: Lithomelissa ultima Caulet, 1979
 Lithomelissa ultima n. sp., Caulet, 1979, pl. 1, figs. 2–3.
 Lithomelissa ultima Caulet, Sugiyama et al., 1992, pl. 17, figs. 1A–B.
description: Published as part of Trubovitz, Sarah, Renaudie, Johan, Lazarus, David & Noble, Paula, 2022, Late Neogene Lophophaenidae (Nassellaria, Radiolaria) from the eastern equatorial Pacific, pp. 1-158 in Zootaxa 5160 (1) on page 50, DOI: 10.11646/zootaxa.5160.1.1, http://zenodo.org/record/10544058
Physics of nuclei: Key role of an emergent symmetry
Creators: name: Dytrych, T.
name: Launey, K. D.
name: Draayer, J. P.
name: Rowe, D.
name: Wood, J.
name: Rosensteel, G.
name: Bahri, C.
name: Langr, D.
name: Baker, R. B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Exact symmetry and symmetry-breaking phenomena play a key role in providing a better understanding of the physics of many-particle systems, from quarks and atomic nuclei, to molecules and galaxies. In atomic nuclei, exact and dominant symmetries such as rotational invariance, parity, and charge independence have been clearly established. However, even when these symmetries are taken into account, the structure of nuclei remains illusive and only partially understood, with no additional symmetries immediately evident from the underlying nucleon-nucleon interaction. Here, we show through ab initio large-scale nuclear structure calculations that the special nature of the strong nuclear force determines additional highly regular patterns in nuclei that can be tied to an emergent approximate symmetry. We find that this symmetry is remarkably ubiquitous, regardless of its particular strong interaction heritage, and mathematically tracks with a symplectic group. Specifically, we show for light to intermediate-mass nuclei that the structure of a nucleus, along with its low-energy excitations, respects symplectic symmetry at about 70-80% level, unveiling the predominance of only a few equilibrium shapes, deformed or not, with associated vibrations and rotations. This establishes the symplectic symmetry as a remarkably good symmetry of the strong nuclear force, in the low-energy regime. This may have important implications to studies in astrophysics and neutrino physics that rely on nuclear structure information, especially where experimental measurements are incomplete or not available. A very important practical advantage is that this new symmetry can be utilized to dramatically reduce computational resources required in ab initio large-scale nuclear structure modeling. This, in turn, can be used to pioneer predictions, e.g., for short-lived isotopes along various nucleosynthesis pathways.
description: 6 pages, 4 figures
Differential efficacy of genetically swapping GAL4
Creators: name: Chen, Ying-Jun
name: Hao-Hsin Chang
name: Shih-Han Lin
name: Tzi-Yang Lin
name: Ting-Han Wu
name: Hsin-Ju Lin
name: Nan-Fu Liou
name: Chi-Jen Yang
name: Yuh-Tarng Chen
name: Chang, Kai Hsiang
name: Cen-You Li
name: Chou, Ya-Hui
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Biotechnology
subject: Evolutionary Biology
subject: Ecology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 60506 Virology

description: Several large or mid-scale collections of Drosophila enhancer traps have been recently created to allow for genetic swapping of GAL4 coding sequences to versatile transcription activators or suppressors such as LexA, QF, split-GAL4 (GAL4-AD and GAL4-DBD), GAL80 and QS. Yet a systematic analysis of the feasibility and reproducibility of these tools is lacking. Here we focused on InSITE GAL4 drivers that specifically label different subpopulations of olfactory neurons, particularly local interneurons (LNs), and genetically swapped the GAL4 domain for LexA, GAL80 or QF at the same locus. We found that the major utility-limiting factor for these genetic swaps is that many do not fully reproduce the original GAL4 expression patterns. Different donors exhibit distinct efficacies for reproducing original GAL4 expression patterns. The successfully swapped lines reported here will serve as valuable reagents and expand the genetic toolkits of Drosophila olfactory circuit research.
Damping of low-energy excitations of a trapped Bose condensate at finite temperatures
Creators: name: Fedichev, P. O.
name: Shlyapnikov, G. V.
name: Walraven, J. T. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We present the theory of damping of low-energy excitations of a trapped Bose condensate at finite temperatures, where the damping is provided by the interaction of these excitations with the thermal excitations. We emphasize the key role of stochastization in the behavior of the thermal excitations for damping in non-spherical traps. The damping rates of the lowest excitations, following from our theory, are in fair agreement with the data of recent JILA and MIT experiments. The damping of quasiclassical excitations is determined by the condensate boundary region, and the result for the damping rate is drastically different from that in a spatially homogeneous gas.
description: 10 pages RevTeX, correction of the misprints and addition of the sentence clarifying the result for quasiclassical excitationscorrection of the misprints and addition of the sentence clarifying the result for quasiclassical excitations
Constraining the era of helium reionization using fast radio bursts
Creators: name: Caleb, M.
name: Flynn, C.
name: Stappers, B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The discovery of fast radio bursts (FRBs) about a decade ago opened up new possibilities for probing the ionization history of the Intergalactic Medium (IGM). In this paper we study the use of FRBs for tracing the epoch of HeII reionization, using simulations of their dispersion measures. We model dispersion measure contributions from the Milky Way, the IGM (homogeneous and inhomogeneous) and a possible host galaxy as a function of redshift and star formation rate. We estimate the number of FRBs required to distinguish between a model of the Universe in which helium reionization occurred at z = 3 from a model in which it occurred at z = 6 using a 2-sample Kolmogorov-Smirnoff test. We find that if the IGM is homogeneous >1100 FRBs are needed and that an inhomogeneous model in which traversal of the FRB pulse through galaxy halos increases the number of FRBs modestly, to >1600. We also find that to distinguish between a reionization that occurred at z = 3 or z = 3.5 requires ~5700 FRBs in the range 3 < z < 5.
description: Accepted for publication in MNRAS
Tilt waves dynamics of the oxygen octahedra in La2CuO4 from anelastic and 139La NQR relaxation
Creators: name: Cordero, F.
name: Cantelli, R.
name: Corti, M.
name: Campana, A.
name: Rigamonti, A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The anharmonic vibrational dynamics in nearly stoichiometric La2CuO4+delta is studied by means of anelastic and ^{139}La NQR relaxation. In the absorption component of the elastic susceptibility as well as in the nuclear relaxation rate a peak is detected as a function of temperature, and a relaxation time tau = 1.7 10^{-12} exp [(2800 K)/T] s is derived. The relaxation processes are attributed to tilt motion of the CuO6 octahedra in doublewell potentials, whose cooperative character increases the effective energy barrier to the observed value. The analysis of the relaxation mechanisms has been carried out by reducing the dynamics of the interacting octahedra to a one-dimensional equation of motion. The soliton-like solutions correspond to parallel walls separating domains of different tilt patterns and give rise to pseudo-diffusive modes which appear as a central component in the spectral density of the motion of the octahedra. The tilt waves may be considered to correspond to the dynamical lattice stripes observed in La-based and Bi-based high-Tc superconductors.
description: LaTeX, 3 PostScript figures, to be published in Phys. Rev. B
title: Σχεδίαση και ανάπτυξη ηλεκτροκινητήτων τύπου SRM
titleType: AlternativeTitle
Creators: name: Konstantopoulos, Christos V.
Publisher: name: National Technological University of Athens
Year: 2013
Subjects: Κινητήρας μεταβλητης μαγνήτισης
Ηλεκτρικός χάλυβας
Βρόχος υστέρησης
Switched reluctance motors
SRMs
Silicon steel
COMSOL Multiphysics
Hysterisis loop

description: 116 σ.
description: Η παρούσα διπλωματική εργασία πραγματεύεται τον σχεδιασμό και την κατασκευή ενός ηλεκτροκινητήρα με ταυτόχρονη μελέτη του υλικού από το οποίο απαρτίζονται τα σημαντικότερα τμήματα του ίδιου του ηλεκτροκινητήρα, δηλαδή, τον στάτη και τον δρομέα. Για τον σκοπό αυτό, η διπλωματική έπρεπε να χωριστεί σε μέρη. Αρχικά μελετήθηκε ο τρόπος διαστασιολόγησης του υλικού μας. Αφού παραλάβαμε το υλικό (ταινία πυριτιούχου χάλυβα) από την εταιρεία, παρατηρήσαμε ότι η ταινία χαρακτηριζόταν από πλάτος (0,074m) οπότε με αρχική αυτή τη διάσταση σχεδιάστηκε και ο υπόλοιπος κινητήρας. Στη συνέχεια το σχέδιο εισήχθη στο πρόγραμμα του COMSOL Multiphysics όπου και πραγματοποιήθηκε ο έλεγχος των πεπερασμένων στοιχείων σύμφωνα με τον ηλεκτροκινητήρα που υπήρχε στη βάση δεδομένων του ίδιου του προγράμματος. Ταυτόχρονα με τη μελέτη των πεπερασμένων στοιχείων, πραγματοποιήθηκε μικροδομικός χαρακτηρισμός και μελέτη των μαγνητικών ιδιοτήτων του υλικού τόσο στην κατάσταση στην οποία παραλήφθηκε (as received δοκίμιο) όσο και μετά από ισοθερμοκρασιακή ανόπτηση (400οC, 750οC, 950οC) για διάφορους χρόνους παραμονής. (30min, 1h, 2h). Τα δοκίμια αυτά στη συνέχεια μελετήθηκαν σε οπτικό μικροσκόπιο, XRD, και SEM. Ως προς την ποιοτική μελέτη των μαγνητικών ιδιοτήτων του υλικού, δημιουργήθηκαν κατάλληλα πηνία στις διαστάσεις των δοκιμίων για τη μέτρηση των βρόχων υστέρησης.
description: The goal of this dissertation was to develop a program to calculate the optimal components combination for an electric motor (stator and rotor). Initially, the main motor performance and efficiency specifications are prescribed. Subsequently, the design study is performed in order to enable all motor components to meet the specified technical standards. The design procedure which has been adopted in the present study is described.. It is a complex procedure which involves the initial design of the motor dimensions by means of corresponding theoretical equations and the utilization of computation tools for detailed field analysis such as finite elements methods. Finally, detailed metallurgical characterization of the material was undertaken to correlate with its mechanical and magnetic properties. The specimens were examined by light microscopy, XRD, and SEM
The phase of a quantum mechanical particle in curved spacetime
Creators: name: Alsing, P. M.
name: Evans, J. C.
name: Nandi, K. K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the quantum mechanical wave equations for free particles of spin 0,1/2,1 in the background of an arbitrary static gravitational field in order to explicitly determine if the phase of the wavefunction is $S/\hbar = \int p_μ dx^μ / \hbar$, as is often quoted in the literature. We work in isotropic coordinates where the wave equations have a simple managable form and do not make a weak gravitational field approximation. We interpret these wave equations in terms of a quantum mechanical particle moving in medium with a spatially varying effective index of refraction. Due to the first order spatial derivative structure of the Dirac equation in curved spacetime, only the spin 1/2 particle has \textit{exactly} the quantum mechanical phase as indicated above. The second order spatial derivative structure of the spin 0 and spin 1 wave equations yield the above phase only to lowest order in $\hbar$. We develop a WKB approximation for the solution of the spin 0 and spin 1 wave equations and explore amplitude and phase corrections beyond the lowest order in $\hbar$. For the spin 1/2 particle we calculate the phase appropriate for neutrino flavor oscillations.
description: 30 pages, no figures. Submitted to Gen.Rel.Grav 17 Oct 00
Fast-to-Alfvén mode conversion mediated by Hall current. II Application to the solar atmosphere
Creators: name: González-Morales, P. A.
name: Khomenko, E.
name: Cally, P. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Coupling between fast magneto-acoustic and Alfvén waves can be observe in fully ionized plasmas mediated by stratification and 3D geometrical effects. In Paper I, Cally & Khomenko (2015) have shown that in a weakly ionized plasma, such as the solar photosphere and chromosphere, the Hall current introduces a new coupling mechanism. The present study extends the results from Paper I to the case of warm plasma. We report on numerical experiments where mode transformation is studied using quasi-realistic stratification in thermodynamic parameters resembling the solar atmosphere. This redresses the limitation of the cold plasma approximation assumed in Paper I, in particular allowing the complete process of coupling between fast and slow magneto-acoustic modes and subsequent coupling of the fast mode to the Alfvén mode through the Hall current. Our results confirm the efficacy of the mechanism proposed in Paper I for the solar case. We observe that the efficiency of the transformation is a sensitive function of the angle between the wave propagation direction and the magnetic field, and of the wave frequency. The efficiency increases when the field direction and the wave direction are aligned for increasing wave frequencies. After scaling our results to typical solar values, the maximum amplitude of the transformed Alfvén waves, for a frequency of 1 Hz, corresponds to an energy flux (measured above the height of peak Hall coupling) of $\sim10^3$ $\rm W\,m^{-2}$, based on an amplitude of 500 $\rm m\,s^{-1}$ at $β=1$, which is sufficient to play a major role in both quiet and active region coronal heating.
ПРОФЕССИОНАЛ ТАЪЛИМ МУАССАСАЛАРИДА ЛОЙИҲАЛАРНИ МОЛИЯЛАШТИРИШ
Creators: name: Бозоров, Мансур
Publisher: name: Zenodo
Year: 2024

description: Ушбу мақолада профессионал таълим муассасаларида лойиҳаларни молиялаштиришнинг аҳамияти, механизмлари ва турли сармоялаштириш манбалари таҳлил қилинади. Хусусан, лойиҳаларни самарали молиялаштириш учун давлат маблағлари, хусусий сектор сармоялари ва халқаро грантлардан фойдаланиш имкониятлари ўрганилади. Профессионал таълим тизимининг ривожланиши учун молиялаштиришнинг мустаҳкам асослари зарурлиги таъкидланади.
Lithomelissa matschigarica Vituchin 1993
Creators: name: Trubovitz, Sarah
name: Renaudie, Johan
name: Lazarus, David
name: Noble, Paula
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Chromista
Radiozoa
Polycystina
Nassellaria
Plagiacanthidae
Lithomelissa
Lithomelissa matschigarica

description: Lithomelissa matschigarica Vituchin, 1993
 Lithomelissa matschigarica n. sp., Vituchin, 1993, pl. 29, figs. 14, 18.
 Lithomelissa matschigarica Vituchin, Tsoy and Shastina, 1999, pl. 34, fig. 9.
description: Published as part of Trubovitz, Sarah, Renaudie, Johan, Lazarus, David & Noble, Paula, 2022, Late Neogene Lophophaenidae (Nassellaria, Radiolaria) from the eastern equatorial Pacific, pp. 1-158 in Zootaxa 5160 (1) on page 49, DOI: 10.11646/zootaxa.5160.1.1, http://zenodo.org/record/10544058
Confinements regulate capillary instabilities of fluid threads
Creators: name: Chen, Xiaodong
name: Xue, Chundong
name: Hu, Gongqing
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the breakup of confined fluid threads at low flow rates to understand instability mechanisms. To determine the critical conditions between the earlier quasi-stable necking stage and the later unstable collapse stage, simulations and experiments are designed to operate at an extremely low flow rate. Critical mean radii at neck centres are identified by the stop-flow method for elementary microfluidic configurations. Analytical investigations reveal two distinct origins of capillary instabilities. One is the gradient of capillary pressure induced by the confinements of geometry and external flow, whereas the other is the competition between local capillary pressure and internal pressure determined by the confinements.
Some aspects of electronic topological transition in 2D system on a square lattice. Excitonic ordered states
Creators: name: Kiselev, M.
name: Bouis, F.
name: Onufrieva, F.
name: Pfeuty, P.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the ordered "excitonic" states which develop around the quantum critical point (QCP) associated with the electronic topological transition (ETT) in a 2D electron system on a square lattice. We consider the case of hopping beyond nearest neighbors when ETT has an unusual character. We show that the amplitude of the order parameter (OP) and of the gap in the electron spectrum increase with increasing the distance from the QCP, δ_c - δ, where δ= 1-n and "n" is an electron concentration. Such a behavior is different from the ordinary case when OP and the gap decrease when going away from the point which is a motor for instability. The gap opens at "hot spots" and extends untill the saddle points (SP) whatever is the doping concentration. The spectrum gets a characteristic flat shape as a result of hybrydization effect in the vicinity of two different SP's. The shape of the spectrum and the angle dependence of the gap have a striking similarity with the features observed in the normal state of the underdoped high-T$_c$ cuprates. We discuss also details about the phase diagram and the behaviour of the density of states.
description: 15 pages, 14 EPS figures included, EPJ style included, added references, changed content
Arctic sea ice conditions in seasonal re-forecasts with the CNRM-CM6-1 model
Creators: name: Välisuo, Ilona
name: Batté, Lauriane
name: Salas y Mélia, David
name: Ardilouze, Constantin
name: Chevallier, Matthieu
Publisher: name: Zenodo
Year: 2019

description: Presentation given at the European Meteorological Society's annual meeting, organized from 9 to 13 September 2019 at the Technical University of Denmark in Lyngby, Copenhagen, Denmark. The presentation was part of the session UP2.4: The cryosphere and cold region processes in the global climate system.
Density-relaxation part of the self energy
Creators: name: Godby, R. W.
name: White, I. D.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A comment is made on the large-cluster limit of the self-energy correction for the quasiparticle energy gap in silicon clusters presented by Serdar Ogut, James R. Chelikowsky and Steven G. Louie in Phys. Rev. Lett. 79, 1770 (1997).
description: 1 page, 1 Figure
Isotope effects and the charge gap formation in the charge ordered phase of colossal magnetoresistance manganites
Creators: name: Yu, Unjong
name: Skrypnyk, Yu. V.
name: Min, B. I.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Giant oxygen isotope effects observed in colossal magnetoresistance manganites are investigated by employing the combined model of the double exchange and interacting lattice polaron mechanism. We have shown that the isotope effects on $ T_C$ in the metallic phase and $ T_{CO}$ in the charge ordered phase of manganites can be explained well in terms of the double exchange and polaron narrowing factors with reasonable physical parameters.
description: 5 pages, 3 figures
title: Fabrique d’un territoire : Couloisy dans l’Oise [poster]
title: Construction of a Territory: Couloisy in the Oise [poster]
Creators: name: Hugonnier, Louis
Publisher: name: Institut National de Recherches Archéologiques Préventives
publisherIdentifier: https://ror.org/04andmq85
publisherIdentifierScheme: ROR
Year: 2022

description: Appréhendé archéologiquement dès le XIXe siècle, le territoire de Couloisy, dans l’Oise, a fait l’objet, en 2010, d’une opération préventive en plein cœur de village, à proximité de l’église romane, sur une surface d’0,8 ha. Les investigations sur le terrain ont exhumé des vestiges plus ou moins bien conservés, matérialisant différentes occupations humaines et couvrant un large spectre chronologique, de la Protohistoire à nos jours. La découverte des ruines de la ferme de la grant Maison, bien foncier dépendant du temporel de l’abbaye royale de Notre-Dame de Soissons, demeure le point d’orgue de ces investigations, autant par sa découverte, ses composantes intrinsèques, que par l’exploitation et la confrontation des données matérielles aux résultats d’une enquête d’envergure menée sur des fonds d’archives, pour la plupart inédits : l’existence d’un corpus conséquent de sources manuscrites, issues principalement des fonds anciens des abbayes de Notre-Dame de Soissons, de Sainte Croix d’Offémont et de Saint Pierre Châtres (relations d’évènements du IXe s. au XVIIIe s.), a fourni un matériau fondamental, utile à la compréhension de cette ferme, tant dans sa composition propre que dans son impact dans la formation du territoire de Couloisy, permettant une lecture à plusieurs échelles, du gisement au modèle dynamique.
description: Archaeologically investigated since the 19th century, the territory of Couloisy, in the Oise region, was the focus of a preventive excavation in 2010 in the very heart of the village, near the Romanesque church, over an area of 0.8 hectares. The fieldwork uncovered archaeological remains of varying degrees of preservation, reflecting different phases of human occupation and spanning a broad chronological range—from the Protohistoric period to the present day. The highlight of these investigations was the discovery of the ruins of the ferme de la Grant Maison, a landed estate belonging to the temporal holdings of the royal abbey of Notre-Dame de Soissons. This find stood out not only because of the nature and components of the site itself, but also due to the productive integration of material evidence with the results of an extensive archival study, based largely on previously unexplored sources. A significant body of manuscript material—primarily from the historical archives of the abbeys of Notre-Dame de Soissons, Sainte-Croix d’Offémont, and Saint-Pierre de Châtres (covering events from the 9th to the 18th century)—provided essential insights into the farm’s structure and operation, as well as its role in shaping the Couloisy territory. This combined approach enabled a multi-scalar reading of the site, from the excavation data to the broader dynamics of territorial formation.