cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Textkritisches zum sogenannten ‘Sulpicius Carthaginiensis’ (AL 653 R.)
Creators: name: Gärtner, Thomas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Ambrosius in psalm. 61,16-27: Eine Predigt gegen den Usurpator Magnus Maximus
Creators: name: Raschle, Christian R.
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Bubbling AdS Black Holes
Creators: name: Liu, James T.
name: Lu, H.
name: Pope, C. N.
name: Vazquez-Poritz, Justin F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the non-BPS analog of `AdS bubbles', which are regular spherically symmetric 1/2 BPS geometries in type IIB supergravity. They have regular horizons and can be thought of as bubbling generalizations of non-extremal AdS black hole solutions in five-dimensional gauged supergravity. Due to the appearance of the Heun equation even at the linearized level, various approximation and numerical methods are needed in order to extract information about this system. We study how the vacuum expectation value and mass of a particular dimension two chiral primary operator depend on the temperature and chemical potential of the thermal Yang-Mills theory. In addition, the mass of the bubbling AdS black holes is computed. As is shown numerically, there are also non-BPS solitonic bubbles which are completely regular and arise from continuous deformations of BPS AdS bubbles.
description: 37 pages, 2 figures
Strafgefangene und Verwahrte in den Justizvollzugsanstalten Thüringens am 31.3.2009
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Tübingen
Year: 2010
Subjects: subject: Strafvollzug , Thüringen , Statistik
subject: 360

description: Die Strafvollzugsstatistik erfasst die Gefangenen und Verwahrten in den Justizvollzugsanstalten auf der Grundlage ihres so genannten Buchwerkes, getrennt für Männer und Frauen sowie im offenen und geschlossenen Vollzug einschließlich Jugendstrafvollzug. Thüringen verfügt zur Zeit über insgesamt fünf Justizvollzugsanstalten sowie eine Jugendstrafanstalt und eine Jugendarrestanstalt. Außerdem besteht bei vier Justizvollzugsanstalten und der Jugendstrafanstalt eine Abteilung des offenen Vollzugs. Weibliche Strafgefangene in den Justizvollzugsanstalten Thüringens werden nur bis zum Jahre 1994 gesondert nachgewiesen. Ab 1995 werden die weiblichen Gefangenen auf der Grundlage einer Vereinbarung zwischen den Freistaaten Sachsen und Thüringen zum Vollzug der Freiheitsstrafe vorwiegend nach Sachsen verlegt. Rechtsgrundlage dieser Erhebung sind die Nummern 72 Abs. 1-3 und 73 der Vollzugsgeschäftsordnung (VGO). Zum Stichtag 31. März eines jeden Jahres werden Strukturdaten nach verschiedenen demographischen und kriminologischen Aspekten aller wegen Verbüßung einer Freiheitsstrafe (einschließlich Ersatzfreiheitsstrafe) oder Jugendstrafe einsitzenden Gefangenen erfasst. Erste Veröffentlichungen dazu erfolgten im Februar 1995 für die Berichtsjahre 1991 bis 1994. Im vorliegenden Bericht werden diese Ergebnisse für das Jahr 2009 dokumentiert. Weitere Veröffentlichungen erscheinen im September eines jeden Jahres. Alle im Laufe eines Jahres eingewiesenen und entlassenen Personen (Gefangenenbewegung) werden in einem gesonderten statistischen Bericht jeweils im Februar eines jeden Jahres veröffentlicht.
Die Taurer - sesshafte Hirten? Zu Ps.-Skymnos F 12 (823)
Creators: name: Korenjak, Martin
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei: Slowly Transient Appearance
Creators: name: Wang, Jian-Min
name: Liu, Jun-Rong
name: Ho, Luis C.
name: Du, Pu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Compact objects are expected to exist in the accretion disks of supermassive black holes (SMBHs) in active galactic nuclei (AGNs), and in the presence of such a dense environment ($\sim 10^{14}\,{\rm cm^{-3}}$), they will form a new kind of stellar population denoted as Accretion-Modified Stars (AMSs). This hypothesis is supported by recent LIGO/Virgo detection of the mergers of very high-mass stellar binary black holes (BHs). We show that the TZOs will be trapped by the SMBH-disk within a typical AGN lifetime. In the context of SMBH-disks, the rates of Bondi accretion onto BHs are $\sim 10^{9}L_{\rm Edd}/c^{2}$, where $L_{\rm Edd}$ is the Eddington luminosity and $c$ is the speed of light. Outflows developed from the hyper-Eddington accretion strongly impact the Bondi sphere and induce episodic accretion. We show that the hyper-Eddington accretion will be halted after an accretion interval of $t_{\rm a}\sim 10^{5}m_{1}\,$s, where $m_{1}=m_{\bullet}/10\sunm$ is the BH mass. The kinetic energy of the outflows accumulated during $t_{\rm a}$ is equivalent to 10 supernovae driving an explosion of the Bondi sphere and developing blast waves. We demonstrate that a synchrotron flare from relativistic electrons accelerated by the blast waves peaks in the soft X-ray band ($\sim 0.1\,$keV), significantly contributing to the radio, optical, UV, and soft X-ray emission of typical radio-quiet quasars. External inverse Compton scattering of the electrons peaks around $40\,$GeV and is detectable through {\it Fermi}-LAT. The flare, decaying with $t^{-6/5}$ with a few months, will appear as a slowly varying transient. The flares, occurring at a rate of a few per year in radio-quiet quasars, provide a new mechanism for explaining AGN variability.
description: 10 pages, 3 figures, accepted
Vector fields, RG flows and emergent gauge symmetry
Creators: name: Nogradi, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We consider the most general perturbatively renormalizable theory of vector fields in four dimensions with a global SU(N) symmetry and massless couplings. The Lagrangian contains 1 quadratic, 2 cubic and 4 quartic couplings. The RG flow among this set of 7 couplings is computed to 1-loop and a rich phase diagram is mapped out; in particular it is shown that a finite number of asymptotically free RG-flows exist corresponding to non-trivial fixed points for the ratios of the couplings. None of these are gauge theories, i.e. possess only global SU(N) invariance but not a local one. We also include the most general ghost couplings, still with global SU(N) invariance, and compute the RG flow to 1-loop for all 9 resulting couplings. Again asymptotically free RG flows exist with non-trivial fixed points for the ratios of couplings. It is shown that Yang-Mills theory emerges at a particular fixed point. The theories at the other fixed points are marginally relevant gauge symmetry violating perturbations of Yang-Mills theory. The large-N limit is also investigated in detail.
description: 19 pages, 3 figures, references added, published version
The BH mass of nearby QSOs: a comparison of the bulge luminosity and virial methods
Creators: name: Labita, Marzia
name: Treves, Aldo
name: Falomo, Renato
name: Uslenghi, Michela
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the analysis of the photometric and spectroscopic properties of a sample of 29 low redshift (z<0.6) QSOs for which both HST WFPC2 images and ultraviolet HST FOS spectra are available. For each object we measure the R band absolute magnitude of the host galaxy, the CIV (1550A) line width and the 1350A continuum luminosity. From these quantities we can estimate the black hole (BH) mass through the M(BH)-L(bulge) relation for inactive galaxies, and from the virial method based on the kinematics of the regions emitting the broad lines. The comparison of the masses derived from the two methods yields information on the geometry of the gas emitting regions bound to the massive BH. The cumulative distribution of the line widths is consistent with that produced by matter laying in planes with inclinations uniformly distributed between 10 and 50 deg, which corresponds to a geometrical factor f=1.3. Our results are compared with those of the literature and discussed within the unified model of AGN.
description: 10 pages, 6 figures. To appear in MNRAS
Ultrafast Vortex-Core Reversal Dynamics in Ferromagnetic Nanodots
Creators: name: Lee, Ki-Suk
name: Guslienko, Konstantin Y.
name: Lee, Jun-Young
name: Kim, Sang-Koog
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To verify the exact underlying mechanism of ultrafast vortex-core reversal as well as the vortex state stability we conducted numerical calculations of the dynamic evolution of magnetic vortices in Permalloy cylindrical nanodots under an oscillating in-plane magnetic field over a wide range of the frequency and amplitude. The calculated results reveal different kinds of the non-trivial dynamic responses of vortices to the driving external field. In particular, the results offer insight into the 10 ps scale underlying physics of the ulrafast vortex-core reversals driven by small amplitude (~10 Oe) in-plane fields. This work also provides fundamentals of how to manipulate effectively the dynamical switching of the vortex-core orientation.
description: 18 pages and 3 figures
Thermodynamics of horizons from a dual quantum system
Creators: name: Sarkar, Sudipta
name: Padmanabhan, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It was shown recently that, in the case of Schwarschild black hole, one can obtain the correct thermodynamic relations by studying a model quantum system and using a particular duality transformation. We study this approach further for the case a general spherically symmetric horizon. We show that the idea works for a general case only if we define the entropy S as a congruence ("observer") dependent quantity and the energy E as the integral over the source of the gravitational acceleration for the congruence. In fact, in this case, one recovers the relation S=E/2T between entropy, energy and temperature previously proposed by one of us in gr-qc/0308070. This approach also enables us to calculate the quantum corrections of the Bekenstein-Hawking entropy formula for all spherically symmetric horizons.
description: 5 pages; no figures
Gemeinschaft in der Fremde: Xenophons “Anabasis” als Quelle zum Söldnertum im Klassischen Griechenland?
Creators: name: Stoll, Oliver
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Improvement of reversible H storage capacity by fine tuning of the composition in the pseudo-binary systems A2-xLaxNi7 (A = Gd, Sm, Y, Mg)
Creators: name: Zhang, Junxian
name: Charbonnier, Véronique
name: Madern, Nicolas
name: Monnier, Judith
name: Latroche, Michel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A2B7 compounds (A = rare earth or Mg, B = transition metal) are widely studied as active materials for negative electrode in Ni-MH batteries. By playing on the substitution rate of both A and B elements, it is possible to prepare various compositions. This strategy will help to improve the properties, for example get a higher reversible hydrogen capacity and a well-adapted hydrogen sorption pressure. Indeed, A can be almost all light rare earths (La to Gd), yttrium and alkaline earth metals (Mg or Ca), whereas B can contain various late transition metals (Mn to Ni). To understand the effects of composition on the physicochemical properties of La2Ni7-based compound, various pseudo-binary systems have been investigated: Gd2 xLaxNi7 (x = 0, 0.6, 1, 1.5), Sm2-xLaxNi7 (x = 0, 0.5, 1, 1.5), Y2-xLaxNi7 (x = 0, 0.4, 0.5, 0.6, 0.8, 1, 1.5, 1.75) and A0.5La1.1Mg0.4Ni7 (A = Sm, Gd and Y). To determine their crystallographic properties, X-ray diffraction analysis was performed followed by Rietveld refinement. Thermodynamic properties regarding reversible hydrogen sorption were investigated at room temperature. Quaternary compounds present drastically improved sorption properties in the frame of practical energy storage applications with reversible capacity equivalent to 400 mAh/g for the compound La1.1Sm0.5Mg0.4Ni7.
The First Blazar Associated with a High-Energy Neutrino - TXS0506+056
Creators: name: Boettcher, Markus
name: Reimer, Anita
name: Buson, Sara
Publisher: name: Zenodo
Year: 2019
Subjects: neutrino, multimessenger physics and astrophysics

description: Invited Talk presented at the “XVIII International Workshop on Neutrino Telescopes”
Pseudovector meson with strangeness and closed-charm
Creators: name: TWQCD Collaboration
name: Chiu, Ting-Wai
name: Hsieh, Tung-Han
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the mass spectrum of 1^{+} exotic mesons with quark content (\c\s\cbar\qbar) or (\c\q\cbar\sbar), using molecular and diquark-antidiquark operators, in quenched lattice QCD with exact chiral symmetry. For the molecular operator {(\qbarγ_i\c)(\cbarγ_5\s)-(\cbarγ_i\s)(\qbarγ_5\c)} and the diquark-antidiquark operator {(\q^T C γ_i \c)(\sbar C γ_5 \cbar^T)- (\q^T C γ_5 \c)(\sbar C γ_i^T \cbar^T)}, both detect a 1^{+} resonance with mass around 4010 +- 50 MeV in the limit m_q -> m_{u,d}.
description: 8 pages, 4 figures, v2: eq.(3) is corrected
Influence of the bus waveguide on the linear and nonlinear response of a taiji microresonator
Creators: name: Franchi, Riccardo
name: Biasi, Stefano
name: Heras, Alberto Muñoz de las
name: Ghulinyan, Mher
name: Carusotto, Iacopo
name: Pavesi, Lorenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the linear and nonlinear response of a unidirectional reflector where a nonlinear breaking of the Lorentz reciprocity is observed. The device under test consists of a racetrack microresonator, with an embedded S-shaped waveguide, coupled to an external bus waveguide (BW). This geometry of the microresonator, known as "taiji" microresonator (TJMR), allows to selectively couple counter-propagating modes depending on the propagation direction of the incident light and, at the nonlinear level, leads to an effective breaking of Lorentz reciprocity. Here, we show that a full description of the device needs to consider also the role of the BW, which introduces (i) Fabry-Perot oscillations (FPOs) due to reflections at its facets, and (ii) asymmetric losses, which depend on the actual position of the TJMR. At sufficiently low powers the asymmetric loss does not affect the unidirectional behavior, but the FP interference fringes can cancel the effect of the S-shaped waveguide. However, at high input power, both the asymmetric loss and the FPOs contribute to the redistribution of the energy between the clockwise and counterclockwise modes within the TJMR. This strongly modifies the nonlinear response, giving rise to counter-intuitive features where, due to the FP effect and the asymmetric losses, the BW properties can determine the violation of the Lorentz reciprocity and, in particular, the difference between the transmittance in the two directions of excitation. The experimental results are explained by using an analytical model based on the transfer matrix approach, a numerical finite-element model and exploiting intuitive interference diagrams.
description: 12 pages, 10 figures
On inversion formulas and Fibonomial coefficients
Creators: name: Kwaśniewski, A. Krzysztof
name: Krot-Sieniawska, Ewa
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05A19, 11B39, 15A09

description: A research problem for undergraduates and graduates is being posed as a cap for the prior antecedent regular discrete mathematics exercises. [Here cap is not necessarily CAP=Competitive Access Provider, though nevertheless ...] The object of the cap problem of final interest i.e. array of fibonomial coefficients and the issue of its combinatorial meaning is to be found in A.K.Kwaśniewski's source papers. The cap problem number seven - still opened for students has been placed on Mathemagics page of the first author [http://ii.uwb.edu.pl/akk/dydaktyka/dyskr/dyskretna.htm]. The indicatory references are to point at a part of the vast domain of the foundations of computer science in ArXiv affiliation noted as CO.cs.DM. The presentation has been verified in a tutor system of communication with a couple of intelligent students. The result is top secret.Temporarily. [Contact: Wikipedia; Theory of cognitive development].
description: 4 pages, presented at the Gian-Carlo Rota Polish Seminar, http://ii.uwb.edu.pl/akk/sem/sem_rota.htm, submitted to FECS'08: The 2008 International Conference on Frontiers in Education: WORLDCOMP'08
Phenomenological model for long wavelength optical modes in transition-metal dichalcogenide monolayer
Creators: name: Trallero-Giner, C.
name: Menéndez-Proupin, E.
name: Morell, E. Suárez
name: Pérez-Alvarez, R.
name: Santiago-Pérez, Darío G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Transition metal dichalcogenides (TMDs) are an exciting family of 2D materials; a member of this family, MoS$_2$, became the first measured monolayer semiconductor. In this article, a generalized phenomenological continuum model for the optical vibrations of the monolayer TMDs valid in the long-wavelength limit is developed. Non-polar oscillations involve differential equations for the phonon displacement vector that describe phonon dispersion up to a quadratic approximation. On the other hand, the polar modes satisfy coupled differential equations for the displacement vectors and the inner electric field. The two-dimensional phonon dispersion curves for in-plane and out-of-plane oscillations are thoroughly analyzed. This model provides an efficient approach to obtain the phonon dispersion curves at the $Γ$-point of the Brillouin zone of the whole family of TMD monolayers. The model parameters are fitted from density functional perturbation theory calculations. A detailed evaluation of the intravalley Pekar-Fröhlich (P-F) and the $A_1$-homopolar mode deformation potential (Dp) coupling mechanisms is performed. The effects of metal ions and chalcogen atoms on polaron mass and binding energy are studied, considering these two contributions, the short-range Dp and P-F. It is argued that both mechanisms must be considered for a correct analysis of the polaron properties.
description: 16 pages, 4 figures
Gute Ordnung ohne Große Rhetra - Noch einmal zu Tyrtaios’ 'Eunomia'
Creators: name: Wees, Hans Van
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Oxygen consumption during kayak paddling
Creators: name: Gray, Georgina Louise
Publisher: name: University of British Columbia
Year: 2008

description: Over a typical 10,000 metre race, flatwater kayak paddlers frequently employ a technique termed "wash riding" in an effort to reduce energy expenditure. This technique is characterized by the kayak paddler travelling on his competitor's wake, and at a strategic moment dropping off the wake to sprint ahead. Investigations to determine actual energy expenditure during flatwater kayak paddling during tactical manoeuvers, to date, have been inadequate. Thus the purpose of this study was to investigate the effects of wash riding on energy expenditure in 10 elite male flatwater kayak athletes (age=25 ± 6.5 yrs., height.=183.6 ± 4.4 cm, mass=83.9 ± 6.1 kg) while kayak paddling under "wash riding" (WR) and "non-wash riding" (NWR) conditions. The exercise test was designed to allow for comparison of minute ventilation (VE), oxygen consumption (V0₂) and heart rate (HR) at submaximal velocities (10,000 metre "steady state" race pace). The exercise protocol consisted of a standardized warm-up, followed by a 2000 metre trial of either WR or NWR. The pace to be maintained (3.7 m/sec), was based on an extrapolation of the 1991 Canadian Canoe Association National Championship 10,000 metre race winning time. Following the first trial there was a twenty minute rest period, which was then followed by a second trial involving the alternate condition. VE, V0₂ and HR were measured every 15 s over the full 2000 metre distance during both conditions using the Cosmed K2 portable telemetry system. Measurements recorded between the 500 and 1500 metre mark were used for analysis in order to examine the effects of wash riding during the steady state aerobic work. A mean value of the eighteen measurements recorded for each variable between 500 and 1500 metres, was calculated for each subject. Statistical analysis of the mean values for VE, V0₂ , and HR was performed using the Hotelling's T² statistic and revealed signifcant (p < 0.05) differences between the WR and NWR trials. Mean values for VE (L•min⁻¹) were (WR) 113 ± 16.5 and (NWR) 126.3 ± 15.7; V0₂ (L•min⁻¹)= (WR) 3.22 ± 0.32 and (NWR) 3.63 ± 0.3 ; and HR (bpm) = (WR) 167 ± 9.9 and (NWR) 174 ± 8.0 . Confidence intervals calculated for VE, V0₂ , and HR revealed that all three dependent variables contributed to the overall significant difference. There is a considerable saving (11 %) in the energy cost of paddling at a standardized velocity utilizing the WR technique. This finding has implications for the design of training programs and competitive strategy plans for flatwater kayak racing.
Existence and asymptotic behavior of $C^1$ solutions to the multidimensional compressible Euler equations with damping
Creators: name: Fang, Daoyuan
name: Xu, Jiang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L65; 76N15

description: In this paper, the existence and asymptotic behavior of $C^1$ solutions to the multidimensional compressible Euler equations with damping on the framework of Besov space are considered. We weaken the regularity requirement of the initial data, and improve the well-posedness results of Sideris-Thomases-Wang (Comm.P.D.E. 28 (2003) 953). The global existence lies on a crucial a-priori estimate which is proved by the spectral localization method. The main analytic tools are the Littlewood-Paley decomposition and Bony's para-product formula.
description: 18 pages
Tyrtaios fr. 1B G/P bzw. fr. °14 G/P (= fr. 4 W) und die große Rhetra - kein Zusammenhang?
Creators: name: Meier, Mischa
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
On wormholes in spacetimes of embedding class one
Creators: name: Kuhfittig, Peter K. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An $n$-dimensional Riemannian space is said to be of embedding class $m$ if $n+m$ is the lowest dimension of the flat space in which the given space can be embedded. A spherically symmetric spacetime of class two can be reduced to class one by a suitable transformation of coordinates. Applied to wormholes, given a well-defined shape function $b=b(r)$, the resulting wormhole has an event horizon and is therefore nontraversable. On a macroscopic scale, $b(r)$ can be replaced by $m(r)$, the effective mass of a spherical star of radius $r$ with $m(0)=0$, to yield a valid solution. Spacetimes of embedding class one have been used successfully for modeling compact stellar objects. On a microscopic scale, one can invoke noncommutative geometry to obtain a charged nontraversable wormhole, i.e., an Einstein-Rosen bridge, and hence a model for a charged particle.
description: 8 pages, no figures
The on-shell self-energy of the uniform electron gas in its weak-correlation limit
Creators: name: Ziesche, Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ring-diagram partial summation (or RPA) for the ground-state energy of the uniform electron gas (with the density parameter $r_s$) in its weak-correlation limit $r_s\to 0 $ is revisited. It is studied, which treatment of the self-energy $Σ(k,ω)$ is in agreement with the Hugenholtz-van Hove (Luttinger-Ward) theorem $μ-μ_0= Σ(k_{\rm F},μ)$ and which is not. The correlation part of the lhs h as the RPA asymptotics $a\ln r_s +a'+O(r_s)$ [in atomic units]. The use of renormalized RPA diagrams for the rhs yields the similar expression $a\ln r_s+a''+O(r_s)$ with the sum rule $a'= a''$ resulting from three sum rules for the components of $a'$ and $a''$. This includes in the second order of exchange the sum rule $μ_{2{\rm x}}=Σ_{2{\rm x}}$ [P. Ziesche, Ann. Phys. (Leipzig), 2006].
description: 19 pages, 10 figures
Magnetic burial and the harmonic content of millisecond oscillations in thermonuclear X-ray bursts
Creators: name: Payne, D. J. B.
name: Melatos, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Matter accreting onto the magnetic poles of a neutron star spreads under gravity towards the magnetic equator, burying the polar magnetic field and compressing it into a narrow equatorial belt. Steady-state, Grad-Shafranov calculations with a self-consistent mass-flux distribution (and a semi-quantitative treatment of Ohmic diffusion) show that, for $\Ma \gtrsim 10^{-5}\Msun$, the maximum field strength and latitudinal half-width of the equatorial magnetic belt are $B_{\rm max} = 5.6\times 10^{15} (\Ma/10^{-4}\Msun)^{0.32}$ G and $Δθ= \max[3^{\circ} (\Ma/10^{-4}\Msun)^{-1.5},3^{\circ} (\Ma/10^{-4}\Msun)^{0.5}(\dot{M}_{\rm a}/10^{-8}\Msun {\rm yr}^{-1})^{-0.5}]$ respectively, where $\Ma$ is the total accreted mass and $\dot{M}_{\rm a}$ is the accretion rate. It is shown that the belt prevents north-south heat transport by conduction, convection, radiation, and ageostrophic shear. This may explain why millisecond oscillations observed in the tails of thermonuclear (type I) X-ray bursts in low-mass X-ray binaries are highly sinusoidal: the thermonuclear flame is sequestered in the magnetic hemisphere which ignites first. The model is also consistent with the occasional occurrence of closely spaced pairs of bursts. Time-dependent, ideal-magnetohydrodynamic simulations confirm that the equatorial belt is not disrupted by Parker and interchange instabilities.
description: 8 pages, 3 figures, accepted for publication in The Astrophysical Journal
Tracce delle 'Vite dei Filosofi' di Diogene Laerzio nell 'Epistolario' di Fozio?
Creators: name: Dorandi, Tiziano
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Clifford spinors and root system induction: $H_4$ and the Grand Antiprism
Creators: name: Dechant, Pierre-Philippe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 52B15, Secondary 52B11, 15A66, 20F55, 17B22, 20G41

description: Recent work has shown that every 3D root system allows the construction of a correponding 4D root system via an `induction theorem'. In this paper, we look at the icosahedral case of $H_3\rightarrow H_4$ in detail and perform the calculations explicitly. Clifford algebra is used to perform group theoretic calculations based on the versor theorem and the Cartan-Dieudonné theorem, giving a simple construction of the Pin and Spin covers. Using this connection with $H_3$ via the induction theorem sheds light on geometric aspects of the $H_4$ root system (the $600$-cell) as well as other related polytopes and their symmetries, such as the famous Grand Antiprism and the snub 24-cell. The uniform construction of root systems from 3D and the uniform procedure of splitting root systems with respect to subrootsystems into separate invariant sets allows further systematic insight into the underlying geometry. All calculations are performed in the even subalgebra of Cl(3), including the construction of the Coxeter plane, which is used for visualising the complementary pairs of invariant polytopes, and are shared as supplementary computational work sheets. This approach therefore constitutes a more systematic and general way of performing calculations concerning groups, in particular reflection groups and root systems, in a Clifford algebraic framework.
description: 32 pages, 11 figures
Work Generation from Thermal Noise by Quantum Phase-Sensitive Observation
Creators: name: Opatrný, Tomas
name: Misra, Avijit
name: Kurizki, Gershon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We put forward the concept of work extraction from thermal noise by phase-sensitive (homodyne) measurements of the noisy input followed by (outcome-dependent) unitary manipulations of the post-measured state. For optimized measurements, noise input with more than one quantum on average is shown to yield heat-to-work conversion with efficiency and power that grow with the mean number of input quanta, detector efficiency and its inverse temperature. This protocol is shown to be advantageous compared to common models of information and heat engines.
description: 6+18 pages, Close to the accepted version in PRL
Implementation of the LANS-alpha turbulence model in a primitive equation ocean model
Creators: name: Hecht, Matthew W.
name: Holm, Darryl D.
name: Petersen, Mark R.
name: Wingate, Beth A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper presents the first numerical implementation and tests of the Lagrangian-averaged Navier-Stokes-alpha (LANS-alpha) turbulence model in a primitive equation ocean model. The ocean model in which we work is the Los Alamos Parallel Ocean Program (POP); we refer to POP and our implementation of LANS-alpha as POP-alpha. Two versions of POP-alpha are presented: the full POP-alpha algorithm is derived from the LANS-alpha primitive equations, but requires a nested iteration that makes it too slow for practical simulations; a reduced POP-alpha algorithm is proposed, which lacks the nested iteration and is two to three times faster than the full algorithm. The reduced algorithm does not follow from a formal derivation of the LANS-alpha model equations. Despite this, simulations of the reduced algorithm are nearly identical to the full algorithm, as judged by globally averaged temperature and kinetic energy, and snapshots of temperature and velocity fields. Both POP-alpha algorithms can run stably with longer timesteps than standard POP. Comparison of implementations of full and reduced POP-alpha algorithms are made within an idealized test problem that captures some aspects of the Antarctic Circumpolar Current, a problem in which baroclinic instability is prominent. Both POP-alpha algorithms produce statistics that resemble higher-resolution simulations of standard POP. A linear stability analysis shows that both the full and reduced POP-alpha algorithms benefit from the way the LANS-alpha equations take into account the effects of the small scales on the large. Both algorithms (1) are stable; (2) make the Rossby Radius effectively larger; and (3) slow down Rossby and gravity waves.
description: Submitted to J. Computational Physics March 21, 2007
CMB map derived from the WMAP data through Harmonic Internal Linear Combination
Creators: name: Kim, Jaiseung
name: Naselsky, Pavel
name: Christensen, Per Rex
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We are presenting an Internal Linear Combination (ILC) CMB map, in which the foreground is reduced through harmonic variance minimization. We have derived our method by converting a general form of pixel-space approach into spherical harmonic space, maintaining full correspondence. By working in spherical harmonic space, spatial variability of linear weights is incorporated in a self-contained manner and our linear weights are continuous functions of position over the entire sky. The full correspondence to pixel-space approach enables straightforward physical interpretation on our approach. In variance minimization of a linear combination map, the existence of a cross term between residual foregrounds and CMB makes the linear combination of minimum variance differ from that of minimum foreground. We have developed an iterative foreground reduction method, where perturbative correction is made for the cross term. Our CMB map derived from the WMAP data is in better agreement with the WMAP best-fit $Λ$CDM model than the WMAP team's Internal Linear Combination map. We find that our method's capacity to clean foreground is limited by the availability of enough spherical harmonic coefficients of good Signal-to-Noise Ratio (SNR).
description: The whole sky CMB map, which is derived from the WMAP 5 year data through our method, is available in HEALPix FITS format at http://www.nbi.dk/~jkim/hilc The paper with higher resolution images also available at http://www.nbi.dk/~jkim/hilc
Higher loop renormalization of a supersymmetric field theory
Creators: name: Bellon, Marc
name: Lozano, Gustavo S.
name: Schaposnik, Fidel A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using Dyson--Schwinger equations within an approach developed by Broadhurst and Kreimer and the renormalization group, we show how high loop order of the renormalization group coefficients can be efficiently computed in a supersymmetric model.
description: 8 pages, 2 figures
Effect of the Degree of Connection on Local Buckling of Continuous Composite Beams
Creators: name: Mohamed Bensoula
name: Mohamed Tehami
Publisher: name: Zenodo
Year: 2023
Subjects: Degree of Connection, Local Buckling, Composite Beams, Eurocode, Rotation.

description: Abstract

The study of the effect of the connection on local buckling of continuous composite beams is highly important, especially at the neighborhood of intermediate supports where negative bending affects the connection sizing. Sections at intermediate supports of continuous composite beams become more critical because of the flexural stiffness reduction due to slab cracking and the tendency of the neutral axis to rise up in the steel web leading to the change of class section according to Eurocode 4. The proposed analytical model allows to predict the rotation capacity of sections of class 2 according to Eurocode 4 for full or partial connection with a constant degree of connection. Therefore, the aim of this paper is to verify the validity of the proposed analytical model for various degrees of connection in order to generalize its use. Again, the theoretical results of the established model are confronted to experimental results and then validated for different degrees of connection.
Magnetic properties of bilayer VI3: Role of trigonal crystal field and electric-field tuning
Creators: name: Nguyen, Thi Phuong Thao
name: Yamauchi, Kunihiko
name: Oguchi, Tamio
name: Amoroso, Danila
name: Picozzi, Silvia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic properties of two-dimensional VI3 bilayer are the focus of our first-principles analysis, highlighting the role of trigonal crystal-field effects and carried out in comparison with the CrI3 prototypical case, where the effects are absent. In VI3 bilayers, the empty a1g state - consistent with the observed trigonal distortion - is found to play a crucial role in both stabilizing the insulating state and in determining the inter-layer magnetic interaction. Indeed, an analysis based on maximally localized Wannier functions allows to evaluate the interlayer exchange interactions in two different VI3 stackings (labelled AB and AB'), to interpret the results in terms of virtual-hopping mechanism, and to highlight the strongest hopping channels underlying the magnetic interlayer coupling. Upon application of electric fields perpendicular to the slab, we find that the magnetic ground-state in the AB' stacking can be switched from antiferromagnetic to ferromagnetic, suggesting VI3 bilayer as an appealing candidate for electric-field-driven miniaturized spintronic devices.
description: 8 pages, 5 figures, submitted for publication
Air-shower simulations with and without thinning: artificial fluctuations and their suppression
Creators: name: Gorbunov, D. S.
name: Rubtsov, G. I.
name: Troitsky, S. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The most common way to simplify extensive Monte-Carlo simulations of air showers is to use the thinning approximation. We study its effect on the physical parameters reconstructed from simulated showers. To this end, we have created a library of showers simulated without thinning with energies from 10^17 eV to 10^18 eV, various zenith angles and primaries. This library is publicly available. Physically interesting applications of the showers simulated without thinning are discussed. Observables reconstructed from these showers are compared to those obtained with the thinning approximation. The amount of artificial fluctuations introduced by thinning is estimated. A simple method, multisampling, is suggested which results in a controllable suppression of artificial fluctuations and at the same time requires less demanding computational resources as compared to the usual thinning.
description: 8 pages, revtex. The shower library is available at http://livni.inr.ac.ru; v2: extended discussion of the multisampling
Cache-Efficient Fork-Processing Patterns on Large Graphs
Creators: name: Lu, Shengliang
name: Sun, Shixuan
name: Paul, Johns
name: Li, Yuchen
name: He, Bingsheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: H.2

description: As large graph processing emerges, we observe a costly fork-processing pattern (FPP) that is common in many graph algorithms. The unique feature of the FPP is that it launches many independent queries from different source vertices on the same graph. For example, an algorithm in analyzing the network community profile can execute Personalized PageRanks that start from tens of thousands of source vertices at the same time. We study the efficiency of handling FPPs in state-of-the-art graph processing systems on multi-core architectures. We find that those systems suffer from severe cache miss penalty because of the irregular and uncoordinated memory accesses in processing FPPs. In this paper, we propose ForkGraph, a cache-efficient FPP processing system on multi-core architectures. To improve the cache reuse, we divide the graph into partitions each sized of LLC capacity, and the queries in an FPP are buffered and executed on the partition basis. We further develop efficient intra- and inter-partition execution strategies for efficiency. For intra-partition processing, since the graph partition fits into LLC, we propose to execute each graph query with efficient sequential algorithms (in contrast with parallel algorithms in existing parallel graph processing systems) and present an atomic-free query processing by consolidating contending operations to cache-resident graph partition. For inter-partition processing, we propose yielding and priority-based scheduling, to reduce redundant work in processing. Besides, we theoretically prove that ForkGraph performs the same amount of work, to within a constant factor, as the fastest known sequential algorithms in FPP queries processing, which is work efficient. Our evaluations on real-world graphs show that ForkGraph significantly outperforms state-of-the-art graph processing systems with two orders of magnitude speedups.
description: in SIGMOD 2021
Variable size particle probing of the DLA cluster properties
Creators: name: Menshutin, A. Yu.
name: Shchur, L. N.
name: Vinokur, V. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a technique for probing harmonic measure of the diffusion limited aggregation (DLA) cluster surface with the variable size particle and generate one thousand clusters with 50 million particles using original off-lattice killing-free algorithm. Taking, in sequence, the limit of the vanishing size of the probing particles and then sending the growing cluster size to infinity, we achieve the unprecedented accuracy determining the fractal dimension, D=1.7100(2) crucial to characterization of geometric properties of the DLA clusters.
description: 4 pages, 5 figures
Comonotonic measures of multivariate risks
Creators: name: Ekeland, Ivar
name: Galichon, Alfred
name: Henry, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: We propose a multivariate extension of a well-known characterization by S. Kusuoka of regular and coherent risk measures as maximal correlation functionals. This involves an extension of the notion of comonotonicity to random vectors through generalized quantile functions. Moreover, we propose to replace the current law invariance, subadditivity and comonotonicity axioms by an equivalent property we call strong coherence and that we argue has more natural economic interpretation. Finally, we reformulate the computation of regular and coherent risk measures as an optimal transportation problem, for which we provide an algorithm and implementation.
description: 33 pages, 6 figures
Anmerkungen zum neuen Poseidipp (P. Mil. Vogl. VIII 309)
Creators: name: Bernsdorff, Hans
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 5 (2002): Göttinger Forum für Altertumswissenschaft
Neurodegenerative biomarkers outperform neuroinflammatory biomarkers in amyotrophic lateral sclerosis
Creators: name: Kläppe, Ulf
name: Sennfält, Stefan
name: Lovik, Anikó
name: Finn, Anja
name: Bofaisal, Ulrika
name: Zetterberg, Henrik
name: Blennow, Kaj
name: Piehl, Fredrik
name: Kmezic, Ivan
name: Press, Rayomand
name: Samuelsson, Kristin
name: Månberg, Anna
name: Fang, Fang
name: Ingre, Caroline
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Virology

description: To describe the diagnostic and prognostic performance, and longitudinal trajectories, of potential biomarkers of neuroaxonal degeneration and neuroinflammation in amyotrophic lateral sclerosis (ALS). This case-control study included 192 incident ALS patients, 42 ALS mimics, 114 neurological controls, and 117 healthy controls from Stockholm, Sweden. Forty-four ALS patients provided repeated measurements. We assessed biomarkers of (1)neuroaxonal degeneration: neurofilament light (NfL) and phosphorylated neurofilament heavy (pNfH) in cerebrospinal fluid (CSF) and NfL in serum, and (2)neuroinflammation: chitotriosidase-1 (CHIT1) and monocyte chemoattractant protein 1 (MCP-1) in CSF. To evaluate diagnostic performance, we calculated the area under the curve (AUC). To estimate prognostic performance, we applied quantile regression and Cox regression. We used linear regression models with robust standard errors to assess temporal changes over time. Neurofilaments performed better at differentiating ALS patients from mimics (AUC: pNfH 0.92, CSF NfL 0.86, serum NfL 0.91) than neuroinflammatory biomarkers (AUC: CHIT1 0.71, MCP-1 0.56). Combining biomarkers did not improve diagnostic performance. Similarly, neurofilaments performed better than neuroinflammatory biomarkers at predicting functional decline and survival. The stratified analysis revealed differences according to the site of onset: in bulbar patients, neurofilaments and CHIT1 performed worse at predicting survival and correlations were lower between biomarkers. Finally, in bulbar patients, neurofilaments and CHIT1 increased longitudinally but were stable in spinal patients. Biomarkers of neuroaxonal degeneration displayed better diagnostic and prognostic value compared with neuroinflammatory biomarkers. However, in contrast to spinal patients, in bulbar patients neurofilaments and CHIT1 performed worse at predicting survival and seemed to increase over time.
Syntactic elicitation and picture task (various)
Creators: name: XHP
name: XLD
name: Baclawski, Kenneth
name: Sikhara (Đàng Thanh Quốc Thuận)
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: cjm

description: Picture task: Using cards from the board game Dixit to elicit question-answer pairs. Syntactic elicitation: wh-phrases, intervention, indefinites, reconstruction, object shift.
A Vlbi Survey of Weak Extragalactic Radio Sources for the Alignment of the Icrf and the Future Gaia Frame
Creators: name: Bourda, G.
name: Charlot, P.
name: Porcas, R.
name: Garrington, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA frame and the International Celestial Reference Frame (ICRF) with the highest accuracy. Currently, it is found that only 10% of the ICRF sources are suitable to establish this link, either because they are not bright enough at optical wavelengths or because they have significant extended radio emission which precludes reaching the highest astrometric accuracy. In order to improve the situation, we have initiated a VLBI survey dedicated to finding additional high-quality radio sources for aligning the two frames. The sample consists of about 450 sources, typically 20 times weaker than the current ICRF sources, which have been selected by cross-correlating optical and radio catalogues. The paper presents the observing strategy and includes preliminary results of observation of 224 of these sources with the European VLBI Network in June 2007.