cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
J1721$+$8842: a gravitationally lensed binary quasar with a proximate damped Lyman-$α$ absorber
Creators: name: Lemon, C.
name: Millon, M.
name: Sluse, D.
name: Courbin, F.
name: Auger, M.
name: Chan, J.
name: Paic, E.
name: Agnello, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High-redshift binary quasars provide key insights into mergers and quasar activity, and are useful tools for probing the spatial kinematics and chemistry of galaxies along the line-of-sight. However, only three sub-10-kpc binaries have been confirmed above $z=1$. Gravitational lensing would provide a way to easily resolve such binaries, study them in higher resolution, and provide more sightlines, though the required alignment with a massive foreground galaxy is rare. Through image deconvolution of StanCam Nordic Optical Telescope (NOT) monitoring data, we reveal two further point sources in the known, $z \approx 2.38$, quadruply lensed quasar (quad), J1721+8842. An ALFOSC/NOT long-slit spectrum shows that the brighter of these two sources is a quasar with $z = 2.369 \pm 0.007$ based on the C III] line, while the C III] redshift of the quad is $z = 2.364 \pm 0.003$. Lens modelling using point source positions rules out a single source model, favouring an isothermal lens mass profile with two quasar sources separated by $\sim6.0$ kpc (0.73$^{\prime \prime}$) in projection. Given the resolving ability from lensing and current lensed quasar statistics, this discovery suggests a large population of undiscovered, unlensed sub-10-kpc binaries. We also analyse spectra of two images of the quad, showing narrow Ly$α$ emission within the trough of a proximate damped Ly$α$ absorber (PDLA). An apparent mismatch between the continuum and narrow line flux ratios provides a new potential tool for simultaneously studying microlensing and the quasar host galaxy. Signs of the PDLA are also seen in the second source, however a deeper spectrum is still required to confirm this. Thanks to the multiple lines-of-sight from lensing and two quasar sources, this system offers simultaneous sub-parsec and kpc-scale probes of a PDLA.
description: 10 pages, 7 figures, submitted to A&A
Generalisation of the Menegozzi & Lamb Maser Algorithm to the Transient Superradiance Regime
Creators: name: Wyenberg, C. M.
name: Lankhaar, B.
name: Rajabi, F.
name: Chama, M. A.
name: Houde, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the application of the conventional quasi-steady state maser modelling algorithm of Menegozzi & Lamb (ML) to the high field transient regime of the one-dimensional Maxwell-Bloch (MB) equations for a velocity distribution of atoms or molecules. We quantify the performance of a first order perturbation approximation available within the ML framework when modelling regions of increasing electric field strength, and we show that the ML algorithm is unable to accurately describe the key transient features of R. H. Dicke's superradiance (SR). We extend the existing approximation to one of variable fidelity, and we derive a generalisation of the ML algorithm convergent in the transient SR regime by performing an integration on the MB equations prior to their Fourier representation. We obtain a manifestly unique integral Fourier representation of the MB equations which is $\mathcal{O}\left(N\right)$ complex in the number of velocity channels $N$ and which is capable of simulating transient SR processes at varying degrees of fidelity. As a proof of operation, we demonstrate our algorithm's accuracy against reference time domain simulations of the MB equations for transient SR responses to the sudden inversion of a sample possessing a velocity distribution of moderate width. We investigate the performance of our algorithm at varying degrees of approximation fidelity, and we prescribe fidelity requirements for future work simulating SR processes across wider velocity distributions.
description: 17 pages, 10 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society, 2021-08-01
Consistent Depth of Moving Objects in Video
Creators: name: Zhang, Zhoutong
name: Cole, Forrester
name: Tucker, Richard
name: Freeman, William T.
name: Dekel, Tali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: We present a method to estimate depth of a dynamic scene, containing arbitrary moving objects, from an ordinary video captured with a moving camera. We seek a geometrically and temporally consistent solution to this underconstrained problem: the depth predictions of corresponding points across frames should induce plausible, smooth motion in 3D. We formulate this objective in a new test-time training framework where a depth-prediction CNN is trained in tandem with an auxiliary scene-flow prediction MLP over the entire input video. By recursively unrolling the scene-flow prediction MLP over varying time steps, we compute both short-range scene flow to impose local smooth motion priors directly in 3D, and long-range scene flow to impose multi-view consistency constraints with wide baselines. We demonstrate accurate and temporally coherent results on a variety of challenging videos containing diverse moving objects (pets, people, cars), as well as camera motion. Our depth maps give rise to a number of depth-and-motion aware video editing effects such as object and lighting insertion.
description: Published at SIGGRAPH 2021
title: Matrix iterations and filter combinatorics
Creators: name: Bermejo Morán, Moisés
Year: 2025

description: Diese Arbeit untersucht Matrix-Iterationstechniken des Forcings und diskutiert einige Anwendungen, die es ermöglichen, kardinale Invarianten des Kontinuums und Filterkombinatorik zu analysieren. Insbesondere nutzen wir diese Techniken, um drei Konstruktionen von Modellen der Mengenlehre zu betrachten, in denen bestimmte Beziehungen zwischen kardinalen Invarianten entschieden werden können. Die erste Konstruktion, von Blass-Shelah (1989), zeigte die Konsistenz von u < d, also zwischen der Ultrafilter-erzeugenden und der dominierenden Zahl. Die zweite, von Fischer-Friedman-Mejía-Montoya (2018), zeigte die Konsistenz von b = a < d, also zwischen der beschränkenden, fast disjunkten und der dominierenden Zahl. Die dritte, von Brendle-Fischer (2011), berücksichtigt zusätzlich die Spaltungszahl in der Relation und zeigt die Konsistenz von b = a < s. Wir schließen mit einer Diskussion über einige Implikationen dieser Konstruktionen in anderen Bereichen der Mengenlehre, insbesondere in der Filterkombinatorik.
description: The thesis reviews matrix iteration techniques of forcing and discusses some applications that allow to analyze cardinal invariants of the continuum and filter combinatorics. In particular, we will use these techniques to review three constructions of models of set theory in which some relations between cardinal invariants can be decided. The first one, from Blass-Shelah (1989) showed the consistency of u < d, between the ultrafilter generating and dominating numbers. The second one, from Fischer-Friedman-Mejía-Montoya (2018), showed the consistency of b = a < d, between the bounding, almost disjoint and dominating numbers. The third one, from Brendle-Fischer (2011) additionally considers the splitting number in the relation, showing the consistency of b = a < s. We conclude with a discussion about some implications of these constructions in other areas of set theory, in particular, in filter combinatorics.
Search for gamma-ray emission from the 12 nearby dwarf spheroidal galaxies with 12 years of Fermi-LAT data
Creators: name: Li, Shang
name: Liang, Yun-Feng
name: Fan, Yi-Zhong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Previously, we have shown in Li et al. (2018) that very weak $γ$-ray excesses ($\sim 2σ$) appear in some Milky Way dwarf spheroidal galaxies (dSphs, including candidates) and the combination analysis of 12 nearby dSphs yields a local significance of $>4σ$. In this work, we adopt a longer data set (i.e., the 12 years of Fermi-LAT data), the latest Fermi-LAT software as well as background models to update the searches of $γ$-ray emission from these sources. Very weak $γ$-ray excesses ($>$ 2 $σ$) are found in the directions of three dSphs, including Reticulum II, Bootes II and Willman 1. In the direction of Reticulum II, the peak TS value of the excess reaches $\sim$11. However, different from the previous analysis with the 9 years of Fermi-LAT data, now the location of the gamma-ray emission is significantly away from the center of Reticulum II because of the enhancement of "offset" $γ$-rays above 10 GeV since 2017. The detected weak excess is likely due to the contamination of an astrophysical $γ$-ray source with a TS value of $\sim 22$, irrelevant to the dark matter inside Reticulum II. The possible excesses in the directions of Bootes II and Willman 1 are weaker with lower peak TS values ($\sim 7$). If interpreted as annihilation of dark matter particles into $τ^+τ^-$, the dark mass mass of $m_χ\sim 14$ GeV and $\sim 80$ GeV are found for Bootes II and Willman 1, respectively. Much more data are needed to clarify whether these two potential signals are real and then reveal their origins.
description: 10 pages, 6 figures, accepted for publication in PRD
CIFRA National Survey: Uruguay July 2008
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Main problems in country; economic situation of your family; economic situation of country; future financial expectations; purchasing household appliances; voting in primary elections; likability of politicians and presidential candidates; improvement in healthcare ; health insurance; approval of district mayor; district government alignment with the Broad Front, a left-wing political coalition; flaws of district government; government focus on attracting foreign investors; approval of President Tabaré Vázquez; approval of government economic policy; ideal president qualities; past voting history; political spectrum position; future measures implemented by the government; potential future voting choices. National Agency for Research and Innovation (ANII) Collection.
Can the Fe K-alpha Line Reliably Predict Supernova Remnant Progenitors?
Creators: name: Siegel, Jared
name: Dwarkadas, Vikram V.
name: Frank, Kari A.
name: Burrows, David N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The centroid energy of the Fe K$α$ line has been used to identify the progenitors of supernova remnants (SNRs). These investigations generally considered the energy of the centroid derived from the spectrum of the entire remnant. Here we use {\it XMM-Newton} data to investigate the Fe K$α$ centroid in 6 SNRs: 3C~397, N132D, W49B, DEM L71, 1E 0102.2-7219, and Kes 73. In Kes 73 and 1E 0102.2-7219, we fail to detect any Fe K$α$ emission. We report a tentative first detection of Fe K$α$ emission in SNR DEM L71, with a centroid energy consistent with its Type Ia designation. In the remaining remnants, the spatial and spectral sensitivity is sufficient to investigate spatial variations of the Fe K$α$ centroid. We find in N132D and W49B that the centroids in different regions are consistent with that derived from the overall spectrum, although not necessarily with the remnant type identified via other means. However, in SNR 3C~397, we find statistically significant variation in the centroid of up to 100 eV, aligning with the variation in the density structure around the remnant. These variations span the intermediate space between centroid energies signifying core-collapse and Type Ia remnants. Shifting the dividing line downwards by 50 eV can place all the centroids in the CC region, but contradicts the remnant type obtained via other means. Our results show that caution must be used when employing the Fe K$α$ centroid of the entire remnant as the sole diagnostic for typing a remnant.
description: 10 pages, 3 figures. Accepted to the Astrophysical Journal
Geometric phase and non-adiabatic resonance of the Rabi model
Creators: name: Liu, Sijiang
name: Lü, Zhiguo
name: Zheng, Hang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the effects of counterrotating terms on geometric phase and its relation to the resonance of the Rabi model. We apply the unitary transformation with a single parameter to the Rabi model and obtain the transformed Hamiltonian involving multiple harmonic terms. By combining the counter-rotating-hybridized rotating-wave method with time-dependent perturbation theory, we solve systematically time evolution operator and then obtain the geometric phase of the two-level system. Our results are beyond adiabatic approximation and rotating-wave approximation (RWA). Higher-order harmonic resonance happens when driving frequency is equal to higher-order subharmonic of the Rabi frequency. In comparison with numerically exact results, our calculated results are accurate over a wide range of parameters space, especially in higher-order harmonic resonance regimes. In these regimes we demonstrate geometric phases change dramatically while those of the RWA are smooth. The RWA is thoroughly invalid even if the driving strength is extremely weak. We find it is the higher-order harmonic terms that play an important role on the cyclic state and demonstrate the characters of geometric phase in higher-order harmonic resonance regime. We also present analytical formalism of the change rate of geometric phase and quasienergies, which agree well with numerically exact ones even in the strong driving case. The developed method can be applied to explore the dynamics of strongly driven qubits and physical properties of higher-order harmonic processes.
description: 22 pages, 5 figures
Active dipolar spheroids in shear flow and transverse field: Population splitting, cross-stream migration and orientational pinning
Creators: name: Shabanniya, Mohammad Reza
name: Naji, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the steady-state behavior of active, dipolar, Brownian spheroids in a planar channel subjected to an imposed Couette flow and an external transverse field, applied in the 'downward' normal-to-flow direction. The field-induced torque on active spheroids (swimmers) is taken to be of magnetic form by assuming that they have a permanent magnetic dipole moment, pointing along their self-propulsion (swim) direction. Using a continuum approach, we show that a host of behaviors emerge over the parameter space spanned by the particle aspect ratio, self-propulsion and shear/field strengths, and the channel width. The cross-stream migration of the model swimmers is shown to involve a regime of linear response (quantified by a linear-response factor) in weak fields. For prolate swimmers, the weak-field behavior crosses over to a regime of full swimmer migration to the bottom half of the channel in strong fields. For oblate swimmers, a counterintuitive regime of reverse migration arises in intermediate fields, where a macroscopic fraction of swimmers reorient and swim to the top channel half at an acute `upward' angle relative to the field axis. The diverse behaviors reported here are analyzed based on the shear-induced population splitting (bimodality) of the swim orientation, giving two distinct, oppositely polarized, swimmer subpopulations (albeit very differently for prolate/oblate swimmers) in each channel half. In strong fields, swimmers of both types exhibit net upstream currents relative to the laboratory frame. The onsets of full migration and net upstream current depend on the aspect ratio, enabling efficient particle separation strategies in microfluidic setups.
description: 23 pages, 15 figures
Discontinuous yielding transition of amorphous materials with low bulk modulus
Creators: name: Jagla, E. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The yielding transition of amorphous materials is studied with a two-dimensional Hamiltonian model that allows both shear and volume deformations. The model is investigated as a function of the relative value of the bulk modulus $B$ with respect to the shear modulus $μ$. When the ratio $B/μ$ is small enough, the yielding transition becomes discontinuous, yet reversible. If the system is driven at constant strain rate in the coexistence region, a spatially localized shear band is observed while the rest of the system remains blocked. The crucial role of volume fluctuations in the origin of this behavior is clarified in a mean field version of the model.
description: 8 pages, 7 figures
Gaia DR2 reveals a star formation burst in the disc 2-3 Gyr ago
Creators: name: Mor, R.
name: Robin, A.C.
name: Figueras, F.
name: Antoja, F.
name: Roca-Fàbrega, S.
name: Luri, X.
Publisher: name: Zenodo
Year: 2019
Subjects: star formation history
star formation rate
galaxy merge
stellar initial mass function

description: We use Gaia data release 2 (DR2) magnitudes, colours, and parallaxes for stars with G < 12 to explore a parameter space with 15 dimensions that simultaneously includes the initial mass function (IMF) and a non-parametric star formation history (SFH) for the Galactic disc. This inference is performed by combining the Besançon Galaxy Model fast approximate simulations (BGM FASt) and an approximate Bayesian computation algorithm. We find in Gaia DR2 data an imprint of a star formation burst 2–3 Gyr ago in the Galactic thin disc domain, and a present star formation rate (SFR) of ≈1 M/yr. Our results show a decreasing trend of the SFR from 9–10 Gyr to 6–7 Gyr ago. This is consistent with the cosmological star formation quenching observed at redshifts z < 1.8. This decreasing trend is followed by a SFR enhancement starting at ∼5 Gyr ago and continuing until ∼1 Gyr ago which is detected with high statistical significance by discarding the null hypothesis of an exponential SFH with a p-value = 0.002. We estimate, from our best fit model, that about 50% of the mass used to generate stars, along the thin disc life, was expended in the period from 5 to 1 Gyr ago. The timescale and the amount of stellar mass generated during the SFR enhancement event lead us to hypothesise that its origin, currently under investigation, is not intrinsic to the disc. Thus, an external perturbation is needed for its explanation. Additionally, for the thin disc we find a slope of the IMF of α3 ≈ 2 for masses M > 1.53 M and α2 ≈ 1.3 for the mass range between 0.5 and 1.53 M. This is the first time that we consider a non-parametric SFH for the thin disc in the Besançon Galaxy Model. This new step, together with the capabilities of the Gaia DR2 parallaxes to break degeneracies between different stellar populations, allow us to better constrain the SFH and the IMF.
Universality of Zipf's Law
Creators: name: Murtra, Bernat Corominas
name: Solé, Ricard
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Zipf's law is the most common statistical distribution displaying scaling behavior. Cities, populations or firms are just examples of this seemingly universal law. Although many different models have been proposed, no general theoretical explanation has been shown to exist for its universality. Here we show that Zipf's law is, in fact, an inevitable outcome of a very general class of stochastic systems. Borrowing concepts from Algorithmic Information Theory, our derivation is based on the properties of the symbolic sequence obtained through successive observations over a system with an unbounded number of possible states. Specifically, we assume that the complexity of the description of the system provided by the sequence of observations is the one expected for a system evolving to a stable state between order and disorder. This result is obtained from a small set of mild, physically relevant assumptions. The general nature of our derivation and its model-free basis would explain the ubiquity of such a law in real systems.
description: 11 Pages, 2 figures
Aktivitetsbaseret Måling af Virksomhedernes Administrative Byrder
Creators: Erhvervs- og Selskabsstyrelsen
Publisher: name: Rigsarkivet
Year: 2022

description: AMVAB står for Aktivitetsbaseret Måling af Virksomhedernes Administrative Byrder. AMVAB er en metode, der gennem kortlægning af private, danske virksomheders tidsforbrug måler erhvervslivets administrative omkostninger ved at efterleve erhvervsrettet regulering. Opgørelserne af de administrative omkostninger ved de enkelte regler betyder, at det bliver mere tydeligt, hvilke regler der medfører de største administrative omkostninger samt hvilke dele af reglerne, der er specielt byrdefulde for virksomhederne. Derved kan indsatsen for at reducere de administrative byrder for erhvervslivet fokuseres.
Search for Galactic Civilizations Using Historical Supernovae
Creators: name: Seto, Naoki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: We study an interstellar signaling scheme which was originally proposed by Seto (2019) and efficiently links intentional transmitters to ETI searchers through a conspicuous astronomical burst, without prior communication. Based on the geometrical and game theoretic viewpoints, the scheme can be refined so that intentional signals can be sent and received after observing a reference burst, in contrast to the original proposal (before observing a burst). Given this inverted temporal structure, Galactic supernovae recorded in the past 2000 years can be regarded as interesting guideposts for an ETI search. While the best use period of SN 393 has presumably passed $\sim$100 years ago, some of the historical supernovae might allow us to compactify the ETI survey regions down to less than one present of $4π$, around two rings in the sky.
description: 6 pages, 5 figures, accepted for publication in ApJ
Higher Derivative Corrections to R-charged Black Holes: Boundary Counterterms and the Mass-Charge Relation
Creators: name: Cremonini, Sera
name: Liu, James T.
name: Szepietowski, Phillip
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We carry out the holographic renormalization of Einstein-Maxwell theory with curvature-squared corrections. In particular, we demonstrate how to construct the generalized Gibbons-Hawking surface term needed to ensure a perturbatively well-defined variational principle. This treatment ensures the absence of ghost degrees of freedom at the linearized perturbative order in the higher-derivative corrections. We use the holographically renormalized action to study the thermodynamics of R-charged black holes with higher derivatives and to investigate their mass to charge ratio in the extremal limit. In five dimensions, there seems to be a connection between the sign of the higher derivative couplings required to satisfy the weak gravity conjecture and that violating the shear viscosity to entropy bound. This is in turn related to possible constraints on the central charges of the dual CFT, in particular to the sign of c-a.
description: 30 pages. v2: references added, some equations simplified
Sundhedsstyrelsens ESDH-system
Creators: Sundhedsstyrelsen
Landslægen på Færøerne
Sammenhængende Digital Sundhed i Danmark (SDSD)
Publisher: name: Rigsarkivet
Year: 2022

description: Sundhedsstyrelsens sagsarkiv. Formålet med systemet er at kunne gemme og sidenhen fremsøge sager anvendt i styrelsen. Formålet er således administrativt og juridisk begrundet.
Experimental investigation of the mixing of two optical frequency EM waves in a plasma
Creators: name: Godfrey, Lawrence Allan
Publisher: name: University of British Columbia
Year: 2010

description: The effect of optical mixing of two tunable dye lasers at frequencies near the plasma frequency has been experimentally investigated in a helium plasma jet. It has been shown that the wave mixing produces longitudinal plasma oscillations at the frequency and wave vector of the mixing force. The driven waves were detected by scattering a third diagnostic light wave from their density fluctuation. The scattering signals increased to as much as seven times the signal observed when scattering from the thermal fluctuations alone. The spectrum of the spectral density function of the induced fluctuations has been measured, as well as the dependence of its amplitude on the power of the mixing light beams. These results agree well with theoretical calculations based on a simple model of the mixing effect of a single electron in the field of two electromagnetic waves. The response of the plasma to optical mixing at different frequencies has also been measured. This spectrum agrees in part with theoretical predictions, but has features not explained by the simple model.
Polynomial reformulation of the Kuo criteria for v-sufficiency of map-germs
Creators: name: Kozyakin, Victor
Publisher: name: arXiv
Year: 2009
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 58K40, 58K45, 32S15

description: In the paper a set of necessary and sufficient conditions for \textit{v-}sufficiency (equiv. \textit{sv-}sufficiency) of jets of map-germs $f:(\mathbb{R}^{n},0)\to (\mathbb{R}^{m},0)$ is proved which generalize both the Kuiper-Kuo and the Thom conditions in the function case ($m=1$) so as the Kuo conditions in the general map case ($m>1$). Contrary to the Kuo conditions the conditions proved in the paper do not require to verify any inequalities in a so-called horn-neighborhood of the (a'priori unknown) set $f^{-1}(0)$. Instead, the proposed conditions reduce the problem on \textit{v-}sufficiency of jets to evaluating the local Łojasiewicz exponents for some constructively built polynomial functions.
description: 16 pages, 25 bibliography references, corrected misprints Accepted for publication in DCDS-B, added acknowledgments to the supporting grant
Almost-Euclidean subspaces of $\ell_1^N$ via tensor products: a simple approach to randomness reduction
Creators: name: Indyk, Piotr
name: Szarek, Stanislaw
Publisher: name: arXiv
Year: 2010
Subjects: subject: Metric Geometry (math.MG)
subject: Computational Complexity (cs.CC)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 46B25, 52A21, 68P30

description: It has been known since 1970's that the N-dimensional $\ell_1$-space contains nearly Euclidean subspaces whose dimension is $Ω(N)$. However, proofs of existence of such subspaces were probabilistic, hence non-constructive, which made the results not-quite-suitable for subsequently discovered applications to high-dimensional nearest neighbor search, error-correcting codes over the reals, compressive sensing and other computational problems. In this paper we present a "low-tech" scheme which, for any $a > 0$, allows to exhibit nearly Euclidean $Ω(N)$-dimensional subspaces of $\ell_1^N$ while using only $N^a$ random bits. Our results extend and complement (particularly) recent work by Guruswami-Lee-Wigderson. Characteristic features of our approach include (1) simplicity (we use only tensor products) and (2) yielding "almost Euclidean" subspaces with arbitrarily small distortions.
description: 11 pages; title change, abstract and references added, other minor changes
Advanced localization of massive black hole coalescences with LISA
Creators: name: Lang, Ryan N.
name: Hughes, Scott A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The coalescence of massive black holes is one of the primary sources of gravitational waves (GWs) for LISA. Measurements of the GWs can localize the source on the sky to an ellipse with a major axis of a few tens of arcminutes to a few degrees, depending on source redshift, and a minor axis which is 2--4 times smaller. The distance (and thus an approximate redshift) can be determined to better than a per cent for the closest sources we consider, although weak lensing degrades this performance. It will be of great interest to search this three-dimensional `pixel' for an electromagnetic counterpart to the GW event. The presence of a counterpart allows unique studies which combine electromagnetic and GW information, especially if the counterpart is found prior to final merger of the holes. To understand the feasibility of early counterpart detection, we calculate the evolution of the GW pixel with time. We find that the greatest improvement in pixel size occurs in the final day before merger, when spin precession effects are maximal. The source can be localized to within 10 square degrees as early as a month before merger at $z = 1$; for higher redshifts, this accuracy is only possible in the last few days.
description: 11 pages, 4 figures, version published in Classical and Quantum Gravity (special issue for proceedings of 7th International LISA Symposium)
Macroscopic electromagnetic stress tensor for ionized media
Creators: name: Johnson, Robert W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Following the arguments presented by Mansuripur [Opt. Express 16, 14821-14835 (2008)], we suggest a form for the macroscopic electromagnetic stress tensor appropriate for ionized media. The generalized Lorentz force includes the effects of polarization forces as well as those on the free charge and current densities. The resulting tensor is written in terms of the fields D, B, E, and H. Its expression for a fully ionized medium subject to an external electromagnetic field is discussed, as are the plasma conservation equations. An apparatus is suggested for its experimental discrimination.
description: 16 pages, 2 figures, fixed some nonsense with the tubular source, to appear in JPP
Additional file 6 of The LINC00922 aggravates ovarian cancer progression via sponging miR-361-3p
Creators: name: Wang, Liping
name: Ren, Chenchen
name: Xu, Yajuan
name: Yang, Li
name: Chen, Yannan
name: Zhu, Yuanhang
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 6: Fig. S6. Alterations in the expression levels of miR-361-3p were identified in ES-2 and SKOV-3 cells after passing through co-transfection with sh-linc00922 along with either miR-361-3p inhibitor or NC inhibitor. sh-linc00922, LINC00922 small hairpin RNA. sh-NC, corresponding negative control of sh-linc00922. miR inh., miR-361-3p inhibitor. NC inh., corresponding negative control of miR-361-3p inhibitor. *P < 0.05, **P < 0.01, ***P < 0.001 vs. sh-linc00922 + NC inh. ###P<0.001 vs. sh-linc00922+NC inh. &&&P<0.001 vs. sh-NC + miR inhibitor.
The targum (1972:Feb. 1 - 1972:Feb. 29)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1972

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Sharpness of the percolation transition in the two-dimensional contact process
Creators: name: Berg, J. van den
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: For ordinary (independent) percolation on a large class of lattices it is well known that below the critical percolation parameter $p_c$ the cluster size distribution has exponential decay and that power-law behavior of this distribution can only occur at $p_c$. This behavior is often called ``sharpness of the percolation transition.'' For theoretical reasons, as well as motivated by applied research, there is an increasing interest in percolation models with (weak) dependencies. For instance, biologists and agricultural researchers have used (stationary distributions of) certain two-dimensional contact-like processes to model vegetation patterns in an arid landscape (see [20]). In that context occupied clusters are interpreted as patches of vegetation. For some of these models it is reported in [20] that computer simulations indicate power-law behavior in some interval of positive length of a model parameter. This would mean that in these models the percolation transition is not sharp. This motivated us to investigate similar questions for the ordinary (``basic'') $2D$ contact process with parameter $λ$. We show, using techniques from Bollobás and Riordan [8, 11], that for the upper invariant measure ${\barν}_λ$ of this process the percolation transition is sharp. If $λ$ is such that (${\barν}_λ$-a.s.) there are no infinite clusters, then for all parameter values below $λ$ the cluster-size distribution has exponential decay.
description: Published in at http://dx.doi.org/10.1214/10-AAP702 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The dependence of the gradients of oxygen and nitrogen-to-oxygen on stellar age in MaNGA galaxies
Creators: name: Zinchenko, I. A.
name: Vilchez, J. M.
name: Perez-Montero, E.
name: Sukhorukov, A. V.
name: Sobolenko, M.
name: Puertas, S. Duarte
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive the oxygen abundance (O/H), the nitrogen-to-oxygen (N/O) abundance ratio, and their corresponding radial gradients for a sample of 1431 galaxies from MaNGA DR15 survey using two different realizations of the strong line method: empirical R calibration and the Bayesian model-based {\sc HII-CHI-mistry} ({\sc HCm}) code. We find that both abundance calculation methods reveal a correlation between the O/H gradient and the stellar mass of a galaxy. This relation is non-linear, with the steepest average gradients in the intermediate mass range and flatter average gradients for high- and low-mass galaxies. The relation between the N/O gradient and the stellar mass is, on average, non-linear with the steepest gradients in the intermediate mass range ($\log(M/M_\sun) \sim 10$), flatter gradients for high-mass galaxies, and the flattest gradients for low-mass galaxies. However, the general trend of steepening N/O gradient for higher masses, reported in previous studies, remains evident. We find a dependence between the O/H and N/O gradients and the galaxy mean stellar age traced by the $D$(4000) index. For galaxies of lower masses, both gradients are, generally, steeper for intermediate values of $D$(4000) and flatter for low and high values of $D$(4000). Only the most massive galaxies do not show this correlation. We interpret this behaviour as an evolution of the metallicity gradients with the age of stellar population. Though the galaxies with a positive slope of the $D$(4000) radial gradient tend to have a flatter O/H and N/O gradients, as compared to those with a negative $D$(4000) gradient.
description: 10 pages, 11 figures. Accepted for publication in A&A
Parapiesma atriplicis
Creators: name: Heiss, Ernst
name: Eckelt, Andreas
name: Lederwasch, Manfred
name: Unterasinger, Romed
name: T, Alydidae.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Piesmatidae
Parapiesma
Parapiesma atriplicis

description: Parapiesma atriplicis (FREY- GESSNER, 1863)
BGR B u l g a r i e n: Plowdiw, Plovdiv, 4 Ex., 30.VII.1957; 3 Ex., 31.VII.1957, leg. Eckerlein H.
BIHB o s n i e n u n d H e r z o g o w i n a:TuzlaTuzla/Dobroudja, 1Ex.,leg. Montandon A.
GRC G r i e c h e n l a n d: Attika, Athen Umgebung, 2 Ex., 2.VIII.1982, leg. Scharmann K; Attika, Attika Anavyssos, 8 Ex., 12.VIII.1958, leg. Eckerlein H; Attika, Piräus, Umgebung, 1 Ex., 29. V.1939, leg. Lindberg H; Egeo, N- Ägäis Skala Kalloni / Hristou, 4 Ex., 3. V.2012, leg. Strauss G; Kreta, Kreta Paleokastro, 2 Ex., 29.IV.2015, leg. Günther H; Peloponnes, Ionian Elaea, 2 Ex., 8.VII.1999, leg. Kott P; Peloponnes Dytiki Ellada, Kap Ireo, 51 Ex., 24.IV.1994, leg. HE; Eleusis, 2 Ex., 30.III.1966, leg. Stys P.
KAZ K a s a c h s t a n: Kok-Dshigde, 1 Ex., 1.V.1927, leg. Almasy; 1 Ex., 13.VII.1962, leg. fA.
MDAM o l d a u (M o l d a w i e n): Vall.duBerlad(=Duberlad), 1Ex., 1.VIII.1893, leg. Horvath G.
MNGM o n g o l e i: 1Ex., 25.VII.1971; 1 Ex., 12.VI.1971; 3 Ex., 21.VII.1967, leg. Kerzhner I.
RUS R u s s l a n d: Krim, Tauria m. (= S-Krim), 1 Ex., 29.IX.1877, leg. Retovsky; Moskau, Bessarabia, 4 Ex., 16. V.1893, leg. fA; 1 Ex., 18.VIII.1949, leg. fA; Sarepta [Volgograd, Krasnoarmeysk], 3 Ex., 1.I.1870; 1 Ex., 1.I.1869; 2 Ex. fA; 1 Ex., 1.I.1887, leg. Becker.
description: Published as part of Heiss, Ernst, Eckelt, Andreas, Lederwasch, Manfred, Unterasinger, Romed & T, Alydidae., 2023, Die Heteropterensammlung Ernst Heiss im Tiroler Landesmuseum Ferdinandeum. Teil XI: Pentatomomorpha IV: Familien Piesmatidae, Stenocephalidae, Rhopalidae, Alydidae, pp. 423-473 in Linzer biologische Beiträge 54 (2) on page 424, DOI: 10.5281/zenodo.10414541
ISOLA Statslige Forbrugstal
Creators: Personalestyrelsen
Publisher: name: Rigsarkivet
Year: 2022

description: Registrering af faktisk lønsums- og årsværksforbrug i de centrale statslige ministerier og styrelser til brug for myndighedsopgaver ifm. opfølgning på udvikling i lønsum og
årsværk i staten, samt talgrundlag for udarbejdelse af Forslag til Finanslov, opkrævning til Fleksjobordningen med mere.
Parapiesma josifovi PERICART 1977
Creators: name: Heiss, Ernst
name: Eckelt, Andreas
name: Lederwasch, Manfred
name: Unterasinger, Romed
name: T, Alydidae.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Piesmatidae
Parapiesma
Parapiesma josifovi

description: Parapiesma josifovi PÉRICART, 1977
KORS ü d k o r e a: Daegu,Daegu, 1Ex., 13.IX.1960; 2 Ex., 14.IX.1960, leg. Lee C.E.; Seoul, Sincheon-dong, 3 Ex., 16.VIII.1981, leg. Lee C.E.
PRK N o r d k o r e a: P'yongan-namdo, Rjongaksan, 1 Ex., 30.V.1975, leg. Josifov M.
description: Published as part of Heiss, Ernst, Eckelt, Andreas, Lederwasch, Manfred, Unterasinger, Romed & T, Alydidae., 2023, Die Heteropterensammlung Ernst Heiss im Tiroler Landesmuseum Ferdinandeum. Teil XI: Pentatomomorpha IV: Familien Piesmatidae, Stenocephalidae, Rhopalidae, Alydidae, pp. 423-473 in Linzer biologische Beiträge 54 (2) on page 424, DOI: 10.5281/zenodo.10414541
Long-range dynamic correlations in confined suspensions
Creators: name: Frydel, Derek
name: Diamant, Haim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Hydrodynamic interactions between particles confined in a liquid-filled linear channel are known to be screened beyond a distance comparable to the channel width. Using a simple analytical theory and lattice-Boltzmann simulations, we show that the hydrodynamic screening is qualitatively modified when the time-dependent response and finite compressibility of the host liquid are taken into account. Diffusive compression modes in the confined liquid cause the particles to have velocity correlations of unbounded range, whose amplitude decays with time only as $t^{-3/2}$.
description: 4 pages, 3 figures
Elliptic recurrence representation of the N=1 superconformal blocks in the Ramond sector
Creators: name: Hadasz, Leszek
name: Jaskolski, Zbigniew
name: Suchanek, Paulina
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The structure of the 4-point N=1 super-conformal blocks in the Ramond sector is analyzed. The elliptic recursion relations for these blocks are derived.
description: 21 pages, no figures. An error in the description of the R-NS block of the Ramond field and all its consequences corrected
Dressing the Post-Newtonian two-body problem and Classical Effective Field Theory
Creators: name: Kol, Barak
name: Smolkin, Michael
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We apply a dressed perturbation theory to better organize and economize the computation of high orders of the 2-body effective action of an inspiralling Post-Newtonian gravitating binary. We use the effective field theory approach with the non-relativistic field decomposition (NRG fields). For that purpose we develop quite generally the dressing theory of a non-linear classical field theory coupled to point-like sources. We introduce dressed charges and propagators, but unlike the quantum theory there are no dressed bulk vertices. The dressed quantities are found to obey recursive integral equations which succinctly encode parts of the diagrammatic expansion, and are the classical version of the Schwinger-Dyson equations. Actually, the classical equations are somewhat stronger since they involve only finitely many quantities, unlike the quantum theory. Classical diagrams are shown to factorize exactly when they contain non-linear world-line vertices, and we classify all the possible topologies of irreducible diagrams for low loop numbers. We apply the dressing program to our Post-Newtonian case of interest. The dressed charges consist of the dressed energy-momentum tensor after a non-relativistic decomposition, and we compute all dressed charges (in the harmonic gauge) appearing up to 2PN in the 2-body effective action (and more). We determine the irreducible skeleton diagrams up to 3PN and we employ the dressed charges to compute several terms beyond 2PN.
description: 38 pages, 28 figures. PRD published version, added references
Higher-order spin effects in the amplitude and phase of gravitational waveforms emitted by inspiraling compact binaries: Ready-to-use gravitational waveforms
Creators: name: Arun, K. G.
name: Buonanno, Alessandra
name: Faye, Guillaume
name: Ochsner, Evan
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide ready-to-use time-domain gravitational waveforms for spinning compact binaries with precession effects through 1.5PN order in amplitude and compute their mode decomposition using spin-weighted -2 spherical harmonics. In the presence of precession, the gravitational-wave modes (l,m) contain harmonics originating from combinations of the orbital frequency and precession frequencies. We find that the gravitational radiation from binary systems with large mass asymmetry and large inclination angle can be distributed among several modes. For example, during the last stages of inspiral, for some maximally spinning configurations, the amplitude of the (2,0) and (2,1) modes can be comparable to the amplitude of the (2,2) mode. If the mass ratio is not too extreme, the l=3 and l=4 modes are generally one or two orders of magnitude smaller than the l = 2 modes. Restricting ourselves to spinning, non-precessing compact binaries, we apply the stationary-phase approximation and derive the frequency-domain gravitational waveforms including spin-orbit and spin(1)- spin(2) effects through 1.5PN and 2PN order respectively in amplitude, and 2.5PN order in phase. Since spin effects in the amplitude through 2PN order affect only the first and second harmonics of the orbital phase, they do not extend the mass reach of gravitational-wave detectors. However, they can interfere with other harmonics and lower or raise the signal-to-noise ratio depending on the spin orientation. These ready-to-use waveforms could be employed in the data-analysis of the spinning, inspiraling binaries as well as in comparison studies at the interface between analytical and numerical relativity.
description: 43 pages, 10 Postscript figures. submitted to Physical Review D. Includes corrections due to errata
Mixing angle between $^3P_1$ and $^1P_1$ in HQET
Creators: name: Matsuki, Takayuki
name: Morii, Toshiyuki
name: Seo, Kohichi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Some claim that there are two independent mixing angles ($θ= 35.3^\circ$, $-54.7^\circ$) between $^3P_1$ and $^1P_1$ states of heavy-light mesons in heavy quark symmetric limit, and others claim there is only one ($θ= 35.3^\circ$). We clarify the difference between these two and suggest which should be adopted. General arguments on the mixing angle between $^3L_L$ and $^1L_L$ of heavy-light mesons are given in HQET and a general relation is derived in heavy quark mass limit as well as that including the first order correction in $1/m_Q$.
description: 6 pages, 1 table