cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Solvability and Subellipticity of Systems of Pseudodifferential Operators
Creators: name: Dencker, Nils
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S05 (Primary) 35A07, 35H20, 47G30, 58J40 (Secondary)

description: The paper studies the local solvability and subellipticity for square systems of principal type. These are the systems for which the principal symbol vanishes of first order on its kernel. For systems of principal type having constant characteristics, local solvability is equivalent to condition (PSI) on the eigenvalues, see arXiv:0801.4043. This is a condition on the sign changes of the imaginary part of the eigenvalue along the oriented bicharacteristics of the real part. In the generic case when the principal symbol does not have constant characteristics, condition (PSI) is not sufficient, not invariant and in general not well defined. Instead we study systems which are quasi-symmetrizable, these systems have natural invariance properties and are of principal type. We prove that quasi-symmetrizable systems are locally solvable. We also study the subellipticity of quasi-symmetrizable systems in the case when principal symbol vanishes of finite order along the bicharacteristics. In order to prove subellipticity, we assume that the principal symbol has the approximation property, which implies that there are no transversal bicharacteristics.
description: Skipped erroneous Remark 2.5 and changed Definition 2.7. Corrected minor errors and misprints, added references. The paper has 21 pages
Holographic QCD and the muon anomalous magnetic moment
Creators: name: Leutgeb, Josef
name: Mager, Jonas
name: Rebhan, Anton
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously difficult to satisfy in hadronic models. This requires the summation of an infinite tower of axial vector mesons, which is naturally present in holographic QCD models, and indeed takes care of the longitudinal short-distance constraint due to Melnikov and Vainshtein. Numerically the results of simple hard-wall holographic QCD models point to larger contributions from axial vector mesons than assumed previously, while the predicted contributions from pseudo-Goldstone bosons agree nicely with data-driven approaches.
description: Review article for Eur.Phys.J.C., topical selection "New Frontiers in Holographic Duality", 18 pages, 11 figures, 4 tables (v2: references updated, typo in table 2 corrected)
Phenomenology from a U(1) gauged hidden sector
Creators: name: Chang, We-Fu
name: Ng, John N.
name: Wu, Jackson M. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the phenomenological consequences of a hidden Higgs sector extending the Standard Model (SM), in which the matter content are uncharged under the SM gauge groups. We consider a simple case where the hidden sector is gauged under a U(1) with one Higgs singlet. The only couplings between SM and the hidden sector are through mixings between the neutral gauge bosons of the two respective sectors, and between the Higgs bosons. We find signals testable at the LHC that can reveal the existence and shed light on the nature of such a hidden sector.
description: 5 pages, 2 figures. Talk given at the Lake Louise Winter Institute 2007, Feb. 19-24, Alberta, Canada
Improved Online Algorithm for Fractional Knapsack in the Random Order Model
Creators: name: Giliberti, Jeff
name: Karrenbauer, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The fractional knapsack problem is one of the classical problems in combinatorial optimization, which is well understood in the offline setting. However, the corresponding online setting has been handled only briefly in the theoretical computer science literature so far, although it appears in several applications. Even the previously best known guarantee for the competitive ratio was worse than the best known for the integral problem in the popular random order model. We show that there is an algorithm for the online fractional knapsack problem that admits a competitive ratio of 4.39. Our result significantly improves over the previously best known competitive ratio of 9.37 and surpasses the current best 6.65-competitive algorithm for the integral case. Moreover, our algorithm is deterministic in contrast to the randomized algorithms achieving the results mentioned above.
description: Accepted at WAOA 2021
Reken-Großreken – mittelsteinzeitliche Spuren als Kollateralschaden
Creators: name: Stapel, Bernhard
name: Elburg, Rengert
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Neue Ausgrabungen auf dem ehemaligen Gelände des Stalags 326 (VI K) Senne
Creators: name: Spiong, Sven
name: Nickel, Oliver
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
The predictive validity of an operational assessment centre
Creators: name: Gale, Cheryl Ann
Publisher: name: University of British Columbia
Year: 2010

description: In recent years, assessment centres have become an increasingly popular approach to selecting and promoting police managers. Yet few empirical studies have been conducted on the validity of these assessment centres. The intent of this investigation was to conduct one of the first criterion-related validity studies of an assessment centre in law enforcement. Findings indicate little predictive validity of the overall assessment centre rating (OAR) with the performance appraisal measure (r=.0784, N.S.) or with the potentiality measure (r=-.0083, N.S.). Comparison of pre vs. post assessment centre recruits shows that recruits hired after implementation of the centre are rated higher in potentiality and perform better at the academy than those hired prior to the centre. There is no difference in performance appraisal measures. The study also revealed, through multiple regression, that assessment centre dimensions of stress tolerance, interpersonal sensitivity, interpersonal tolerance, integrity, practical intelligance, problem confrontation, initiative, personal impact, and fact finding were the major determinants of overall assessment ratings. Factor analysis suggests that the assessment centre ratings actually reflect only three underlying factors: overall activity and general effectiveness, interpersonal effectiveness, and probity. Results are presented with the appropriate reservations regarding methodological weaknesses. The study should not be seen as a case study, but rather as an additional source of assessment centre information of particular interest to law enforcement agencies, and also relevant to assessment centres in general.
Luftschutz im Zweiten Weltkrieg – ein gut erhaltener Deckungsgraben in Bochum-Gerthe
Creators: name: Poggel, Thomas
name: Cramer, Lutz
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Interaction between negative and positive index medium waveguides
Creators: name: Yan, Wei
name: Shen, Linfang
name: Yuan, Yu
name: Yang, Tzong Jer
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The coupling between negative and positive index medium waveguides is investigated theoretically in this paper. A coupled mode theory is developed for such a waveguide system and its validity is verified. Interesting phenomena in the coupled waveguides are demonstrated, which occur in the case when the negative index medium waveguide in isolation guides its mode backward. A new type of coupled mode solution that varies exponentially with the coupling length is found in the special case when the propagation constants of two individual waveguides are nearly the same. A coupler operating in this case is insensitive to the coupling length, and its coupling efficiency can reach 100% as long as the coupling length is long enough. However, when the propagation constants of the two individual waveguides differ greatly, the coupled mode solution is still a periodic function of the coupling length, but the coupled power is output backward. In addition, the modes in the composite waveguide system are also studied using the coupled mode theory, and their fundamental properties are revealed.
description: 7 pages
Berühmten (Garten-)Architekten auf der Spur – Untersuchungen am Hohenhof in Hagen
Creators: name: Cichy, Eva
name: Weisser, Susanne
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
LBT Discovery of a Yellow Supergiant Eclipsing Binary in the Dwarf Galaxy Holmberg IX
Creators: name: Prieto, J. L.
name: Stanek, K. Z.
name: Kochanek, C. S.
name: Weisz, D. R.
name: Baruffolo, A.
name: Bechtold, J.
name: Burwitz, V.
name: De Santis, C.
name: Gallozzi, S.
name: Garnavich, P. M.
name: Giallongo, E.
name: Hill, J. M.
name: Pogge, R. W.
name: Ragazzoni, R.
name: Speziali, R.
name: Thompson, D. J.
name: Wagner, R. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In a variability survey of M81 using the Large Binocular Telescope we have discovered a peculiar eclipsing binary (MV ~ -7.1) in the field of the dwarf galaxy Holmberg IX. It has a period of 272 days and the light curve is well-fit by an overcontact model in which both stars are overflowing their Roche lobes. It is composed by two yellow supergiants (V-I ~ 1 mag, T_eff = 4800 K), rather than the far more common red or blue supergiants. Such systems must be rare. While we failed to find any similar systems in the literature, we did, however note a second example. The SMC F0 supergiant R47 is a bright (MV ~ -7.5) periodic variable whose All Sky Automated Survey (ASAS) light curve is well-fit as a contact binary with a 181 day period. We propose that these systems are the progenitors of supernovae like SN 2004et and SN 2006ov, which appeared to have yellow progenitors. The binary interactions (mass transfer, mass loss) limit the size of the supergiant to give it a higher surface temperature than an isolated star at the same core evolutionary stage. We also discuss the possibility of this variable being a long-period Cepheid.
description: ApJ Letters, accepted, 15 pages, 4 figures, 1 table, and 1 photometry file
Introducing a Real-time Interactive GUI Tool for Visualization of Galaxy Spectra
Creators: name: Leung, Ho-Hin
name: Wild, Vivienne
name: Carnall, Adam
name: Papathomas, Michail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: To aid the understanding of the non-linear relationship between galaxy properties and predicted spectral energy distributions (SED), we present a new interactive graphical user interface (GUI) tool pipes_vis based on Bagpipes \citep{arXiv:1712.04452,arXiv:1903.11082}. It allows for real-time manipulation of a model galaxy's star formation history, dust and other relevant properties through sliders and text boxes, with each change's effect on the predicted SED reflected instantaneously. We hope the tool will assist in building intuition about what affects the SED of galaxies, potentially helping to speed up fitting stages such as prior construction, and aid in undergraduate and graduate teaching. pipes_vis is available online (pipes_vis is maintained and documented online at https://github.com/HinLeung622/pipes_vis, or version 0.4.1 is archived in Zenodo and also available for installation through pip install pipes_vis).
description: 3 pages, 1 figure, Research Notes of the AAS accepted
Period problems for mean curvature one surfaces in $H^3$ (with application to surfaces of low total curvature)
Creators: name: Rossman, Wayne
name: Umehara, Masaaki
name: Yamada, Kotaro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A10; 53A35; 53A42

description: We review recent results on classifying complete constant mean curvature 1 (CMC 1) surfaces in hyperbolic 3-space with low total curvature. There are two natural notions of "total curvature" -- one is the total absolute curvature, which is the integral over the surface of the absolute value of the Gaussian curvature, and the other is the dual total absolute curvature, which is the total absolute curvature of the dual CMC 1 surface. Here we discuss results on both notions (proven in two other papers by the authors), and we introduce new results as well.
Glasmachertradition und Industriearchäologie in Bad Driburg
Creators: name: Grundmann, Birgit
name: Wunschel, Andreas
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
The magnetic field topology in the reconnecting pulsar magnetosphere
Creators: name: Contopoulos, Ioannis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that toroidal magnetic field annihilation in the equatorial current sheet of the pulsar magnetosphere is related to how fast poloidal magnetic field lines close as we move away from the light cylinder. This determines the reconnection radial electric field which directly accelerates particles in the neutral layer inside the equatorial current sheet. The efficiency of poloidal magnetic field closure near the light cylinder may be measurable through the pulsar braking index. We argue that, the lower the efficiency of pair formation, the higher the braking index. We also argue that synchrotron radiation reaction in the neutral layer does not inhibit the accelerated particles from reaching the maximum energy of about 10^16 eV available in the open pulsar magnetosphere.
description: Accepted for publication in Astronomy and Astrophysics
Electroweak Sudakov Corrections using Effective Field Theory
Creators: name: Chiu, Jui-yu
name: Golf, Frank
name: Kelley, Randall
name: Manohar, Aneesh V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Electroweak Sudakov corrections of the form alpha^n log^m s/M_{W,Z}^2 are summed using renormalization group evolution in soft-collinear effective theory (SCET). Results are given for the scalar, vector and tensor form-factors for fermion and scalar particles. The formalism for including massive gauge bosons in SCET is developed.
description: 5 pages
Extending the Coinvariant Theorems of Chevalley, Shephard--Todd, Mitchell and Springer
Creators: name: Broer, Abraham
name: Reiner, Victor
name: Smith, Larry
name: Webb, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 13A50

description: We extend in several directions invariant theory results of Chevalley, Shephard and Todd, Mitchell and Springer. Their results compare the group algebra for a finite reflection group with its coinvariant algebra, and compare a group representation with its module of relative coinvariants. Our extensions apply to arbitrary finite groups in any characteristic.
description: The applications and Examples in section 4 have been extended
»Unechtes Porcellain« – niedersächsische Fayencen des 18. Jahrhunderts aus Höxter
Creators: name: König, Andreas
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Poincaré series for modular graph forms at depth two. I. Seeds and Laplace systems
Creators: name: Dorigoni, Daniele
name: Kleinschmidt, Axel
name: Schlotterer, Oliver
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We derive new Poincaré-series representations for infinite families of non-holomorphic modular invariant functions that include modular graph forms as they appear in the low-energy expansion of closed-string scattering amplitudes at genus one. The Poincaré series are constructed from iterated integrals over single holomorphic Eisenstein series and their complex conjugates, decorated by suitable combinations of zeta values. We evaluate the Poincaré sums over these iterated Eisenstein integrals of depth one and deduce new representations for all modular graph forms built from iterated Eisenstein integrals at depth two. In a companion paper, some of the Poincaré sums over depth-one integrals going beyond modular graph forms will be described in terms of iterated integrals over holomorphic cusp forms and their L-values.
description: 90+25 pages. Part I of a series of two papers together with arXiv:2109.05018. Submission includes an ancillary data file. v2: expanded introduction. v3: JHEP version
Gartenarchäologie bei Schloss Raesfeld – mehr als die Summe der Teile
Creators: name: Coolen, Joris
name: Eßer, Britta
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
$α'$-corrections to Near Extremal Dyonic Strings and Weak Gravity Conjecture
Creators: name: Ma, Liang
name: Pang, Yi
name: Lü, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct non-extremal dyonic string solutions in 6D minimal supergravity where the leading higher derivative corrections arise from either the type IIA string theory compactified on K3 or the heterotic string theory compactified on 4-torus. The thermodynamical quantities and Euclidean actions of the strings are computed. In the near extremal regime, we calculate the force felt by a probe fundamental string in the background of the macroscopic dyonic string with leading $α'$ corrections. We find that in both the IIA and heterotic setups, away from extremality, the attractive force overwhelms the repulsive force. However, close to extremality, the $α'$ corrections can reduce the attractive force in the isoentropic process, where the charges are fixed. This feature may be used as a new constraint for supergravity models with consistent quantum gravity embedding, in cases where the extremal limit coincides with the BPS limit and the higher derivative corrections do not affect the mass-to-charge ratio. By contrast, the $α'$ corrections can enhance the attractive force in the isothermal or isoenergetic processes.
description: 29 pages, discussions and references added, to appear in JHEP
Poincaré series for modular graph forms at depth two. II. Iterated integrals of cusp forms
Creators: name: Dorigoni, Daniele
name: Kleinschmidt, Axel
name: Schlotterer, Oliver
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We continue the analysis of modular invariant functions, subject to inhomogeneous Laplace eigenvalue equations, that were determined in terms of Poincaré series in a companion paper. The source term of the Laplace equation is a product of (derivatives of) two non-holomorphic Eisenstein series whence the modular invariants are assigned depth two. These modular invariant functions can sometimes be expressed in terms of single-valued iterated integrals of holomorphic Eisenstein series as they appear in generating series of modular graph forms. We show that the set of iterated integrals of Eisenstein series has to be extended to include also iterated integrals of holomorphic cusp forms to find expressions for all modular invariant functions of depth two. The coefficients of these cusp forms are identified as ratios of their L-values inside and outside the critical strip.
description: 43+8 Pages. Part II of a series of two papers together with arXiv:2109.05017. Submission includes an ancillary data file. v2: expanded introduction. v3: JHEP version
Cosmological search for sterile neutrinos after Planck 2018
Creators: name: Feng, Lu
name: Guo, Rui-Yun
name: Zhang, Jing-Fei
name: Zhang, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Sterile neutrinos can affect the evolution of the universe, and thus using the cosmological observations can search for sterile neutrinos. In this work, we use the cosmic microwave background (CMB) anisotropy data from the Planck 2018 release, combined with the latest baryon acoustic oscillation (BAO), type Ia supernova (SN), and Hubble constant ($H_0$) data, to constrain the cosmological models with considering sterile neutrinos. In order to test the influences of the properties of dark energy on the {results} of searching for sterile neutrinos, in addition to the $Λ$ cold dark matter ($Λ$CDM) model, we also consider the $w$CDM model and the holographic dark energy (HDE) model. We find that the existence of sterile neutrinos {is not preferred} when the $H_0$ local measurement is not included in the data combination. When the $H_0$ measurement is included in the joint constraints, it is found that $ΔN_{\rm eff}>0$ is {favored} at about 2.7$σ$ level for the $Λ$CDM model and at about 1-1.7$σ$ level for the $w$CDM model. However, $m_{ν,{\rm{sterile}}}^{\rm{eff}}$ still cannot be well constrained and only upper limits can be given. In addition, we find that the HDE model is definitely ruled out by the current data. We also discuss the issue of the Hubble tension, and we conclude that involving sterile neutrinos in the cosmological models cannot truly resolve the Hubble tension.
description: 8 pages, 2 figures; accepted for publication in Physics Letters B
Computer simulations of melts of ring polymers with non-conserved topology: A dynamic Monte Carlo lattice model
Creators: name: Ubertini, Mattia Alberto
name: Rosa, Angelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present computer simulations of a dynamic Monte Carlo algorithm for polymer chains on the FCC lattice which takes explicitly into account the possibility to overcome topological constraints by controlling the rate at which nearby polymer strands may cross through each other. By applying the method to systems of interacting ring polymers at melt conditions, we characterize their structure and dynamics by measuring, in particular, the amounts of knots and links which are formed during the relaxation process. In comparison to standard melts of unknotted and unconcatenated rings, our simulations demonstrate that the mechanism of strand crossing is responsible for fluidizing the melt provided the time scale of the process is faster than the internal relaxation of the chain, in agreement with recent experiments employing solutions of DNA rings in the presence of the type II topoisomerase enzyme. In the opposite case of slow rates the melt is shown to become slower, and this prediction may be easily validated experimentally.
description: 12 pages, 9 figures in the main text, 8 supplementary figures. Submitted for publication
Monopole operators and symmetry enhancement in ABJM theory revisited
Creators: name: Hu, Shan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct monopole operators for 3d Yang-Mills-matter theories and Chern-Simons-matter theories in canonical formalism. In this framework, monopole operators, although as the disorder operators, could be written in terms of the fundamental fields of the theory, and thus could be treated in the same way as the ordinary operators. We study the properties of the constructed monopole operators. In Chern-Simons-matter theories, monopole operators transform as the local operators with the classical conformal dimension $ 0 $ under the action of the dilation and are also covariantly constant. In supersymmetric Chern-Simons-matter theories like the ABJM model, monopole operators commute with all of the supercharges, and thus are SUSY invariant. ABJM model with level $ k=1,2 $ is expected to have enhanced $SO(8) $ R-symmetry due to the existence of the conserved extra R-symmetry currents $ j^{AB}_μ $ involving monopoles. With the explicit form of the monopole operators given, we prove the current conservation equation $\partial^μ j^{AB}_μ =0$ using the equations of motion. We also compute the extra $ \mathcal{N}=2 $ supercharges, derive the extra $ \mathcal{N}=2 $ SUSY transformation rules, and verify the closure of the $ \mathcal{N}=8 $ supersymmetry.
description: 51 pages, v3: published version
Non-Gaussianity analysis on local morphological measures of WMAP data
Creators: name: Wiaux, Y.
name: Vielva, P.
name: Barreiro, R. B.
name: Martinez-Gonzalez, E.
name: Vandergheynst, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The decomposition of a signal on the sphere with the steerable wavelet constructed from the second Gaussian derivative gives access to the orientation, signed-intensity, and elongation of the signal's local features. In the present work, the non-Gaussianity of the WMAP temperature data of the cosmic microwave background (CMB) is analyzed in terms of the first four moments of the statistically isotropic random fields associated with these local morphological measures, at wavelet scales corresponding to angular sizes between 27.5 arcminutes and 30 degrees on the celestial sphere. While no detection is made neither in the orientation analysis nor in the elongation analysis, a strong detection is made in the excess kurtosis of the signed-intensity of the WMAP data. The non-Gaussianity is observed with a significance level below 0.5% at a wavelet scale corresponding to an angular size around 10 degrees, and confirmed at neighbour scales. This supports a previous detection of an excess of kurtosis in the wavelet coefficient of the WMAP data with the axisymmetric Mexican hat wavelet (Vielva et al. 2004). Instrumental noise and foreground emissions are not likely to be at the origin of the excess of kurtosis. Large-scale modulations of the CMB related to some unknown systematics are rejected as possible origins of the detection. The observed non-Gaussianity may therefore probably be imputed to the CMB itself, thereby questioning the basic inflationary scenario upon which the present concordance cosmological model relies. Taking the CMB temperature angular power spectrum of the concordance cosmological model at face value, further analysis also suggests that this non-Gaussianity is not confined to the directions on the celestial sphere with an anomalous signed-intensity.
description: 10 pages, 3 figures. Version 2 includes minor changes to match version accepted for publication in MNRAS
Reliable Linearized Phase Retrieval for Near-Field Antenna Measurements with Truncated Measurement Surfaces
Creators: name: Paulus, Alexander
name: Knapp, Josef
name: Kornprobst, Jonas
name: Eibert, Thomas F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Numerical Analysis (math.NA)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Most methods tackling the phase retrieval problem of magnitude-only antenna measurements suffer from unrealistic sampling requirements, from unfeasible computational complexities, and, most severely, from the lacking reliability of nonlinear and nonconvex formulations. As an alternative, we propose a partially coherent (PC) multi-probe measurement technique and an associated linear reconstruction method which mitigate all these issues. Hence, reliable and accurate phase retrieval can be achieved in near-field far-field transformations (NFFFTs). In particular, we resolve the issues related to open measurement surfaces (as they may emerge in drone-based measurement setups) and we highlight the importance of considering the measurement setup and the phaseless NFFFT simultaneously. Specifically, the influence of special multi-probe arrangements on the reconstruction quality of PC solvers is shown.
description: 6 pages, 5 figures, accepted by IEEE Transaction and Antennas and Propagation
Fachwerkhaus, Hotel, Seniorentagesstätte – Ausgrabungen im Ortskern von Horstmar
Creators: name: Becker, Dennis
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
On the Percolation BCFT and the Crossing Probability of Watts
Creators: name: Ridout, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The logarithmic conformal field theory describing critical percolation is further explored using Watts' determination of the probability that there exists a cluster connecting both horizontal and vertical edges. The boundary condition changing operator which governs Watts' computation is identified with a primary field which does not fit naturally within the extended Kac table. Instead a "shifted" extended Kac table is shown to be relevant. Augmenting the previously known logarithmic theory based on Cardy's crossing probability by this field, a larger theory is obtained, in which new classes of indecomposable rank-2 modules are present. No rank-3 Jordan cells are yet observed. A highly non-trivial check of the identification of Watts' field is that no Gurarie-Ludwig-type inconsistencies are observed in this augmentation. The article concludes with an extended discussion of various topics related to extending these results including projectivity, boundary sectors and inconsistency loopholes.
description: 23 pages, 6 figures, some changes to discussion and fixed typos in referencing (final NPB version)
Identification of oil starvation in hydrodynamic journal bearing using rotor vibration and Extended Kalman Filter
Creators: name: Oliveira, Marcus Vinícius Medeiros
name: Fioravanti, André Ricardo
name: Daniel, Gregory Bregion
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Oil starvation is a critical fault in hydrodynamic bearings caused by insufficient oil supply flowrate. When late detected, this fault can deteriorate the bearings' performance and damage the rotating machine. Thus, early fault identification techniques should be applied to avoid this scenario and allow effective maintenance. However, the literature about the identification of oil starvation fault is relatively recent and very scarce. Among the few studies available, oil starvation has been identified in early stages using a purely deterministic technique, which can be jeopardized by model inaccuracy. Alternatively, this paper proposes a novel method for the identification of oil starvation faults in hydrodynamic bearings using the rotor vibrational responses and the Extended Kalman Filter (EKF), which is a stochastic-determinist state estimator that can deal with modelling and measurement errors. Computational simulations performed in this paper show that the proposed method is suitable to successfully identify the oil starvation faults in real-time even with noisy vibrational responses, thus representing a promising tool for the monitoring of rotating machines.
Women bank managers in British Columbia
Creators: name: Egri, Carolyn Patricia
Publisher: name: University of British Columbia
Year: 2010

description: This study investigated the personal history, psychological dimensions, and career experiences of Canadian female bank managers. As part of a larger research project on bank managers conducted by Dr. L.F. Moore and Dr. B. Beck of the University of British Columbia, this thesis focussed primarily on the sex-based differences between male and female branch bank managers. Personal interview and mail-back questionnaire data were obtained from 68 male and 41 female branch managers located in the Lower Mainland of B.C. The five largest Canadian chartered banks and one western regional bank participated in the study. Analysis of the demographic characteristics of female bank managers revealed that they came from predominantly rural, blue-collar families. A substantial proportion of female managers were not married (unlike male bank managers) and tended to have few, if any, children. Female bank managers had less formal education than male managers in terms of academic achievement and attendance on bank training courses. Concerning motivational needs, female managers closely resembled male managers, exhibiting a high need for achievement, high need for power, and low need for affiliation. The female managers' managerial style conception differed significantly from that of their male colleagues. In their attributions of leadership behaviour for a "typical" bank manager, female managers often chose a consultative, communications approach. Male managers, however, more often selected a directive style consistent with traditional leadership style conception. Female managers held a higher interpersonal orientation than male managers. They, also stressed social and interpersonal values more than male managers. In terms of career experience variables, female and male managers have equivalent total years of experience in banking, however, female managers have significantly fewer years in managerial level positions. They are also working in the smaller retail-type bank branches unlike male managers who are in larger retail and commercial branches. Although the majority have experienced sex-based discrimination in their careers, female managers are generally optimistic about the future of women in banking management.
Ein Bergfried unter Wasser – Schloss Gronau taucht wieder auf
Creators: name: Essling-Wintzer, Wolfram
name: Golüke, Christian
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Genetically regulated gene expression underlies lipid traits in Hispanic cohorts
Creators: name: Andaleon, Angela
name: Mogil, Lauren
name: Wheeler, Heather
Publisher: name: F1000 Research Limited
Year: 2019

description: Plasma lipid levels are risk factors for cardiovascular disease, a leading cause of death worldwide. While many studies have been conducted in genetic variation underlying lipid levels, they mainly comprise individuals of European ancestry and thus their transferability to non-European populations is unclear. We performed genome-wide (GWAS) and imputed transcriptome-wide association studies of four lipid traits in the Hispanic Community Health Study/Study of Latinos cohort (HCHS/SoL, n = 11,103), replicated in the Multi-Ethnic Study of Atherosclerosis (MESA, n = 3,855), and compared the results to the larger, predominantly European ancestry meta-analysis by the Global Lipids Genetics Consortium (GLGC, n = 196,475). GWAS revealed SNPs in regions within or near known lipid and admixture mapping did not find significant associations between local ancestry and lipid phenotypes. In the imputed transcriptome-wide association study in multiple tissues and in different ethnicities, we found 59 significant gene-tissue-phenotype associations (P < 3.61×10−8) with 14 unique significant genes, many of which occurred across multiple phenotypes, tissues, and ethnicities and replicated in MESA (45/59) and in GLGC (44/59). These include well-studied lipid genes such as SORT1, CETP, and PSRC1, as well as genes that have been implicated in cardiovascular phenotypes, such as CCL22 and ICAM1. The majority (40/59) of significant associations colocalized with expression quantitative trait loci (eQTLs), indicating a possible mechanism of gene regulation in lipid level variation. To fully characterize the genetic architecture of lipid traits in diverse populations, larger studies in non-European ancestry populations are needed.
Der »schiefe Turm« der Vredener Bischofsburg
Creators: name: Grundmann, Birgit
name: Wegener, Kim
name: Wunschel, Andreas
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Further Development of the Tetron Model
Creators: name: Lampe, Bodo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: After a prologue which clarifies some issues left open in my last paper, the main features of the tetron model of elementary particles are discussed in the light of recent developments, in particular the formation of strong and electroweak vector bosons and a microscopic understanding of how the observed tetrahedral symmetry of the fermion spectrum may arise.
description: 24 pages, 5 tables
Ein Münzschatzfund der 1350/1360er-Jahre aus Lengerich
Creators: name: Kötz, Stefan
name: Pogarell, Thomas
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Increased Asymmetry of Pit-Over-Peak Statistics with Landscape Smoothing
Creators: name: Anand, Shashank Kumar
name: Porporato, Amilcare
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The local extremes (i.e., peaks and pits) of the landscape-elevation field play a critical role in energy, water, and nutrient distribution over the region, but the statistical distributions of these points in relation to landscape advancing towards maturity have received limited research attention. In this work, we first explain how the spatial correlation structure of the elevation field affects the counts and frequency distributions of local extremes. We then analyze local extremes statistics for 8 mountainous landscapes worldwide with diverse hydroclimatic forcings and geologic histories using 24 Digital Elevation Models (DEMs) and compare them with complex terrain of the Erythraeum Chaos region on Mars. The results reveal that the spherical covariance structure captures the observed spatial correlation in these cases with the peak frequency distribution agreeing well with the elevation frequency distribution. The ratio of the pit-over-peak (POP) count is linked to the degree to which the pit and peak frequency distributions match, and carries the mark of landscape aging. The relationship between the geomorphic development stage (quantified by the reduced fatness of the slope-distribution tail) and the deviation of POP values from unity in old mountainous landscapes confirms that the evolution towards smoother topographies is atypically accompanied by reduced pit counts typical of organized valley and ridge patterns.
Classification of nuclear receptor binding sites involved in hepatic Cytochrome P450 gene regulation
Creators: name: Kana, Omar
name: Sudin Bhattacharya
Publisher: name: F1000 Research Limited
Year: 2019

description: The liver is the central processing hub of xenobiotic chemicals and drugs in the human body. A handful of Cytochrome P450 (CYP) enzymes: CYP3A4, CYP2C9, CYP2C8, CYP2E1, CYP1A2, CYP2A6, CYP2D6, CYP2B6, CYP2C19, CYP3A5, CYP2J2, CYP1A1 and CYP1B1, account for more than 90% of liver xenobiotic metabolism. Expression of CYP genes is regulated by a network of hepatic transcription factors and nuclear receptors including hepatocyte nuclear factor-4-alpha (HNF4a), pregnane X receptor (PXR), peroxisome proliferating factor alpha (PPAR), and retinoic X receptor (RXR).  Recent efforts to make publicly available functional genomic data has allowed for a more systems approach to understanding this regulation.  In this work we have developed a predictive model to identify and characterize the differences between direct binding sites of HNF4, PXR, PPAR, and RXR. Using the nuclear receptors listed above as model regulators of CYP gene expression, we have developed a machine learning pipeline to catalogue and classify putative transcription factor DNA binding sites linked to CYP genes by leveraging information from motif DNA accessibility, and Chip-Seq data. To explore the protein-DNA interaction landscape of these regulators we explored encoding and classfication of DNA sequences using natural language processing algorithms and compared dimensionality reduction techniques to validate and visualize our findings. We then leveraged our models to enrich for novel features that distinguish these nuclear receptor binding sites from one another, develop a CYP regulatory network for non-coding DNA, and illuminate the implications of different modes of binding (direct and indirect) on chromatin and transcription. This work provides a foundation for future work in exploring the systems response of the liver to several significant xenobiotic chemicals of immediate public health interest
Dynamics, symmetries, anomaly and vortices in a rotating cosmic string background
Creators: name: Inzunza, Luis
name: Plyushchay, Mikhail S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-relativistic conformally invariant systems in a rotating cosmic string (conical) spacetime are analyzed at the classical and quantum levels by means of the gravitoelectromagnetic interpretation of the background. Solutions of the equations of motion are found by employing a local canonical transformation, that leads to their natural interpretation in terms of Riemann surfaces. The cone parameter $α$ and the angular velocity $Ω$ of the background determine the existence of hidden symmetries. Globally defined higher order integrals associated with perihelion of geodesic orbits appear at rational values of $α$. For the harmonic oscillator system with frequency $ω$, the integrals responsible for the trajectory closure arise only for rational values of $α$ and $|γ|=|Ω/ω|$, with $|γ|=1$ corresponding to the Landau problem. We face a quantum anomaly problem since the hidden symmetry operators can only be constructed when $α$ is integer. Such operators are non-local in the case of the free particle. For the harmonic oscillator, the symmetry generators are obtained with the help of the conformal bridge transformation. We also study a multi-particle version of the harmonic oscillator system with $|γ|=1$ using the mean-field theory and find that the emerging vortex structure respects a singular point of the background.
description: 39 pages
Compact Objects by Gravitational Decoupling in f(R) Gravity
Creators: name: Sharif, M.
name: Aslam, Mariyah
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The objective of this paper is to discuss anisotropic solutions representing static spherical self-gravitating systems in $f(R)$ theory. We employ the extended gravitational decoupling approach and transform temporal as well as radial metric potentials which decomposes the system of non-linear field equations into two arrays: one set corresponding to seed source and the other one involves additional source terms. The domain of the isotropic solution is extended in the background of $f(R)$ Starobinsky model by employing the metric potentials of Krori-Barua spacetime. We determine two anisotropic solutions by employing some physical constraints on the extra source. The values of unknown constants are computed by matching the interior and exterior spacetimes. We inspect the physical viability, equilibrium and stability of the obtained solutions corresponding to the star Her X-I. It is observed that one of the two extensions satisfies all the necessary physical requirements for particular values of the decoupling parameter.
description: 30 pages, 10 figures
Cranked Skyrme-Hartree-Fock-Bogoliubov approach for a mean-field description of nuclear rotations near the drip line
Creators: name: Yoshida, Kenichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: To describe the yrast states in weakly bound nuclei, I directly solve the coordinate-space cranked Skyrme-Hartree-Fock-Bogoliubov equation on a three-dimensional lattice with the continuum states discretized in a box. After the numerical demonstration for the ground-state band in a medium-mass nucleus, I apply the newly-developed method to neutron-rich even-$N$ Mg isotopes. I find that the appearance of the significantly low $I^π=2^+$ state in $^{40}$Mg is mainly due to the suppression of pairing. The calculation predicts that the $2^+$ state in $^{42}$Mg appears as high in energy as in $^{34\text{-}38}$Mg whereas the triaxial deformation is enhanced in non-zero spin states. The present numerical framework offers a practical approach for investigating the near yrast states systematically and revealing structures unique in drip-line nuclei.
description: 7 pages, 5 figures; accepted version
»oppidum nostrum firmaremus, castro (…) excluso« – Burg und Befestigung Schmallenberg
Creators: name: Essling-Wintzer, Wolfram
name: Wegener, Kim
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)
Massive color-octet bosons and pairs of resonances at hadron colliders
Creators: name: Dobrescu, Bogdan A.
name: Kong, Kyoungchul
name: Mahbubani, Rakhi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze collider signatures of massive color-octet bosons whose couplings to quarks are suppressed. Gauge invariance forces the octets to couple at tree level only in pairs to gluons, with a strength set by the QCD gauge coupling. For a spin-1 octet, the cross section for pair production at hadron colliders is larger than that for a quark of equal mass. The octet decays into two jets, leading to a 4-jet signature with two pairs of jets forming resonances of the same mass. For a spin-0 octet the cross section is smaller, and the dominant decay is into b\bar{b}, or t\bar{t} if kinematically allowed. We estimate that discovery of spin-1 octets is possible for masses up to 330 GeV at the Tevatron, and 1 TeV at the LHC with 1 fb^{-1}, while the reach is somewhat lower for spin-0 octets.
description: 5 pages, 3 ps figures. v2: minor changes, figures 3 and 4 replaced and references added; v3 (appeared in Phys. Lett. B): explanation of model expanded; added figure containing invariant mass distributions for signal and background at the LHC; reach for spin-0 octet reduced slightly by requiring at least 10 signal events
Von historischen Thesen und archäologischen Belegen – die Wurzeln der Stadt Borgentreich
Creators: name: Jürgens, Fritz
name: Müller, Ulrich
name: Wolpert, Nils
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2021

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2019 (2020)