cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Parabolic Induction via the Parabolic pro-$p$ Iwahori--Hecke Algebra
Creators: name: Heyer, Claudius
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11E95, 20C08, 20G25

description: Let $\mathbf{G}$ be a connected reductive group defined over a locally compact non-archimedean field $F$, let $\mathbf{P}$ be a parabolic subgroup with Levi $\mathbf{M}$ and compatible with a pro-$p$ Iwahori subgroup of $G := \mathbf{G}(F)$. Let $R$ be a commutative unital ring. We introduce the parabolic pro-$p$ Iwahori--Hecke $R$-algebra $\mathcal{H}_R(P)$ of $P := \mathbf{P}(F)$ and construct two $R$-algebra morphisms $Θ^P_M\colon \mathcal{H}_R(P)\to \mathcal{H}_R(M)$ and $Ξ^P_G\colon \mathcal{H}_R(P) \to \mathcal{H}_R(G)$ into the pro-$p$ Iwahori--Hecke $R$-algebra of $M := \mathbf{M}(F)$ and $G$, respectively. We prove that the resulting functor Mod-$\mathcal{H}_R(M) \to$ Mod-$\mathcal{H}_R(G)$ from the category of right $\mathcal{H}_R(M)$-modules to the category of right $\mathcal{H}_R(G)$-modules (obtained by pulling back via $Θ^P_M$ and extension of scalars along $Ξ^P_G$) coincides with the parabolic induction due to Ollivier--Vignéras. The maps $Θ^P_M$ and $Ξ^P_G$ factor through a common subalgebra $\mathcal{H}_R(M,G)$ of $\mathcal{H}_R(G)$ which is very similar to $\mathcal{H}_R(M)$. Studying these algebras $\mathcal{H}_R(M,G)$ for varying $(M,G)$ we prove a transitivity property for tensor products. As an application we give a new proof of the transitivity of parabolic induction.
description: 36 pages, published version. Added Lemma 3.3 and the example after Proposition 3.4; fixed some misprints. Comments welcome!
As escolas e a autonomia – conclusões de um estudo de caso
Creators: name: Ribeiro, Elsa
name: Machado, Joaquim
Publisher: name: Gestão e Desenvolvimento
Year: 2011

description: A governação das escolas em Portugal tem hoje um "regime de autonomia, administração e gestão". Contudo, o peso do Estado centralizador e as poucas alterações entretanto ocorridas na administração das escolas portuguesas, faz da autonomia uma temática muito abordada em sede discursiva, mas com reduzida aplicação na prática. Revisitamos o percurso que as escolas tiveram de percorrer para contratualizarem a autonomia com a tutela, desde a avaliação externa até à celebração do contrato de autonomia, uma vontade contratualizada. Procedemos ao estudo empírico, com recurso a uma metodologia de investigação qualitativa, efetuámos um estudo de caso numa escola secundária, situada na zona norte, que celebrou em 2007 um contrato de autonomia, procurando compreender o impacto da governação por contrato na escola e as conceções dos atores educativos sobre autonomia contratualizada.
description: Gestão e Desenvolvimento, n. 19 (2011)
Origin of the Weak Pseudo-gap Behaviors in Na_{0.35}CoO_2: Absence of Small Hole Pockets
Creators: name: Yada, Keiji
name: Kontani, Hiroshi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We analyze the ``normal electronic states'' of Na_{0.35}CoO_2 based on the effective d-p model with full d-orbital freedom using the fluctuation-exchange (FLEX) approximation. They sensitively depend on the topology of the Fermi surfaces, which changes as the crystalline electric splitting (CES) due to the trigonal deformation. We succeed in reproducing the weak pseudo-gap behaviors in the density of states (DOS) and in the uniform magnetic susceptibility below 300K, assuming that six small hole-pockets predicted by LDA band calculations are absent. When they exist, on the contrary, then ``anti-pseudo-gap behaviors'' should inevitably appear. Thus, the present study strongly supports the absence of the small hole-pockets in Na_{0.35}CoO_2, as reported by recent ARPES measurements. A large Fermi surface around the Γ-point would account for the superconductivity in water-intercalated samples.
description: 5pages, to appear in J. Phys. Soc. Jpn. Vol.74 (2005) No.8
DYNAMIC ANALYSIS WITH TIME SERIES MODELS: SIMULATION AND EMPIRICAL EVIDENCE
Creators: name: Robledo, Carlos W.
name: Zapata, Hector O.
name: Robledo, Carlos W.
name: Zapata, Hector O.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Research Methods/ Statistical Methods
subject: Statistical selection criteria
subject: cointegration
subject: mixed unit roots
subject: impulse response functions
subject: small sample properties

description: The performance of the FPE, AIC, HQ and SC criteria in choosing lag-length, and the effect on the impulse-response functions, are studied in a Monte Carlo simulation. The experiments include stationary, cointegrated, and mixed unit root VAR and MA cases.
Quantum information in Hawking radiation
Creators: name: Aurell, Erik
name: Eckstein, Michał
name: Horodecki, Paweł
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 83C57, 81P45, 81V80

description: In 1974 Steven Hawking showed that black holes emit thermal radiation, which eventually causes them to evaporate. The problem of the fate of information in this process is known as the "black hole information paradox". Two main types of resolution postulate either a fundamental loss of information in Nature -- hence the breakdown of quantum mechanics -- or some sort of new physics, e.g. quantum gravity, which guarantee the global preservation of unitarity. Here we explore the second possibility with the help of recent developments in continuous-variable quantum information. Concretely, we employ the solution to the Gaussian quantum marginal problem to show that the thermality of all individual Hawking modes is consistent with a global pure state of the radiation. Surprisingly, we find out that the mods of radiation of an astrophysical black hole are thermal until the very last burst. In contrast, the single-mode thermality of Hawking radiation originating from microscopic black holes, expected to evaporate through several quanta, is not excluded, though there are constraints on modes' frequencies. Our result paves the way towards a systematic study of multi-mode correlations in Hawking radiation.
description: 13 pages, 1 figure. Version published in JCAP
Tight-Binding model for semiconductor nanostructures
Creators: name: Schulz, Stefan
name: Czycholl, Gerd
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: An empirical $s_cp^3_a$ tight-binding (TB) model is applied to the investigation of electronic states in semiconductor quantum dots. A basis set of three $p$-orbitals at the anions and one $s$-orbital at the cations is chosen. Matrix elements up to the second nearest neighbors and the spin-orbit coupling are included in our TB-model. The parametrization is chosen so that the effective masses, the spin-orbit-splitting and the gap energy of the bulk CdSe and ZnSe are reproduced. Within this reduced $s_cp_a^3$ TB-basis the valence (p-) bands are excellently reproduced and the conduction (s-) band is well reproduced close to the $Γ$-point, i.e. near to the band gap. In terms of this model much larger systems can be described than within a (more realistic) $sp^3s^*$-basis. The quantum dot is modelled by using the (bulk) TB-parameters for the particular material at those sites occupied by atoms of this material. Within this TB-model we study pyramidal-shaped CdSe quantum dots embedded in a ZnSe matrix and free spherical CdSe quantum dots (nanocrystals). Strain-effects are included by using an appropriate model strain field. Within the TB-model, the strain-effects can be artifically switched off to investigate the infuence of strain on the bound electronic states and, in particular, their spatial orientation. The theoretical results for spherical nanocrystals are compared with data from tunneling spectroscopy and optical experiments. Furthermore the influence of the spin-orbit coupling is investigated.
AGRICULTURAL HOUSEHOLD MODEL WITH WAGE UNCERTAINTY: AN APPLICATION TO SUBSIDIARY POST-SOVIET AGRICULTURE
Creators: name: Kurkalova, Lyubov A.
name: Jensen, Helen H.
name: Kurkalova, Lyubov A.
name: Jensen, Helen H.
Publisher: name: Unknown
Year: 1999
Subjects: Consumer/Household Economics
Labor and Human Capital

description: The labor supply decision under wage uncertainty is studied in the context of an agricultural household model. The recent sharp growth of post-Soviet subsidiary subsistence agriculture is consistent with the model predictions of an increase in farm labor supply in response to the fall and uncertainty in real wage.
Monte Carlo simulations of liquid crystals near rough walls
Creators: name: Cheung, David
name: Schmid, Friederike
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of surface roughness on the structure of liquid crystalline fluids near solid substrates is studied by Monte Carlo simulations. The liquid crystal is modelled as a fluid of soft ellipsoidal molecules and the substrate is modelled as a hard wall that excludes the centres of mass of the fluid molecules. Surface roughness is introduced by embedding a number of molecules with random positions and orientations within the wall. It is found that the density and order near the wall are reduced as the wall becomes rougher (i.e. the number of embedded molecules is increased). Anchoring coefficients are determined from fluctuations in the reciprocal space order tensor. It is found that the anchoring strength decreases with increasing surface roughness.
description: to appear in J. Chem. Phys
Die römisch-katholische Kirche und die Weltkirchenkonferenz von Uppsala 1968
Creators: name: Fries, Heinrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 17 Nr. 2 (1968): Ökumenische Rundschau, Band 17, Heft 2
WELFARE DIFFERENCES BETWEEN GROSS WATER PUMPED AND CONSUMPTIVE USE AS ALTERNATIVE POLICY CONTROL VARIABLES TO MEET AQUIFER MANAGEMENT OBJECTIVES
Creators: name: Yeboah, Osei-Agyeman
name: Supalla, Raymond J.
name: Martin, Derrel L.
name: Yeboah, Osei-Agyeman
name: Supalla, Raymond J.
name: Martin, Derrel L.
Publisher: name: Unknown
Year: 1999
Subjects: Resource /Energy Economics and Policy

description: The welfare cost of using gross water pumped instead of consumptive use as a control variable to meet consumptive use goal was estimated for Southwestern Nebraska. The results show that the widespread use of gross water as a policy control variable substantially overstates the welfare cost of reducing consumptive use.
NUTRITION, HEALTH AND RURAL LABOR PRODUCTIVITY: PRELIMINARY WAGE EVIDENCE FROM BANGLADESH
Creators: name: Sur, Mona
name: Senauer, Benjamin
name: Sur, Mona
name: Senauer, Benjamin
Publisher: name: Unknown
Year: 1999
Subjects: Health Economics and Policy
Labor and Human Capital

description: This paper examines the relationship between nutrition and rural labor productivity using height and calorie intake as measures of nutrition and health status. The study is based on data from a survey of 956 households conducted in Bangladesh between 1996 and 1997. The paper focuses on adult male agricultural wage earners.
The subtraction contribution to the muonic-hydrogen Lamb shift: a point for lattice QCD calculations of the polarizability effect
Creators: name: Hagelstein, Franziska
name: Pascalutsa, Vladimir
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The proton-polarizability contribution to the muonic-hydrogen Lamb shift is a major source of theoretical uncertainty in the extraction of the proton charge radius. An empirical evaluation of this effect, based on the proton structure functions, requires a systematically improvable calculation of the "subtraction function", possibly using lattice QCD. We consider a different subtraction point, with the aim of accessing the subtraction function directly in lattice calculations. A useful feature of this subtraction point is that the corresponding contribution of the structure functions to the Lamb shift is suppressed. The whole effect is dominated by the subtraction contribution, calculable on the lattice.
description: 8 pages, 3 figures; published version
ANALYSIS OF HOUSEWIVES' GROCERY SHOPPING BEHAVIOR IN TAIWAN: AN APPLICATION OF THE POISSON SWITCHING REGRESSION
Creators: name: Kan, Kamhon
name: Fu, Tsu-Tan
name: Kan, Kamhon
name: Fu, Tsu-Tan
Publisher: name: Unknown
Year: 1997
Subjects: subject: Consumer/Household Economics
subject: Household production
subject: Labor supply rationing
subject: Poisson switching regression
subject: Shopping frequency
subject: Time allocation

description: The purpose of this study is to empirically investigate Taiwanese married women's grocery shopping behavior in relation to their labor force participation status. In this study, focus is limited to their grocery shopping frequency which is meant to be a proxy for an input to household production, i.e., food at home. A Poisson switching regression model is developed to estimate parameters of married women's shopping behavior. The results show that the labor force participation status does have a great impact on time allocation behavior.
Complex Horseshoes and the Dynamics of Mappings of Two Complex Variables
Creators: name: Oberste-Vorth, Ralph W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this study, a theory analogous to both the theories of polynomial-like mappings and Smale's real horseshoes is developed for the study of the dynamics of mappings of two complex variables. In partial analogy with polynomials in a single variable there are the Hénon mappings in two variables as well as higher dimensional analogues. From polynomial-like mappings, Hénon-like and quasi-Hénon-like mappings are defined following this analogy. A special form of the latter is the complex horseshoe. The major results about the real horseshoes of Smale remain true in the complex setting. In particular: (1) Trapping fields of cones(which are sectors in the real case) in the tangent spaces can be defined and used to find horseshoes. (2) The dynamics of a horseshoe is that of the two-sided shift on the symbol space on some number of symbols which depends on the type of the horseshoe. (3) Transverse intersections of the stable and unstable manifolds of a hyperbolic periodic point guarantee the existence of horseshoes.
description: 26 pages, PhD thesis with addendum
Triple Scissor Extender: A 6-DOF Lifting and Positioning Robot
Creators: name: Gonzalez, Daniel J.
name: Asada, H. Harry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We present a novel 6 DOF robotic mechanism for reaching high ceilings and positioning an end-effector. The end-effector is supported with three scissor mechanisms that extend towards the ceiling with 6 independent linear actuators moving the base ends of the individual scissors. The top point of each scissor is connected to one of three ball joints located at the three vertices of the top triangular plate holding the end-effector. Coordinated motion of the 6 linear actuators at the base allows the end-effector to reach an arbitrary position with an arbitrary orientation. The design concept of the Triple Scissor Extender is presented, followed by kinematic modeling and analysis of the the Inverse Jacobian relating actuator velocities to the end-effector velocities. The Inverse Jacobian eigenvalues are determined for diverse configurations in order to characterize the kinematic properties. A proof-of-concept prototype has been designed and built. The Inverse Jacobian for use in differential control is evaluated through experiments.
Recovering Unlawful Advantages in the Context of EU State Aid Tax Ruling Investigations
Creators: name: Cleynenbreugel, Pieter Van
Publisher: name: Market and Competition Law Review
Year: 2017

description: The European Commission has recently begun focus increasingly on the compatibility of Member States’ tax ruling procedures with EU State aid law. In that respect, it has ordered the recovery of unlawfully granted advantages through those procedures. This article examines to what extent the application of EU law principles of legitimate expectations and legal certainty are to take stock in State aid recovery proceedings of this particular legal certainty-enhancing and legitimate expectations creating tax ruling context. It additionally questions whether recovery in this particular context should be tailored to the specific national ruling framework having resulted in the advantage granted in violation of Article 107 TFEU.
description: Market and Competition Law Review, v. 1 n. 1 (2017)
Additional file 1 of Reprogrammed mesenchymal stem cells derived from iPSCs promote bone repair in steroid-associated osteonecrosis of the femoral head
Creators: name: Meiling Zhou
name: Jiaoya Xi
name: Yaofeng Cheng
name: Denglong Sun
name: Shu, Peng
name: Shuiqing Chi
name: Tian, Shuo
name: Ye, Shunan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Hematology

description: Additional file 1: Figure S1. Flow cytometric analysis for the cell surface markers of BMSCs at passage 3. Figure S2. Karyotype analysis. The karyotype of iPSC was normal (46, XY) after 37 passages. Figure S3. The immunogenicity and immunoregulatory function of MSCs. Flow cytometric analysis for immune-related surface molecules (CD80/CD86) of BMSCs (a) and iPSC-MSC (b). c Activity of iPSC-MSCs and BMSCs on the proliferation of stimulated T cells. Figure S4. Immunohistochemical staining of BrdU at the 4 weeks and 8 weeks after cell implantation. Scale bar indicated 50 μm. Figure S5. Gene expression of osteogenic gene Collagen type I and ALP after two weeks of osteogenic induction. For each gene, expression levels were normalized to the control group, n = 4 per group. All data are presented as mean ± SEM. One-way ANOVA with Tukey’s adjustment (*, p
Theoretical Isochrones with Extinction in the K Band. II. J - K versus K
Creators: name: Kim, Sungsoo S.
name: Figer, Donald F.
name: Lee, Myung Gyoon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate theoretical isochrones in a consistent way for five filter pairs near the J and K band atmospheric windows (J-K, J-K', J-Ks, F110W-F205W, and F110W-F222M) using the Padova stellar evolutionary models of Girardi et al. We present magnitude transformations between various K-band filters as a function of color. Isochrones with extinction of up to 6 mag in the K band are also presented. As found for the filter pairs composed of H & K band filters, we find that the reddened isochrones of different filter pairs behave as if they follow different extinction laws, and that the extinction curves of Hubble Space Telescope NICMOS filter pairs in the color-magnitude diagram are considerably nonlinear. Because of these problems, extinction values estimated with NICMOS filters can be in error by up to 1.3 mag. Our calculation suggests that the extinction law implied by the observations of Rieke et al for wavelengths between the J and K bands is better described by a power-law function with an exponent of 1.66 instead of 1.59, which is commonly used with an assumption that the transmission functions of J and K filters are Dirac delta functions.
description: Published in PASP, 118, 62 (Jan. 2006)
Additional file 1 of Exposure to PM2.5 is a risk factor for acute exacerbation of surgically diagnosed idiopathic pulmonary fibrosis: a case–control study
Creators: name: Tahara, Masahiro
name: Fujino, Yoshihisa
name: Yamasaki, Kei
name: Oda, Keishi
name: Kido, Takashi
name: Noriho Sakamoto
name: Kawanami, Toshinori
name: Kataoka, Kensuke
name: Egashira, Ryoko
name: Hashisako, Mikiko
name: Suzuki, Yuzo
name: Fujisawa, Tomoyuki
name: Mukae, Hiroshi
name: Suda, Takafumi
name: Yatera, Kazuhiro
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Supplementary Material.
Flow-plane decorrelations in heavy-ion collisions with multiple-plane cumulants
Creators: name: Xu, Zhiwan
name: Wu, Xiatong
name: Sword, Caleb
name: Wang, Gang
name: Voloshin, Sergei A.
name: Huang, Huan Zhong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The azimuthal correlations between local flow planes at different (pseudo)rapidities ($η$) may reveal important details of the initial nuclear matter density distributions in heavy-ion collisions. Extensive experimental measurements of a factorization ratio ($r_2$) and its derivative ($F_2$) have shown evidence of the longitudinal flow-plane decorrelation. However, nonflow effects also affect this observable and prevent a quantitative understanding of the phenomenon. In this paper, to distinguish decorrelation and nonflow effects, we propose a new cumulant observable, $T_2$, which largely suppresses nonflow. The technique sensitivity to different initial-state scenarios and nonflow effects are tested with a simple Monte Carlo model, and in the end, the method is applied to events simulated by a multiphase transport model (AMPT) for Au+Au collisions at $\sqrt{s_{\rm NN}} =200$ GeV. We also emphasize that a distinct decorrelation signal requires not only the right sign of an observable, but also its proper dependence on the $η$-window of the reference flow plane, to be consistent with the pertinent decorrelation picture.
description: 12 pages, 15 figures
Bright OB stars in the Galaxy.II. Wind variability in O supergiants as traced by H-alpha
Creators: name: Markova, N.
name: Puls, J.
name: Scuderi, S.
name: Markov, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the line-profile variability (lpv) of H-alpha for a large sample of O-type supergiants. We used the Temporal Variance Spectrum (TVS) analysis, developed by Fullerton et al 1996 and modified by us to take into account the effects of wind emission. By means of a comparative analysis we put a number of constraints on the properties of the variability as a function of stellar and wind parameters. The results of our analysis show that all the stars in the sample show evidence of significant lpv in H-alpha, mostly dominated by processes in the wind. The variations occur between zero and 0.3 v_inf (i.e., below ~1.5 R_star), in good agreement with the results from similar studies. A comparison between observations and line-profile simulations indicates that for stars with intermediate wind densities the H-alpha variability can be explained by simple models, consisting of coherent or broken shells (blobs) uniformly distributed over the wind volume, with an intrinsic scatter in the maximum density contrast of about a factor of two. For stars at lower and higher wind densities, on the other hand, we found certain inconsistencies between observations and our predictions, most importantly concerning the mean amplitude and the symmetry properties of the TVS. This disagreement might be explained with the presence of coherent large-scale structures, partly confined in a volume close to the star. Interpreted in terms of a variable mass-loss rate, the observed variations of H-alpha indicate changes of 4% with respect to the mean value of M_dot for stars with stronger winds and of 16% for stars with weaker winds. The effect of these variations on the corresponding wind momenta is rather insignificant (<0.16 dex), increasing the local scatter without affecting the Wind Momentum Luminosity Relationship.
description: 22 pages, 11 figures. Accepted by Astronomy and Astrophysics
Molecular Gas in NUclei of GAlaxies (NUGA): IV. Gravitational Torques and AGN Feeding
Creators: name: Garcia-Burillo, S.
name: Combes, F.
name: Schinnerer, E.
name: Boone, F.
name: Hunt, L. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the efficiency of stellar gravity torques as a mechanism to account for the feeding of the central engines of four low luminosity AGN: NGC4321, NGC4826, NGC4579 and NGC6951. These galaxies have been observed as part of the NUGA CO project, aimed at the study of AGN fueling mechanisms. Our calculations allow us to derive the characteristic time-scales for gas flows and discuss whether torques from the stellar potentials are efficient enough to drain the gas angular momentum in the inner 1 kpc of these galaxies. Results indicate paradoxically that feeding should be thwarted close to the AGN: in the four cases analyzed, gravity torques are mostly positive inside r~200pc, resulting in no inflow on these scales. As a possible solution for the paradox, we speculate that the agent responsible for driving inflow to still smaller radii is transient and thus presently absent in the stellar potential. Alternatively, the gravity torque barrier associated with the ILR of the bars in these galaxies could be overcome by other mechanisms that become competitive in due time against gravity torques. We find that viscosity can counteract moderate--to--low gravity torques on the gas if it acts on a nuclear ring of high gas surface density contrast and a few 100pc size. We propose an evolutionary scenario in which gravity torques and viscosity act in concert to produce recurrent episodes of activity during the typical lifetime of any galaxy. In this scenario the recurrence of activity in galaxies is indirectly related to that of the bar instabilities.
description: Accepted in Astronomy and Astrophysics, 24/06/05
AN EXPERIMENTAL ECONOMICS APPROACH TO ANALYZING PRICE DISCOVERY IN FORWARD AND SPOT MARKETS
Creators: name: Krogmeier, Joseph L.
name: Menkhaus, Dale J.
name: Phillips, Owen R.
name: Schmitz, John D.
name: Krogmeier, Joseph L.
name: Menkhaus, Dale J.
name: Phillips, Owen R.
name: Schmitz, John D.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Experimental economics
subject: Forward market
subject: Price discovery
subject: Spot market

description: Laboratory experiments are used to generate data that facilitate investigation of pricing behavior in forward and spot markets. Results suggest a tendency for prices in a spot market to converge to levels higher than those in a forward market. The difference in these market environments is the supply schedule. Buyers in a spot market are aware that supply is inelastic and become relatively aggressive bidders. Forward markets have a relatively elastic supply schedule and buyers fare better. This may motivate firms to promote forward markets and/or vertically integrate in the procurement of inputs.
Phase velocity and phase diffusion in periodically driven discrete state systems
Creators: name: Prager, T.
name: Schimansky-Geier, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a theory to calculate the effective phase diffusion coefficient and the mean phase velocity in periodically driven stochastic models with two discrete states. This theory is applied to a dichotomically driven Markovian two state system. Explicit expressions for the mean phase velocity, the effective phase diffusion coefficient and the Péclet number are analytically calculated. The latter shows as a measure of phase-coherence forced synchronization of the stochastic system with respect to the periodic driving. In a second step the theory is applied to a non Markovian two state model modeling excitable systems. The results prove again stochastic synchronization to the periodic driving and are in good agreement with simulations of a stochastic FitzHugh-Nagumo system.
description: 11 pages, 7 figures
The Dirichlet Hopf algebra of arithmetics
Creators: name: Fauser, Bertfried
name: Jarvis, P. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 16W30; 81T15; 11N99, 11M06

description: In this work, we develop systematically the ``Dirichlet Hopf algebra of arithmetics'' by dualizing addition and multiplication maps. We study the additive and multiplicative antipodal convolutions which fail to give rise to Hopf algebra structures, obeying only a weakened (multiplicative) homomorphism axiom. The consequences of the weakened structure, called a Hopf gebra, e.g. on cohomology are explored. This features multiplicativity versus complete multiplicativity of number theoretic arithmetic functions. The deficiency of not being a Hopf algebra is then cured by introducing an `unrenormalized' coproduct and an `unrenormalized' pairing. It is then argued that exactly the failure of the homomorphism property (complete multiplicativity) for non-coprime integers is a blueprint for the problems in quantum field theory (QFT) leading to the need for renormalization. Renormalization turns out to be the morphism from the algebraically sound Hopf algebra to the physical and number theoretically meaningful Hopf gebra. This can be modelled alternatively by employing Rota-Baxter operators. We stress the need for a characteristic-free development where possible, to have a sound starting point for generalizations of the algebraic structures. The last section provides three key applications: symmetric function theory, quantum (matrix) mechanics, and the combinatorics of renormalization in QFT which can be discerned as functorially inherited from the development at the number-theoretic level as outlined here. Hence the occurrence of number theoretic functions in QFT becomes natural.
description: 46 pages, 1 figure, needs PSTricks
Additional file 2 of Validity and diagnostic performance of fluorescence optical imaging measuring synovitis in hand osteoarthritis: baseline results from the Nor-Hand cohort
Creators: name: Maugesten, Øystein
name: Mathiessen, Alexander
name: Hammer, Hilde Berner
name: Hestetun, Sigrid Valen
name: Kvien, Tore Kristian
name: Uhlig, Till
name: Ohrndorf, Sarah
name: Haugen, Ida Kristin
Publisher: name: figshare
Year: 2020
Subjects: Space Science
Medicine
Cell Biology
Neuroscience

description: Additional file 2 : Table S1. The diagnostic performance of FOI measuring synovitis using MRI grade 2 & 3 as reference.
Rebates under EU Competition Law after the 2017 Intel Judgment: The Good, the Bad and the Ugly
Creators: name: Robertson, Viktoria H.S.E.
Publisher: name: Market and Competition Law Review
Year: 2018

description: On 6 September 2017, the Court of Justice of the European Union delivered its long-awaited Intel judgment. The European Commission had accused Intel of inducing customer loyalty and thus foreclosing the relevant market for its competitors through (i) a rebate scheme and (ii) direct payments, both of which the Commission qualified as abuses of dominance under Article 102 TFEU. The General Court upheld the Commission decision in its entirety in June 2014. Before the Grand Chamber of the Court of Justice, however, the General Court’s Intel judgment was set aside and the case was referred back to that Court. The Court of Justice held that where the Commission, as in its Intel decision of 2009, also relies on an as-efficient-competitor (AEC) test in order to assess the capability of a rebate scheme to restrict competition contrary to Article 102 TFEU, the General Court must review a party’s counterarguments pertaining to this economic analysis. The General Court was instructed to further examine the factual and economic evidence in this respect. With a view to illuminating the legal questions that posed themselves in Intel, the present contribution reviews the leading European case law on rebate schemes – Hoffmann-La Roche, Michelin I and II, British Airways, Tomra and Post Danmark II – as well as the Commission’s approach to conditional rebates in its 2009 Guidance Paper. After briefly recalling the different stages of the Intel case, the contribution then offers a commentary on and an analysis of the Court of Justice’s Intel judgment and the way in which the Court attempted to reconcile its formalistic case law on rebate schemes with the effects-based economic tests carried out by the Commission.
description: Market and Competition Law Review, v. 2 n. 1 (2018)
Unresolved Questions Regarding Lawyers’ Fees and the Restriction of Competition
Creators: name: Ferraro, Fabio
Publisher: name: Market and Competition Law Review
Year: 2018

description: This paper explores the most salient aspects of the case-law of the Court of Justice of the European Union on legal services in order to highlight a lack of clarity in defining the terms of compatibility between European Union law and national rules on lawyers’ fees. This is a complex issue and one that has not yet been finally resolved, especially in a difficult context such as that of the Italian market, which is characterised by an extremely large number of lawyers, which in itself entails the risk of deterioration in the quality of services provided, with services being offered at a discount. In Italy, following the Cipolla judgment of the ECJ and the resulting abolition of the system of fixed remuneration (minimum and maximum fees), new measures were introduced by the State and professional organisations to protect members of the legal profession (particularly to safeguard lawyers in a weaker position in dealings with powerful clients such as banks and insurance companies) and to ensure fair remuneration. In accordance with the Wouters exemption and the increasing role of economic analysis in competition rules, these measures require a reflective analytical approach in order to evaluate their compatibility with European Union law.
description: Market and Competition Law Review, v. 2 n. 1 (2018)
MULTIVARIATE PROCEDURES FOR IDENTIFYING RURAL LAND SUBMARKETS
Creators: name: Kennedy, Gary A.
name: Henning, Steven A.
name: Vandeveer, Lonnie R.
name: Dai, Ming
name: Kennedy, Gary A.
name: Henning, Steven A.
name: Vandeveer, Lonnie R.
name: Dai, Ming
Publisher: name: Unknown
Year: 1997
Subjects: subject: Land Economics/Use
subject: Cluster analysis
subject: Land market analysis
subject: Principal component analysis
subject: Rural land submarkets

description: Research has developed empirical models and procedures for analyzing factors which influence rural land markets; however, there have been limited efforts in developing procedures for identifying rural land submarkets. Principal component analysis is used here to detect the presence of multiple rural land submarkets. Cluster analysis is then used as a basis for identifying eight contiguous rural land submarkets in Louisiana. As opposed to single-attribute procedures that have been based largely on subjective judgment, multivariate procedures illustrated in this analysis provide a means for capturing the combined effects of physical and socioeconomic influences in delineating rural land submarkets.
Strong coupling constant from moments of quarkonium correlators revisited
Creators: name: Petreczky, Peter
name: Weber, Johannes Heinrich
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: 81V05

description: We revisit previous determination of the strong coupling constant from moments of quarkonium correlators in (2+1)-flavor QCD. We use previously calculated moments obtained with Highly Improved Staggered Quark (HISQ) action for five different quark masses and several lattice spacings. We perform a careful continuum extrapolations of the moments and from the comparison of these to the perturbative result we determine the QCD Lambda parameter, $Λ_{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$ MeV. This corresponds to $α_s^{n_f=5}(μ=M_Z)=0.1177(12)$.
description: 24 pages, 6 figures; data of Figs. 2-4 among the source files; primary data (figs. 1 and 6) available through arXiv:1901.06424)
Design and Analysis of 6-DOF Triple Scissor Extender Robots with Applications in Aircraft Assembly
Creators: name: Gonzalez, Daniel J.
name: Asada, H. Harry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: A new type of parallel robot mechanism with an extendable structure is presented, and its kinematic properties and design parameters are analyzed. The Triple Scissor Extender (TSE) is a 6 Degree-Of-Freedom robotic mechanism for reaching high ceilings and positioning an end effector. Three scissor mechanisms are arranged in parallel, with the bottom ends coupled to linear slides, and the top vertex attached to an end effector plate. Arbitrary positions and orientations of the end effector can be achieved through the coordinated motion of the six linear actuators located at the base. By changing key geometric parameters, the TSE's design can yield a specific desired workspace volume and differential motion behavior. A general kinematic model for diverse TSEs is derived, and the kinematic properties, including workspace, singularity, and the Jacobian singular values, are evaluated. From these expressions, four key design parameters are identified, and their sensitivity upon the workspace volume and the Jacobian singular values is analyzed. A case study in autonomous aircraft assembly is presented using the insights gained from the design parameter studies.
The Fate of Shear-Oscillated Amorphous Solids
Creators: name: Liu, Chen
name: Ferrero, Ezequiel E.
name: Jagla, Eduardo A.
name: Martens, Kirsten
name: Rosso, Alberto
name: Talon, Laurent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The behavior of shear-oscillated amorphous materials is studied using a coarse-grained model. Samples are prepared at different degrees of annealing and then subject to athermal and quasistatic oscillatory deformations at various fixed amplitudes. The steady-state reached after several oscillations is fully determined by the initial preparation and the oscillation amplitude, as seen from stroboscopic stress and energy measurements. Under small oscillations, poorly annealed materials display shear-annealing, while ultra-stabilized materials are insensitive to them. Yet, beyond a critical oscillation amplitude, both kind of materials display a discontinuous transition to the same mixed state composed by a fluid shear-band embedded in a marginal solid. Quantitative relations between uniform shear and the steady-state reached with this protocol are established. The transient regime characterizing the growth and the motion of the shear band is also studied.
description: 10 pages, 11 figures. Accepted for publication in The Journal of Chemical Physics
Extracellular Matrix regulates the morphodynamics of 3D migrating cancer cells
Creators: name: Eddy, Christopher Z.
name: Raposo, Helena
name: Wong, Ryan
name: Sun, Bo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Cell shape is linked to cell function. The significance of cell morphodynamics, namely the temporal fluctuation of cell shape, is much less understood. Here we study the morphodynamics of MDA-MB-231 cells in type I collagen extracellular matrix (ECM). We systematically vary ECM physical properties by tuning collagen concentrations, alignment, and gelation temperatures. We find that morphodynamics of 3D migrating cells are externally controlled by ECM mechanics and internally modulated by Rho-signaling. We employ machine learning to classify cell shape into four different morphological phenotypes, each corresponding to a distinct migration mode. As a result, we map cell morphodynamics at mesoscale into the temporal evolution of morphological phenotypes. We characterize the mesoscale dynamics including occurrence probability, dwell time and transition matrix at varying ECM conditions, which demonstrate the complex phenotype landscape and optimal pathways for phenotype transitions. In light of the mesoscale dynamics, we show that 3D cancer cell motility is a hidden Markov process whereby the step size distributions of cell migration are coupled with simultaneous cell morphodynamics. We also show that morphological phenotype transitions facilitate cancer cells to navigate non-uniform ECM such as traversing the interface between matrices of two distinct microstructures. In conclusion, we demonstrate that 3D migrating cancer cells exhibit rich morphodynamics that is regulated by ECM mechanics, Rho-signaling, and is closely related with cell motility. Our results pave the way to the functional understanding and mechanical programming of cell morphodynamics for normal and malignant cells.
AdS/CFT Casimir Energy for Rotating Black Holes
Creators: name: Gibbons, G. W.
name: Perry, M. J.
name: Pope, C. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that if one chooses the Einstein Static Universe as the metric on the conformal boundary of Kerr-AdS spacetime, then the Casimir energy of the boundary conformal field theory can easily be determined. The result is independent of the rotation parameters, and the total boundary energy then straightforwardly obeys the first law of thermodynamics. Other choices for the metric on the conformal boundary will give different, more complicated, results. As an application, we calculate the Casimir energy for free self-dual tensor multiplets in six dimensions, and compare it with that of the seven-dimensional supergravity dual. They differ by a factor of 5/4.
description: 4 pages, Latex
Molecular recognition in a lattice model: An enumeration study
Creators: name: Bogner, Thorsten
name: Degenhard, Andreas
name: Schmid, Friederike
Publisher: name: arXiv
Year: 2005
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We investigate the mechanisms underlying selective molecular recognition of single heteropolymers at chemically structured planar surfaces. To this end, we study systems with two-letter (HP) lattice heteropolymers by exact enumeration techniques. Selectivity for a particular surface is defined by an adsorption energy criterium. We analyze the distributions of selective sequences and the role of mutations. A particularly important factor for molecular recognition is the small-scale structure on the polymers.
description: revised version with additional plots
ECONOMIC EFFECTS OF A BAN AGAINST ANTIMICROBIAL DRUGS USED IN U.S. BEEF PRODUCTION
Creators: name: Mathews, Kenneth H.
name: Mathews, Kenneth H.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Livestock Production/Industries
subject: antimicrobial drug
subject: ban
subject: beef production
subject: cost minimization
subject: feed efficiency
subject: growth function
subject: growth promotant

description: Economic effects for three scenarios of antimicrobial drug use in livestock production -- a no-ban scenario and two levels of bans -- are examined through cost minimization and a partial equilibrium analysis. Results indicate that regulating antimicrobial drug use in livestock production would increase per-unit costs of producers previously using drugs and reduce beef supplies in the short run, reducing consumer surplus. Producers not previously using drugs would benefit from short-run price increases.
Design of Extra Robotic Legs for Augmenting Human Payload Capabilities by Exploiting Singularity and Torque Redistribution
Creators: name: Gonzalez, Daniel J.
name: Asada, H. Harry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We present the design of a new robotic human augmentation system that will assist the operator in carrying a heavy payload, reaching and maintaining difficult postures, and ultimately better performing their job. The Extra Robotic Legs (XRL) system is worn by the operator and consists of two articulated robotic legs that move with the operator to bear a heavy payload. The design was driven by a need to increase the effectiveness of hazardous material emergency response personnel who are encumbered by their personal protective equipment (PPE). The legs will ultimately walk, climb stairs, crouch down, and crawl with the operator while eliminating all external PPE loads on the operator. The forces involved in the most extreme loading cases were analyzed to find an effective strategy for reducing actuator loads. The analysis reveals that the maximum torque is exerted during the transition from the crawling to standing mode of motion. Peak torques are significantly reduced by leveraging redundancy in force application resulting from a closed-loop kinematic chain formed by a particular posture of the XRL. The actuators, power systems, and transmission elements were designed from the results of these analyses. Using differential mechanisms to combine the inputs of multiple actuators into a single degree of freedom, the gear reductions needed to bear the heavy loads could be kept at a minimum, enabling high bandwidth force control due to the near-direct-drive transmission. A prototype was fabricated utilizing the insights gained from these analyses and initial tests indicate the feasibility of the XRL system.
Nonanalytic enhancement of the charge transfer from adatom to one-dimensional semiconductor superlattice and optical absorption spectrum
Creators: name: Tanaka, Satoshi
name: Garmon, Sterling
name: Petrosky, Tomio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The charge transfer from an adatom to a semiconductor substrate of one-dimensional quantum dot array is evaluated theoretically. Due to the Van Hove singularity in the density of electron states at the band edges, the charge transfer decay rate is enhanced nonanalytically in terms of the coupling constant $g$ as $g^{4/3}$. The optical absorption spectrum for the ionization of a core level electron of the adatom to the conduction band is also calculated. The reversible non-Markovian process and irreversible Markovian process in the time evolution of the adatom localized state manifest themselves in the absorption spectrum through the branch point and pole contributions, respectively.
description: 16 pages, 6 figures