cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Status of non-standard neutrino interactions
Creators: name: Ohlsson, Tommy
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The phenomenon of neutrino oscillations has been established as the leading mechanism behind neutrino flavor transitions, providing solid experimental evidence that neutrinos are massive and lepton flavors are mixed. Here we review sub-leading effects in neutrino flavor transitions known as non-standard neutrino interactions, which is currently the most explored description for effects beyond the standard paradigm of neutrino oscillations. In particular, we report on the phenomenology of non-standard neutrino interactions and their experimental and phenomenological bounds as well as future sensitivity and discovery reach.
description: 51 pages, 11 figures. Final version published in Rep. Prog. Phys
The X-ray flaring properties of Sgr A* during six years of monitoring with Swift
Creators: name: Degenaar, N.
name: Miller, J. M.
name: Kennea, J.
name: Reynolds, N. Gehrels M. T.
name: Wijnands, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Starting in 2006, Swift has been targeting a region of ~21'X21' around Sagittarius A* (Sgr A*) with the onboard X-ray telescope. The short, quasi-daily observations offer an unique view of the long-term X-ray behavior of the supermassive black hole. We report on the data obtained between 2006 February and 2011 October, which encompasses 715 observations with a total accumulated exposure time of ~0.8 Ms. A total of six X-ray flares were detected with Swift, which all had an average 2-10 keV luminosity of Lx (1-4)E35 erg/s (assuming a distance of 8 kpc). This more than doubles the number of such bright X-ray flares observed from Sgr A*. One of the Swift-detected flares may have been softer than the other five, which would indicate that flares of similar intensity can have different spectral properties. The Swift campaign allows us to constrain the occurrence rate of bright (Lx > 1E35 erg/s) X-ray flares to be ~0.1-0.2 per day, which is in line with previous estimates. This analysis of the occurrence rate and properties of the X-ray flares seen with Swift offers an important calibration point to asses whether the flaring behavior of Sgr A* changes as a result of its interaction with the gas cloud that is projected to make a close passage in 2013.
description: 8 pages, 5 figures, 3 tables. Shortened, accepted to ApJ
Sample Size Planning for Classification Models
Creators: name: Beleites, Claudia
name: Neugebauer, Ute
name: Bocklitz, Thomas
name: Krafft, Christoph
name: Popp, Jürgen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: G.3
subject: 92E99, 97K80, 62K99

description: In biospectroscopy, suitably annotated and statistically independent samples (e. g. patients, batches, etc.) for classifier training and testing are scarce and costly. Learning curves show the model performance as function of the training sample size and can help to determine the sample size needed to train good classifiers. However, building a good model is actually not enough: the performance must also be proven. We discuss learning curves for typical small sample size situations with 5 - 25 independent samples per class. Although the classification models achieve acceptable performance, the learning curve can be completely masked by the random testing uncertainty due to the equally limited test sample size. In consequence, we determine test sample sizes necessary to achieve reasonable precision in the validation and find that 75 - 100 samples will usually be needed to test a good but not perfect classifier. Such a data set will then allow refined sample size planning on the basis of the achieved performance. We also demonstrate how to calculate necessary sample sizes in order to show the superiority of one classifier over another: this often requires hundreds of statistically independent test samples or is even theoretically impossible. We demonstrate our findings with a data set of ca. 2550 Raman spectra of single cells (five classes: erythrocytes, leukocytes and three tumour cell lines BT-20, MCF-7 and OCI-AML3) as well as by an extensive simulation that allows precise determination of the actual performance of the models in question.
description: The paper is published in Analytica Chimica Acta (special issue "CAC2012"). This is a reformatted version of the accepted manuscript with few typos corrected and links to the official publicaion, including the supplementary material (pages 11 - 16 and supplementary-* files in the source). The slides of the presentation at Clircon (2015-04-22, Exeter, UK) are available as ancillary pdf file
The algebraic Bethe ansatz for scalar products in SU(3)-invariant integrable models
Creators: name: Belliard, S.
name: Pakuliak, S.
name: Ragoucy, E.
name: Slavnov, N. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study SU(3)-invariant integrable models solvable by nested algebraic Bethe ansatz. We obtain a determinant representation for particular case of scalar products of Bethe vectors. This representation can be used for the calculation of form factors and correlation functions of XXX SU(3)-invariant Heisenberg chain.
description: 25 pages, typos corrected
Bemerkungen zu einer Fibel der frühen Latènezeit von der Heuneburg bei Herbertingen-Hundersingen, Kr. Sigmaringen
Creators: name: Gersbach, Egon
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
... aram et columnam pro se et suis ... Der Möglinger Viergötterstein und Verwandtes - Römische Votivkunst und bürgerliches Selbstverständnis?
Creators: name: Ronke, Jutta
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Die Häuser zum Helm/Kollöffel und zum Weißen Widder (Wessenbergstraße 12) in Konstanz
Creators: name: Derschka, Harald Rainer
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Global resolution of singularities in $1$-dimensional foliated spaces
Creators: name: Belotto, André
Publisher: name: arXiv
Year: 2012
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $M$ be an analytic manifold over $\mathbb{R}$ or $\mathbb{C}$, $θ$ a $1$-dimensional Log-Canonical (resp. monomial) singular distribution and $\mathcal{I}$ a coherent ideal sheaf defined on $M$. We prove the existence of a resolution of singularities for $\mathcal{I}$ that preserves the Log-Canonicity (resp. monomiality) of the singularities of $θ$. Furthermore, we apply this result to provide a resolution of a family of ideal sheaves when the dimension of the parameter space is equal to the dimension of the ambient space minus one.
description: There is a change of title and structure to the previous version of the manuscript, although the results are the same. We intend to make the manuscript more direct
Divide and conquer the Hilbert space of translation-symmetric spin systems
Creators: name: Weiße, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Iterative methods that operate with the full Hamiltonian matrix in the untrimmed Hilbert space of a finite system continue to be important tools for the study of one- and two-dimensional quantum spin models, in particular in the presence of frustration. To reach sensible system sizes such numerical calculations heavily depend on the use of symmetries. We describe a divide-and-conquer strategy for implementing translation symmetries of finite spin clusters, which efficiently uses and extends the "sublattice coding" of H. Q. Lin. With our method, the Hamiltonian matrix can be generated on-the-fly in each matrix vector multiplication, and problem dimensions beyond 10^11 become accessible.
description: 9 pages
Biljana Schmid-Sikimić, Der Arm- und Beinschmuck der Hallstattzeit in der Schweiz mit einem Anhang der Gürtelhaken und Gürtelgehänge der Hallstattzeit im Schweizerischen Mittelland, Jura und Wallis
Creators: name: Menzel, Peter
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Rezension zu: Biljana Schmid-Sikimic, Der Arm- und Beinschmuck der Hallstattzeit in der Schweiz mit einem Anhang der Gürtelhaken und Gürtelgehänge der Hallstattzeit im Schweizerischen Mittelland, Jura und Wallis. Mit einem Beitrag von Walter Fasnacht. PBF X,5 (Stuttgart 1996). 219 Seiten, 103 Tafeln. ISBN 35-1506-344-7.
description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Quantum Origins of Molecular Recognition and Olfaction in Drosophila
Creators: name: Bittner, Eric R.
name: Madalan, Adrian
name: Czader, Arkadiuz
name: Roman, Gregg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The standard model for molecular recognition of an odorant is that receptor sites discriminate by molecular geometry as evidenced that two chiral molecules may smell very differently. However, recent studies of isotopically labeled olfactants indicate that there may be a molecular vibration-sensing component to olfactory reception, specifically in the spectral region around 2300 cm$^{-1}$. Here we present a donor-bridge-acceptor model for olfaction which attempts to explain this effect. Our model, based upon accurate quantum chemical calculations of the olfactant (bridge) in its neutral and ionized states, posits that internal modes of the olfactant are excited impulsively during hole transfer from a donor to acceptor site on the receptor, specifically those modes that are resonant with the tunneling gap. By projecting the impulsive force onto the internal modes, we can determine which modes are excited at a given value of the donor-acceptor tunneling gap. Only those modes resonant with the tunneling gap and are impulsively excited will give a significant contribution to the inelastic transfer rate. Using acetophenone as a test case, our model and experiments on D. melanogaster suggest that isotopomers of a given olfactant give rise to different odorant qualities. These results support the notion that inelastic scattering effects play a role in discriminating between isotopomers, but that this is not a general spectroscopic effect
description: 7 pages, 3 figures
Eveline Grönke, Edgar Weinlich, Mode aus Modeln. Kruseler- und andere Tonfiguren des 14.-16. Jahrhunderts aus dem Germanischen Nationalmuseum und anderen Sammlungen
Creators: name: Fingerlin, Ilse
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2019

description: Rezension zu: Eveline Grönke, Edgar Weinlich, Mode aus Modeln. Kruseler- und andere Tonfiguren des 14.-16. Jahrhunderts aus dem Germanischen Nationalmuseum und anderen Sammlungen. Wissenschaftliche Beibände zum Anzeiger des Germanischen Nationalmuseums Bd. 14, Nürnberg 1998. Verlag des Germanischen Nationalmuseums (ISBN 3-926982-58-6). 188 Seiten, 25 sw-Abb., 34 sw-Tafeln mit 356 Abb.,2 Farbtaf. mit 22 Abb.
description: Fundberichte aus Baden-Württemberg, Bd. 23 (1999): Fundberichte aus Baden-Württemberg
Theory of Quantum Phase Transition in Iron-based Superconductors with Half-Dirac Nodal Electron Fermi Surface
Creators: name: Makhfudz, Imam
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quantum phase transition in iron-based superconductors with 'half-Dirac' node at the electron Fermi surface as a $T=0$ structural phase transition described in terms of nematic order is discussed. An effective low energy theory that describes half-Dirac nodal Fermions and their coupling to Ising nematic order that describes the phase transition is derived and analyzed using renormalization group (RG) study of the large-$N_f$ version of the theory. The inherent absence of Lorentz invariance of the theory leads to RG flow structure where the velocities $v_F$ and $v_Δ$ at the paired half-Dirac nodes ($1\overline{1}$ and $2\overline{2}$) in general flow differently under RG, implying that the nodal electron gap is deformed and the $C_4$ symmetry is broken, explaining the structural (orthogonal to orthorhombic) phase transition at the quantum critical point (QCP). The theory is found to have Gaussian fixed point $λ^*=0, (v_Δ/v_F)^*=0$ with stable flow lines toward it, suggesting a second order nematic phase transition. Interpreting the fermion-Ising nematic boson interaction as a decay process of nematic Ising order parameter scalar field fluctuations into half-Dirac nodal fermions, I find that the theory surprisingly behaves as systems with dynamical critical exponent $z = 1$, reflecting undamped quantum critical dynamics and emergent fully relativistic field theory arising from the non(fully)-relativistic field theory and is direct consequence of $(v_Δ/v_F)^*=0$ fixed point. The nematic critical fluctuations lead to remarkable change to the spectral function peak where at a critical point $λ_c$, directly related to nematic QCP, the central spectral peak collapses and splits into satellite spectral peaks around nodal point. The vanishing of the zero modes density of states leads to the undamped $z=1$ quantum critical dynamics.
description: Already accepted for publication in Annals of Physics
Effects of preparation and measurement misalignments on the security of the BB84 quantum key distribution protocol
Creators: name: Woodhead, Erik
name: Pironio, Stefano
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ideal Bennett-Brassard 1984 (BB84) quantum key distribution protocol is based on the preparation and measurement of qubits in two alternative bases differing by an angle of pi/2. Any real implementation of the protocol, though, will inevitably introduce misalignments in the preparation of the states and in the alignment of the measurement bases with respect to this ideal situation. Various security proofs take into account (at least partially) such errors, i.e., show how Alice and Bob can still distil a secure key in the presence of these imperfections. Here, we consider the complementary problem: how can Eve exploit misalignments to obtain more information about the key than would be possible in an ideal implementation? Specifically, we investigate the effects of misalignment errors on the security of the BB84 protocol in the case of individual attacks, where necessary and sufficient conditions for security are known. Though the effects of these errors are small for expected deviations from the perfect situation, our results nevertheless show that Alice and Bob can incorrectly conclude that they have established a secure key if the inevitable experimental errors in the state preparation and in the alignment of the measurements are not taken into account. This gives further weight to the idea that the formulation and security analysis of any quantum cryptography protocol should be based on realistic assumptions about the properties of the apparatus used. Additionally, we note that BB84 seems more robust against alignment imperfections if both the x and z bases are used to generate the key.
Tuning spreading and avalanche-size exponents in directed percolation with modified activation probabilities
Creators: name: Landes, François
name: Jagla, E. A.
name: Rosso, Alberto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the directed percolation process as a prototype of systems displaying a nonequilibrium phase transition into an absorbing state. The model is in a critical state when the activation probability is adjusted at some precise value p_c. Criticality is lost as soon as the probability to activate sites at the first attempt, p1, is changed. We show here that criticality can be restored by "compensating" the change in p1 by an appropriate change of the second time activation probability p2 in the opposite direction. At compensation, we observe that the bulk exponents of the process coincide with those of the normal directed percolation process. However, the spreading exponents are changed, and take values that depend continuously on the pair (p1, p2). We interpret this situation by acknowledging that the model with modified initial probabilities has an infinite number of absorbing states.
description: 9 pages, 11 figures
Equivalent D=3 Supergravity Amplitudes from Double Copies of Three-Algebra and Two-Algebra Gauge Theories
Creators: name: Huang, Yu-tin
name: Johansson, Henrik
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that three-dimensional supergravity amplitudes can be obtained as double copies of either three-algebra super-Chern-Simons matter theory or that of two-algebra super-Yang-Mills theory, when either theory is organized to display the color-kinematics duality. We prove that only helicity-conserving four-dimensional gravity amplitudes have nonvanishing descendants when reduced to three dimensions; implying the vanishing of odd-multiplicity S-matrix elements, in agreement with Chern-Simons matter theory. We explicitly verify the double-copy correspondence at four and six points for N=12,10,8 supergravity theories and discuss its validity for all multiplicity.
description: 5 pages, published version in PRL
Search for resonant t t-bar production in lepton+jets events in pp collisions at sqrt(s) = 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected from data samples corresponding to an integrated luminosity of 4.4-5.0 inverse femtobarns collected in pp collisions at sqrt(s) = 7 TeV. Results are presented from the combination of two dedicated searches optimized for boosted production and production at threshold. No excess of events is observed over the expected yield from the standard model processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95% confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3 (1.3) pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum model are also excluded, and an upper limit of 0.7 pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV.
description: Replaced with published version. Added journal reference and DOI
Holographic Geometries of one-dimensional gapped quantum systems from Tensor Network States
Creators: name: Molina-Vilaplana, Javier
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a recent conjecture connecting the AdS/CFT correspondence and entanglement renormalization tensor network states (MERA). The proposal interprets the tensor connectivity of the MERA states associated to quantum many body systems at criticality, in terms of a dual holographic geometry which accounts for the qualitative aspects of the entanglement and the correlations in these systems. In this work, some generic features of the entanglement entropy and the two point functions in the ground state of one dimensional gapped systems are considered through a tensor network state. The tensor network is builded up as an hybrid composed by a finite number of MERA layers and a matrix product state (MPS) acting as a cap layer. Using the holographic formula for the entanglement entropy, here it is shown that an asymptotically AdS metric can be associated to the hybrid MERA-MPS state. The metric is defined by a function that manages the growth of the minimal surfaces near the capped region of the geometry. Namely, it is shown how the behaviour of the entanglement entropy and the two point correlators in the tensor network, remains consistent with a geometric computation which only depends on this function. From these observations, an explicit connection between the entanglement structure of the tensor network and the function which defines the geometry is provided.
description: 25 pages, 6 Postscript figures. The v2 is a major revisioned version with a new title and results to be published in JHEP
Der römerzeitliche Gutshof von Otrang bei Fliessem : Abschluß der Konservierungsarbeiten
Creators: name: Cüppers, Heinz
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1969: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
Ein Renaissance-Kopf aus Enkirch
Creators: name: Zahn, Eberhard
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1973: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
Der Pelikan als Opfertier im römischen Trier
Creators: name: Schindler, Reinhard
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1974: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
A new two-component integrable system with peakon solutions
Creators: name: Xia, Baoqiang
name: Qiao, Zhijun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A new two-component system with cubic nonlinearity and linear dispersion: \begin{eqnarray*} \left\{\begin{array}{l} m_t=bu_{x}+\frac{1}{2}[m(uv-u_xv_x)]_x-\frac{1}{2}m(uv_x-u_xv), \\ n_t=bv_{x}+\frac{1}{2}[ n(uv-u_xv_x)]_x+\frac{1}{2} n(uv_x-u_xv), \\m=u-u_{xx},~~ n=v-v_{xx}, \end{array}\right. \end{eqnarray*} where $b$ is an arbitrary real constant, is proposed in this paper. This system is shown integrable with its Lax pair, bi-Hamiltonian structure, and infinitely many conservation laws. Geometrically, this system describes a nontrivial one-parameter family of pseudo-spherical surfaces. In the case $b=0$, the peaked soliton (peakon) and multi-peakon solutions to this two-component system are derived. In particular, the two-peakon dynamical system is explicitly solved and their interactions are investigated in details. Moreover, a new integrable cubic nonlinear equation with linear dispersion \begin{eqnarray*} m_t=bu_{x}+\frac{1}{2}[m(|u|^2-|u_x|^2)]_x-\frac{1}{2}m(uu^\ast_x-u_xu^\ast), \quad m=u-u_{xx}, \end{eqnarray*} is obtained by imposing the complex conjugate reduction $v=u^\ast$ to the two-component system. The complex valued $N$-peakon solution and kink wave solution to this complex equation are also derived.
Der Pelikan auf zwei spätgotischen Tonmodeln im Landesmuseum [Trier]
Creators: name: Zahn, Eberhard
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1974: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
On Wave Particle Duality
Creators: name: Blackman, Jerome
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent paper a mathematical model for quantum measurement was presented. The phenomenon of wave particle duality, which is introduced in every beginning course of quantum theory, can be explained using this model. Although it is a special case of the general theory it has historic interest and involves the use of a continuous spectrum which was treated only casually in the original article. The treatment here is self contained except for the proof of a mathematical theorem appearing in the first paper.
description: 6 pages. Considerable simplification of earlier article
Grabsteine Trierer Rabbiner
Creators: name: Binsfeld, Wolfgang
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1974: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
Stochastic perturbations in open chaotic systems: random versus noisy maps
Creators: name: Bodai, Tamas
name: Altmann, Eduardo G.
name: Endler, Antonio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We investigate the effects of random perturbations on fully chaotic open systems. Perturbations can be applied to each trajectory independently (white noise) or simultaneously to all trajectories (random map). We compare these two scenarios by generalizing the theory of open chaotic systems and introducing a time-dependent conditionally-map-invariant measure. For the same perturbation strength we show that the escape rate of the random map is always larger than that of the noisy map. In random maps we show that the escape rate $κ$ and dimensions $D$ of the relevant fractal sets often depend nonmonotonically on the intensity of the random perturbation. We discuss the accuracy (bias) and precision (variance) of finite-size estimators of $κ$ and $D$, and show that the improvement of the precision of the estimations with the number of trajectories $N$ is extremely slow ($\propto 1/\ln N$). We also argue that the finite-size $D$ estimators are typically biased. General theoretical results are combined with analytical calculations and numerical simulations in area-preserving baker maps.
description: 12 pages, 3 figures, 1 table, manuscript submitted to Physical Review E
Does the Multiple-scattering Series in the Pion-deuteron Scattering Actually Converge?
Creators: name: Kudryavtsev, Alexander E.
name: Romanov, Alexander I.
name: Gani, Vakhid A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is demonstrated that the well-known answer for the multiple-scattering series (MSS) for a light particle interacting to a pair of static nucleons, calculated in the Fixed Centers Approximation (FCA), works well for a wide region of the two-body complex scattering length $a$. However, this approach is not applicable in a narrow region surrounding the real positive $a$ half-axis, where the MSS does not converge. Simultaneously, for real positive $a$'s the 3-body system forms an infinite set of bound states.
description: 9 pages
Uniaxial stress effects on the structural and electronic properties of BaFe2As2 and CaFe2As2
Creators: name: Tomic, Milan
name: Jeschke, Harald O.
name: Fernandes, Rafael M.
name: Valenti, Roser
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Starting from the orthorhombic magnetically ordered phase, we investigate the effects of uniaxial tensile and compressive stresses along a, b, and the diagonal a+b directions in BaFe2As2 and CaFe2As2 in the framework of ab initio density functional theory (DFT) and a phenomonological Ginzburg-Landau model. While -contrary to the application of hydrostatic or c-axis uniaxial pressure- both systems remain in the orthorhombic phase with a pressure-dependent nonzero magnetic moment, we observe a sign-changing jump in the orthorhombicity at a critical uniaxial pressure, accompanied by a reversal of the orbital occupancy and a switch between the ferromagnetic and antiferromagnetic directions. Our Ginzburg-Landau analysis reveals that this behavior is a direct consequence of the competition between the intrinsic magneto-elastic coupling of the system and the applied compressive stress, which helps the system to overcome the energy barrier between the two possible magneto-elastic ground states. Our results shed light on the mechanisms involved in the detwinning process of an orthorhombic iron-pnictide crystal and on the changes in the magnetic properties of a system under uniaxial stress.
description: 10 pages, 7 figures
Ein römisches Kindergrab [aus Föhren]
Creators: name: Binsfeld, Wolfgang
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, 1974: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
Stein's method and the rank distribution of random matrices over finite fields
Creators: name: Fulman, Jason
name: Goldstein, Larry
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: With ${\mathcal{Q}}_{q,n}$ the distribution of $n$ minus the rank of a matrix chosen uniformly from the collection of all $n\times(n+m)$ matrices over the finite field $\mathbb{F}_q$ of size $q\ge2$, and ${\mathcal{Q}}_q$ the distributional limit of ${\mathcal{Q}}_{q,n}$ as $n\rightarrow\infty$, we apply Stein's method to prove the total variation bound $\frac{1}{8q^{n+m+1}}\leq\|{\mathcal{Q}}_{q,n}-{\mathcal{Q}}_q\|_{\mathrm{TV}}\leq\frac{3}{q^{n+m+1}}$. In addition, we obtain similar sharp results for the rank distributions of symmetric, symmetric with zero diagonal, skew symmetric, skew centrosymmetric and Hermitian matrices.
description: Published at http://dx.doi.org/10.1214/13-AOP889 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Braiding of non-Abelian anyons using pairwise interactions
Creators: name: Burrello, M.
name: van Heck, B.
name: Akhmerov, A. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The common approach to topological quantum computation is to implement quantum gates by adiabatically moving non-Abelian anyons around each other. Here we present an alternative perspective based on the possibility of realizing the exchange (braiding) operators of anyons by adiabatically varying pairwise interactions between them rather than their positions. We analyze a system composed by four anyons whose couplings define a T-junction and we show that the braiding operator of two of them can be obtained through a particular adiabatic cycle in the space of the coupling parameters. We also discuss how to couple this scheme with anyonic chains in order to recover the topological protection.
description: 8 pages, 7 figures. Errors corrected, clarifications and comments added
Hans Lehners Trierer Jahre
Creators: name: Merten, Jürgen
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 20 (1988): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Extracting Planet Mass and Eccentricity From TTV data
Creators: name: Lithwick, Yoram
name: Xie, Jiwei
name: Wu, Yanqin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Most planet pairs in the Kepler data that have measured transit time variations (TTV) are near first-order mean-motion resonances. We derive analytical formulae for their TTV signals. We separate planet eccentricity into free and forced parts, where the forced part is purely due to the planets' proximity to resonance. This separation yields simple analytical formulae. The phase of the TTV depends sensitively on the presence of free eccentricity: if the free eccentricity vanishes, the TTV will be in phase with the longitude of conjunctions. This effect is easily detectable in current TTV data. The amplitude of the TTV depends on planet mass and free eccentricity, and it determines planet mass uniquely only when the free eccentricity is sufficiently small. We proceed to analyze the TTV signals of six short period Kepler pairs. We find that three of these pairs (Kepler-18,24,25) have TTV phase consistent with zero. The other three (Kepler-23,28,32) have small TTV phases, but ones that are distinctly non-zero. We deduce that the free eccentricities of the planets are small, < 0.01, but not always vanishing. Furthermore, as a consequence of this, we deduce that the true masses of the planets are fairly accurately determined by the TTV amplitudes, within a factor < 2. The smallness of the free eccentricities suggests that the planets have experienced substantial dissipation. This is consistent with the hypothesis that the observed pile-up of Kepler pairs near mean-motion resonances is caused by resonant repulsion. But the fact that some of the planets have non-vanishing free eccentricity suggests that after resonant repulsion occurred there was a subsequent phase in the planets' evolution when their eccentricities were modestly excited, perhaps by interplanetary interactions.
description: final ApJ version (improved discussion)
Praepositus vinorum : ein kaiserlicher Weinverwalter im spätrömischen Trier
Creators: name: Schwinden, Lothar
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 28 (1996): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
"Die Geschlechter verschwinden mit ihrem Thun ..." : Zu den archäologischen Forschungen des Pfarrers Philipp Schmitt (1805-1856)
Creators: name: Merten, Jürgen
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 30 (1998): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Boolean ideals and their varieties
Creators: name: Lundqvist, Samuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13P10, 68W30, 05E40

description: We consider ideals in the ring $\mathbb{Z}_2[x_1,\ldots, x_n]$ that contain the polynomials $x_i^2 - x_i$ for $i = 1, \ldots, n$ and give various results related to the one-to-one correspondence between these ideals and the subsets of $\mathbb{Z}_2^n$. We also study the standard monomials with respect to the lexicographical ordering for these ideals and derive a distribution result.
description: 22 pages. New title. The connection between the boolean polynomial and its zero set is more carefully studied than in the earlier versions of the paper. There is also an new section about the connection between lexicographical standard monomials and boolean ideals
Bond Breaking and Bond Formation: How Electron Correlation is Captured in Many-Body Perturbation Theory and Density-Functional Theory
Creators: name: Caruso, Fabio
name: Rohr, Daniel R.
name: Hellgren, Maria
name: Ren, Xinguo
name: Rinke, Patrick
name: Rubio, Angel
name: Scheffler, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: For the paradigmatic case of H2-dissociation we compare state-of-the-art many-body perturbation theory (MBPT) in the GW approximation and density-functional theory (DFT) in the exact-exchange plus random-phase approximation for the correlation energy (EX+cRPA). For an unbiased comparison and to prevent spurious starting point effects both approaches are iterated to full self-consistency (i.e. sc-RPA and sc-GW). The exchange-correlation diagrams in both approaches are topologically identical, but in sc-RPA they are evaluated with non-interacting and in sc-GW with interacting Green functions. This has a profound consequence for the dissociation region, where sc-RPA is superior to sc-GW. We argue that for a given diagrammatic expansion, the DFT framework outperforms the many-body framework when it comes to bond-breaking. We attribute this to the difference in the correlation energy rather than the treatment of the kinetic energy.
description: 6 pages, 4 figures
Tim Thompson (Hrsg.), The Archaeology of Cremation
Creators: name: Grosskopf, Birgit
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Tim Thompson (Hrsg.), The Archaeology of Cremation. Burned Human Remains in Funerary Studies. Studies in Funerary Archaeology Band 8. Oxbow Books, Oxford 2015. ISBN 978-1-78297-848-0. xii + 256 Seiten
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 96 2018(2019)
Reaction-Diffusion Processes with Nonlinear Diffusion
Creators: name: Krapivsky, P. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study reaction-diffusion processes with concentration-dependent diffusivity. First, we determine the decay of the concentration in the single-species and two-species diffusion-controlled annihilation processes. We then consider two natural inhomogeneous realizations. The two-species annihilation process is investigated in the situation when the reactants are initially separated, namely each species occupies a half space. In particular, we determine the growth law of the width of the reaction zone. The single-species annihilation process is studied in the situation when the spatially localized source drives the system toward the non-equilibrium steady state. Finally we investigate a dissolution process with a localized source of diffusing atoms which react with initially present immobile atoms forming immobile molecules.
description: Figure and references added, final version
Potential Theory in Classical Electrodynamics
Creators: name: Engelhardt, Wolfgang
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In Maxwell's classical theory of electrodynamics the fields are frequently expressed by potentials in order to facilitate the solution of the first order system of equations. This method obscures, however, that there exists an inconsistency between Faraday's law of induction and Maxwell's flux law. As a consequence of this internal contradiction there is neither gauge invariance, nor exist unique solutions in general. It is also demonstrated that inhomogeneous wave equations cannot be solved by retarded integrals.
description: 8 pages, 1 figure, LaTeX. Simplified argument in section 2 suggested by Dr. Peter Enders (see Acknowledgments). Expanded argument in section 4. Results unchanged
Continuous-time discrete-space models for animal movement
Creators: name: Hanks, Ephraim M.
name: Hooten, Mevin B.
name: Alldredge, Mat W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The processes influencing animal movement and resource selection are complex and varied. Past efforts to model behavioral changes over time used Bayesian statistical models with variable parameter space, such as reversible-jump Markov chain Monte Carlo approaches, which are computationally demanding and inaccessible to many practitioners. We present a continuous-time discrete-space (CTDS) model of animal movement that can be fit using standard generalized linear modeling (GLM) methods. This CTDS approach allows for the joint modeling of location-based as well as directional drivers of movement. Changing behavior over time is modeled using a varying-coefficient framework which maintains the computational simplicity of a GLM approach, and variable selection is accomplished using a group lasso penalty. We apply our approach to a study of two mountain lions (Puma concolor) in Colorado, USA.
description: Published at http://dx.doi.org/10.1214/14-AOAS803 in the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Suitability of hybrid gravitational waveforms for unequal-mass binaries
Creators: name: MacDonald, Ilana
name: Mroue, Abdul H.
name: Pfeiffer, Harald P.
name: Boyle, Michael
name: Kidder, Lawrence E.
name: Scheel, Mark A.
name: Szilagyi, Bela
name: Taylor, Nicholas W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This article studies sufficient accuracy criteria of hybrid post-Newtonian (PN) and numerical relativity (NR) waveforms for parameter estimation of strong binary black-hole sources in second- generation ground-based gravitational-wave detectors. We investigate equal-mass non-spinning binaries with a new 33-orbit NR waveform, as well as unequal-mass binaries with mass ratios 2, 3, 4 and 6. For equal masses, the 33-orbit NR waveform allows us to recover previous results and to extend the analysis toward matching at lower frequencies. For unequal masses, the errors between different PN approximants increase with mass ratio. Thus, at 3.5PN, hybrids for higher-mass-ratio systems would require NR waveforms with many more gravitational-wave (GW) cycles to guarantee no adverse impact on parameter estimation. Furthermore, we investigate the potential improvement in hybrid waveforms that can be expected from 4th order post-Newtonian waveforms, and find that knowledge of this 4th post-Newtonian order would significantly improve the accuracy of hybrid waveforms.
description: 11 pages, 14 figures
Manuals Estudiants 3 Sessions Alfabetització digital crítica - Universitat de Barcelona x Institut Pedralbes
Creators: name: Jiménez Torras, Dídac
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390307
subject: Teacher education and professional development of educators
classificationCode: 360502
subject: Computer gaming and animation

description: ENG: This group of resources is meant to be used by students (15–16 years) in three 1-hour sessions to learn media literacy. The teachers may look at these in addition to their instructions. The resources were made in 2024; they have been revised and iterated 0 times since.CAT: Aquest grup de recursos està pensat per ser utilitzat pels estudiants (3–4 ESO) en tres sessions d'1 hora per aprendre l'alfabetització digital crítica. Els professors poden mirar els documents a més de les seves instruccions. Els recursos es van fer l'any 2024; des d'aleshores s'han revisat i actualitzat 0 vegades.
Klassifikation von Anforderungen und Informationen zur Unterstützung von Qualitätssicherungsprozessen - Primärdaten empirische Studien
Creators: name: Winkler, Jonas Paul
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: Anforderungsmanagement
subject: Qualitätssicherung
subject: maschinelles Lernen
subject: empirische Forschung

description: Dieses Archiv enthält die Daten, die in der Dissertation „Klassifikation von Anforderungen und Informationen zur Unterstützung von Qualitätssicherungsprozessen“ von Jonas Paul Winkler zur Evaluation der gezeigten Ansätze erhoben wurden. Die Dissertation stellt einen Ansatz vor, durch den Benutzer bei manuell durchzuführenden Aufgaben durch Automation unterstützt werden können. In insgesamt drei empirischen Experimenten wurde dazu die Leistung von zwei Gruppen von Anwendern untersucht, wobei eine Gruppe die Aufgabe manuell durchgeführt hat und die andere Gruppe durch den vorgestellten Ansatz unterstützt wurde.Die Aufgabe besteht darin, in einer vorgegebenen Sammlung von Anforderungstexten Fehler zu identifizieren und zu korrigieren. Die Texte sind entweder als „Information“ oder als „Anforderung“ gekennzeichnet. Die Anwender müssen entscheiden, ob diese Kennzeichnung korrekt ist.
El auto sacramental calderoniano en el contexto contemporáneo. Aspectos estéticos y políticos para su “autonomización”
Creators: name: Kasten, Carey
Publisher: name: HeLix - Dossiers zur romanischen Literaturwissenschaft
Year: 2019

description: The auto sacramental has been staged and adapted throughout the twentieth and twenty-first centuries for different aesthetic and political reasons. Certain characteristics of the genre –such as its propagandistic sacralization of national myth, its dependence on state financing, its allegorical structure and its tendency toward extreme theatricality– facilitate a political reading of the auto sacramental. This article outlines aspects of the baroque auto that render it a genre that is not only attractive but also relevant on the contemporary stage. The article begins with a discussion of Fiesta Barroca, a street spectacle directed by Miguel Narros to be performed on the streets on Madrid to celebrate Madrid as the European Cultural Capital in 1992. Throughout I provide a detailed examination of the characteristics of the auto mentioned above in their original context to understand how this apparently anachronistic genre can be staged in a contemporary context.
description: HeLix - Dossiers zur romanischen Literaturwissenschaft, Bd. 12 (2019): Auto sacramental: Aktuelle Forschungsbeiträge zum Fronleichnamsspiel in Spanien und Hispanoamerika
On representing chemical environments
Creators: name: Bartók, Albert P.
name: Kondor, Risi
name: Csányi, Gábor
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We review some recently published methods to represent atomic neighbourhood environments, and analyse their relative merits in terms of their faithfulness and suitability for fitting potential energy surfaces. The crucial properties that such representations (sometimes called descriptors) must have are differentiability with respect to moving the atoms, and invariance to the basic symmetries of physics: rotation, reflection, translation, and permutation of atoms of the same species. We demonstrate that certain widely used descriptors that initially look quite different are specific cases of a general approach, in which a finite set of basis functions with increasing angular wave numbers are used to expand the atomic neighbourhood density function. Using the example system of small clusters, we quantitatively show that this expansion needs to be carried to higher and higher wave numbers as the number of neighbours increases in order to obtain a faithful representation, and that variants of the descriptors converge at very different rates. We also propose an altogether new approach, called Smooth Overlap of Atomic Positions (SOAP), that sidesteps these difficulties by directly defining the similarity between any two neighbourhood environments, and show that it is still closely connected to the invariant descriptors. We test the performance of the various representations by fitting models to the potential energy surface of small silicon clusters and the bulk crystal.
description: 13 pages, 11 figures