cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Lichnerowicz equation on compact manifolds with boundary
Creators: name: Holst, Michael
name: Tsogtgerel, Gantumur
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this article we initiate a systematic study of the well-posedness theory of the Einstein constraint equations on compact manifolds with boundary. This is an important problem in general relativity, and it is particularly important in numerical relativity, as it arises in models of Cauchy surfaces containing asymptotically flat ends and/or trapped surfaces. Moreover, a number of technical obstacles that appear when developing the solution theory for open, asymptotically Euclidean manifolds have analogues on compact manifolds with boundary. As a first step, here we restrict ourselves to the Lichnerowicz equation, also called the Hamiltonian constraint equation, which is the main source of nonlinearity in the constraint system. The focus is on low regularity data and on the interaction between different types of boundary conditions, which has not been carefully analyzed before. In order to develop a well-posedness theory that mirrors the existing theory for the case of closed manifolds, we first generalize the Yamabe classification to nonsmooth metrics on compact manifolds with boundary. We then extend a result on conformal invariance to manifolds with boundary, and prove a uniqueness theorem. Finally, by using the method of sub- and super-solutions (order-preserving map iteration), we establish several existence results for a large class of problems covering a broad parameter regime, which includes most of the cases relevant in practice.
description: 33 pages, no figures. Version 2 is a minor revision based on comments received during review
Numerical results for the Edwards-Anderson spin-glass model at low temperature
Creators: name: Fernández, J. F.
name: Alonso, J. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have simulated Edwards-Anderson (EA) as well as Sherrington-Kirkpatrick systems of L^3 spins. After averaging over large sets of EA system samples of 3 =< L =< 10, we obtain accurate numbers for distributions p(q) of the overlap parameter q at very low temperature T. We find p(0)/T --> 0.233(4) as T --> 0. This is in contrast with the droplet scenario of spin glasses. We also study the number of mismatched links --between replica pairs-- that come with large scale excitations. Contributions from small scale excitations are discarded. We thus obtain for the fractal dimension of outer surfaces of q~0 excitations in the EA model d_s --> 2.59(3) as T tends to 0. This is in contrast with d_s --> 3 as T --> 0 that is predicted by mean field theory for the macroscopic limit.
description: 9 LaTeX pages, 12 pdf figures, 1 table
Quark sector CP violation of the universal seesaw model
Creators: name: Kawasaki, Ryomu
name: Morozumi, Takuya
name: Umeeda, Hiroyuki
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the CP violation of universal seesaw model, especially its quark sector. The model is based on SU(2)_L \times SU(2)_R \times U(1)_{Y^\prime}. In order to count the number of parameters in quark sector, we use the degree of freedom of weak basis transformation. For N(3)-generation model, the number of CP violating phase in quark sector is identified as 3N^2-3N+1 (19). We also construct nineteen CP violating weak basis invariants of Yukawa coupling matrices and SU(2) singlet quark mass matrices in the three-generation universal seesaw model. The quark interaction terms induced by neutral currents are given as an exact formula. Both of the charged current and the neutral current are expressed in terms of the mass basis by finding the transformations from weak basis to mass basis. Finally, we calculate the mixing matrix element approximately assuming that the SU(2)_R breaking scale v_R is much larger than the electro-weak breaking scale v_L.
description: 32pages
CRediT: ventajas y tensiones en torno a su uso
Creators: name: del Rio Riande, Gimena
Publisher: name: Zenodo
Year: 2023
Subjects: credit
contributor
journals
open science
Latin America

description: Presentación para la Red de Editores de Revistas de Extensión Universitaria (REDREU). Asociación de Universidades Grupo Montevideo. viernes 31 de marzo de 2023.
Second order QCD corrections to jet production at hadron colliders: the all-gluon contribution
Creators: name: Ridder, Aude Gehrmann-De
name: Gehrmann, Thomas
name: Glover, E. W. N.
name: Pires, Joao
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report the calculation of next-to-next-to-leading order (NNLO) QCD corrections in the purely gluonic channel to dijet production and related observables at hadron colliders. Our result represents the first NNLO calculation of a massless jet observable at hadron colliders, and opens the path towards precision QCD phenomenology with the LHC.
description: 5 pages, 5 figures
Improving Network Efficiency by Removing Energy Holes in WSNs
Creators: name: Rasheedl, M. B.
name: Javaid, N.
name: Javaid, A.
name: Khan, M. A.
name: Bouk, S. H.
name: Khan, Z. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Cluster based Wireless Sensor Networks (WSNs) have been widely used for better performance in terms of energy efficiency. Efficient use of energy is challenging task of designing these protocols. Energy holedare created due to quickly drain the energy of a few nodes due to non-uniform distribution in the network. Normally, energy holes make the data routing failure when nodes transmit data back to the base station. We proposedEnergy-efficient HOleRemoving Mechanism (E-HORM) technique to remove energy holes. In this technique, we use sleep and awake mechanism for sensor nodes to save energy. This approach finds the maximum distance node to calculate the maximum energy for data transmission. We considered it as a threshold energy Eth. Every node first checks its energy level for data transmission. If the energy level is less than Eth, it cannot transmit data. We also explain mathematically the energy consumption and average energy saving of sensor nodes in each round. Extensive simulations showed that when use this approach for WSNs significantly helps to extend the network lifetime and stability period.
A simple model of ultrasound propagation in a cavitating liquid. Part I: Theory, nonlinear attenuation and traveling wave generation
Creators: name: Louisnard, Olivier
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The bubbles involved in sonochemistry and other applications of cavitation oscillate inertially. A correct estimation of the wave attenuation in such bubbly media requires a realistic estimation of the power dissipated by the oscillation of each bubble, by thermal diffusion in the gas and viscous friction in the liquid. Both quantities and calculated numerically for a single inertial bubble driven at 20 kHz, and are found to be several orders of magnitude larger than the linear prediction. Viscous dissipation is found to be the predominant cause of energy loss for bubbles small enough. Then, the classical nonlinear Caflish equations describing the propagation of acoustic waves in a bubbly liquid are recast and simplified conveniently. The main harmonic part of the sound field is found to fulfill a nonlinear Helmholtz equation, where the imaginary part of the squared wave number is directly correlated with the energy lost by a single bubble. For low acoustic driving, linear theory is recovered, but for larger drivings, namely above the Blake threshold, the attenuation coefficient is found to be more than 3 orders of magnitude larger then the linear prediction. A huge attenuation of the wave is thus expected in regions where inertial bubbles are present, which is confirmed by numerical simulations of the nonlinear Helmholtz equation in a 1D standing wave configuration. The expected strong attenuation is not only observed but furthermore, the examination of the phase between the pressure field and its gradient clearly demonstrates that a traveling wave appears in the medium.
On the S-matrix conjecture
Creators: name: Drnovšek, Roman
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 15A45, 15A60

description: Motivated with a problem in spectroscopy, Sloane and Harwit conjectured in 1976 what is the minimal Frobenius norm of the inverse of a matrix having all entries from the interval [0, 1]. In 1987, Cheng proved their conjecture in the case of odd dimensions, while for even dimensions he obtained a slightly weaker lower bound for the norm. His proof is based on the Kiefer-Wolfowitz equivalence theorem from the approximate theory of optimal design. In this note we give a short and simple proof of his result.
description: minor changes; to appear in Linear Algebra and its Applications
Tailorable Stimulated Brillouin Scattering in Nanoscale Silicon Waveguides
Creators: name: Shin, Heedeuk
name: Qiu, Wenjun
name: Jarecki, Robert
name: Cox, Jonathan A.
name: Olsson, Roy H.
name: Starbuck, Andrew
name: Wang, Zheng
name: Rakich, Peter T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: While nanoscale modal confinement radically enhances a variety of nonlinear light-matter interactions within silicon waveguides, traveling-wave stimulated Brillouin scattering nonlinearities have never been observed in silicon nanophotonics. Through a new class of hybrid photonic-phononic waveguides, we demonstrate tailorable traveling-wave forward stimulated Brillouin scattering in nanophotonic silicon waveguides for the first time, yielding 3000 times stronger forward SBS responses than any previous waveguide system. Simulations reveal that a coherent combination of electrostrictive forces and radiation pressures are responsible for greatly enhanced photon-phonon coupling at nano-scales. Highly tailorable Brillouin nonlinearities are produced by engineering the structure of a membrane-suspended waveguide to yield Brillouin resonances from 1 to 18 GHz through high quality-factor (>1000) phonon modes. Such wideband and tailorable stimulated Brillouin scattering in silicon photonics could enable practical realization of on-chip slow-light devices, RF-photonic filtering and sensing, and ultra-narrow-band laser sources by using standard semiconductor fabrication and CMOS technologies.
A remark about wave equations on the extreme Reissner-Nordström black hole exterior
Creators: name: Bizoń, Piotr
name: Friedrich, Helmut
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a massless scalar field propagating on the exterior of the extreme Reissner-Nordström black hole. Using a discrete conformal symmetry of this spacetime, we draw a one-to-one relationship between the behavior of the field near the future horizon and near future null infinity. In particular, we show that the polynomial growth of the second and higher transversal derivatives along the horizon, recently found by Aretakis, reflects well known facts about the retarded time asymptotics at null infinity.
description: 9 pages, a sentence added to the abstract, published version
Z-SEP: Zonal-Stable Election Protocol for Wireless Sensor Networks
Creators: name: Faisal, S.
name: Javaid, N.
name: Javaid, A.
name: Khan, M. A.
name: Bouk, S. H.
name: Khan, Z. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Wireless Sensor Networks (WSNs) are comprised of thousands of sensor nodes, with restricted energy, that co-operate to accomplish a sensing task. Various routing Protocols are designed for transmission in WSNs. In this paper, we proposed a hybrid routing protocol: Zonal-Stable Election Protocol (Z-SEP) for heterogeneous WSNs. In this protocol, some nodes transmit data directly to base station while some use clustering technique to send data to base station as in SEP. We implemented Z-SEP and compared it with traditional Low Energy adaptive clustering hierarchy (LEACH) and SEP. Simulation results showed that Z-SEP enhanced the stability period and throughput than existing protocols like LEACH and SEP.
Courant Algebroids. A Short History
Creators: name: Kosmann-Schwarzbach, Yvette
Publisher: name: arXiv
Year: 2012
Subjects: subject: History and Overview (math.HO)
subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D17 (primary) 17B62, 17B66, 22A22, 53C15 (secondary)

description: The search for a geometric interpretation of the constrained brackets of Dirac led to the definition of the Courant bracket. The search for the right notion of a "double" for Lie bialgebroids led to the definition of Courant algebroids. We recount the emergence of these concepts.
description: Dedicated to Peter Olver
A nonextensive approach to the stellar rotational evolution I. F and G type stars
Creators: name: de Freitas, D. B.
name: De Medeiros, J. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The pioneering study by Skumanich (1972) showed that the rotational velocity of G-type Main-Sequence (MS) stars decreases with stellar age according to $$ $\propto$ $t^{-1/2}$. This relationship is consistent with simple theories of angular momentum loss from rotating stars, where an ionized wind is coupled to the star by a magnetic field. The present study introduces a new approach to the study of stellar rotational braking in unsaturated F and G type stars limited in age and mass, connecting angular momentum loss by magnetic stellar wind with Tsallis nonextensive statistical mechanics. As a result, we show that the rotation-age relationship can be well reproduced using a nonextensive approach from Tsallis nonextensive models. Here, the index $q$, which is related to the degree of nonextensivity, can be associated to the dynamo process and to magnetic field geometry, offering relevant information on the level of stellar magnetic braking for F- and G-type Main-Sequence stars.
description: 8 pages, 3 figures, MNRAS accepted
Thermally driven spin and charge currents in thin NiFe2O4/Pt films
Creators: name: Meier, Daniel
name: Kuschel, Timo
name: Shen, Liming
name: Gupta, Arunava
name: Kikkawa, Takashi
name: Uchida, Ken-ichi
name: Saitoh, Eiji
name: Schmalhorst, Jan-Michael
name: Reiss, Günter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present results on the longitudinal spin Seebeck effect (LSSE) shown by semiconducting ferrimagnetic NiFe2O4/Pt films from room temperature down to 50K base temperature. To the best of our knowledge, this is the first observation of spin caloric effect in NiFe2O4 thin films. The temperature dependence of the conductivity has been studied in parallel to obtain information about the origin of the electric potentials detected at the Pt coverage of the ferrimagnet in order to distinguish the LSSE from the anomalous Nernst effect. Furthermore, the dependence of the LSSE on temperature gradients as well as the influence of an external magnetic field direction is investigated.
Leptogenys Roger 1861
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Leptogenys

description: Genre LEPTOGENYS.
Leptogenys, Roger.
[[worker]]. Mandibules très longues, très étroites, presque cylindriques, articulees extrêmement loin l'une de l'autre, aux angles antérieurs latéraux de la tête. Palpes maxillaires de quatre, labiaux de trois articles. Epistome fortement caréné, prolongé en angle aigu entre les articulations des antennes; son bord antérieur avancé triangulairement. Antennes de douze articles. Thorax et n œ ud du pédicule mutiques. Crochets des tarses bidentés.
[[male]]. Mandibules courtes, sans dents, abords parallèles. Epistome court, triangulaire, arrondi devant. Antennes de treize articles, à scape court et à premier article du funicule très court. Pédicule comme chez la [[worker]]. Organes génitaux petits, cachés. Ailes avec deux cellules cubitales, une cellule radiale fermée et une cellule discoïdale.
[[queen]]. Inconnue.
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on page 109, DOI: 10.5281/zenodo.9896
title: Studio sulla valutazione degli effetti dell’accordo di libero scambio UE-Mercosur sul commercio estero italiano
Creators: name: Salvatici,  Luca
name: Nenci, Silvia
Publisher: name: RomaTrE-Press
Year: 2021

description: Lo Studio presenta un’analisi descrittiva dell’interscambio tra Italia e Mercosur e una simulazione controfattuale volta a valutare come l’Accordo di associazione commerciale tra Unione Europea (UE) e Mercosur potrebbe influire sui flussi commerciali dell’Italia. La prima parte è dedicata alla ricostruzione delle relazioni economiche tra Italia e Mercosur, con una disamina degli interessi commerciali italiani in termini di esportazioni e importazioni e un approfondimento dedicato al settore agroalimentare. La seconda parte riguarda una simulazione quantitativa condotta attraverso un modello di equilibrio generale globale per valutare gli effetti economici attesi dell’Accordo. I risultati della simulazione mostrano che i partner su entrambe le sponde dell’Atlantico potranno registrare un aumento dei flussi commerciali e del PIL a seguito dell’Accordo, sebbene una certa eterogeneità dei risultati, sia a livello di aree che settoriale, è stata riscontrata nello Studio.
title: Less is more - exnovation and the urban mobility transition : recommended course of action for implementing the sustainable mobility transition through exnovation
Creators: name: Wetzchewald, Alina
Publisher: name: Wuppertal Institut für Klima, Umwelt, Energie
Year: 2023
Subjects: subject: 380 Handel, Kommunikation, Verkehr

description: The objectives of the urban mobility transition have been clearly set out: gaining more space for urban living, reducing noise and emissions that have a negative impact on the climate and improving air quality. That means less traffic in cities and more trips made using environmentally-friendly modes of transport - i.e., walking, cycling or foot scooters or public transport. In transport policy, the focus is generally on innovative approaches to shaping the mobility transition. This paper aims to explain the concept of exnovation in the context of the urban mobility transition and to underpin it using specific practical examples. In the course of this process, it is intended to identify the obstacles that stand in the way of rolling out the concept on an area-wide basis in order to deduce strategies and courses of action for expanding the concept in the future.
A simple model of ultrasound propagation in a cavitating liquid. Part II: Primary Bjerknes force and bubble structures
Creators: name: Louisnard, Olivier
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In a companion paper, a reduced model for propagation of acoustic waves in a cloud of inertial cavitation bubbles was proposed. The wave attenuation was calculated directly from the energy dissipated by a single bubble, the latter being estimated directly from the fully nonlinear radial dynamics. The use of this model in a mono-dimensional configuration has shown that the attenuation near the vibrating emitter was much higher than predictions obtained from linear theory, and that this strong attenuation creates a large traveling wave contribution, even for closed domain where standing waves are normally expected. In this paper, we show that, owing to the appearance of traveling waves, the primary Bjerknes force near the emitter becomes very large and tends to expel the bubbles up to a stagnation point. Two-dimensional axi-symmetric computations of the acoustic field created by a large area immersed sonotrode are also performed, and the paths of the bubbles in the resulting Bjerknes force field are sketched. Cone bubble structures are recovered and compare reasonably well to reported experimental results. The underlying mechanisms yielding such structures is examined, and it is found that the conical structure is generic and results from the appearance a sound velocity gradient along the transducer area. Finally, a more complex system, similar to an ultrasonic bath, in which the sound field results from the flexural vibrations of a thin plate, is also simulated. The calculated bubble paths reveal the appearance of other commonly observed structures in such configurations, such as streamers and flare structures.
New physics in the weak interaction of $\bar B\to D^{(*)}τ\barν$
Creators: name: Tanaka, Minoru
name: Watanabe, Ryoutaro
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent experimental results on exclusive semi-tauonic B meson decays, B -> D(*) tau nu, showing sizable deviations from the standard model prediction, suggest a new physics in which the structure of the relevant weak charged interaction may differ from that of the standard model. We study the exclusive semi-tauonic B decays in a model-independent manner using the most general set of four-Fermi interactions in order to clarify possible structures of the charged current in new physics. It turns out that correlations among observables including tau and D* polarizations and q^2 distributions are useful to distinguish possible new physics operators. Further, we investigate some interesting models to exhibit the advantage of our model-independent analysis. As a result, we find that two Higgs doublet models without tree-level FCNC and the minimal supersymmetric standard model with R-parity violation are unlikely to explain the present experimental data, while two Higgs doublet models with FCNC and a leptoquark model are consistent with the data.
description: 29 pages, 8 figures, 2 additional references, Typos and numerical errors in figures are corrected
Die keltisch-römische Siedlung von Wallendorf "Kasselt" (Kr. Bitburg-Prüm). Archäologische und naturwissenschaftliche Untersuchungen im Rahmen des Schwerpunktprogrammes "Romanisierung" der Deutschen Forschungsgemeinschaft
Creators: name: Krauße, Dirk
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 18, Nr. 2 (1995): Archäologische Informationen
Test of two new parameterizations of the Generalized Parton Distribution $H$
Creators: name: Mezrag, C.
name: Moutarde, H.
name: Sabatié, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In 2011 Radyushkin outlined the practical implementation of the One-Component Double Distribution formalism in realistic Generalized Parton Distribution models. We compare the One-Component Double Distribution framework to the standard one and compute Deeply Virtual Compton Scattering observables for both. In particular the new implementation is more flexible, offering a greater range of variation of the real and imaginary parts of the associated Compton Form Factor while still allowing to recover results similar to the classical approach. Moreover the polynomiality property is satisfied up to the highest order. Although the comparison to experimental data may be improved, the One-Component Double Distribution modeling is thus an attractive alternative.
description: 38 pages, 12 figures
Relativistic Langevin Dynamics in Expanding Media
Creators: name: He, Min
name: van Hees, Hendrik
name: Gossiaux, Pol B.
name: Fries, Rainer J.
name: Rapp, Ralf
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the consequences of different realizations of diffusion processes in relativistic Langevin simulations. We elaborate on the Ito-Stratonovich dilemma by showing how microscopically calculated transport coefficients as obtained from a Boltzmann/Fokker-Planck equation can be implemented to lead to an unambiguous realization of the Langevin process. Pertinent examples within the pre-point (Ito) and post-point (Hänggi-Klimontovich) Langevin prescriptions are worked out explicitly. Deviations from this implementation are shown to generate variants of the Boltzmann distribution as the stationary (equilibrium) solutions. Finally, we explicitly verify how the Lorentz invariance of the Langevin process is maintained in the presence of an expanding medium, including the case of an "elliptic flow" transmitted to a Brownian test particle. This is particularly relevant for using heavy-flavor diffusion as a quantitative tool to diagnose transport properties of QCD matter as created in ultrarelativistic heavy-ion collisions.
description: 8 pages, 4 figures; v2: Reference added
title: Weniger ist Mehrwert : Exnovation und die urbane Verkehrswende ; Handlungsempfehlung für die aktive Gestaltung der Verkehrswende durch Exnovation
Creators: name: Wetzchewald, Alina
Publisher: name: Wuppertal Institut für Klima, Umwelt, Energie
Year: 2023
Subjects: subject: 380 Handel, Kommunikation, Verkehr

description: Das Ziel einer urbanen Verkehrswende ist klar definiert: mehr Fläche für städtisches Leben, weniger Lärm und klimaschädliche Emissionen und eine saubere Luft. Das bedeutet weniger Autoverkehr in den Städten und mehr Wege zu Fuß, mit dem Fahrrad, dem Tretroller oder mit dem öffentlichen Verkehr. Dabei reicht es nicht aus nur auf Innovationen und attraktive Alternativen zu setzen - es braucht auch Exnovation, also restriktive und reduzierende Ansätze für den Autoverkehr. Dieser Zukunftsimpuls zeigt, wie die urbane Verkehrswende durch Exnovation beschleunigt und richtungssicher umgesetzt werden kann, welche Hemmnisse es bei bisher umgesetzten deutschen und europäischen Projekten gibt und welche Strategie- und Handlungsempfehlungen sich daraus ableiten lassen.
Log-periodic critical amplitudes: a perturbative approach
Creators: name: Derrida, Bernard
name: Giacomin, Giambattista
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Log-periodic amplitudes appear in the critical behavior of a large class of systems, in particular when a discrete scale invariance is present. Here we show how to compute these critical amplitudes perturbatively when they originate from a renormalization map which is close to a monomial. In this case, the log-periodic amplitudes of the subdominant corrections to the leading critical behavior can also be calculated.
description: 17 pages, 2 figures
Basis functions for solution of non-homogeneous wave equation
Creators: name: Khorasani, Sina
name: Karimi, Farhad
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this note we extend the Differential Transfer Matrix Method (DTMM) for a second-order linear ordinary differential equation to the complex plane. This is achieved by separation of real and imaginary parts, and then forming a system of equations having a rank twice the size of the real-valued problem. The method discussed in this paper also successfully removes the problem of dealing with essential singularities, which was present in the earlier formulations. Then we simplify the result for real-valued problems and obtain a new set of basis functions, which may be used instead of the WKB solutions. These basis functions not only satisfy the initial conditions perfectly, but also, may approach the turning points without the divergent behavior, which is observed in WKB solutions. Finally, an analytical transformation in the form of a matrix exponential is presented for improving the accuracy of solutions.
description: to appear in Proc. SPIE, vol. 8619
Xth European Meeting of the Paleopathology Association. Göttingen, 29th August-3rd September 1994. Ein Tagungsbericht.
Creators: name: Teegen, Wolf-Rüdiger
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 17, Nr. 2 (1994): Archäologische Informationen
Nonextensive triplet in geological faults system
Creators: name: de Freitas, D. B.
name: França, G. S.
name: Scheerer, T. M.
name: Vilar, C. S.
name: Silva, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The San Andreas fault (SAF) in the USA is one of the most investigated self-organizing systems in nature. In this paper, we studied some geophysical properties of the SAF system in order to analyze the behavior of earthquakes in the context of Tsallis's $q$--Triplet. To that end, we considered 134,573 earthquake events in magnitude interval $2\leq m<8$, taken from the Southern Earthquake Data Center (SCEDC, 1932 - 2012). The values obtained ("$q$--Triplet"$\equiv$$\{$$q$$_{stat}$,$q$$_{sen}$,$q$$_{rel}$$\}$) reveal that the $q_{stat}$--Gaussian behavior of the aforementioned data exhibit long-range temporal correlations. Moreover, $q_{sen}$ exhibits quasi-monofractal behavior with a Hurst exponent of 0.87.
description: 5 pages, 6 figures, EPL accepted
Estimating the large-scale angular power spectrum in the presence of systematics: a case study of Sloan Digital Sky Survey quasars
Creators: name: Leistedt, Boris
name: Peiris, Hiranya V.
name: Mortlock, Daniel J.
name: Benoit-Lévy, Aurélien
name: Pontzen, Andrew
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The angular power spectrum is a powerful statistic for analysing cosmological signals imprinted in the clustering of matter. However, current galaxy and quasar surveys cover limited portions of the sky, and are contaminated by systematics that can mimic cosmological signatures and jeopardise the interpretation of the measured power spectra. We provide a framework for obtaining unbiased estimates of the angular power spectra of large-scale structure surveys at the largest scales using quadratic estimators. The method is tested by analysing the 600 CMASS mock catalogues constructed by Manera et al. (2013) for the Baryon Oscillation Spectroscopic Survey (BOSS). We then consider the Richards et al. (2009) catalogue of photometric quasars from the Sixth Data Release (DR6) of the Sloan Digital Sky Survey (SDSS), which is known to include significant stellar contamination and systematic uncertainties. Focusing on the sample of ultraviolet-excess (UVX) sources, we show that the excess clustering power present on the largest-scales can be largely mitigated by making use of improved sky masks and projecting out the modes corresponding to the principal systematics. In particular, we find that the sample of objects with photometric redshift $1.3 < z_p < 2.2$ exhibits no evidence of contamination when using our most conservative mask and mode projection. This indicates that any residual systematics are well within the statistical uncertainties. We conclude that, using our approach, this sample can be used for cosmological studies.
description: 18 pages, 18 figures. Version accepted by MNRAS
Preistoria e protostoria in Etruria - terzo incontro di studio (Manciano - Farnese, 12.-14. 5.1995) - Ein Tagungsbericht
Creators: name: Teegen, Wolf-Rüdiger
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 18, Nr. 2 (1995): Archäologische Informationen
Fast and robust population transfer in two-level quantum systems with dephasing noise and/or systematic frequency errors
Creators: name: Lu, Xiao-Jing
name: Chen, Xi
name: Ruschhaupt, A.
name: Alonso, D.
name: Guérin, S.
name: Muga, J. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We design, by invariant-based inverse engineering, driving fields that invert the population of a two-level atom in a given time, robustly with respect to dephasing noise and/or systematic frequency shifts. Without imposing constraints, optimal protocols are insensitive to the perturbations but need an infinite energy. For a constrained value of the Rabi frequency, a flat $π$ pulse is the least sensitive protocol to phase noise but not to systematic frequency shifts, for which we describe and optimize a family of protocols.
description: 7 pages, 2 figures
Lagrangian single particle turbulent statistics through the Hilbert-Huang Transform
Creators: name: Huang, Yongxiang
name: Biferale, Luca
name: Calzavarini, Enrico
name: Sun, Chao
name: Toschi, Federico
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The Hilbert-Huang transform is applied to analyze single particle Lagrangian velocity data from numerical simulations of hydrodynamic turbulence. The velocity trajectory is described in terms of a set of intrinsic mode functions, C_{i}(t), and of their instantaneous frequency, ω_{i}(t). On the basis of this decomposition we define the ω-conditioned statistical moments of the C_{i} modes, named q-order Hilbert Spectra (HS). We show that such new quantities have enhanced scaling properties as compared to traditional Fourier transform- or correlation-based (Structure Functions) statistical indicators, thus providing better insights into the turbulent energy transfer process. We present a clear empirical evidence that the energy-like quantity, i.e. the second-order HS, displays a linear scaling in time in the inertial range, as expected from dimensional analysis and never observed before. We also measure high order moment scaling exponents in a direct way, without resorting the Extended Self Similarity (ESS) procedure. This leads to a new estimate of the Lagrangian structure functions exponents which are consistent with the multifractal prediction in the Lagrangian frame as proposed in [Biferale et al., Phys. Rev. Lett. vol. 93, 064502 (2004)].
description: 5 pages, 5 figures
The hard-core model on random graphs revisited
Creators: name: Barbier, Jean
name: Krzakala, Florent
name: Zdeborová, Lenka
name: Zhang, Pan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We revisit the classical hard-core model, also known as independent set and dual to vertex cover problem, where one puts particles with a first-neighbor hard-core repulsion on the vertices of a random graph. Although the case of random graphs with small and very large average degrees respectively are quite well understood, they yield qualitatively different results and our aim here is to reconciliate these two cases. We revisit results that can be obtained using the (heuristic) cavity method and show that it provides a closed-form conjecture for the exact density of the densest packing on random regular graphs with degree K>=20, and that for K>16 the nature of the phase transition is the same as for large K. This also shows that the hard-code model is the simplest mean-field lattice model for structural glasses and jamming.
description: 9 pages, 2 figures, International Meeting on "Inference, Computation, and Spin Glasses" (ICSG2013), Sapporo, Japan
Worlds and Systems in Early Modern Europe
Creators: name: Ayala, Lucia
Publisher: name: arXiv
Year: 2013
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The structure, formation and evolution of the Universe were some of the main topics in the scientific debates during the 17th and 18th centuries in Europe. They involved novel ideas on the cosmos, which concerned aspects that were not considered before so emphatically, and which were fundamental for the future development of astronomy. This paper presents a brief account of several milestones within the gradual definition of pre-galactic systems: the historical role of the tradition of the plurality of worlds, the significance of Descartes, and the introduction of the Milky Way and nebulae in the discourses around the cosmic structure.
description: Refereed contribution to the proceedings of "Origins of the Expanding Universe: 1912-1932", M. J. Way & D. Hunter, eds., ASP Conf. Ser., Vol. 471 in press. A meeting held in September 2012 to mark the Centenary of Slipher's first measurement of the radial velocity of M31
The 2011 October Draconids Outburst. II. Meteoroid Chemical Abundances from Fireball Spectroscopy
Creators: name: Madiedo, J. M.
name: Trigo-Rodriguez, J. M.
name: Konovalova, N.
name: Williams, I. P.
name: Castro-Tirado, A. J.
name: Ortiz, J. L.
name: Cabrera-Caño, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: On October 8, 2011 the Earth crossed dust trails ejected from comet 21P/Giacobini-Zinner in the late 19th and early 20th Century. This gave rise to an outburst in the activity of the October Draconid meteor shower, and an international team was organized to analyze this event. The SPanish Meteor Network (SPMN) joined this initiative and recorded the October Draconids by means of low light level CCD cameras. In addition, spectroscopic observations were carried out. Tens of multi-station meteor trails were recorded, including an extraordinarily bright October Draconid fireball (absolute mag. -10.5) that was simultaneously imaged from three SPMN meteor ob-serving stations located in Andalusia. Its spectrum was obtained, showing a clear evolution in the relative intensity of emission lines as the fireball penetrated deeper into the atmosphere. Here we focus on the analysis of this remarkable spectrum, but also discuss the atmospheric trajectory, atmospheric penetration, and orbital data computed for this bolide which was probably released during 21P/Giacobini-Zinner return to perihelion in 1907. The spectrum is discussed together with the tensile strength for the October Draconid meteoroids. The chemical profile evolution of the main rocky elements for this extremely bright bolide is compared with the elemental abundances obtained for 5 October Draconid fireballs also recorded during our spectroscopic campaign but observed only at a single station. Significant chemical heterogeneity between the small meteoroids is found as we should expect for cometary aggregates being formed by diverse dust components.
description: Manuscript in press in Monthly Notices of the Royal Astronomical Society. Accepted for publication in MNRAS on April 28th, 2013 Manuscript Pages: 28 Tables: 5 Figures: 12. Manuscript associated: "The 2011 October Draconids outburst. I. Orbital elements, meteoroid fluxes and 21P/Giacobini-Zinner delivered mass to Earth" by Trigo-Rodriguez et al. is also in press in the same journal
$Ψ$ and $Υ$ Production In pp Collisions at 7.0 TeV
Creators: name: Kisslinger, Leonard S.
name: Das, Debasish
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is an extension of recent studies [arXiv:1207.3296] for $Υ(nS)$ and $Ψ(1S,2S)$ production at the LHC in pp collisions, $\sqrt{s}$=7.0 GeV, with the ALICE detector.
description: 5 pages, 5 figures
Urang Ampek Jinih (Manti)
Creators: name: B, Bahren
Publisher: name: Zenodo
Year: 2021
Subjects: Urang Ampek JInih
Local Genius
Minangkabau
Etnografi
Matrilineal
Language

description: Cerita tentang adat dan kebudayaan minangkabau
description: Cerita Minang
Infinite systems of interacting chains with memory of variable length - a stochastic model for biological neural nets
Creators: name: Galves, Antonio
name: Löcherbach, Eva
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35, 60G99

description: We consider a new class of non Markovian processes with a countable number of interacting components. At each time unit, each component can take two values, indicating if it has a spike or not at this precise moment. The system evolves as follows. For each component, the probability of having a spike at the next time unit depends on the entire time evolution of the system after the last spike time of the component. This class of systems extends in a non trivial way both the interacting particle systems, which are Markovian, and the stochastic chains with memory of variable length which have finite state space. These features make it suitable to describe the time evolution of biological neural systems. We construct a stationary version of the process by using a probabilistic tool which is a Kalikow-type decomposition either in random environment or in space-time. This construction implies uniqueness of the stationary process. Finally we consider the case where the interactions between components are given by a critical directed Erdös-Rényi-type random graph with a large but finite number of components. In this framework we obtain an explicit upper-bound for the correlation between successive inter-spike intervals which is compatible with previous empirical findings.
A PRESS statistic for two-block partial least squares regression
Creators: name: McWilliams, Brian
name: Montana, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Predictive modelling of multivariate data where both the covariates and responses are high-dimensional is becoming an increasingly popular task in many data mining applications. Partial Least Squares (PLS) regression often turns out to be a useful model in these situations since it performs dimensionality reduction by assuming the existence of a small number of latent factors that may explain the linear dependence between input and output. In practice, the number of latent factors to be retained, which controls the complexity of the model and its predictive ability, has to be carefully selected. Typically this is done by cross validating a performance measure, such as the predictive error. Although cross validation works well in many practical settings, it can be computationally expensive. Various extensions to PLS have also been proposed for regularising the PLS solution and performing simultaneous dimensionality reduction and variable selection, but these come at the expense of additional complexity parameters that also need to be tuned by cross-validation. In this paper we derive a computationally efficient alternative to leave-one-out cross validation (LOOCV), a predicted sum of squares (PRESS) statistic for two-block PLS. We show that the PRESS is nearly identical to LOOCV but has the computational expense of only a single PLS model fit. Examples of the PRESS for selecting the number of latent factors and regularisation parameters are provided.
A Herschel Survey of the [N II] 205 micron Line in Local Luminous Infrared Galaxies --- The [N II] 205 micron Emission as a Star Formation Rate Indicator
Creators: name: Zhao, Yinghe
name: Lu, Nanyao
name: Xu, C. Kevin
name: Gao, Yu
name: Lord, S.
name: Howell, J.
name: Isaak, K. G.
name: Charmandaris, V.
name: Diaz-Santos, T.
name: Appleton, P.
name: Evans, A.
name: Iwasawa, K.
name: Leech, J.
name: Mazzarella, J.
name: Petric, A. O.
name: Sanders, D. B.
name: Schulz, B.
name: Surace, J.
name: van der Werf, P. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present, for the first time, a statistical study of [N II] 205 mciron line emission for a large sample of local luminous infrared galaxies using Herschel Spectral and Photometric Imaging Receiver Fourier Transform Spectrometer (SPIRE FTS) data. For our sample of galaxies, we investigate the correlation between the [N II] luminosity (LNII) and the total infrared luminosity (LIR), as well as the dependence of LNII/LIR ratio on LIR, far infrared colors (IRAS $f_{60}/f_{100}$) and the [O III] 88 micron to [N II] luminosity ratio. We find that LNII correlates almost linearly with LIR for non AGN galaxies (all having $L_{IR} < 10^{12} L_solar$) in our sample, which implies that LNII can serve as a SFR tracer which is particularly useful for high redshift galaxies which will be observed with forthcoming submm spectroscopic facilities such as the Atacama Large Millimeter/submillimeter Array. Our analysis shows that the deviation from the mean LNII-LIR relation correlates with tracers of the ionization parameter, which suggests the scatter in this relation is mainly due to the variations in the hardness, and/or ionization parameter, of the ambient galactic UV field among the sources in our sample.
description: 6 emulateapj pages, 3 figures; ApJ Letter accepted
NWO DMP assessment rubric
Creators: name: Cruz, Maria
name: van den Berg, Eveline
Publisher: name: Zenodo
Year: 2023
Subjects: NWO
Data Management Plan
DMP
Assessment Rubric
Data Management Policy
FAIR data
RDM
Research Data Management

description: This is an assessment rubric for DMPs following the NWO Data Management Plan template in force from September 2020, which matches the Science Europe's Core Requirements for Data Management Plans. This rubric is intended to assist in the assessment of NWO data management plans, against the criteria required by NWO.
The rubric has been divided into 'performance criteria' (on the left hand side) that match the questions and guidance in the NWO DMP template (version September 2020). Each performance criterion is followed by descriptions ('performance levels') outlining what NWO considers to be a sufficient and an insufficient level of response. The descriptions are intended as examples of how the performance criteria might be addressed, based on the DMP template and its respective guidance, and are not considered to be exhaustive. NWO encourages researchers to be as detailed as possible in completing data management plans for NWO-funded projects.
This rubric is inspired by and based on the Wellcome DMP assessment rubric v2.0 (http://doi.org/10.5281/zenodo.257650) and the Ghent University rubrics for DMPs (https://github.com/DMPbelgium/Guidance/tree/master/DMPReviewRubrics).