cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On stable self-similar blow up for equivariant wave maps: The linearized problem
Creators: name: Donninger, Roland
name: Schoerkhuber, Birgit
name: Aichelburg, Peter C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L05, 35B44, 35C06

description: We consider co-rotational wave maps from (3+1) Minkowski space into the three-sphere. This is an energy supercritical model which is known to exhibit finite time blow up via self-similar solutions. The ground state self-similar solution $f_0$ is known in closed form and based on numerics, it is supposed to describe the generic blow up behavior of the system. In this paper we develop a rigorous linear perturbation theory around $f_0$. This is an indispensable prerequisite for the study of nonlinear stability of the self-similar blow up which is conducted in a companion paper. In particular, we prove that $f_0$ is linearly stable if it is mode stable. Furthermore, concerning the mode stability problem, we prove new results that exclude the existence of unstable eigenvalues with large imaginary parts and also, with real parts larger than 1/2. The remaining compact region is well-studied numerically and all available results strongly suggest the nonexistence of unstable modes.
description: 32 pages, 2 figures, acknowledgments added
Mass independence and asymmetry of the reaction: Multi-fragmentation as an example
Creators: name: Kaur, Varinderjit
name: Kumar, Suneel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present our recent results on the fragmentation by varying the mass asymmetry of the reaction between 0.2 and 0.7 at an incident energy of 250 MeV/nucleon. For the present study, the total mass of the system is kept constant (ATOT = 152) and mass asymmetry of the reaction is defined by the asymmetry parameter (? = | (AT - AP)/(AT + AP) |). The measured distributions are shown as a function of the total charge of all projectile fragments, Zbound. We see an interesting outcome for rise and fall in the production of intermediate mass fragments (IMFs) for large asymmetric colliding nuclei. This trend, however, is completely missing for large asymmetric nuclei. Therefore, experiments are needed to verify this prediction.
Model Spectra of the First Potentially Habitable Super-Earth - Gl581d
Creators: name: Kaltenegger, L.
name: Segura, A.
name: Mohanty, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Gl581d has a minimum mass of 7 MEarth and is the first detected potentially habitable rocky Super-Earth. Our models confirm that a habitable atmosphere can exist on Gl581d. We derive spectroscopic features for atmospheres, assuming an Earth-like composition for this planet, from high oxygen atmosphere analogous to Earth's to high CO2 atmospheres with and without biotic oxygen concentrations. We find that a minimum CO2 partial pressure of about 7 bar, in an atmosphere with a total surface pressure of 7.6 bar, are needed to maintain a mean surface temperature above freezing on Gl581d. We model transmission and emergent synthetic spectra from 0.4μm to 40μm and show where indicators of biological activities in such a planet's atmosphere could be observed by future ground- and space-based telescopes. The model we present here only represents one possible nature - an Earth-like composition - of a planet like Gl581d in a wide parameter space. Future observations of atmospheric features can be used to examine if our concept of habitability and its dependence on the carbonate-silicate cycle is correct, and assess whether Gl581d is indeed a habitable super-Earth.
description: 12 pages, 10 figures, ApJ, 732:1, 2011
The Polyakov Loop of Anti-symmetric Representations as a Quantum Impurity Model
Creators: name: Mueck, Wolfgang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Polyakov loop of an operator in the anti-symmetric representation in N=4 SYM theory on spacial R^3 is calculated, to leading order in 1/N and at large 't Hooft coupling, by solving the saddle point equations of the corresponding quantum impurity model. Agreement is found with previous results from the supergravity dual, which is given by a D5-brane in an asymptotically AdS_5 x S^5 black brane background. It is shown that the azimuth angle, at which the dual D5-brane wraps the S^5, is related to the spectral asymmetry angle in the spectral density associated with the Green's function of the impurity fermions. Much of the calculation also applies to the Polyakov loop on spacial S^3 or H^3.
description: 20 pages, 2 figures, v2: references added and small changes in text, v3: extended to Polyakov loops on spacial R^3, S^3 or H^3
QCD NLO predictions to $W$-pair production in association with a massive (anti)bottom-jet at the LHC
Creators: name: Han, Yan
name: Shao-Ming, Wang
name: Wen-Gan, Ma
name: Ren-You, Zhang
name: Lei, Guo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The $W$-pair production in association with a massive (anti)bottom jet is not only an important background to a number of interesting processes, such as the single top production associated with a W boson, but also a potential background to new physics searches. We present the calculations of the total and differential cross sections for the $W^+W^-+ b(\bar{b})$ jet productions at the LHC up to the QCD next-to-leading order (NLO). Our results by adopting the QCD NLO contribution collection scheme-I show that the K factors can be 1.66 and 1.21 with the inclusive and exclusive two-jet event selection schemes respectively, when we set $m_H=120 GeV$, $μ=m_W+m_b/2$ and take the constraints of $p_{T,b(\bar{b})}>25 GeV$, $|y_{b(\bar{b})}|<2.5$ for $b(\bar{b})$ jet. We find that the stabilization of the theoretical prediction for the integrated cross section for the $pp \to W^+W^-b(\bar b)+X$ up to the QCD NLO requires a veto on a second isolated hard jet and the inclusion of the QCD NLO contribution from the $W^+W^-b\bar{b}(bb, \bar{b}\bar{b})$ production with the final two $b(\bar{b})$ quarks being merged as one jet.
description: Published version in PRD
On the elliptical flow in asymmetric collisions and nuclear equation of state
Creators: name: Kaur, Varinderjit
name: Kumar, Suneel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We here present the results of elliptical flow for the collision of different asymmetric nuclei (10Ne20 +13 Al27, 18Ar40 +21 Sc45, 30Zn64 +28 Ni58, 36Kr86 +41 Nb93) by using the Quantum Molecular Dynamics (QMD) model. General features of elliptical flow are investigated with the help of theoretical simulations. The simulations are performed at different beam energies between 40 and 105 MeV/nucleon. A significant change can be seen from in-plane to out-of-plane elliptical flow of different fragments with incident energy. A comparison with experimental data is also made. Further, we predict, for the first time that, elliptical flow for different kind of fragments follow power law dependence ? C(Atot)? for asymmetric systems.
Dynamical conformal transformation and classical Euclidean wormholes
Creators: name: Darabi, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the necessary condition for the existence of classical Euclidean wormholes in a conformally non-invariant gravitational model minimally coupled to an scalar field. It is shown that while the original Ricci tensor with positive eigenvalues does not allow the Euclidean wormholes to occur, under dynamical conformal transformations the Ricci tensor, with respect to the original metric, is dynamically coupled with the conformal field and its eigenvalues may become negative allowing the Euclidean wormholes to occur. Therefore, it is conjectured that dynamical conformal transformations may provide us with {\it effective} forms of matter sources leading to Euclidean wormholes in conformally non-invariant systems.
description: 6 pages, minor revision
Application of computer vision techniques in safety diagnosis and evaluation of safety treatments
Creators: name: Reyad, Passant
Publisher: name: University of British Columbia
Year: 2017

description: Traditional road safety analysis is usually conducted using historical collision records. This reactive approach to road safety has been shown to have several shortcomings. Recently, there has been significant interest in using surrogate measures such as traffic conflicts to analyze safety. This interest has been strengthened by the availability of tools to automate the traffic conflict analysis from video data. Using automated computer vision techniques, road users can be tracked, classified, and their interactions determined accurately and reliably. This thesis demonstrates two applications of automated road safety analysis techniques using traffic conflicts. The first application is related to the diagnosis of road safety issues. A case study of safety at a school zone in Edmonton, Alberta is used. 240 video-hours of traffic data were recorded in two different seasons. The data was analyzed to evaluate the current safety performance of the school zone to identify factors that may be contributing to safety concerns and to propose potential safety improvements. The analysis included the automated analysis of traffic conflicts, violations, and traffic speed. Several recommendations were presented that would potentially improve the safety for all road users without affecting the mobility along the intersections. The second application included an evaluation of the safety effectiveness of improving the signal head visibility at two signalized intersections located in the City of Edmonton, Alberta, by conducting an automated before-and-after safety analysis using traffic conflicts. The use of automated conflict analysis in before/after safety evaluation can significantly reduce the time needed to reach conclusions about the effectiveness of safety countermeasures. More than 300 video-hours of traffic data were recorded at the two treated intersections before and after applying the treatment. In addition, traffic data was collected at two other intersections with similar characteristics to be used as comparison sites. A before/after road safety evaluation was performed using the Empirical Bayes method that accounts for the effects of the regression to the mean confounding factor. The methodology employs the use of a calibrated conflict-based safety performance function (SPF). The results showed a statistically-significant reduction (24.5%) in the average hourly conflict due to the improved signal heads.
Rotating Black Hole Thermodynamics with a Particle Probe
Creators: name: Gwak, Bogeun
name: Lee, Bum-Hoon
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The thermodynamics of Myers-Perry black holes in general dimensions are studied using a particle probe. When undergoing particle absorption, the changes of the entropy and irreducible mass are shown to be dependent on the particle radial momentum. The black hole thermodynamic behaviors are dependent on dimensionality for specific rotations. For a 4-dimensional Kerr black hole, its black hole properties are maintained for any particle absorption. 5-dimensional black holes can avoid a naked ring singularity by absorbing a particle in specific momenta ranges. Black holes over 6 dimensions become ultra-spinning black holes through a specific form of particle absorption. The microscopical changes are interpreted in limited cases of Myers-Perry black holes using Kerr/CFT correspondence. We systematically describe the black hole properties changed by particle absorption in all dimensions.
description: 14 pages
Noncommutative Schur polynomials and the crystal limit of the U_q sl(2)-vertex model
Creators: name: Korff, Christian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Starting from the Verma module of U_q sl(2) we consider the evaluation module for affine U_q sl(2) and discuss its crystal limit (q=0). There exists an associated integrable statistical mechanics model on a square lattice defined in terms of vertex configurations. Its transfer matrix is the generating function for noncommutative complete symmetric polynomials in the generators of the affine plactic algebra, an extension of the finite plactic algebra first discussed by Lascoux and Schützenberger. The corresponding noncommutative elementary symmetric polynomials were recently shown to be generated by the transfer matrix of the so-called phase model discussed by Bogoliubov, Izergin and Kitanine. Here we establish that both generating functions satisfy Baxter's TQ-equation in the crystal limit by tying them to special U_q sl(2) solutions of the Yang-Baxter equation. The TQ-equation amounts to the well-known Jacobi-Trudy formula leading naturally to the definition of noncommutative Schur polynomials. The latter can be employed to define a ring which has applications in conformal field theory and enumerative geometry: it is isomorphic to the fusion ring of the sl(n)_k -WZNW model whose structure constants are the dimensions of spaces of generalized theta-functions over the Riemann sphere with three punctures.
description: 24 pages, 6 figures; v2: several typos fixed
On the nuclear stopping in asymmetric colliding nuclei
Creators: name: Kaur, Varinderjit
name: Kumar, Suneel
name: Puri, Rajeev K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using an isospin-dependent quantum molecular dynamics (IQMD) model, nuclear stopping is analyzed in asymmetric colliding channels by keeping the total mass fixed. The calculations have been carried by varying the asymmetry of the colliding pairs with different neutron-proton ratios in center of mass energy 250 MeV/nucleon and by switching off the effect of Coulomb interactions. We find sizable effect of asymmetry of colliding pairs on the stopping and therefore on the equilibrium reached in a reaction.
Сроки посева сои - Sowing time for soybean
Creators: name: Rittler, Leopold
name: Bykova, Olga
Publisher: name: Zenodo
Year: 2022
Subjects: soybean
sowing
legumes

description: Своевременный посев важен для успешного производства сои. Своевременный посев даёт наилучшее сочетание сорта, продолжительности светового дня (широты и календарной даты), а также температуры и влажности почвы на глубине посадки. Это обеспечивает быстрое развитие и рост молодых растений до начала цветения, создавая основу для высокой урожайности. В этой Практической Заметке рассказывается о том, как определить оптимальную дату посева в каждой конкретной ситуации. Timely sowing is important for successful soybean production. Timely sowing gives the best combination of variety, day length (latitude and calendar date) and soil temperature and moisture at the planting depth. This ensures that the young plants develop and grow quickly before flowering, laying the foundation for high yields. This Practical Note explains how to determine the optimum sowing date for each situation.
Degenerate distributions in complex Langevin dynamics: one-dimensional QCD at finite chemical potential
Creators: name: Aarts, Gert
name: Splittorff, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We demonstrate analytically that complex Langevin dynamics can solve the sign problem in one-dimensional QCD in the thermodynamic limit. In particular, it is shown that the contributions from the complex and highly oscillating spectral density of the Dirac operator to the chiral condensate are taken into account correctly. We find an infinite number of classical fixed points of the Langevin flow in the thermodynamic limit. The correct solution originates from a continuum of degenerate distributions in the complexified space.
description: 20 pages, several eps figures, minor comments added, to appear in JHEP
Perturbation Theory of the Cosmological Log-Density Field
Creators: name: Wang, Xin
name: Neyrinck, Mark
name: Szapudi, István
name: Szalay, Alex
name: Chen, Xuelei
name: Lesgourgues, Julien
name: Riotto, Antonio
name: Sloth, Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The matter density field exhibits a nearly lognormal probability density distribution (PDF) after entering into the nonlinear regime. Recently, it has been shown that the shape of the power spectrum of a logarithmically transformed density field is very close to the linear density power spectrum, motivating an analytic study of it. In this paper, we develop cosmological perturbation theory for the power spectrum of this field. Our formalism is developed in the context of renormalized perturbation theory, which helps to regulate the convergence behavior of the perturbation series, and of the Taylor- series expansion we use of the logarithmic mapping. This approach allows us to handle the critical issue of density smoothing in a straightforward way. We also compare our perturbative results with simulation measurements.
description: Minor clarifications to match version accepted in ApJ. 15 pages, 10 figures
Phase Structure of Anisotropic Antiferromagnetic Heisenberg Model on Layered Triangular Lattice: Spiral State and Deconfined Spin Liquid
Creators: name: Nakane, Kazuya
name: Kamij, Takeshi
name: Ichinose, Ikuo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the present paper, we study spin-${1 \over 2}$ antiferromagnetic (AF) Heisenberg model on layered anisotropic triangular lattice and obtain its phase structure. We use the Schwinger bosons for representing spin operators and also coherent-state path integral for calculating physical quantities. Finite-temperature properties of the system are investigated by means of the numerical Monte-Carlo simulations. Detailed phase diagram of the system is obtained by calculating internal energy, specific heat, spin correlation functions, etc. There are AF Néel, paramagnetic and spiral states. Turning on plaquette term (i.e., the Maxwell term on a lattice) of an emergent U(1) gauge field that flips a pair of parallel spin-singlet bonds, we found that there appears a phase that is regarded as a deconfined spin-liquid state, though "transition" to this phase from the paramagnetic phase is not of second order but a crossover. In that phase, the emergent gauge boson is a physical gapless excitation coupled with spinons. These results support our previous study on AF Heisenberg model on a triangular lattice at vanishing temperature.
description: 21pages, 20figures
Cooling neutron star in the Cassiopeia~A supernova remnant: Evidence for superfluidity in the core
Creators: name: Shternin, Peter S.
name: Yakovlev, Dmitry G.
name: Heinke, Craig O.
name: Ho, Wynn C. G.
name: Patnaude, Daniel J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: According to recent results of Ho & Heinke (2009) and Heinke & Ho (2010), the Cassiopeia A supernova remnant contains a young neutron star which has carbon atmosphere and shows noticeable decline of the effective surface temperature. We report a new (November 2010) Chandra observation which confirms the previously reported decline rate. The decline is naturally explained if neutrons have recently become superfluid (in triplet-state) in the NS core, producing a splash of neutrino emission due to Cooper pair formation (CPF) process that currently accelerates the cooling. This scenario puts stringent constraints on poorly known properties of NS cores: on density dependence of the temperature $T_\mathrm{cn}(ρ)$ for the onset of neutron superfluidity [$T_\mathrm{cn}(ρ)$ should have a wide peak with maximum $\approx (7-9)\times 10^8$ K], on the reduction factor $q$ of CPF process by collective effects in superfluid matter ($q > 0.4$), and on the intensity of neutrino emission before the onset of neutron superfluidity (30--100 times weaker than the standard modified Urca process). This is serious evidence for nucleon superfluidity in NS cores that comes from observations of cooling NSs.
description: 6 pages, 3 figures, accepted for publication in MNRAS Letters
Calibrating spectral estimation for the LISA Technology Package with multichannel synthetic noise generation
Creators: name: Ferraioli, Luigi
name: Heinzel, Gerhard
name: Hewitson, Martin
name: Hueller, Mauro
name: Monsky, Anneke
name: Nofrarias, Miquel
name: Vitale, Stefano
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The scientific objectives of the Lisa Technology Package (LTP) experiment, on board of the LISA Pathfinder mission, demand for an accurate calibration and validation of the data analysis tools in advance of the mission launch. The levels of confidence required on the mission outcomes can be reached only with an intense activity on synthetically generated data. A flexible procedure allowing the generation of cross-correlated stationary noise time series was set-up. Multi-channel time series with the desired cross correlation behavior can be generated once a model for a multichannel cross-spectral matrix is provided. The core of the procedure is the synthesis of a noise coloring multichannel filter through a frequency-by-frequency eigendecomposition of the model cross-spectral matrix and a Z-domain fit. The common problem of initial transients in noise time series is solved with a proper initialization of the filter recursive equations. The noise generator performances were tested in a two dimensional case study of the LTP dynamics along the two principal channels of the sensing interferometer.
description: Accepted for publication in Physical Review D (http://prd.aps.org/)
Critical exponents from parallel plate geometries subject to periodic and antiperiodic boundary conditions
Creators: name: Silva, José B. da
name: Leite, Marcelo M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a renormalized 1PI vertex part scalar field theory setting in momentum space to computing the critical exponents $ν$ and $η$, at least at two-loop order, for a layered parallel plate geometry separated by a distance L, with periodic as well as antiperiodic boundary conditions on the plates. We utilize massive and massless fields in order to extract the exponents in independent ultraviolet and infrared scaling analysis, respectively, which are required in a complete description of the scaling regions for finite size systems. We prove that fixed points and other critical amounts either in the ultraviolet or in the infrared regime dependent on the plates boundary condition are a general feature of normalization conditions. We introduce a new description of typical crossover regimes occurring in finite size systems. Avoiding these crossovers, the three regions of finite size scaling present for each of these boundary conditions are shown to be indistinguishable in the results of the exponents in periodic and antiperiodic conditions, which coincide with those from the (bulk) infinite system.
description: Modified introduction and some references; new crossover regimes discussion improved; Appendixes expanded. 48 pages, no figures
Heat conduction: a telegraph-type model with self-similar behavior of solutions II
Creators: name: Barna, I. F.
name: Kersner, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In our former study (J. Phys. A: Math. Theor. 43, (2010) 325210 or arXiv:1002.0999v1 [math-ph]) we introduced a modified Fourier-Cattaneo law and derived a non-autonomous telegraph-type heat conduction equation which has desirable self-similar solution. Now we present a detailed in-depth analysis of this model and discuss additional analytic solutions for different parameters. The solutions have a very rich and interesting mathematical structure due to various special functions.
description: 12 pages, 10 figures 3 of them are colour, we plan to submit it to J. Phys. A: Math. Theor
Perioada de semănat pentru soia - Sowing time for soya
Creators: name: Rittler, Leopold
name: Bykova, Olga
Publisher: name: Zenodo
Year: 2022
Subjects: soybean
sowing
legumes

description: Semănatul la timpul oportun este important pentru reușita producției de soia. Semănatul în timp util asigură cea mai bună combinație dintre cultivar, durata luminii zilei (latitudine și dată calendaristică) și temperatura și umiditatea solului la adâncimea de plantare. Acest lucru permite dezvoltarea și creșterea rapidă a plan­telor tinere înainte de inducerea florală, oferind baza pentru un randament înalt. Această notă practică vizează modul de identificare a datei optime pentru semănat în fiecare situație. Timely sowing is important for successful soybean production. Timely sowing ensures the best combination of crop, daylight duration (latitude and calendar date) and soil temperature and humidity at the time of planting. This allows for rapid development and growth of the plants before flower induction, providing the basis for a high yield. This note is about how to identify the optimum sowing date in each situation.
Effective Gravitational Wave Stress-energy Tensor in Alternative Theories of Gravity
Creators: name: Stein, Leo C.
name: Yunes, Nicolas
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The inspiral of binary systems in vacuum is controlled by the stress-energy of gravitational radiation and any other propagating degrees of freedom. For gravitational waves, the dominant contribution is characterized by an effective stress-energy tensor at future null infinity. We employ perturbation theory and the short-wavelength approximation to compute this stress-energy tensor in a wide class of alternative theories. We find that this tensor is generally a modification of that first computed by Isaacson, where the corrections can dominate over the general relativistic term. In a wide class of theories, however, these corrections identically vanish at asymptotically flat, future, null infinity, reducing the stress-energy tensor to Isaacson's. We exemplify this phenomenon by first considering dynamical Chern-Simons modified gravity, which corrects the action via a scalar field and the contraction of the Riemann tensor and its dual. We then consider a wide class of theories with dynamical scalar fields coupled to higher-order curvature invariants, and show that the gravitational wave stress-energy tensor still reduces to Isaacson's. The calculations presented in this paper are crucial to perform systematic tests of such modified gravity theories through the orbital decay of binary pulsars or through gravitational wave observations.
description: 19 pages. v3: Clarified averaging properties and gauge choice. Version accepted to PRD
HAT-P-31b,c: A Transiting, Eccentric, Hot Jupiter and a Long-Period, Massive Third-Body
Creators: name: Kipping, David M.
name: Hartman, Joel
name: Bakos, Gáspár Á.
name: Torres, Guillermo
name: Latham, David W.
name: Bayliss, Daniel
name: Kiss, László L.
name: Sato, Bun'ei
name: Béky, Bence
name: Kovács, Géza
name: Quinn, Sam N.
name: Buchhave, Lars A.
name: Andersen, Jens
name: Marcy, Geoff W.
name: Howard, Andrew W.
name: Fischer, Debra A.
name: Johnson, John A.
name: Noyes, Robert W.
name: Sasselov, Dimitar D.
name: Stefanik, Robert P.
name: Lázár, József
name: Papp, István
name: Sári, Pál
name: Furesz, Gabor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of HAT-P-31b, a transiting exoplanet orbiting the V=11.660 dwarf star GSC 2099-00908. HAT-P-31b is the first HAT planet discovered without any follow-up photometry, demonstrating the feasibility of a new mode of operation for the HATNet project. The 2.17 Mj, 1.1Rj planet has a period P = 5.0054 days and maintains an unusually high eccentricity of e = 0.2450+/-0.0045, determined through Keck, FIES and Subaru high precision radial velocities. Detailed modeling of the radial velocities indicates an additional quadratic residual trend in the data detected to very high confidence. We interpret this trend as a long-period outer companion, HAT-P-31c, of minimum mass 3.4Mj and period >2.8 years. Since current RVs span less than half an orbital period, we are unable to determine the properties of HAT-P-31c to high confidence. However, dynamical simulations of two possible configurations show that orbital stability is to be expected. Further, if HAT-P-31c has non-zero eccentricity, our simulations show that the eccentricity of HAT-P-31b is actively driven by the presence of c, making HAT-P-31 a potentially intriguing dynamical laboratory.
description: 12 pages, 7 figures, 7 tables. Accepted in AJ. Minor changes over previous version
Searching for differences in Swift's intermediate GRBs
Creators: name: Postigo, A. de Ugarte
name: Horváth, I.
name: Veres, P.
name: Bagoly, Z.
name: Kann, D. A.
name: Thöne, C. C.
name: Balazs, L. G.
name: D'Avanzo, P.
name: Aloy, M. A.
name: Foley, S.
name: Campana, S.
name: Mao, J.
name: Jakobsson, P.
name: Covino, S.
name: Fynbo, J. P. U.
name: Gorosabel, J.
name: Castro-Tirado, A. J.
name: Amati, L.
name: Nardini, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray bursts are usually classified through their high-energy emission into short-duration and long-duration bursts, which presumably reflect two different types of progenitors. However, it has been shown on statistical grounds that a third, intermediate population is needed in this classification scheme, although an extensive study of the properties of this class has so far not been done. The large amount of follow-up studies generated during the Swift era allows us to have a suficient sample to attempt a study of this third population through the properties of their prompt emission and their afterglows. Our study is focused on a sample of GRBs observed by Swift during its first four years of operation. The sample contains those bursts with measured redshift since this allows us to derive intrinsic properties. Intermediate bursts are less energetic and have dimmer afterglows than long GRBs, especially when considering the X-ray light curves, which are on average one order of magnitude fainter than long bursts. There is a less significant trend in the redshift distribution that places intermediate bursts closer than long bursts. Except for this, intermediate bursts show similar properties to long bursts. In particular, they follow the Epeak vs. Eiso correlation and have, on average, positive spectral lags with a distribution similar to that of long bursts. Like long GRBs, they normally have an associated supernova, although some intermediate bursts have shown no supernova component. This study shows that intermediate bursts are different from short bursts and, in spite of sharing many properties with long bursts, there are some differences between them as well. We suggest that the physical difference between intermediate and long bursts could be that for the first the ejecta are thin shells while for the latter they are thick shells.
description: Accepted for publication in Astronomy and Astrophysics. 16 pages, 17 figures, 5 tables
Supplementary Material for Vision Paper "Quo Vadis, Explainability? ‒ A Research Roadmap for Explainability Engineering"
Creators: name: Brunotte, Wasja
name: Chazette, Larissa
name: Klös, Verena
name: Speith, Timo
Publisher: name: Zenodo
Year: 2022
Subjects: Explainability
Explainable Artificial Intelligence
Interpretability
Research Roadmap
Software Engineering
Requirements Engineering
Software Transparency

description: This is the supplementary material for the research paper "Quo Vadis, Explainability? ‒ A Research Roadmap for Explainability Engineering" accepted at the 28th International Working Conference on Requirement Engineering: Foundation for Software Quality.
Dall’archivio fisico all’archivio digitale: l’esperienza di A.N.G.E.L.O. Vintage Palace narrata dal suo fondatore Angelo Caroli
Creators: name: Marfia, Gustavo
Publisher: name: ZoneModa Journal
Year: 2020

description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
Spin-Dynamik in Atomen und Clustern auf Oberflächen
Creators: name: Schuh, Tobias
Publisher: name: Karlsruhe
Year: 2012

description: In dieser Arbeit wurden die magnetischen Eigenschaften einzelner Seltener Erde Atome (Ho, Gd) und kleiner  Gd-Cluster auf Oberflächen mit einem Rastertunnelmikroskop gemessen. Zudem wurden die magnetischen Grundzustände von antiferromagnetischen Mn-Ketten auf Ni(110) bestimmt.
Long-term follow-up of children with idiopathic toe walking
Creators: name: Davies, Karen Rachel
Publisher: name: University of British Columbia
Year: 2017

description: Introduction: Toe walking may develop with early ambulation, but is considered abnormal in healthy children after three years of age. Idiopathic toe walking is a diagnosis of exclusion characterized by forefoot weight bearing and lack of heel contact with the floor. This condition may be associated with pain in the legs or feet, frequent tripping or falling, and ankle injuries. In British Columbia, treatment for toe walking varies from physiotherapy, casts or braces, Botulinum toxin A injections into calf muscles, and/or surgery. Little evidence exists regarding long-term treatment effects. Objectives: To determine the natural history of idiopathic toe walking and the long-term impact of treatment on gait outcomes and severity of toe walking. Potential activity limitations and participation restrictions were also explored. Methods: Gait analysis data and severity of toe walking were compared from baseline to follow-up in 44 adolescents and young adults diagnosed with idiopathic toe walking between 1997 and 2005 in a non-experimental retrospective cohort study. Participants were grouped as receiving no treatment other than stretching exercises (n=20) or treatment (n=24), including casting +/- Botulinum toxin A injections (n=23) or tendo-Achilles lengthening (n=1). Levels of activity and participation were assessed using the Pediatric Outcomes Data Collection Instrument for adolescents and the Medical Outcomes Study 36-Item Short Form Survey Instrument for young adults. Results: Ankle kinematics improved in the treatment group only whereas improved ankle kinetics and compensatory knee hyperextension were observed in both groups. Ankle moments remained atypical in 89% of the participants at follow-up. Clinical ankle dorsiflexion decreased over time in both groups. Statistically significant differences in severity at follow-up were found only in the treatment group (p<0.001). Adolescents and young adults scored 54% and 68%, respectively, above the general population mean in global functioning and physical capacity by self-report. Conclusions: The natural history of idiopathic toe walking indicates improved timing of ankle kinematics and improved ankle kinetics. Participants treated for toe walking as children demonstrated significant changes in kinematics, kinetics, and severity at follow-up. Despite perseverance in gait changes in both groups at follow-up, self-report questionnaires suggest there is minimal impact on activity and participation.
A=3 Clustering in Nuclei
Creators: name: Abbas, Syed Afsar
name: Ahmad, Shakeb
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Alpha clustering in nuclei, at present is a well studied and reasonably well accepted property of the nucleus. Less well appreciated and more ambiguous is the role of A=3 clustering, i.e. helion and triton, in nuclei. Here we try to place A=3 clustering in nuclei into its proper perspective, first by pointing out strong experimental evidences which indicate its clear presence in nuclei and secondly showing as to how to include these A=3 clusters in a proper and consistent theoretical understanding of the nuclear phenomenon.
description: 10 pages, 2 figures
Distributed Simulations for 3D Ultrasound Computer Tomography
Creators: name: Hardt, Marcus
Publisher: name: Karlsruhe
Year: 2012
Subjects: subject: Distributed Computing
subject: FOS: Computer and information sciences
subject: Medical imaging
subject: Pressure waves
subject: Matlab

description: More than 10% of all women in the western world get breast cancer. The Ultrasound Computer Tomography (USCT) project aims to provide a screening method which can detect cancer tumours at 5mm.
Color transparency and suppression of high-pT hadrons in nuclear collisions
Creators: name: Kopeliovich, B. Z.
name: Potashnikova, I. K.
name: Schmidt, Ivan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The production length l_p of a leading (large z_h) hadron produced in hadronization of a highly virtual high-p_T parton is short because of the very intensive vacuum gluon radiation and dissipation of energy at the early stage of process. Therefore, the main part of nuclear suppression of high-p_T hadrons produced in heavy ion collisions is related to the survival probability of a colorless dipole propagating through a dense medium. This is subject to color transparency, which leads to a steep rise with p_T of the nuclear ratio R_{AA}(p_T), in good agreement with the recent data from the ALICE experiment at LHC, CERN. No adjustment, except the medium density is made, and the transport coefficient is found to be \hat q_0=0.8 GeV^2/fm. This is close to the value extracted from the analysis of RHIC data for J/Psi suppression, but is an order of magnitude smaller than the value found from jet quenching data within the energy loss scenario. Although the present calculations have a status of a postdiction, the mechanism and all formulas have been published, and are applied here with no modification, except the kinematics. At the same time, p_T-dependence of R_{AA} at the energy of RHIC is rather flat due to the suppression factor steeply falling with rising x_T, related to the energy conservation constraints. This factor is irrelevant to the LHC data, since x_T is much smaller.
description: 5 pages, 3 figures, the version to appear in Phys. Rev. C
Critical current diffraction pattern of SIFS Josephson junctions with step-like F-layer
Creators: name: Weides, M.
name: Peralagu, U.
name: Kohlstedt, H.
name: Pfeiffer, J.
name: Kemmler, M.
name: Gürlich, C.
name: Goldobin, E.
name: Koelle, D.
name: Kleiner, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present the latest generation of superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions with a step-like thickness of the ferromagnetic (F) layer. The F-layer thicknesses $d_1$ and $d_2$ in both halves were varied to obtain different combinations of positive and negative critical current densities $j_{c,1}$ and $j_{c,2}$. The measured dependences of the critical current on applied magnetic field can be well described by a model which takes into account different critical current densities (obtained from reference junctions) and different net magnetization of the multidomain ferromagnetic layer in both halves.
description: 7 pages, 3 figures
La memoria ‘estesa’ della moda. Come valorizzare l’heritage aziendale con la tecnologia
Creators: name: Pompa, Chiara
Publisher: name: ZoneModa Journal
Year: 2020

description: Nei mesi di lockdown e distanziamento sociale, necessari per contrastare il diffondersi dei contagi da COVID-19, sul web hanno preso piede lodevoli iniziative di condivisione gratuita della cultura, cui ha contribuito anche il mondo della moda, aprendo al grande pubblico i propri database digitali. Una strategia comunicativa in grado di stimolare una riflessione sulla dimensione dell’accessibilità ai patrimoni archivistici della moda, oltre che sugli usi che di tali patrimoni è possibile fare. Il fenomeno è infatti osservabile da molteplici punti di vista: se da un lato è in grado di restituire uno spaccato sull’avanzamento della digitalizzazione, dall’altro mette in luce l’esiguo impiego della realtà aumentata e virtuale negli archivi e nei musei d’impresa del settore, tecnologie attualmente adottate anzitutto nell’ambito retail sia B2B sia B2C. Partendo dall’analisi dello stato dell’arte, il contributo intende delineare i contorni di uno scenario che lasci intravedere i percorsi potenziali di una ricerca orientata allo sviluppo di soluzioni tecnologiche di realtà estesa in grado di supportare i processi di fruizione e valorizzazione dell’heritage aziendale.
description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
Sofia Gnoli, Moda. Dalla nascita della haute couture a oggi, Nuova edizione, Roma, Carocci, 2020
Creators: name: Baroncini, Daniela
Publisher: name: ZoneModa Journal
Year: 2020

description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
Digital Humanities e moda
Creators: name: Rossi, Valentina
Publisher: name: ZoneModa Journal
Year: 2020

description: To answer the question posed by the call: Could the pandemic, the pervasive use of the Web and the experimentation of Extended Reality technologies give a boost to fashion archives? it is necessary to undertake a analysis of different case studies that over the years have been confronted with Digital Humanities practices.The essay aims to outline a methodological lecture on museum and archival practices related to digital humanities. Since March 2020, museums and archives have accelerated the data restitution process and reinterpreted the functions of institutions through digital practices and virtual exhibitions - that do not aspire to replace the real ones - and demonstrating how these are placed on a different level of reading. They can certainly integrate with the museum and physical itinerary, but they can also take place independently of it. The debate on Digital Humanities and Virtual Exhibitions is now wide and articulated and one of its major authors, Jeffrey Schnapp, writes of Knowledge design: we find ourselves creating new forms of knowledge assuming the current conditions that contemporaneity offers us, while other critical perspectives are aimed at restoring the difference on the role of the document as such or on the method of construction and the impact of digital platforms
description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
Towards Sustainable Fashion: The Role of Artificial Intelligence --- H&M, Stella McCartney, Farfetch, Moosejaw: A Multiple Case Study
Creators: name: Candeloro, Daniela
Publisher: name: ZoneModa Journal
Year: 2020

description: Throughout history, technology has undoubtedly changed many aspects of humanity, and more recently, artificial intelligence has certainly created a significant impact on people, industry and planet. Parallelly, there is another factor which affects Earth and people lives: the harmful footprint that is generated within the whole fashion system. From production to consumption, fashion creates a vicious cycle where unsustainable behaviours are repeatedly practised. On the other hand, an increasing concern is rising about these kinds of damaging approaches, demanding for a more sustainable fashion system. In this scenario, could artificial intelligence have a role in building a sustainable fashion system? This essay tries to answer this question examining how artificial intelligence can be implemented to gain sustainable solutions within the fashion production and consumption. More specifically, the research is developed through the multiple case study methodology.For this reason, four fashion brand cases are analysed in order to underline the sustainable benefits gained from each strategy: H&M, Stella McCartney, Farfetch, Moosejaw.
description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
Super-Chandrasekhar SNe Ia Strongly Prefer Metal-Poor Environments
Creators: name: Khan, Rubab
name: Stanek, K. Z.
name: Stoll, R.
name: Prieto, J. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We discuss the emerging trend that super-Chandrasekhar Type Ia Supernovae (SCSNe) with progenitor mass estimates significantly exceeding 1.4 M_sun tend to explode in metal-poor environments. While Taubenberger et al. 2011 noted that some of the SCSNe host galaxies are relatively metal-poor, we focus quantitatively on their locations in the hosts to point out that in three out of four cases, the SCSNe explosions occurred in the outer edge of the disks of their hosts. It is therefore very likely that their progenitors had far lower metallicities than those implied by the metallicity of their hosts' central regions. In two cases (SN 2003fg and SN 2009dc) the explosion sites were outside 99% of the host's light, and in one case (SN 2006gz) the host's radial metallicity slope indicates that the explosion site is in a metal-poor region. The fourth case (SN 2007if) has the lowest spectroscopically measured SN Ia host metallicity (Childress et al. 2011. It may be possible to explain each of these unusually bright events through some progenitor scenario specific to that case, but a much simpler and straightforward conclusion would be to ascribe the controlling factor to the only physical aspect they have in common --- metal poor environments.
description: 13 pages, 4 figures, 1 table. Accepted for publication in ApJ Letters
Adam Geczy and Vicki Karaminas, Libertine Fashion: Sexual Freedom, Rebellion, and Style, Bloomsbury, 2020
Creators: name: Brajato, Nicola
Publisher: name: ZoneModa Journal
Year: 2020

description: ZoneModa Journal, V. 10 N. 2 (2020): Moda, Tecnologia e Distanziamento Sociale
title: Ceram_K_7
Creators: name: Yasmine Saidi
name: Trajectoires UMR 8215
Publisher: name: Archeovision
Year: 2022
Subjects: subject: poterie
subject: Kabyle

description: Institut d'art et archéologie, 3 rue Michelet 75006
description: 1 fichier 3D (ply), 1 fichier image (jpg)