cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extended two-body problem for rotating rigid bodies
Creators: name: Ho, Alex
name: Wold, Margrethe
name: Conway, John T.
name: Poursina, Mohammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A new technique that utilizes surface integrals to find the force, torque and potential energy between two non-spherical, rigid bodies is presented. The method is relatively fast, and allows us to solve the full rigid two-body problem for pairs of spheroids and ellipsoids with 12 degrees of freedom. We demonstrate the method with two dimensionless test scenarios, one where tumbling motion develops, and one where the motion of the bodies resemble spinning tops. We also test the method on the asteroid binary (66391) 1999 KW4, where both components are modelled either as spheroids or ellipsoids. The two different shape models have negligible effects on the eccentricity and semi-major axis, but have a larger impact on the angular velocity along the $z$-direction. In all cases, energy and total angular momentum is conserved, and the simulation accuracy is kept at the machine accuracy level.
description: 24 pages, 9 figures, accepted for publication in Celestial Mechanics and Dynamical Astronomy
Patrick Henßler und Josef Schmid, Bevölkerungswissenschaft im Werden. Die geistigen Grundlagen der deutschen Bevölkerungssoziologie, Wiesbaden: VS Verlag für Sozialwissenschaften 2007, 300 S.
Creators: name: Exner, Gudrun
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2008

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 19 Nr. 1 (2008): Historische Migrationsforschung
title: Ð¤ÑÐ½Ð´Ð°Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ Ð¸ Ð¿ÑÐ¸ÐºÐ»Ð°Ð´Ð½ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ, ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð¸ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸. Ð§. 5
title: ÑÐ±Ð¾ÑÐ½Ð¸Ðº ÑÑÑÐ´Ð¾Ð² ÐÑÐµÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¸ ÑÑÐµÐ±Ð½Ð¾-Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ð¸
titleType: Subtitle
Creators: name: "Ð¤ÑÐ½Ð´Ð°Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ Ð¸ Ð¿ÑÐ¸ÐºÐ»Ð°Ð´Ð½ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ, ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð¸ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸", Ð²ÑÐµÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ°Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ°Ñ Ð¸ ÑÑÐµÐ±Ð½Ð¾-Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ (2024; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: Ð½Ð°ÑÑÐ½ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ
ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ°
Ð¼ÐµÐ½ÐµÐ´Ð¶Ð¼ÐµÐ½Ñ
ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ñ

description: Ð ÑÐ±Ð¾ÑÐ½Ð¸ÐºÐµ Ð¿ÑÐ±Ð»Ð¸ÐºÑÑÑÑÑ ÑÑÐ°ÑÑÐ¸ Ð¿Ð¾ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð°Ð¼ Ð´Ð¾ÐºÐ»Ð°Ð´Ð¾Ð², Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð½ÑÑ Ð½Ð° ÑÐµÐºÑÐ¸Ð¾Ð½Ð½ÑÑ Ð·Ð°ÑÐµÐ´Ð°Ð½Ð¸ÑÑ ÐÑÐµÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¸ ÑÑÐµÐ±Ð½Ð¾-Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ð¸ Â«Ð¤ÑÐ½Ð´Ð°Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ Ð¸ Ð¿ÑÐ¸ÐºÐ»Ð°Ð´Ð½ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ, ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð¸ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸Â». Ð¡ÑÐ°ÑÑÐ¸ Ð¾ÑÑÐ°Ð¶Ð°ÑÑ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÐ¹ ÑÑÐ¾Ð²ÐµÐ½Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð¹ Ð¸ Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÑÐ°ÑÑÐ½Ð¸ÐºÐ¾Ð² ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ð¸ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸, Ð¼ÐµÐ½ÐµÐ´Ð¶Ð¼ÐµÐ½ÑÐ° Ð¸ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸, ÑÐµÑÑÑÑÐºÑÑÑÐ¸Ð·Ð°ÑÐ¸Ð¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð² ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ ÑÑÐ»Ð¾Ð²Ð¸ÑÑ Ð½Ð° Ð¼Ð¸ÐºÑÐ¾- Ð¸ Ð¼Ð°ÐºÑÐ¾ÑÑÐ¾Ð²Ð½ÑÑ, ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¹ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð±Ð¸Ð·Ð½ÐµÑÐ¾Ð¼, Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿Ð¾ÐºÐ°Ð·ÑÐ²Ð°ÑÑ Ð¸Ð½Ð½Ð¾Ð²Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ Ð¿Ð¾Ð´ÑÐ¾Ð´Ñ Ð² Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐµ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð² Ð²ÑÑÑÐµÐ³Ð¾ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ ÑÑÐ»Ð¾Ð²Ð¸ÑÑ.
Fundamental classes not representable by products
Creators: name: Kotschick, D.
name: Loeh, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 53C23 (Primary); 20F34, 20F67, 57N65 (Secondary)

description: We prove that rationally essential manifolds with suitably large fundamental groups do not admit any maps of non-zero degree from products of closed manifolds of positive dimension. Particular examples include all manifolds of non-positive sectional curvature of rank one and all irreducible locally symmetric spaces of non-compact type. For closed manifolds from certain classes, say non-positively curved ones, or certain surface bundles over surfaces, we show that they do admit maps of non-zero degree from non-trivial products if and only if they are virtually diffeomorphic to products.
description: 22 pages; updated references and corrected a typo; to appear in the Journal of the London Mathematical Society
The Dustiest Galactic S Stars: Mid-Infrared Spectra from SOFIA/FORCAST
Creators: name: Kraemer, Kathleen E.
name: Sloan, G. C.
name: Ramirez, Ramses M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present spectra of 12 of the reddest, and hence dustiest, S stars in the Milky Way, observed with the FORCAST grisms on SOFIA. S stars are asymptotic giant branch (AGB) stars with C/O$\sim$1, so their molecular and dust chemistries are dominated by neither O nor C, often leading to atypical spectral features from their molecules and dust grains. All of the stars in our sample have strong dust emission features at 10--11 $μ$m, but the shape of the feature in most of the stars differs from the shapes commonly observed in either oxygen-rich or carbon-rich AGB stars. Two stars also show the 13 $μ$m feature associated with crystalline alumina. Two have a water absorption band at $\sim$6.5--7.5 $μ$m, and a third has a tentative detection, but only one of these three has the more common SiO absorption band at 7.5 $μ$m. Three others show a red 6.3 $μ$m emission feature from complex hydrocarbons consistent with ``Class C'' objects, and in a fourth it appears at 6.37 $μ$m, redder than even the standard Class C hydrocarbon feature. Class C spectra typically indicate complex hydrocarbons which have been less processed by UV radiation, resulting in more aliphatic bonds relative to aromatic bonds. None of the S stars shows a strong 11.3 $μ$m hydrocarbon feature, which is also consistent with the presence of aliphatic hydrocarbons.
Large curvature perturbations near horizon crossing in single-field inflation models
Creators: name: Bugaev, Edgar
name: Klimai, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the examples of single-field inflation models predicting large amplitudes of the curvature perturbation power spectrum at relatively small scales. It is shown that in models with an inflationary potential of double-well type the peaks in the power spectrum, having, in maximum, the amplitude ~0.1, can exist (if parameters of the potential are chosen appropriately). It is shown also that the spectrum amplitude of the same magnitude (at large k values) is predicted in the model with the running mass potential, if the positive running, n', exists and is about 0.005 at cosmological scales. Estimates of the quantum diffusion effects during inflation in models with the running mass potential are given.
description: 10 pages, 12 figures. In v3, minor modifications were made to match version accepted by Phys. Rev. D: length of the introduction reduced, several references added
Nearby SN-Associated GRB~190829A: Environment, Jet Structure, and VHE Gamma-Ray Afterglows
Creators: name: Lu-Lu, Zhang
name: Jia, Ren
name: Xiao-Li, Huang
name: Yun-Feng, Liang
name: Da-Bin, Lin
name: En-Wei, Liang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a self-consistent paradigm for interpreting the striking features of nearby low-luminosity GRB~190829A. Its prompt gamma-ray lightcurve has two separated pulses. We propose that the interaction of the hard prompt gamma-ray photons ($E_p= 624_{-303}^{+2432}$ keV) of its initial pulse with the dusty medium ($A_{\rm V}=2.33$) does not only result in the second soft gamma-ray pulse ($E_p\sim 12$ keV), but also makes a pre-accelerated $e^{\pm}$-rich medium shell via the $γγ$ annihilation.In this paradigm, we show that the observed radio, optical, and X-ray afterglow lightcurves are well fit with the forward shock model. Its jet is almost isotropic ($θ_j>1.0$ rad) with a Lorentz factor of $\sim 35$, and the electron density of the $e^{\pm}$-rich medium shell is $\sim 15$ cm$^{-3}$, about 7~times higher than the electron density of its normal surrounding medium. The GRB ejecta catches up with and propagates into the $e^{\pm}$-rich medium shell at a region of $R=(4.07-6.46)\times 10^{16}~\rm cm$, resulting in a bright afterglow bump at $\sim 10^3$ seconds post the GRB trigger. The predicted very high energy (VHE) gamma-ray emission from the synchrotron self-Compton process agrees with the H.E.S.S. observation. The derived broadband spectral energy distribution shows that GRB~190829A like nearby GRBs would be promising targets of the VHE gamma-ray telescopes, such as H.E.S.S., MAGIC, and CTA (Cherenkov Telescope Arrays).
description: 14 pages, 4 figures, 1 tables; the original version was submitted to ApJ on Feb. 20, 2021 and currently is under review. The H.E.S.S. data published in Science 372, 1081 (2021) are added in the current posted version
Emergent self-organized complex network topology out of stability constraints
Creators: name: Perotti, J. I.
name: Billoni, O. V.
name: Tamarit, F. A.
name: Chialvo, D. R.
name: Cannas, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Although most networks in nature exhibit complex topology the origins of such complexity remains unclear. We introduce a model of a growing network of interacting agents in which each new agent's membership to the network is determined by the agent's effect on the network's global stability. It is shown that out of this stability constraint, scale free networks emerges in a self organized manner, offering an explanation for the ubiquity of complex topological properties observed in biological networks.
description: 4 pages, 4 figures
COVID-19 Working Paper: Changes in Regional Hog Slaughter During COVID-19
Creators: name: Padilla, Samantha
name: Schulz, Lee L
name: Vaiknoras, Kate
name: MacLachlan, Matthew
name: Padilla, Samantha
name: Schulz, Lee L
name: Vaiknoras, Kate
name: MacLachlan, Matthew
Publisher: name: Unknown
Year: 2021
Subjects: subject: Productivity Analysis
subject: Pork
subject: pork processing
subject: hogs
subject: hog slaughter

description: This working paper explores how the Coronavirus (COVID-19) pandemic affected U.S. pork processing plants, including measuring changes to regional slaughter in 2020.
title: Sustainability Transformation Monitor 2025
Creators: name: Reppmann, Manuel
name: Kunzlmann, Jakob
name: Putzhammer, Fritz
name: Edinger Schons, Laura-Marie
Publisher: name: Bertelsmann Stiftung
publisherIdentifier: https://ror.org/01wj9hk44
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Nachhaltigkeit
Unternehmen
Wirtschaft
Nachhaltigkeitstransformation

description: Ziel des Sustainability Transformation Monitor (STM) ist es, die Nachhaltigkeitstransformation der Wirtschaft evidenzbasiert abzubilden und den Status-Quo und die Treiber und Hemmnisse zu erheben. Ein besonderer Fokus liegt dabei auf dem effektiven Zusammenwirken von Real- und Finanzwirtschaft in der Transformation hin zu nachhaltigeren und damit widerstandsfähigeren Wirtschaftsstrukturen.
Hydrodynamic Processes in Massive Stars
Creators: name: Meakin, Casey A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The hydrodynamic processes operating within stellar interiors are far richer than represented by the best stellar evolution model available. Although it is now widely understood, through astrophysical simulation and relevant terrestrial experiment, that many of the basic assumptions which underlie our treatments of stellar evolution are flawed, we lack a suitable, comprehensive replacement. This is due to a deficiency in our fundamental understanding of the transport and mixing properties of a turbulent, reactive, magnetized plasma; a deficiency in knowledge which stems from the richness and variety of solutions which characterize the inherently non-linear set of governing equations. The exponential increase in availability of computing resources, however, is ushering in a new era of understanding complex hydrodynamic flows; and although this field is still in its formative stages, the sophistication already achieved is leading to a dramatic paradigm shift in how we model astrophysical fluid dynamics. We highlight here some recent results from a series of multi-dimensional stellar interior calculations which are part of a program designed to improve our one-dimensional treatment of massive star evolution and stellar evolution in general.
description: 10 pages, 4 figures, IAUS 252 Conference Proceeding (Sanya) - "The Art of Modeling Stars in the 21st Century"
Pair formation and collapse in imbalanced Fermion populations with unequal masses
Creators: name: Batrouni, G. G.
name: Wolak, M. J.
name: Hebert, F.
name: Rousseau, V. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present an exact Quantum Monte Carlo study of the effect of unequal masses on pair formation in Fermionic systems with population imbalance loaded into optical lattices. We have considered three forms of the attractive interaction and find in all cases that the system is unstable and collapses as the mass difference increases and that the ground state becomes an inhomogeneous collapsed state. We also address the question of canonical vs grand canonical ensemble and its role, if any, in stabilizing certain phases.
TOI-216: Resonant Constraints on Planet Migration
Creators: name: Nesvorny, David
name: Chrenko, Ondrej
name: Flock, Mario
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: TOI-216 is a pair of close-in planets with orbits deep in the 2:1 mean motion resonance. The inner, Neptune-class planet (TOI-216b) is near 0.12 au (orbital period $P_{\rm b} \simeq 17$ d) and has a substantial orbital eccentricity ($e_{\rm b} \simeq 0.16$), and large libration amplitude ($A_ψ\simeq 60^\circ$) in the resonance. The outer planet (TOI-216c) is a gas giant on a nearly circular orbit. We carry out $N$-body simulations of planet migration in a protoplanetary gas disk to explain the orbital configuration of TOI-216 planets. We find that TOI-216b's migration must have been halted near its current orbital radius to allow for a convergent migration of the two planets into the resonance. For the inferred damping-to-migration timescale ratio $τ_e/τ_a \simeq 0.02$, overstable librations in the resonance lead to a limit cycle with $A_ψ\simeq 80^\circ$ and $e_{\rm b}<0.1$. The system could have remained in this configuration for the greater part of the protoplanetary disk lifetime. If the gas disk was removed from inside out, this would have reduced the libration amplitude to $A_ψ\simeq 60^\circ$ and boosted $e_{\rm b}$ via the resonant interaction with TOI-216c. Our results suggest a relatively fast inner disk removal ($\sim 10^5$ yr). Another means of explaining the large libration amplitude is stochastic stirring from a (turbulent) gas disk. For that to work, overstable librations would need to be suppressed, $τ_e/τ_a \simeq 0.05$, and very strong turbulent stirring (or some other source of large stochastic forcing) would need to overcome the damping effects of gas. Hydrodynamical simulations can be performed to test these models.
description: ApJ
The Blast Wave Model for AGN Feedback: Effects on AGN Obscuration
Creators: name: Menci, N.
name: Fiore, F.
name: Puccetti, S.
name: Cavaliere, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compute the effect of the galactic absorption on AGN emission in a cosmological context by including a physical model for AGN feeding and feedback in a semi-analytic model of galaxy formation. This is based on galaxy interactions as triggers for AGN accretion, and on expanding blast waves as a mechanism to propagate outwards the AGN energy injected into the interstellar medium at the center of galaxies. We first test our model against the observed number density of AGNs with different intrinsic luminosity as a function of redshift. The model yields a ''downsizing'' behavior in close agreement with the observed one for z<2. At higher redshifts, the model predicts an overall abundance of AGNs (including Compton-thick sources) larger than the observed Compton-thin sources by a factor around 2 for z>2 and L_X < 10^{44} erg/s. Thus, we expect that at such luminosities and redshifts about 1/2 of the total AGN population is contributed by Compton-thick sources. We then investigate the dependence of the absorbing column density N_H associated to cold galactic gas (and responsible for the Compton-thin component of the overall obscuration) on the AGN luminosity and redshift. We find that the absorbed fraction of AGNs with N_H>10^{22} cm^{-2} decreases with luminosity for z<1; in addition, the total (integrated over luminosity) absorbed fraction increases with redshift up to z around 2, and saturates to the value around 0.8 at higher redshifts. Finally, we predict the luminosity dependence of the absorbed fraction of AGNs with L_X< 3 10^{44} erg/s to weaken with increasing redshift. We compare our results with recent observations, and discuss their implications in the context of cosmological models of galaxy formation.
description: 13 pages, accepted for publication in Astrophysical Journal; added 2 references
Quantification Platform for Touch Response of Zebrafish Larvae using Machine Learning
Creators: name: Wang, Yanke
name: Pylatiuk, Christian
name: Mikut, Ralf
name: Peravali, Ravindra
name: Reischl, Markus
Publisher: name: KIT Scientific Publishing
Year: 2021

description: A touch-evoked response of zebrafish larvae provides information of the mechanism of the gene functional expressions. Recently, an automated system has been developed for precise and repeated touch-response experimentation with minor human intervention. The data collected by the system are analyzed with regard to an automated quantification pipeline for scientific conclusions, including five quantification criteria: latency time, C-Bend curvature maximum, C-Bend peak time, response time, and moving distance. To quantify these criteria, we propose a larva tracking based automatic quantification pipeline by using a U-Net for initialization of tracking, a particle filter as tracking strategy, and region growing for the segmentation of larvae. Experimental data with different treatments are analyzed by using the proposed quantification platform for demonstration, and the result proves that this platform can generate comparable touch-response behavior quantification readouts in an efficient and automatic way. This platform provides an alternative to automatically screening the drugs for knowledge discovery according to the pattern of the touch-response behaviors of zebrafish larvae mutated by chemicals.
Thermoelectric transport in billiard systems
Creators: name: Casati, Giulio
name: Mejia-Monasterio, Carlos
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss the thermoelectric (TE) transport in billiard systems of interacting particles, coupled to stochastic particle reservoirs. Recently in [1], analytical exact expressions for the TE transport of noninteracting gases of polyatomic molecules were obtained, and a novel microscopic mechanism for the increase of thermoelectric efficiency described. After briefly reviewing the derivation of [1], in this paper we focus on the effects that the particle-particle interaction has on the TE efficiency. We show that interaction reduces the maximal thermodynamic efficiency. However, the mechanism for the efficiency's increase towards its Carnot upper limit, described in [1], remains unaffected.
description: Proceedings of the 7th International Summer School "Let's Face Chaos Through Nonlinear Dynamics". 11 pages, 4 figures
Optimal strategies of radial velocity observations in planet search surveys
Creators: name: Baluev, Roman V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Applications of the theory of optimal design of experiments to radial velocity planet search surveys are considered. Different optimality criteria are discussed, basing on the Fisher, Shannon, and Kullback-Leibler informations. Algorithms of optimal scheduling of RV observations for two important practical problems are considered. The first problem is finding the time for future observations to yield the maximum improvement of the precision of exoplanetary orbital parameters and masses. The second problem is finding the most favourable time for distinguishing alternative orbital fits (the scheduling of discriminating observations). These methods of optimal planning are demonstrated to be potentially efficient for multi-planet extrasolar systems, in particular for resonant ones. In these cases, the optimal dates of observations are often concentrated in quite narrow time segments.
description: 8 pages, 2 figures, no tables, Accepted to MNRAS
COVID-19 Working Paper: The COVID-19 Pandemic and Food Security in Low- and Middle-Income Countries: A Review of the Emerging Microeconomic Literature
Creators: name: Bloem, Jeffrey
name: Farris, Jarrad
name: Bloem, Jeffrey
name: Farris, Jarrad
Publisher: name: Unknown
Year: 2021
Subjects: subject: Food Security and Poverty
subject: COVID-19
subject: Coronavirus pandemic
subject: food security
subject: income shocks

description: This paper reviews preliminary findings from the emerging microeconomic literature on observed changes in food insecurity associated with the COVID-19 pandemic. The review complements existing macroeconomic projections of food insecurity, based on expected changes in income and prices, by providing discussions of local-level, microeconomic differences in food insecurity in low- and middle-income countries.
Wissenschaftskommunikation mit generativer KI: Perspektiven für Einsatz und Governance
Creators: name: Fecher, Benedikt
name: Kohler, Maja
name: Behm-Bahtat, Anne-Sophie
name: Fischer, Liliann
name: Kremer, Bastian
Publisher: name: Wissenschaft im Dialog
Year: 2025

description: Generative Künstliche Intelligenz (KI) hat das Potenzial, das Verhältnis zwischen Wissenschaft und Öffentlichkeit grundlegend zu verändern. Wie lässt sich ein souveräner Umgang mit generativer KI in der Wissenschaftskommunikation gestalten, um Chancen zu nutzen und Unsicherheiten zu begegnen? Was braucht es, um neue Anforderungen an die Governance digitaler Informationsräume zu meistern? Auf Basis des Wissenschaftsbarometers, einer repräsentativen Bevölkerungsbefragung von Wissenschaft im Dialog (WiD), und eines Multistakeholder-Dialogs mit Expert*innen aus Wissenschaft, Kommunikation, Politik und Zivilgesellschaft hat WiD Handlungsperspektiven für den verantwortungsvollen Umgang mit generativer KI in der Wissenschaftskommunikation entwickelt. Wir befürworten einen agilen, zukunftsorientierten Einsatz generativer KI-Tools, der die Prinzipien guter Wissenschaftskommunikation wahrt. Gleichzeitig macht das Beispiel generative KI deutlich, dass sich die Wissenschaftspolitik dringend mit der souveränen Gestaltung und Governance entsprechender Informationsinfrastrukturen befassen muss.
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Gawrychowski, Paweł
name: Starikovskaya, Tatiana
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2021
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Pattern matching

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 191, 32nd Annual Symposium on Combinatorial Pattern Matching (CPM 2021), pages 0:i-0:xiv
Intermediate-Mass Black Holes in Green Pea Galaxies (IMBH-GP) I: a Candidate Sample from LAMOST and SDSS
Creators: name: Lin, Ruqiu
name: Zheng, Zhen-Ya
name: Yuan, Fang-Ting
name: Wang, Jun-Xian
name: Jiang, Chunyan
name: Jiang, Ning
name: Wang, Lingzhi
name: Jiang, Linhua
name: Ji, Xiang
name: Zhu, Shuairu
name: Fu, Xiaodan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The scaling relation of central massive black holes (MBHs) and their host galaxies is well-studied for supermassive BHs (SMBHs, $M_{\rm BH}\ \ge 10^6\, M_{\rm \odot}$). However, this relation has large uncertainties in the mass range of the intermediate-mass BHs (IMBHs, $M_{\rm BH}\ \sim10^3-10^{6}\, M_{\rm \odot}$). Since Green Pea (GP) galaxies are luminous compact dwarf galaxies, which may be likely to host less massive SMBHs or even IMBHs, we systematically search for MBHs in a large sample of 2190 GP galaxies at $z < 0.4$, selected from LAMOST and SDSS spectroscopic surveys. Here, we report a newly discovered sample of 59 MBH candidates with broad H$α$ lines. This sample has a median stellar mass of $10^{8.83\pm0.11}\, M_{\rm \odot}$ and hosts MBHs with single-epoch virial masses ranging from $M_{\rm BH}\ \sim 10^{4.7}$ to $10^{8.5}\, M_{\rm \odot}$ (median $10^{5.85\pm0.64}\, M_{\rm \odot}$). Among the 59 MBH candidates, 36 have black hole masses $M_{\rm BH} \le 10^{6}\, M_{\rm \odot}$ (IMBH candidates), one of which even has $M_{\rm BH} \ \lesssim 10^{5}\, M_{\rm \odot}$. We find that the $M_{\rm BH}-M_{\rm *}$ relation of our MBH sample is consistent with the $M_{\rm BH}-M_{\rm bulge}$ relation for SMBHs, while is above the $M_{\rm BH}-M_{\rm *}$ relation for MBHs in dwarf galaxies in the same mass range. Furthermore, we show that 25 MBH candidates, including 4 IMBH candidates, have additional evidence of black hole activities, assessed through various methods such as the broad-line width, BPT diagram, mid-infrared color, X-ray luminosity, and radio emission. Our studies show that it is very promising to find IMBHs in GP galaxies, and the BH sample so obtained enables us to probe the connection between the MBHs and compact dwarf galaxies in the low-redshift Universe.
description: 17 pages, 8 figures, 2 tables; Accepted for pubulication in SCPMA
Roughening of the Anharmonic Elastic Interface in Correlated Random Media
Creators: name: Alés, Alejandro
name: López, Juan M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the roughening properties of the anharmonic elastic interface in the presence of temporally correlated noise. The model can be seen as a generalization of the anharmonic Larkin model, recently introduced by Purrello, Iguain, and Kolton [Phys. Rev. E {\bf 99}, 032105 (2019)], to investigate the effect of higher-order corrections to linear elasticity in the fate of interfaces. We find analytical expressions for the critical exponents as a function of the anharmonicity index $n$, the noise correlator range $θ\in[0,1/2]$, and dimension $d$. In $d=1$ we find that the interface becomes faceted and exhibits anomalous scaling for $θ> 1/4$ for any degree of anharmonicity $n > 1$. Analytical expressions for the anomalous exponents $α_\mathrm{loc}$ and $κ$ are obtained and compared with a numerical integration of the model. Our theoretical results show that anomalous roughening cannot exist for this model in dimensions $d > 1$.
description: 8 pages and 5 figures
L'expérience marocaine en matière d'analyse des risques dans les contrats de partenariat public privé
Creators: name: HANJIR, JAOUAD
Publisher: name: Yassin Print,Rabat
Year: 2024

description: Durant la dernière décennie, le Maroc a fait le choix d'intensifier l'utilisation des fonds privés par le service public sous forme de contrats appelés Partenariats Public-Privés (PPP). Le contrat de partenariat public-privé est une forme d’association entre le secteur public et le secteur privé dont l’exécution des projets communs d’intérêt public. Les deux parties de cette convention entendent à réaliser des bénéfices et partager les risques. A cet effet, Au cœur de la réalisation des partenariats public-privé (PPP) se trouve une répartition adéquate des risques dans le projet. En effet, la gestion des risques, incluant leur identification, répartition, et maîtrise, nécessite une approche plus sophistiquée par rapport aux méthodes traditionnelles de passation des marchés publics. Cet article vise à examiner les catégories des risques possibles dans un contrat PPP. Il entend, de même, expliquer les risques encourus par chacun des protagonistes lors de la conclusion, l’exécution et l’exploitation des contrats PPP. Enfin, il présente l’intérêt de l’évaluation préalable et l’analyse comparative pour la réussite des projets PPP.
Introducing the structural bases of typicality effects in deep learning
Creators: name: Pino, Omar Vidal
name: Nascimento, Erickson Rangel
name: Campos, Mario Fernando Montenegro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Representation Theory (math.RT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: I.2.4; I.2.6; I.2.10; I.4.8; I.4.10; I.5.1
subject: 68T07 (Primary) 68Q55 (Secondary)

description: In this paper, we hypothesize that the effects of the degree of typicality in natural semantic categories can be generated based on the structure of artificial categories learned with deep learning models. Motivated by the human approach to representing natural semantic categories and based on the Prototype Theory foundations, we propose a novel Computational Prototype Model (CPM) to represent the internal structure of semantic categories. Unlike other prototype learning approaches, our mathematical framework proposes a first approach to provide deep neural networks with the ability to model abstract semantic concepts such as category central semantic meaning, typicality degree of an object's image, and family resemblance relationship. We proposed several methodologies based on the typicality's concept to evaluate our CPM-model in image semantic processing tasks such as image classification, a global semantic description, and transfer learning. Our experiments on different image datasets, such as ImageNet and Coco, showed that our approach might be an admissible proposition in the effort to endow machines with greater power of abstraction for the semantic representation of objects' categories.
description: 14 pages (12 + 2 reference); 13 Figures and 2 Tables. arXiv admin note: text overlap with arXiv:1906.03365
Studies on characterized nucleus gigantocellularis neurones
Creators: name: Harris, David Platt
Publisher: name: University of British Columbia
Year: 2010

description: Periaqueductal gray (PAG) stimulation produced antinociception may be mediated by inhibition of an ascending nociceptive pathway at the brainstem level and/or the activation of descending inhibition on spinal nociceptor-driven neurones. Experiments were performed on urethane anaesthetized rats to establish if there is a monosynaptic pathway from the PAG to the nucleus gigantocellularis (nGC). / Single units in the PAG were able to be antidromically activated by stimulation of the nGC, indicating that a direct pathway does exist. To further clarify nGC involvement in the two possibilities stated above, single units in the nGC were characterized according to their responses to natural stimuli. . About one-half of the neurones tested sere excited by noxious stimuli. Similarly, about one-half of those tested with PAG stimulation were inhibited. Of those neurones affected by both noxious peripheral stimuli and PAG stimulation, the largest group (3755) were excited by the noxious stimuli and inhibited by the PAG stimulation. Intravenous and iontophoretic fluoxetine, a specific serotonin uptake blocker, enhanced the period of inhibition and reduced the excitation of nGC neurones due to PAG stimulation. Furthermore, inhibition of nGC neurones by iontophoretic serotonin or fluoxetine was correlated with the PAG stimulation produced inhibition of these neurones, suggesting that this inhibition was mediated by serotonin. These data suggest that many nGC neurones are in an ascending nociceptive pathway and under inhibitory control of the PAG.
Till death do us part: Transactions between losing one’s spouse and the Big Five personality traits
Creators: name: Asselmann, Eva
name: Specht, Jule
Publisher: name: Humboldt-Universität zu Berlin
Year: 2019
Subjects: subject: Big Five
subject: grief
subject: personality trait change
subject: spousal bereavement
subject: widowhood
subject: 150 Psychologie
subject: 390 Bräuche, Etikette, Folklore

description: Objective Although losing one's spouse is one of the worst experiences that can occur in life, it has not been resolved yet how this experience relates to personality development. Method In the German Socio-Economic Panel study, information on the death of a spouse was assessed yearly from 1985 to 2017 and personality was measured repeatedly in 2005, 2009, 2013, and 2017 with a short version of the Big Five Inventory. We used multilevel analyses to simultaneously model whether personality differed between individuals who did or did not lose their spouse and whether personality changed prior to and after this experience. Results Compared to controls without the event, individuals who lost their spouse at a later point of time were more conscientious (β = .21) and more extraverted (β = .17). They became gradually more extraverted in the three years prior to the event (β = .25), but were less extraverted thereafter (β =−.27). Moreover, they gradually increased in Emotional Stability in the three years after this experience (β = .30). These changes were primarily driven by women and middle-aged individuals. Men whose spouse died were less open in the first year after the event (β =−.47). Conclusions Losing one's spouse relates to changes in Extraversion and Emotional Stability, especially in women and middle-aged adults.
Geschlechterbilder im intergenerationellen Transfer: Erbschaften aus dem Nationalsozialismus
Creators: name: Wachsmuth, Iris
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2008

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 19 Nr. 2 (2008): Auto/Biographie, Gewalt und Geschlecht
How Many Essentially Different Functional Theories Exist?
Creators: name: Kisil, Vladimir V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30G35

description: The question in the title is ambiguous. At least the understanding of words essentially different and function theory should be clarified. We discuss approaches to do that. We also present a new framework for analytic function theories based on group representations.
description: Historic submission, LaTeX2e, 9 pages. arXiv admin note: substantial text overlap with arXiv:math/0204018
Search for cold gas along radio lobes in the cooling core galaxies MS0735.6+7421 and M87
Creators: name: Salomé, P.
name: Combes, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report CO observations towards MS0735.6+7421 a distant cooling core galaxy, and towards M87, the nearest cooling core in the center of the Virgo cluster. Both galaxies contain radio cavities that are thought to be responsible for the heating that can regulate or stop the cooling of the surrounding gas. In this feedback process, there could still be some gas cooling along filaments, along the borders of the radio cavities. Molecular gas is known to exist in clusters with cooling cores, in long and thin filaments that can be formed behind the rising bubbles inflated by the central AGN. CO emission was searched for at several locations along the radio lobes of those two galaxies, but only upper limits were found. These correspond to cold gas mass limits of a few 10^9 Msol for each pointing in MS0735.6+7421, and a few 10^6 Msol in M87. This non detection means that either the cooling is strongly reduced by the AGN feedback or that the gas is cooling in very localized places like thin filaments, possibly diluted in the large beam for MS0735.6+7421. For M87, the AGN heating appears to have stopped the cooling completely.
description: 10 pages, 5 figures, accepted in A&A
Radio Remote Sensing of the Corona and the Solar Wind
Creators: name: Spangler, Steven R.
name: Whiting, Catherine A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Modern radio telescopes are extremely sensitive to plasma on the line of sight from a radio source to the antenna. Plasmas in the corona and solar wind produce measurable changes in the radio wave amplitude and phase, and the phase difference between wave fields of opposite circular polarization. Such measurements can be made of radio waves from spacecraft transmitters and extragalactic radio sources, using radio telescopes and spacecraft tracking antennas. Data have been taken at frequencies from about 80 MHz to 8000 MHz. Lower frequencies probe plasma at greater heliocentric distances. Analysis of these data yields information on the plasma density, density fluctuations, and plasma flow speeds in the corona and solar wind, and on the magnetic field in the solar corona. This paper will concentrate on the information that can be obtained from measurements of Faraday rotation through the corona and inner solar wind. The magnitude of Faraday rotation is proportional to the line of sight integral of the plasma density and the line-of-sight component of the magnetic field. Faraday rotation provides an almost unique means of estimating the magnetic field in this part of space. This technique has contributed to measurement of the large scale coronal magnetic field, the properties of electromagnetic turbulence in the corona, possible detection of electrical currents in the corona, and probing of the internal structure of coronal mass ejections (CMEs). This paper concentrates on the search for small-scale coronal turbulence and remote sensing of the structure of CMEs. Future investigations with the Expanded Very Large Array (EVLA) or Murchison Widefield Array (MWA) could provide unique observational input on the astrophysics of CMEs.
description: Submitted to proceedings of IAU Symposium 257, "Universal Heliophysical Processes", N. Gopalswamy and D. Webb, editors
Inverse kinetic theory for incompressible thermofluids
Creators: name: Cremaschini, C.
name: Tessarotto, and M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: An interesting issue in fluid dynamics is represented by the possible existence of inverse kinetic theories (IKT) which are able to deliver, in a suitable sense, the complete set of fluid equations which are associated to a prescribed fluid. From the mathematical viewpoint this involves the formal description of a fluid by means of a classical dynamical system which advances in time the relevant fluid fields. The possibility of defining an IKT for the 3D incompressible Navier-Stokes equations (INSE), recently investigated (Ellero \textit{et al}, 2004-2007) raises the interesting question whether the theory can be applied also to thermofluids, in such a way to satisfy also the second principle of thermodynamics. The goal of this paper is to prove that such a generalization is actually possible, by means of a suitable \textit{extended phase-space formulation}. We consider, as a reference test, the case of non-isentropic incompressible thermofluids, whose dynamics is described by the Fourier and the incompressible Navier-Stokes equations, the latter subject to the conditions of validity of the Boussinesq approximation.
description: Contributed paper at RGD26 (Kyoto, Japan, July 2008)
Non-linear isocurvature perturbations and non-Gaussianities
Creators: name: Langlois, David
name: Vernizzi, Filippo
name: Wands, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study non-linear primordial adiabatic and isocurvature perturbations and their non-Gaussianity. After giving a general formulation in the context of an extended delta N-formalism, we analyse in detail two illustrative examples. The first is a mixed curvaton-inflaton scenario in which fluctuations of both the inflaton and a curvaton (a light isocurvature field during inflation) contribute to the primordial density perturbation. The second example is that of double inflation involving two decoupled massive scalar fields during inflation. In the mixed curvaton-inflaton scenario we find that the bispectrum of primordial isocurvature perturbations may be large and comparable to the bispectrum of adiabatic curvature perturbations.
description: 24 pages, typos corrected, references added
Note on a theorem of Bousfield and Friedlander
Creators: name: Stanculescu, Alexandru E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We examine the proof of a classical localization theorem of Bousfield and Friedlander and we remove the assumption that the underlying model category be right proper. The key to the argument is a lemma about factoring in morphisms in the arrow category of a model category.
description: A small mistake in the published version is fixed
Series expansions in Fréchet spaces and their duals; construction of Fréchet frames
Creators: name: Pilipović, Stevan
name: Stoeva, Diana T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C15, 42C20, 46A13, 46A45

description: Frames for Fréchet spaces $X_F$ with respect to Fréchet sequence spaces $Θ_F$ are studied and conditions, implying series expansions in $X_F$ and $X_F^*$, are determined. If $\{g_i\}$ is a $Θ_0$-frame for $X_0$, we construct a sequence $\{X_s\}_{s\in {\mathbb N}_0}$, $X_s\subset X_{s-1}$, $s\in {\mathbb N}$, for given $Θ_F$, respectively a sequence $\{Θ_s\}_{s\in {\mathbb N}_0}$, $Θ_s\subset Θ_{s-1}$, $s\in {\mathbb N}$, for given $X_F$, so that $\{g_i\}$ is a pre-$F$-frame (or $F$-frame) for $X_F$ with respect to $Θ_F$ under different assumptions given on $X_0$, $Θ_0$, $Θ_F$ or $X_0$, $Θ_0$, $X_F$.
COVID-19 Working Paper: Filling the Pandemic Meal Gap: Disruptions to Child Nutrition Programs and Expansion of Free Meal Sites in the Early Months of the Pandemic
Creators: name: Toossi, Saied
name: Toossi, Saied
Publisher: name: Unknown
Year: 2021
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: COVID-19
subject: coronavirus
subject: pandemic
subject: child nutrition programs

description: Beginning in March 2020, the Coronavirus (COVID-19) pandemic struck the United States abruptly and unexpectedly, forcing the school and childcare center closures nationwide. These closures disrupted the provision of meals to children through the largest of the U.S. Department of Agriculture’s (USDA) child nutrition programs. In response, USDA issued a series of waivers to facilitate the continued provision of meals to children while prioritizing the health and safety of communities. This study assesses the extent to which the child nutrition infrastructure was able to rapidly adapt to meet the needs of children at the onset of the crisis. It documents disruptions in the provision of meals through the National School Lunch Program, School Breakfast Program, and Child and Adult Care Food Program from March through May 2020. In addition, this report examines the extent waivers allowed for greater flexibility in the implementation of these programs and the expansion of free meal sites helped to compensate for these disruptions.
Weak Signals in the Mobility Landscape: Car Sharing in Ten European Cities
Creators: name: Boldrini, Chiara
name: Bruno, Raffaele
name: Laarabi, Haitam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Car sharing is one the pillars of a smart transportation infrastructure, as it is expected to reduce traffic congestion, parking demands and pollution in our cities. From the point of view of demand modelling, car sharing is a weak signal in the city landscape: only a small percentage of the population uses it, and thus it is difficult to study reliably with traditional techniques such as households travel diaries. In this work, we depart from these traditional approaches and we leverage web-based, digital records about vehicle availability in 10 European cities for one of the major active car sharing operators. We discuss which sociodemographic and urban activity indicators are associated with variations in car sharing demand, which forecasting approach (among the most popular in the related literature) is better suited to predict pickup and drop-off events, and how the spatio-temporal information about vehicle availability can be used to infer how different zones in a city are used by customers. We conclude the paper by presenting a direct application of the analysis of the dataset, aimed at identifying where to locate maintenance facilities within the car sharing operation area.
description: This work was partially funded by the ESPRIT, REPLICATE and SoBigData projects, which have received funding from the European Union's Horizon 2020 research and innovation programme under grant agreements No 653395, No 691735, and No 654024, respectively. arXiv admin note: text overlap with arXiv:1708.00497