cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decays of Scalar and Pseudoscalar Higgs Bosons into Fermions: Two-loop QCD Corrections to the Higgs-Quark-Antiquark Amplitude
Creators: name: Bernreuther, W.
name: Bonciani, R.
name: Gehrmann, T.
name: Heinesch, R.
name: Mastrolia, P.
name: Remiddi, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: As a first step in the aim of arriving at a differential description of neutral Higgs boson decays into heavy quarks, $h \to Q {\bar Q}X$, to second order in the QCD coupling $α_S$, we have computed the $hQ{\bar Q}$ amplitude at the two-loop level in QCD for a general neutral Higgs boson which has both scalar and pseudoscalar couplings to quarks. This amplitude is given in terms of a scalar and a pseudoscalar vertex form factor, for which we present closed analytic expressions in terms of one-dimensional harmonic polylogarithms of maximum weight 4. The results hold for arbitrary four-momentum squared, $q^2$, of the Higgs boson and of the heavy quark mass, $m$. Moreover we derive the approximate expressions of these form factors near threshold and in the asymptotic regime $m^2/q^2 \ll 1$.
description: 56 pages, 2 figures
Dilepton production at SIS energies
Creators: name: Bratkovskaya, E. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this short review the results of detailed studies for dilepton production from $p+A$ and $A+A$ reactions at SIS energies are presented. The calculations are based on a semi-classical BUU transport model that includes the off-shell propagation of vector mesons and evaluates the width of the vector mesons dynamically. Different scenarios of in-medium modifications of vector mesons, such as collisional broadening and dropping vector meson masses, are investigated and the possibilities for an experimental observation of in-medium effects in $p+A$ reactions at 1--4 GeV are discussed for a variety of nuclear targets.
description: 9 pages, 2 figures, based on the invited talks at the Workshop on 'In-medium Hadrons Physics'(Giessen, Germany, Nov. 11-13, 2004), to be published in Heavy Ion Physics
Hyperbolic heat equation in Kaluza's magnetohydrodynamics
Creators: name: Sandoval-Villalbazo, A.
name: Garcia-Perciante, A. L.
name: Garcia-Colin, L. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper shows that a hyperbolic equation for heat conduction can be obtained directly using the tenets of linear irreversible thermodynamics in the context of the five dimensional space-time metric originally proposed by T. Kaluza back in 1922. The associated speed of propagation is slightly lower than the speed of light by a factor inversely proportional to the specific charge of the fluid element. Moreover, consistency with the second law of thermodynamics is achieved. Possible implications in the context of physics of clusters of galaxies of this result are briefly discussed.
description: 14 pages, no figures
Repulsive properties of hadrons in lattice QCD data and neutron stars
Creators: name: Motornenko, Anton
name: Pal, Somenath
name: Bhattacharyya, Abhijit
name: Steinheimer, Jan
name: Stoecker, Horst
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Second-order susceptibilities $χ^{11}_{ij}$ of baryon, electric, and strangeness, $B$, $Q$, and $S$, charges, are calculated in the Chiral Mean Field (CMF) model and compared to available lattice QCD data. The susceptibilities are sensitive to the short range repulsive interactions between different hadron species, especially to the hardcore repulsion of hyperons. Decreasing the hyperons size, as compared to the size of the non-strange baryons, does improve significantly the agreement of the CMF model results with the Lattice QCD data. The electric charge-dependent susceptibilities are sensitive to the short range repulsive volume of mesons. The comparison with lattice QCD data suggests that strange baryons, non-strange mesons and strange mesons have significantly smaller excluded volumes than non-strange baryons. The CMF model with these modified hadron volumes allows for a mainly hadronic description of the QCD susceptibilities significantly above the chiral pseudo-critical temperature. This improved CMF model which is based on the lattice QCD data, has been used to study the properties of both cold QCD matter and neutron star matter. The phase structure in both cases is essentially unchanged, i.e. a chiral first-order phase transition occurs at low temperatures ($T_{\rm CP}\approx 17$ MeV), and hyperons survive deconfinement to higher densities than non-strange hadrons. The neutron star maximal mass remains close to 2.1$M_\odot$ and the mass-radius diagram is only modified slightly due to the appearance of hyperons and is in agreement with astrophysical observations.
description: 11 pages, 9 figures
Pavement Surveys
Creators: name: Evans, Milton
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1961
Subjects: subject: Transportation Engineering

description: A review of the above referenced reports has been made in order to determine reasonable criteria for portland cement concrete pavement surface condition evaluations. Table 1 is provided to allow comparison of the several projects which have been inspected for surface defects.  The major considerations in the evaluation of a slab's condition, where surface defects exist, are the number of defects, their type and size. It is possible for a slab to contain a large number of surface intrusions without being appreciably damaged, if the impairments are all very small. On the other hand, only a few very large defects would be very damaging. Certainly, the most satisfactory condition would be the complete absence of blemishes.  In the surveys which have been made since the beginning of these pavement investigations, soil holes, chert pop-outs, shale pitting, trash imbedments and cracks have comprised nearly one hundred percent of the defects observed. The defects are listed in declining order of damaging effect to the slabs inspected. By far, the most prevalent types of defects are soil holes and chert pop-outs. These surveys have been made, insofar as possible, to include all defects which were one-half inch or more in diameter and all transverse cracks.
Ambivalent effects of added layers on steady kinematic dynamos in cylindrical geometry: application to the VKS experiment
Creators: name: Stefani, F.
name: Xu, M.
name: Gerbeth, G.
name: Ravelet, F.
name: Chiffaudel, A.
name: Daviaud, F.
name: Léorat, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Astrophysics (astro-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The intention of the ''von Karman sodium'' (VKS) experiment is to study the hydromagnetic dynamo effect in a highly turbulent and unconstrained flow. Much effort has been devoted to the optimization of the mean flow and the lateral boundary conditions in order to minimize the critical magnetic Reynolds number and hence the necessary motor power. The main focus of this paper lies on the role of ''lid layers'', i.e. layers of liquid sodium between the impellers and the end walls of the cylinder. First, we study an analytical test flow to show that lid layers can have an ambivalent effect on the efficiency of the dynamo. The critical magnetic Reynolds number shows a flat minimum for a small lid layer thickness, but increases for thicker layers. For the actual VKS geometry it is shown that static lid layers yield a moderate increase of the critical magnetic Reynolds number by approximately 12 per cent. A more dramatic increase by 100 until 150 per cent can occur when some rotational flow is taken into account in those layers. Possible solutions of this problem are discussed for the real dynamo facility.
description: 24 pages, 11 figures, minor changes, to appear in European Journal of Mechanics B/Fluids
Maximum Black Hole mass across Cosmic Time
Creators: name: Vink, Jorick S.
name: Higgins, Erin R.
name: Sander, Andreas A. C.
name: Sabhahit, Gautham N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: At the end of its life, a very massive star is expected to collapse into a black hole. The recent detection of an 85 Msun black hole from the gravitational wave event GW 190521 appears to present a fundamental problem as to how such heavy black holes exist above the approximately 50 Msun pair-instability limit where stars are expected to be blown to pieces with no remnant left. Using MESA, we show that for stellar models with non-extreme assumptions, 90..100 Msun stars at reduced metallicity (Z/Zsun < 0.1) can produce blue supergiant progenitors with core masses sufficiently small to remain below the fundamental pair-instability limit, yet at the same time lose an amount of mass via stellar winds that is small enough to end up in the range of an "impossible" 85 Msun black hole. The two key points are the proper consideration of core overshooting and stellar wind physics with an improved scaling of mass loss with iron (Fe) contents characteristic for the host galaxy metallicity. Our modelling provides a robust scenario that not only doubles the maximum black hole mass set by pair instability, but also allows us to probe the maximum stellar black hole mass as a function of metallicity and Cosmic time in a physically sound framework.
description: MNRAS Accepted. 9 pages, 3 figures. Prior Submission in September 2020 to Nature (see Research Square)
Crowdwork and international trade: Opportunities and challenges
Creators: name: Olguin, Michelle
name: Maza, Fabiola
name: Nguyen, Amy
Publisher: name: figshare
Year: 2021
Subjects: subject: 180117 International Trade Law
subject: FOS: Law

description: The report is focused on the current debates in the trade regime that impact crowdworking platforms, and how some domestic regulations are dealing with it. Although most of the academic concerns regarding crowdworking platforms are related to the labour standards, the trade regime imposes some challenges to the development of these technologies as a source of employment. Data regulation, taxation, jurisdiction and competition are some of the main debates that could shape future platforms and business models, as well as forms of work.
Gamma ray and Neutrino fluxes from a cosmological dark matter simulation
Creators: name: Athanassoula, E.
name: Ling, F. -S.
name: Nezri, E.
name: Teyssier, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we estimate the gamma-ray and neutrino fluxes coming from dark matter annihilation in a Milky Way framework provided by a recent N-BODY HORIZON simulation. We first study the characteristics of the simulation and highlight the mass distribution within the galactic halo. The general dark matter density has a typical $r^{-3}$ power law for large radii, but the inner behaviour is poorly constrained below the resolution of the simulation ($\sim 200$ pc). We identify clumps and subclumps and analyze their distribution, as well as their internal structure. Inside the clumps, the power law is rather universal, $r^{-2.5}$ in the outer part with again strong uncertainties for smaller radii, especially for light clumps. We show a full-sky map of the astrophysical contribution to the gamma-ray or neutrino fluxes in this N-body framework. Using quite model independent and general assumptions for the high energy physics part, we evaluate the possible absolute fluxes and show some benchmark regions for the experiments GLAST, EGRET, and a km3 size extension of ANTARES like the KM3NeT project. While individual clumps seem to be beyond detection reach, the galactic center region is promising and GLAST could be sensitive to the geometry and the structure of its dark matter distribution. The detection by a km3 version of ANTARES is, however, more challenging due to a higher energy threshold. We also point out that the lack of resolution leaves the inner structure of subhalos poorly constrained. Using the same clump spectrum and mass fraction, a clump luminosity boost of order ten can be achieved with a steeper profile in the inner part of the sub-halos.
description: 15 pages, 8 figures
A HEDONIC PRICE STUDY OF PESTICIDES IN FRUITS AND VEGETABLES; Proceedings of the Fifth Joint Conference on Agriculture, Food, and the Environment, June 17-18, 1996, Padova, Italy
Creators: name: Antonovitz, Frances
name: Liu, Donald J.
name: Antonovitz, Frances
name: Liu, Donald J.
Publisher: name: Unknown
Year: 1996
Subjects: Crop Production/Industries

description: This study estimates a hedonic price equation to assess consumers' willingness-to-pay for reduction in pesticide residues in fifteen fruits and vegetables. A unique feature of the study is its employment of the FDA's Total Diet Study data which attempts to measure actual pesticide ingestion by the American public in table-ready or prepared foods. The results indicate that consumers would be willing to pay approximately $.08 per pound to reduce pesticeds by one part per million in the prepared fruits and vegetables that they consume.
Fuerth, Patrick W.: The concept of catholicity in the documents of the World Council of Churches 1948-1968
Creators: name: Wolf, Hans-Heinrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 24 Nr. 2 (1975): Ökumenische Rundschau, Band 24, Heft 2
Minnesota Agriculture in the New Millenium
Creators: name: Runge, C. Ford
name: Runge, C. Ford
Publisher: name: Unknown
Year: 2005
Subjects: Agricultural and Food Policy

description: Minnesota is by any standard one of the leading agricultural places in the United States, both in terms of farm production and as a headquarters for some of the largest agrifood and agronomic enterprises in the world. Several factors are likely to affect the future of Minnesota agriculture in the 21st century. First, the state is likely to remain a center of agribusiness activity, and is emerging as a leader in the development of new technologies based in genomics and renewable fuels. Second, Minnesota agriculture will remain highly dependent on global markets, and thus has a major stake in world trade. Third, domestic farm and fiscal policies will determine the extent to which the state continues to receive federal payments to farmers, who also depend on the overall health of the economy. Finally, the rising cost of fossil-fuel based energy has major implications for Minnesota farmers' costs for fuel, fertilizer and transport. Together, these four factors describe an environment that will challenge Minnesota agriculture in the years to come.
Instability of small-amplitude convective flows in a rotating layer with stress-free boundaries
Creators: name: Podvigina, O. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We consider stability of steady convective flows in a horizontal layer with stress-free boundaries, heated below and rotating about the vertical axis, in the Boussinesq approximation (the Rayleigh-Benard convection). The flows under consideration are convective rolls or square cells, the latter being asymptotically equal to the sum of two orthogonal rolls of the same wave number k. We assume, that the Rayleigh number R is close to the critical one, R_c(k), for the onset of convective flows of this wave number: R=R_c(k)+epsilon^2; the amplitude of the flows is of the order of epsilon. We show that the flows are always unstable to perturbations, which are a sum of a large-scale mode not involving small scales, and two large-scale modes, modulated by the original rolls rotated by equal small angles in the opposite directions. The maximal growth rate of the instability is of the order of max(epsilon^{8/5},(k-k_c)^2), where k_c is the critical wave number for the onset of convection.
description: Latex, 12 pp., 15 refs. An improved version of the manuscript submitted to "Mechanics of fluid and gas", 2006 (in Russian; English translation "Fluid Dynamics")
Analyzing Health Innovations in a School Lunch Program
Creators: name: Grainger, Corbett
name: Senauer, Benjamin
name: Runge, C. Ford
name: Grainger, Corbett
name: Senauer, Benjamin
name: Runge, C. Ford
Publisher: name: Unknown
Year: 2005
Subjects: Food Consumption/Nutrition/Food Safety

description: Hopkins School District in Minnesota implemented an innovative school feeding program, which provides nutritionally sound foods that appeal to students. With access to a unique data set containing students' food service purchases and demographic data from Hopkins High School, we use logit models to analyze the impact of different phases of the program on participation rates, as well as the effect of demographic factors. A relative healthfulness index for the foods purchased is calculated based on information provided by the school dietitian. This index is used to analyze the impact of demographic variables, student lunch expenditures, and program changes on students' lunch consumption. The results of the econometric models indicate that the program innovations have caused positive behavioral changes in most students and that students are choosing healthier foods than under the old program. Moreover, we find that ethnicity and gender play major roles in determining how students react to the new program in Hopkins.
Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms
Creators: name: Eden, S.
name: Tabet, J.
name: Samraoui, K.
name: Louc, S.
name: Farizon, B.
name: Farizon, M.
name: Ouaskit, S.
name: Märk, T. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Absolute dissociation cross sections are reported for Hn+ clusters of varied mass (n = 3, 5, ..., 35) following collisions with He atoms at 60 keV / amu. Initial results have been published in a previous brief report for a smaller range of cluster sizes [Ouaskit et al., Phys. Rev. A 49, 1484 (1994)]. The present extended study includes further experimental results, reducing the statistical errors associated with the absolute cross sections. The previously suggested quasi-linear dependence of the Hn+ dissociation cross sections upon n is developed with reference to expected series of geometrical shells of H2 molecules surrounding an H3+ core. Recent calculations identify n = 9 as corresponding to the first closed H2 shell [e.g. Stich et al., J. Chem. Phys. 107, 9482 (1997)]. Recurrence of the distinct characteristics observed in the dissociation cross section dependence upon cluster size around n = 9 provides the basis for the presently proposed subsequent closed shells at n = 15, 21, 27, and 33, in agreement with the calculations of Nagashima et al. [J. Phys. Chem. 96, 4294 (1992)].
description: To be published in Physical Review A
Harvey Carlson Papers on the Aikana Language
Creators: name: Espirito Santo, Luis
name: Machado, Julião
name: Ramos, José
name: Sousa, Manoel Viera De
name: Viera De Sousa, Getulio
name: Viera De Sousa, Pedro
name: Bontkes, William
name: Buszard-Welcher, Laura
name: Carlson, Harvey
name: Hinton, Leanne
name: Hyman, Larry
name: Kramer, Marvin
name: Liang, Anita
name: Melatti, Julio Cezar
name: Morgan, Pam
name: Peterson, David
name: Weigel, William F.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015

description: The Papers document Carlson's field research on Aikana in Rondonia, Brazil form April-June of 1984. The collection includes his original Aikana field notebooks and photographs and a small amount of material for the Kwaza language. Carlson's main linguistic consultants were Manoel Viera de Sousa, Pedro Viera de Sousa, Getulio Viera de Sousa, and Luis Espirito Santo (Aikana) and Joséamos (Kwaza). Also included are materials developed for a field methods course held at the University of California, Berkeley in 1992 based on Carlson's field data.
The impact of the new Earth gravity model EIGEN-CG03C on the measurement of the Lense-Thirring effect with some existing Earth satellites
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The impact of the latest combined CHAMP/GRACE/terrestrial measurements Earth gravity model EIGEN-CG03C on the measurement of the Lense-Thirring effect with some linear combinations of the nodes of some of the existing Earth's artificial satellites is presented. The 1-sigma upper bound of the systematic error in the node-node LAGEOS-LAGEOS II combination is 3.9% (4% with EIGEN-GRACE02S, \sim 6% with EIGEN-CG01C and \sim 9% with GGM02S), while it is 1$% for the node-only LAGEOS-LAGEOS II-Ajisai-Jason-1 combination (2% with EIGEN-GRACE02S, 1.6% with EIGEN-CG01C and 2.7% with GGM02S).
description: LaTex2e, 7 pages, 16 references, 1 table. It is an update of the impact of the even zonal harmonics of the geopotential on the Lense-Thirring effect with the EIGEN-GGM03C Earth gravity model publicly released on May 11 2005. Typos corrected. Reference added. To appear in General Relativity and Gravitation, March 2006
Survey propagation at finite temperature: application to a Sourlas code as a toy model
Creators: name: Wemmenhove, B
name: Kappen, H J
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we investigate a finite temperature generalization of survey propagation, by applying it to the problem of finite temperature decoding of a biased finite connectivity Sourlas code for temperatures lower than the Nishimori temperature. We observe that the result is a shift of the location of the dynamical critical channel noise to larger values than the corresponding dynamical transition for belief propagation, as suggested recently by Migliorini and Saad for LDPC codes. We show how the finite temperature 1-RSB SP gives accurate results in the regime where competing approaches fail to converge or fail to recover the retrieval state.
Was the Universe neutral beyond redshift six?
Creators: name: Gallerani, S.
name: Ferrara, A.
name: Fan, X.
name: Roy, Choudhury T.
name: Salvaterra, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We provide measurements of the neutral hydrogen fraction xHI at z~6, by comparing semi-analytical models of the Lyalpha forest with observations of high-z quasars and Gamma Ray Bursts absorption spectra. We analyze the transmitted flux in a sample of 17 QSOs spectra at 5.74
description: 6 pages, 3 figures; to appear in the Proceedings `A Century of Cosmology', San Servolo (Venezia, Italy), August 2007, to be published in `Il Nuovo Cimento'; typos corrected
2D-3D Geometric Fusion Network using Multi-Neighbourhood Graph Convolution for RGB-D Indoor Scene Classification
Creators: name: Mosella-Montoro, Albert
name: Ruiz-Hidalgo, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Multi-modal fusion has been proved to help enhance the performance of scene classification tasks. This paper presents a 2D-3D Fusion stage that combines 3D Geometric Features with 2D Texture Features obtained by 2D Convolutional Neural Networks. To get a robust 3D Geometric embedding, a network that uses two novel layers is proposed. The first layer, Multi-Neighbourhood Graph Convolution, aims to learn a more robust geometric descriptor of the scene combining two different neighbourhoods: one in the Euclidean space and the other in the Feature space. The second proposed layer, Nearest Voxel Pooling, improves the performance of the well-known Voxel Pooling. Experimental results, using NYU-Depth-V2 and SUN RGB-D datasets, show that the proposed method outperforms the current state-of-the-art in RGB-D indoor scene classification task.
description: Information Fusion 2021
Determining the Structure of Rotating Massive Stellar Cores with Gravitational Waves
Creators: name: Pajkos, Michael A.
name: Warren, MacKenzie L.
name: Couch, Sean M.
name: O'Connor, Evan P.
name: Pan, Kuo-Chuan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The gravitational wave (GW) signal resulting from stellar core collapse encodes a wealth of information about the physical parameters of the progenitor star and the resulting core-collapse supernova (CCSN). We present a novel approach to constrain CCSN progenitor properties at collapse using two of the most detectable parts of the GW signal: the core-bounce signal and evolution of the dominant frequency mode from the protoneutron star. We focus on the period after core bounce but before explosion and investigate the predictive power of GWs from rotating CCSNe to constrain properties of the progenitor star. We analyze 34 2D and four 3D neutrinoradiation-hydrodynamic simulations of stellar core collapse in progenitors of varied initial mass and rotation rate. Extending previous work, we verify the compactness of the progenitor at collapse to correlate with the early ramp-up slope, and in rotating cases, also with the core angular momentum. Combining this information with the bounce signal, we present a new analysis method to constrain the pre-collapse core compactness of the progenitor. Because these GW features occur less than a second after core bounce, this analysis could allow astronomers to predict electromagnetic properties of a resulting CCSN even before shock breakout.
description: 21 pages, 11 figures; Published in ApJ
THE CURRENT AND FUTURE WORLD FOOD SITUATION: IS THERE AN EMERGING FOOD SHORTAGE?
Creators: name: Senauer, Benjamin
name: Stevens, Stanley C.
name: Senauer, Benjamin
name: Stevens, Stanley C.
Publisher: name: Unknown
Year: 1996
Subjects: Food Security and Poverty

description: This paper gives an overview of the current and projected food situation in the U.S. and the world.
Machine Learning in Photonics
Creators: name: Da Ros, Francesco
Publisher: name: Zenodo
Year: 2021
Subjects: Photonics
Machine Learning
Optical Fibers
Neural Networks
End-to-end Learning
Bayesian Filtering
Raman Amplifiers

description: The Machine learning toolbox brings significant advantages to optics.

 Machine learning is effective in learning complex mappings
 – Improve measurements’ accuracy
 – Design/optimization of optical components (amplifiers, photonic chips, etc.)
 – Enhance communication over the fiber optic channel
description: Further supported by: Villum Foundations (VYI grant OPTIC-AI no.29344)
On the non existence of cyclical food-consumption patterns in a model of non-addictive eating
Creators: name: Dragone, Davide
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/02 Politica economica

description: In a paper previously published in this journal, Levy (2002) [Levy A., 2002, Rational eating: can it lead to overweightness or underweightness? Journal of Health Economics 21, 887.899] presents a model of rational non-addictive eating
that is claimed to explain cyclical food-consumption patterns where binges and
strict diets alternate. I show that the model admits no oscillation at all, as the unique internal steady state has saddle point stability.
Simulating hydrodynamics on noisy intermediate-scale quantum devices with random circuits
Creators: name: Richter, Jonas
name: Pal, Arijeet
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent milestone experiment, Google's processor Sycamore heralded the era of "quantum supremacy" by sampling from the output of (pseudo-)random circuits. We show that such random circuits provide tailor-made building blocks for simulating quantum many-body systems on noisy intermediate-scale quantum (NISQ) devices. Specifically, we propose an algorithm consisting of a random circuit followed by a trotterized Hamiltonian time evolution to study hydrodynamics and to extract transport coefficients in the linear response regime. We numerically demonstrate the algorithm by simulating the buildup of spatiotemporal correlation functions in one- and two-dimensional quantum spin systems, where we particularly scrutinize the inevitable impact of errors present in any realistic implementation. Importantly, we find that the hydrodynamic scaling of the correlations is highly robust with respect to the size of the Trotter step, which opens the door to reach nontrivial time scales with a small number of gates. While errors within the random circuit are shown to be irrelevant, we furthermore unveil that meaningful results can be obtained for noisy time evolutions with error rates achievable on near-term hardware. Our work emphasizes the practical relevance of random circuits on NISQ devices beyond the abstract sampling task.
description: 6 pages, 5 figures (+ 5 pages, 7 figures)
On the non-neutrality of profit taxation in a Cournot oligopoly with environmental effects
Creators: name: Dragone, Davide
name: Lambertini, Luca
name: Palestini, Arsen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/01 Economia politica

description: We consider the joint effect of profit and Pigouvian taxation in a model of
imperfect competition. We show that, when both profit taxation and Pigouvian
taxation/subsidy are used, the former is no longer neutral. The two
fiscal tools are substitutes, and for any profit taxation rate there exists a
unique Pigouvian tax that entails the first best outcome as an equilibrium.
Our analysis therefore suggests that policy makers in charge of different taxation
policies should coordinate in order to optimally design the tax menu
for firms.
Kottje, Raimund; Moeller, Bernd: Ökumenische Kirchengeschichte Band III: Neuzeit
Creators: name: Kantzenbach, Friedrich Wilhelm
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 24 Nr. 2 (1975): Ökumenische Rundschau, Band 24, Heft 2
Organizational Change, Skill Formation, Human Capital Measurement: Evidence From Italian Manufacturing Firms
Creators: name: Antonelli, Gilberto
name: Antonietti, Roberto
name: Guidetti, Giovanni
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/01 Economia politica

description: Basing on a job competition approach, in this paper we provide a labour demand-oriented measure of human
capital as defined by the amount of specific skills a firm generates through work-based training (WBT)
activities.
By merging three rich firm-level datasets, we estimate the impact of a set of variables that are supposed to affect
both the propensity to invest in WBT and the intensity of training within the Italian manufacturing industry over
the period 2001-2005.The estimates show that the effects of innovation on WBT is higher when the introduction
of new technologies is supported by organizational innovations. When looking at the nature of WBT, we
investigate the different determinants of the firms' propensity to provide both in-house and outside training.
Finally, we estimate training intensity in terms, respectively, of the number of training activities provided,
private and total training costs and the share of trainees.
The Birth-Cluster of the Galactic Luminous Blue Variable WRA751
Creators: name: Pasquali, A.
name: Comeron, F.
name: Nota, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of NTT/VLT UBV imaging of a 260 square arcmin region containing the Galactic Luminous Blue Variable WRA751, in search for its birth-cluster, i.e. a cluster of young and massive stars spatially and physically associated with it. On the basis of the classical reddening-free parameter Q, we have identified a sample of 24 early-type stars with colours typical of spectral types earlier than B3. Interestingly, these stars are clustered within a radius of 1 arcmin from WRA751, corresponding to about 1% of the imaged field. These stars tightly distribute around (B-V) = 1.67, which in turn defines a mean extinction A(V) = 6.1 mag. The 5 brighter (V > 16.2) and bluer (Q < -0.9) stars of the sample have been subsequently observed with FORS1 and classified as 3 late O- and 2 early B- stars. The absence of stars earlier than O8 indicates an age of the cluster older than 4 Myr, although it could be due to an incomplete sampling of the upper end of the main sequence. Nevertheless, the detection of OB stars of class I certainly indicates an age of a few million years. At an assumed distance of 6 kpc, we estimate a cluster radius of 3.4 pc and a total mass of 2200 solar masses. Our discovery is only the second known instance of a Galactic Luminous Blue Variable associated with its birth-cluster.
description: 8 pages, 6 figures, accepted by A&A
Hourly Wages in Crowdworking: A Meta-Analysis
Creators: name: Hornuf, Lars
name: Vrankar, Daniel
Publisher: name: Universität Bremen
Year: 2022
Subjects: subject: Crowdworking
subject: Crowdsourcing
subject: Meta-analysis
subject: Hourly wage
subject: Remuneration
subject: Gig-economy
subject: 330

description: In the past decade, crowdworking on online labor market platforms has become the main source of income for a growing number of people worldwide. This development has led to increasing political and scientific interest in the wages that people can earn on such platforms. In this article, we extend the literature based on a single platform, region, or category of crowdworking by conducting a meta-analysis of the prevalent hourly wages. After a systematic and rigorous literature search, we consider 20 primary empirical studies, including 104 wages and 76,282 data points from 22 platforms, eight different countries, and a time span of 12 years. We find that, on average, microwork results in an hourly wage of less than $6. This wage is significantly lower than the mean wage of online freelancers, which is roughly three times higher. We find that hourly wages accounting for unpaid work, such as searching for tasks and communicating with requesters, tend to be significantly lower than wages not considering unpaid work. Legislators and researchers evaluating wages in crowdworking should be aware of this bias when assessing hourly wages, given that the majority of the literature does not account for the effect of unpaid work time on crowdworking wages. To foster the comparability of different research results, we suggest that scholars consider a wage malus to account for unpaid work. Finally, we find that hourly wages collected through surveys tend to be lower than wages collected via browser plugins or other technical data collection methods.
Shirley Silver Papers on California Indian Languages
Creators: name: Fulwider, Minnie
name: Montgomery, Lily
name: Sambo, Sargent
name: Silver, Shirley
name: Siniard, Roy
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015

description: The Papers document Shirley Silver's research on the indigenous languages of California. This includes a microfilm copy of her Shasta field notes collected in the summers of 1957-1961. Sargent Sambo was her main Shasta language consultant, and she recorded additional material with Clara Wicks (Shasta) and Lily Montgomery (Yana). The collection also includes copies of wordlists for Shasta and Southern Pomo collected by Silver, a pre-publication draft article on Hokan botanical vocabulary, notes on Yuki grammar, and a set of slides featuring the Kashaya alphabet.
Periodically generated propagating pulses
Creators: name: Bonilla, L. L.
name: Kindelan, M.
name: Keller, J. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Certain equations with integral constraints have as solutions time-periodic pulses of a field-like unknown while a current-like unknown oscillates periodically with time. A general asymptotic theory of this phenomenon, the generalized Gunn effect, has been found recently. Here we extend this theory to the case of nonlinearities having only one stable zero, which is the case for the usual Gunn effect in n-GaAs. Our ideas are presented in the context of a simple scalar model where the waves can be constructed analytically and explicit expressions for asymptotic approximations can be found.
description: 27 pages, 11 figures, to appear in SIAM J. Appl. Math
Incentives In Primary Care and Their Impact on Potentially Avoidable Hospital Admissions
Creators: name: Fiorentini, Gianluca
name: Iezzi, Elisa
name: Bruni, Matteo Lippi
name: Ugolini, Cristina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/03 Scienza delle finanze

description: Financial incentives in primary care have been often introduced with the purpose of improving
appropriateness of care and containing demand. We usually observe pay-for-performance programs,
but alternatives have been also implemented, such as pay-for-participation in improvement
activities and pay-for-compliance with clinical guidelines. Here, we assess the influence of different
programs which ensure extra-payments to GPs, for containing episodes of avoidable
hospitalisations. Our dataset covers patients and GPs of the Italian region Emilia-Romagna for year
2005, and we control for a wide range of factors potentially influencing GPs’ behaviour. By
separating pay-for-performance from pay-for-participation and pay-for-compliance programs, we
estimate the impact on the probability of (inappropriate) hospitalisation of financial incentives
included in contracts between GPs and the NHS. As dependent variable, we consider two different
sets of conditions, for both of which timely and effective primary care should be able to limit the
need of hospital admission. The first is based on 27 medical DRGs that Emilia-Romagna identifies
as at risk of inappropriateness in primary care, while the second refers to the internationally
recognised ACSCs (ambulatory care-sensitive conditions). We show that pay-for-performance
schemes may have a significant effect over aggregate indicators of appropriateness, while the
effectiveness of pay-for-participation schemes is adequately captured only by taking into account
subpopulations affected by specific diseases. Moreover, the same incentive scheme has fairly
different effects on the two sets of indicators used, with performance improvements limited to the
target explicitly addressed by the policy maker (i.e. the list of 27 DRGs). This evidence is consistent
with the idea that a “tunnel vision” effect may occur when public authorities promote and monitor
specific sets of objectives, as proxies for more general improvements in health care practices.
Massive higher spins and holography
Creators: name: Bianchi, Massimo
name: Riccioni, Fabio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review recent progress towards the understanding of higher spin gauge symmetry breaking in AdS space from a holographic vantage point. According to the AdS/CFT correspondence, N=4 SYM theory at vanishing coupling constant should be dual to a theory in AdS which exhibits higher spin gauge symmetry enhancement. When the SYM coupling is non-zero, all but a handful of HS currents are violated by anomalies, and correspondingly local higher spin symmetry in the bulk gets spontaneously broken. In agreement with previous results and holographic expectations, we find that, barring one notable exception (spin 1 eating spin 0), the Goldstone modes responsible for HS symmetry breaking in AdS have non-vanishing mass even in the limit in which the gauge symmetry is restored. We show that spontaneous breaking a' la Stueckelberg implies that the mass of the relevant spin s'=s-1 Goldstone field is exactly the one predicted by the correspondence.
description: 8 pages, talk presented by M.B. at the "Fourth Meeting on Constrained Dynamics and Quantum gravity" held in Cala Gonone (Sardinia, Italy), September 12-16, 2005
An X-ray view of absorbed INTEGRAL AGN
Creators: name: De Rosa, A.
name: Bassani, L.
name: Ubertini, P.
name: Panessa, F.
name: Malizia, A.
name: Dean, A. J.
name: Walter, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We present a 0.2--200 keV broad-band study of absorbed AGN observed with INTEGRAL, XMM-Newton, Chandra and ASCA to investigate the continuum shape and the absorbing/reflecting medium properties. Methods. The sources are selected in the INTEGRAL AGN sample to have a 20--100 keV flux below 8$\times10^{-11}$ $\flux$ (5 mCrab), and are characterized by a 2--10 keV flux in the range (0.8--10)$\times10^{-11}$ $\flux$. The good statistics allow us a detailed study of the intrinsic and reflected continuum components. In particular, the analysis performed on the combined broad-band spectra allow us to investigate the presence of Compton reflection features and high energy cut-off in these objects. Results. The column density of the absorbing gas establishes the Compton thin nature for three sources in which a measure of the absorption was still missing. The Compton thin nature of all the sources in this small sample is also confirmed by the diagnostic ratios F$x/F[OIII]. The Compton reflection components we measure, reflection continuum and iron line, are not immediately compatible with a scenario in which the absorbing and reflecting media are one and the same, i.e. the obscuring torus. A possible solution is that the absorption is more effective than reflection, e.g. under the hypothesis that the absorbing/reflecting medium is not uniform, like a clumpy torus, or that the source is observed through a torus with a very shallow opening angle. The high energy cut-off (a lower limit in two cases) is found in all sources of our sample and the range of values is in good agreement with that found in type 1 Seyfert galaxies. At lower energies there is clear evidence of a soft component (reproduced with a thermal and/or scattering model), in six objects.
description: Accepted for publication in Astronomy and Astrophysics
Probing the Color Glass Condensate in an electron-ion collider
Creators: name: Kugeratski, M. S.
name: Goncalves, V. P.
name: Navarra, F. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Perturbative Quantum Chromodynamics (pQCD) predicts that the small-$x$ gluons in a hadron wavefunction should form a Color Glass Condensate (CGC), characterized by a saturation scale $Q_s (x, A)$ which is energy and atomic number dependent. In this paper we study the predictions of CGC physics for electron - ion collisions at high energies. We consider that the nucleus at high energies acts as an amplifier of the physics of high parton densities and estimate the nuclear structure function $F_2^A(x,Q^2)$, as well as the longitudinal and charm contributions, using a generalization for nuclear targets of the Iancu-Itakura-Munier model which describes the $ep$ HERA data quite well. Moreover, we investigate the behavior of the logarithmic slopes of the total and longitudinal structure functions in the kinematical region of the future electron - ion collider eRHIC.
description: 18 pages, 9 figures. Version to be published in the European Physical Journal C
STABILIZATION POLICIES AND AGRICULTURAL IMPACTS IN DEVELOPING COUNTRIES: THE CASE OF BOLIVIA
Creators: name: De La Barra, Victor H.
name: Marchant, Mary A.
name: Isinika, Aida C.
name: De La Barra, Victor H.
name: Marchant, Mary A.
name: Isinika, Aida C.
Publisher: name: Unknown
Year: 1995
Subjects: subject: Political Economy
subject: Bolivia
subject: Developing countries
subject: Hyperinflation
subject: Money demand
subject: Stabilization policies

description: This research examines the success of stabilization policies to control hyperinflation in Bolivia. Money demand functions for the hyperinflation and stabilization periods were econometrically estimated and statistically tested. We conclude that the demand for money in Bolivia changed after stabilization policies were implemented, indicating that the new government's objectives were met. Stabilization policies resulted in real economic growth for Bolivia's economy, including its agricultural sector, where agricultural export shares increased tenfold as stabilization policies corrected overvalued exchange rates.
Nonadiabatic Topological Energy Pumps with Quasiperiodic Driving
Creators: name: Long, David M.
name: Crowley, Philip J. D.
name: Chandran, Anushya
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive a topological classification of the steady states of $d$-dimensional lattice models driven by $D$ incommensurate tones. Mapping to a unifying $(d+D)$-dimensional localized model in frequency space reveals anomalous localized topological phases (ALTPs) with no static analog. While the formal classification is determined by $d+D$, the observable signatures of each ALTP depend on the spatial dimension $d$. For each $d$, with $d+D=3$, we identify a quantized circulating current, and corresponding topological edge states. The edge states for a driven wire ($d=1$) function as a quantized, nonadiabatic energy pump between the drives. We design concrete models of quasiperiodically driven qubits and wires that achieve ALTPs of several topological classes. Our results provide a route to experimentally access higher dimensional ALTPs in driven low-dimensional systems.
description: 6 pages, 3 figures + 13 pages, 5 figures
A further look at the 2004 reform of the operational framework of the ECB
Creators: name: Marzo, Massimiliano
name: Zagaglia, Paolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/01 Economia politica

description: This note reconsiders the impact of the reform of the operational framework of the European Central
Bank that took place in March 2004. We estimate a bivariate GARCH model with the overnight rate and
1-year swap rate, where identifying restrictions are imposed on the conditional variance. Differently from
previous studies, we use a measure of structural correlation to show that the 1-year swap segment has
decoupled from the overnight rate as the two rates do not co-vary any longer.
IMPACT OF MANAGERIAL COMMUNICATION STYLE ON EMPLOYEES’ ATTITUDES AND BEHAVIOR: THE MEDIATING ROLE OF PSYCHOLOGICAL EMPOWERMENT
Creators: name: Fuangfa AMPONSTIRA
Publisher: name: Asian Administration and Management Review
Year: 2024
Subjects: Managerial Communication Style
Psychological Empowerment
Employees’ Attitudes and Behavior

description: Asian Administration and Management Review, 7, 1, 1–12