cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: "Statua di Afrodite del tipo Medici con Eros su delfino", arte romana, inv. CVIII (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Clementi, Jessica
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
The Universal Arrow of Time II: Quantum mechanics case
Creators: name: Kupervasser, Oleg
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper is a natural continuation of our previous paper arXiv:1011.4173 . We illustrated earlier that in classical Hamilton mechanics, for overwhelming majority of real chaotic macroscopic systems, alignment of their thermodynamic time arrows occurs because of their low interaction. This fact and impossibility to observe entropy decrease at introspection explain the second law of thermodynamics. The situation in quantum mechanics is even a little bit easier: all closed systems of finite volume are periodic or nearly periodic. The proof in quantum mechanics is in many respects similar to the proof in classical Hamilton mechanics - it also uses small interaction between subsystems and impossibility to observe entropy decrease at introspection. However, there are special cases which were not found in the classical mechanics. In these cases one microstate corresponds to a set of possible macrostates (more precisely, their quantum superposition). Consideration of this property with use of decoherence theory and taking into account thermodynamic time arrows will introduce new outcomes in quantum mechanics. It allows to resolve basic paradoxes of quantum mechanics: (a) to explain the paradox of wave packet reduction at measurements when an observer is included in the system (introspection) (paradox of the Schrodinger cat); (b) to explain unobservability of superposition of macroscopic states by an external observer in real experiments (paradox of Wigner's friend); (c) to prove full equivalence of multi-world and Copenhagen interpretations of quantum mechanics; (d) to explain deviations from the exponential law at decay of particles and pass from one energy level to another (paradox of a kettle which will never begin to boil).
description: 42 pages in Enlish and in Russian
Erratum to: Exclusive photoproduction of a heavy vector meson in QCD
Creators: name: Ivanov, D. Yu.
name: Schäfer, Andreas
name: Szymanowski, L.
name: Krasnikov, G.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik

description: Projekt SCOAP3
Binomial moment equations for stochastic reaction systems
Creators: name: Barzel, Baruch
name: Biham, Ofer
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A highly efficient formulation of moment equations for stochastic reaction networks is introduced. It is based on a set of binomial moments that capture the combinatorics of the reaction processes. The resulting set of equations can be easily runcated to include moments up to any desired order. The number of equations is dramatically reduced compared to the master equation. This formulation enables the simulation of complex reaction networks, involving a large number of reactive species much beyond the feasibility limit of any existing method. It provides an equation-based paradigm to the analysis of stochastic networks, complementing the commonly used Monte Carlo simulations.
description: 3 figures
The renormalon diagram in gauge theories on R3×S1
Creators: name: Sulejmanpasic, Tin
name: Anber, Mohamed M.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Solitons Monopoles and Instantons, Nonperturbative Effects, Renormalization Regularization and Renormalons
subject: 530 Physik

description: We analyze the renormalon diagram of gauge theories on R3×S1. In particular, we perform exact one loop calculations for the vacuum polarization in QCD with adjoint matter and observe that all infrared logarithms, as functions of the external momentum, cancel between the vacuum part and finite volume part, which eliminates the IR renormalon problem. We argue that the singularities in the Borel plane, arising from the topological neutral bions, are not associated with the renormalon diagram, but with the proliferation of the Feynman diagrams. As a byproduct, we obtain, for the first time, an exact one-loop result of the vacuum polarization which can be adapted to the case of thermal compactification of QCD.
description: Projekt SCOAP3
On the different approaches of measuring uncertainty shocks
Creators: name: Strobel, Johannes
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Uncertainty shocks; Sectoral impact; GARCH-in-mean; Profit growth
subject: 330 Wirtschaft
subject: E3

description: As uncertainty has become an increasingly prominent source of business cycle fluctuations, various uncertainty proxies have been proposed in the literature. This paper shows that uncertainty measures based on realized variables fluctuate more than the measures that are based on forecasts. More precisely, the variation in the realized cross-sectional standard deviation of profit growth and stock returns is larger than the variation in the forecast standard deviation. Moreover, the forecast standard deviation of profit growth and stock returns are negatively or uncorrelated, the uncertainty measures increase stock returns due to a risk premium, but they decrease profit growth.
Language Colonization and English Hybridization: The Use of Irish English Lexis in Twentieth Century Irish Drama
Creators: name: Luppi, Fabio
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

Irish English, albeit a variant of the language of the colonizer, can be considered an important identitarian element in twentieth century Irish literature. By taking into account Irish English terms in a selection of Anglo-Irish plays (with particular focus on the titles), this paper examines the lexical choices that contribute to rendering cultural, geographical and political meanings – some of which are derogatory, patronizing and pejorative. The conclusion, with reference to Brian Friel’s Translations, reflects on the implications of the dominance of English in Ireland following its replacement of Irish Gaelic. The various loanwords and calques from Irish Gaelic found in these plays thus acquire a cultural and political significance that is specific to the Irish context.

description: Il Tolomeo
Pest panic in the American West : the San Jose scale as change agent in American agriculture, 1880-1900
Creators: name: Blatchford, Barrie Ryne
Publisher: name: University of British Columbia
Year: 2017

description: The San Jose scale – a miniature, armoured, sap-sucking insect which preys promiscuously on all manner of deciduous fruit trees - became one of a host of accidentally-introduced bugs to plague American agriculture in the late nineteenth century, particularly in the West. However, despite its significant repercussions and contemporary prominence, scholars have relegated the scale to passing asides in studies of invasive species, American agriculture, and economic entomology. As such, it has little modern-day popular notoriety nor has it engendered the scholarly attention devoted to other contemporary pests like the boll weevil or gypsy moth. Yet the San Jose scale was a formidable change agent in Western agriculture, and also nationally. Its ravages stimulated the development and expansion of agricultural bureaucracies more than any other single insect, while also sparking numerous quarantine and inspection laws at both the state and national level. Meanwhile, the fecundity and tenacity of the scale forced technological innovation, driving entomologists, inspectors, and agriculturalists to pursue chemical solutions. Thus the scale played a key role in making pesticides hegemonic in American agriculture beginning in the 1890s, and also in the growth of government characteristic of the era. That said, the efforts of officialdom to promote pesticides against the scale ran into opposition throughout the West. I explore this backlash to illuminate both the early history of systemic pesticide use as well as its discontents, subjects which remain understudied. Moreover, the turmoil the scale caused - costing Western farmers millions of dollars in ruined produce, dead trees, and the expense of spraying their orchards – and the apocalyptic, fear-mongering language in which contemporaries discussed it, offers a lens into contemporary mores about nature, suggesting that nineteenth-century Americans understood nature as vulnerable, not endlessly bountiful. Finally, the scale’s depredations pushed some to question the promise of the West as the “Garden of the World,” and the system of industrial capitalism which opened up far-flung markets but also introduced exotic insects. In all this, the rhetoric about the scale serves as a vivid reminder of what Ann Stoler has called the “epistemic anxieties” at the heart of colonial enterprises.
Spitzer Analysis of HII Region Complexes in the Magellanic Clouds: Determining a Suitable Monochromatic Obscured Star Formation Indicator
Creators: name: Lawton, Brandon
name: Gordon, Karl D.
name: Babler, Brian
name: Block, Miwa
name: Bolatto, Alberto D.
name: Bracker, Steve
name: Carlson, Lynn R.
name: Engelbracht, Charles W.
name: Hora, Joseph L.
name: Indebetouw, Remy
name: Madden, Suzanne C.
name: Meade, Marilyn
name: Meixner, Margaret
name: Misselt, Karl
name: Oey, M. S.
name: Oliveira, Joana M.
name: Robitaille, Thomas
name: Sewilo, Marta
name: Shiao, Bernie
name: Vijh, Uma P.
name: Whitney, Barbara
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: HII regions are the birth places of stars, and as such they provide the best measure of current star formation rates (SFRs) in galaxies. The close proximity of the Magellanic Clouds allows us to probe the nature of these star forming regions at small spatial scales. We aim to determine the monochromatic IR band that most accurately traces the bolometric IR flux (TIR), which can then be used to estimate an obscured SFR. We present the spatial analysis, via aperture/annulus photometry, of 16 LMC and 16 SMC HII region complexes using the Spitzer IRAC and MIPS bands. UV rocket data and SHASSA H-alpha data are also included. We find that nearly all of the LMC and SMC HII region SEDs peak around 70um, from ~10 to ~400 pc from the central sources. As a result, the sizes of HII regions as probed by 70um is approximately equal to the sizes as probed by TIR (about 70 pc in radius); the radial profile of the 70um flux, normalized by TIR, is constant at all radii (70um ~ 0.45 TIR); the 1-sigma standard deviation of the 70um fluxes, normalized by TIR, is a lower fraction of the mean (0.05 to 0.12 out to ~220 pc) than the normalized 8, 24, and 160um normalized fluxes (0.12 to 0.52); and these results are invariant between the LMC and SMC. From these results, we argue that 70um is the most suitable IR band to use as a monochromatic obscured star formation indicator because it most accurately reproduces the TIR of HII regions in the LMC and SMC and over large spatial scales. We also explore the general trends of the 8, 24, 70, and 160um bands in the LMC and SMC HII region SEDs, radial surface brightness profiles, sizes, and normalized (by TIR) radial flux profiles. We derive an obscured SFR equation that is modified from the literature to use 70um luminosity, SFR(Mo/yr) = 9.7(0.7)x10^{-44} L(70)(ergs/s), which is applicable from 10 to 300 pc distance from the center of an HII region.
description: 21 pages, 12 figures, 4 tables. Will be published in ApJ.
Probing Charges on the Atomic Scale by Means of Atomic Force Microscopy
Creators: name: Albrecht, F.
name: Repp, Jascha
name: Fleischmann, M.
name: Scheer, M.
name: Ondráček, M.
name: Jelínek, P.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik
subject: 540 Chemie

description: Kelvin probe force spectroscopy was used to characterize the charge distribution of individual molecules with polar bonds. Whereas this technique represents the charge distribution with moderate resolution for large tip-molecule separations, it fails for short distances. Here, we introduce a novel local force spectroscopy technique which allows one to better disentangle electrostatic from other contributions in the force signal. It enables one to obtain charge-related maps at even closer tip-sample distances, where the lateral resolution is further enhanced. This enhanced resolution allows one to resolve contrast variations along individual polar bonds.
Differential Harnack inequalities for nonlinear heat equations with potentials under the Ricci flow
Creators: name: Wu, Jia-Yong
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C44 (Primary)

description: We prove several differential Harnack inequalities for positive solutions to nonlinear backward heat equations with different potentials coupled with the Ricci flow. We also derive an interpolated Harnack inequality for the nonlinear heat equation under the $\varepsilon$-Ricci flow on a closed surface. These new Harnack inequalities extend the previous differential Harnack inequalities for linear heat equations with potentials under the Ricci flow.
description: 17 pages. New explanations added; Final version
Multiple Convergent Origins of Workerlessness and Inbreeding in the Socially Parasitic Ant Genus Myrmoxenus
Creators: name: Heinze, Jürgen
name: Buschinger, Alfred
name: Pöttinger, Theo
name: Suefuji, Masaki
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: The socially parasitic ant genus Myrmoxenus varies strongly in fundamental life history traits, such as queen-worker ratio, the timing of sexual production, and mating behavior. Myrmoxenus queens generally take over nests of emnothorax ants, kill the resident queen by throttling, and force the workers to take care of the social parasite’s brood. Young queens of M. ravouxi and other species produce large numbers of workers, which during “slaveraids” pillage host pupae from neighboring Temnothorax colonies to increase the workforce in their own nests. Other species, such as M. corsicus, have lost caste polyphenism and rear only male and female sexual offspring. Using sequences of the genes CO I / CO II and wingless we reconstruct the phylogeny of Myrmoxenus and document that the worker caste was lost convergently at least three times. Furthermore, mating in the nest and inbreeding obviously also evolved in parallel from ancestors whose sexuals presumably mated during nuptial flights. Myrmoxenus might thus provide a suitable model to investigate caste differentiation and the plasticity of mating behavior in Hymenoptera.
Noise-induced Synchronization in Small World Network of Phase Oscillators
Creators: name: Esfahani, Reihaneh Kouhi
name: Shahbazi, Farhad
name: Samani, Keivan Aghababaei
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A small-world network (SW) of similar phase oscillators, interacting according to the Kuramoto model is studied numerically. It is shown that deterministic Kuramoto dynamics on the SW networks has various stable stationary states. This can be attributed to the "defect patterns" in a SW network which is inherited to it from deformation of "helical patterns" in its parent regular one. Turning on an uncorrelated random force, causes the vanishing of the defect patterns, hence increasing the synchronization among oscillators for intermediate noise intensities. This phenomenon which is called "stochastic synchronization" generally observed in some natural networks like brain neuronal network.
description: 6 pages
Associated Press-NORC Center for Public Affairs Research Poll: Americans’ Assessments of Their Increasingly Automated Lives
Creators: name: Research, The Associated Press-NORC Center For Public Affairs
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: Automation of daily activities and workplace tasks will make quality of life better/worse over next ten years (1); respondent quick/slow to use new technologies (1); job automation has helped/hurt American workers (1); effects of increased automation in factories (7); frequency with which respondent uses various technologies (10); shopping online vs. in store (4); impact of technological developments in next ten years (6); automation use in respondent's workplace (1); confidence in availability of affordable training for new work if job lost due to automation (1); prefers to interact with person/self-service device in various situations (5).
Feasibility study of using Cross-Laminated Timber core for the UBC Tall Wood Building
Creators: name: Moudgil, Manu
Publisher: name: University of British Columbia
Year: 2017

description: Mass-timber has gained popularity in the construction of mid-rise buildings in the last decade. The innovation of constructing tall buildings with mass-timber can be seen in the student residence at Brock Commons built in 2016 at the University of British Columbia. It is the world’s tallest timber hybrid building with 18 stories and 53 meters’ height above the ground level. The building has 17 stories of mass-timber superstructure resting on a concrete podium with two concrete cores that act as a lateral force resisting system for earthquake and wind forces. The mass-timber superstructure of 17 stories took ten weeks whereas the concrete cores were built in fourteen weeks. There could have been a substantial reduction in the project timeline leading to cost savings, if mass-timber was used for the cores. The motivation for concrete cores was driven by the sole purpose of easier approval procedure. The objective of this thesis was to evaluate the possibility to design the Brock Commons building using mass-timber cores. First, the procedure for the approvals for tall timber buildings by understanding the code compliance for Brock Commons is discussed. Then, the actual building with concrete cores is modeled, with the model being calibrated with the results from the structural engineers of record. These concrete cores are then replaced by the same configuration using Cross Laminated Timber (CLT) cores to investigate the structural feasibility of Brock Commons with a mass-timber core. The results presented herein show that Brock Commons with CLT core having the same dimensions and configuration is unstable under seismic loading for Vancouver, BC, as specified by National Building of Canada 2015. However, when the configuration and thickness of CLT cores are changed, the structure can meet the seismic performance criteria as per the code.
A smooth entropy approach to quantum hypothesis testing and the classical capacity of quantum channels
Creators: name: Datta, Nilanjana
name: Mosonyi, Milan
name: Hsieh, Min-Hsiu
name: Brandao, Fernando G. S. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use the smooth entropy approach to treat the problems of binary quantum hypothesis testing and the transmission of classical information through a quantum channel. We provide lower and upper bounds on the optimal type II error of quantum hypothesis testing in terms of the smooth max-relative entropy of the two states representing the two hypotheses. Using then a relative entropy version of the Quantum Asymptotic Equipartition Property (QAEP), we can recover the strong converse rate of the i.i.d. hypothesis testing problem in the asymptotics. On the other hand, combining Stein's lemma with our bounds, we obtain a stronger ($\ep$-independent) version of the relative entropy-QAEP. Similarly, we provide bounds on the one-shot $\ep$-error classical capacity of a quantum channel in terms of a smooth max-relative entropy variant of its Holevo capacity. Using these bounds and the $\ep$-independent version of the relative entropy-QAEP, we can recover both the Holevo-Schumacher-Westmoreland theorem about the optimal direct rate of a memoryless quantum channel with product state encoding, as well as its strong converse counterpart.
description: v4: Title changed, improved bounds, both direct and strong converse rates are covered, a new Discussion section added. 20 pages
No priming for global motion in crowding
Creators: name: Pavan, Andrea
name: Gallenberger, Martin G.
name: Manassi, Mauro
name: Greenlee, Mark W.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 150 Psychologie

description: There is psychophysical evidence that low-level priming, e.g., from oriented gratings, as well as high-level semantic priming, survives crowding. We investigated priming for global translational motion in crowded and noncrowded conditions. The results indicated that reliable motion priming occurs in the noncrowded condition, but motion priming does not survive crowding. Crowding persisted despite variations in the direction of the flankers with respect to the prime's direction. Motion priming was still absent under crowding when 85% of the flankers moved in the same direction as the prime. Crowding also persisted despite variations in the speed of the flankers relative to the prime even when the flankers' speed was four times slower than the speed of the prime. However, a priming effect was evident when the prime's spatial location was precued and its distance to the flankers increased, suggesting a release from crowding. These results suggest that transient attention induced by precueing the spatial location of the prime may improve subjects' ability to discriminate its direction. Spatial cueing could act to decrease the integration field, thereby diminishing the influence of nearby distracters. In an additional experiment in which we used fewer flankers, we found a priming effect under conditions in which the interelement distance varied between flankers and prime. Overall, the results suggest that motion priming is strongly affected by crowding, but transient attention can partially retrieve such facilitation.
Stability and dynamical properties of Rosenau-Hyman compactons using Pade approximants
Creators: name: Mihaila, Bogdan
name: Cardenas, Andres
name: Cooper, Fred
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2010
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a systematic approach for calculating higher-order derivatives of smooth functions on a uniform grid using Padé approximants. We illustrate our findings by deriving higher-order approximations using traditional second-order finite-differences formulas as our starting point. We employ these schemes to study the stability and dynamical properties of K(2,2) Rosenau-Hyman (RH) compactons including the collision of two compactons and resultant shock formation. Our approach uses a differencing scheme involving only nearest and next-to-nearest neighbors on a uniform spatial grid. The partial differential equation for the compactons involves first, second and third partial derivatives in the spatial coordinate and we concentrate on four different fourth-order methods which differ in the possibility of increasing the degree of accuracy (or not) of one of the spatial derivatives to sixth order. A method designed to reduce roundoff errors was found to be the most accurate approximation in stability studies of single solitary waves, even though all derivates are accurate only to fourth order. Simulating compacton scattering requires the addition of fourth derivatives related to artificial viscosity. For those problems the different choices lead to different amounts of "spurious" radiation and we compare the virtues of the different choices.
description: 12 figures
Studies of Transverse Momentum Dependent Parton Distributions and Bessel Weighting
Creators: name: Aghasyan, M.
name: Avakian, H.
name: De Sanctis, E.
name: Gamberg, L.
name: Mirazita, M.
name: Musch, B.
name: Prokudin, A.
name: Rossi, P.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Deep Inelastic Scattering; Parton Model; QCD
subject: 530 Physik

description: In this paper we present a new technique for analysis of transverse momentum dependent parton distribution functions, based on the Bessel weighting formalism. The procedure is applied to studies of the double longitudinal spin asymmetry in semi-inclusive deep inelastic scattering using a new dedicated Monte Carlo generator which includes quark intrinsic transverse momentum within the generalized parton model. Using a fully differential cross section for the process, the effect of four momentum conservation is analyzed using various input models for transverse momentum distributions and fragmentation functions. We observe a few percent systematic offset of the Bessel-weighted asymmetry obtained from Monte Carlo extraction compared to input model calculations, which is due to the limitations imposed by the energy and momentum conservation at the given energy/ Q 2 . We find that the Bessel weighting technique provides a powerful and reliable tool to study the Fourier transform of TMDs with controlled systematics due to experimental acceptances and resolutions with different TMD model inputs.
description: Projekt SCOAP3
Spin Hall effects due to phonon skew scattering
Creators: name: Gorini, Cosimo
name: Eckern, Ulrich
name: Raimondi, Roberto
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik

description: A diversity of spin Hall effects in metallic systems is known to rely on Mott skew scattering. In this work its high-temperature counterpart, phonon skew scattering, which is expected to be of foremost experimental relevance, is investigated. In particular, the phonon skew scattering spin Hall conductivity is found to be practically T independent for temperatures above the Debye temperature TD. As a consequence, in Rashba-like systems a high-T linear behavior of the spin Hall angle demonstrates the dominance of extrinsic spin-orbit scattering only if the intrinsic spin splitting is smaller than the temperature.
Transport and capture properties of Auger-generated high-energy carriers in (AllnGa)N Quantum well structures
Creators: name: Nirschl, A.
name: Binder, M.
name: Schmid, M.
name: Karow, M. M.
name: Pietzonka, I.
name: Lugauer, H.-J.
name: Zeisel, R.
name: Bougeard, Dominique
name: Galler, B.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik

description: Recent photoluminescence experiments presented by M. Binder et al. [Appl. Phys. Lett. 103, 071108 (2013)] demonstrated the visualization of high-energy carriers generated by Auger recombination in (AlInGa)N multi quantum wells. Two fundamental limitations were deduced which reduce the detection efficiency of Auger processes contributing to the reduction in internal quantum efficiency: the transfer probability of these hot electrons and holes in a detection well and the asymmetry in type of Auger recombination. We investigate the transport and capture properties of these high-energy carriers regarding polarization fields, the transfer distance to the generating well, and the number of detection wells. All three factors are shown to have a noticeable impact on the detection of these hot particles. Furthermore, the investigations support the finding that electron-electron-hole exceeds electron-hole-hole Auger recombination if the densities of both carrier types are similar. Overall, the results add to the evidence that Auger processes play an important role in the reduction of efficiency in (AlInGa)N based LEDs.
Thesis Artifacts for: Benchmarking Scalability of Load Generator Tools
Creators: name: Konkel, Christopher
Publisher: name: Zenodo
Year: 2023

description:   Thesis Artifacts for: Benchmarking Scalability of Load Generator Tools A detailed description can be found in the README.md. The corressponding thesis can be found here. Abstract Scalability is one of the most important quality characteristics of modern day applications. It is a non-trivial effort to predict performance changes and scaling capabilities of complex systems under increasing load. As a solution, a wide variety of load generator tools can be used to simulate high amounts of load on a system under test. But in a testing environment with limited hardware resources, the system under test is not the only component of interest in terms of system resource requirements, as load generator tools can also require significant amounts of hardware resources. Theodolite, a framework for benchmarking horizontal and vertical scalability of cloud-native applications, also uses a load generator for its benchmarking process. In this thesis, we compare the vertical scalability of the custom load generator used by Theodolite to the three load generator tools k6, Gatling and JMeter using Theodolite benchmarking methodology. We evaluate the tools based on the niche use case of the custom load generator, simulating input of collected sensory data. We evaluate the HTTP and Kafka load format. To achieve this, we first configure the three tools to match the selected use case in both load formats and then integrate them into the Theodolite environment. Second, we define new benchmarks for Theodolite to use the selected load generators in its benchmarking process. Third, we execute the newly defined benchmarks and evaluate the results of the experiments. We find significant differences regarding the vertical scalability of the selected tools, with scalability differences of the same tool depending on the load format.
Hot Jupiter Magnetospheres
Creators: name: Trammell, George B.
name: Arras, Phil
name: Li, Zhi-Yun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: (Abridged) The upper atmospheres of close-in gas giant exoplanets are subjected to intense heating/tidal forces from their parent stars. Atomic/ionized hydrogen (H) layers are sufficiently rarefied that magnetic pressure may dominate gas pressure for expected planetary magnetic field strength. We examine the magnetospheric structure using a 3D isothermal magnetohydrodynamic model that includes: a static "dead zone" near the magnetic equator containing magnetically confined gas; a "wind zone" outside the magnetic equator in which thermal pressure gradients and the magneto-centrifugal-tidal effect give rise to transonic outflow; and a region near the poles where sufficiently strong tidal forces may suppress transonic outflow. Using dipole field geometry, we estimate the size of the dead zone to be ~1-10 planetary radii for a range of parameters. To understand appropriate base conditions for the 3D isothermal model, we compute a 1D thermal model in which photoelectric heating from the stellar Lyman continuum is balanced by collisionally-excited Lyman α cooling. This 1D model exhibits a H layer with temperatures T=5000-10000K down to pressures of 10-100 nbar. Using the 3D isothermal model, we compute H column densities and Lyman α transmission spectra for parameters appropriate to HD 209458b. Line-integrated transit depths of 5-10% can be achieved for the above base conditions. Strong magnetic fields increase the transit signal while decreasing the mass loss, due to higher covering fraction and density of the dead zone. In our model, most of the transit signal arises from magnetically confined gas, some of which may be outside the L1 equipotential. Hence the presence of gas outside the L1 equipotential does not directly imply mass loss. Lastly, we discuss the domain of applicability for the magnetic wind model described in this paper and in the Roche-lobe overflow model.
description: 26 pages, 17 figures (5 color), 2 appendices; submitted to ApJ; higher resolution version available at http://www.astro.virginia.edu/~gbt8f/HotJupMag_fullres_astroph.pdf
Photothermoelectric and Photoelectric Contributions to Light Detection in Metal–Graphene–Metal Photodetectors
Creators: name: Echtermeyer, T. J.
name: Nene, P. S.
name: Trushin, M.
name: Gorbachev, R. V.
name: Eiden, A. L.
name: Milana, S.
name: Sun, Z.
name: Schliemann, John
name: Lidorikis, E.
name: Novoselov, K. S.
name: Ferrari, A. C.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Graphene, photodetectors, Raman spectroscopy, photoresponse, optoelectronics
subject: 530 Physik

description: Graphene’s high mobility and Fermi velocity, combined with its constant light absorption in the visible to far-infrared range, make it an ideal material to fabricate high-speed and ultrabroadband photodetectors. However, the precise mechanism of photodetection is still debated. Here, we report wavelength and polarization-dependent measurements of metal−graphene−metal photodetectors. This allows us to quantify and control the relative contributions of both photothermo- and photoelectric effects, both adding to the overall photoresponse. This paves the way for a more efficient photodetector design for ultrafast operating speeds.
description: PMID: 24884339
Transport theory of superconductors with singular interaction corrections
Creators: name: Levchenko, Alex
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study effects of strong fluctuations on the transport properties of superconductors near the classical critical point. In this regime conductivity is set by the delicate interplay of two competing effects. The first is that strong electron-electron interactions in the Cooper channel increase the life-time of fluctuation Cooper pairs and thus enhance conductivity. On the other hand, quantum pair-breaking effects tend to suppress superconductivity. An interplay between these processes defines new regime where fluctuation induced transport becomes more singular. The most singular contributions to the conductivity stem from the dynamic Aslamazov-Larkin term, and novel Maki-Thompson and interference corrections. The crossover temperature from weakly to strongly fluctuating regime is generated self-consistently as the result of scattering on dynamic variations of the order parameter. We suggest that the way to probe nonlinear-fluctuations in superconductors is by magnetoconductivity measurements in the perpendicular field.
description: 4+ pages, 3 figures
Sandra Federici. L'entrance des auteurs africains dans le champ de la bande dessinée européenne de la langue française: (1978-2016)
Creators: name: Scarsella, Alessandro
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

Federici, S. (2019). L’entrance des auteurs africains dans le champ de la bande dessinée européenne de la langue française (1978-2016). Paris : L’Harmattan, 2019, 353 pp.

description: Il Tolomeo
Interplay between spin-orbit interactions and a time-dependent electromagnetic field in monolayer graphene
Creators: name: Scholz, Andreas
name: López, Alexander
name: Schliemann, John
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: We apply a circularly and linearly polarized terahertz field on a monolayer of graphene, taking into account spin-orbit interactions of the intrinsic and Rashba types. It turns out that the field can be used not only to induce a gap in the energy spectrum, but also to close an existing gap due to the different reaction of the spin components with circularly polarized light. Signatures of spin-orbit coupling in the density of states of the driven system can be observed even for energies where the static density of states is independent of spin-orbit interactions. Furthermore it is shown that the time evolution of the spin polarization and the orbital dynamics of an initial wave packet can be modulated by varying the ratio of the spin-orbit-coupling parameters. Assuming that the system acquires a quasistationary state, the optical conductivity of the irradiated sample is calculated. Our results confirm the multistep nature of the conductivity obtained recently, where the number of intermediate steps can be changed by adjusting the spin-orbit-coupling parameters and the orientation of the field.
Vibrational properties of graphene fluoride and graphane
Creators: name: Peelaers, H.
name: Hernández-Nieves, A. D.
name: Leenaerts, O.
name: Partoens, B.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The vibrational properties of graphene fluoride and graphane are studied using ab initio calculations. We find that both sp3 bonded derivatives of graphene have different phonon dispersion relations and phonon density of states as expected from the different masses associated with the attached atoms fluorine and hydrogen, respectively. These differences manifest themselves in the predicted temperature behavior of the constant-volume specific heat of both compounds.
description: 3 pages, 3 figures, submitted
Anisotropic optical properties of Fe/GaAs(001) nanolayers from first principles
Creators: name: Putz, Sebastian
name: Gmitra, Martin
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: 530 Physik

description: We investigate the anisotropy of the optical properties of thin Fe films on GaAs(001) from first-principles calculations. Both intrinsic and magnetization-induced anisotropy are covered by studying the system in the presence of spin-orbit coupling and external magnetic fields. We use the linearized augmented plane wave method, as implemented in the wien2k density functional theory code, to show that the C2v symmetric anisotropy of the spin-orbit coupling fields at the Fe/GaAs(001) interface manifests itself in the corresponding anisotropy of the optical conductivity and the polar magneto-optical Kerr effect. While their magnetization-induced anisotropy is negligible, the intrinsic anisotropy of the optical properties is significant and reflects the underlying C2v symmetry of the Fe/GaAs(001) interface. This suggests that the effects of anisotropic spin-orbit coupling fields in experimentally relevant Fe/GaAs(001) slabs can be studied by purely optical means.
Luigi Gaffuri. Racconto del territorio africano
Creators: name: Boraso, Silvia
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

Gaffuri, L. (2018). Racconto del territorio africano. Letterature per una geografia. Milano: Lupetti, 318 pp.

description: Il Tolomeo
Langue française et arts du spectacle à Montréal : aperçu de deux parcours biographiques
Creators: name: Brancaglion, Cristina
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

In 2018 the biographies of two women who have shaped and animated the city's theatrical life since the 1930s were published in Montréal: one, Madame Jean-Louis Audet, dedicating herself to the training of actors through her diction courses, the other, Monique Miller, playing key roles in the Montreal and the international theatre scene. The paths of the two women are outlined in two volumes – signed respectively by Muriel Gold and Pierre Audet – rich in iconographic documents that allow to relive some important episodes of Québec's sociolinguistic and cultural history. The aim of this contribution is to highlight how the two writings can be useful sources for the study of some of the changes that marked the advent of the ‘Révolution tranquille’: the first signs of women's emancipation, the emergence of Québec's cultural production, the advent of television and its correlations with the other performing arts (theater, radio, cinema), the role of some actors in Québec's linguistic, ideological and artistic evolution

description: Il Tolomeo
Origin of Cu-PGE-rich sulphide mineralization in the DJ/DB zone of the Turnagain Alaskan-type intrusion, British Columbia
Creators: name: Jackson-Brown, Sarah
Publisher: name: University of British Columbia
Year: 2017

description: The Early Jurassic (>188-185 Ma) Turnagain ultramafic-mafic body, a composite Alaskan-type intrusion in the Northern Cordillera of northern British Columbia, hosts a significant nickel-cobalt resource (Horsetrail zone, 1842 Mt @ 0.21 wt. % Ni and 0.013 wt. % Co), and minor copper-platinum group element (Cu-PGE) mineralization. The 24 km² Turnagain intrusion comprises four temporally, spatially, and chemically distinct ultramafic-mafic phases that include dunite, wehrlite, clinopyroxenite, hornblendite and diorite. The 1.5 x 2 km DJ/DB zone, an area of Cu-PGE enrichment that was discovered through soil geochemistry and drilling of a previously under-explored area of the intrusion, is located 2.5 km northwest of the nickel resource. Clinopyroxenites and hornblendites with minor wehrlite are the major rock types of the DJ/DB zone. Orthomagmatic sulphide mineralization ranges from predominantly disseminated sulphides (<5 vol. %) to rare massive ores, and contains chalcopyrite and pyrrhotite, with minor pyrite and pentlandite, and trace arsenides (nickeline), arsenic-antimony sulphides (cobaltite, gersdorffite), and platinum group minerals (PGM; sperrylite, sudburyite, Pd-melonite, testibiopalladite). Sulphide and PGM mineralization underwent minor remobilization related to post-magmatic hydrothermal alteration. The DJ/DB zone represents the products of a magmatic event that is younger than the magmatism that produced the Ni-Co-rich mineralization. Sulphide saturation of Mg-rich arc parent magmas through assimilation of sulphur and carbon from pyrite- and graphite-bearing metasedimentary rocks surrounding the intrusion lead to the formation of the DJ/DB zone following extensive olivine fractionation (i.e., Ni depletion). The distinct nature of Cu-PGE mineralization in the DJ/DB zone indicates that Ni-Cu-PGE sulphides in Alaskan-type intrusions may have more significant exploration potential in convergent margins than previously considered.
title: "Statua di fanciullo con due anatre", arte romana, inv. CX (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Ciccarello, Giulia
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
Towards designing robust coupled networks
Creators: name: Schneider, Christian M.
name: Yazdani, Nuri
name: Araujo, Nuno A. M.
name: Havlin, Shlomo
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Natural and technological interdependent systems have been shown to be highly vulnerable due to cascading failures and an abrupt collapse of global connectivity under initial failure. Mitigating the risk by partial disconnection endangers their functionality. Here we propose a systematic strategy of selecting a minimum number of autonomous nodes that guarantee a smooth transition in robustness. Our method which is based on betweenness is tested on various examples including the famous 2003 electrical blackout of Italy. We show that, with this strategy, the necessary number of autonomous nodes can be reduced by a factor of five compared to a random choice. We also find that the transition to abrupt collapse follows tricritical scaling characterized by a set of exponents which is independent on the protection strategy.
Francis-Joachim Roy. Les chiens
Creators: name: Boraso, Silvia
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

Roy, F.J. (2019). Les chiens. Montreuil : Le Temps des Cerises éditions, 232 pp.

description: Il Tolomeo
Universal absorption of two-dimensional systems
Creators: name: Stauber, T.
name: Noriega-Pérez, D.
name: Schliemann, John
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik

description: We discuss the optical conductivity of several noninteracting two-dimensional semiconducting systems focusing on gapped Dirac and Schrödinger fermions as well as on a system mixing these two types. Close to the band gap, we can define a universal optical conductivity quantum of σ0=116e2ℏ for the pure systems. The effective optical conductivity then depends on the degeneracy factors gs (spin) and gv (valley) and on the curvature around the band gap ν, i.e., it generally reads σ=gsgvνσ0. For a system composed of both types of carriers, the optical conductivity becomes nonuniversal.
Daniel-Henri Pageaux. Lectures Indiaocéanes. Essais sur les francophonies de l’Océan Indien
Creators: name: Pagone, Sara
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2020

description:

Pageaux, D.-H. (2016). Lectures Indiaocéanes. Essais sur les francophonies de l’Océan Indien. Paris : Maisonneuve, 349 pp. Itinéraires poétiques, Itinéraires critiques 51.

description: Il Tolomeo
Quasi-degenerate neutrinos in SO(10)
Creators: name: Joshipura, Anjan S.
name: Patel, Ketan M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quark lepton universality inherent in grand unified theories based on $SO(10)$ gauge group generically leads to hierarchical neutrino masses. We propose a specific ansatz for the structure of Yukawa matrices in $SO(10)$ models which differ from this generic expectations and lead to quasi degenerate neutrinos through the type-I seesaw mechanism. Consistency of this ansatz is demonstrated through a detailed fits to fermion masses and mixing angles all of which can be explained with reasonable accuracy in a model which uses the Higgs fields transforming as $10,120$ and $\overline{126}$ representations of $SO(10)$. The proposed ansatz is shown to follow from an extended model based on the three generations of the vector like fermions and an $O(3)$ flavour symmetry. Successful numerical fits are also discussed in earlier proposed models which used combination of the type-I and type-II seesaw mechanisms for obtaining quasi degenerate neutrinos. Large neutrino mixing angles emerge as a consequence of neutrino mass degeneracy in both these cases.
description: 12 pages