cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Improved Integrality Gap in Max–Min Allocation, or, Topology at the North Pole
Creators: name: Haxell, Penny
name: Szabó, Tibor
Publisher: name: Freie Universität Berlin
Year: 2025
Subjects: subject: Max-min allocation
subject: Integrality gap
subject: Topological methods
subject: Hypergraph matching
classificationCode: 510
subject: Mathematik

description: In the max–min allocation problem a set P of players are to be allocated disjoint subsets of a set R of indivisible resources, such that the minimum utility among all players is maximized. We study the restricted variant, also known as the Santa Claus problem, where each resource has an intrinsic positive value, and each player covets a subset of the resources.Bezáková and Dani (SIGecom Exch 5(3):11–18, 2005) showed that this problem is NP-hard to approximate within a factor less than 2, consequently a great deal of work has focused on approximate solutions. The principal approach for obtaining approximation algorithms has been via the Configuration LP (CLP) of Bansal and Sviridenko (Proceedings of the 38th ACMSymposium on Theory of Computing, 2006). Accordingly, there has been much interest in bounding the integrality gap of this CLP. The existing algorithms and integrality gap estimations are all based one way or another on the combinatorial augmenting tree argument of Haxell (Graphs Comb 11(3):245–248, 1995) for finding perfect matchings in certain hypergraphs. Our main innovation in this paper is to introduce the use of topological methods, to replace the combinatorial argument of Haxell (Graphs Comb 11(3):245–248, 1995) for the restricted max–min allocation problem. This approach yields substantial improvements in the integrality gap of the CLP. In particular we improve the previously best known bound of 3.808 to 3.534. We also study the (1, ε)-restricted version, in which resources can take only two values, and improve the integrality gap in most cases. Our approach applies a criterion of Aharoni and Haxell, and Meshulam, for the existence of independent transversals in graphs, which involves the connectedness of the independence complex. This is complemented by a graph process of Meshulam that decreases the connectedness of the independence complex in a controlled fashion and hence, tailored appropriately to the problem, can verify the criterion. In our applications we aim to establish the flexibility of the approach and hence argue for it to be a potential asset in other optimization problems involving hypergraph matchings.
Divulgação científica sob a perspectiva da Ciência Aberta
Creators: name: Pedri, Patricia
name: Ferreira de Araújo, Ronaldo
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Comunicação III, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
Dimensionality Reduction and Anomaly Detection for CPPS Data using Autoencoder
Creators: name: Eiteneuer, Benedikt
name: Hranisavljevic, Nemanja
name: Niggemann, Oliver
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Unsupervised anomaly detection (AD) is a major topic in the field of Cyber-Physical Production Systems (CPPSs). A closely related concern is dimensionality reduction (DR) which is: 1) often used as a preprocessing step in an AD solution, 2) a sort of AD, if a measure of observation conformity to the learned data manifold is provided. We argue that the two aspects can be complementary in a CPPS anomaly detection solution. In this work, we focus on the nonlinear autoencoder (AE) as a DR/AD approach. The contribution of this work is: 1) we examine the suitability of AE reconstruction error as an AD decision criterion in CPPS data. 2) we analyze its relation to a potential second-phase AD approach in the AE latent space 3) we evaluate the performance of the approach on three real-world datasets. Moreover, the approach outperforms state-of-the-art techniques, alongside a relatively simple and straightforward application.
description: Copyright IEEE 2019
title: A Mechanistic Look at the Amphibolitization of Mafic Crust: Insights From the Kråkeneset Gabbro Body, Western Gneiss Region, Norway
Creators: name: Grund, Saskia
name: John, Timm
name: Vrijmoed, Johannes C.
name: Austrheim, Håkon
name: Andersen, Torgeir B.
Publisher: name: Freie Universität Berlin
Year: 2025
Subjects: subject: amphibolitization
subject: densification
subject: fluid–rock interaction
subject: Kråkeneset gabbro
subject: mafic crust
subject: transient porosity
subject: Western Gneiss Region
classificationCode: 550
subject: Geowissenschaften

description: Fluid–rock interactions play a key role in the formation, evolution and recycling of the Earth's crust. For fluids to infiltrate rocks and enable and sustain fluid-mediated mineral transformations, fluid pathways are required. In this study, we examined the potential mechanisms of formation of such pathways via detailed mineralogical, petrophysical and thermodynamic analysis of a dry, essentially ‘non-porous’ gabbro that was hydrated and transformed into an amphibolite under amphibolite-facies conditions. During a previous regional HP eclogite-facies metamorphism, the gabbro did not equilibrate and preserved almost entirely its igneous textures and magmatic minerals. Rock transformation during amphibolitization was triggered by fluid infiltration through a newly opened N–S striking fracture network. An equally spaced fracture network formed by mode I opening related to the formation of an E–W striking shear zone at the northern and southern borders of the gabbro body. The amphibolitization process allowed the fluid to pervasively infiltrate the rock from the fracture into the pristine gabbro. The essentially fully amphibolitized sample exhibits some unaffected gabbroic mineral relicts. Even though the amphibolitization process led to the formation of ~70 vol.% hydrous phases, it was accompanied by densification and related porosity formation. The modes and compositions of minerals within partly amphibolitized rocks indicate that besides the uptake of H2O, no significant mass exchanges were necessary for this transformation, at least on the thin section scale. Thermodynamic modelling and petrological data show that the transition from gabbro to amphibolite favours porosity formation. In the model, the reaction front proceeded as soon as the gabbro at the reactive interfaces of the affected minerals was sufficiently transformed. At this point, fluid was not consumed further but remained as a free fluid phase, which progressed through the newly formed pore space and advanced amphibolitization. Once the gabbro was almost entirely amphibolitized, its mineral content and mineral chemistry no longer changed, so the progress of amphibolitization progress was controlled by fluid availability. This case study shows that fluid–rock interaction leading to hydration of a rock can be efficiently maintained in almost non-permeable, dry and mafic crust and, therefore, strongly affects the petrophysical properties of the Earth's crust.
Real-time formalism for studying the nonlinear response of "smart" materials to an electric field
Creators: name: Freericks, J. K.
name: Turkowski, V.
name: Zlatic, and V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The nonlinear response of a material to a large electric field (steady or pulsed) often determines the ultimate performance of the material for electronics applications. The formalism for understanding nonlinear effects in conventional semiconductors is well understood. The formalism is less well developed for so-called ``smart'' materials that are tuned to lie close to the metal-insulator transition. Here we show that the nonlinear response of a strongly correlated electronic material can be calculated with a massively parallel algorithm by discretizing a continuous matrix operator on the Kadanoff-Baym contour in real time. We benchmark the technique by examining the solutions when the field vanishes and comparing the results to exact results from an equilibrium formalism. We briefly discuss the numerical issues associated with the case of a large electric field and present results that show how the Bloch oscillations become damped as the scattering due to electron correlations increases.
description: (8 pages, Proceedings of the 2005 DOD HPMC User's Group Conference)
Heavy quarkonia spectroscopy at zero and finite temperature in bottom-up AdS/QCD
Creators: name: Contreras, Miguel Angel Martin
name: Diles, Saulo
name: Vega, Alfredo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: S-wave states of charmonium and bottomonium are described using bottom-up AdS/QCD. We propose a holographic model that unifies the description of masses and decay constants, leading to a precise match with experimental data on heavy quarkonia. Finite temperature effects are considered by calculating the current-current spectral functions of heavy vector mesons. The identification of quasi-particle states as Breit-Wigner resonances in the holographic spectral function was made. We develop a prescription to subtract background contributions from the spectral function to isolate the Breit-Wigner peak. The quasi-particle holographic thermal evolution is described, allowing us to estimate the melting temperature for vector charmonia and bottomonia. Our holographic model predicts that $J/Ψ$ melts at $415$ MeV $(\sim 2.92 ~T_c)$ and $Υ$ melts at $465$ MeV $(\sim 3.27~ T_c)$)
description: 13 pages, 5 figures
Mona Lisa, the stochastic view and fractality in color space
Creators: name: Pedram, P.
name: Jafari, G. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A painting consists of objects which are arranged in specific ways. The art of painting is drawing the objects, which can be considered as known trends, in an expressive manner. Detrended methods are suitable for characterizing the artistic works of the painter by eliminating trends. It means that we study the paintings, regardless of its apparent purpose, as a stochastic process. We apply multifractal detrended fluctuation analysis to characterize the statistical properties of Mona Lisa, as an instance, to exhibit the fractality of the painting. Our results show that Mona Lisa is long range correlated and almost behaves similar in various scales.
description: 16 pages, 5 figures, to appear in Int. J. Mod. Phys. C
Il programma AirWatch ed il progetto EUSO
Creators: name: O. Catalano
name: G. D'Ali Staiti
name: S. Giarrusso
name: G. La Rosa
name: M.C. Maccarone
name: B. Sacco
name: L. Scarsi
name: F. Becattini
name: S. Bottai
name: A. Cartacci
name: D. Guetta
name: G. Landi
name: P. Mazzinghi
name: E. Pace
name: M. Romoli
name: M. Salvati
name: P. Sona
name: P. Spillantini
name: P.L. Tasselli
name: B. Tiribilli
name: G. Toci
name: S. Cuneo
name: D.De Marco
name: F. Fontanelli
name: F. Gatti
name: V. Gracco
name: P. Musico
name: M. Pallavicini
name: A. Petrolini
name: M. Sannino
name: G. Testera
name: M. Aglietta
name: G. Badino
name: P. Galeotti
name: P. Vallania
name: G. Giannini
name: A. Gregorio
name: R. Stalio
Publisher: name: INFN Open Access Repository
Year: 2001

description: Il programma AirWatch riguarda l'osservazione dallo spazio degli sciami estesi di particelle prodotti nell'atmosfera da particelle cosmiche di altissima energia. Nell'ambito di tale programma si colloca il progetto EUSO, recentemente sottoposto all'ESA da una collaborazione internazionale. In questa nota si descrivono la problematica scientifica connessa con i raggi cosmici di altissima energia, le problematiche tecniche legate all'osservazione dallo spazio degli sciami atmosferici estesi e si descrivono le linee di una possibile partecipazione dell'INFN al programma AirWatch ed al progetto EUSO in particolare.
Ahlers, Reinhild, Krämer, Peter: Das Bleibende im Wandel
Creators: name: Geldbach, Erich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 41 Nr. 3 (1992): Ökumenische Rundschau, Band 41, Heft 3
Character decomposition of Potts model partition functions. II. Toroidal geometry
Creators: name: Richard, Jean-Francois
name: Jacobsen, Jesper Lykke
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We extend our combinatorial approach of decomposing the partition function of the Potts model on finite two-dimensional lattices of size L x N to the case of toroidal boundary conditions. The elementary quantities in this decomposition are characters K\_{l,D} labelled by a number of bridges l=0,1,...,L and an irreducible representation D of the symmetric group S\_l. We develop an operational method of determining the amplitudes of the eigenvalues as well as some of their degeneracies.
description: 27 pages, 4 figures
Vector meson photoproduction studied in its radiative decay channel
Creators: name: Zhao, Qiang
name: Al-Khalili, J. S.
name: Cole, P. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We provide an analysis of vector meson photoproduction in the channel of the vector meson decaying into a pseudoscalar meson plus a photon, i.e. $V\to Pγ$. It is shown that non-trivial kinematic correlations arise from the measurement of the $Pγ$ angular distributions in the overall c.m. system in comparison with those in the vector-meson-rest frame. In terms of the vector meson density matrix elements, the implication of such kinematic correlations in the measurement of polarization observables is discussed. For the $ω$ meson production, due to its relatively large branching ratios for $ω\toπ^0γ$, additional events from this channel may enrich the information about the reaction mechanism and improve the statistics of the recent measurement of polarized beam asymmetries by the GRAAL Collaboration. For $ϕ\to ηγ$, $ρ\to πγ$, and $K^*\to Kγ$, we expect that additional information about the spin structure of the vector meson production vertex can be derived.
description: Revtex, 14 pages, 2 eps figures; Version accepted by PRC
Final state Sommerfeld effect on dark matter relic abundance
Creators: name: Cui, Xiaoyi
name: Luo, Feng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: If the annihilation products of dark matter (DM) are non-relativistic and if there is some long-range force between them, there can be Sommerfeld effect for the final state particles. We study this effect on DM relic abundance in the thermal freeze-out scenario. As a proof of concept, we consider the case of a DM pair annihilation into a final state pair, assuming that the mutual interactions between the two final state particles give rise to a Coulomb-like potential, and that the masses of the initial and final state particles are similar, so that both the initial and final state particles are non-relativistic. The size of the final state Sommerfeld (FSS) effect depends on the strength of the potential, as well as on the mass ratio of the final and initial state particles. We find that the impact of the FSS effect on DM relic abundance can be significant, and an electroweak sized long-range interaction is large enough to make a correction well beyond the observational accuracy. Another feature of the FSS effect is that it could be suppressed when its time scale is longer than the lifetime of the final state particles. As a corollary, we also study in the DM coannihilation scenario where the initial state Sommerfeld effect between two coannihilators could be reduced due to their instability, which may need to be taken into account for an accurate calculation of the DM relic abundance.
description: 14 pages, 4 figures
Una Struttura di Autenticazione Centralizzata per Diversi Gruppi di Sistemi LINUX, Realizzata con NIS e ISPEC
Creators: name: Macorini, Tullio
name: Strizzolo, Claudio
name: Strizzolo, Lucio
Publisher: name: INFN Open Access Repository
Year: 2004

description: Il presente documento descrive una struttura di autenticazione centralizzata per sistemi Linux, che consente di gestire l'accesso a diversi insiemi di macchine da parte di gruppi distinti di utenti. La struttura in oggetto é; in produzione per il riconoscimento degli utenti su vari sistemi di calcolo della Sezione di Trieste, dislocati in siti geografici differenti. L'architettura é; stata realizzata per mezzo di un unico dominio NIS, impiegando alcune funzionalità; particolari offerte dai moduli di autenticazione di Linux, e utilizzando il protocollo IPsec per garantire la sicurezza delle comunicazioni tra i server NIS. Il documento presenta le caratteristiche principali della struttura ed alcune modalità; operative per la sua realizzazione.
Lie Algebras and Suppression of Decoherence in Open Quantum Systems
Creators: name: Ritter, William Gordon
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Since there are many examples in which no decoherence-free subsystems exist (among them all cases where the error generators act irreducibly on the system Hilbert space), it is of interest to search for novel mechanisms which suppress decoherence in these more general cases. Drawing on recent work (quant-ph/0502153) we present three results which indicate decoherence suppression without the need for noiseless subsystems. There is a certain trade-off; our results do not necessarily apply to an arbitrary initial density matrix, or for completely generic noise parameters. On the other hand, our computational methods are novel and the result--suppression of decoherence in the error-algebra approach without noiseless subsystems--is an interesting new direction.
description: 7 pages
The Unstable Glasma
Creators: name: Romatschke, Paul
name: Venugopalan, Raju
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss results from 3+1-D numerical simulations of SU(2) Yang--Mills equations for an unstable Glasma expanding into the vacuum after a high energy heavy ion collision. We expand on our earlier work on a non-Abelian Weibel instability in such a system and study the behavior of the instability in greater detail on significantly larger lattices than previously. We establish the time scale for the onset of the instability and demonstrate that the growth rate is robust as one approaches the continuum limit. For large violations of boost invariance, non-Abelian effects cause the growth of soft modes to saturate. At late times, we observe significant creation of longitudinal pressure and a systematic trend towards isotropy. These time scales however are significantly larger than those required for early thermalization in heavy ion collisions. We discuss additional effects in the produced Glasma that may speed up thermalization.
description: 19 pages, 6 figures, uses REVTEX4; v2: added discussion, matches published version
Can one extract the pi-neutron scattering length from pi-deuteron scattering?
Creators: name: Nogga, A.
name: Hanhart, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We give a prove of evidence that the original power counting by Weinberg can be applied to estimate the contributions of the operators contributing to the pi-deuteron scattering length. As a consequence, pi-deuteron observables can be used to extract neutron amplitudes--in case of pi-deuteron scattering this means that the pi-neutron scattering length can be extracted with high accuracy. This result is at variance with recent claims. We discuss the origin of this difference.
description: 9 pages, 4 figures
Superconductor-Insulator Phase Separation Induced by Rapid Cooling in kappa-(ET)_2Cu[N(CN)_2]Br
Creators: name: Taylor, O. J.
name: Carrington, A.
name: Schlueter, J. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present measurements of the low temperature specific heat of single crystals of kappa-(ET)_2Cu[N(CN)_2]Br as a function of the cooling rate through the glasslike structure transition at $\sim$ 80K. We find that rapid cooling produces a small (< 4%) decrease in the superconducting transition temperature accompanied by a substantial (up to 50%) decrease in the normal-state electronic specific heat. A natural explanation of our data is that there is a macroscopic phase separation between superconducting and insulating regions in rapidly cooled samples.
description: 4 pages, to appear in Phys. Rev. B (Rapid Comm)
Cooling with a subsonic flow of quantum fluid
Creators: name: Diribarne, Pantxo
name: Rousset, Bernard
name: Sergeev, Yuri A.
name: Noûs, Camille
name: Valentin, Jérôme
name: Roche, Philippe-Emmanuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Miniature heaters are immersed in flows of quantum fluid and the efficiency of heat transfer is monitored versus velocity, superfluid fraction and time. The fluid is $^4$He helium with a superfluid fraction varied from 71% down to 0% and an imposed velocity up to 3 m/s, while the characteristic sizes of heaters range from 1.3 $μ$m up to few hundreds of microns. At low heat fluxes, no velocity dependence is observed. In contrast, some velocity dependence emerges at larger heat flux, as reported previously, and three non-trivial properties of heat transfer are identified. First, at the largest superfluid fraction (71%), a new heat transfer regime appears at non-null velocities and it is typically 10% less conductive than at zero velocity. Second, the velocity dependence of the mean heat transfer is compatible with the square-root dependence observed in classical fluids. Surprisingly, the prefactor to this dependence is maximum for an intermediate superfluid fraction or temperature (around 2 K). Third, the heat transfer time series exhibit highly conductive short-lived events. These \textit{cooling glitches} have a velocity-dependent characteristic time, which manifest itself as a broad and energetic peak in the spectrum of heat transfer time series, in the kHz range. After showing that the velocity dependence can be attributed to the breaking of superfluidity within a thin shell surrounding heaters, an analytical model of forced heat transfer in a quantum flow is developed to account for the properties reported above. We argue that large scale flow patterns must form around the heater, having a size proportional to the heat flux (here two decades larger than the heater diameter) and resulting in a turbulent wake. The observed spectral peaking of heat transfer is quantitatively consistent with the formation of a Von Kármán vortex street in the wake of a bluff body.
description: 23 pages, 16 figures
Deposing the Cool Corona of KPD 0005+5106
Creators: name: Drake, Jeremy J.
name: Werner, Klaus
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The ROSAT PSPC pulse height spectrum of the peculiar He-rich hot white dwarf KPD 0005+5106 provided a great surprise when first analysed by Fleming, Werner & Barstow (1993). It defied the best non-LTE modelling attempts in terms of photospheric emission from He-dominated atmospheres including C, N and O and was instead interpreted as the first evidence for a coronal plasma around a white dwarf. We show here that a recent high resolution Chandra LETGS spectrum has more structure than expected from a thermal bremsstrahlung continuum and lacks the narrow lines of H-like and He-like C expected from a coronal plasma. Moreover, a coronal model requires a total luminosity more than two orders of magnitude larger than that of the star itself. Instead, the observed 20-80 AA flux is consistent with photospheric models containing trace amounts of heavier elements such as Fe. The soft X-ray flux is highly sensitive to the adopted metal abundance and provides a metal abundance diagnostic. The weak X-ray emission at 1 keV announced by O'Dwyer et al (2003) instead cannot arise from the photosphere and requires alternative explanations. We echo earlier speculation that such emission arises in a shocked wind. Despite the presence of UV-optical O VIII lines from transitions between levels n=7-10, no X-ray O VIII Ly alpha flux is detected. We show that O VIII Lyman photons can be trapped by resonant scattering within the emitting plasma and destroyed by photoelectric absorption.
description: 15 Pages, 4 figures. Accepted for the Astrophysical Journal
D2.8 Project Plan; Quality Plan; Ethical Procedures- UPDATE 2
Creators: name: ARETE
Publisher: name: Zenodo
Year: 2021

description: The D2.8 “Project Plan; Quality Plan; Ethical procedures-UPDATE 2” is an update of the Deliverable D2.7, which was submitted in M14 (which in turn was the update of D2.2 at M3 and included updates for D1.1 and D1.2 in terms of Ethical Procedures). The following updates have been made by the ARETE consortium between M14- M26:
 ● The ARETE project successfully underwent a first project review in M14.
 ● The ARETE project has been transferred to the European Health and Digital Executive Agency (the ‘new granting authority’) from DG for Communications Networks, Content and Technology.
 ● The 1st Periodic Report including the M18 financial reports has been submitted, and the interim payment has been approved by EC.
 ● The 2nd amendment of the Grant Agreement has been introduced and submitted in M26.
 o Annex 1 (Description of Action - DoA) has been changed; o Annex 2 (estimated budget of action) has been changed; ● To date, 26 deliverables has been completed, 9 of them have been approved and one milestone has been achieved. ● To date, 5 General Assembly (GA) meetings, 8 Project Steering Committee (PSC) meetings including 1 extraordinary PSC which was called by Project Coordinator in M23 to migrate the risks of the ARETE project and 1 reviewing meeting have been completed. ● The WP7 leader changed from CLB to VIC from M15.
 ● Partner 4 University of Leicester (ULE) was terminated in M23, and the new partner Durham University (UDUR) joined the consortium in M24 (as the WP4 leader Prof. Effie Law accepted a new position at Durham University). The WP4 lead has changed from ULE to UDUR. ● A new Pilot 4: Teaching with eXtended Reality -Evaluating the MirageXR Authoring Tool (the teachers would utilise and evaluate the AR authoring toolkit, given the research gas identified with the literature review that took place within the second year of the project) added on the 2nd amendment. ● The WP3 and WP4 end dates have been extended to M42.
 ● A new General Assembly (GA) meeting (in M38) added on the 2nd amendment due the ARETE project extended to 42 months and moved the 6th GA meeting from M34 to M32.
 ● The board members Paul Sweeney and James Corbett stepped down from Industry Capacity Board as they moved to the new industry positions. This report is tended to be a live document and although no significate changes to this document are envisioned, some updates will be provided in M36
description: This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 856533.
Deep Hashing for Secure Multimodal Biometrics
Creators: name: Talreja, Veeru
name: Valenti, Matthew
name: Nasrabadi, Nasser
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: When compared to unimodal systems, multimodal biometric systems have several advantages, including lower error rate, higher accuracy, and larger population coverage. However, multimodal systems have an increased demand for integrity and privacy because they must store multiple biometric traits associated with each user. In this paper, we present a deep learning framework for feature-level fusion that generates a secure multimodal template from each user's face and iris biometrics. We integrate a deep hashing (binarization) technique into the fusion architecture to generate a robust binary multimodal shared latent representation. Further, we employ a hybrid secure architecture by combining cancelable biometrics with secure sketch techniques and integrate it with a deep hashing framework, which makes it computationally prohibitive to forge a combination of multiple biometrics that pass the authentication. The efficacy of the proposed approach is shown using a multimodal database of face and iris and it is observed that the matching performance is improved due to the fusion of multiple biometrics. Furthermore, the proposed approach also provides cancelability and unlinkability of the templates along with improved privacy of the biometric data. Additionally, we also test the proposed hashing function for an image retrieval application using a benchmark dataset. The main goal of this paper is to develop a method for integrating multimodal fusion, deep hashing, and biometric security, with an emphasis on structural data from modalities like face and iris. The proposed approach is in no way a general biometric security framework that can be applied to all biometric modalities, as further research is needed to extend the proposed framework to other unconstrained biometric modalities.
Black hole X-ray binaries LMC X-1 and X-3: observations confront spectral models
Creators: name: Yao, Yangsen
name: Wang, Q. Daniel
name: Zhang, Shuang Nan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a comprehensive spectral analysis of black hole X-ray binaries, LMC X-1 and LMC X-3, based on BeppoSAX observations. We test both the multi-color disk plus power law (MCD+PL) model and a newly-developed Monte-Carlo simulation- based model for a Comptonized MCD (CMCD) with either a spherical or a slab-like corona, by comparing the inferred parameters with independent direct measurements. While all models give an adequate description of the spectra, we find a significant discrepancy between the MCD+PL inferred X-ray-absorbing gas column density and the absorption-edge measurement based on dispersed X-ray spectra. The MCD+PL fits to the LMC X-1 spectra also require a change in the inner disk radius during the BeppoSAX observation, which may be due to the nonphysical effects inherited in the model. In contrast, the CMCD model with the spheric corona gives the predictions of both the disk inclination angle and the absorption that are consistent with the direct measurements, and only slightly under-predicts the black hole mass of LMC X-3. The model explains the spectral state evolution of LMC X-1 within the BeppoSAX observation as a change in the accretion rate, which leads to an increase in both the inner disk temperature and the Comptonization opacity. On the other hand, the CMCD model with the slab-like corona is more problematic in the test and is thus not recommended.
description: 7 pages including 3 tables and 4 figures, MNRAS in press
Additional file 1 of External phantom-based validation of a deep-learning network trained for upscaling of digital low count PET data
Creators: name: Braune, Anja
name: Hosch, René
name: Kersting, David
name: Müller, Juliane
name: Hofheinz, Frank
name: Herrmann, Ken
name: Nensa, Felix
name: Kotzerke, Jörg
name: Seifert, Robert
Publisher: name: figshare
Year: 2025
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Supplementary file 1.
Barth, Hans-Martin: Sehnsucht nach den Heiligen?
Creators: name: Koerrenz, Ralf
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 41 Nr. 3 (1992): Ökumenische Rundschau, Band 41, Heft 3
Testing of high heat flux 3D printed aluminium evaporators
Creators: name: Gerner, Henk Jan Van
name: Smit, Marc De
name: Helvoort, Deron Van
name: Es, Johannes Van
Publisher: name: Zenodo
Year: 2019

description: The amount of waste heat that is generated in electronic components in aerospace application is increasing because of higher electrical power demands. As a result, conventional cooling methods are not able to maintain the electronic component below its maximum temperature. For this reason, a two-phase Mechanically Pumped Fluid Loop is being developed for high-power electronic components in a commercial aerospace application. These electronic components generate a heat load of 722 W on a 3.8 cm x 3.8 cm surface, resulting in a heat flux of 50 W/cm2. Tests with 8 different evaporator samples were carried out to determine the heat transfer coefficients and pressure drop and to select the optimal evaporator sample that is further developed in the detail design phase of the project. The tests show that the 3D printed aluminium evaporators are able to keep the heat source well below its maximum temperature. 
An efficient monolithic solution scheme for FE$^2$ problems
Creators: name: Lange, Nils
name: Hütter, Geralf
name: Kiefer, Björn
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The FE$^2$ method is a very flexible but computationally expensive tool for multiscale simulations. In conventional implementations, the microscopic displacements are iteratively solved for within each macroscopic iteration loop, although the macroscopic strains imposed as boundary conditions at the micro-scale only represent estimates. In order to reduce the number of expensive micro-scale iterations, the present contribution presents a monolithic FE$^2$ scheme, for which the displacements at the micro-scale and at the macro-scale are solved for in a common Newton-Raphson loop. In this case, the linear system of equations within each iteration is solved by static condensation, so that only very limited modifications to the conventional, staggered scheme are necessary. The proposed monolithic FE$^2$ algorithm is implemented into the commercial FE code Abaqus. Benchmark examples demonstrate that the monolithic scheme saves up to ~60% of computational costs.
Functional and enzymatic characterization of the receptor protein tyrosine phosphatase, CD45
Creators: name: Ng, David H. W.
Publisher: name: University of British Columbia
Year: 2009

description: CD45 is expressed exclusively on hematopoietic cells and is a major component of the lymphocyte cell surface. CD45 is required both in the development and in the antigen induced activation of lymphoid cells. Despite the demonstration of several in vitro substrates, only the src family kinases, p56lck and p59fyn have been clearly identified as potential in vivo subtrates. How the substrate specificity of CD45 is achieved in vivo is not known. CD45 isolated directly from cells and recombinant cytoplasmic CD45 did not discriminate between a variety of src-family phosphopeptides - indicating no substrate specificity at the peptide level. However, a direct interaction between p56lck and cytoplasmic CD45 was demonstrated in vitro. Several regions of p56lck could mediate this interaction, which was further modulated by the tyrosine phosphorylation state of p56lck and by the protein tyrosine phosphatase (PTP) activity of CD45. Overall, results demonstrated a complex interaction that provides insight into the enzyme/substrate relationship. To evaluate the substrate specificity and function of CD45 under cellular conditions, another receptor PTP, RPTPα was expressed in a CD45⁻, T cell receptor (TCR)+, BW5147 T lymphoma cell for comparative studies. Unlike CD45, high levels of RPTPα did not fully restore either proximal or distal TCR mediated signaling events. Furthermore, immunoprecipitated RPTPα was approximately one-seventh to one-tenth as active as CD45 when tested against artificial substrates. This difference in activity was also observed using recombinant enzymes. Therefore, CD45 is intrinsically a more efficient phosphatase, providing one reason why RPTPα is not able to substitute for CD45. This work reveals possible mechanisms that may account for CD45 substrate specificity under cellular environments. Ultimately, this information should assist in both the understanding of lymphoid cell biology and in the assessment of experimental and clinical targets towards modulation of lymphoid cell function.
Il Progetto ScienzaPerTutti:la Fisica in Rete
Creators: name: L. Benussi
name: H. Bilokon
name: R. Baldini
name: P. De Simone
name: A. C. De Vitis
name: E. Durante
name: F.L. Fabbri
name: G. Isidori
name: G. Nicoletti
name: P. Modestino
name: P. Patteri
name: C. Petrascu
name: S. P. Ratti
name: F. R. Romano
name: D. Sirghi
name: P. Valente
Publisher: name: INFN Open Access Repository
Year: 2005

description: ScienzaPerTutti (http://scienzapertutti.lnf.infn.it) sviluppa un progetto di comunicazione/divulgazione sui temi della scienza, rivolto al pubblico generico con particolare attenzione al mondo della scuola. Realizzato da ricercatori dei Laboratori Nazionali di Frascati dell'NFN, in due anni ha totalizzato oltre 1500000 accessi. Caratteristiche qualificanti sono: comunicazione diretta tra chi produce e chi fruisce della scienza; dichiarata  contaminabilità; agli idiomi comunicativi del mondo giovanile; dinamicità; dei contenuti che  qualificano il sito, più che come opportunità; occasionale di visita, come periodico evento-appuntamento in rete. Lo sviluppo del progetto si basa su un comitato redazionale permanente, sulla collaborazione d'esperti, ma anche sui contributi dei web-nauti visitatori.
Tunable critical field in Rashba superconductor thin-films
Creators: name: Olthof, L. A. B. Olde
name: Weggemans, J. R.
name: Kimbell, G.
name: Robinson, J. W. A.
name: Montiel, X.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The upper critical field in type II superconductors is limited by the Pauli paramagnetic limit. In superconductors with strong Rashba spin-orbit coupling this limit can be overcome by forming a helical state. Here we quantitatively study the magnetic field-temperature phase diagram of finite-size superconductors with Rashba spin-orbit coupling. We discuss the effect of finite size and shape anisotropy. We demonstrate that the critical field is controllable by intrinsic parameters such as spin-orbit coupling strength and tunable parameters such as sample geometry and applied field direction. Our study opens new avenues for the design of superconducting spin-valves.
description: 5 pages, 4 figures, supplemental materials
Steady-state nonequilibrium dynamical mean-field theory and the quantum Boltzman
Creators: name: Freericks, J. K.
name: Turkowski, V. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive the formalism for steady state nonequilibrium dynamical mean-field theory in a real-time formalism along the Kadanoff-Baym contour. The resulting equations of motion are first transformed to Wigner coordinates (average and relative time), and then re-expressed in terms of differential operators. Finally, we perform a Fourier transform with respect to the relative time, and take the first-order limit in the electric field to produce the quantum Boltzmann equation for dynamical mean-field theory. We next discuss the structure of the equations and their solutions, describing how these equations reduce to the Drude result in the limit of a constant relaxation time. We also explicitly demonstrate the equivalence between the Kubo and nonequilibrium approaches to linear response. There are a number of interesting modifications of the conventional quantum Boltzmann equation that arise due to the underlying bandstructure of the lattice.
description: (14 pages, proceedings of the Workshop on Progress in Nonequilibrium Green's Functions III, Kiel Germany)
Sistema di Remotizzazione KVM Utilizzato al TIER1 CNAF
Creators: name: Ricci, Pier Paolo
Publisher: name: INFN Open Access Repository
Year: 2007

description: Lo studio e l'utilizzo di un sistema avanzato di remotizzazione di Keyboard Video e Mouse (KVM) all'interno della sala macchine del Tier1 si é; reso necessario nel corso degli anni per garantire l'accesso all'alto numero di macchine presenti nella sala. Il motivo principale che ci ha indotti a valutare l'utilizzazione di un tale sistema é; il fatto che la sala macchine non é; presidiata e si trova ad una certa distanza dagli uffici dove il personale del centro ha sede abituale di lavoro. Il presente articolo intende riportare le varie fasi di studio e realizzazione che si sono susseguite negli scorsi anni al fine di identificare e rendere utilizzabile in produzione un sistema di remotizzazione KVM il più possibile efficiente. A tale proposito vengono riportati inoltre i costi e i fornitori dei vari sistemi utilizzati e i vantaggi e svantaggi che essi hanno evidenziato al fine di voler costituire un breve riferimento per altri centri che intendano usufruire di tali apparati.
Ecosystem services contingent on farming practices and landscape heterogeneity
Creators: name: Stiles, Shane
Publisher: name: F1000 Research Limited
Year: 2019

description: Prairies, once spanning the Upper Midwest, have now largely been replaced by agriculture. The lack of resources available in agricultural fields and the practices employed by farmers to maximize yield has led to a decline in insect and pollinator diversity. It is prudent to weigh the ecosystem services provided by a diverse insect community against current farming practices as they relate to crop yield. We sought to explain how landscape heterogeneity relates to insect diversity, as well as how insect diversity relates to crop yield across common farming practices. To evaluate how farming practices relate to yield and insect diversity we planted 35 single acre sites of Brassica carinata within 30 miles of Brookings, SD between 2017 and 2018. We randomly assigned each site with a combination of three treatments: tilling (yes/no), added honeybee hives (yes/no), and treatment with systemic neonicotinoids (yes/no). Using a sweep net we periodically collected insects from each site. To evaluate landscape heterogeneity we obtained landscape data surrounding each site and overlaid that data with buffers of 500m, 1000m, and 3000m from site center. Shannon Diversity of the landscape and insects were calculated for each site.

There is a significant positive relationship between insect (and pollinator) diversity with yield in the absence of any farming practice (p=0.002 and p<0.0001, respectively). All farming practices will increase yield. However, farming practices alter the relationship between yield and diversity. The addition of seed treatment or tillage negates the relationship between insect (and pollinator) diversity with yield. Seed treatment alone results in a flat relationship between diversity and yield for all insects and a negative relationship for pollinators. Two or more farming practices coupled together will generally diminish any contribution of diversity.
Increased landscape heterogeneity results in a positive relationship between insect diversity at the 1000m scale (p=0.019) and pollinator diversity at the 3000m scale (p<0.001), suggesting large-scale heterogeneity contributes to overall insect diversity. Lastly, there is a positive relationship between carinata yield and landscape diversity at the 3000m scale (p<0.0001). Our results show that increasing large-scale landscape heterogeneity is a good way to increase diversity and that diversity can serve as a substitute for other farming practices. Increased heterogeneity could save farmers from the input cost of treatment or tillage, by way of increased insect diversity, while still providing similar yields.
title: PASTORALISM IN SHIMSHAL: ADAPTING OLD PRACTICES TO MEET NEW CHALLENGES
Creators: name: Kreutzmann, Hermann Josef
Publisher: name: Freie Universität Berlin
Year: 2025
Subjects: subject: gendered division of labour
subject: Hunza
subject: Karakoram
subject: pasture disputes
subject: shrinking pastoralism
classificationCode: 301
subject: Soziologie, Anthropologie

description: Shimshal is one of the valleys in Karakoram most favourably endowed with pasture resources. The pastures are a major asset of the community and a stable feature of agricultural practice. However, in recent years pastures have become increasingly difficult to access and the pastoral workforce has been declining, threatening the sustainability of combined mountain agriculture and the livelihood of local farmers/herders. There are many factors behind this change. Due to increased outmigration and the lack of interest in pastoralism among the youth, it is hard to find skilled persons who can endure the harsh conditions of life in the pastures, and pasture management responsibilities have shifted from male to female household members. At the same time, however, farmers/herders of Shimshal are trying hard to resist encroachment on their ancestral lands and fend off territorial claims from neighbouring communities and external interference that could lead to their dispossession. This article examines the role of pastoralism in ensuring the social and economic well-being of the Shimshal community. It also looks at how community members have adapted their pastoral practices in the face of rapid social, economic and environmental changes.
Caratterizzazione di un Fotoconduttore Basato su Singolo Cristallo di Diamante 1b Mediante Luce di Sincrotrone
Creators: name: E. Burattini
name: A. De Sio
name: F. Malvezzi
name: A. Marcelli
name: F. Monti
name: E. Pace
Publisher: name: INFN Open Access Repository
Year: 2004

description: Questo rapporto mostra i risultati di alcune misure di calibrazione di rivelatori UV basati su film di diamante sintetico, utilizzando il setup esistente sul canale di luce di sincrotrone DXR-2 disponibile presso il Laboratorio DAFNE-L dei Laboratori Nazionali di Frascati. Lo scopo di queste misure è effettuare una valutazione del funzionamento e delle caratteristiche della beamline, in relazione alla possibilità di trasformare la strumentazione della linea stessa e adattarla alle necessità sperimentali per fare misure di test e caratterizzazione di rivelatori e sistemi ottici nelle bande spettrali che vanno dall'UV da vuoto al vicino IR. I risultati mostrano i limiti attuali della beamline per l'uso sull'intervallo desiderato, ma al contempo evidenziano le potenzialità della luce di sincrotrone per la caratterizzazione di rivelatori, potenzialità del resto già note.
LINMGR - Uno Strumento per la Gestione Centralizzata del Software su Sistemi Linux ReDHat
Creators: name: Gomezel, Roberto
name: Macorini, Tullio
name: Strizzolo, Claudio
name: Strizzolo, Lucio
name: Tirel, Alessandro
Publisher: name: INFN Open Access Repository
Year: 2002

description: In questo documento viene presentata una soluzione, realizzata presso la Sezione di Trieste dell'INFN, per la gestione centralizzata dei calcolatori con sistema operativo Linux RedHat, con l'obiettivo di semplificare l'installazione e l'aggiornamento dei pacchetti software, e la gestione dei sistemi.