cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inference and dynamic decision-making for deteriorating systems with probabilistic dependencies through Bayesian networks and deep reinforcement learning
Creators: name: Morato, Pablo G.
name: Andriotis, Charalampos P.
name: Papakonstantinou, Konstantinos G.
name: Rigo, Philippe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In the context of modern environmental and societal concerns, there is an increasing demand for methods able to identify management strategies for civil engineering systems, minimizing structural failure risks while optimally planning inspection and maintenance (I&M) processes. Most available methods simplify the I&M decision problem to the component level due to the computational complexity associated with global optimization methodologies under joint system-level state descriptions. In this paper, we propose an efficient algorithmic framework for inference and decision-making under uncertainty for engineering systems exposed to deteriorating environments, providing optimal management strategies directly at the system level. In our approach, the decision problem is formulated as a factored partially observable Markov decision process, whose dynamics are encoded in Bayesian network conditional structures. The methodology can handle environments under equal or general, unequal deterioration correlations among components, through Gaussian hierarchical structures and dynamic Bayesian networks. In terms of policy optimization, we adopt a deep decentralized multi-agent actor-critic (DDMAC) reinforcement learning approach, in which the policies are approximated by actor neural networks guided by a critic network. By including deterioration dependence in the simulated environment, and by formulating the cost model at the system level, DDMAC policies intrinsically consider the underlying system-effects. This is demonstrated through numerical experiments conducted for both a 9-out-of-10 system and a steel frame under fatigue deterioration. Results demonstrate that DDMAC policies offer substantial benefits when compared to state-of-the-art heuristic approaches. The inherent consideration of system-effects by DDMAC strategies is also interpreted based on the learned policies.
Heisenberg parabolically induced representations of Hermitian Lie groups, Part I: Unitarity and subrepresentations
Creators: name: Frahm, Jan
name: Weiske, Clemens
name: Zhang, Genkai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B15, 17B60, 22D30, 43A80, 43A85

description: For a Hermitian Lie group $G$, we study the family of representations induced from a character of the maximal parabolic subgroup $P=MAN$ whose unipotent radical $N$ is a Heisenberg group. Realizing these representations in the non-compact picture on a space $I(ν)$ of functions on the opposite unipotent radical $\bar{N}$, we apply the Heisenberg group Fourier transform mapping functions on $\bar N$ to operators on Fock spaces. The main result is an explicit expression for the Knapp-Stein intertwining operators $I(ν)\to I(-ν)$ on the Fourier transformed side. This gives a new construction of the complementary series and of certain unitarizable subrepresentations at points of reducibility. Further auxiliary results are a Bernstein-Sato identity for the Knapp-Stein kernel on $\bar{N}$ and the decomposition of the metaplectic representation under the non-compact group $M$.
description: 44 pages, v2: final published version
Exact out-of-equilibrium central spin dynamics from integrability
Creators: name: Fioretto, Davide
name: Caux, Jean-Sébastien
name: Gritsev, Vladimir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a Gaudin magnet (central spin model) with a time-dependent exchange couplings. We explicitly show that the Schrödinger equation is analytically solvable in terms of generalized hypergeometric functions for particular choices of the time dependence of the coupling constants. Our method establishes a new link between this system and the SU(2) Wess-Zumino-Witten model, and sheds new light on the implications of integrability in out-of-equilibrium quantum physics. As an application, a driven four-spin system is studied in detail.
Quasi-Rip: A New Type of Rip Model without Cosmic Doomsday
Creators: name: Wei, Hao
name: Wang, Long-Fei
name: Guo, Xiao-Jiao
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The fate of our universe is an unceasing topic of cosmology and the human being. The discovery of the current accelerated expansion of the universe significantly changed our view of the fate of the universe. Recently, some interesting scenarios concerning the fate of the universe attracted much attention in the community, namely the so-called "Little Rip" and "Pseudo-Rip". It is worth noting that all the Big Rip, Little Rip and Pseudo-Rip arise from the assumption that the dark energy density $ρ(a)$ is monotonically increasing. In the present work, we are interested to investigate what will happen if this assumption is broken, and then propose a so-called "Quasi-Rip" scenario, which is driven by a type of quintom dark energy. In this work, we consider an explicit model of Quasi-Rip in detail. We show that Quasi-Rip has an unique feature different from Big Rip, Little Rip and Pseudo-Rip. Our universe has a chance to be rebuilt from the ashes after the terrible rip. This might be the last hope in the "hopeless" rip.
description: 9 pages, 2 figures, 1 table, revtex4; v2: discussions added, Phys. Rev. D in press; v3: published version
Search for pair-produced massive coloured scalars in four-jet final states with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for pair-produced massive coloured scalar particles decaying to a four-jet final state is performed by the ATLAS experiment at the LHC in proton-proton collisions at sqrt(s) = 7 TeV. The analysed data sample corresponds to an integrated luminosity of 4.6 /fb. No deviation from the Standard Model is observed in the invariant mass spectrum of the two-jet pairs. A limit on the scalar gluon pair production cross-section of 70 pb (10 pb) is obtained at the 95% confidence level for a scalar gluon mass of 150 GeV (350 GeV). Interpreting these results as mass limits on scalar gluons, masses ranging from 150 GeV to 287 GeV are excluded at the 95% confidence level.
description: 7 pages plus author list (19 pages total), 4 figures, 11 tables, submitted to EPJC-Letters. Revision matches published version. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2012-18/
Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at sqrt(s)=7 TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. In this Letter, results are presented of a search for such particles, which decay at a significant distance from their production point, using a final state containing charged hadrons and an associated muon. This analysis uses a data sample of proton-proton collisions at sqrt(s)= 7 TeV corresponding to an integrated luminosity of 4.4 fb-1 collected in 2011 by the ATLAS detector operating at the Large Hadron Collider. Results are interpreted in the context of R-parity violating supersymmetric scenarios. No events in the signal region are observed and limits are set on the production cross section for supersymmetric particles, multiplied by the square of the branching ratio for a neutralino to decay to charged hadrons and a muon, as a function of the neutralino lifetime. To allow these limits to be used in a variety of models, they are presented for a range of squark and neutralino masses.
description: 9 pages plus author list (21 pages total), 6 figures, 1 tables, submitted to Phys. Lett. B All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2012-14/ Revision corresponds to published version
CLIO: a Novel Robotic Solution for Exploration and Rescue Missions in Hostile Mountain Environments
Creators: name: Focchi, Michele
name: Bensaadallah, Mohamed
name: Frego, Marco
name: Peer, Angelika
name: Fontanelli, Daniele
name: Del Prete, Andrea
name: Palopoli, Luigi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Rescue missions in mountain environments are hardly achievable by standard legged robots-because of the high slopes-or by flying robots-because of limited payload capacity. We present a concept for a rope-aided climbing robot which can negotiate up-to-vertical slopes and carry heavy payloads. The robot is attached to the mountain through a rope, and it is equipped with a leg to push against the mountain and initiate jumping maneuvers. Between jumps, a hoist is used to wind/unwind the rope to move vertically and affect the lateral motion. This simple (yet effective) two-fold actuation allows the system to achieve high safety and energy efficiency. Indeed, the rope prevents the robot from falling while compensating for most of its weight, drastically reducing the effort required by the leg actuator. We also present an optimal control strategy to generate point-to-point trajectories overcoming an obstacle. We achieve fast computation time (<1 s) thanks to the use of a custom simplified robot model. We validated the generated optimal movements in Gazebo simulations with a complete robot model with a < 5% error on a 16 m long jump, showing the effectiveness of the proposed approach, and confirming the interest of our concept. Finally, we performed a reachability analysis showing that the region of achievable targets is strongly affected by the friction properties of the foot-wall contact.
description: 7 pages
Thermodynamic performance of hot-carrier solar cells: A quantum transport model
Creators: name: Tesser, Ludovico
name: Whitney, Robert S.
name: Splettstoesser, Janine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In conventional solar cells, photogenerated carriers lose part of their energy before they can be extracted to make electricity. The aim of hot-carrier solar cells is to extract the carriers before this energy loss, thereby turning more energy into electrical power. This requires extracting the carriers in a nonequilibrium (nonthermal) energy distribution. Here, we investigate the performance of hot-carrier solar cells for such nonequilibrium distributions. We propose a quantum transport model in which each energy-loss process (carrier thermalization, relaxation, and recombination) is simulated by a Büttiker probe. We study charge and heat transport to analyze the hot-carrier solar cell's power output and efficiency, introducing partial efficiencies for different loss processes and the carrier extraction. We show that producing electrical power from a nonequilibrium distribution has the potential to improve the output power and efficiency. Furthermore, in the limit where the distribution is thermal, we prove that a boxcar-shaped transmission for the carrier extraction maximizes the efficiency at any given output power.
description: 16 pages, 9 figures
Vortex-density fluctuations, energy spectra and vortical regions in superfluid turbulence
Creators: name: Baggaley, Andrew W.
name: Laurie, Jason
name: Barenghi, Carlo F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Measurements of the energy spectrum and of the vortex-density fluctuation spectrum in superfluid turbulence seem to contradict each other. Using a numerical model, we show that at each instance of time the total vortex line density can be decomposed into two parts: one formed by metastable bundles of coherent vortices, and one in which the vortices are randomly oriented. We show that the former is responsible for the observed Kolmogorov energy spectrum, and the latter for the spectrum of the vortex line density fluctuations.
description: 5 pages, 5 figures
Identification of Adaptive Driving Style Preference through Implicit Inputs in SAE L2 Vehicles
Creators: name: Zheng, Zhaobo K.
name: Akash, Kumar
name: Misu, Teruhisa
name: Krishmoorthy, Vidya
name: Dong, Miaomiao
name: Lee, Yuni
name: Huang, Gaojian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: A key factor to optimal acceptance and comfort of automated vehicle features is the driving style. Mismatches between the automated and the driver preferred driving styles can make users take over more frequently or even disable the automation features. This work proposes identification of user driving style preference with multimodal signals, so the vehicle could match user preference in a continuous and automatic way. We conducted a driving simulator study with 36 participants and collected extensive multimodal data including behavioral, physiological, and situational data. This includes eye gaze, steering grip force, driving maneuvers, brake and throttle pedal inputs as well as foot distance from pedals, pupil diameter, galvanic skin response, heart rate, and situational drive context. Then, we built machine learning models to identify preferred driving styles, and confirmed that all modalities are important for the identification of user preference. This work paves the road for implicit adaptive driving styles on automated vehicles.
The "amplitude" parameter of Gamma-Ray Bursts and its implications for GRB classification
Creators: name: Lü, Hou-Jun
name: Zhang, Bing
name: Liang, En-Wei
name: Zhang, Bin-Bin
name: Sakamoto, Takanori
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Traditionally gamma-ray bursts (GRBs) are classified in the $T_{90}$-hardness ratio two-dimensional plane into long/soft and short/hard GRBs. In this paper, we suggest to add the "amplitude" of GRB prompt emission as the third dimension as a complementary criterion to classify GRBs, especially those of short durations. We define three new parameters $f$, $f_{\rm eff}$ and $f_{\rm eff,z}$ as ratios between the measured/simulated peak flux of a GRB/pseudo-GRB and the flux background, and discuss the applications of these parameters to GRB classification. We systematically derive these parameters to find that most short GRBs are likely not "tip-of-iceberg" of long GRBs. However, one needs to be cautious if a short GRB has a relatively small $f$ (e.g. $f<1.5$), since the chance for an intrinsically long GRB to appear as a "disguised" short GRB is higher. Based on avaialble data, we quantify the probability of a disguised short GRB below a certain $f$ value is as $P (
description: 11 pages, 14 figures. Accepted by MNRAS
Community Structure Detection in Complex Networks with Partial Background Information
Creators: name: Zhang, Zhong-Yuan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Constrained clustering has been well-studied in the unsupervised learning society. However, how to encode constraints into community structure detection, within complex networks, remains a challenging problem. In this paper, we propose a semi-supervised learning framework for community structure detection. This framework implicitly encodes the must-link and cannot-link constraints by modifying the adjacency matrix of network, which can also be regarded as de-noising the consensus matrix of community structures. Our proposed method gives consideration to both the topology and the functions (background information) of complex network, which enhances the interpretability of the results. The comparisons performed on both the synthetic benchmarks and the real-world networks show that the proposed framework can significantly improve the community detection performance with few constraints, which makes it an attractive methodology in the analysis of complex networks.
Depth statistics
Creators: name: Mosler, Karl
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In 1975 John Tukey proposed a multivariate median which is the 'deepest' point in a given data cloud in R^d. Later, in measuring the depth of an arbitrary point z with respect to the data, David Donoho and Miriam Gasko considered hyperplanes through z and determined its 'depth' by the smallest portion of data that are separated by such a hyperplane. Since then, these ideas has proved extremely fruitful. A rich statistical methodology has developed that is based on data depth and, more general, nonparametric depth statistics. General notions of data depth have been introduced as well as many special ones. These notions vary regarding their computability and robustness and their sensitivity to reflect asymmetric shapes of the data. According to their different properties they fit to particular applications. The upper level sets of a depth statistic provide a family of set-valued statistics, named depth-trimmed or central regions. They describe the distribution regarding its location, scale and shape. The most central region serves as a median. The notion of depth has been extended from data clouds, that is empirical distributions, to general probability distributions on R^d, thus allowing for laws of large numbers and consistency results. It has also been extended from d-variate data to data in functional spaces.
The Interaction Gap: A Step Toward Understanding Trust in Autonomous Vehicles Between Encounters
Creators: name: Hunter, Jacob G.
name: Konishi, Matthew
name: Jain, Neera
name: Akash, Kumar
name: Wu, Xingwei
name: Misu, Teruhisa
name: Reid, Tahira
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Shared autonomous vehicles (SAVs) will be introduced in greater numbers over the coming decade. Due to rapid advances in shared mobility and the slower development of fully autonomous vehicles (AVs), SAVs will likely be deployed before privately-owned AVs. Moreover, existing shared mobility services are transitioning their vehicle fleets toward those with increasingly higher levels of driving automation. Consequently, people who use shared vehicles on an "as needed" basis will have infrequent interactions with automated driving, thereby experiencing interaction gaps. Using human trust data of 25 participants, we show that interaction gaps can affect human trust in automated driving. Participants engaged in a simulator study consisting of two interactions separated by a one-week interaction gap. A moderate, inverse correlation was found between the change in trust during the initial interaction and the interaction gap, suggesting people "forget" some of their gained trust or distrust in automation during an interaction gap.
description: 5 pages, 3 figures
Search for direct chargino production in anomaly-mediated supersymmetry breaking models based on a disappearing-track signature in pp collisions at sqrt(s)=7 TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for direct chargino production in anomaly-mediated supersymmetry breaking scenarios is performed in pp collisions at sqrt(s) = 7 TeV using 4.7 fb^-1 of data collected with the ATLAS experiment at the LHC. In these models, the lightest chargino is predicted to have a lifetime long enough to be detected in the tracking detectors of collider experiments. This analysis explores such models by searching for chargino decays that result in tracks with few associated hits in the outer region of the tracking system. The transverse-momentum spectrum of candidate tracks is found to be consistent with the expectation from the Standard Model background processes and constraints on chargino properties are obtained.
description: 18 pages plus author list (39 pages total), 7 figures, 2 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2012-19/ Revision corresponds to published version
Result of the MICROSCOPE Weak Equivalence Principle test
Creators: name: Touboul, Pierre
name: Métris, Gilles
name: Rodrigues, Manuel
name: Bergé, Joel
name: Robert, Alain
name: Baghi, Quentin
name: André, Yves
name: Bedouet, Judicaël
name: Boulanger, Damien
name: Bremer, Stefanie
name: Carle, Patrice
name: Chhun, Ratana
name: Christophe, Bruno
name: Cipolla, Valerio
name: Damour, Thibault
name: Danto, Pascale
name: Demange, Louis
name: Dittus, Hansjoerg
name: Dhuicque, Océane
name: Fayet, Pierre
name: Foulon, Bernard
name: Guidotti, Pierre-Yves
name: Hagedorn, Daniel
name: Hardy, Emilie
name: Huynh, Phuong-Anh
name: Kayser, Patrick
name: Lala, Stéphanie
name: Lämmerzahl, Claus
name: Lebat, Vincent
name: Liorzou, Françoise
name: List, Meike
name: Löffler, Frank
name: Panet, Isabelle
name: Pernot-Borràs, Martin
name: Perraud, Laurent
name: Pires, Sandrine
name: Pouilloux, Benjamin
name: Prieur, Pascal
name: Rebray, Alexandre
name: Reynaud, Serge
name: Rievers, Benny
name: Selig, Hanns
name: Serron, Laura
name: Sumner, Timothy
name: Tanguy, Nicolas
name: Torresi, Patrizia
name: Visser, Pieter
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The space mission MICROSCOPE dedicated to the test of the Equivalence Principle (EP) operated from April 25, 2016 until the deactivation of the satellite on October 16, 2018. In this analysis we compare the free-fall accelerations ($a_{\rm A}$ and $a_{\rm B}$) of two test masses in terms of the Eötvös parameter $η({\rm{A, B}}) = 2 \frac{a_{\rm A}- a_{\rm B}}{a_{\rm A}+ a_{\rm B}}$. No EP violation has been detected for two test masses, made from platinum and titanium alloys, in a sequence of 19 segments lasting from 13 to 198 hours down to the limit of the statistical error which is smaller than $10^{-14}$ for $ η({\rm{Ti, Pt}})$. Accumulating data from all segments leads to $η({\rm{Ti, Pt}}) =[-1.5\pm{}2.3{\rm (stat)}\pm{}1.5{\rm (syst)}] \times{}10^{-15}$ showing no EP violation at the level of $2.7\times{}10^{-15}$ if we combine stochastic and systematic errors quadratically. This represents an improvement of almost two orders of magnitude with respect to the previous best such test performed by the Eöt-Wash group. The reliability of this limit has been verified by comparing the free falls of two test masses of the same composition (platinum) leading to a null Eötvös parameter with a statistical uncertainty of $1.1\times{}10^{-15}$.
description: Class. Quantum Grav. 39 204009
Inflation and fractional quantum cosmology
Creators: name: Rasouli, S. M. M.
name: Costa, E. W. Oliveira
name: Moniz, P. V.
name: Jalalzadeh, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Wheeler--DeWitt equation for a flat and compact Friedmann--Lemaître--Robertson--Walker cosmology at the pre-inflation epoch is studied in the contexts of the standard and fractional quantum cosmology. Working within the semiclassical regime and applying the WKB approximation, we show that some fascinating consequences are obtained for our simple fractional scenario that are completely different from their corresponding standard counterparts: (i) The conventional de Sitter behavior of the inflationary universe for constant potential is replaced by a power-law inflation. (ii) The non-locality of the Riesz's fractional derivative produces a power-law inflation that depends on the fractal dimension of the compact spatial section of space-time, independent of the energy scale of the inflaton.
description: 13 pages
Living Under Cover: Homophobia in Chinelo Okparanta's Under the Udala Trees
Creators: name: Thomas-Michael Emeka Chukwumezie
name: Elizabeth Onogwu
Publisher: name: Zenodo
Year: 2023
Subjects: Homosexuality, Homophobia, Discrimination, Persecution, Society, Nigeria.

description: Abstract
Homosexuality in Nigeria today has taken on many negative assumptions; viewed as an anomaly and has become synonymous to a western aberration that represents one of the vestiges of colonization. However, a critical historiography of homosexuality in Africa proves quite the contrary. This paper strives to explore the dilemma, discrimination, physical and psychological persecution and torment faced by homosexuals in Nigeria, comprehend the challenges they encounter in a society that polices and punishes their sexual orientations thus forcing them to live "under cover;"1 or be killed. It also seeks to evaluate the future of gay men and women in Nigeria. It organizes its fundamental argument around Bernard Matolino's logic of "harm" (2017) while relying on queer theory as a scaffold. The study further investigates how gay men and women create and sustain homoerotic relationships, form homosocial alliances to deliberate the general problem surrounding their sexualities, the punishments they face when caught. This is because as Appiah Kwame and Mutua Makau state in their separate studies, sexual orientation is immutable since people are not blamable for their tendency to be attracted to people of the same sex. Thus, the study invokes Bernard Matolino's logic of "harm" by observing that severe harm is not done to the soul of the society by tolerating the presence of its gay populace thus the urgent need to stop the persecution of homosexuals which seems to be the missive of Okparanta's Under the Udala Trees.
Superconductivity from electronic interactions and spin-orbit enhancement in bilayer and trilayer graphene
Creators: name: Jimeno-Pozo, Alejandro
name: Sainz-Cruz, Héctor
name: Cea, Tommaso
name: Pantaleón, Pierre A.
name: Guinea, Francisco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss a Kohn-Luttinger-like mechanism for superconductivity in Bernal bilayer graphene and rhombohedral trilayer graphene. Working within the continuum model description, we find that the screened long-range Coulomb interaction alone gives rise to superconductivity with critical temperatures that agree with experiments. We observe that the order parameter changes sign between valleys, which implies that both materials are valley-singlet, spin-triplet superconductors. Adding Ising spin-orbit coupling leads to a significant enhancement in the critical temperature, also in line with experiment, and the superconducting order parameter shows locking between the spin and valley degrees of freedom.
description: 5 pages, 4 figures and supplementary material. Reviewed results and extended discussion
DABERT: Dual Attention Enhanced BERT for Semantic Matching
Creators: name: Wang, Sirui
name: Liang, Di
name: Song, Jian
name: Li, Yuntao
name: Wu, Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Transformer-based pre-trained language models such as BERT have achieved remarkable results in Semantic Sentence Matching. However, existing models still suffer from insufficient ability to capture subtle differences. Minor noise like word addition, deletion, and modification of sentences may cause flipped predictions. To alleviate this problem, we propose a novel Dual Attention Enhanced BERT (DABERT) to enhance the ability of BERT to capture fine-grained differences in sentence pairs. DABERT comprises (1) Dual Attention module, which measures soft word matches by introducing a new dual channel alignment mechanism to model affinity and difference attention. (2) Adaptive Fusion module, this module uses attention to learn the aggregation of difference and affinity features, and generates a vector describing the matching details of sentence pairs. We conduct extensive experiments on well-studied semantic matching and robustness test datasets, and the experimental results show the effectiveness of our proposed method.
description: Accepted by COLING 2022
Super-Cooled Liquids: Equivalence between Mode-Coupling Theory and Replica Approach
Creators: name: Rizzo, Tommaso
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We show that the replica approach to glassy dynamics provides, in spite of its static nature, a characterization of critical dynamics in the $β$-regime of super-cooled liquids that is equivalent to the one of Mode-Coupling-Theory, both qualitatively and quantitatively. The nature and extent of this equivalence is discussed in connection to the main open problems of the current theory.
description: extended version, accepted for publication on PRE
Long time behaviour of Ricci flow on open 3-manifolds
Creators: name: Bessières, Laurent
name: Besson, Gérard
name: Maillot, Sylvain
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the long time behaviour of Ricci flow with bubbling-off on a possibly noncompact $3$-manifold of finite volume whose universal cover has bounded geometry. As an application, we give a Ricci flow proof of Thurston's hyperbolisation theorem for $3$-manifolds with toral boundary that generalizes Perelman's proof of the hyperbolisation conjecture in the closed case.
description: 33 pages, 1 figure. Revised version accepted for publication in Commentarii Mathematici Helvetici
Nonequilibrium propagation and decay of a bound pair in driven t-J models
Creators: name: Bonca, J.
name: Mierzejewski, M.
name: Vidmar, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We perform an accurate time-dependent numerical study of out-of-equilibrium response of a bound state within t-J systems on a two-leg ladder and a square lattice. We show that the bound hole pair decays with the onset of finite steady current if both mechanisms for binding and the dissipation share matching degrees of freedom. Moreover, by investigating the mechanism of decay on the square lattice we find that the dynamics is governed by the decay in the direction perpendicular to the electric field, leading to much shorter decay times in comparison to the ladder where such dynamics is topologically restricted.
Non-homogeneous random walks, subdiffusive migration of cells and anomalous chemotaxis
Creators: name: Fedotov, S.
name: Ivanov, A. O.
name: Zubarev, A. Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: This paper is concerned with a non-homogeneous in space and non-local in time random walk model for anomalous subdiffusive transport of cells. Starting with a Markov model involving a structured probability density function, we derive the non-local in time master equation and fractional equation for the probability of cell position. We show the structural instability of fractional subdiffusive equation with respect to the partial variations of anomalous exponent. We find the criteria under which the anomalous aggregation of cells takes place in the semi-infinite domain.
description: 18 pages, accepted for publication
Explanations for Trustworthy AI in Critical Infrastructure: A Case from Wastewater Treatment in Norway
Creators: name: Følstad, Asbjørn
name: Eidnes, Sølve
Publisher: name: Zenodo
Year: 2025
Subjects: Human-centered explainable AI
Trustworthy AI
critical infrastructure

description: Artificial intelligence applications in critical infrastructure poses requirements for explainability and interpretability, something that is also accentuated in recent European legislation on AI. In this position paper, we provide a glimpse into an ongoing project on AI development and implementation to improve highly instrumented wastewater treatment processes, with demands for explainability and interpretability to satisfy quality demands and requirements for trustworthy AI. Taking a starting point in previous HCXAI and XAI contributions, we discuss three takeaways from the case concerning (a) the benefit of targeted explanations, (b) the need for explanations to drive user action, and the implications of inaccurate explanations. In conclusion, we reflect on the role of explanations in assessments and audits of AI-applications critical infrastructure.
Stable algorithm for event detection in event-driven particle dynamics
Creators: name: Bannerman, Marcus N.
name: Strobl, Severin
name: Formella, Arno
name: Poeschel, Thorsten
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Event-Driven Particle Dynamics is a fast and precise method to simulate particulate systems of all scales. In this work it is demonstrated that, despite the high accuracy of the method, the finite machine precision leads to simulations entering invalid states where the dynamics are undefined. A general event-detection algorithm is proposed which handles these situations in a stable and efficient manner. This requires a definition of the dynamics of invalid states and leads to improved algorithms for event-detection in hard-sphere systems.
MILLIY VA XORIJIY TAJRIBALAR ASOSIDA TALABALARNING ETNOEKOLOGIK MADANIYATINI SHAKLLANTIRISH
Creators: name: Utebaeva, Aziza
Publisher: name: Zenodo
Year: 2023

description: Talabalarning etnoekologik madaniyatini shakllantirish uchun, milliy va xorijiy tajribalardan olingan tajribalar, ularning o'zaro aloqalarini almashishini ta'minlashda katta ahamiyatga ega bo'ladi. Bu tajribalar orqali talabalarning mamlakatlar tabiiy resurslari, ekologik muhit va madaniyati haqida bilimlarini oshirish, ularni global muhit muammo va yechimlariga oid fikrlashda hamda dunyo miqyosidagi muhim muammolarga oid o'z fikrlarini ifodalashga imkoniyat yaratadi.
Forecasting the Maxima of Solar Cycle 24 with Coronal Fe XIV Emission
Creators: name: Altrock, Richard C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The onset of the "Rush to the Poles" of polar-crown prominences and their associated coronal emission is a harbinger of solar maximum. Altrock (Solar Phys. 216, 343, 2003) showed that the "Rush" was well-observed at 1.15 Ro in the Fe XIV corona at the Sacramento Peak site of the National Solar Observatory prior to the maxima of Cycles 21 to 23. The data show that solar maximum in those cycles occurred when the center line of the Rush reached a critical latitude of 76 +- 2°. Furthermore, in the previous three cycles solar maximum occurred when the highest number of Fe XIV emission features per day (averaged over 365 days and both hemispheres) first reached latitudes 20 +- 1.7°. Cycle 24 displays an intermittent Rush that is only well-defined in the northern hemisphere. In 2009 an initial slope of 4.6°/yr was found in the north, compared to an average of 9.4 +- 1.7 °/yr in the previous cycles. An early fit to the Rush would have reached 76° at 2014.6. However, in 2010 the slope increased to 7.5°/yr (an increase did not occur in the previous three cycles). Extending that rate to 76 +- 2° indicates that the solar maximum in the northern hemisphere already occurred at 2011.6 +- 0.3. In the southern hemisphere the Rush to the Poles, if it exists, is very poorly defined. A linear fit to several maxima would reach 76° in the south at 2014.2. In 1999, persistent Fe XIV coronal emission known as the "extended solar cycle" appeared near 70° in the north and began migrating towards the equator at a rate 40% slower than the previous two solar cycles. However, in 2009 and 2010 an acceleration occurred. Currently the greatest number of emission features is at 21° in the North and 24°in the South. This indicates that solar maximum is occurring now in the North but not yet in the South.
description: Published in Solar Physics Online First, http://www.springer.com/alert/urltracking.do?id=Lf024d4Mb7d2d4S29a79e8, 7 pages, 4 figures, minor changes made in accord with remarks by referee and editor
Researcher Perspectives On Publication And Peer Review Of Data
Creators: name: Kratz, John Ernest
name: Strasser, Carly
Publisher: name: Zenodo
Year: 2014
Subjects: data publication

description: Data "publication'' seeks to appropriate the prestige of authorship in the peer-reviewed literature to reward researchers who create useful and well-documented datasets. The scholarly communication community has embraced data publication as an incentive to document and share data. But, numerous new and ongoing experiments in implementation have not yet resolved what a data publication should be, when data should be peer-reviewed, or how data peer review should work. While researchers have been surveyed extensively regarding data management and sharing, their perceptions and expectations of data publication are largely unknown. To bring this important yet neglected perspective into the conversation, we surveyed $\sim250$ researchers across the sciences and social sciences-- asking what expectations "data publication'' raises and what features would be useful to evaluate the trustworthiness, evaluate the impact, and enhance the prestige of a data publication. We found that researcher expectations of data publication center on availability, generally through an open database or repository. Few respondents expected published data to be peer-reviewed, but peer-reviewed data enjoyed much greater trust and prestige. The importance of adequate metadata was acknowledged, in that almost all respondents expected data peer review to include evaluation of the data's documentation. Formal citation in the reference list was affirmed by most respondents as the proper way to credit dataset creators. Citation count was viewed as the most useful measure of impact, but download count was seen as nearly as valuable. These results offer practical guidance for data publishers seeking to meet researcher expectations and enhance the value of published data.
A quantitative method for determining the robustness of complex networks
Creators: name: Qin, Jun
name: Wu, Hongrun
name: Tong, Xiaonian
name: Zheng, Bojin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Most current studies estimate the invulnerability of complex networks using a qualitative method that analyzes the inaccurate decay rate of network efficiency. This method results in confusion over the invulnerability of various types of complex networks. By normalizing network efficiency and defining a baseline, this paper defines the invulnerability index as the integral of the difference between the normalized network efficiency curve and the baseline. This quantitative method seeks to establish a benchmark for the robustness and fragility of networks and to measure network invulnerability under both edge and node attacks. To validate the reliability of the proposed method, three small-world networks were selected as test beds. The simulation results indicate that the proposed invulnerability index can effectively and accurately quantify network resilience. The index should provide a valuable reference for determining network invulnerability in future research.
Relativistic Theory of Elastic Bodies in the Presence of Gravitational Waves
Creators: name: Hudelist, Mario
name: Mieling, Thomas
name: Palenta, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The equations of motion governing small elastic oscillations of materials, induced by gravitational waves, are derived from the general framework of Carter and Quintana. In transverse-traceless gauge, no bulk forces are present, and the gravitational wave is found to act as an effective surface traction. For thin rods, an equivalent description is given, in which there is no surface traction, but a bulk acceleration, which is related to the Riemann curvature of the gravitational wave. The resulting equations are compared to those of the Synge-Bennoun elasticity theory.
description: 9 pages
Exact self-accelerating cosmologies in the ghost-free massive gravity -- the detailed derivation
Creators: name: Volkov, Mikhail S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present the detailed derivation of the recently announced most general cosmological solution with homogeneous and isotropic metric in the ghost-free massive gravity theory. We use the standard parametrization of the theory in terms of the matrix square root, and then show how the same results are recovered within the tetrad formulation. The solution obtained includes the matter source, it exists for generic values of the theory parameters, and it describes a universe that can be spatially open, closed, or flat, and that shows the late time acceleration due to the effective cosmological term mimicked by the graviton mass. The Stückelberg fields are inhomogeneous, which could probably give rise to inhomogeneous perturbations of the homogeneous and isotropic backgrounds, although this effect should be suppressed by the smallness of the graviton mass.
description: 20 pages, a misprint corrected, to appear in Phys.Rev.D
O Atendimento Humanizado na Atenção Primária à Saúde da Criança
Creators: name: Deus, Suellen Batista Mariano de
name: Santos, Shirley de Souza
name: Barros, Francisco Hilângelo Vieira
name: Rocha, Hidemburgo Gonçalves
name: Freitas, Lindeberg Rocha
Publisher: name: Zenodo
Year: 2023

description: Objetivou-se identificar fatores que podem interferir na assistência saúde à criança na atenção primária à saúde pela ótica dos princípios e diretrizes da política nacional de humanização. Revisão integrativa da literatura, em que a busca foi realizada de outubro de 2016 a janeiro de 2017 na Biblioteca Virtual de Saúde (BVS), nas seguintes bases de dados: Literatura Latino Americana e do Caribe em Ciências da Saúde (LILACS) e Medical Literature Analysis and Retrieval System Online (MEDLINE) e Base de Dados de Enfermagem (BDENF).  Os descritores utilizados para a busca foram "saúde da criança" e "atenção primária à saúde". ,De acordo com a análise. Os estudos formularam cinco categorias que expressam os fatores que têm interferido na assistência à saúde da criança na Atenção Primária: despreparo profissional, carência de recursos materiais e dificuldades no acesso, fragilidades na comunicação entre os níveis de atenção à saúde e ausência de acolhimento. Evidencia-se que os fatores que podem dificultar a assistência à saúde da criança englobam desde falhas no âmbito da gestão, estrutura e competência profissional, fato que leva ao predomínio do modelo biomédico. No tocante para que haja uma assistência de qualidade de acordo com os princípios e diretrizes na PNH, é importante que os profissionais considerem a criança em meio a um contexto familiar, social, cultural e econômico.
What Does "Data Publication" Mean To Researchers?
Creators: name: Kratz, John Ernest
name: Strasser, Carly
Publisher: name: Zenodo
Year: 2014
Subjects: data publication

description: Data “publication” attempts to appropriate for data the prestige of publication in the scholarly literature. While the scholarly communication community substantially endorses the idea, it hasn’t fully resolved what a data publication should look like or how data peer review should work. To contribute an important and neglected perspective on these issues, we surveyed ~250 researchers across the sciences and social sciences, asking what expectations “data publication” raises and what features would be useful to evaluate the trustworthiness and impact of a data publication and the contribution of its creator(s).
Theory of the Spin Seebeck Effect
Creators: name: Adachi, Hiroto
name: Uchida, Ken-ichi
name: Saitoh, Eiji
name: Maekawa, Sadamichi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The spin Seebeck effect refers to the generation of a spin voltage caused by a temperature gradient in a ferromagnet, which enables the thermal injection of spin currents from the ferromagnet into an attached nonmagnetic metal over a macroscopic scale of several millimeters. The inverse spin Hall effect converts the injected spin current into a transverse charge voltage, thereby producing electromotive force as in the conventional charge Seebeck device. Recent theoretical and experimental efforts have shown that the magnon and phonon degrees of freedom play crucial roles in the spin Seebeck effect. In this article, we present the theoretical basis for understanding the spin Seebeck effect and briefly discuss other thermal spin effects.
description: 39 pages, 15 figures
Indestructibility of compact spaces
Creators: name: Dias, Rodrigo R.
name: Tall, Franklin D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54D30, 03E55, 54D20, 54F05, 54G20, 91A44

description: In this article we investigate which compact spaces remain compact under countably closed forcing. We prove that, assuming the Continuum Hypothesis, the natural generalizations to $ω_1$-sequences of the selection principle and topological game versions of the Rothberger property are not equivalent, even for compact spaces. We also show that Tall and Usuba's "$\aleph_1$-Borel Conjecture" is equiconsistent with the existence of an inaccessible cardinal.
description: 18 pages