cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Συμπεριφορική Επιδημιολογία: Διερευνητική Ανασκόπηση για τη Διαχρονική Εξέλιξη του Επιστημονικού Πεδίου
title: Behavioral Epidemiology: Scoping Review of the Evolution of the Scientific Field
titleType: AlternativeTitle
Creators: name: Ζιώτη, Ιωάννα
name: Κιαουλιά, Μαλαματένια
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Συμπεριφορική επιδημιολογία
behavioral epidemiology
behavioural epidemiology
Mεταδοτικά νοσήματα
Mη μεταδοτικά νοσήματα
Διαχρονική εξέλιξη
COVID-19

description: Η παρούσα εργασία αφορά σε διερευνητική βιβλιογραφική ανασκόπηση με θέμα “Συμπεριφορική Επιδημιολογία: η διαχρονική εξέλιξη του επιστημονικού πεδίου”. Σκοπός της εργασίας αποτελεί η διερευνητική προσέγγιση των όρων “behavioural epidemiology” (βρετανικός όρος) και “behavioral epidemiology” (αμερικάνικος όρος). Ως επιμέρους στόχος ορίστηκε η κατηγοριοποίηση των αποτελεσμάτων που αναδύονται σε μηχανές αναζήτησης και η περαιτέρω συνοπτική περιγραφή τους. Έγιναν δύο ξεχωριστές αναζητήσεις στο google, μια για τον όρο “behavioural epidemiology” και άλλη μια για τον όρο “behavioral epidemiology”. Στο πλαίσιο των περιορισμών της παρούσας εργασίας κρίθηκε σκόπιμο να συμπεριληφθούν οι πέντε πρώτες σελίδες από κάθε αναζήτηση. Στη συνέχεια τα αποτελέσματα κατηγοριοποιήθηκαν σε α. άρθρα, β. βιβλία, γ. διπλωματικές διατριβές δ. ακαδημαϊκοί φορείς/ερευνητικές ομάδες και ε. άλλα (π.χ. θέσεις εργασίας). Τα αποτελέσματα έδειξαν ότι το επιστημονικό πεδίο της συμπεριφορικής επιδημιολογίας επικεντρώνεται στην ελαχιστοποίηση των παραγόντων κινδύνου που προκαλούν, τις νόσους, την καλύτερη ανταπόκριση του ανθρώπου σε μεταδοτικά, μη μεταδοτικά νοσήματα και την υιοθέτηση μίας σωστής συμπεριφοράς. Συμπερασματικά εκφράζεται η ανάγκη για περαιτέρω έρευνα και μελλοντική εξέλιξη του πεδίου της συμπεριφορικής επιδημιολογίας.
Interplay of Reggeon and photon in pA collisions
Creators: name: Yee, H.-U.
name: Zahed, I.
name: Basar, G.
name: Kharzeev, D.E.
Publisher: name: American Physical Society
Year: 2017

description: We discuss the effects of the electromagnetic interaction in high-energy proton collisions with nuclei of large Z at strong coupling λ=g2Nc. Using the holographic dual limit of large Nc>λ1, we describe the Reggeon exchange as a twisted surface and show that it gets essentially modified by the electromagnetic interaction.
Non-uniform magnetic system driven by non-magnetic ion substitution in CaRu1-xScxO3:Two-component analysis
Creators: name: Yamamoto, Takafumi D.
name: Okazaki, Ryuji
name: Taniguchi, Hiroki
name: Terasaki, Ichiro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have studied magnetic and transport properties in polycrystalline CaRu1-xScxO3 for 0 =< x =< 0.20 in order to clarify the substitution effects of a non-magnetic trivalent ion. We find that a ferromagnetic transition with Tc = 30 K is observed in Sc-substituted samples. The composition dependence of the Curie-Weiss temperature implies that the magnetic susceptibility has a paramagnetic contribution with negative theta and a ferromagnetic contribution with positive theta. The field dependence of magnetization at 2 K is also understood as a summation of the ferromagnetic and paramagnetic components. These results suggest that CaRu1-xScxO3 is a non-uniform magnetic system. The relationship between the ferromagnetic ordering and the transport properties is also discussed.
description: 13 pages, 6 figures
An Empirical Investigation into the Use of Image Captioning for Automated Software Documentation
Creators: name: Moran, Kevin
name: Yachnes, Ali
name: Purnell, George
name: Mahmud, Junayed
name: Tufano, Michele
name: Bernal-Cárdenas, Carlos
name: Poshyvanyk, Denys
name: H'Doubler, Zach
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Existing automated techniques for software documentation typically attempt to reason between two main sources of information: code and natural language. However, this reasoning process is often complicated by the lexical gap between more abstract natural language and more structured programming languages. One potential bridge for this gap is the Graphical User Interface (GUI), as GUIs inherently encode salient information about underlying program functionality into rich, pixel-based data representations. This paper offers one of the first comprehensive empirical investigations into the connection between GUIs and functional, natural language descriptions of software. First, we collect, analyze, and open source a large dataset of functional GUI descriptions consisting of 45,998 descriptions for 10,204 screenshots from popular Android applications. The descriptions were obtained from human labelers and underwent several quality control mechanisms. To gain insight into the representational potential of GUIs, we investigate the ability of four Neural Image Captioning models to predict natural language descriptions of varying granularity when provided a screenshot as input. We evaluate these models quantitatively, using common machine translation metrics, and qualitatively through a large-scale user study. Finally, we offer learned lessons and a discussion of the potential shown by multimodal models to enhance future techniques for automated software documentation.
description: Published in the Proceedings of the 29th IEEE International Conference on Software Analysis, Evolution and Reengineering (SANER'22), Honolulu, Hawaii, March 15-18, 2022, pp. 514-525
Schwinger-Keldysh formalism on the lattice: A faster algorithm and its application to field theory
Creators: name: Başar, G.
name: Alexandru, A.
name: Bedaque, P.F.
name: Ridgway, G.
Publisher: name: American Physical Society
Year: 2017

description: A new algorithm is developed allowing the Monte Carlo study of a 1+1-dimensional theory in real time. The main algorithmic development is to avoid the explicit calculation of the Jacobian matrix and its determinant in the update process. This improvement has a wide applicability and reduces the cost of the update in thimble-inspired calculations from O(N3) to less than O(N2). As an additional feature, the algorithm leads to improved Monte Carlo proposals. We exemplify the use of the algorithm to the real-time dynamics of a scalar φ4 theory with weak and strong couplings.
Learning Preference Models for Autonomous Mobile Robots in Complex Domains
Creators: name: Silver, David
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Achieving robust and reliable autonomous operation even in complex unstructured environments is a central goal of field robotics. As the environments and scenarios to which robots are applied have continued to grow in complexity, so has the challenge of properly defining preferences and tradeoffs between various actions and the terrains they result in traversing. These definitions and parameters encode the desired behavior of the robot; therefore their correctness is of the utmost importance. Current manual approaches to creating and adjusting these preference models and cost functions have proven to be incredibly tedious and time-consuming, while typically not producing optimal results except in the simplest of circumstances.
This thesis presents the development and application of machine learning techniques that automate the construction and tuning of preference models within complex mobile robotic systems. Utilizing the framework of inverse optimal control, expert examples of robot behavior can be used to construct models that generalize demonstrated preferences and reproduce similar behavior. Novel learning from demonstration approaches are developed that offer the possibility of significantly reducing the amount of human interaction necessary to tune a system, while also improving its final performance. Techniques to account for the inevitability of noisy and imperfect demonstration are presented, along with additional methods for improving the efficiency of expert demonstration and feedback.
The effectiveness of these approaches is confirmed through application to several real world domains, such as the interpretation of static and dynamic perceptual data in unstructured environments and the learning of human driving styles and maneuver preferences. Extensive testing and experimentation both in simulation and in the field with multiple mobile robotic systems provides empirical confirmation of superior autonomous performance, with less expert interaction and no hand tuning. These experiments validate the potential applicability of the developed algorithms to a large variety of future mobile robotic systems.
Monte Carlo calculations of the finite density Thirring model
Creators: name: Ridgway, G.W.
name: Bedaque, P.F.
name: Warrington, N.C.
name: Başar, G.
name: Alexandru, A.
Publisher: name: American Physical Society
Year: 2017

description: We present results of the numerical simulation of the two-dimensional Thirring model at finite density and temperature. The severe sign problem is dealt with by deforming the domain of integration into complex field space. This is the first example where a fermionic sign problem is solved in a quantum field theory by using the holomorphic gradient flow approach, a generalization of the Lefschetz thimble method.
Tensor Spectral Clustering for Partitioning Higher-order Network Structures
Creators: name: Benson, Austin R.
name: Gleich, David F.
name: Leskovec, Jure
Publisher: name: arXiv
Year: 2015
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: Spectral graph theory-based methods represent an important class of tools for studying the structure of networks. Spectral methods are based on a first-order Markov chain derived from a random walk on the graph and thus they cannot take advantage of important higher-order network substructures such as triangles, cycles, and feed-forward loops. Here we propose a Tensor Spectral Clustering (TSC) algorithm that allows for modeling higher-order network structures in a graph partitioning framework. Our TSC algorithm allows the user to specify which higher-order network structures (cycles, feed-forward loops, etc.) should be preserved by the network clustering. Higher-order network structures of interest are represented using a tensor, which we then partition by developing a multilinear spectral method. Our framework can be applied to discovering layered flows in networks as well as graph anomaly detection, which we illustrate on synthetic networks. In directed networks, a higher-order structure of particular interest is the directed 3-cycle, which captures feedback loops in networks. We demonstrate that our TSC algorithm produces large partitions that cut fewer directed 3-cycles than standard spectral clustering algorithms.
description: SDM 2015
Search for Transient, Monochromatic Light from the Galactic Plane
Creators: name: Marcy, Geoffrey W.
name: Tellis, Nathaniel K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: The Galactic Plane was searched for transient, monochromatic light at optical and near-IR wavelengths to detect pulses shorter than 1 sec. An objective-prism Schmidt telescope and CMOS camera were used to observe 973 square degrees along the Galactic Plane within a strip 2.1 deg wide. The non-detections of laser pulses from the Galactic Plane add to the non-detections from more than 5000 stars. The absence of extraterrestrial beacons reveals more of a SETI desert at optical and radio wavelengths.
description: 24 pages
Near-cancellation of up- and down-gradient momentum transport in forced magnetized shear-flow turbulence
Creators: name: Tripathi, B.
name: Fraser, A. E.
name: Terry, P. W.
name: Zweibel, E. G.
name: Pueschel, M. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Visco-resistive magnetohydrodynamic turbulence, driven by a two-dimensional unstable shear layer that is maintained by an imposed body force, is examined by decomposing it into dissipationless linear eigenmodes of the initial profiles. The down-gradient momentum flux, as expected, originates from the large-scale instability. However, continual up-gradient momentum transport by large-scale linearly stable but nonlinearly excited eigenmodes is identified, and found to nearly cancel the down-gradient transport by unstable modes. The stable modes effectuate this by depleting the large-scale turbulent fluctuations via energy transfer to the mean flow. This establishes a physical mechanism underlying the long-known observation that coherent vortices formed from nonlinear saturation of the instability reduce turbulent transport and fluctuations, as such vortices are composed of both the stable and unstable modes, which are nearly equal in their amplitudes. The impact of magnetic fields on the nonlinearly excited stable modes is then quantified. Even when imposing a strong magnetic field that almost completely suppresses the instability, the up-gradient transport by the stable modes is at least two-thirds of the down-gradient transport by the unstable modes, whereas for weaker fields, this fraction reaches up to $98\%$. These effects are persistent with variations in magnetic Prandtl number and forcing strength. Finally, continuum modes are shown to be energetically less important, but essential for capturing the magnetic fluctuations and Maxwell stress. A simple analytical scaling law is derived for their saturated turbulent amplitudes. It predicts the fall-off rate as the inverse of the Fourier wavenumber, a property which is confirmed in numerical simulations.
description: Accepted for publication in Physics of Plasmas; 43 pages, 15 figures; invited as part of the Special Topic: Papers from the 2022 Sherwood Fusion Theory Conference
title:  La capacità di scegliere. Critica alla razionalità strumentale
Creators: name: Pendenza, Massimo
Publisher: name: Roma TrE-Press
Year: 2016

description: The article discusses the possibility of going beyond the cognitive paradigm in sociology of rational choice in terms of a richer and more complex definition of “individual” and his “capacity” to choose. As we will show, the individual does not choose only in response to logical and rational reasoning, but also and above all, in relation to his cultural skills and relative context. This means interpreting the future not as the potential outcome of calculation (or at least not only), but also as a capacity to be mastered in view of expected outcomes. The difficulties that young people today are facing in making decisions in era of risk and what public
institutions should aim at to ensure that such skills can be used as resources to control the future, are just two examples of showing how it is still possible nowadays for individuals and the community to plan the future beyond the logic of rational choice.
description: Democrazia e Sicurezza – 2016, n. 2
On reconstructing Proto-Bantu grammar
Creators: name: Bostoen, Koen (Ed.)
name: Schryver, Gilles-Maurice De (Ed.)
name: Guérois, Rozenn (Ed.)
name: Pacchiarotti, Sara (Ed.)
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Proto-Bantu
subject: Niger-Congo
subject: phonology
subject: morphology
subject: syntax
subject: 400 Sprache::410 Linguistik::410 Linguistik

description: This book is about reconstructing the grammar of Proto-Bantu, the ancestral language at the origin of current-day Bantu languages. While Bantu is a low-level branch of Niger-Congo, the world’s biggest phylum, it is still Africa’s biggest language family. This edited volume attempts to retrieve the phonology, morphology and syntax used by the earliest Bantu speakers to communicate with each other, discusses methods to do so, and looks at issues raised by these academic endeavours. It is a collective effort involving a fine mix of junior and senior scholars representing several generations of expert historical-comparative Bantu research. It is the first systematic approach to Proto-Bantu grammar since Meeussen’s Bantu Grammatical Reconstructions (1967). Based on new bodies of evidence from the last five decades, most notably from northwestern Bantu languages, this book considerably transforms our understanding of Proto-Bantu grammar and offers new methodological approaches to Bantu grammatical reconstruction.
Quantum geometry of resurgent perturbative/nonperturbative relations
Creators: name: Dunne, G.V.
name: Ünsal, M.
name: Basar, G.
Publisher: name: Springer Verlag
Year: 2017

description: For a wide variety of quantum potentials, including the textbook ‘instanton’ examples of the periodic cosine and symmetric double-well potentials, the perturbative data coming from fluctuations about the vacuum saddle encodes all non-perturbative data in all higher non-perturbative sectors. Here we unify these examples in geometric terms, arguing that the all-orders quantum action determines the all-orders quantum dual action for quantum spectral problems associated with a classical genus one elliptic curve. Furthermore., for a special class of genus one potentials this relation is particularly simple: this class includes the cubic oscillator, symmetric double-well, symmetric degenerate triple-well, and periodic cosine potential. These are related to the Chebyshev potentials, which are in turn related to certain N = 2 supersymmetric quantum field theories, to mirror maps for hypersurfaces in projective spaces, and also to topological c = 3 Landau-Ginzburg models and ‘special geometry’. These systems inherit a natural modular structure corresponding to Ramanujan’s theory of elliptic functions in alternative bases, which is especially important for the quantization. Insights from supersymmetric quantum field theory suggest similar structures for more complicated potentials, corresponding to higher genus. Our approach is very elementary, using basic classical geometry combined with all-orders WKB.
An XMM-Newton view of FeKα in HMXBs
Creators: name: Giménez-García, A.
name: Torrejón, J. M.
name: Eikmann, W.
name: Martínez-Núñez, S.
name: Oskinova, L. M.
name: Rodes-Roca, J. J.
name: Bernabéu, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a comprehensive analysis of the whole sample of available XMM-Newton observations of High Mass X-ray Binaries (HMXBs) until August, 2013, focusing on the FeKα emission line. This line is a key tool to better understand the physical properties of the material surrounding the X-ray source within a few stellar radii (the circumstellar medium). We have collected observations from 46 HMXBs, detecting FeKα in 21 of them. We have used the standard classification of HMXBs to divide the sample in different groups. We find that: (1) FeKα is centred at a mean value of 6.42 keV. Considering the instrumental and fits uncertainties, this value is compatible with ionization states lower than FeXVIII. (2) The flux of the continuum is well correlated with the flux of the line, as expected. Eclipse observations show that the Fe fluorescence emission comes from an extended region surrounding the X-ray source. (3) FeKα is narrow (width lower than 0.15keV), reflecting that the reprocessing material does not move at high speeds. We attempt to explain the broadness of the line in terms of three possible broadening phenomena: line blending, Compton scattering and Doppler shifts (with velocities of the reprocessing material V=1000-2000 km/s). (4) The equivalent hydrogen column (NH) directly correlates with the EW of FeKα, displaying clear similarities to numerical simulations. It highlights the strong link between the absorbing and the fluorescent matter. The obtained results clearly point to a very important contribution of the donors wind in the FeKα emission and the absorption when the donor is a supergiant massive star.
description: Accepted for publication in A&A. 13 pages, 16 figures + Appendices
An Empirical Investigation into the Reproduction of Bug Reports for Android Apps
Creators: name: Johnson, Jack
name: Mahmud, Junayed
name: Wendland, Tyler
name: Moran, Kevin
name: Rubin, Julia
name: Fazzini, Mattia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: One of the key tasks related to ensuring mobile app quality is the reporting, management, and resolution of bug reports. As such, researchers have committed considerable resources toward automating various tasks of the bug management process for mobile apps, such as reproduction and triaging. However, the success of these automated approaches is largely dictated by the characteristics and properties of the bug reports they operate upon. As such, understanding mobile app bug reports is imperative to drive the continued advancement of report management techniques. While prior studies have examined high-level statistics of large sets of reports, we currently lack an in-depth investigation of how the information typically reported in mobile app issue trackers relates to the specific details generally required to reproduce the underlying failures. In this paper, we perform an in-depth analysis of 180 reproducible bug reports systematically mined from Android apps on GitHub and investigate how the information contained in the reports relates to the task of reproducing the described bugs. In our analysis, we focus on three pieces of information: the environment needed to reproduce the bug report, the steps to reproduce (S2Rs), and the observed behavior. Focusing on this information, we characterize failure types, identify the modality used to report the information, and characterize the quality of the information within the reports. We find that bugs are reported in a multi-modal fashion, the environment is not always provided, and S2Rs often contain missing or non-specific enough information. These findings carry with them important implications on automated bug reproduction techniques as well as automated bug report management approaches more generally.
description: Published in the Proceedings of the 29th IEEE International Conference on Software Analysis, Evolution and Reengineering (SANER'22), Honolulu, Hawaii, March 15-18, 2022, pp. 321-332
Encyclopaedia of German diatheses
Creators: name: Cysouw, Michael
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: "valency alternation"
subject: role-remappings
subject: antipassives
subject: applicatives
subject: causatives
subject: 400 Sprache::410 Linguistik::410 Linguistik

description: Synopsis: Diathesis ("valency alternation") is a sentence structure that reshapes the roles of a verb. The prototypical example of such a diathesis is the well-known passive. However, there are very many other such role-remappings, like antipassives, applicatives, causatives, etc. This book presents an encyclopaedic survey of diathesis in German. The objective is to catalogue all diatheses that exist in this language. Currently almost 250 different German diatheses are described in this book, some highly productive, some only attested for a handful of verbs. The main goal of this book is to present this wealth of grammatical possibility in a unified manner, while at the same time attempting to classify and organise this diversity. A summary of the about 80 most prominent diatheses is also provided, including many newly-minted German names, because most these diatheses did not have a German name yet. It might come as a surprise that there are so many different diatheses in German, but my impression is that in this respect German is no exception among the world's languages. I expect that all languages have a similar abundance of different ways in which to construe a sentence around a lexical predicate. In a sense, a diathesis allows for the expression of a distinct perspective on the event described, something that is arguably a common desire of any language user. Except for diathesis this book also aims to completely catalogue its counterpart: epithesis. An epithesis is a derived sentence structure in which the marking of the verb roles remains constant. Basically, these are the grammaticalised constructions expressing tense-aspect-mood-evidentiality in German. The list of major epitheses is also quite long (about 40 constructions), but it is quite a bit smaller than the list of major diatheses (about 80 constructions). This indicates that from a purely grammatical perspective, diathesis ("grammatical voice") is about a two-times more elaborate topic than epithesis ("tense-aspect-mood marking") in German.
Sensitivity of ring analysis to near-surface magnetism
Creators: name: Corbard, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: While magnetic field has only second order effects on global sound waves, it can affect the mode frequencies and flow fields inferred using local helioseismology. A strong localized field can bias our results when one try to infer global scale flows such as the meridional circulation. On the other hand, one important object of research in this area is to determine whether one can detect changes in frequencies or sub-surface flow fields that could be a precursor of surface magnetic events. In this paper we review recent development in this area focusing on results obtained with the ring-diagram analysis technique.
description: 2 pages, 1 figure, Proceedings of the HELAS NA3-4 Workshop held in Birmingham, U.K. (2009)
title: A half century of Romance linguistics
title: Selected proceedings of the 50th Linguistic Symposium on Romance Languages
titleType: Subtitle
Creators: name: Bullock, Barbara E. (Ed.)
name: Russi, Cinzia (Ed.)
name: Toribio, Almeida Jacqueline (Ed.)
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: proceedings articles
subject: 50th Linguistic Symposium on Romance Languages
subject: LSRL 50
subject: 400 Sprache::410 Linguistik::410 Linguistik

description: Synopsis: The present volume presents a selection of the revised and peer-reviewed proceedings articles of the 50th Linguistic Symposium on Romance Languages (LSRL 50) which was hosted virtually by the faculty and students from the University of Texas at Austin. With contributions from rising and senior scholars from Europe and the Americas, the volume demonstrates the breadth of research in contemporary Romance linguistics with articles that apply corpus-based and laboratory methods, as well as theory, to explore the structure, use, and development of the Romance languages. The articles cover a wide range of fields including morphosyntax, semantics, language variation and change, sociophonetics, historical linguistics, language acquisition, and computational linguistics. In an introductory article, the editors document the sudden transition of LSRL 50 to a virtual format and acknowledge those who helped them to ensure the continuity of this annual scholarly meeting.
Use of survival analysis and simulation to improve maintenance planning of high voltage instrument transformers in the Dutch transmission system
Creators: name: Khuntia, Swasti R.
name: Zghal, Fatma
name: Bhuyan, Ranjan
name: Schenkel, Erik
name: Duvivier, Paul
name: Blancke, Olivier
name: Krasny, Witold
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This paper describes the use of survival analysis and simulation to model the lifetime of high voltage instrument transformers in the Dutch transmission sys-tem. To represent asset aging, the non-parametric Kaplan-Meier method is used to enable the fitting of Weibull distribution. Such an approach is implemented on three different voltage levels, namely 110kV, 150kV, and 220/380kV. Real failure and inspection data is used to achieve a realistic failure model of the instrument trans-formers. Failure and maintenance data occurring between 1989 and 2021 have been used for this study. In spite of missing and low-quality data, a rich failure database could still be prepared. This study also offers insights into factors (i.e., voltage level, in-service age) influencing the remaining life from both graphical survival function and parametric Weibull distribution analysis. Based on the derived statistics, future possible maintenance planning scenarios are simulated under a complex system modelling framework in a digital twin enabled platform. Eventually, the scenarios are evaluated in terms of replacement costs (CAPEX), inspection hours, and unavailability hours.
description: 12 pages, 5 figures, 16th WCEAM Proceedings 2022
Study of symmetry breaking in a relativistic Bose gas using the contraction algorithm
Creators: name: Alexandru, A.
name: Ridgway, G.W.
name: Warrington, N.C.
name: Bedaque, P.
name: Başar, G.
Publisher: name: American Physical Society
Year: 2016

description: A relativistic Bose gas at finite density suffers from a sign problem that makes direct numerical simulations infeasible. One possible solution to the sign problem is to reexpress the path integral in terms of Lefschetz thimbles. Using this approach we study the relativistic Bose gas both in the symmetric phase (low density) and the spontaneously broken phase (high density). In the high-density phase we break explicitly the symmetry and determine the dependence of the order parameter on the breaking. We study the relative contributions of the dominant and subdominant thimbles in this phase. We find that the subdominant thimble only contributes substantially when the explicit symmetry breaking is small, a regime that is dominated by finite volume effects. In the regime relevant for the thermodynamic limit, this contribution is negligible.
title: Germanic syntax
title: A constraint-based view
titleType: Subtitle
Creators: name: Müller, Stefan
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: syntactic structures
subject: Germanic languages
subject: HPSG light
subject: 400 Sprache::410 Linguistik::410 Linguistik

description: Synopsis: This book is an introduction to the syntactic structures that can be found in the Germanic languages. The analyses are couched in the framework of HPSG light, which is a simplified version of HPSG that uses trees to depict analyses rather than complicated attribute value matrices. The book is written for students with basic knowledge about case, constituent tests, and simple phrase structure grammars (advanced BA or MA level) and for researchers with an interest in the Germanic languages and/or an interest in Head-Driven Phrase Structure Grammar/Sign-Based Construction Grammar without having the time to deal with all the details of these theories.
Driving a pure spin current from nuclear-polarization gradients
Creators: name: Harmon, Nicholas J.
name: Flatté, Michael E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A pure spin current is predicted to occur when an external magnetic field and a linearly inhomogeneous spin-only field are appropriately aligned. Under these conditions (such as originate from nuclear contact hyperfine fields that do not affect orbital motion) a linear, spin-dependent dispersion for free electrons emerges from the Landau Hamiltonian. The result is that spins of opposite orientation flow in opposite directions giving rise to a pure spin current. A classical model of the spin and charge dynamics reveals intuitive aspects of the full quantum mechanical solution. We propose optical orientation or electrical polarization experiments to demonstrate this outcome.
description: 5 pages, 3 figures. Accepted in Phys. Rev. B
Fast estimator of Jacobians in the Monte Carlo integration on Lefschetz thimbles
Creators: name: Alexandru, A.
name: Ridgway, G.W.
name: Bedaque, P.F.
name: Başar, G.
name: Warrington, N.C.
Publisher: name: American Physical Society
Year: 2016

description: A solution to the sign problem is the so-called "Lefschetz thimble approach" where the domain of integration for field variables in the path integral is deformed from the real axis to a submanifold in the complex space. For properly chosen submanifolds ("thimbles") the sign problem disappears or is drastically alleviated. The parametrization of the thimble by real coordinates requires the calculation of a Jacobian with a computational cost of order O(V3), where V is proportional to the spacetime volume. In this paper we propose two estimators for this Jacobian with a computational cost of order O(V). We discuss analytically the regimes where we expect the estimator to work and show numerical examples in two different models.
Additional file 2 of Exosome, the glass slipper for Cinderella of cancer—bladder cancer?
Creators: name: Yang, Yuanyuan
name: Miao, Lintao
name: Lu, Yuchao
name: Sun, Yi
name: Wang, Shaogang
Publisher: name: figshare
Year: 2024
Subjects: subject: Biophysics
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 2: Table S1. Overview of exosomes and their contents identified in bladder cancer.
RegTraffic: A Regression Based Traffic Simulator for Spatiotemporal Traffic Modeling, Simulation and Visualization
Creators: name: Mostafi, Sifatul
name: Alghamdi, Taghreed
name: Elgazzar, Khalid
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Artificial Intelligence (cs.AI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Traffic simulation is a great tool to demonstrate complex traffic structures which can be extremely useful for the planning, development, and management of road traffic networks. Current traffic simulators offer limited features when it comes to interactive and adaptive traffic modeling. This paper presents RegTraffic, a novel interactive traffic simulator that integrates dynamic regression-based spatiotemporal traffic analysis to predict congestion of intercorrelated road segments. The simulator models traffic congestion of road segments depending on neighboring road links and temporal features of the dynamic traffic flow. The simulator provides a user-friendly web interface to select road segments of interest, receive user-defined traffic parameters, and visualize the traffic for the flow of correlated road links based on the user inputs and the underlying correlation of these road links. Performance evaluation shows that RegTraffic can effectively predict traffic congestion with a Mean Squared Error of 1.3 Km/h and a Root Mean Squared Error of 1.71 Km/h. RegTraffic can effectively simulate the results and provide visualization on interactive geographical maps.
The North/South Asymmetry of the Galaxy: Possible Connection to the Vertical Phase Space Snail
Creators: name: Guo, Rui
name: Shen, Juntai
name: Li, Zhao-yu
name: Liu, Chao
name: Mao, Shude
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Galaxy is found to be in disequilibrium based on recent findings of the North/South (N/S) asymmetry and the phase mixing signatures, such as a phase spiral (snail) structure in the vertical phase space ($z-V_{z}$). We show that the N/S asymmetry in a tracer population of dwarfs may be quantitatively modeled with a simple phase snail model superimposed on a smooth equilibrium background. As the phase snail intersects with the $z$ axis, the number density is enhanced, and the velocity dispersion ($σ_{z}$) is decreased relative to the other side of the Galactic plane. Fitting only to the observed asymmetric N/S $σ_{z}$ profiles, we obtain reasonable parameters for the phase space snail and the potential utilized in modeling the background, despite the complex dependence of the model on the potential parameters and the significant selection effects of the data. Both the snail shape and the N/S number density difference given by our best-fit model are consistent with previous observations. The equilibrium background implies a local dark matter density of $0.0151^{+0.0050}_{-0.0051}$ ${\rm M}_{\odot}\,{\rm pc}^{-3}$. The vertical bulk motion of our model is similar to the observation, but with a $\sim$1.2 $\rm km\,s^{-1}$ shift. Our work demonstrates the strong correlation between the phase space snail and the N/S asymmetry. Future observational constraints will facilitate more comprehensive snail models to unravel the Milky Way potential and the perturbation history encoded in the snail feature.
description: 14 pages + Appendix, 10 figures. Accepted for publication on ApJ
Monte Carlo algorithm for simulating fermions on Lefschetz thimbles
Creators: name: Alexandru, A.
name: Bedaque, P.
name: Başar, G.
Publisher: name: American Physical Society
Year: 2016

description: A possible solution of the notorious sign problem preventing direct Monte Carlo calculations for systems with nonzero chemical potential is to deform the integration region in the complex plane to a Lefschetz thimble. We investigate this approach for a simple fermionic model. We introduce an easy to implement Monte Carlo algorithm to sample the dominant thimble. Our algorithm relies only on the integration of the gradient flow in the numerically stable direction, which gives it a distinct advantage over the other proposed algorithms. We demonstrate the stability and efficiency of the algorithm by applying it to an exactly solvable fermionic model and compare our results with the analytical ones. We report a very good agreement for a certain region in the parameter space where the dominant contribution comes from a single thimble, including a region where standard methods suffer from a severe sign problem. However, we find that there are also regions in the parameter space where the contribution from multiple thimbles is important, even in the continuum limit.
Thermomechanics of damageable materials under diffusion:modeling and analysis
Creators: name: Roubicek, Tomas
name: Tomassetti, Giuseppe
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35K55, 35Q74, 74A15, 74R20, 74N10, 74F10, 76S99, 80A17, 80A20

description: We propose a thermodynamically consistent general-purpose model describing diffusion of a solute or a fluid in a solid undergoing possible phase transformations and damage, beside possible visco-inelastic processes. Also heat generation/consumption/transfer is considered. Damage is modelled as rate-independent. The applications include metal-hydrogen systems with metal/hydride phase transformation, poroelastic rocks, structural and ferro/para-magnetic phase transformation, water and heat transport in concrete, and, if diffusion is neglected, plasticity with damage and viscoelasticity, etc. For the ensuing system of partial differential equations and inclusions, we prove existence of solutions by a carefully devised semi-implicit approximation scheme of the fractional-step type.
Percolation leads to finite-size effects on the transition temperature and center of mass energy required for the quark-gluon plasma formation
Creators: name: García, J. C. Texca
name: Herrera, D. Rosales
name: Ramírez, J. E.
name: Téllez, A. Fernández
name: Pajares, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the finite-size effects on the transition temperature associated with the quark-gluon plasma (QGP) formation. From a percolation perspective, the onset of the QGP in high-energy collisions occurs when the spanning cluster of color strings emerges. The principal result presented here is the finite-size effects on the transition temperature expressed as a power law in terms of the nucleon number. We found that the transition temperature is higher for small systems than for large ones. It means that minimal triggering conditions events in pp collisions require about twenty times higher energies than AuAu-PbPb collisions. We also estimate the center of mass energy required for the QGP formation as a function of the nucleon number. Our results are consistent with the minimal center of mass energies at which the QGP has been observed.
description: 6 pages, 4 figures
Thermodynamic instability of topological black holes with nonlinear source
Creators: name: Hendi, S. H.
name: Momennia, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we obtain higher dimensional topological black hole solutions of Einstein-$Λ$ gravity in the presence of a class of nonlinear electrodynamics. First, we calculate the conserved and thermodynamic quantities of ($n+1$)-dimensional asymptotically flat solutions and show that they satisfy the first law of thermodynamics. Also, we investigate the stability of these solutions in the (grand) canonical ensemble. Second, we endow a global rotation to the static Ricci-flat solutions and calculate the conserved quantities of solutions by using the counterterm method. We obtain a Smarr-type formula for the mass as a function of the entropy, the angular momenta and the electric charge, and show that these quantities satisfy the first law of thermodynamics. Then, we perform a stability analysis of the rotating solutions both in the canonical and the grand canonical ensembles.
description: 17 pages with 14 figures, accepted in EPJC
M-Centrality: identifying key nodes based on global position and local degree variation
Creators: name: Ibnoulouafi, Ahmed
name: Haziti, Mohamed El
name: Cherifi, Hocine
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Identifying influential nodes in a network is a major issue due to the great deal of applications concerned, such as disease spreading and rumor dynamics. That is why, a plethora of centrality measures has emerged over the years in order to rank nodes according to their topological importance in the network. Local metrics such as degree centrality make use of a very limited information and are easy to compute. Global metrics such as betweenness centrality exploit the information of the whole network structure at the cost of a very high computational complexity. Recent works have shown that combining multiple metrics is a promising strategy to quantify the node's influential ability. Our work is in this line. In this paper, we introduce a multi-attributes centrality measure called M-Centrality that combines the information on the position of the node in the network with the local information on its nearest neighborhood. The position is measured by the K-shell decomposition, and the degree variation in the neighborhood of the node quantifies the influence of the local context. In order to examine the performances of the proposed measure, we conduct experiments on small and large scale real-world networks from the perspectives of transmission dynamics and network connectivity. According to the empirical results, the M-Centrality outperforms its alternatives in identifying both influential spreaders and nodes essential to maintain the network connectivity. In addition, its low computational complexity makes it easily applied to large scale networks.
Open Quantum Random Walks and Quantum Markov chains on Trees I: Phase transitions
Creators: name: Mukhamedov, Farrukh
name: Souissi, Abdessatar
name: Hamdi, Tarek
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 46L53, 46L60, 82B10, 81Q10

description: In the present paper, we construct QMC (Quantum Markov Chains) associated with Open Quantum Random Walks such that the transition operator of the chain is defined by OQRW and the restriction of QMC to the commutative subalgebra coincides with the distribution $P_ρ$ of OQRW. However, we are going to look at the probability distribution as a Markov field over the Cayley tree. Such kind of consideration allows us to investigated phase transition phenomena associated for OQRW within QMC scheme. Furthermore, we first propose a new construction of QMC on trees, which is an extension of QMC considered in Ref. [10]. Using such a construction, we are able to construct QMCs on tress associated with OQRW. Our investigation leads to the detection of the phase transition phenomena within the proposed scheme. This kind of phenomena appears first time in this direction. Moreover, mean entropies of QMCs are calculated.
description: 17 pages, Open Systems & Information Dynamics (accepted)
Network-based statistical comparison of citation topology of bibliographic databases
Creators: name: Šubelj, Lovro
name: Fiala, Dalibor
name: Bajec, Marko
Publisher: name: arXiv
Year: 2015
Subjects: subject: Digital Libraries (cs.DL)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Modern bibliographic databases provide the basis for scientific research and its evaluation. While their content and structure differ substantially, there exist only informal notions on their reliability. Here we compare the topological consistency of citation networks extracted from six popular bibliographic databases including Web of Science, CiteSeer and arXiv.org. The networks are assessed through a rich set of local and global graph statistics. We first reveal statistically significant inconsistencies between some of the databases with respect to individual statistics. For example, the introduced field bow-tie decomposition of DBLP Computer Science Bibliography substantially differs from the rest due to the coverage of the database, while the citation information within arXiv.org is the most exhaustive. Finally, we compare the databases over multiple graph statistics using the critical difference diagram. The citation topology of DBLP Computer Science Bibliography is the least consistent with the rest, while, not surprisingly, Web of Science is significantly more reliable from the perspective of consistency. This work can serve either as a reference for scholars in bibliometrics and scientometrics or a scientific evaluation guideline for governments and research agencies.
description: 16 pages, 3 figures, 3 tables