cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Remote teaching data-driven physical modeling through a COVID-19 open ended data challenge
Creators: name: Lagomarsino, Marco Cosentino
name: Pacifico, Guglielmo
name: Firmano, Valerio
name: Bella, Edoardo
name: Benzoni, Pietro
name: Grilli, Jacopo
name: Bassetti, Federico
name: Capuani, Fabrizio
name: Cicuta, Pietro
name: Gherardi, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Physics can be seen as a conceptual approach to scientific problems, a method for discovery, but teaching this aspect of our discipline can be a challenge. We report on a first-time remote teaching experience for a computational physics third-year physics laboratory class taught in the first part of the 2020 COVID-19 pandemic (March-May 2020). To convey a ``physics of data" approach to data analysis and data-driven physical modeling we used interdisciplinary data sources, with an openended ``COVID-19 data challenge" project as the core of the course. COVID-19 epidemiological data provided an ideal setting for motivating the students to deal with complex problems, where there is no unique or preconceived solution. Our results indicate that such problems yield qualitatively different improvements compared to close-ended projects, as well as point to critical aspects in using these problems as a teaching strategy. By breaking the students' expectations of unidirectionality, remote teaching provided unexpected opportunities to promote active work and active learning.
description: revised in the text and references following 1st round of peer review
Revealing puddles of electrons and holes in compensated topological insulators
Creators: name: Borgwardt, N.
name: Lux, J.
name: Vergara, I.
name: Wang, Zhiwei
name: Taskin, A. A.
name: Segawa, Kouji
name: van Loosdrecht, P. H. M.
name: Ando, Yoichi
name: Rosch, A.
name: Grüninger, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Three-dimensional topological insulators harbour metallic surface states with exotic properties. In transport or optics, these properties are typically masked by defect-induced bulk carriers. Compensation of donors and acceptors reduces the carrier density, but the bulk resistivity remains disappointingly small. We show that measurements of the optical conductivity in BiSbTeSe$_2$ pinpoint the presence of electron-hole puddles in the bulk at low temperatures, which is essential for understanding DC bulk transport. The puddles arise from large fluctuations of the Coulomb potential of donors and acceptors, even in the case of full compensation. Surprisingly, the number of carriers appearing within puddles drops rapidly with increasing temperature and almost vanishes around 40 K. Monte Carlo simulations show that a highly non-linear screening effect arising from thermally activated carriers destroys the puddles at a temperature scale set by the Coulomb interaction between neighbouring dopants, explaining the experimental observation semi-quantitatively. This mechanism remains valid if donors and acceptors do not compensate perfectly.
description: 11 pages with 7 figures plus supplemental material (3 pages)
title: Secure by Design at CERT
Creators: name: Touhill, Greg
Publisher: name: Software Engineering Institute, Carnegie Mellon University
Year: 2023

description: The national cybersecurity strategy calls on tech providers to ensure that all their products are secure by design and secure by default. This post highlights the continued and longstanding efforts by the Carnegie Mellon University Software Engineering Institute's CERT Division to ensure security by design in fielded software.
Associations of age with reward delay discounting and response inhibition in adolescents with bipolar disorders
Creators: name: Collins, Paul
name: Urošević, Snežana
name: Youngstrom, Eric A.
name: Luciana, Monica
name: Jensen, Jonathan B.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Bipolar disorders’ (BD) onset before age 18 is a potential marker for a more severe illness course. Adolescence is also a period of significant normative maturation of inhibitory control and reward-relevant decision-making processes, such as decreased delay discounting (i.e., decreased preference for smaller, immediate versus larger, delayed rewards). Adults with BD exhibit elevated delay discounting rates. Very little is known about developmental changes in delay discounting in adolescents with BD, or about associations between inhibitory control and delay discounting in BD. The present study addresses these questions.
Soliton interferometry with very narrow barriers obtained from spatially dependent dressed states
Creators: name: Grimshaw, Callum L.
name: Billam, Thomas P.
name: Gardiner, Simon A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bright solitons in atomic Bose--Einstein condensates are strong candidates for high precision matter-wave interferometry, as their inherent stability against dispersion supports long interrogation times. An analog to a beam splitter is then a narrow potential barrier. A very narrow barrier is desirable for interferometric purposes, but in a typical realisation using a blue-detuned optical dipole potential, the width is limited by the laser wavelength. We investigate a soliton interferometry scheme using the geometric scalar potential experienced by atoms in a spatially dependent dark state to overcome this limit. We propose a possible implementation and numerically probe the effects of deviations from the ideal configuration.
description: 5 figures
A Finite $S$-Matrix
Creators: name: Hannesdottir, Holmfridur
name: Schwartz, Matthew D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: When massless particles are involved, the traditional scattering matrix ($S$-matrix) does not exist: it has no rigorous non-perturbative definition and has infrared divergences in its perturbative expansion. The problem can be traced to the impossibility of isolating single-particle states at asymptotic times. On the other hand, the troublesome non-separable interactions are often universal: in gauge theories they factorize so that the asymptotic evolution is independent of the hard scattering. Exploiting this factorization property, we show how a finite "hard" $S$-matrix, $S_H$, can be defined by replacing the free Hamiltonian with a soft-collinear asymptotic Hamiltonian. The elements of $S_H$ are gauge invariant and infrared finite, and exist even in conformal field theories. One can interpret elements of $S_H$ alternatively 1) as elements of the traditional $S$-matrix between dressed states, 2) as Wilson coefficients, or 3) as remainder functions. These multiple interpretations provide different insights into the rich structure of $S_H$.
description: 5 pages, 5 figures
Supergravity divergences, supersymmetry and automorphic forms
Creators: name: Bossard, Guillaume
name: Kleinschmidt, Axel
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the occurrence of divergences in maximal supergravity in various dimensions from the point of view of supersymmetry constraints on the U-duality invariant threshold functions defining the higher derivative couplings in the effective action. Our method makes use of tensorial differential equations that constrain these couplings. We study in detail the Fourier modes and wave-front sets of the associated automorphic functions and find that they are always associated to special nilpotent orbits.
description: 45 pages, 2 figures. v2: JHEP version with small corrections
Fermi surface and mass renormalization in the iron-based superconductor YFe$_2$Ge$_2$
Creators: name: Baglo, Jordan
name: Chen, Jiasheng
name: Murphy, Keiron
name: Leenen, Roos
name: McCollam, Alix
name: Sutherland, Michael L.
name: Grosche, F. Malte
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Quantum oscillation measurements in the new unconventional superconductor YFe$_2$Ge$_2$ resolve all four Fermi surface pockets expected from band structure calculations, which predict an electron pocket in the Brillouin zone corner and three hole pockets enveloping the centers of the top and bottom of the Brillouin zone. The carrier masses are uniformly renormalized by about a factor of five and broadly account for the enhanced heat capacity Sommerfeld coefficient $\simeq 100$ mJ/molK$^2$. Our data highlight the key role of the electron pocket, which despite its small volume accounts for about half the total density of states, and point towards a predominantly local mechanism underlying the mass renormalization in YFe$_2$Ge$_2$.
description: 5 pages, 5 figures
Hole-induced anomaly in the thermodynamic behavior of a one-dimensional Bose gas
Creators: name: De Rosi, Giulia
name: Rota, Riccardo
name: Astrakharchik, Grigori E.
name: Boronat, Jordi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We reveal an intriguing anomaly in the temperature dependence of the specific heat of a one-dimensional Bose gas. The observed peak holds for arbitrary interaction and remembers a superfluid-to-normal phase transition in higher dimensions, but phase transitions are not allowed in one dimension. The presence of the anomaly signals a region of unpopulated states which behaves as an energy gap and is located below the hole branch in the excitation spectrum. The anomaly temperature is found to be of the same order of the energy of the maximum of the hole branch. We rely on the Bethe Ansatz to obtain the specific heat exactly and provide interpretations of the analytically tractable limits. The dynamic structure factor is computed with the Path Integral Monte Carlo method for the first time. We notice that at temperatures similar to the anomaly threshold, the energy of the thermal fluctuations become comparable with the maximal hole energy, leading to a qualitative change in the structure of excitations. This excitation pattern experiences the breakdown of the quasi-particle description for any value of the interaction strength at the anomaly, similarly to any superfluid phase transition at the critical temperature. We provide indications for future observations and how the hole anomaly can be employed for in-situ thermometry, identifying different collisional regimes and understanding other anomalies in atomic, solid-state, electronic, spin-chain and ladder systems.
description: Main Text: 16 pages, 6 figures. Appendices: 11 pages, 4 figures. Open-access datasets can be found at 10.5821/data-2117-353128-1
Competing Models
Creators: name: Olea, Jose Luis Montiel
name: Ortoleva, Pietro
name: Pai, Mallesh M
name: Prat, Andrea
Publisher: name: arXiv
Year: 2019
Subjects: subject: Theoretical Economics (econ.TH)
subject: Machine Learning (cs.LG)
subject: Econometrics (econ.EM)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences
subject: 62J99, 91B26,

description: Different agents need to make a prediction. They observe identical data, but have different models: they predict using different explanatory variables. We study which agent believes they have the best predictive ability -- as measured by the smallest subjective posterior mean squared prediction error -- and show how it depends on the sample size. With small samples, we present results suggesting it is an agent using a low-dimensional model. With large samples, it is generally an agent with a high-dimensional model, possibly including irrelevant variables, but never excluding relevant ones. We apply our results to characterize the winning model in an auction of productive assets, to argue that entrepreneurs and investors with simple models will be over-represented in new sectors, and to understand the proliferation of "factors" that explain the cross-sectional variation of expected stock returns in the asset-pricing literature.
Glucocorticoid receptor DNA methylation, childhood maltreatment and major depression
Creators: name: Aiello, Allison E.
name: Bustamante, Angela C.
name: Ratanatharathorn, Andrew
name: Uddin, Monica
name: Noronha, Carol
name: Wildman, Derek E.
name: Galea, Sandro
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Altered DNA methylation (DNAm) levels of hypothalamic-pituitary-adrenal (HPA) axis genes has been associated with exposure to childhood maltreatment (CM) and depression; however, it is unknown whether CM and depression have joint and potentially interacting effects on the glucocorticoid receptor (NR3C1) DNAm. We investigated the impact of CM and lifetime major depressive disorder (MDD) on NR3C1 DNAm and gene expression (GE) in 147 adult participants from the Detroit Neighborhood Health Study.
Magic configurations in Moiré Superlattice of Bilayer Photonic crystal: Almost-Perfect Flatbands and Unconventional Localization
Creators: name: Nguyen, Dung Xuan
name: Letartre, Xavier
name: Drouard, Emmanuel
name: Viktorovitch, Pierre
name: Nguyen, H. Chau
name: Nguyen, Hai Son
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the physics of photonic band structures of the moiré patterns that emerged when overlapping two uni-dimensional (1D) photonic crystal slabs with mismatched periods. The band structure of our system is a result of the interplay between intra-layer and inter-layer coupling mechanisms, which can be fine-tuned via the distance separating the two layers. We derive an effective Hamiltonian that captures the essential physics of the system and reproduces all numerical simulations of electromagnetic solutions with high accuracy. Most interestingly, \textit{magic distances} corresponding to the emergence of photonic flatbands within the whole Brillouin zone of the moiré superlattice are observed. We demonstrate that these flatband modes are tightly localized within a moiré period. Moreover, we suggest a single-band tight-binding model that describes the moiré minibands, of which the tunnelling rate can be continuously tuned via the inter-layer strength. Our results show that the band structure of bilayer photonic moiré can be engineered in the same fashion as the electronic/excitonic counterparts. It would pave the way to study many-body physics at photonic moiré flatbands and novel optoelectronic devices.
description: 6 pages + Supplement. Comments are welcome!
Architecture specification of a Room Temperature Control (RTC) system
Creators: name: Fagner
name: , Marcel
name: , Thais
name: , Everton
name: , Jair
name: , Flavio
Publisher: name: Zenodo
Year: 2023

description: This repository contains the diagrams corresponding to the architecture description of a Room Temperature Control (RTC) system in the SysADL architectural language and its translation to a formal specification in CSP.
The elastic trefoil is the twice covered circle
Creators: name: Gerlach, Henryk
name: Reiter, Philipp
name: von der Mosel, Heiko
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 49Q10, 53A04, 57M25, 74B05

description: We investigate the elastic behavior of knotted loops of springy wire. To this end we minimize the classic bending energy $E_{\text{bend}}=\intκ^2$ together with a small multiple of ropelength $\mathcal R=\text{length}/\text{thickness}$ in order to penalize selfintersection. Our main objective is to characterize elastic knots, i.e., all limit configurations of energy minimizers of the total energy $E_\vartheta:=E_{\text{bend}}+\vartheta\mathcal R$ as $\vartheta$ tends to zero. The elastic unknot turns out to be the round circle with bending energy $(2π)^2$. For all (non-trivial) knot classes for which the natural lower bound $(4π)^2$ for the bending energy is sharp, the respective elastic knot is the twice covered circle. The knot classes for which $(4π)^2$ is sharp are precisely the $(2,b)$-torus knots for odd $b$ with $|b|\ge 3$ (containing the trefoil). In particular, the elastic trefoil is the twice covered circle.
description: 47 pages, 28 figures; minor corrections
Barbarea bracteosa Guss., Fl. Sicul. Prodr.
Creators: name: Peruzzi, Lorenzo
name: Galasso, Gabriele
name: Domina, Gianniantonio
name: Bartolucci, Fabrizio
name: Santangelo, Annalisa
name: Alessandrini, Alessandro
name: Astuti, Giovanni
name: D'Antraccoli, Marco
name: Roma-Marzio, Francesco
name: Ardenghi, Nicola M. G.
name: Barberis, Giuseppina
name: Conti, Fabio
name: Bernardo, Liliana
name: Peccenini, Simonetta
name: Stinca, Adriano
name: Wagensommer, Robert P.
name: Bonari, Gianmaria
name: Iamonico, Duilio
name: Iberite, Mauro
name: Viciani, Daniele
name: Guacchio, Emanuele Del
name: Galdo, Gianpietro Giusso Del
name: Lastrucci, Lorenzo
name: Villani, Mariacristina
name: Brunu, Antonello
name: Magrini, Sara
name: Pistarino, Annalaura
name: Brullo, Salvatore
name: Salmeri, Cristina
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Barbarea
Barbarea bracteosa

description: Barbarea bracteosa Guss., Fl. Sicul. Prodr. 2: 257. 1829–1831. [16 October 1829 –1831]
 Ind. Loc.:—“In humentibus montosis; Monregale a Sagana, Madonie, Capizzi, Bafia, Floresta, Monte di Mistretta, Boschi di Caronia”. SIC
 Type:—Not designated.
 Compiled by:— A. Santangelo
description: Published as part of Peruzzi, Lorenzo, Galasso, Gabriele, Domina, Gianniantonio, Bartolucci, Fabrizio, Santangelo, Annalisa, Alessandrini, Alessandro, Astuti, Giovanni, D'Antraccoli, Marco, Roma-Marzio, Francesco, Ardenghi, Nicola M. G., Barberis, Giuseppina, Conti, Fabio, Bernardo, Liliana, Peccenini, Simonetta, Stinca, Adriano, Wagensommer, Robert P., Bonari, Gianmaria, Iamonico, Duilio, Iberite, Mauro, Viciani, Daniele, Guacchio, Emanuele Del, Galdo, Gianpietro Giusso Del, Lastrucci, Lorenzo, Villani, Mariacristina, Brunu, Antonello, Magrini, Sara, Pistarino, Annalaura, Brullo, Salvatore & Salmeri, Cristina, 2019, An inventory of the names of native, non-endemic vascular plants described from Italy, their loci classici and types, pp. 1-215 in Phytotaxa 410 (1) on page 27, DOI: 10.11646/phytotaxa.410.1.1, http://zenodo.org/record/13716045
Time periodicity from randomness in quantum systems
Creators: name: Guarnieri, Giacomo
name: Mitchison, Mark T.
name: Purkayastha, Archak
name: Jaksch, Dieter
name: Buča, Berislav
name: Goold, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Many complex systems can spontaneously oscillate under non-periodic forcing. Such self-oscillators are commonplace in biological and technological assemblies where temporal periodicity is needed, such as the beating of a human heart or the vibration of a cello string. While self-oscillation is well understood in classical non-linear systems and their quantized counterparts, the spontaneous emergence of periodicity in quantum systems without a semi-classical limit is more elusive. Here, we show that this behavior can emerge within the repeated-interaction description of open quantum systems. Specifically, we consider a many-body quantum system that undergoes dissipation due to sequential coupling with auxiliary systems at random times. We develop dynamical symmetry conditions that guarantee an oscillatory long-time state in this setting. Our rigorous results are illustrated with specific spin models, which could be implemented in trapped-ion quantum simulators.
description: 5+5 pages; 3 figures
Clustering Graphs -- Applying a Label Propagation Algorithm to Detect Communities in Graph Databases
Creators: name: Ferhati, Andi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: In the last few decades, Database Management Systems (DBMSs) became powerful tools for storing large amount of data and executing complex queries over them. In the recent years, the growing amount of unstructured or semi-structured data has seen a shift from representing data in the relational model towards alternative data models. Graph Databases and Graph Database Management Systems (GDBMSs) have seen an increase in use due to their ability to manage highly-interconnected, continuously evolving data. This thesis is a documentation of the work done in implementing a system to identify clusters in graph modeled data using a Label Propagation Community Detection Algorithm. The graph was built using datasets of academic publications in the field of Computer Science obtained from dblp.org . The system developed is a FullStack WebApp consisting of a web-based user interface, an API and the data (nodes, edges, graph) stored in a Graph Database Management System (GDBMS). Described in this document are: - the process of manipulation pre-import and import of the data in a Graph Database Management System (GDBMS) such as ArangoDB, creation of nodes, relations (edges) between the nodes and a graph composed of these nodes and edges; - the GraphQL API implemented in NodeJS to request data from the Graph Database Management System (GDBMS); - the frontend interface made with TypeScript and React consisting of the search functionalities and ability to visualize results in Cytoscape Network Graphs; - the Label Propagation Community Detection Algorithm execution on the graph, the found clusters which are stored and visualized to the user whenever requested. This thesis hopes to contribute with a practical hands-on approach on the graph representation, integration and analysis of interconnected data.
description: Master's Degree in Computer Science & Engineering. GitHub repo: https://github.com/A-Domain-that-Rocks/
Lyapunov exponent for products of random Ising transfer matrices: the balanced disorder case
Creators: name: Giacomin, Giambattista
name: Greenblatt, Rafael L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82B44, 60K37, 82B27, 60K35

description: We analyze the top Lyapunov exponent of the product of sequences of two by two matrices that appears in the analysis of several statistical mechanics models with disorder: for example these matrices are the transfer matrices for the nearest neighbor Ising chain with random external field, and the free energy density of this Ising chain is the Lyapunov exponent we consider. We obtain the sharp behavior of this exponent in the large interaction limit when the external field is centered: this balanced case turns out to be critical in many respects. From a mathematical standpoint we precisely identify the behavior of the top Lyapunov exponent of a product of two dimensional random matrices close to a diagonal random matrix for which top and bottom Lyapunov exponents coincide. In particular, the Lyapunov exponent is only $\log$-Hölder continuous.
description: 29 pages, 2 figures. Introduction is restructured, a few misprints corrected. Accepted for publication on Alea
How should we screen for depression following a natural disaster? An ROC approach to post-disaster screening in adolescents and adults
Creators: name: Bunnell, Brian E.
name: Acierno, Ron
name: Ruggiero, Kenneth J.
name: Adams, Zachary W.
name: Menon, Suvarna V.
name: Danielson, Carla Kmett
name: Cohen, Joseph R.
name: Youngstrom, Eric A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: The present study’s aim was to provide the foundation for an efficient, empirically based protocol for depression screening following a natural disaster. Utilizing a Receiver Operating Characteristic (ROC) analytic approach, the study tested a) what specific disaster-related stressors (i.e., property damage, loss of basic services) and individual-related constructs (i.e., PTSD symptoms, trauma history, social support) conveyed the greatest risk for post-natural disaster depression, b) specific cutoff scores across these measures, and c) whether the significance or cutoff scores for each construct varied between adolescents and adults.
Complex Langevin and other approaches to the sign problem in quantum many-body physics
Creators: name: Berger, Casey E.
name: Rammelmüller, Lukas
name: Loheac, Andrew C.
name: Ehmann, Florian
name: Braun, Jens
name: Drut, Joaquín E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We review the theory and applications of complex stochastic quantization to the quantum many-body problem. Along the way, we present a brief overview of a number of ideas that either ameliorate or in some cases altogether solve the sign problem, including the classic reweighting method, alternative Hubbard-Stratonovich transformations, dual variables (for bosons and fermions), Majorana fermions, density-of-states methods, imaginary asymmetry approaches, and Lefschetz thimbles. We discuss some aspects of the mathematical underpinnings of conventional stochastic quantization, provide a few pedagogical examples, and summarize open challenges and practical solutions for the complex case. Finally, we review the recent applications of complex Langevin to quantum field theory in relativistic and nonrelativistic quantum matter, with an emphasis on the nonrelativistic case.
description: 68 pages, 19 figures, review article, version submitted to Physics Reports
Ongoing life stressors and suicidal ideation among HIV-infected adults with depression
Creators: name: Edmonds, Andrew
name: Quinlivan, E. Byrd
name: Pence, Brian W.
name: Modi, Riddhi
name: Shirey, Kristen
name: Thielman, Nathan M.
name: Heine, Amy D.
name: Gaynes, Bradley N.
name: O'Donnell, Julie K.
name: Cole, Stephen R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Suicidal ideation is the most proximal risk factor for suicide and can indicate extreme psychological distress; identification of its predictors is important for possible intervention. Depression and stressful or traumatic life events (STLEs), which are more common among HIV-infected individuals than the general population, may serve as triggers for suicidal thoughts.
Correlations in non-equilibrium diffusive systems
Creators: name: Garrido, Pedro L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the behavior of stationary non-equilibrium two-body correlation functions for Diffusive Systems with equilibrium reference states (DSe). We describe a DSe at the mesoscopic level by $M$ locally conserved continuum fields that evolve through coupled Langevin equations with white noises. The dynamic is designed such that the system may reach equilibrium states for a set of boundary conditions. In this form, we make the system driven to a non-equilibrium stationary state by changing the equilibrium boundary conditions. We decompose the correlations in a known local equilibrium part and another one that contains the non-equilibrium behavior and that we call {\it correlation's excess} $\bar C(x,z)$. We formally derive the differential equations for $\bar C$. To solve them order by order, we define a perturbative expansion around the equilibrium state. We show that the $\bar C$'s first-order expansion, $\bar C^{(1)}$, is always zero for the unique field case, $M=1$. Moreover $\bar C^{(1)}$ is always long-range or zero when $M>1$. Surprisingly we show that their associated fluctuations, the space integrals of $\bar C^{(1)}$, are always zero. Therefore, fluctuations are dominated by local equilibrium up to second-order in the perturbative expansion around the equilibrium. We derive the behaviors of $\bar C^{(1)}$ in real space for dimensions $d=1$ and $2$ explicitly. Finally, we derive the two first perturbative orders of the correlation's excess for a generic $M=2$ case and a hydrodynamic model.
description: 58 pages, 24 figures
Predicting persistence to antidepressant treatment in administrative claims data: Considering the influence of refill delays and prior persistence on other medications
Creators: name: White, Alice
name: Pate, Virginia
name: Stürmer, Til
name: Bushnell, Greta A.
name: Miller, Matthew
name: Swanson, Sonja A.
name: Azrael, Deborah
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Many patients with major depressive disorder (MDD) who begin antidepressant treatment discontinue use before for six months, the recommended minimum treatment length. This study sought to identify predictors of six-month antidepressant persistence including predictors utilizing patients’ electronic prescription records.
Six General Ecosystem Properties are more Intense in Biogeochemical Cycling Networks than Food Webs
Creators: name: Borrett, Stuart R.
name: Carter, Montgomery
name: Hines, David E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Network analysis has revealed whole-network properties hypothesized to be general characteristics of ecosystems including pathway proliferation, and network non-locality, homogenization, amplification, mutualism, and synergism. Collectively these properties characterize the impact of indirect interactions among ecosystem elements. While ecosystem networks generally trace a thermodynamically conserved unit through the system, there appear to be several model classes. For example, trophic (TRO) networks are built upon a food web, usually follow energy or carbon, and are the most abundant in the literature. Biogeochemical cycling (BGC) networks trace nutrients like nitrogen or phosphorus and tend to have more recycling than TRO. We tested (1) the hypothesized generality of the properties in BGC networks and (2) that they tend to be more strongly expressed in BGC networks than in the TRO networks due to increased recycling. We compared the properties in 22 BGC and 57 TRO ecosystem networks from the literature using enaR. The results generally support the hypotheses. First, five of the properties occurred in all 22 BGC models, while network mutualism occurred in 86% of the models. Further, these results were generally robust to a $\pm$50% uncertainty in the model parameters. Second, the mean network statistics for the six properties were statistically significantly greater in the BGC models than the TRO models. These results (1) confirm the general presence of these properties in ecosystem networks, (2) highlight the significance of model types in determining property intensities, (3) reinforce the importance of recycling, and (4) provide a set of indicator benchmarks for future systems comparisons. Further, this work highlights how indirect effects distributed by network connectivity can transform whole-ecosystem functioning, and adds to the growing domain of network ecology.
description: 28 pages, 6 figures, 3 tables, 2 Supplementary Tables
Evidences for interaction-induced Haldane fractional exclusion statistics in one and higher dimensions
Creators: name: Zhang, Xibo
name: Chen, Yang-Yang
name: Liu, Longxiang
name: Deng, Youjin
name: Guan, Xiwen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Haldane fractional exclusion statistics (FES) has a long history of intense studies, but its realization in physical systems is rare. Here we study repulsively interacting Bose gases at and near a quantum critical point, and find evidences that such strongly correlated gases obey simple non-mutual FES over a wide range of interaction strengths in both one and two dimensions. Based on exact solutions in one dimension, quantum Monte Carlo simulations and experiments in both dimensions, we show that the thermodynamic properties of these interacting gases, including entropy per particle, density and pressure, are essentially equivalent to those of non-interacting particles with FES. Accordingly, we establish a simple interaction-to-FES mapping that reveals the statistical nature of particle-hole symmetry breaking induced by interaction in such quantum many-body systems. Whereas strongly interacting Bose gases reach full fermionization in one dimension, they exhibit incomplete fermionization in two dimensions. Our results open a route to understanding correlated interacting systems via non-interacting particles with FES in arbitrary dimensions.
description: There are 4 figures in the main text as well as a supplemental material
Discretization of 4d Poincaré BF theory: from groups to 2-groups
Creators: name: Girelli, Florian
name: Tsimiklis, Panagiotis
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the discretization of a Poincaré/Euclidean BF theory. Upon the addition of a boundary term, this theory is equivalent to the BFCG theory defined in terms of the Poincaré/Euclidean 2-group. At an intermediate step in the discretization, we note that there are multiple options for how to proceed. One option brings us back to recovering the discrete variables and phase space of BF theory. Another option allows us to rediscover the phase space related to the G-networks given in [2]. Indeed, our main result is that we are now able to relate the continuum fields with the discrete variables in [2]. This relation is important to determine how to implement the simplicity constraints to recover gravity using the BFCG action. In fact, we show that such relation is not as simple as in the BF discretization: the discretized variables on the triangles actually depend on several of the continuum fields instead of solely the continuum B-field. We also compare and contrast the discretized BF and BFCG models as pairs of dual 2-groups. This work highlights (again) how the choice of boundary term influences the resulting symmetry structure of the \textit{discretized theory} -- and hence ultimately the choice of quantum states.
description: 32 pages, 6 figures
Valley current filtering and reversal by parallel side contacted armchair nanotubes
Creators: name: Tamura, Ryo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The intertube conductance $G$ of the parallel side contacted armchair nanotubes is calculated by Landauer's formula as a function of the Fermi level $E$. When the intertube difference in the dope strength is large enough, a resonant peak dominant over the others appears in the $E$-$G$ curve. The overlap length and the interlayer configuration do not influence the resonant energy. The intervalley transmission at the resonant peak works as a reverser and a filter of the valley current.
description: version 4. In part just above Table V in version 3, there is a typo, where $|q_{\rm r}|$ is replaced by $E'/E$ by mistake. (correct) The small nonzero $I_{-\sigma,\sigma}$ being inversely proportional to $\widetilde{E}^2$ originates from the slight difference of $|q_{\rm r}|$ from 1 as is explained by Appendix D
Interaction Correction to the Magneto-Electric Polarizability of $Z_{2}$ Topological Insulators
Creators: name: Everschor-Sitte, Karin
name: Sitte, Matthias
name: MacDonald, Allan H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: When time-reversal symmetry is weakly broken and interactions are neglected, the surface of a $Z_{2}$ topological insulator supports a half-quantized Hall conductivity $σ_{S} = e^{2}/(2h)$. A surface Hall conductivity in an insulator is equivalent to a bulk magneto-electric polarizability, i.e. to a magnetic field dependent charge polarization. By performing an explicit calculation for the case in which the surface is approximated by a two-dimensional massive Dirac model and time-reversal symmetry is broken by weak ferromagnetism in the bulk, we demonstrate that there is a non-universal interaction correction to $σ_{S}$. For thin films interaction corrections to the top and bottom surface Hall conductivities cancel, however, implying that there is no correction to the quantized anomalous Hall effect in magnetically doped topological insulators.
description: 6 pages, 2 figures plus supplemental material (4 pages, 1 figure)
Automating the Generation of Cyber Range Virtual Scenarios with VSDL
Creators: name: Costa, Gabriele
name: Russo, Enrico
name: Armando, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: A cyber range is an environment used for training security experts and testing attack and defence tools and procedures. Usually, a cyber range simulates one or more critical infrastructures that attacking (red) and defending (blue) teams must compromise and protect, respectively. The infrastructure can be physically assembled, but much more convenient is to rely on the Infrastructure as a Service (IaaS) paradigm. Although some modern technologies support the IaaS, the design and deployment of scenarios of interest is mostly a manual operation. As a consequence, it is a common practice to have a cyber range hosting few (sometimes only one), consolidated scenarios. However, reusing the same scenario may significantly reduce the effectiveness of the training and testing sessions. In this paper, we propose a framework for automating the definition and deployment of arbitrarily complex cyber range scenarios. The framework relies on the virtual scenario description language (VSDL), i.e., a domain-specific language for defining high-level features of the desired infrastructure while hiding low-level details. The semantics of VSDL is given in terms of constraints that must be satisfied by the virtual infrastructure. These constraints are then submitted to an SMT solver for checking the satisfiability of the specification. If satisfiable, the specification gives rise to a model that is automatically converted to a set of deployment scripts to be submitted to the IaaS provider.
Predictors of depression recovery in HIV-infected individuals managed through measurement-based care in infectious disease clinics
Creators: name: Sowa, Nathaniel A.
name: Pence, Brian W.
name: Gaynes, Bradley N.
name: Bengtson, Angela
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Treatment of comorbid chronic disease, such as depression, in people living with HIV/AIDS (PLWHA) increasingly falls to HIV treatment providers. Guidance in who will best respond to depression treatment and which patient-centered symptoms are best to target is limited.
High Permittivity Dielectric Field-Plated Vertical (001) $β$-Ga$_2$O$_3$ Schottky Barrier Diode with Surface Breakdown Electric Field of 5.45 MV/cm and BFOM of $>$ 1 GW/cm$^{2}$
Creators: name: Roy, Saurav
name: Bhattacharyya, Arkka
name: Ranga, Praneeth
name: Splawn, Heather
name: Leach, Jacob
name: Krishnamoorthy, Sriram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: This paper presents vertical (001) oriented $β$-Ga$_2$O$_3$ field plated (FP) Schottky barrier diode (SBD) with a novel extreme permittivity dielectric field oxide. A thin drift layer of 1.7 $μm$ was used to enable a punch-through (PT) field profile and very low differential specific on-resistance (R$_{on-sp}$) of 0.32 m$Ω$-cm$^{2}$. The extreme permittivity field plate oxide facilitated the lateral spread of the electric field profile beyond the field plate edge and enabled a breakdown voltage ($V_{br}$) of 687 V. The edge termination efficiency increases from 13.5 $\%$ for non-field plated structure to 63 $\%$ for high permittivity field plate structure. The surface breakdown electric field was extracted to be 5.45 MV/cm at the center of the anode region using TCAD simulations. The high permittivity field plated SBD demonstrated a record high Baliga figure of merit (BFOM) of 1.47 GW/cm$^{2}$ showing the potential of Ga$_2$O$_3$ power devices for multi-kilovolt class applications.
Cohomologies, extensions and deformations of differential algebras with any weights
Creators: name: Guo, Li
name: Li, Yunnan
name: Sheng, Yunhe
name: Zhou, Guodong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 16E40, 16S80, 12H05, 12H10, 16W25, 16S70

description: As an algebraic study of differential equations, differential algebras have been studied for a century and and become an important area of mathematics. In recent years the area has been expended to the noncommutative associative and Lie algebra contexts and to the case when the operator identity has a weight in order to include difference operators and difference algebras. This paper provides a cohomology theory for differential algebras of any weights. This gives a uniform approach to both the zero weight case which is similar to the earlier study of differential Lie algebras, and the non-zero weight case which poses new challenges. As applications, abelian extensions of a differential algebra are classified by the second cohomology group. Furthermore, formal deformations of differential algebras are obtained and the rigidity of a differential algebra is characterized by the vanishing of the second cohomology group.
description: 21 pages
Bupleurum veronense Turra, Fl. Ital. Prodr.
Creators: name: Peruzzi, Lorenzo
name: Galasso, Gabriele
name: Domina, Gianniantonio
name: Bartolucci, Fabrizio
name: Santangelo, Annalisa
name: Alessandrini, Alessandro
name: Astuti, Giovanni
name: D'Antraccoli, Marco
name: Roma-Marzio, Francesco
name: Ardenghi, Nicola M. G.
name: Barberis, Giuseppina
name: Conti, Fabio
name: Bernardo, Liliana
name: Peccenini, Simonetta
name: Stinca, Adriano
name: Wagensommer, Robert P.
name: Bonari, Gianmaria
name: Iamonico, Duilio
name: Iberite, Mauro
name: Viciani, Daniele
name: Guacchio, Emanuele Del
name: Galdo, Gianpietro Giusso Del
name: Lastrucci, Lorenzo
name: Villani, Mariacristina
name: Brunu, Antonello
name: Magrini, Sara
name: Pistarino, Annalaura
name: Brullo, Salvatore
name: Salmeri, Cristina
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Bupleurum
Bupleurum veronense

description: Bupleurum veronense Turra, Fl. Ital. Prodr.: 64(–65). 1780.
 Ind. Loc.:—“Monte Baldo”. TAA, VEN
 Type:—Not designated.
 Compiled by:— M. Villani
description: Published as part of Peruzzi, Lorenzo, Galasso, Gabriele, Domina, Gianniantonio, Bartolucci, Fabrizio, Santangelo, Annalisa, Alessandrini, Alessandro, Astuti, Giovanni, D'Antraccoli, Marco, Roma-Marzio, Francesco, Ardenghi, Nicola M. G., Barberis, Giuseppina, Conti, Fabio, Bernardo, Liliana, Peccenini, Simonetta, Stinca, Adriano, Wagensommer, Robert P., Bonari, Gianmaria, Iamonico, Duilio, Iberite, Mauro, Viciani, Daniele, Guacchio, Emanuele Del, Galdo, Gianpietro Giusso Del, Lastrucci, Lorenzo, Villani, Mariacristina, Brunu, Antonello, Magrini, Sara, Pistarino, Annalaura, Brullo, Salvatore & Salmeri, Cristina, 2019, An inventory of the names of native, non-endemic vascular plants described from Italy, their loci classici and types, pp. 1-215 in Phytotaxa 410 (1) on page 32, DOI: 10.11646/phytotaxa.410.1.1, http://zenodo.org/record/13716045
On Chlodowsky variant of (p,q) Kantorovich-Stancu-Schurer operators
Creators: name: Mishra, Vishnu Narayan
name: Pandey, Shikha
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: In the present paper, we introduce the Chlodowsky variant of (p,q) Kantorovich-Stancu-Schurer operators on the unbounded domain which is a generalization of (p,q) Bernstein-Stancu-Kantorovich operators. We have also derived its Korovkin type approximation properties and its rate of convergence.
description: arXiv admin note: substantial text overlap with arXiv:1508.06888
Sustained anterior cingulate cortex activation during reward processing predicts response to psychotherapy in major depressive disorder
Creators: name: Moore, Tyler
name: Walsh, Erin
name: Dichter, Gabriel S.
name: Minkel, Jared
name: Petty, Chris
name: Crowther, Andrew
name: Bizzell, Josh
name: Carl, Hannah
name: Eisenlohr-Moul, Tory
name: Gibbs, Devin
name: Smoski, Moria J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: The purpose of the present investigation was to evaluate whether pre-treatment neural activation in response to rewards is a predictor of clinical response to Behavioral Activation Therapy for Depression (BATD), an empirically validated psychotherapy that decreases depressive symptoms by increasing engagement with rewarding stimuli and reducing avoidance behaviors.
Tinkertoys for the Twisted D-Series
Creators: name: Chacaltana, Oscar
name: Distler, Jacques
name: Trimm, Anderson
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study 4D N=2 superconformal field theories that arise from the compactification of 6D N=(2,0) theories of type D_N on a Riemann surface, in the presence of punctures twisted by a Z_2 outer automorphism. Unlike the untwisted case, the family of SCFTs is in general parametrized, not by M_{g,n}, but by a branched cover thereof. The classification of these SCFTs is carried out explicitly in the case of the D_4 theory, in terms of three-punctured spheres and cylinders, and we provide tables of properties of twisted punctures for the D_5 and D_6 theories. We find realizations of Spin(8) and Spin(7) gauge theories with matter in all combinations of vector and spinor representations with vanishing beta-function, as well as Sp(3) gauge theories with matter in the 3-index traceless antisymmetric representation.
description: 75 pages, 270 figures