cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the Monitorability of Session Types, in Theory and Practice (Extended Version)
Creators: name: Burlò, Christian Batrolo
name: Francalanza, Adrian
name: Scalas, Alceste
Publisher: name: arXiv
Year: 2021
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: In concurrent and distributed systems, software components are expected to communicate according to predetermined protocols and APIs - and if a component does not observe them, the system's reliability is compromised. Furthermore, isolating and fixing protocol/API errors can be very difficult. Many methods have been proposed to check the correctness of communicating systems, ranging from compile-time to run-time verification; among such methods, session types have been applied for both static type-checking, and run-time monitoring. This work takes a fresh look at the run-time verification of communicating systems using session types, in theory and in practice. On the theoretical side, we develop a novel formal model of session-monitored processes; with it, we formulate and prove new results on the monitorability of session types, connecting their run-time and static verification - in terms of soundness (i.e., whether monitors only flag ill-typed processes) and completeness (i.e., whether all ill-typed processes can be flagged by a monitor). On the practical side, we show that our monitoring theory is indeed realisable: building upon our formal model, we develop a Scala toolkit for the automatic generation of session monitors. Our executable monitors can be used to instrument black-box processes written in any programming language; we assess the viability of our approach with a series of benchmarks.
Event-Based Dynamic Banking Network Exploration for Economic Anomaly Detection
Creators: name: Alamsyah, Andry
name: Ramadhani, Dian Puteri
name: Kristanti, Farida Titik
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: Computers and Society (cs.CY)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: The instability of financial system issues might trigger a bank failure, evoke spillovers, and generate contagion effects which negatively impacted the financial system, ultimately on the economy. This phenomenon is the result of the highly interconnected banking transaction. The banking transactions network is considered as a financial architecture backbone. The strong interconnectedness between banks escalates contagion disruption spreading over the banking network and trigger the entire system collapse. This far, the financial instability is generally detected using macro approach mainly the uncontrolled transaction deficits amount and unpaid foreign debt. This research proposes financial instability detection in another point of view, through the macro view where the banking network structure are explored globally and micro view where focuses on the detailed network patterns called motif. Network triadic motif patterns used as a denomination to detect financial instability. The most related network triadic motif changes related to the instability period are determined as a detector. We explore the banking network behavior under financial instability phenomenon along with the major religious event in Indonesia, Eid al-Fitr. We discover one motif pattern as the financial instability underlying detector. This research helps to support the financial system stability supervision.
description: 12 pages, 16 figures, 5 tables
Bounces/Dyons in the Plane Wave Matrix Model and SU(N) Yang-Mills Theory
Creators: name: Popov, Alexander D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider SU(N) Yang-Mills theory on the space R^1\times S^3 with Minkowski signature (-+++). The condition of SO(4)-invariance imposed on gauge fields yields a bosonic matrix model which is a consistent truncation of the plane wave matrix model. For matrices parametrized by a scalar ϕ, the Yang-Mills equations are reduced to the equation of a particle moving in the double-well potential. The classical solution is a bounce, i.e. a particle which begins at the saddle point ϕ=0 of the potential, bounces off the potential wall and returns to ϕ=0. The gauge field tensor components parametrized by ϕare smooth and for finite time both electric and magnetic fields are nonvanishing. The energy density of this non-Abelian dyon configuration does not depend on coordinates of R^1\times S^3 and the total energy is proportional to the inverse radius of S^3. We also describe similar bounce dyon solutions in SU(N) Yang-Mills theory on the space R^1\times S^2 with signature (-++). Their energy is proportional to the square of the inverse radius of S^2. From the viewpoint of Yang-Mills theory on R^{1,1}\times S^2 these solutions describe non-Abelian (dyonic) flux tubes extended along the x^3-axis.
description: 11 pages; v2: one formula added, some coefficients corrected
Navigating Conceptual Space; A new take on Artificial General Intelligence
Creators: name: Leikanger, Per R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Edward C. Tolman found reinforcement learning unsatisfactory for explaining intelligence and proposed a clear distinction between learning and behavior. Tolman's ideas on latent learning and cognitive maps eventually led to what is now known as conceptual space, a geometric representation where concepts and ideas can form points or shapes.Active navigation between ideas - reasoning - can be expressed directly as purposive navigation in conceptual space. Assimilating the theory of conceptual space from modern neuroscience, we propose autonomous navigation as a valid approach for emulated cognition. However, achieving autonomous navigation in high-dimensional Euclidean spaces is not trivial in technology. In this work, we explore whether neoRL navigation is up for the task; adopting Kaelbling's concerns for efficient robot navigation, we test whether the neoRL approach is general across navigational modalities, compositional across considerations of experience, and effective when learning in multiple Euclidean dimensions. We find neoRL learning to be more resemblant of biological learning than of RL in AI, and propose neoRL navigation of conceptual space as a plausible new path toward emulated cognition.
description: Featured in the conference of Artificial General Intelligence 2021. Part of the Lecture Notes in Computer Science book series (LNCS, volume 13154) and Lecture Notes in Artificial Intelligence book sub series (LNAI, volume 13154)
Stable Charged Radiating Systems Associated with Tilted Observers
Creators: name: Yousaf, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper is aimed to study the influence of electromagnetic field and tilted congruences on the dynamical features of self-gravitating system. We shall explore the stability of homogeneous energy density in the background of Maxwell-Palatini $f(R)$ gravity. In this respect, we have considered an irrotational non-static planar geometry which is assumed to have two different types of gravitating sources. The role of tilted congruences and the geodesic motion of an evolving system is studied through the divergence of the entropy vector field. The condition for the emergence of Minskoskian cavity is also explored. In order to connect tilted and non-tilted reference frames with inflationary and inverse Ricci scalar corrections in the charged medium, few well-consistent relations are presented. It is concluded that effective electric charge is trying to increase the stability of regular energy density of the planar system.
description: 26 pages, 2 figures
Black Hole Motion as Catalyst of Orbital Resonances
Creators: name: Boily, C. M.
name: Padmanabhan, T.
name: Paiement, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The motion of a black hole about the centre of gravity of its host galaxy induces a strong response from the surrounding stellar population. We treat the case of a harmonic potential analytically and show that half of the stars on circular orbits in that potential shift to an orbit of lower energy, while the other half receive a positive boost and recede to a larger radius. The black hole itself remains on an orbit of fixed amplitude and merely acts as a catalyst for the evolution of the stellar energy distribution function f(E). We show that this effect is operative out to a radius of approx 3 to 4 times the hole's influence radius, R_bh. We use numerical integration to explore more fully the response of a stellar distribution to black hole motion. We consider orbits in a logarithmic potential and compare the response of stars on circular orbits, to the situation of a `warm' and `hot' (isotropic) stellar velocity field. While features seen in density maps are now wiped out, the kinematic signature of black hole motion still imprints the stellar line-of-sight mean velocity to a magnitude ~18% the local root mean-square velocity dispersion sigma.
description: revised version, typos fixed, added references, 20 pages MN style
Revisiting B\toπK, πK^{\ast} and ρK decays: CP violations and implication for New Physics
Creators: name: Chang, Qin
name: Li, Xin-Qiang
name: Yang, Ya-Dong
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Combining the up-to-date experimental information on $B\toπK, πK^{\ast}$ and $ρK$ decays, we revisit the decay rates and CP asymmetries of these decays within the framework of QCD factorization. Using an infrared finite gluon propagator of Cornwall prescription, we find that the time-like annihilation amplitude could contribute a large strong phase, while the space-like hard spectator scattering amplitude is real. Numerically, we find that all the branching ratios and most of the direct CP violations, except $A_{CP}(B^{\pm}\to K^{\pm}π^{0})$, agree with the current experimental data with an effective gluon mass $m_g\simeq0.5 {\rm GeV}$. Taking the unmatched difference in direct CP violations between $B\toπ^{0} K^{\pm}$ and $π^{\mp}K^{\pm}$ decays as a hint of new physics, we perform a model-independent analysis of new physics contributions with a set of $\bar{s}(1+γ_{5})b\otimes\bar{q}(1+γ_{5})q$ (q=u,d) operators. Detail analyses of the relative impacts of the operators are presented in five cases. Fitting the twelve decay modes, parameter spaces are found generally with nontrivial weak phases. Our results may indicate that both strong phase from annihilation amplitude and new weak phase from new physics are needed to resolve the $πK$ puzzle. To further test the new physics hypothesis, the mixing-induced CP violations in $B\toπ^{0}K_{S}$ and $ρ^{0}K_{S}$ are discussed and good agreements with the recent experimental data are found.
description: Version published in JHEP
Adapting Monolingual Models: Data can be Scarce when Language Similarity is High
Creators: name: de Vries, Wietse
name: Bartelds, Martijn
name: Nissim, Malvina
name: Wieling, Martijn
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: For many (minority) languages, the resources needed to train large models are not available. We investigate the performance of zero-shot transfer learning with as little data as possible, and the influence of language similarity in this process. We retrain the lexical layers of four BERT-based models using data from two low-resource target language varieties, while the Transformer layers are independently fine-tuned on a POS-tagging task in the model's source language. By combining the new lexical layers and fine-tuned Transformer layers, we achieve high task performance for both target languages. With high language similarity, 10MB of data appears sufficient to achieve substantial monolingual transfer performance. Monolingual BERT-based models generally achieve higher downstream task performance after retraining the lexical layer than multilingual BERT, even when the target language is included in the multilingual model.
description: Findings of ACL 2021 Camera Ready
Rezension von BIERLING, Stephan. 2018. Nelson Mandela. Rebell, Häftling, Präsident.
Creators: name: Rüther, Kirsten
Publisher: name: Stichproben. Vienna Journal of African Studies
Year: 2019

description: Rezension von BIERLING, Stephan. 2018. Nelson Mandela. Rebell, Häftling, Präsident. München: Verlag C.H. Beck. 416 Seiten. ISBN: 978-3-406-72143-4. Eine Lektüre von Kirsten Rüther, University of Vienna
Constructing the Hamiltonian from the behaviour of a dynamical system by proper symplectic decomposition
Creators: name: Shirafkan, Nima
name: Gosselet, Pierre
name: Bamer, Franz
name: Oueslati, Abdelbacet
name: Markert, Bernd
name: de Saxcé, Géry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The modal analysis is revisited through the symplectic formalism, what leads to two intertwined eigenproblems. Studying the properties of the solutions, we prove that they form a canonical basis. The method is general and works even if the Hamiltonian is not the sum of the potential and kinetic energies. On this ground, we want to address the following problem: data being given in the form of one or more structural evolutions, we want to construct an approximation of the Hamiltonian from a covariant snapshot matrix and to perform a symplectic decomposition. We prove the convergence properties of the method when the time discretization is refined. If the data cloud is not enough rich, we extract the principal component of the Hamiltonian corresponding to the leading modes, allowing to perform a model order reduction for very high dimension models. The method is illustrated by a numerical example.
The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts
Creators: name: Holt, J.
name: Tadhunter, C. N.
name: Delgado, R. M. Gonzalez
name: Inskip, K. J.
name: Rodriguez, J.
name: Emonts, B. H. C.
name: Morganti, R.
name: Wills, K. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Abridged. We present high-quality optical spectra for 12 powerful radio sources at low and intermediate redshifts (z < 0.7) that show evidence for a substantial UV excess. These data were taken using the WHT and VLT to determine the detailed properties of the young stellar populations (YSPs) in the host galaxies as part of a larger project to investigate evolutionary scenarios for the AGN host galaxies. The results of our spectral synthesis model fits to the spectra highlight the importance of taking into account AGN-related components (emission lines, nebular continuum, scattered light) and reddening of the stellar populations in studies of this type. It is also clear that careful examination of the fits to the spectra, as well consideration of auxilary polarimetric and imaging data, are required to avoid degeneracies in the model solutions. In 3/12 sources in our sample we find broad permitted line components, and a combination of AGN-related continuum components and an old (12.5 Gyr) stellar population provides an adequate fit to the data. In the remaining 9 sources we find strong evidence for YSPs. In contrast to some recent studies that suggest relatively old post-starburst ages for the YSPs in radio galaxies (0.3-2.5 Gyr), we deduce a wide range of ages for the YSPs in our sample objects (0.02-1.5 Gyr), with ~50% of the sample showing evidence for young YSP ages (
description: 33 pages, 10 figures, accepted for publication in MNRAS, some low resolution figures
Disagreement : estimation of relative bias or discrepancy rate
Creators: name: Ma, Ping Hang
Publisher: name: University of British Columbia
Year: 2010

description: Not only basic research in sciences, but also medicine, law, and manufacturing need statistical techniques, including graphics, to assess disagreement. For some items or individuals ⍳ = 1,2,---,ո suppose that pairs (X⍳,Y⍳) denote each item's measurements by two distinct methods or by two observers, or X⍳ and Y⍳ may be initial and repeat measurement scores, with discrepancy D⍳ = X⍳ - Y⍳. Disagreement may be characterized by location and scale parameters of discrepancy distributions. The present work primarily addresses estimation of central tendency - relative bias or median discrepancy (or discrepancy rate in some instances). Most previous literature on "agreement" or "reliability" instead concerns X, Y correlation, which can be regarded as the complement of discrepancy variance. (There is ambiguity or confusion about concepts of "reliability" in the literature of various applications.) Discrepancies D₁, D₂, • • •, Dո in practice often violate assumptions of standard statistical models and methods that have been commonly applied in studies of agreement. In particular, both X⍳ and Y⍳ generally incorporate measurement errors. Further, these two measurement error distributions for the ⍳th item need not be the same; and both distributions could depend on the magnitude µ⍳, of the item being measured. Hence, for example, discrepancy D⍳ could have variance proportional to the size of the item; and in general D₁, D₂, • • •, Dո are not identically distributed. Finally, the selection of items ⍳ = 1,2, • • •, ո often is not random. To estimate median discrepancy, we consider nonparametric confidence intervals corresponding to Student t test, sign test, Wilcoxon signed rank test, or other permutation tests. Several criteria are developed to compare the performance of one procedure relative to another, including expected ratio of confidence interval lengths (related to Pitman asymptotic relative efficiency of tests) and relative variability of interval lengths. Theoretical calculations and Monte Carlo simulation results suggest different procedural preferences for random sampling from different distributions. For discrepancies distributed non-identically, but symmetrically about a common median value, mixture sampling is used as an approximate model. This approach is related to a "random walk" (rather than random sample) model of D₁, D₂, • • •, Dո proposed particularly for discrepancies between counting processes. We also emphasize graphic methods, especially plots of difference of Y - X versus average (X + Y)/2, for exploratory analysis of discrepancy data and to choose appropriate statistical models and numerical methods. Various data sets are analyzed as examples of the methodology.
Automorphisms of real rational surfaces and weighted blow-up singularities
Creators: name: Huisman, Johannes
name: Mangolte, Frédéric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 14E07

description: Let X be a singular real rational surface obtained from a smooth real rational surface by performing weighted blow-ups. Denote by Aut(X) the group of algebraic automorphisms of X into itself. Let n be a natural integer and let e=[e_1,...,e_l] be a partition of n. Denote by X^e the set of l-tuples (P_1,...,P_l) of distinct nonsingular curvilinear infinitely near points of X of orders (e_1,...,e_l). We show that the group Aut(X) acts transitively on X^e. This statement generalizes earlier work where the case of the trivial partition e=[1,...,1] was treated under the supplementary condition that X is nonsingular. As an application we classify singular real rational surfaces obtained from nonsingular surfaces by performing weighted blow-ups.
description: 16 pages, 2 figures
Rezension von LUNDT, Bea/ MARX, Christoph (eds.). 2016. Kwame Nkrumah 1909-1972. A Controversial African Visionary.
Creators: name: Wurzer, Katharina
Publisher: name: Stichproben. Vienna Journal of African Studies
Year: 2019

description: Rezension von LUNDT, Bea/ MARX, Christoph (eds.). 2016. Kwame Nkrumah 1909-1972. A Controversial African Visionary. (Historische Mitteilungen der Ranke- Gesellschaft – Beiheft 96) Stuttgart: Franz Steiner. 208 pp. ISBN: 978-3- 515-11572-8.
Un problème de type Yamabe sur les variétés compactes spinorielles compactes
Creators: name: Ammann, Bernd
name: Humbert, Emmanuel
name: Morel, Bertrand
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $(M,g,\si)$ be a compact spin manifold of dimension $n \geq 2$. Let $λ_1^+(\tilde{g})$ be the smallest positive eigenvalue of the Dirac operator in the metric $\tilde{g} \in [g]$ conformal to $g$. We then define $\lamin(M,[g],\si) = \inf_{\tilde{g} \in [g]} λ_1^+(\tilde{g}) \Vol(M,\tilde{g})^{1/n} $. We show that $0< \lamin(M,[g],\si) \leq \lamin(\mS^n)$. %=\frac{n}{2} \om_n^{1 \over n}$ . We find sufficient conditions for which we obtain strict inequality $\lamin(M,[g],\si) < \lamin(\mS^n)$. This strict inequality has applications to conformal spin geometry. ----- Soit $(M,g,\si)$ une variété spinorielle compacte de dimension $n \geq 2$. %Si $\tilde{g} \in [g]$ est une métrique conforme à $g$, On note $λ_1^+(\tilde{g})$ la plus petite valeur propre $>0$ de l'opérateur de Dirac dans la métrique $\tilde{g} \in [g]$ conforme à $g$. On définit $\lamin(M,[g],\si) = \inf_{\tilde{g} \in [g]} λ_1^+(\tilde{g}) \Vol(M,\tilde{g})^{1/n} $. On montre que $0< \lamin(M,[g],\si) \leq \lamin(\mS^n)$. %= \frac{n}{2} \om_n^{1 \over n}$ On trouve des conditions suffisantes pour lesquelles on obtient l'inégalité stricte $\lamin(M,[g],\si) < \lamin(\mS^n)$. Cette inégalité stricte a des applications en géométrie spinorielle conforme.
Scaling and correlations in three bus-transport networks of China
Creators: name: Xu, Xinping
name: Hu, Junhui
name: Liu, Feng
name: Liu, Lianshou
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We report the statistical properties of three bus-transport networks (BTN) in three different cities of China. These networks are composed of a set of bus lines and stations serviced by these. Network properties, including the degree distribution, clustering and average path length are studied in different definitions of network topology. We explore scaling laws and correlations that may govern intrinsic features of such networks. Besides, we create a weighted network representation for BTN with lines mapped to nodes and number of common stations to weights between lines. In such a representation, the distributions of degree, strength and weight are investigated. A linear behavior between strength and degree s(k) ~ k is also observed.
description: 9 pages, 6 figures and 2 tables. Slight difference from the published one
Tunneling spin current and spin diode behavior in bilayer system
Creators: name: Jin, Pei-Qing
name: Li, You-Quan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The coherent tunneling spin current in the bilayer system with spin-orbit coupling is investigated. Based on the continuity-like equations, we discuss the definition of the tunneling current and show that the overlaps between wavefunctions for different layers contribute to the tunneling current. We study the linear response of the tunneling spin current to an in-plane electric field in the presence of nonmagnetic impurities. The tunneling spin conductivity we obtained presents a feature asymmetrical with respect to the gate voltage when the strengthes of impurity potentials are different in each layer.
description: Revtex, 8 pages, 5 figures
Cylindrical Cloak with Axial Permittivity/Permeability Spatially Invariant
Creators: name: Luo, Yu
name: Zhang, Jingjing
name: Chen, Hongsheng
name: Xi, Sheng
name: Wu, Bae-Ian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In order to reduce the difficulties in the experimental realizations of the cloak but still keep good performance of invisibility, we proposed a perfect cylindrical invisibility cloak with spatially invariant axial material parameters. The advantage of this kind of TE (or TM) cloak is that only rho and phi components of mu (or epsilon) are spatially variant, which makes it possible to realize perfect invisibility with two-dimensional (2D) magnetic (or electric) metamaterials. The effects of perturbations of the parameters on the performance of this cloak are quantitatively analyzed by scattering theory. Our work provides a simple and feasible solution to the experimental realization of cloaks with ideal parameters.
SEA-Quester Dissemination, Exploitation, and Communications Plan (D7.2)
Creators: name: Hellbaum Eikeland, Paige
name: Heerema, Sabrina
name: De Luigi, Guendalina
name: Rempel, Olivia
Publisher: name: Zenodo
Year: 2024
Subjects: S-Q WP7

description: From project start to end, the SEA-Quester project hopes to meaningfully engage with stakeholders, attract young experts to our team, raise awareness of how public money is spent, and to showcase the success of European collaboration. This Dissemination, Exploitation and Communications (DEC) Plan jointly presents guidelines for SEA-Quester partners to follow in disseminating, exploiting, and communicating project activities and results, as these actions are highly interdependent.
Connection between the Riemann integrability of a multi-valued function and of its convex hull
Creators: name: Kadets, Vladimir
name: Kulykov, Artur
name: Shevchenko, Olha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B20, 28B20

description: For a Banach space $X$ we demonstrate the equivalence of the following two properties: (1) $X$ is B-convex (that is, possesses a nontrivial infratype), and (2) if ${F: [0,1] \to 2^{X} \setminus \{\varnothing\}}$ is a {multifunction}, $\mathrm{conv} F$ denotes the mapping $t \mapsto \mathrm{conv} F(t)$, then the Riemann integrability of $\mathrm{conv} F$ is equivalent to the Riemann integrability of $F$. For multifunctions with compact values the Riemann integrability of $\mathrm{conv} F$ is equivalent to the Riemann integrability of $F$ without any restrictions on the Banach space $X$.
A statistical analysis of finding the best predictor of success in first year calculus at the University of British Columbia
Creators: name: Lee, Robert Eugene
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis we focus on high school students who graduated from a B.C. high school in 1985 and then proceeded directly to the University of British Columbia (UBC) and registering in a first year calculus course in the 1985 fall term. From this data, we want to determine the best predictor of success (the high school assigned grade for Algebra 12, or the provincial grade for Algebra 12, or the average of the high school and the provincial grade for Algebra 12) in first year calculus at UBC. We first analyze the data using simple descriptive statistics and continuous methods such as regression and analysis of variance techniques. In subsequent chapters, the categorical approach is taken and we use scaling techniques as well as loglinear models. Finally, we summarize our analysis and give conclusions in the final chapter.
Quantum ESPRESSO toward the exascale
Creators: name: Giannozzi, Paolo
name: Baseggio, Oscar
name: Bonfà, Pietro
name: Brunato, Davide
name: Car, Roberto
name: Carnimeo, Ivan
name: Cavazzoni, Carlo
name: de Gironcoli, Stefano
name: Delugas, Pietro
name: Ruffino, Fabrizio Ferrari
name: Ferretti, Andrea
name: Marzari, Nicola
name: Timrov, Iurii
name: Urru, Andrea
name: Baroni, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Quantum ESPRESSO is an open-source distribution of computer codes for quantum-mechanical materials modeling, based on density-functional theory, pseudopotentials, and plane waves, and renowned for its performance on a wide range of hardware architectures, from laptops to massively parallel computers, as well as for the breadth of its applications. In this paper we present a motivation and brief review of the ongoing effort to port Quantum ESPRESSO onto heterogeneous architectures based on hardware accelerators, which will overcome the energy constraints that are currently hindering the way towards exascale computing.
Interactions between the invasive brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae), and entomopathogenic fungi
Creators: name: Pike, Thomas John
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Entomology
subject: BMSB
subject: entomopathogenic
subject: fungi
subject: stink bug

description: Brown marmorated stink bug, Halyomorpha halys, is an invasive stink bug native to Asia.  It is a highly destructive pest in both agricultural and ornamental systems.  In an effort to identify a novel biological control, several strains of entomopathogenic fungi were tested against brown marmorated stink bug nymphs and adults.  Wild-type fungi were found to cause very low mortality in bioassays, as well as resulting in little fungal growth or sporulation.  The addition of diatomaceous earth and/or horticultural oil did not increase mortality, nor did the use of transgenic fungi.  To test the proposed mechanism of brown marmorated stink bug's defense against fungal infection, trans-2-octenal and trans-2-decenal were bioassayed against several strains of entomopathogenic fungi.  These compounds were found to inhibit fungal growth and prevent spore germination at low concentrations.  Results of an experiment to determine if brown marmorated stink bug responded to fungal exposure were inconclusive.
Can electro-magnetic field, anisotropic source and varying $Λ$ be sufficient to produce wormhole spacetime ?
Creators: name: Rahaman, F.
name: Kalam, M.
name: Rahman, K. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is well known that solutions of general relativity which allow for traversable wormholes require the existence of exotic matter (matter that violates weak or null energy conditions [WEC or NEC]). In this article, we provide a class of exact solution for Einstein-Maxwell field equations describing wormholes assuming the erstwhile cosmological term $Λ$ to be space variable, viz., $Λ= Λ(r)$. The source considered here not only a matter entirely but a sum of matters i.e. anisotropic matter distribution, electromagnetic field and cosmological constant whose effective parts obey all energy conditions out side the wormhole throat. Here violation of energy conditions can be compensated by varying cosmological constant. The important feature of this article is that one can get wormhole structure, at least theoretically, comprising with physically acceptable matters.
description: Some changes have been made
Steady-state conduction in self-similar billiards
Creators: name: Barra, Felipe
name: Gilbert, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The self-similar Lorentz billiard channel is a spatially extended deterministic dynamical system which consists of an infinite one-dimensional sequence of cells whose sizes increase monotonically according to their indices. This special geometry induces a nonequilibrium stationary state with particles flowing steadily from the small to the large scales. The corresponding invariant measure has fractal properties reflected by the phase-space contraction rate of the dynamics restricted to a single cell with appropriate boundary conditions. In the near-equilibrium limit, we find numerical agreement between this quantity and the entropy production rate as specified by thermodynamics.
Empirical analysis of the ship-transport network of China
Creators: name: Xu, Xinping
name: Hu, Junhui
name: Liu, Feng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Structural properties of the ship-transport network of China (STNC) are studied in the light of recent investigations of complex networks. STNC is composed of a set of routes and ports located along the sea or river. Network properties including the degree distribution, degree correlations, clustering, shortest path length, centrality and betweenness are studied in different definition of network topology. It is found that geographical constraint plays an important role in the network topology of STNC. We also study the traffic flow of STNC based on the weighted network representation, and demonstrate the weight distribution can be described by power law or exponential function depending on the assumed definition of network topology. Other features related to STNC are also investigated.
description: 20 pages, 7 figures, 1 table
Search for $β^+$EC and ECEC processes in $^{112}$Sn and $β^-β^-$ decay of $^{124}$Sn to the excited states of $^{124}$Te
Creators: name: Barabash, A. S.
name: Hubert, Ph.
name: Nachab, A.
name: Konovalov, S. I.
name: Vanyushin, I. A.
name: Umatov, V. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Limits on $β^+$EC and ECEC processes in $^{112}$Sn and on $β^-β^-$ decay of $^{124}$Sn to the excited states of $^{124}$Te have been obtained using a 380 cm$^3$ HPGe detector and an external source consisting of natural tin. A limit with 90% C.L. on the $^{112}$Sn half-life of $0.92\times 10^{20}$ y for the ECEC(0$ν$) transition to the $0^+_3$ excited state in $^{112}$Cd (1871.0 keV) has been established. This transition is discussed in the context of a possible enhancement of the decay rate by several orders of magnitude given that the ECEC$(0ν)$ process is nearly degenerate with an excited state in the daughter nuclide. Prospects for investigating such a process in future experiments are discussed. The $β^-β^-$ decay limits for $^{124}$Sn to the excited states of $^{124}$Te were obtained on the level of $(0.8-1.2)\times 10^{21}$ y at the 90% C.L.
description: 17 pages, 5 figures
Quaternion-Based Control for Aggressive Trajectory Tracking with a Micro-Quadrotor UAV
Creators: name: Kehlenbeck, Andrew Gale
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Aerospace engineering
subject: Robotics
subject: Applied mathematics
subject: Controls
subject: Quadrotor
subject: Quaternion
subject: State Estimation
subject: Trajectory
subject: UAV

description: With potential missions for quadrotor micro-air vehicles (MAVs) calling for smaller, more agile vehicles, it is important to implement attitude controllers that allow the vehicle to reach any desired attitude without encountering computational singularities, as is the case when using an Euler angle representation. A computationally efficient quaternion-based state estimator is presented that enables the Army Research Laboratory's (ARL) 100-gram micro-quadrotor to determine its attitude during agile maneuvers using only an on-board gyroscope and accelerometer and a low-power processor. Inner and outer loop attitude and position controllers are also discussed that use the quaternion attitude representation to control the vehicle along aggressive trajectories with the assistance of an outside motion capture system. A trajectory generation algorithm is then described that leverages the quadrotor's inherent dynamics to allow it to reach extreme attitudes for applications such as perching on walls or ceilings and flying through small openings.
Characterizing the Bulk-Boundary Correspondence of one-dimensional non-Hermitian interacting systems by edge entanglement entropy
Creators: name: Chen, Weitao
name: Peng, Liangtao
name: Lu, Hantao
name: Lu, Xiancong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Dramatically different from the Hermitian systems, the conventional Bulk-Boundary Correspondence (BBC) is broken in the non-Hermitian systems. In this article, we use edge entanglement entropy to characterize the topological properties of non-Hermitian Su-Schrieffer-Heeger Hubbard model. For free Fermions, we study the scaling behavior of entanglement entropy and demonstrate that the edge entanglement entropy is a good indicator to delimit different phases of non-Hermitian systems. We further generalize the edge entanglement entropy to the non-Hermitian interacting Hubbard chain, and obtain the topological phase diagram in the plane of interaction and non-Hermitian hopping amplitudes. It is found that the Hubbard interaction diminishes and weakens the breakdown of Bulk-Boundary Correspondence, which eventually disappears at some critical value of interaction.
description: 9 pages, 6 figures
Ultrafast Dynamics of the Surface Photovoltage in Potassium Doped Black Phosphorus
Creators: name: Kremer, G.
name: Rumo, M.
name: Yue, C.
name: Pulkkinen, A.
name: Nicholson, C. W.
name: Jaouen, T.
name: von Rohr, F. O.
name: Werner, P.
name: Monney, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Black phosphorus is a quasi-two-dimensional layered semiconductor with a narrow direct band gap of 0.3 eV. A giant surface Stark effect can be produced by the potassium doping of black phosphorus, leading to a semiconductor to semimetal phase transition originating from the creation of a strong surface dipole and associated band bending. By using time- and angle-resolved photoemission spectroscopy, we report the partial photoinduced screening of this band bending by the creation of a compensating surface photovoltage. We further resolve the detailed dynamics of this effect at the pertinent timescales and the related evolution of the band structure near the Fermi level. We demonstrate that after a fast rise time, the surface photovoltage exhibits a plateau over a few tens of picoseconds before decaying on the nanosecond timescale. We support our experimental results with simulations based on drift-diffusion equations.
description: 18 pages, 12 figures
Yang-Mills Propagators and QCD
Creators: name: Frasca, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a strong coupling expansion that permits to develop analysis of quantum field theory in the infrared limit. Application to a quartic massless scalar field gives a massive spectrum and the propagator in this regime. We extend the approach to a pure Yang-Mills theory obtaining analogous results. The gluon propagator is compared satisfactorily with lattice results and similarly for the spectrum. Comparison with experimental low energy spectrum of QCD supports the view that $σ$ resonance is indeed a glueball. The gluon propagator we obtained is finally used to formulate a low energy Lagrangian for QCD that reduces to a Nambu-Jona-Lasinio model with all the parameters fixed by those of the full theory.
description: 4 pages, 1 figure. Contribution to proceedings of QCD 08 Conference, (Montpellier, France, July 7-12, 2008). Modified enunciation of the mapping theorem
Incomplete normalization of probability on multifractals
Creators: name: Wang, Qiuping A.
name: Nivanen, L.
name: Kaabouchi, A. El
name: Badiali, J. P.
name: Méhauté, A. Le
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This work is an extension of the incomplete probability theory from the simple case of monofractals previously studied to the more general case of multifractals which can occur in the phase space without equiprobable partition.
description: 10 pages, to appear in Physica A (2007)
INSPEÇÃO BACTERIOLÓGICA DA ÁGUA DE TORNEIRAS NAS ESCOLAS PÚBLICAS DA CIDADE DE ESPERANÇA/PB
Creators: name: Aldeni Barbosa da Silva
name: Edmilson Dantas da Silva Filho
name: Geraldo da Mota Dantas
name: Avaetê de Lunetta e Rodrigues Guerra
Publisher: name: Zenodo
Year: 2023

description: Objetivou-se com esse trabalho, verificar a qualidade microbiológica da água das torneiras nas escolas públicas da zona urbana do município de Esperança-PB. As amostras de água destinadas para as análises microbiológicas foram coletadas diretamente das torneiras em garrafas de vidro (500 ml) com boca larga, protegidas com papel laminado, previamente esterilizadas em autoclave a 121 oC, por 30 minutos, utilizando álcool 70% para a assepsia das torneiras anteriormente à realização da coleta, e foram encaminhadas para o Laboratório do Centro de Formação Profissional do Instituto Albano Franco em Campina Grande/PB. Os parâmetros analisados e os métodos de análises foram: coliformes totais, coliformes termotolerantes, Escherichia coli e bactérias heterotróficas. Por motivos éticos, o nome das referidas escolas foi mantido em sigilo, sendo as amostras coletadas nas mesmas, identificadas como amostras 1, 2, 3, 4 e 5. Observou-se que, todas as amostras apresentaram resultados positivos com relação aos coliformes totais e coliformes termotolerantes. Com relação a bactéria E. coli, apenas as amostras 4 e 5 apresentaram resultados insatisfatórios. Com relação as bactérias heterotróficas, todas as amostras apresentaram resultados positivos bem acima do permitido pela legislação vigente. Apenas a água da torneira da escola 5 estava em conformidade com o que estipula a norma, que determina um valor de até 500 UFC mL-1. Conclui-se que todas as amostras estão em desacordo com as recomendações estipuladas pela Portaria do Ministério da Saúde de nº 5, de 28 de setembro de 2017, necessitando, portanto, de tratamento prévio antes de serem fornecidas para consumo humano.
The real quadrangle of type E6
Creators: name: Kurth, Torsten
name: Köhl, Ralf
name: Kramer, Linus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 51E24

description: We give a geometric interpretation of the building associated to the real Lie group E_6(-14) in terms of its 54-dimensional module.
Additional file 1 of Worsening or improving hypoalbuminemia during continuous renal replacement therapy is predictive of patient outcome: a single-center retrospective study
Creators: name: Rhee, Harin
name: Jang, Gum Sook
name: Kim, Sungmi
name: Lee, Wanhee
name: Jeon, Hakeong
name: Kim, Da Woon
name: Ye, Byung-min
name: Kim, Hyo Jin
name: Kim, Min Jeong
name: Kim, Seo Rin
name: Kim, Il Young
name: Song, Sang Heon
name: Seong, Eun Young
name: Lee, Dong Won
name: Lee, Soo Bong
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Additional file 1: Table S1. Comparison of the baseline characteristics by serum albumin level at the initiation of continuous renal replacement therapy. Figure S1. Kaplan–Meier survival analysis for in-hospital mortality by serum albumin level at the initiation of continuous renal replacement therapy. Table S2. Cox regression analysis results of the effects of changes in serum albumin level on in-hospital mortality. Table S3. Comparison of patient outcomes according to changes in serum albumin level. Table S4. Effect of day 3 serum albumin on the length of stay in the ICU or hospital. Table S5. Changes in fluid balance during CRRT based on the pattern of the change in serum albumin.
Exactly solvable Ising--Heisenberg chain with triangular XXZ-Heisenberg plaquettes
Creators: name: Antonosyan, Diana
name: Bellucci, Stefano
name: Ohanyan, Vadim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A mixed Ising-Heisenberg spin system consisting of triangular XXZ-Heisenberg spin clusters assembled into a chain by alternating with Ising spins interacting to all three spins in the triangle is considered. The exact solution of the model is given in terms of the generalized decoration--iteration map and within the transfer-matrix technique. Exact expressions for thermodynamic functions are derived. Ground state phase diagrams, thermodynamic and magnetic properties of the system are examined.
description: 16 pages, 12 figures
Conical thin shell wormhole from global monopole: A theoretical construction
Creators: name: Rahaman, F.
name: Kalam, M.
name: Rahman, K. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By applying 'Darmois-Israel formalism', we establish a new class of thin shell wormhole in the context of global monopole resulting from the breaking of a global O(3) symmetry. Since global monopole is asymptotically conical (no longer asymptotically flat), we call it as conical thin shell wormhole. Different characteristics of this conical thin shell wormhole, namely, time evolution of the throat, stability, total amount of exotic matter have been discussed.
description: Some chages have been done
Impact of Fe$_{80}$B$_{20}$ insertion on the properties of dual-MgO perpendicular magnetic tunnel junctions
Creators: name: Liu, Enlong
name: Lee, Taeyoung
name: Yang, Hyunsoo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We explore the impact of Fe80B20 inserted at both Co$_{20}$Fe$_{80}$B$_{20}$/MgO interfaces of dual-MgO free layers (FLs) in bottom-pinned magnetic tunnel junctions (MTJs). MTJ stacks are annealed for 30 min at 350 $^\circ$C and 400 $^\circ$C in a vacuum after film deposition. Current-in-plane tunneling measurements are carried out to characterize magnetotransport properties of the MTJs. Conventional magnetometry measurements and ferromagnetic resonance are conducted to estimate the saturation magnetization, the effective perpendicular anisotropy field and the Gilbert damping of dual-MgO FLs as a function of the Fe$_{80}$B$_{20}$ thickness and annealing temperatures. With ultrathin Fe$_{80}$B$_{20}$ (0.2 - 0.4 nm) inserted, perpendicular magnetic anisotropy (PMA) of FLs increases with similar tunnel magneto-resistance (TMR) and low damping values. As Fe$_{80}$B$_{20}$ layer thickness further increases (0.6 - 1.2 nm), both TMR and PMA degrade, and damping increases dramatically. This study demonstrates a novel approach to tune properties of MTJ stacks with dual-MgO FLs up to 400 $^\circ$C annealing, which enables MTJ stacks for various applications.