cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalizing the Fermi velocity of strained graphene from uniform to nonuniform strain
Creators: name: Oliva-Leyva, M.
name: Naumis, Gerardo G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The relevance of the strain-induced Dirac point shift to obtain the appropriate anisotropic Fermi velocity of strained graphene is demonstrated. Then a critical revision of the available effective Dirac Hamiltonians is made by studying in detail the limiting case of a uniform strain. An effective Dirac Hamiltonian for nonuniform strain is thus reported, which takes into account all strain-induced effects: changes in the nearest-neighbor hopping parameters, the reciprocal lattice deformation and the true shift of the Dirac point. Pseudomagnetic fields are thus explained by means of position-dependent Dirac cones, whereas complex gauge fields appear as a consequence of a position-dependent Fermi velocity. Also, position-dependent Fermi velocity effects on the spinor wavefunction are considered for interesting cases of deformations such as flexural modes.
2011-Lorelei_Koss-Sustainability_in_a_differential_equations_course_case_study_of_Easter_Island
Creators: name: Koss, Lorelei
Publisher: name: QUBES Educational Resources
Year: 2023

description: Easter Island is a fascinating example of resource depletion and population collapse, and its relatively short period of human habitation combined with its isolation lends itself well to investigation by students in an ordinary differential course.
Radio pulses from ultra-high energy atmospheric showers as the superposition of Askaryan and geomagnetic mechanisms
Creators: name: Alvarez-Muñiz, Jaime
name: Carvalho, Washington R.
name: Schoorlemmer, Harm
name: Zas, Enrique
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Radio emission in atmospheric showers is currently interpreted in terms of radiation due to the deviation of the charged particles in the magnetic field of the Earth and to the charge excess (Askaryan effect). Each of these mechanisms has a distinctive polarization. The complex signal patterns can be qualitatively explained as the interference (superposition) of the fields induced by each mechanism. In this work we explicitly and quantitatively test a simple phenomenological model based on this idea. The model is constructed by isolating each of the two components at the simulation level and by making use of approximate symmetries for each of the contributions separately. The results of the model are then checked against full ZHAireS Monte Carlo simulations of the electric field calculated from first principles. We show that the simple model describes radio emission at a few percent level in a wide range of shower-observer geometries and on a shower-by-shower basis. As a consequence, this approach provides a simple method to reduce the computing time needed to accurately predict the electric field of radio pulses emitted from air showers, with many practical applications in experimental situations of interest.
description: Replaced with revised version published in Astroparticle Physics
Use of Pragmatic Organisation Dynamic Display as an AAC tool for children with communication disability: A Scoping Review Protocol
Creators: name: Young, Janie
name: Grace, Emma
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Speech Pathology and Audiology
subject: Medicine and Health Sciences
subject: Communication Sciences and Disorders
subject: Augmentative and Alternative Communication
subject: Communication Disability
subject: PODD

description: Objective: The objective of this scoping review is to understand the extent and type of evidence available in relation to the use of Pragmatic Organisation Dynamic Display Communication Books (PODD) as an Augmentative and Alternative Communication (AAC) tool for children with communication disability and to descriptively map the existing literature. Introduction: Some children with communication disability have limited use of speech to communicate and use AAC tools and other modes to support their interactions in every-day life. We know that AAC interventions support communication development and participation in everyday life, less is known about individual AAC tools. PODD is one AAC tool that was developed in 2007 by Gayle Porter that is utilised globally. The existing evidence base for PODD is not well understood and there are no previous reviews of the literature in this area. Inclusion criteria: This review focuses on children with communication disability and their communication partners who use PODD as an AAC tool. All types of evidence, including preliminary research and grey literature such as book chapters, conference presentations and theses will be included. Only papers published after 2007 will be included. Methods: A search of nine databases will scope peer reviewed, published, and grey literature. Manual searching of journals and conferences that focus on presenting AAC research. Searches are limited to English language and publications after 2007. Titles and abstracts will be screened with full text reviewed to confirm relevance and to descriptively chart the objectives, participants, method, and outcomes.
Chimera states: Coexistence of coherence and incoherence in networks of coupled oscillators
Creators: name: Panaggio, Mark J.
name: Abrams, Daniel M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences
subject: 34C15, 34C23, 35B36, 82C22, 82C44

description: A chimera state is a spatio-temporal pattern in a network of identical coupled oscillators in which synchronous and asynchronous oscillation coexist. This state of broken symmetry, which usually coexists with a stable spatially symmetric state, has intrigued the nonlinear dynamics community since its discovery in the early 2000s. Recent experiments have led to increasing interest in the origin and dynamics of these states. Here we review the history of research on chimera states and highlight major advances in understanding their behaviour.
description: 26 pages, 3 figures
title: Poster: OpenGPT-X - Training Large Language Models on HPC Systems
Creators: name: Penke, Carolin
Publisher: name: Accelerating Devices Lab
Year: 2022
Subjects: Workshop
OpenGPTX

description: Artificial neural networks represent an HPC workload with increasing importance. In particular the field of Natural Language Processing (NLP) has been undergoing a revolution in recent years. The training of ever larger language models, such as GPT-3, demands large HPC resources and has the potential to greatly impact everyday technology. The OpenGPT-X project was established in 2022 and aims to not leave this field to large tech companies but to provide an open, publicly funded alternative based on European values. The J�lich Supercomputing Centre is a consortium partner providing HPC infrastructure for the pre-training of the models. We research the optimization potential in the training process for example by using novel accelerator architectures.
Ain-El-Turck 041
Creators: name: Corsner, Private.
Publisher: name: Galter Health Science Library & Learning Center
Year: 2019

description: July 43 MM-MBS-COR-43-7114 Oran, N.A. 12th Gen. Hosp. View inside Col. Sturgeon's Office. L to R - 1st Lt. Elijah H. Overfield, adjutant; Col. John H. Sturgeon, C.O.; Lt. Col. Enzo F. Castaldo, Exec. Off. Photographer: Pvt. Corsner.
What Empathy Can(not) Do. An Inquiry into the Epistemic Possibilities and Limits of Empathic Imagination.
Creators: name: INCHINGOLO, MARCO
Publisher: name: Universit� degli studi di Genova
Year: 2021

description: In my dissertation, I am going to argue that empathy is a cognitive process through which we imagine another?s first-person perspective in a given situation. Empathy aims at providing empathizers with an insight into ?what it feels like? to be in somebody else?s shoes. I call this phenomenon phenomenal insight. In light of this account, I am going to show some of empathy?s major epistemic possibilities and limits. The dissertation is so structured. In Chapter I, I will engage with the literature devoted to the definition of empathy. From this debate, I extrapolate a pattern of basic features that are shared by most accounts. I then introduce the definition of empathy I will be dealing with throughout the present work. In Chapter II, I engage with the view that regards empathy as capable of providing us with an understanding of other people's reasons for action, where reasons are to be taken as constituted by a belief-desire couple. I criticize the belief-desire model and argue for the inclusion of emotions as full-right reason-giving states. I show how emotions' main source of motivation can be found in the way in which they are phenomenally experienced by subjects. I then argue for phenomenal insight as a way to grasp the reason-giving dimension of emotional states. Attached to this chapter I put an Appendix in which I explore more in detail how it is possible for us to first-personally imagine emotional states. In Chapter III, I argue that what can be empathically imagined is bound to the kind of individuals we are, i.e. to our preferences, values, dispositions, etc. When trying to imagine other people's perspectives, traces of our ?selves? can be found in what and how we imagine. I use the case of ?imaginative resistance? as a vivid example of this phenomenon. I further defend my claims by resorting to some relevant empirical work in social psychology and neuroscience. In Chapter IV, I engage with the debate on transformative experiences (TEs). TEs could, indeed, be interpreted as highlighting major limits of our imaginative capabilities due to the kind of selves we are. The stock of experiences we had constrains our capability to conjure up the relevant imaginings about experiences we did not personally undergo. At the same time, the kind of ?self? we are impedes us to fully appreciate a different self?s perspective. In Chapter V, I show how the challenges to empathy explored in the previous chapter can be counterbalanced. This allows me to show some surprising features of empathy that are seldom discussed in contemporary literature, namely the possibility to learn via empathy and the possibility to change via empathy. On the one hand, I show how empathy, by stretching our imagination, can provide us with phenomenal insight into experiences we did not actually undergo. On the other hand, I show how empathy, by exposing ourselves to new perspectives, can change us as individuals.
Detecting patterns of species diversification in the presence of both rate shifts and mass extinctions
Creators: name: Laurent, Sacha
name: Robinson-Rechavi, Marc
name: Salamin, Nicolas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Recent methodological advances are enabling better examination of speciation and extinction processes and patterns. A major open question is the origin of large discrepancies in species number between groups of the same age. Existing frameworks to model this diversity either focus on changes between lineages, neglecting global effects such as mass extinctions, or focus on changes over time which would affect all lineages. Yet it seems probable that both lineages differences and mass extinctions affect the same groups. Here we used simulations to test the performance of two widely used methods, under complex scenarios. We report good performances, although with a tendency to over-predict events when increasing the complexity of the scenario. Overall, we find that lineage shifts are better detected than mass extinctions. This work has significance for assessing the methods currently used for estimating changes in diversification using phylogenies and developing new tests.
description: 34 pages, 11 figures
Transient phenomena induced by thunderstorm outflows on slender structures
Creators: name: BRUSCO, STEFANO
Publisher: name: Universit� degli studi di Genova
Year: 2021

description: The climatology at mid-latitudes (for instance, Europe) is dominated by both extra-tropical depressions at the synoptic scale and by mesoscale thunderstorm outflows (also called downbursts). Thunderstorm outflows are non-stationary phenomena, complex and potentially devastating, which strongly differ from synoptic winds under many points of view (genesis, scale, duration above all). Consequently, the induced wind fields are highly different. Modern codes and guidelines are mainly based on the cyclonic model, because of the persistent lack of knowledge about thunderstorm outflows, in particular concerning full-scale measurements. On the other hand, severe wind damage is often induced by downbursts, especially concerning low- and medium- rise structures (e.g., cranes, small turbines, light poles, low-canopies). The present PhD Thesis is collocated within the framework of the ERC THUNDERR Project. It investigates aspects connected with the aerodynamic loading of structures subjected to thunderstorm outflows, particularly focusing on the transient aerodynamics and transient aeroelasticity. This is firstly pursued through the definition of analytical formulations which, starting from compatible vertical wind fields, permit to evaluate the aerodynamic wind loading by using the strip and quasi-steady theory. The application of the procedures on selected slender test structures shows that a crucial role is played by thunderstorm-induced variations of the wind angle of attack, which may increase or reduce the structure response. The second part of the Thesis is devoted to an extensive experimental campaign carried out at the multiple-fan wind tunnel of the Tamkang University, Taipei, which is able to simulate unsteady flows. The sectional model of a sharp-edged square cylinder, equipped with 94 pressure taps, is investigated and numerous configurations of the flow parameters are considered in order to study the effects of acceleration on the aerodynamic loads and on the vortex-shedding from the body. The drag coefficients and the fluctuating cross-flow force coefficients connected with vortex shedding are found to be either comparable or definitely lower than their corresponding values for steady flows. Furthermore, discontinuities of the shedding frequency are present during the transients and their number and magnitude appear to be connected with the acceleration of the flow.
From random Poincaré maps to stochastic mixed-mode-oscillation patterns
Creators: name: Berglund, Nils
name: Gentz, Barbara
name: Kuehn, Christian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: Probability (math.PR)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37H20, 34E17 (primary), 60H10 (secondary)

description: We quantify the effect of Gaussian white noise on fast--slow dynamical systems with one fast and two slow variables, which display mixed-mode oscillations owing to the presence of a folded-node singularity. The stochastic system can be described by a continuous-space, discrete-time Markov chain, recording the returns of sample paths to a Poincaré section. We provide estimates on the kernel of this Markov chain, depending on the system parameters and the noise intensity. These results yield predictions on the observed random mixed-mode oscillation patterns. Our analysis shows that there is an intricate interplay between the number of small-amplitude oscillations and the global return mechanism. In combination with a local saturation phenomenon near the folded node, this interplay can modify the number of small-amplitude oscillations after a large-amplitude oscillation. Finally, sufficient conditions are derived which determine when the noise increases the number of small-amplitude oscillations and when it decreases this number.
description: 56 pages, 14 figures; revised version
Transformational Change (The 9th Annual Health Science Lively Lunch): Developments 2008-2009
Creators: name: Kubilius, Ramune K.
Publisher: name: Galter Health Science Library & Learning Center
Year: 2020

description: Handout prepared for and presented in synopsis during a brief (traditional) annual update of interesting and noteworthy trends in the health publishing and health information sectors that occurred or were noticed since the 2008 Health Sciences Lively Lunch at the Charleston Conference: Issues in Book and Serial Acquisition. (9th Lively Lunch took place on Friday, November 6, 2009 in Charleston, SC).
Pluri-Canonical Models of Supersymmetric Curves
Creators: name: Codogni, Giulio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This paper is about pluri-canonical models of supersymmetric (susy) curves. Susy curves are generalisations of Riemann surfaces in the realm of super geometry. Their moduli space is a key object in supersymmetric string theory. We study the pluri-canonical models of a susy curve, and we make some considerations about Hilbert schemes and moduli spaces of susy curves.
description: To appear in the proceedings of the intensive period "Perspectives in Lie Algebras", held at the CRM Ennio De Giorgi, Pisa, Italy, 2014
Fenntartható közétkeztetés és a rövid ellátási láncok kapcsolatának vizsgálata – elemzési módszertan kidolgozása és bemutatása egy hazai eset példáján keresztül
Creators: name: Diófási-Kovács, Orsolya
name: Freund, Anna
Publisher: name: BI-KA LOGISZTIKA Kft.
Year: 2021

description: Logisztikai trendek és legjobb gyakorlatok (Nyomtatott ISSN: 2416-0555, Online ISSN: 2560-0362), 2021. december, VII. évfolyam, 2. szám
Differential Calculus on Graphon Space
Creators: name: Diao, Peter
name: Guillot, Dominique
name: Khare, Apoorva
name: Rajaratnam, Bala
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 05C99

description: Recently, the theory of dense graph limits has received attention from multiple disciplines including graph theory, computer science, statistical physics, probability, statistics, and group theory. In this paper we initiate the study of the general structure of differentiable graphon parameters $F$. We derive consistency conditions among the higher Gâteaux derivatives of $F$ when restricted to the subspace of edge weighted graphs $\mathcal{W}_{\bf p}$. Surprisingly, these constraints are rigid enough to imply that the multilinear functionals $Λ: \mathcal{W}_{\bf p}^n \to \mathbb{R}$ satisfying the constraints are determined by a finite set of constants indexed by isomorphism classes of multigraphs with $n$ edges and no isolated vertices. Using this structure theory, we explain the central role that homomorphism densities play in the analysis of graphons, by way of a new combinatorial interpretation of their derivatives. In particular, homomorphism densities serve as the monomials in a polynomial algebra that can be used to approximate differential graphon parameters as Taylor polynomials. These ideas are summarized by our main theorem, which asserts that homomorphism densities $t(H,-)$ where $H$ has at most $N$ edges form a basis for the space of smooth graphon parameters whose $(N+1)$st derivatives vanish. As a consequence of this theory, we also extend and derive new proofs of linear independence of multigraph homomorphism densities, and characterize homomorphism densities. In addition, we develop a theory of series expansions, including Taylor's theorem for graph parameters and a uniqueness principle for series. We use this theory to analyze questions raised by Lovász, including studying infinite quantum algebras and the connection between right- and left-homomorphism densities.
description: Final version (36 pages), accepted for publication in Journal of Combinatorial Theory, Series A
Consistency of random forests
Creators: name: Scornet, Erwan
name: Biau, Gérard
name: Vert, Jean-Philippe
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Random forests are a learning algorithm proposed by Breiman [Mach. Learn. 45 (2001) 5--32] that combines several randomized decision trees and aggregates their predictions by averaging. Despite its wide usage and outstanding practical performance, little is known about the mathematical properties of the procedure. This disparity between theory and practice originates in the difficulty to simultaneously analyze both the randomization process and the highly data-dependent tree structure. In the present paper, we take a step forward in forest exploration by proving a consistency result for Breiman's [Mach. Learn. 45 (2001) 5--32] original algorithm in the context of additive regression models. Our analysis also sheds an interesting light on how random forests can nicely adapt to sparsity. 1. Introduction. Random forests are an ensemble learning method for classification and regression that constructs a number of randomized decision trees during the training phase and predicts by averaging the results. Since its publication in the seminal paper of Breiman (2001), the procedure has become a major data analysis tool, that performs well in practice in comparison with many standard methods. What has greatly contributed to the popularity of forests is the fact that they can be applied to a wide range of prediction problems and have few parameters to tune. Aside from being simple to use, the method is generally recognized for its accuracy and its ability to deal with small sample sizes, high-dimensional feature spaces and complex data structures. The random forest methodology has been successfully involved in many practical problems, including air quality prediction (winning code of the EMC data science global hackathon in 2012, see http://www.kaggle.com/c/dsg-hackathon), chemoinformatics [Svetnik et al. (2003)], ecology [Prasad, Iverson and Liaw (2006), Cutler et al. (2007)], 3D
Cosmologically probing ultra-light particle dark matter using 21 cm signals
Creators: name: Kadota, Kenji
name: Mao, Yi
name: Ichiki, Kiyomoto
name: Silk, Joseph
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: There can arise ubiquitous ultra-light scalar fields in the Universe, such as the pseudo-Goldstone bosons from the spontaneous breaking of an approximate symmetry, which can make a partial contribution to the dark matter and affect the large scale structure of the Universe. While the properties of those ultra-light dark matter are heavily model dependent and can vary in a wide range, we develop a model-independent analysis to forecast the constraints on their mass and abundance using futuristic but realistic 21 cm observables as well as CMB fluctuations, including CMB lensing measurements. Avoiding the highly nonlinear regime, the 21 cm emission line spectra are most sensitive to the ultra-light dark matter with mass m ~10^{-26} eV for which the precision attainable on mass and abundance bounds can be of order of a few percent.
description: 14 pages, 6 figures, More discussion on free streaming and references are added. Typos corrected
Correlation structure of the corrector in stochastic homogenization
Creators: name: Mourrat, Jean-Christophe
name: Otto, Felix
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: Recently, the quantification of errors in the stochastic homogenization of divergence-form operators has witnessed important progress. Our aim now is to go beyond error bounds, and give precise descriptions of the effect of the randomness, in the large-scale limit. This paper is a first step in this direction. Our main result is to identify the correlation structure of the corrector, in dimension $3$ and higher. This correlation structure is similar to, but different from that of a Gaussian free field.
description: Published at http://dx.doi.org/10.1214/15-AOP1045 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
1980-Peastrel-Lynch-Armenti-Terminal_velocity_of_a_shuttlecock_in_vertical_fall
Creators: name: Peastrel, M.
Publisher: name: QUBES Educational Resources
Year: 2023

description: This paper offers a set of data on a falling shuttlecock (the moving object in badminton) in air. How the authors collected the data is described fully and can be replicated easily by modern equipment.
SIROJIDDIN SIDQIY XONDAYLIQIY HAYOTI VA IJODINING O'RGANILISHI VA MANBALARI
Creators: name: Abdujabborova, Intizor
Publisher: name: Zenodo
Year: 2024

description: XX asr boshlarida yashab ijod etgan, ma’rifatparvar iste’dodli so‘z san’atkorlardan biri Sirojiddin Sidqiy Xondayliqiydir. Ushbu maqolada Sirojiddin Sidqiy Xondayliqiy va uning hayoti va ijodi oʻrganilgan
A qualitative interview study on persistent death wishes
Creators: name: van Veen, Sisco
name: Elzinga, Elke
name: Palm, Mette
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences

description: By means of a literature review and interviews with experts and experiential experts, we want to gain insights into the origin and course of persistent suicidality in this exploratory study and to answer the following questions: - What is the difference between a persistent death wish and persistent suicidality? - How is persistent suicidality defined according to experts? - Are there factors associated with persistent suicidality? - What are the needs of people with persistent suicidality? - And what would be an appropriate response in the prevention or treatment of persistent suicidality?
Intimate Partner Violence and physical diseases: an exploratory study
Creators: name: Sorrentino, Anna
name: Alfano, Valentina
Publisher: name: Psychology Hub
Year: 2023

description: Intimate Partner Violence (IPV) is a transversal phenomenon that affects a significant number of women and female adolescents in the world. Although several and numerous studies have investigated various negative consequences associated with exposure to IPV, few have focused on the physical diseases associated with exposure to physical, psychological, and sexual violence. The present study aims to analyze the association between past or present IPV victimization and the presence of physical disease, in particular, investigating the unique contribution of physical, psychological, and sexual violence on IPV victims’ likelihood of reporting physical diseases diagnoses by surveying 133 women victims of IPV recruited from various anti-violence centers (CAV). The results showed that women who experienced psychological violence were more at risk of reporting cardiovascular disorders and a diagnosis of benign neoplasm; moreover, women who believed that their physical disease was linked to exposure to IPV showed a higher presence of gastrointestinal disorders. The results are discussed, along with possible applications for prevention and intervention strategies.
description: Psychology Hub, Vol. 40 No. 1 (2023)
Effective action for a free scalar field in the presence of spacetime foam
Creators: name: Kirillov, A. A.
name: Savelova, E. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We model spacetime foam by a gas of virtual wormholes. For a free scalar field we derive the effective Lagrangian which accounts for the interaction with spacetime foam and contains two additional non-local terms. One term describes the scattering of scalar particles on virtual wormholes and explicitly reproduces the Pauli-Villars regularization procedure. The second term describes the back reaction of particles on the number density of wormholes and introduces a self-interaction between particles.
Anatomy class in amphitheater at the Twenty-Sixth Street building
Creators: name: Creator Not Identified
Publisher: name: Galter Health Science Library & Learning Center
Year: 2016

description: Anatomy class in amphitheater at the Twenty-Sixth Street building, 1885. The Chicago Medical College (now called Northwestern University, Feinberg School of Medicine) was located in its third location, Twenty-Sixth Street and Prairie Avenue, from 1870-1893. (Photograph and its description can be found on p. 79 of: Northwestern University Medical School 1859-1979 / Leslie B. Arey, Northwestern University: Evanston and Chicago, revised and extended edition).
Estimating time-changes in noisy Lévy models
Creators: name: Bull, Adam D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 91G70 (primary), 62G08, 62G20, 62G35 (secondary)

description: In quantitative finance, we often model asset prices as a noisy Ito semimartingale. As this model is not identifiable, approximating by a time-changed Levy process can be useful for generative modelling. We give a new estimate of the normalised volatility or time change in this model, which obtains minimax convergence rates, and is unaffected by infinite-variation jumps. In the semimartingale model, our estimate remains accurate for the normalised volatility, obtaining convergence rates as good as any previously implied in the literature.
description: Published in at http://dx.doi.org/10.1214/14-AOS1250 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Transport of and Radiation Production by Trans-relativistic/Non-relativistic Particles Moving Through Sub-Larmor-Scale Electromagnetic Turbulence
Creators: name: Keenan, Brett D.
name: Ford, Alexander L.
name: Medvedev, Mikhail V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Plasmas with electromagnetic fields turbulent at sub-Larmor-scales are a feature of a wide variety of high-energy-density environments, and are essential to the description of many astrophysical/laboratory plasma phenomena. Radiation from particles, whether they be relativistic or non-relativistic, moving through small-scale magnetic turbulence has spectral characteristics distinct from both synchrotron and cyclotron radiation. The radiation, carrying information on the statistical properties of the magnetic turbulence, is also intimately related to the particle diffusive transport. We have investigated, both theoretically and numerically, the transport of non-relativistic and trans-relativistic particles in plasmas with high-amplitude isotropic sub-Larmor-scale magnetic turbulence, and its relation to the spectra of radiation simultaneously produced by these particles. Consequently, the diffusive and radiative properties of plasmas turbulent on sub-Larmor scales may serve as a powerful tool to diagnosis laboratory and astrophysical plasmas.
description: 14 pages, 16 figures
Property RD and the Classification of Traces on Reduced Group $C^*$-algebras of Hyperbolic Groups
Creators: name: Gong, Sherry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: In this paper, we show that if $G$ by a non-elementary word hyperbolic group and $a \in G$ an element, if the conjugacy class of $a$ is infinite, then all traces $τ:C^*_{\text{red}}(G) \to \mathbb{C}$ vanish on $a$. We show that all traces $θ:C^*_{\text{red}}(G) \to \mathbb{C}$ are linear combinations of traces $χ_g:C^*_{\text{red}}(G) \to \mathbb{C}$ given by \[χ_{g}=\begin{cases} 1 & g \in C(g) \\ 0 & \text{else}\end{cases}\] where $C(g)$ is the conjugacy class of $g$. To do this, we introduce a new method to study traces, using Sobolev norms and property RD.
title: Mixed-Anion and Low Thermal Conductivity Materials
Creators: name: Newnham, Jon A
Publisher: name: University of Liverpool Repository
Year: 2026

description: The world we inhabit is intricately shaped by the materials we use, and our choices in those materials impacts many diverse aspects of our lives. Therefore, it is important to design, make, and characterise new materials that have the potential to help us surpass ever increasing structural and efficiency demands. Mixed-anion materials are becoming increasingly important in this regard as different anions often vary more greatly in their physical properties than cations do. This variation often results in mixed-anion materials forming layered structural motifs than can be alternated or stacked allowing for the simple design and identification of new materials with targeted properties.

With the many varied chemistries that result from mixed-anion materials, the current literature is likely only scratching the surface on what can be achieved. The aims of this thesis were therefore 4-fold: (1) to discover new mixed-anion materials; (2) to investigate the properties of any new materials discovered; (3) to investigate the properties of other uncharacterised mixed-anion materials, and finally; (4) to optimise the properties of new and existing mixed-anion materials for various potential applications.

This thesis expands upon our knowledge of what materials can be designed, identified, and modified through the use of multiple anions. This is partially though the design and discovery of two new mixed-anion materials, but also through the investigations of existing materials and understanding their potential applications.
Wess-Zumino Terms for Relativistic Fluids, Superfluids, Solids, and Supersolids
Creators: name: Delacrétaz, Luca V.
name: Nicolis, Alberto
name: Penco, Riccardo
name: Rosen, Rachel A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the coset construction of low-energy effective actions to systematically derive Wess-Zumino (WZ) terms for fluid and isotropic solid systems in two, three and four spacetime dimensions. We recover the known WZ term for fluids in two dimensions as well as the very recently found WZ term for fluids in three dimensions. We find two new WZ terms for supersolids that have not previously appeared in the literature. In addition, by relaxing certain assumptions about the symmetry group of fluids we find a number of new WZ terms for fluids with and without charge, in all dimensions. We find no WZ terms for solids and superfluids.
description: 5 pages, additional references and acknowledgments, fewer typos, better reflects published version
Integrating Data Mining and Knowledge Management to Improve Customer Relationship Management in Banking Industry (Case Study of Caspian Credit Institution).
Creators: name: ordouei, mohammad
name: BaniRostam, Touraj
Publisher: name: figshare
Year: 2023
Subjects: Data mining and knowledge discovery
Cloud computing
Network engineering
Software engineering not elsewhere classified

description: Banks and financial - credit institutions by customer relationship management database analysis can manage to identify customers and allocate resources to profitable customers in a better manner. This study aims to find an index for customers, using customer characteristics to identify significant profitable customers of banking system. In this way we will be able to provide them with more adequate facilities. To do so, mix method of fuzzy clustering and imperialist competitive algorithm has been applied to accomplish customer data clustering; then Fuzzy C-Means and criteria of sum of intra – cluster distances were used to evaluate the method. Results display minimum and maximum as 39.270153 and 53.100917 respectively which at least are 6000 units less than the compared method. This indicates advantage of the suggested method compare to the other.
Coefficients of Sylvester's Denumerant
Creators: name: Baldoni, Velleda
name: Berline, Nicole
name: De Loera, Jesús
name: Dutra, Brandon
name: Köppe, Matthias
name: Vergne, Michèle
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: For a given sequence $\mathbfα = [α_1,α_2,\dots,α_{N+1}]$ of $N+1$ positive integers, we consider the combinatorial function $E(\mathbfα)(t)$ that counts the nonnegative integer solutions of the equation $α_1x_1+α_2 x_2+\cdots+α_{N} x_{N}+α_{N+1}x_{N+1}=t$, where the right-hand side $t$ is a varying nonnegative integer. It is well-known that $E(\mathbfα)(t)$ is a quasi-polynomial function in the variable $t$ of degree $N$. In combinatorial number theory this function is known as Sylvester's denumerant. Our main result is a new algorithm that, for every fixed number $k$, computes in polynomial time the highest $k+1$ coefficients of the quasi-polynomial $E(\mathbfα)(t)$ as step polynomials of $t$ (a simpler and more explicit representation). Our algorithm is a consequence of a nice poset structure on the poles of the associated rational generating function for $E(\mathbfα)(t)$ and the geometric reinterpretation of some rational generating functions in terms of lattice points in polyhedral cones. Our algorithm also uses Barvinok's fundamental fast decomposition of a polyhedral cone into unimodular cones. This paper also presents a simple algorithm to predict the first non-constant coefficient and concludes with a report of several computational experiments using an implementation of our algorithm in LattE integrale. We compare it with various Maple programs for partial or full computation of the denumerant.
description: minor revision, 28 pages
Ice quivers with potential arising from once-punctured polygons and Cohen-Macaulay modules
Creators: name: Demonet, Laurent
name: Luo, Xueyu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 06B15, 16G30, 16G50, 16G70, 13F60, 16G20, 18E30

description: Given a tagged triangulation of a once-punctured polygon $P^*$ with $n$ vertices, we associate an ice quiver with potential such that the frozen part of the associated frozen Jacobian algebra has the structure of a Gorenstein $K[X]$-order $Λ$. Then we show that the stable category of the category of Cohen-Macaulay $Λ$-modules is equivalent to the cluster category $\mathcal{C}$ of type $D_n$. It gives a natural interpretation of the usual indexation of cluster tilting objects of $\mathcal{C}$ by tagged triangulations of $P^*$. Moreover, it extends naturally the triangulated categorification by $\mathcal{C}$ of the cluster algebra of type $D_n$ to an exact categorification by adding coefficients corresponding to the sides of $P$. Finally, we lift the previous equivalence of categories to an equivalence between the stable category of graded Cohen-Macaulay $Λ$-modules and the bounded derived category of modules over a path algebra of type $D_n$.
description: 50 pages. Several improvements after refereeing. arXiv admin note: text overlap with arXiv:1307.0676
Characterization of advanced materials for low-frequency Vibrational Energy Harvesting (VEH)
Creators: name: PAOLINI, GIULIO
Publisher: name: Universit� degli studi di Genova
Year: 2022

description: Nowadays sensors are among the most exploited systems in everyday life, with several applications stimulating an increasing amount of research. They generally require external power, thus adding issues such as maintenance and size constraints. The most promising energy harvesting (EH) technology for miniaturization is Reverse Electro wetting on Dielectric (REWoD). It can provide high power density by exploiting the mechanical modulation of the capacity at the liquid/dielectric interface attaining, without any external bias, power densities of ? �W/cm2. With respect to other EH techniques, REWoD harvests energy from low frequency vibrations (< 10Hz, human motion). I exploited low-cost materials as proof of concept of the feasibility of vibrational EH, suitable for wearable devices, using highly hydrophobic Al and PVDF coated electrodes in combination with polyacrylamide (PAAm) hydrogels loaded with LiCl solutions. The morphology at the sub-micrometer scale and the composition of the outer layers of Al have been studied as a function of the chemical etching time and have been correlated with the surface wettability. The etched Al surfaces exhibit binary structures with nanoscale block-like convexes and hollows, providing more space for air trapping. The analysis shows not only that the change in wetting behaviour correlates with the amount of Al hydroxide at the surface, but also confirms the essential role of the adsorption of airborne carbon compounds. The hydrophobic behaviour depends therefore on the combined effects of surface morphology and surface chemical composition. To compensate for the degradation of the hydrogels with time due to the microstructure of the external oxide layer, an alternative bare Al electrode covered with PVDF has been tested: PAAm hydrogels show now no degradation with time while being able to provide, at frequencies lower than 10 Hz, a peak power/unity of ?0.6 ?Watt, higher than 0.25 ?Watt, obtained by using the Al oxide electrode.
Noisy Bayesian optimization for variational quantum eigensolvers
Creators: name: Iannelli, Giovanni
name: Jansen, Karl
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: computer, quantum
variational
Bayesian
noise
Hamiltonian formalism
Hamiltonian
ground state
hybrid
lattice
lattice field theory
costs
statistical

description: The variational quantum eigensolver (VQE) is a hybrid quantum-classical algorithm used to find the ground state of a Hamiltonian using variational methods. In the context of this Lattice symposium, the procedure can be used to study lattice gauge theories (LGTs) in the Hamiltonian formulation. Bayesian optimization (BO) based on Gaussian process regression (GPR) is a powerful algorithm for finding the global minimum of a cost function, e.g. the energy, with a very low number of iterations using data affected by statistical noise. This work proposes an implementation of GPR and BO specifically tailored to perform VQE on quantum computers already available today.
Open-Access-Konsortien als Instrument gemeinschaftlicher Open-Access-Finanzierung: Kollaboration als Erfolgsfaktor
Creators: name: Benz, Martina
name: Schulz, Katharina
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Konferenzschrift
subject: Open Access
subject: Non-APC
subject: 020

description: Open-Access-Konsortien organisieren die gemeinschaftliche Finanzierung von Open-Access-Publikationen. Dabei kann auf Erfahrungen aus dem traditionellen Konsortialbetrieb aufgebaut werden, der durch neue Aufgaben, Anforderungen an Publikationen, Konsorten und Konsortialführung erweitert wird. Vor allem betonen konsortiale Modelle den kollaborativen Charakter der Finanzierung. In unserem Vortrag berichten wir über die bisherigen Erfahrungen aus dem KOALA-Projekt (Konsortiale Open-Access-Lösungen aufbauen, BMBF-Projekt 2021-2023). Dabei gehen wir darauf ein, welche Aspekte wir für eine erfolgreiche Kollaboration in Open-Access-Konsortien identifizieren und wie diese zum Erreichen der Finanzierungsziele beiträgt. Aufbau und Betrieb von Konsortien erfordern eine eng abgestimmte Kooperation verschiedener Institutionen und Akteure. Für KOALA als Konsortialführerin bedeutet dies, eine Mittler-und Koordinationsrolle zwischen unterschiedlichen Denkweisen, Workflows und Begrifflichkeiten einzunehmen. Dies ist entscheidend, um arbeitsfähige Kooperationsstrukturen zu etablieren, gemeinsame Standards festzusetzen und schließlich eine gemeinschaftliche Open-Access-Finanzierung aufzubauen. So haben wir bspw. in der Akquise mit zahlreichen Herausgeber*inInnen, Redaktionen und Verlagen Gespräche geführt, die uns die Bandbreite institutioneller Kontexte, Bedarfe und Arbeitsweisen vor Augen geführt haben. Ihnen gegenüber erläutert KOALA bibliothekarische Mindeststandards und ein Verständnis der Prozesse einer Finanzverwaltung. Auf der anderen Seite unterstützt KOALA Bibliotheken, deren Erwerbungsentscheidungen auf Logiken aus der Subskriptionszeit basieren, Ausgaben für APC-freies Open Access argumentativ zu begründen. Schließlich befähigt KOALA Redaktionen, Verlage, Herausgeber*inInnen und Bibliotheken, innerhalb einer kollaborativen Konsortialstruktur die Open-Access-Transformation voranzutreiben. Interessengegensätze, z.B. zwischen Verlagen und Bibliotheken oder Zeitschriften lösen sich dabei nicht in Kollaborationsbeziehungen auf; die Kooperation im Konsortium erleichtert es aber, gemeinsame Standards zu etablieren, z.B. in Punkto Kostentransparenz gegenüber Verlagen. Über die erfolgreiche Finanzierung konkreter Publikationen hinaus sind die in KOALA gesammelten Erfahrungen wertvoll für die Diskussion von Möglichkeiten und Grenzen konsortialer Modelle als Instrumente gemeinschaftlicher Open-Access-Finanzierung.
Analisi differenziale sulla diagnostica e il trattamento delle infezioni nosocomiali in ambito postoperatorio cardiochirurgico. Studio retrospettivo effettuato presso Cardiochirurgia ospedale San Martino di Genova
Creators: name: DEL PUENTE, FILIPPO
Publisher: name: Universit� degli studi di Genova
Year: 2022

description: The mortality rate of infections following cardiac surgery has always been very high due to the special conditions of the cardiac surgical patient and the risk of infection with bacteria characterised by an extended spectrum of resistance. The aim of our study was to evaluate which patients were at increased risk of infection with multi-resistant bacteria in a cardiac surgery setting and which patients could benefit from treatment with drugs with a less extensive spectrum of action, in order to save certain types of antibiotic and to generate a lower risk of infection with multi-resistant bacteria. A retrospective case-control analysis was therefore performed on cardiac surgical patients in the time period 2017-2019 analysing the variables classically correlated with increased risk of infection by multi-resistant bacteria. A total of 206 infections were considered by comparing cases (patients infected with multi-resistant bacteria) and controls (patient infected with susceptible bacteria). The results show that the risk of infection with multi-resistant bacteria is most strongly correlated with the presence of a higher Charlson score and a longer duration of previous antibiotic treatment in relation to hospital days. The conclusion of the study, which is limited by its observational nature and the presence of only one study centre, is that a shorter duration of antibiotic treatment in appropriately selected patients could have a positive impact on infections following cardiac surgery.