cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Angles Between Infinite Dimensional Subspaces with Applications to the Rayleigh-Ritz and Alternating Projectors Methods
Creators: name: Knyazev, Andrew
name: Jujunashvili, Abram
name: Argentati, Merico
Publisher: name: arXiv
Year: 2007
Subjects: subject: Numerical Analysis (math.NA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 65J99, 46N40, Secondary 47N30, 62H20

description: We define angles from-to and between infinite dimensional subspaces of a Hilbert space, inspired by the work of E. J. Hannan, 1961/1962 for general canonical correlations of stochastic processes. The spectral theory of selfadjoint operators is used to investigate the properties of the angles, e.g., to establish connections between the angles corresponding to orthogonal complements. The classical gaps and angles of Dixmier and Friedrichs are characterized in terms of the angles. We introduce principal invariant subspaces and prove that they are connected by an isometry that appears in the polar decomposition of the product of corresponding orthogonal projectors. Point angles are defined by analogy with the point operator spectrum. We bound the Hausdorff distance between the sets of the squared cosines of the angles corresponding to the original subspaces and their perturbations. We show that the squared cosines of the angles from one subspace to another can be interpreted as Ritz values in the Rayleigh-Ritz method, where the former subspace serves as a trial subspace and the orthogonal projector of the latter subspace serves as an operator in the Rayleigh-Ritz method. The Hausdorff distance between the Ritz values, corresponding to different trial subspaces, is shown to be bounded by a constant times the gap between the trial subspaces. We prove a similar eigenvalue perturbation bound that involves the gap squared. Finally, we consider the classical alternating projectors method and propose its ultimate acceleration, using the conjugate gradient approach. The corresponding convergence rate estimate is obtained in terms of the angles. We illustrate a possible acceleration for the domain decomposition method with a small overlap for the 1D diffusion equation.
description: 22 pages. Accepted to Journal of Functional Analysis
Spatiotemporal control of surface plasmon polariton wave packets with nanocavities
Creators: name: Ichiji, Naoki
name: Otake, Yuka
name: Kubo, Atsushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Modulation of the optical index by means of atomic and material resonances provides a basis for controlling light propagation in natural and artificially fabricated materials. In addition, recent advances in the tuning of spatiotemporal couplings of ultrashort laser pulses have enabled almost arbitrary control over the group velocity of light. Here, using femtosecond time-resolved microscopy and numerical calculations, we investigate the spatiotemporal dynamics of a surface plasmon polariton wave packet (SPP WP) that interacts with a plasmonic nanocavity. The nanocavity consists of metal-insulator-metal multilayer films that function as subwavelength meta-atom possessing tunable discretized eigenmodes. When a chirp-induced femtosecond SPP WP is incident on a nanocavity, only the spectral component matching the resonance energy is transmitted. This spectral clipping effect is accompanied by a spatial shift of the WP. The shift can be adjusted in either the positive or negative direction by controlling the resonance energy or the chirp. If this spatial shift is regarded as a modulation of the apparent group velocity in the nanocavity, the range of modulation includes superluminal, subluminal, and negative group velocities.
description: 11 pages, 5 figures
Equation-of-state model for shock compression of hot dense matter
Creators: name: Pain, J. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A quantum equation-of-state model is presented and applied to the calculation of high-pressure shock Hugoniot curves beyond the asymptotic fourfold density, close to the maximum compression where quantum effects play a role. An analytical estimate for the maximum attainable compression is proposed. It gives a good agreement with the equation-of-state model.
Exact $k$-body representation of the Jaynes-Cummings interaction in the dressed basis: Insight into many-body phenomena with light
Creators: name: Smith, Kevin C.
name: Bhattacharya, Aniruddha
name: Masiello, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Analog quantum simulation - the technique of using one experimentally well-controlled physical system to mimic the behavior of another - has quickly emerged as one of the most promising near term strategies for studying strongly correlated quantum many-body systems. In particular, systems of interacting photons, realizable in solid-state cavity and circuit QED frameworks, for example, hold tremendous promise for the study of nonequilibrium many-body phenomena due to the capability to locally create and destroy photons. These systems are typically modeled using a Jaynes-Cummings-Hubbard (JCH) Hamiltonian, named due to similarities with the Bose-Hubbard (BH) model. Here, we present a non-perturbative procedure for transforming the JC Hamiltonian into a dressed operator representation that, in its most general form, admits an infinite sum of bosonic $k$-body terms where $k$ is bound only by the number of excitations in the system. We closely examine this result in both the dispersive and resonant coupling regimes, finding rapid convergence in the former and contributions from $k\gg1$ in the latter. Through extension to a two-site JCH system, we demonstrate that this approach facilitates close inspection of the analogy between the JCH and BH models and its breakdown for resonant light-matter coupling. Finally, we use this framework to survey the many-body character of a two-site JCH for general system parameters, identifying four unique quantum phases and the parameter regimes in which they are realized, thus highlighting phenomena realizable with finite JCH-based quantum simulators beyond the BH model. More broadly, this work is intended to serve as a clear mathematical exposition of bosonic many-body interactions underlying JC-type systems, often postulated through analogy to Kerr-like nonlinear susceptibilities or by matching coefficients to obtain the appropriate eigenvalue spectrum.
description: 25 pages, 6 figures
Calculating the probability of detecting radio signals from alien civilizations
Creators: name: Horvat, Marko
Publisher: name: arXiv
Year: 2007
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications can yield the probability of detecting a genuine alien radio signal.
description: 10 pages, 1 figure, 2 tables; corrected typos and missing references
Generalized KG-oscillator with a uniform magnetic field under the influence of Coulomb-type potentials in cosmic string space-time and Aharonov-Bohm effect
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We solve a generalized Klein-Gordon oscillator (KGO) in the presence of a uniform magnetic field including quantum flux under the effects of a scalar and vector potentials of Coulomb-types in the static cosmic string space-time. We obtain the energy eigenvalues and corresponding eigenfunctions, and analyze a relativistic analogue of the Aharonov-Bohm effect for bound states
description: 18 pages, accepted in Canadian Journal of Physics (https://doi.org/10.1139/cjp-2020-0565)
title: Geologic Characterization, Hydrologic Monitoring, and Soil-Water Relationships for Landslides in Kentucky
Creators: name: Crawford, Matt
name: Bryson, Lindsey
name: Wang, Zhenming
name: Woolery, Edward W.
Publisher: name: Kentucky Geological Survey, University of Kentucky
Year: 2020
Subjects: subject: FOS: Natural sciences

description: Complex spatial and temporal variables control the movement of water through colluvial soils in hillslopes. Some of the factors that influence soil-moisture fluctuation are soil type, thickness, porosity and permeability, and slope morphology. Landslide-characterization and field-monitoring techniques were part of a method to connect hydrologic and geotechnical data in order to monitor long-term hydrologic conditions in three active landslides in Kentucky, establish hydrologic relationships across the slope, and analyze specific soil-water relationships that can predict shear strength. Volumetric water content, water potential, and electrical conductivity were measured between October 2015 and February 2019. The duration and magnitude of drying and wetting within the soil varied for each slope location and soil depth, suggesting that differences in slope morphology, soil texture, and porosity influence the water-infiltration process, as well as shear strength and general landslide dynamics. The parameters measured and soil-water relationships were also compared to rainfall and slope movement at one of the landslides.

The method used to acquire hydrologic data was cost-effective, and the field techniques may be useful for subsequent projects, such as slope-stability assessments and landslide-susceptibility modeling. Hydrologic parameters, volumetric water content, and water potential are pertinent to investigating the stability of landslides, which are often triggered or reactivated by rainfall. These methods can be used to support landslide-hazard assessment and improve our understanding of the long-term influence of moisture conditions in hillslope soils.
description: © 2019 University of Kentucky
Series 13, Report of Investigations 11
Electron operator at the edge of the 1/3 fractional quantum Hall liquid
Creators: name: Jolad, Shivakumar
name: Chang, Chia-Chen
name: Jain, Jainendra K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This study builds upon the work of Palacios and MacDonald (Phys. Rev. Lett. {\bf 76}, 118 (1996)), wherein they identify the bosonic excitations of Wen's approach for the edge of the 1/3 fractional quantum Hall state with certain operators introduced by Stone. Using a quantum Monte Carlo method, we extend to larger systems containing up to 40 electrons and obtain more accurate thermodynamic limits for various matrix elements for a short range interaction. The results are in agreement with those of Palacios and MacDonald for small systems, but offer further insight into the detailed approach to the thermodynamic limit. For the short range interaction, the results are consistent with the chiral Luttinger liquid predictions.We also study excitations using the Coulomb ground state for up to nine electrons to ascertain the effect of interactions on the results; in this case our tests of the chiral Luttinger liquid approach are inconclusive.
description: 10 pages, 2 figures
title: Die Irrfahrt der St. Louis. In fünf Wochen von Hamburg über Kuba nach Antwerpen
Creators: name: Schöck-Quinteros, Eva
Publisher: name: ZZF - Centre for Contemporary History: Visual History
Year: 2019

description: Vor 80 Jahren, am 17. Juni 1939, landete die „St. Louis“ in Antwerpen. Am 13. Mai 1939 war sie in Hamburg mit 937 Kindern, Frauen und Männern an Bord Richtung Kuba gestartet, darunter 930 deutsche Jüdinnen und Juden. Schon zwei Wochen später war die St. Louis im Hafen von Havanna angekommen. Doch die Landung wurde ihr verweigert – für die Passagiere völlig überraschend. Die „Irrfahrt“ der St. Louis war wochenlang ein Thema in der internationalen Presse. Zeitgenössische Medien berichteten ausführlich über die vergeblichen Verhandlungen des JDC, über die Aktivitäten des Kapitäns und des von ihm ernannten Bordkomitees, über Selbstmordversuche im Hafen von Havanna und über den Plan einiger Passagiere, im Falle einer Rückkehr nach Hamburg kollektiv Suizid zu begehen.
title: Κύτταρο πολιτισμού στη ρεματιά Χαλανδρίου
title: Cell of Culture in Chalandri ravine
Creators: name: Γιαννικαπανης Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2025

description:  Η παρούσα διπλωματική εργασία επιχειρεί την αναζωογόνηση του Ευριπίδειου θέατρου ρεματιάς Χαλανδρίου και της ευρύτερης περιοχής μέσω της δημιουργίας ενός κέντρου πολιτισμού και της ανανέωσης του δημοσίου χώρου με σκοπό την εδραίωση ενός σημείου ενδιαφέροντος όχι μόνο τους θερινούς μήνες κατά τη διάρκεια του φεστιβάλ ρεματιάς, αλλά καθ’ όλη τη διάρκεια του χρόνου.
Supplementary document for Improving cone identification using merged non-confocal quadrant-detection adaptive optics scanning light ophthalmoscope images - 7214584.pdf
Creators: name: Chui, Toco
name: Migacz, Justin
name: Duran, Luis Muncharaz
name: Haq, Affan
name: Otero-Marquez, Oscar
name: Dubra, Alfredo
name: Rosen, Richard
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Ophthalmology
Vision Science

description: Supplement 1
Recreation planning for mountain resort communities
Creators: name: Melville, Lauren Marianne
Publisher: name: University of British Columbia
Year: 2010

description: Recreation planners at mountain resort communities must decide what types of recreation facilities and activities to provide in order to meet the diverse needs of the community. This thesis attempts to answer this question specifically for the Resort Municipality of Whistler. Determinants of participation in recreation are highly psychological. Thus, description of potential client groups must rely heavily upon attitudes, perceptions, and behavior. Theories of recreation serve as a useful planning tool helping planners understand peoples' recreation desires. A clear understanding of what people want recreation to accomplish for them is crucial when deciding what type of recreation facilities and activities to provide. However, as discovered when examining resort communities, it is not enough for planners just to take into account functional considerations when planning recreation facilities. Planners must be aware of the resort's image. People typically visit a resort community because they identify with its image. Images are based upon peoples' impressions of the entire resort community, including the facilities offered and both the natural and built environment. The challenge for the planner is to translate peoples' recreation desires into facilities that serve as concrete expressions of the resort's image. This thesis develops as framework to consider such a challenge. This is achieved by: a review of recreation theory and resort planning literature; review of resort communities similar to Whistler; informal interviews, and by a survey of Whistler property owners administered by the author. There are three main findings. First, recreation theory is an invaluable planning tool in helping planners decide what type of recreation facilities to provide. Second, recreation planners can help create a particular type of resort by providing facilities; however, the market eventually determines the resort's status. Third, more substantial market research is required to determine what type of resort the Municipality of Whistler should strive to become.
title: Investigation of Coal Burst Potential Using Numerical Modeling and Rock Burst Indices
Creators: name: Cárdenas Triana, Cristian David
Publisher: name: University of Kentucky Libraries
Year: 2021
Subjects: subject: FOS: Environmental engineering
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Coal bursts are typically defined as a rapid failure of coal or surrounding rock producing a violent release of energy and ejection of rock particles. This phenomenon is extremely complex and dynamic, and this has made it very difficult to predict. In the last decades, different researchers have aimed to understand the sources and mechanisms of failure of coal bursts. Various indices have been developed to assess the burst potential such as the Burst Potential Index (BPI), Energy Storage Rate, and the Strain Energy Density. Lately, numerical modeling has also been used as a tool to examine the rock deformation process and stress distribution at specific mining stages to forecast the burst potential. The present work presents a coupled methodology using numerical modeling and rock burst indices to estimate the burst potential of two coal pillars in a longwall gateroad system. The analysis was conducted using elastic and elastoplastic constitutive models. Results showed that the burst potential index increases when the pillars store sufficient elastic strain energy unless mitigation measures are taken to reduce the strain build-up.
description: © 2021 Cristian Cardenas Triana
Relatively computably enumerable reals
Creators: name: Anderson, Bernard A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03D99

description: A real X is defined to be relatively c.e. if there is a real Y such that X is c.e.(Y) and Y does not compute X. A real X is relatively simple and above if there is a real Y
description: 5 pages. Significant changes from earlier version
Shell-structure effects on high-pressure Rankine-Hugoniot shock adiabats
Creators: name: Pain, J. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Rankine-Hugoniot shock adiabats are calculated in the pressure range 1 Mbar-10 Gbar with two atomic-structure models: the atom in a spherical cell and the atom in a jellium of charges. These quantum self-consistent-field models include shell effects, which have a strong impact on pressure and shock velocity along the shock adiabat. Comparisons with experimental data are presented and quantum effects are interpreted in terms of electronic specific heat. A simple analytical estimate for the maximum compression is proposed, depending on initial density, atomic weight and atomic number.
Tidal Dynamics in Cosmological Spacetimes
Creators: name: Mashhoon, Bahram
name: Mobed, Nader
name: Singh, Dinesh
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the relative motion of nearby free test particles in cosmological spacetimes, such as the FLRW and LTB models. In particular, the influence of spatial inhomogeneities on local tidal accelerations is investigated. The implications of our results for the dynamics of the solar system are briefly discussed. That is, on the basis of the models studied in this paper, we estimate the tidal influence of the cosmic gravitational field on the orbit of the Earth around the Sun and show that the corresponding temporal rate of variation of the astronomical unit is negligibly small.
description: 12 pages, no figures, REVTeX 4.0; appendix added, new references, and minor changes throughout; to appear in Classical and Quantum Gravity; v4: error in (A24) of Appendix A corrected, results and conclusions unchanged. We thank L. Iorio for pointing out the error
Towards perturbative renormalization of $ϕ^2(iϕ)^\varepsilon$ quantum field theory
Creators: name: Felski, Alexander
name: Bender, Carl M.
name: Klevansky, S. P.
name: Sarkar, Sarben
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In a previous paper it was shown how to calculate the ground-state energy density $E$ and the $p$-point Green's functions $G_p(x_1,x_2,...,x_p)$ for the $PT$-symmetric quantum field theory defined by the Hamiltonian density $H=\frac{1}{2}(\nablaϕ)^2+\frac{1}{2}ϕ^2(iϕ)^\varepsilon$ in $D$-dimensional Euclidean spacetime, where $ϕ$ is a pseudoscalar field. In this earlier paper $E$ and $G_p(x_1,x_2,...,x_p)$ were expressed as perturbation series in powers of $\varepsilon$ and were calculated to first order in $\varepsilon$. (The parameter $\varepsilon$ is a measure of the nonlinearity of the interaction rather than a coupling constant.) This paper extends these perturbative calculations to the Euclidean Lagrangian $L= \frac{1}{2}(\nablaϕ)^2+\frac{1}{2}μ^2ϕ^2+\frac{1}{2} gμ_0^2ϕ^2\big(iμ_0^{1-D/2}ϕ\big)^\varepsilon-ivϕ$, which now includes renormalization counterterms that are linear and quadratic in the field $ϕ$. The parameter $g$ is a dimensionless coupling strength and $μ_0$ is a scaling factor having dimensions of mass. Expressions are given for the one-, two, and three-point Green's functions, and the renormalized mass, to higher-order in powers of $\varepsilon$ in $D$ dimensions ($0\leq D\leq2$). Renormalization is performed perturbatively to second order in $\varepsilon$ and the structure of the Green's functions is analyzed in the limit $D\to 2$. A sum of the most divergent terms is performed to {\it all} orders in $\varepsilon$. Like the Cheng-Wu summation of leading logarithms in electrodynamics, it is found here that leading logarithmic divergences combine to become mildly algebraic in form. Future work that must be done to complete the perturbative renormalization procedure is discussed.
description: 15 pages, 4 figures
Testing Gluino Spin with Three-Body Decays
Creators: name: Csaki, Csaba
name: Heinonen, Johannes
name: Perelstein, Maxim
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the possibility of distinguishing a supersymmetric gluino from a Kaluza-Klein gluon of universal extra dimensions (UED) at the Large Hadron Collider (LHC). We focus on the case when all kinematically allowed tree-level decays of this particle are 3-body decays into two jets and a massive daughter (typically weak gaugino or Kaluza-Klein weak gauge boson). We show that the shapes of the dijet invariant mass distributions differ significantly in the two models, as long as the mass of the decaying particle mA is substantially larger than the mass of the massive daughter mB. We present a simple analysis estimating the number of events needed to distinguish between the two models under idealized conditions. For example, for mA/mB=10, we find the required number of events to be of order several thousand, which should be available at the LHC within a few years. This conclusion is confirmed by a parton level Monte Carlo study which includes the effects of experimental cuts and the combinatoric background.
description: 19 pages, 10 figures
Contracts in Electricity Markets under EU ETS: A Stochastic Programming Approach
Creators: name: Abate, Arega Getaneh
name: Riccardi, Rossana
name: Ruiz, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: The European Union Emission Trading Scheme (EU ETS) is a cornerstone of the EU's strategy to fight climate change and an important device for plummeting greenhouse gas (GHG) emissions in an economically efficient manner. The power industry has switched to an auction-based allocation system at the onset of Phase III of the EU ETS to bring economic efficiency by negating windfall profits that have been resulted from grandfathered allocation of allowances in the previous phases. In this work, we analyze and simulate the interaction of oligopolistic generators in an electricity market with a game-theoretical framework where the electricity and the emissions markets interact in a two-stage electricity market. For analytical simplicity, we assume a single futures market where the electricity is committed at the futures price, and the emissions allowance is contracted in advance, prior to a spot market where the energy and allowances delivery takes place. Moreover, a coherent risk measure is applied (Conditional Value at Risk) to model both risk averse and risk neutral generators and a two-stage stochastic optimization setting is introduced to deal with the uncertainty of renewable capacity, demand, generation, and emission costs. The performance of the proposed equilibrium model and its main properties are examined through realistic numerical simulations. Our results show that renewable generators are surging and substituting conventional generators without compromising social welfare. Hence, both renewable deployment and emission allowance auctioning are effectively reducing GHG emissions and promoting low-carbon economic path.
description: 31 Pages, 8 figures, Accepted paper (Energy Economics, 2018)
A Needs Assessment for Surgical Anatomy Curriculum
Creators: name: Kaplan, Brian Jay
Publisher: name: University of Illinois at Chicago
Year: 2024

description: Over the past twenty years, the exposure of medical students to anatomy has decreased. Whereas surgical anatomy is fundamental to safe and proficient surgical practice, its adequate teaching and integration into residency programs are lacking. The study sought to identify key surgical procedures in which surgical anatomy is important and challenging for residents through a survey of faculty and residents. The goal was to develop a comprehensive surgical anatomy curriculum for residency training. An anonymous survey was distributed via Qualtrics to a convenience sample of general surgery program directors across the United States. The survey queried respondents on the importance and perceived difficulty of anatomy for each of the twenty identified procedures. Respondents were also prompted to suggest additional procedures. Faculty respondents overwhelmingly emphasized the importance of anatomical knowledge for all procedures except small intestinal resection. Agreement ranged from 97.5% for hepatic segmentectomy/lobectomy to 72.5% for appendectomy. Procedures such as inguinal and femoral repair, vagotomy and drainage, and anal sphincterotomy were deemed extremely important by virtually all faculty respondents. Faculty rated nine procedures as particularly challenging in terms of anatomy, with hepatic segmentectomy/lobectomy being the most difficult (mean difficulty 4.06). Residents also identified four procedures as notably difficult, including hepatic segmentectomy/lobectomy, vagotomy and drainage, and distal pancreatectomy. The findings underscore the critical role of surgical anatomy in procedural competency. Nine procedures were highlighted as both important and difficult, suggesting areas for focused curriculum development. Tailored educational interventions are needed to enhance residents' understanding of anatomy in these specific procedures, ultimately improving patient outcomes and surgical proficiency.
Future efforts should focus on implementing and evaluating targeted curricular interventions to address identified gaps in surgical anatomy education. The next step is to develop a curriculum to help residents learn the anatomy of these nine procedures in depth.
Abstract polymer models with general pair interactions
Creators: name: Procacci, Aldo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B05

description: A convergence criterion of cluster expansion is presented in the case of an abstract polymer system with general pair interactions (i.e. not necessarily hard core or repulsive). As a concrete example, the low temperature disordered phase of the BEG model with infinite range interactions, decaying polynomially as $1/r^{d+λ}$ with $λ>0$, is studied.
description: 19 pages. Corrected statement for the stability condition (2.3) and modified section 3.1 of the proof of theorem 1 consistently with (2.3). Added a reference and modified a sentence at the end of sec. 2.1
I Love You Just The Way You Are: An Autoethnography About Disability, Belonging, Acceptance and Inclusion
Creators: name: Arnold, Denise R
Publisher: name: University of Illinois at Chicago
Year: 2024

description: Research with the perspectives and experiences of autistic participants who have significant communication barriers is limited. My son Ben is an autistic nonverbal person who has been systematically excluded from mainstream activities including education. The aim of this auto-ethnographical study is to explore how Ben has either benefitted from or been excluded from mainstream activities, programs, and services due to the nature of systemic stigma, institutional attitudes and biases, and the limits of the laws intended to support people with disabilities. As a mother of a nonverbal autistic, I am in a unique position to share our lived experiences seeking supports, accommodations, and access to entitlement programs including a public education under the Individuals with Disabilities Education Act (IDEA, 1990), medical care, and the Americans with Disabilities Act (ADA, 1990) sanctioned higher education accommodations. It is a balancing act of demonstrating need, competencies, and the ability to “fit in” while demanding supports.
In three chapters, the voice of the researcher and the inclusive participant are presented in a narrative format. The first chapter documents Ben’s struggle to receive appropriate support systems under the Americans with Disabilities Act (1990) at a university. The second chapter describes Ben’s abrupt dismissal from a private therapeutic day school and the local public school district’s failure to offer free and appropriate public education in the least restrictive environment. The third chapter is a more personal story about efforts to secure my adult child’s access to programs and services while in the midst of confronting my own abilities to navigate complex medical bureaucracies.
This research collected data of our experiences living nonverbal in a highly communicative world and provides insights into the ways in which systems impact the well-being of nonverbal people with autism.
WDM and Directed Star Arboricity
Creators: name: Amini, Omid
name: Havet, Frederic
name: Huc, Florian
name: Thomasse, Stephan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A digraph is $m$-labelled if every arc is labelled by an integer in $\{1, \dots,m\}$. Motivated by wavelength assignment for multicasts in optical networks, we introduce and study $n$-fibre colourings of labelled digraphs. These are colourings of the arcs of $D$ such that at each vertex $v$, and for each colour $α$, $in(v,α)+out(v,α)\leq n$ with $in(v,α)$ the number of arcs coloured $α$ entering $v$ and $out(v,α)$ the number of labels $l$ such that there is at least one arc of label $l$ leaving $v$ and coloured with $α$. The problem is to find the minimum number of colours $λ_n(D)$ such that the $m$-labelled digraph $D$ has an $n$-fibre colouring. In the particular case when $D$ is $1$-labelled, $λ_1(D)$ is called the directed star arboricity of $D$, and is denoted by $dst(D)$. We first show that $dst(D)\leq 2Δ^-(D)+1$, and conjecture that if $Δ^-(D)\geq 2$, then $dst(D)\leq 2Δ^-(D)$. We also prove that for a subcubic digraph $D$, then $dst(D)\leq 3$, and that if $Δ^+(D), Δ^-(D)\leq 2$, then $dst(D)\leq 4$. Finally, we study $λ_n(m,k)=\max\{λ_n(D) \tq D \mbox{is $m$-labelled} \et Δ^-(D)\leq k\}$. We show that if $m\geq n$, then $\ds \left\lceil\frac{m}{n}\left\lceil \frac{k}{n}\right\rceil + \frac{k}{n} \right\rceil\leq λ_n(m,k) \leq\left\lceil\frac{m}{n}\left\lceil \frac{k}{n}\right\rceil + \frac{k}{n} \right\rceil + C \frac{m^2\log k}{n}$ for some constant $C$. We conjecture that the lower bound should be the right value of $λ_n(m,k)$.
description: 18 pages, 2 figures. Final version
Black-box adversarial attacks using Evolution Strategies
Creators: name: Qiu, Hao
name: Custode, Leonardo Lucio
name: Iacca, Giovanni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In the last decade, deep neural networks have proven to be very powerful in computer vision tasks, starting a revolution in the computer vision and machine learning fields. However, deep neural networks, usually, are not robust to perturbations of the input data. In fact, several studies showed that slightly changing the content of the images can cause a dramatic decrease in the accuracy of the attacked neural network. Several methods able to generate adversarial samples make use of gradients, which usually are not available to an attacker in real-world scenarios. As opposed to this class of attacks, another class of adversarial attacks, called black-box adversarial attacks, emerged, which does not make use of information on the gradients, being more suitable for real-world attack scenarios. In this work, we compare three well-known evolution strategies on the generation of black-box adversarial attacks for image classification tasks. While our results show that the attacked neural networks can be, in most cases, easily fooled by all the algorithms under comparison, they also show that some black-box optimization algorithms may be better in "harder" setups, both in terms of attack success rate and efficiency (i.e., number of queries).
description: To be published in the proceedings of ACM Genetic and Evolutionary Computation Conference (GECCO) Companion 2021
Ekran Baskılı Altın Elektrot Yüzeyine Altın Nanopartikül Modifikasyonu ve Elektrokimyasal Empedans Spektroskopisi Yöntemi İle İncelenmesi
Creators: name: KOÇ, Yücel
name: Uğur Moralı
name: Avcı, Hüseyin
Publisher: name: Zenodo
Year: 2021
Subjects: Ekran baskılı altın elektrot, Altın nanopartikül, Elektrokimyasal empedans spektroskopisi

description: Gün geçtikçe ekran baskılı altın elektrotların (SPGE) kullanımı artmaktadır. SPGE’ler tek kullanımlık olmalarının yanı sıra düşük maliyet, tekrarlanabilirlik ve düşük miktarlarda analit kullanılması gibi avantajları nedeniyle elektrokimyasal çalışmalarda sıklıkla kullanılmaktadır. Mevcut çalışmamızda SPGE yüzeyine elektrobiriktirme ile altın nanopartikul (AuNP) modifikasyonu yapılmıştır. AuNP modifiye edilecek SPGE yüzeyi için optimum modifikasyon süresinin belirlenmesi elektrokimyasal çalışmalarda büyük önem arz etmektedir. Yüksek modifikasyon süreleri elektrotlarda hasarlara neden olurken, düşük modifikasyon süreleri ise SPGE yüzeyinde yeteri kadar AuNP’lerin modifiye edilmesinin önüne geçmektedir. Bu çalışmada 2 mM HAuCl4 (0,5 M H2SO4) çözeltisi ile -0,3 V potansiyel altında AuNP modifikasyonu yapılarak, modifiye edilecek SPGE yüzeyi için optimum modifikasyon süresinin belirlenmesi elektrokimyasal empedans spektroskopisi(EIS) yöntemi kullanılarak gerçekleştirilmiştir. SPGE yüzeyine optimum AuNP modifikasyon süresinin belirlenmesi için 30, 60, 90, 120 ve 150 s’ye kadar değişen biriktirme sürelerinde EIS analizi yapılmıştır. EIS analizi ile 10 kHz ile 0,1 Hz aralığında elde edilen Nyquist grafiğinin eşdeğer devre modeli ile modellenmesi sonucu ile her bir modifikasyon süresi için Rct ve sabit faz elemanın(CPE) katsayısı α değerleri elde edilmiştir. Rct değeri elektrot yüzeyindeki reaksiyonların tayininde ve yüzey katmanlarında gerçekleşen modifikasyonun algılanmasında önemli bir devre elemanıyken, CPE katsayısı α değerleri ise elektrot yüzeyindeki akım dağılımı ve yüzey pürüzlülüğü hakkında bilgi vermektedir. Elde edilen sonuçların incelenmesi sonucu 90 s modifikasyon süresinin en yüksek Rct ve α değerine sahip olduğu görülmüştür. Bu nedenle SPGE üzerine modifiye edilecek AuNP'ler için optimum biriktirme süresinin 90 s olduğu tespit edilmiştir. AuNPs modifikasyonu sonrasında SPGE yüzeyindeki AuNP modifikasyonu taramalı elektron mikroskobu (SEM) analizi ile değerlendirilmiştir. SEM analizi sonucunda belirlenen optimum 90 s modifikasyon süresinde SPGE yüzeyinin deforme olmadığı, yüksek modifikasyon sürelerinde ise elektrot yüzeyinde deformasyon meydana geldiği gözlemlenmiştir.
AC susceptibility and $^{51}$V NMR study of MnV$_2$O$_4$
Creators: name: Baek, S. -H.
name: Choi, K. -Y.
name: Reyes, A. P.
name: Kuhns, P. L.
name: Curro, N. J.
name: Ramanchandran, V.
name: Dalal, N. S.
name: Zhou, H. D.
name: Wiebe, C. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report $^{51}$V zero-field NMR of manganese vanadate spinel of MnV$_2$O$_4$, together with both ac and dc magnetization measurements. The field and temperature dependence of ac susceptibilities show a reentrant-spin-glass-like behavior below the ferrimagnetic(FEM) ordering temperature. The zero-field NMR spectrum consists of multiple lines ranging from 240 MHz to 320 MHz. Its temperature dependence reveals that the ground state is given by the simultaneous formation of a long-range FEM order and a short-range order component. We attribute the spin-glass-like anomalies to freezing and fluctuations of the short-range ordered state caused by the competition between spin and orbital ordering of the V site.
Narcissistic personality and academic underachievement in school age children
Creators: name: Mah, Terry
Publisher: name: University of British Columbia
Year: 2010

description: The achievement (as indexed by standardized test scores) of 56 (54 females and 2 males) private school children was studied in relation to demographic (social status and gender), behavioral (three indicators of persistence), dispositional (clinical and psychometric measures of narcissism), and ability (Otis-Lennon) factors. A clinical procedure and device were developed to augment the information yielded by those procedures whose purpose was primarily the generation of quantitative data. The qualitative and quantitative material was studied together to explore Freud's distinction between libidinal types, which might be implicated in differences in cultural (e.g., school) achievement. Results are discussed in relation to research, assessment, and educational issues.
Diskriminierende Begriffe und Wissensordnungen im Bildarchiv
Creators: name: Lampe, Moritz
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Kunstgeschichte
subject: Fotografie
subject: Bilddatenbank
subject: Archiv
subject: Inhaltserschließung
subject: Normdateien
subject: Klassifikationen
subject: Iconclass
subject: Dekolonialisierung
subject: 020 Bibliotheks- und Informationswissenschaften

description: Durch freitextliche Benennungen und Normdateien wie Thesauri und Klassifikationen üben kunsthistorische Fotosammlungen und Bilddatenbanken eine institutionelle Deutungshoheit über die von ihnen gesammelten, verwahrten und erschlossenen Dokumente aus. Dadurch können sie aktiv zur Naturalisierung und Normalisierung von problematischen Fremdbildern, Konzepten und Zuschreibungen beitragen. Dieses Machtpotenzial der wissenschaftlichen Katalogisierungs- und Erschließungsarbeit in analogen und digitalen Bildarchiven analysiert die vorliegende Studie aus theoretischer und praktischer Perspektive. Im Anschluss daran werden Lösungsansätze für den institutionellen Umgang mit dieser Problematik diskutiert.
Probing the Dust and Gas in the Transitional Disk of CS Cha with Spitzer
Creators: name: Espaillat, Catherine
name: Calvet, Nuria
name: D'Alessio, Paola
name: Bergin, Edwin
name: Hartmann, Lee
name: Watson, Dan
name: Furlan, Elise
name: Najita, Joan
name: Forrest, William
name: McClure, Melissa
name: Sargent, Ben
name: Bohac, Chris
name: Harrold, Samuel T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Here we present the Spitzer IRS spectrum of CS Cha, a member of the ~2 Myr old Chamaeleon star-forming region, which reveals an optically thick circumstellar disk truncated at ~43 AU, the largest hole modeled in a transitional disk to date. Within this inner hole, ~5x10^-5 lunar masses of dust are located in a small optically thin inner region which extends from 0.1 to 1 AU. In addition, the disk of CS Cha has bigger grain sizes and more settling than the previously modeled transitional disks DM Tau, GM Aur, and CoKu Tau/4, suggesting that CS Cha is in a more advanced state of dust evolution. The Spitzer IRS spectrum also shows [Ne II] 12.81 micron fine-structure emission with a luminosity of 1.3x10^29 ergs s^-1, indicating that optically thin gas is present in this ~43 AU hole, in agreement with H_alpha measurements and a UV excess which indicate that CS Cha is still accreting 1.2x10^-8 M_sun yr^-1. We do not find a correlation of the [Ne II] flux with L_X, however, there is a possible correlation with mass accretion rate, which if confirmed would suggest that EUV fluxes due to accretion are the main agent for formation of the [Ne II] line.
description: accepted to ApJ Letters
The eclipsing binary systems with $δ$ Scuti component. I. KIC 10661783
Creators: name: Miszuda, A.
name: Szewczuk, W.
name: Daszyńska-Daszkiewicz, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a comprehensive study of the eclipsing binary system KIC 10661783. The analysis of the whole Kepler light curve, corrected for the binary effects, reveals a rich oscillation spectrum with 590 significant frequency peaks, 207 of which are independent. In addition to typical $δ$ Sct frequencies, we find small-amplitude signals in the low-frequency range that, most probably, are a manifestation of gravity-mode pulsations. We perform binary-evolution computations for this system in order to find an acceptable model describing its current stage. Our models show that the binary KIC 10661783 was formed by a rapid, almost conservative, mass transfer that heavily affected the evolution of both components in the past. One of the most important effects of binary evolution is the enormous enrichment of the outer layers of the main component with helium. This fact profoundly influences the pulsational properties of $δ$ Scuti star models. For the first time, we demonstrate the effect of binary evolution on pulsational instability. We construct pulsational models of the main component in order to account for the mode instability of the observed frequencies. Whereas the single-star evolution model is pulsational stable in the whole frequency range, its binary-evolution counterpart has unstable modes, both, in high and low-frequency range. However, to obtain instability in almost a whole range of the observed frequencies, the modification of the mean opacity at the depth corresponding to temperatures log T = 4.69 K and log T = 5.06 K was necessary.
ABDURAUF FITRATNING MA'NAVIY, AXLOQIY VA TARBIYAVIY QARASHLARI
Creators: name: Rustamov. R. R., TATU Samarqand filiali Kompyuter Injiniring fakulteti KI 23-03 guruh talabasi
name: Ilmiy rahbar:  X.U.Samatov
Publisher: name: Zenodo
Year: 2023

description: Abdurauf  Fitrat  Turkiston  jadidchiligining  rivojida  muhim  rol o‘ynagan hamda o‘z asarlari bilan ushbu harakat g‘oyalarining yoyilishiga juda katta  hissa  qo‘shgani,  Fitratning  diniy  islohotchilik  yo‘nalishidagi faoliyati,.Abdurauf  Fitratning  “Oila”  Asaridagi  pedagogik  qarashlari  mazmuni, farzand  tarbiyasi,oilaning  jamiyatdagi  o’rni,  ma’naviy -axloqiy  tarbiyaning insonlar komilligiga ta’siri xususida so’z yurutilgan.
Chiral Equivariant Cohomology III
Creators: name: Lian, Bong H.
name: Linshaw, Andrew R.
name: Song, Bailin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: This is the third of a series of papers on a new equivariant cohomology that takes values in a vertex algebra, and contains and generalizes the classical equivariant cohomology of a manifold with a Lie group action a la H. Cartan. In this paper, we compute this cohomology for spheres and show that for any simple connected group G, there is a sphere with infinitely many actions of G which have distinct chiral equivariant cohomology, but identical classical equivariant cohomology. Unlike the classical case, the description of the chiral equivariant cohomology of spheres requires a substantial amount of new structural theory, which we fully develop in this paper. This includes a quasi-conformal structure, equivariant homotopy invariance, and the values of this cohomology on homogeneous spaces. These results rely on crucial features of the underlying vertex algebra valued complex that have no classical analogues.
description: Final version
Mutation rate dynamics reflect ecological change in an emerging zoonotic pathogen.
Creators: name: Murray, Gemma
name: Balmer, Andrew
name: Herbert, Josephine
name: Hadijirin, Nazreen F
name: Kemp, Caroline L
name: Matuszewska, Marta
name: Bruchmann, Sebastian
name: Hossain, AS Md Mukarram
name: Gottschalk, Marcelo
name: Tucker, Alexander
name: Miller, Eric
name: Weinert, Lucy
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021

description: Mutation rates vary both within and between bacterial species, and understanding what drives this variation is essential for understanding the evolutionary dynamics of bacterial populations. In this study, we investigate two factors that are predicted to influence the mutation rate: ecology and genome size. We conducted mutation accumulation experiments on eight strains of the emerging zoonotic pathogen Streptococcus suis. Natural variation within this species allows us to compare tonsil carriage and invasive disease isolates, from both more and less pathogenic populations, with a wide range of genome sizes. We find that invasive disease isolates have repeatedly evolved mutation rates that are higher than those of closely related carriage isolates, regardless of variation in genome size. Independent of this variation in overall rate, we also observe a stronger bias towards G/C to A/T mutations in isolates from more pathogenic populations, whose genomes tend to be smaller and more AT-rich. Our results suggest that ecology is a stronger correlate of mutation rate than genome size over these timescales, and that transitions to invasive disease are consistently accompanied by rapid increases in mutation rate. These results shed light on the impact that ecology can have on the adaptive potential of bacterial pathogens.
Slip-Based Autonomous ZUPT through Gaussian Process to Improve Planetary Rover Localization
Creators: name: Kilic, Cagri
name: Ohi, Nicholas
name: Gu, Yu
name: Gross, Jason N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The zero-velocity update (ZUPT) algorithm provides valuable state information to maintain the inertial navigation system (INS) reliability when stationary conditions are satisfied. Employing ZUPT along with leveraging non-holonomic constraints can greatly benefit wheeled mobile robot dead-reckoning localization accuracy. However, determining how often they should be employed requires consideration to balance localization accuracy and traversal rate for planetary rovers. To address this, we investigate when to autonomously initiate stops to improve wheel-inertial odometry (WIO) localization performance with ZUPT. To do this, we propose a 3D dead-reckoning approach that predicts wheel slippage while the rover is in motion and forecasts the appropriate time to stop without changing any rover hardware or major rover operations. We validate with field tests that our approach is viable on different terrain types and achieves a 3D localization accuracy of more than 97% over 650 m drives on rough terrain.
description: 8 pages, 6 figures, 2 tables