cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Periodic attractors of random truncator maps
Creators: name: Theodosopoulos, Ted
name: Boyer, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10; 82C20; 60K35

description: This paper introduces the \textit{truncator} map as a dynamical system on the space of configurations of an interacting particle system. We represent the symbolic dynamics generated by this system as a non-commutative algebra and classify its periodic orbits using properties of endomorphisms of the resulting algebraic structure. A stochastic model is constructed on these endomorphisms, which leads to the classification of the distribution of periodic orbits for random truncator maps. This framework is applied to investigate the periodic transitions of Bornholdt's spin market model.
description: 8 pages, presented at APFA5
Systematics in the X-ray Cluster Mass Estimators
Creators: name: Rasia, E.
name: Ettori, S.
name: Moscardini, L.
name: Mazzotta, P.
name: Borgani, S.
name: Dolag, K.
name: Tormen, G.
name: Cheng, L. M.
name: Diaferio, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the systematics affecting the X-ray mass estimators applied to a set of five simulated galaxy clusters. They have been processed through the X-ray Map Simulator, X-MAS, to provide Chandra-like long exposures that are analyzed to reconstruct the gas temperature, density, and mass profiles used as input. We find that at R_2500 the mass profile obtained via a direct application of the hydrostatic equilibrium equation is consistent within 1 sigma with the actual mass; although we notice this estimator shows high statistical errors due to high level of Chandra background. Instead, the poorness of the beta-model in describing the gas density profile makes the evaluated masses to be underestimated by \sim 40 per cent with respect to the true mass, both with an isothermal and a polytropic temperature profile. We also test ways to recover the mass by adopting an analytic mass model, such as those proposed by Navarro et al. (1997) and Rasia et al. (2004), and fitting the temperature profile expected from the hydrostatic equilibrium equation to the observed one. These methods and the one of the hydrostatic equilibrium equation provide a more robust mass estimation than the ones based on the beta-model. In the present work the main limitation for a precise mass reconstruction is to ascribe to the relatively high level of the background chosen to reproduce the Chandra one. After artificially reducing it by a factor of 100, we find that the estimated mass significantly underestimates the true mass profiles. This is manly due (i) to the neglected contribution of the gas bulk motions to the total energy budget and (ii) to the bias towards lower values of the X-ray temperature measurements because of the complex thermal structure of the emitting plasma.
description: submitted to MNRAS, 12 pages
Fe VII emission lines in the wavelength range 193-197 Å
Creators: name: Young, Peter R.
name: Ryabtsev, Alexander
name: Landi, Enrico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The identifications of Fe VII emission lines in the wavelength range 193-197 Å are discussed in the light of new measurements of laboratory spectra and atomic data calculations. This region is of importance to studies of solar spectra from the EUV Imaging Spectrometer (EIS) on board the Hinode spacecraft, which has its peak sensitivity at these wavelengths. Ten lines are measured, arising from seven fine structure levels in the $3p^53d^3$ configuration. Two lines have not previously been reported and lead to new experimental energies for the $(a^2D)^3F_{2,3}$ levels. Updated experimental energies are obtained for the remaining levels. The new atomic model is used to compute theoretical values for the two density diagnostic ratios $λ$196.21/$λ$195.39 and $λ$196.21/$λ$196.06, and densities are derived from EIS spectra of coronal loop footpoints.
description: Accepted by ApJ; 10 pages; 4 figures
A central limit theorem for stochastic recursive sequences of topical operators
Creators: name: Merlet, Glenn
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 93C65, 60F05 (Primary); 90B, 93B25, 60J10 (Secondary)

description: Let $(A_n)_{n\in\mathbb{N}}$ be a stationary sequence of topical (i.e., isotone and additively homogeneous) operators. Let $x(n,x_0)$ be defined by $x(0,x_0)=x_0$ and $x(n+1,x_0)=A_nx(n,x_0)$. It can model a wide range of systems including train or queuing networks, job-shop, timed digital circuits or parallel processing systems. When $(A_n)_{n\in\mathbb{N}}$ has the memory loss property, $(x(n,x_0))_{n\in\mathbb{N}}$ satisfies a strong law of large numbers. We show that it also satisfies the CLT if $(A_n)_{n\in \mathbb{N}}$ fulfills the same mixing and integrability assumptions that ensure the CLT for a sum of real variables in the results by P. Billingsley and I. Ibragimov.
description: Published at http://dx.doi.org/10.1214/105051607000000168 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682). II. The Spectroscopic Binary Population
Creators: name: Geller, Aaron M.
name: Mathieu, Robert D.
name: Latham, David W.
name: Pollack, Maxwell
name: Torres, Guillermo
name: Leiner, Emily M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present and analyse 120 spectroscopic binary and triple cluster members of the old (4 Gyr) open cluster M67 (NGC 2682). As a cornerstone of stellar astrophysics, M67 is a key cluster in the WIYN Open Cluster Study (WOCS); radial-velocity (RV) observations of M67 are ongoing and extend back over 45 years, incorporating data from seven different telescopes, and allowing us to detect binaries with orbital periods
description: Accepted for publication in AJ; 13 figures, 7 tables
Non-Markovian decoherence of localized nanotube excitons by acoustic phonons
Creators: name: Galland, Christophe
name: Högele, Alexander
name: Türeci, Hakan E.
name: Imamoğlu, Ataç
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate that electron-phonon interaction in quantum dots embedded in one-dimensional systems leads to pronounced, non-Markovian decoherence of optical transitions. The experiments we present focus on the lineshape of photoluminescence from low-temperature axially localized carbon nanotube excitons. The independent boson model that we use to model the phonon interactions reproduces with very high accuracy the broad and asymmetric emission lines and the weak red-detuned radial breathing mode replicas observed in the experiments. The intrinsic phonon-induced pure-dephasing of the zero-phonon line is two orders of magnitude larger than the lifetime broadening and is a hallmark of the reduced dimensionality of the phonon bath. The non-Markovian nature of this decoherence mechanism may have adverse consequences for applications of one-dimensional systems in quantum information processing.
description: 4 pages, 3 figures
Die Wiedervereinigung zwischen der Evangelischen Kirche in Deutschland (EKD) und dem Bund der evangelischen Kirchen in der DDR (BEK) in den Jahren 1990/1991
Creators: name: Noack, Axel
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 69 Nr. 4 (2020): Ökumenische Rundschau, Band 69, Heft 4
Assessing the contagiousness of mass shootings with nonparametric Hawkes processes
Creators: name: Boyd, Peter
name: Molyneux, James
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Gun violence and mass shootings are high-profile epidemiological issues facing the United States with questions regarding their contagiousness gaining prevalence in news media. Through the use of nonparametric Hawkes processes, we examine the evidence for the existence of contagiousness within a catalog of mass shootings and highlight the broader benefits of using such nonparametric point process models in modeling the occurrence of such events.
description: 28 pages, 15 figures
Observations of Energized Electrons in the Martian Magnetosheath
Creators: name: Horaites, K.
name: Andersson, L.
name: Schwartz, S. J.
name: Xu, S.
name: Mitchell, D. L.
name: Mazelle, C.
name: Halekas, J.
name: Gruesbeck, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: This observational study demonstrates that the magnitude and location of energization of electrons in the Martian magnetosheath is more complex than previous studies suggest. Electrons in Mars's magnetosheath originate in the solar wind and are accelerated by an electric field when they cross the bow shock. Assuming that this acceleration is localized solely to the shock, the field-aligned electron distributions in the sheath are expected to be highly asymmetric. However, such an asymmetry is not observed in this study. Based on the analysis here, it is suggested that an additional parallel acceleration takes place downstream of the Martian bow shock. This additional acceleration suppresses the expected asymmetry of the electron distribution. Consequently, along a flux tube in the magnetosheath that is tied on both ends to the bow shock the difference in energization between parallel and anti-parallel electrons is less than about 20 eV. Where this energization difference is expected to be maximal, we find the energization difference to be at most 25% of the predicted value.
description: 30 pages, 7 figures
On the Representation and Construction of Equitable Social Welfare Orders
Creators: name: Dubey, Ram Sewak
name: Laguzzi, Giorgio
name: Ruscitti, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: This paper examines the representation and explicit description of social welfare orders on infinite utility streams. It is assumed that the social welfare orders under investigation satisfy upper asymptotic Pareto and anonymity axioms. We prove that there exists no real-valued representation of such social welfare orders. In addition, we establish that the existence of a social welfare order satisfying the anonymity and upper asymptotic Pareto axioms implies the existence of a non-Ramsey set, which is a non-constructive object. Thus, we conclude that the social welfare orders under study do not admit explicit description.
Towards a Landau-Zener formula for an interacting Bose-Einstein condensate
Creators: name: Witthaut, D.
name: Graefe, E. M.
name: Korsch, H. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the Landau-Zener problem for a Bose-Einstein condensate in a linearly varying two-level system, for the full many-particle system as well and in the mean-field approximation. The many-particle problem can be solved approximately within an independent crossings approximation, which yields an explicit Landau-Zener formula.
description: RevTeX, 8 pages, 9 figures
Learning the Structure of Hyperedge Replacement Graph Grammars
Creators: name: Berrios, David Hyon
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: hyperedge replacement
context-free graph grammar
graph mining
Computer Science (0984)

description: With the abundance of large sets of relational data, methods for analyzing and providing a compact representation of the data prove more important, yet these tasks are more difficult than with data having attribute value pairs.  Graphs can be used to represent relational data, with nodes representing entities, and edges between nodes representing relationships between entities. To represent and analyze relational data, we focus on languages of graphs generated by context-free graph grammars with hyperedge replacement.  Context-free graph grammars compactly represent sets of graphs. Given a set of graphs generated from an unknown context-free graph grammar, we can infer the productions of the original generating grammar.  Our algorithm finds the correct right hand side candidates of the original grammar, and preserves the locations of non-terminal edges in the original grammar.  We present the algorithm used to infer the productions, and perform experiments on both synthetic and real world datasets.
Effect of Stark shift on low-energy interference structure in strong-field ionization
Creators: name: Yang, Weifeng
name: Li, Jie
name: Jia, Wenbin
name: Zhang, Hongdan
name: Liu, Xiwang
name: Zhu, Ming
name: Song, Xiaohong
name: Chen, Jing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: An improved quantum trajectory Monte Carlo method involving the Stark shift of the initial state, Coulomb potential, and multielectron polarization-induced dipole potential is used to revisit the origin of the low-energy interference structure in the photoelectron momentum distribution of the xenon atom subjected to an intense laser field, and resolve the different contributions of these three effects. In addition to the well-studied radial finger-like interference structure, a ring-like interference structure induced by interference among electron wave packets emitted from multi-cycle time windows of the laser field is found in the low energy part of the photoelectron momentum spectrum. It is attributed to the combined effect of the Coulomb potential and Stark shift. Our finding provides new insight into the imaging of electron dynamics of atoms and molecules with intense laser fields.
Weak-strong uniqueness and energy-variational solutions for a class of viscoelastoplastic fluid models
Creators: name: Eiter, Thomas
name: Hopf, Katharina
name: Lasarzik, ##!Error: Attribute  Unknown!##
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Viscoelastic fluids
subject: viscoplasticity
subject: weak-strong uniqueness
subject: relative energy inequality
subject: nonsmooth potential
subject: vanishing stress diffusion
subject: 35K61
subject: 35Q35
subject: 35Q86
subject: 76A10
subject: 76D03

description: We study a model for a fluid showing viscoelastic and viscoplastic behavior, which describes the flow in terms of the fluid velocity and an internal stress. This stress tensor is transported via the Zaremba--Jaumann rate, and it is subject to two dissipation processes: one induced by a nonsmooth convex potential and one by stress diffusion. We show short-time existence of strong solutions as well as their uniqueness in a class of Leray--Hopf type weak solutions satisfying the tensorial component in the sense of an evolutionary variational inequality. The global-in-time existence of such generalized solutions has been established in a previous work. We further study the limit when stress diffusion vanishes. In this case, the above notion of generalized solutions is no longer suitable, and we introduce the concept of energy-variational solutions, which is based on an inequality for the relative energy. We derive general properties of energy-variational solutions and show their existence by passing to the non-diffusive limit in the relative energy inequality satisfied by generalized solutions for non-zero stress diffusion.
Investigation of the combined effect of polarization-mode dispersion and polarization-dependent loss on system performance
Creators: name: Jiao, Hua
Publisher: name: Maryland Shared Open Access Repository
Year: 2007
Subjects: Engineering, Electronics and Electrical (0544)
Optical fiber communication
optical fiber polarization
optical noise
optical receivers
Q-factor

description: Polarization effects such as polarization-mode dispersion (PMD) and polarization-dependent loss (PDL) cause a variety of impairments to optical fiber communication systems. PMD induces pulse distortions and depolarization of the signal that degrade system performance. PDL can cause initially unpolarized noise become partially polarized and thus increases the system performance variation. When combined together, they can produce surprising effects that cannot be predicted by their effects acting alone. ; In this dissertation, my colleagues and I derived a formula for the variance of the received electric current of a depolarized signal due to first-order PMD and partially polarized noise. From this formula and the formulae for the mean of the received electric current, we were able to calculate the system performance, e.g. the Q-factor due to the combined effect of PMD and PDL. We validated the formula by comparing Q-factors obtained from the theory, Monte Carlo simulations and experiments and found good agreements. We also found that the partially polarized noise can induce large system performance variation when the signal is depolarized. This finding is the same as when the signal is polarized. However, the beating between the signal and the noise is totally different when the signal is polarized or depolarized. In systems where the signal is depolarized, the angle between the SOP of the signal and the polarized part of the noise varies as a function of time within each bit window, while the angle is constant in systems where the signal is polarized. As a result, the beating between the signal and the noise varies over time within each bit window when the signal is depolarized and this can cause complications in determining the clock time. ; In addition to the validation of the model, we also investigated the sensitivity of the Q-factor to the inherent measurement uncertainty of the pulse width of the signal, the OSNR, and the receiver filter bandwidths. This study is especially important to experimentalists and system designers to estimate the level of uncertainty of system performance in practical systems. Our model can be used in On-Off-Keyed systems where first-order PMD and PDL cause significant penalties.
Automatic detection of fish and tracking of movement for ecology
Creators: name: Lopez-Marcano, Sebastian
name: Jinks, Eric
name: Buelow, Christina
name: Brown, Christopher
name: Wang, Dadong
name: Kusy, Branislav
name: Ditria, Ellen
name: Connolly, Rod
Publisher: name: Zenodo
Year: 2021
Subjects: computer vision
connectivity
dispersal
object tracking
underwater video

description: Methods description of the GitHub repository automated-fish-tracking for the paper "Automatic detection of fish and tracking of movement for ecology". 
Der Konziliare Prozess für Gerechtigkeit, Frieden und Bewahrung der Schöpfung
Creators: name: Brown, Stephen Gilbert
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 69 Nr. 4 (2020): Ökumenische Rundschau, Band 69, Heft 4
title: Information Systems Freshmen Teaching: Case Experience from Day One
Creators: name: Pflanzl, Nicolas
name: Bergener, Katrin
name: Stein, Armin
name: Vossen, Gottfried
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2024
Subjects: subject: 004 Computer science
subject: 330 Economics

description: 1 INTRODUCTION ..... 4
2 BACKGROUND ..... 6
2.1 SKILL ACQUISITION ..... 6
2.2 IS EDUCATION AT THE UNIVERSITY OF MÜNSTER ..... 7
3 COURSE DESIGN ..... 9
3.1 HISTORICAL DEVELOPMENT ..... 9
3.2 CURRENT ITERATION: EXPERIENCE-ORIENTATION ..... 9
3.2.1 Objectives ..... 9
3.2.2 Structure ..... 10
3.2.3 Evaluation ..... 12
4 DISCUSSION ..... 15
5 CONCLUSION AND OUTLOOK ..... 18
Legitimation of applied knowledge: the creation of a Bachelor of Technology degree at BCIT
Creators: name: McArthur, Ann
Publisher: name: University of British Columbia
Year: 2009

description: This thesis documents and analyses a process whereby practice-based applied knowledge achieved formal legitimacy in British Columbia. The study is a historical case study representing a unique case, the creation of a Bachelor of Technology degree at the British Columbia Institute of Technology (BCIT). The central research question is: What were the external and internal factors that enabled Or constrained the legitimation of applied knowledge to baccalaureate status at BCIT? The study is situated within both a theoretical and comparative context. The theoretical framework recognises the changing base of knowledge through discussion of pure and applied knowledge, knowledge stratification and its overt expression in terms of educational credentials, and the demarcation of knowledge units. A comparative backdrop to the study, traces the legitimation of applied knowledge in the United Kingdom, Germany, Australia and Canada. Methods of investigation included: interviews with stakeholders representing government, the corporate sector, professional associations, and BCIT personnel, past and present; analysis of archival materials and contemporary policy documents; and, participant observation resulting from the author's intimate involvement with the process. The study concludes that this new level of legitimacy conferred on applied knowledge in British Columbia results from the convergence of factors both external and internal to BCIT, the integrative factor being "timing." Practice-based applied knowledge was elevated to baccalaureate status for the following reasons: the proposal for a Bachelor of Technology degree aligned with government's vision; government had confidence in BCIT as a degree granting institution; the political environment was "safe"; and, the approach was cost effective and accountable. Constraining factors pertained primarily to, the effects of degree granting on BCIT's valued diploma programs. Future research could investigate the impact of degree status on the diploma programs and on the overall culture of the institution.
Gaia pulsars and where to find them
Creators: name: Antoniadis, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: While the majority of massive stars have a stellar companion, most pulsars appear to be isolated. Taken at face value, this suggests that most massive binaries break apart due to strong natal kicks received in supernova explosions. However, the observed binary fraction can still be subject to strong selection effects, as monitoring of newly discovered pulsars is rarely carried out for long enough to conclusively rule out multiplicity. Here, we use the second Gaia Data Release (DR2) to search for companions to 1534 rotation-powered pulsars with positions known to better than 0.5 arcseconds. We find 22 matches to known pulsars, including one not reported elsewhere, and 8 new possible companions to young pulsars. We examine the photometric and kinematic properties of these systems and provide empirical relations for identifying Gaia sources with potential millisecond pulsar companions. Our results confirm that the observed multiplicity fraction is small. However, we show that the number of binaries below the sensitivity of Gaia and radio timing in our sample could still be significantly higher. We constrain the binary fraction of young pulsars to be $f_{\rm young}^{\rm true}\leq 5.3(8.3)\%$ under realistic(conservative) assumptions for the binary properties and current sensitivity thresholds. For massive stars ($\geq 10$ M$_{\odot}$) in particular, we find $f_{\rm OB}^{\rm true}\leq 3.7\%$ which sets a firm independent upper limit on the galactic neutron-star merger rate, $\leq 7.2\times 10^{-4}$ yr$^{-1}$. Ongoing and future projects such as the CHIME/pulsar program, MeerTime, HIRAX and ultimately the SKA, will significantly improve these constraints in the future.
description: Accepted for publication in MNRAS; comments are welcome
Two-soliton solution for the derivative nonlinear Schrödinger equation with nonvanishing boundary conditions
Creators: name: Chen, Xiang-Jun
name: Wang, Hui-Li
name: Lam, Wa Kun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: An explicit two-soliton solution for the derivative nonlinear Schrödinger equation with nonvanishing boundary conditions is derived, demonstrating details of interactions between two bright solitons, two dark solitons, as well as one bright soliton and one dark soliton. Shifts of soliton positions due to collisions are analytically obtained, which are irrespective of the bright or dark characters of the participating solitons.
description: 11 pages, 4 figures. Phys. Lett. A 2006 (in press)
Investigation of performance statistics in a high bit-rate terrestrial WDM system
Creators: name: Wen, Jiping
Publisher: name: Maryland Shared Open Access Repository
Year: 2007
Subjects: optical communication
performance statistics
polarization effects
fiber birefringence drift
linear crosstalk
patterning effect
Engineering, Electronics and Electrical (0544)

description: This dissertation presents experimental and theoretical studies of the long-term statistical distribution of the Q-factor, and the impact of polarization-dependent loss (PDL), fiber birefringence drift, linear crosstalk, and patterning effects in an emulated realistic terrestrial wavelength-division-multiplexing (WDM) system. The experiments were carried out in a 10 Gb/s WDM loop system with the return-to-zero (RZ) modulation format at three channel spacings. The simulations were based on D. Wang, et al.'s reduced Stokes transmission model, two pattern-dependent receiver models--P. Winzer, et al.'s accurate full time-domain model and G. Tudury, et al.'s simplified phenomenological model, and a newly developed pattern-dependent transmitter model. A procedure to provide a good interface between the reduced Stokes transmission model and Winzer, et al.'s full time-domain receiver model is also introduced. The accuracy and applicable range of the two patterndependent receiver models in evaluating performance statistics are investigated. Very good quantitative agreement between the experimental and simulation results based on Winzer, et al.'s receiver model combined with the new transmitter model show that at a channel power level of ?3.5 dBm, typical for a terrestrial WDM system, optical data transmission is in the linear regime and experiences insignificant pulse distortion due to polarization mode dispersion (PMD) effects up to a distance of 1800 km. At channel spacings of 100 GHz or larger, PDL and fiber drift are the dominant contributors to the Q-factor fluctuations. At a channel spacing of 50 GHz, inter-channel linear crosstalk begins to degrade the system mean performance and contributes to the performance fluctuations. My study also shows that, at this relatively high optical signal-to-noise ratio (OSNR) level (about 16 dB), the effects of data pattern-dependence from both the transmitter and receiver can noticeably impact the statistics of the system performance. In contrast, at low OSNR levels, the system performance is dominated by the amplified spontaneous emission (ASE) noise, and the effects of data pattern-dependence are negligible. Therefore, careful characterization and accurate modelling of the pattern dependence of both transmitter and receiver are critical for correct evaluation of the system performance statistics over a wide range of OSNR values.
Additional file 2: of Clinical outcomes in idursulfase-treated patients with mucopolysaccharidosis type II: 3-year data from the hunter outcome survey (HOS)
Creators: name: Muenzer, Joseph
name: Giugliani, Roberto
name: Scarpa, Maurizio
name: Tylki-SzymaĹSka, Anna
name: Jego, Virginie
name: Beck, Michael
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: Plant Biology
subject: FOS: Biological sciences

description: Table S2. Median urinary glycosaminoglycan (uGAG) levels and median changes from baseline in uGAG levels in patients with data available at consecutive timepoints (year 1, year 2 and year 3 of treatment with idursulfase) (DOCX 22 kb)
Interactive Rendering of Heterogeneous Translucent Objects
Creators: name: Shopf, Jeremy Michael
Publisher: name: Maryland Shared Open Access Repository
Year: 2007
Subjects: Computer Science (0984)
Computer graphics
appearance modeling
translucency
subsurface scattering

description: Subsurface scattering is a subtle and often overlooked phenomena responsible for the translucent effects seen in many materials due to the interaction of light with the medium. We describe an algorithm for approximating the appearance of translucent objects with heterogeneous material properties. More specifically, object materials that exhibit translucency and volumetric texture variations. By estimating the physical behavior of light in a participating medium while taking into account the salient perceptual features, we generate perceptually acceptable images. An analysis in terms of performance and rendered images is also performed. Objects rendered using our method are modeled as a polygonal mesh with a scalar volume describing the spatial density of the material. The interactive performance achieved coupled with the polygonal representation makes this algorithm well-suited for use in real-time computer graphics applications such as video games.
$S$-duality in Vafa-Witten theory for non-simply laced gauge groups
Creators: name: Wu, Siye
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Vafa-Witten theory is a twisted N=4 supersymmetric gauge theory whose partition functions are the generating functions of the Euler number of instanton moduli spaces. In this paper, we recall quantum gauge theory with discrete electric and magnetic fluxes and review the main results of Vafa-Witten theory when the gauge group is simply laced. Based on the transformations of theta functions and their appearance in the blow-up formulae, we propose explicit transformations of the partition functions under the Hecke group when the gauge group is non-simply laced. We provide various evidences and consistency checks.
description: 14 pages
Efficient, stabilized two-qubit gates on a trapped-ion quantum computer
Creators: name: Blümel, Reinhold
name: Grzesiak, Nikodem
name: Nguyen, Nhung H.
name: Green, Alaina M.
name: Li, Ming
name: Maksymov, Andrii
name: Linke, Norbert M.
name: Nam, Yunseong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum computing is currently limited by the cost of two-qubit entangling operations. In order to scale up quantum processors and achieve a quantum advantage, it is crucial to economize on the power requirement of two-qubit gates, make them robust to drift in experimental parameters, and shorten the gate times. In this paper, we present two methods, one exact and one approximate, to construct optimal pulses for entangling gates on a pair of ions within a trapped ion chain, one of the leading quantum computing architectures. Our methods are direct, non-iterative, and linear, and can construct gate-steering pulses requiring less power than the standard method by more than an order of magnitude in some parameter regimes. The power savings may generally be traded for reduced gate time and greater qubit connectivity. Additionally, our methods provide increased robustness to mode drift. We illustrate these trade-offs on a trapped-ion quantum computer.
A general solution to the E-B mixing problem
Creators: name: Smith, Kendrick M.
name: Zaldarriaga, Matias
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive a general ansatz for optimizing pseudo-C_l estimators used to measure CMB anisotropy power spectra, and apply it to the recently-proposed pure pseudo-C_l formalism, to obtain an estimator which achieves near-optimal B-mode power spectrum errors for any specified noise distribution while minimizing leakage from ambiguous modes. Our technique should be relevant for upcoming CMB polarization experiments searching for B-mode polarization. We compare our technique both to the theoretical limits based on a full Fisher matrix calculation and to the standard pseudo-C_l technique. We demonstrate it by applying it to a fiducial survey with realistic inhomogeneous noise, complex boundaries, point source masking, and noise level comparable to what is expected for next generation experiments (~5.75 uK-arcmin). For such an experiment our technique could improve the constraints on the amplitude of a gravity wave background by over a factor of ten compared to what could be obtained using ordinary pseudo-C_l, coming quite close to saturating the theoretical limit. Constraints on the amplitude of the lensing B-modes are improved by about a factor of 3.
description: 25 pages, 10 figures, submitted to PRD
BАDIIY ASRDA BOLА RUHIYATI VA TАFАKKURINING NАMOYON BO'LISH TАMOYILLАRI
Creators: name: Mavlyanova, Shahnoza
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada bаdiiy аsаr  va undа bola ruhiyati, tafakkuri jаmiyаt hаyoti, uning tаqdir yo‘li vа qismаti o‘z tаsvirini topаdi. Bola ruhiyati  bаdiiy аsаrdа hаyotimizdа sodir bo‘lib o‘tgаn yoki bo‘lishi mumkin bo‘lgаn voqeа-hodisаlаr muаllif tomonidаn o‘quvchi-kitobxongа bаdiiylik qonuniyаtlаrigа аsoslаnib yetkаzilаr ekаn, mаzkur bаdiiylik qonuniyаtlаri turli dаvrlаrdа sаyqаllаnib, аn’аnаviylik vа novаtorlik orаsidа muntаzаm shаkllаnishdа asoslangan.
Transactive Energy Framework for Optimal Energy Management of Multi-Carrier Energy Hubs Under Local Electrical, Thermal and Cooling Market Constraints
Creators: name: Khorasany, Mohsen
name: Razzaghi, Reza
name: Mohammadi-Ivatloo, Behnam
name: Najafi-Ghalelou, Afshin
Publisher: name: Monash University
Year: 2021
Subjects: subject: 90608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 90607 Power and Energy Systems Engineering (excl. Renewable Power)
subject: 90699 Electrical and Electronic Engineering not elsewhere classified

description: The interactions among the multi-carrier energy system provide the opportunity to achieve affordable and clean energy by using energy resources in a more efficient way. In this paper, a transactive energy (TE) framework for optimal energy management of multiple energy hubs (EHs) is proposed. Each EH is a multicarrier energy system performing day-ahead energy management to schedule its electrical, thermal, and cooling demand profiles and manages its internal energy resources to reduce total energy expenses and the emission level of CO2.
New Brown Dwarf Disks in the TW Hydrae Association
Creators: name: Riaz, B.
name: Gizis, J. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In our analysis of {\it Spitzer}/IRS archival data on the stellar and sub-stellar members of the TW Hydrae Association (TWA), we have discovered two new brown dwarf disks: a flat optically thick disk around SSSPM J1102-3431 (SSSPM 1102), and a transition disk around 2MASS J1139511-315921 (2M1139). The disk structure for SSSPM 1102 is found to be very similar to the known brown dwarf disk 2MASSW J1207334-393254 (2M1207), with excess emission observed at wavelengths as short as 5 $\micron$. 2M1139 shows no excess emission shortward of $\sim$20 $\micron$, but flares up at longer wavelengths, and is the first transition disk detected among the sub-stellar members of TWA. We also report on the {\it Spitzer}/70 $\micron$ observations, and the presence of a weak {\it absorption} 10 $\micron$ silicate feature for 2M1207. The absorption can be attributed to a close to edge-on disk at a 75$\degr$ inclination. The 10 $\micron$ spectrum for 2M1207 shows crystalline forsterite features, with a peak in absorption near 11.3 $\micron$. No silicate absorption/emission is observed towards SSSPM 1102. While only 6 out of 25 stellar members show excess emission at these mid-infrared wavelengths, {\it all} of the TWA brown dwarfs that have been observed so far with {\it Spitzer} show signs of disks around them, resulting in a disk fraction of at least 60%. This is a considerable fraction at a relatively older age of $\sim$10 Myr. A comparison with younger clusters indicates that by the age of the TWA ($\sim$10 Myr), the disk fraction for brown dwarfs has not decreased, whereas it drops by a factor of $\sim$2 for the higher mass stars. This suggests longer disk decay time scales for brown dwarfs compared to higher mass stars.
description: 23 pages, 6 figures. Accepted in ApJ
Tail behavior of stopped Lévy processes with Markov modulation
Creators: name: Beare, Brendan K.
name: Seo, Won-Ki
name: Toda, Alexis Akira
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Theoretical Economics (econ.TH)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: This article concerns the tail probabilities of a light-tailed Markov-modulated Lévy process stopped at a state-dependent Poisson rate. The tails are shown to decay exponentially at rates given by the unique positive and negative roots of the spectral abscissa of a certain matrix-valued function. We illustrate the use of our results with an application to the stationary distribution of wealth in a simple economic model in which agents with constant absolute risk aversion are subject to random mortality and income fluctuation.
Independent Component Analysis of Dynamic Contrast Enhanced Breast Magnetic Resonance Imaging
Creators: name: Wang, Yi
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Engineering, Electronics and Electrical (0544)

description: Magnetic resonance mammography (MRM) has been used in clinical diagnosis over the last few decades, especially among high-risk community. There is a critical need for developing a real-time computer-aided diagnosis (CAD) system for the efficient diagnosis of breast cancer to improve the workflow of radiologists, limiting the number of clinical visits a patient makes before the final diagnosis is made. This thesis aims to develop such a CAD system that processes images obtained from dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) to aid the diagnosis of breast cancer, as it is known to differentiate between benign and malignant lesions. A DCE-MRI study involves injection of a contrast agent immediately prior to the image acquisitions. The presence of contrast agent within an imaging voxel would result in an increased signal that can be observed over the time course of the experiment. Different pathological characteristics of tissues present different localized dynamic responses. The independent component analysis (ICA) technique enables the extraction of spatial and temporal features from dynamic MRI data, where different signal responses are delineated, and areas with high temporal correlations with the extracted signal components are selectively visualized. Before ICA, principal component analysis (PCA) is used for dimension reduction purpose. Based on the first step, the pharmacokinetic analysis is then applied to retrieve pharmacokinetics parameters, which could be the direct indicators of tissues with different pathological features. The techniques are hoped to enhance radiologists' workflow and improve upon the detection and characterization of breast lesions in dynamic contrast enhanced study. A detailed discussion and exploration on the feasibility of aforementioned techniques as a CAD system for the breast cancer detection are also presented.
Proceedings of the 3rd Annual International Applied Category Theory Conference 2020
Creators: name: Spivak, David I.
name: Vicary, Jamie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: The third annual International Applied Category Theory Conference (ACT2020) was planned to take place at MIT in Cambridge, Massachusetts USA. However, the global COVID-19 pandemic made the prospect of holding a large in-person meeting impossible, and the event was thus held completely online. Holding the talks online had the new benefits of reducing carbon footprint, being inclusive of people from more parts of the world, and producing higher-quality video talks, which have been posted online for posterity. The ACT2020 contributions spanned a broad spectrum of application areas, including databases, dynamical systems, functional programming, game theory, lenses, neuroscience, probabilistic programming, natural language processing, quantum mechanics, and cyberphysical systems. Papers featured a broad range of categorical techniques. Papers in this Proceedings volume represents about half of the talks presented at ACT2020. Being included in the proceedings vs. not is not an indication of talk quality, but instead almost exclusively the choice of the authors, e.g. to present work already published elsewhere.
Improving Accuracy of Named Entity Recognition on Social Media Data
Creators: name: Murnane, William Charles
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: named entity recognition
social media
twitter

description: In recent years, social media outlets such as Twitter and Facebook have drawn attention from companies and researchers interested in detecting trends.  The informal nature of status updates from these services leads to a higher volume of updates, because each update takes little care to generate, but each update is usually short and noisy (misspellings, lack of punctuation, non-standard abbreviations and capitalization).  These shortcomings cause traditional Natural Language Processing (NLP) techniques to have substantially lower accuracy than is found with structured text such as newswire articles.  We present a system for improving the accuracy of one NLP technique, Named Entity Recognition or NER, on Twitter data by training a recognizer specifically for this type of data.  NER is the process of automatically recognizing which words are names of people, places, or organizations.  This trained model is compared to baseline entity detection rate with an off-the-shelf NER system.
AI is revolutionizing biomedical research, but are there any negatives?
Creators: name: Tang, Bor Luen
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2024
Subjects: Artificial Intelligence (AI)
large language models
data analysis
publication ethics
AIgiarism

description: EXCLI Journal; 23:Doc1226; ISSN 1611-2156
Ekué, Amélé Adamavi-Aho ... : Heimat (en)?
Creators: name: Niepmann, Kathleen
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 69 Nr. 3 (2020): Ökumenische Rundschau, Band 69, Heft 3
Elementary simulation of tethered Brownian motion
Creators: name: Beausang, John F.
name: Zurla, Chiara
name: Sullivan, Luke
name: Finzi, Laura
name: Nelson, Philip C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We describe a simple numerical simulation, suitable for an undergraduate project (or graduate problem set), of the Brownian motion of a particle in a Hooke-law potential well. Understanding this physical situation is a practical necessity in many experimental contexts, for instance in single molecule biophysics; and its simulation helps the student to appreciate the dynamical character of thermal equilibrium. We show that the simulation succeeds in capturing behavior seen in experimental data on tethered particle motion.
description: Submitted to American Journal of Physics
Hubble Space Telescope Observations of [O~III] Emission in Nearby QSO2s: Physical Properties of the Ionised Outflows
Creators: name: Falcao, Anna Trindade
name: Kraemer, S. B.
name: Fischer, T. C.
name: Crenshaw, D. M.
name: Revalski, M.
name: Schmitt, H. R.
name: Vestergaard, M.
name: Elvis, M.
name: Gaskell, C. M.
name: Hamann, F.
name: Ho, L. C.
name: Hutchings, J.
name: Mushotzky, R.
name: Netzer, H.
name: Storchi-Bergmann, T.
name: Turner, T. J.
name: Ward, M. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use Hubble Space Telescope (HST)/ Space Telescope Imaging Spectrograph (STIS) long-slit G430M and G750M spectra to analyse the extended [O~III] 5007A emission in a sample of twelve nearby (z < 0.12) luminous (L_bol > 1.6 x 10^45 erg s^-1) QSO2s. The purpose of the study is to determine the properties of the mass outflows of ionised gas and their role in AGN feedback. We measure fluxes and velocities as functions of radial distances. Using Cloudy models and ionising luminosities derived from [O~III] 5007A, we are able to estimate the densities for the emission-line gas. From these results, we derive masses of [O~III]-emitting gas, mass outflow rates, kinetic energies, kinetic luminosities, momenta and momentum flow rates as a function of radial distance for each of the targets. For the sample, masses are several times 10^3 - 10^7 solar masses and peak outflow rates are 9.3 x 10^-3 Msun/yr to 10.3 Msun/yr. The peak kinetic luminosities are 3.4 x 10^-8 to 4.9 x 10^-4 of the bolometric luminosity, which does not approach the 5.0 x 10^-3 - 5.0 x 10^-2 range required by some models for efficient feedback. For Mrk 34, which has the largest kinetic luminosity of our sample, in order to produce efficient feedback there would have to be 10 times more [O~III]-emitting gas than we detected at its position of maximum kinetic luminosity. Three targets show extended [O~III] emission, but compact outflow regions. This may be due to different mass profiles or different evolutionary histories.
description: 14 pages, 11 Figures, accepted for publication in the MNRAS