cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Excitation of Spin-Orbit Misalignments in Stellar Binaries with Circumbinary Disks: Application to DI Herculis
Creators: name: Anderson, Kassandra R.
name: Lai, Dong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The large spin-orbit misalignments in the DI Herculis stellar binary system have resolved the decades-long puzzle of the anomalously slow apsidal precession rate, but raise new questions regarding the origin of the obliquities. This paper investigates obliquity evolution in stellar binaries hosting modestly-inclined circumbinary disks. As the disk and binary axes undergo mutual precession, each oblate star experiences a torque from its companion star, so that the spin and orbital axes undergo mutual precession. As the disk loses mass through a combination of winds and accretion, the system may be captured into a high-obliquity Cassini state (a spin-orbit resonance). The final obliquity depends on the details of the disk dispersal. We construct a simple disk model to emulate disk dispersal due to viscous accretion and photoevaporation, and identify the necessary disk properties for producing the observed obliquities in DI Herculis. The disk must be massive (at least $10 \%$ of the binary mass). If accretion onto the binary is suppressed, the observed high stellar obliquities are reproduced with a binary-disk inclination of $\sim 5^\circ - 10^\circ$, but if substantial accretion occurs, the inclination must be larger, $\sim 20^\circ - 30^\circ$. If moderate accretion occurs, initially the disk must lose its mass slowly, but eventually lose its remaining mass abruptly, analogous to the observed two-timescale behavior for disks around T-Tauri stars. The spin feedback on the binary orbit causes the binary-disk inclination to decay as the obliquity evolves, a feature that is absent from the standard Cassini state treatment.
description: 13 pages, 6 figures, accepted for publication in ApJ
Analysis of Saturation Flow at Signalized Intersections
Creators: name: Agent, Kenneth R.
name: Crabtree, Joseph D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: The accuracy of saturation flow values is of prime importance when determining the capacity of signalized intersections. The objective of this study was to collect a large sample of field measurements so that reliable saturation flow values could be obtained and the factors affecting saturation flow could be identified.  The results identified several factors which had significant influence on saturation flow. A formula was recommended for use in estimating an appropriate saturation flow value for a specific lane on an approach to an intersection. Adjustment factors were applied to a "base'' saturation flow value. Adjustments were developed for the following factors; location in city, city population, vehicle type and turning maneuver, gradient, width of lane, turning radius (jar right-turning vehicles), pedestrian activity, type of lane, speed limit, and light condition.
Zum Beispiel Ökumene in Berlin
Creators: name: Schimpf, Klaus
name: Krüger-Day, Helga
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 34 Nr. 3 (1985): Ökumenische Rundschau, Band 34, Heft 3
Single versus optional topics in ESL writing tests
Creators: name: Sŏ, Nam-Wŏn
Publisher: name: University of British Columbia
Year: 2009

description: There is a growing number of ESL learners taking writing examinations to enter English universities every year. The purpose of these writing tests is to measure general writing competence rather than content knowledge. To address this purpose, some tests offer ESL students multiple topics to choose from while others include only one topic. To date, research on the effects of topics on student writing has been primarily focused on performance, but no hard evidence has been provided in support of one test condition over the other. Moreover, there is less research investigating the process of writing under the two testing conditions. Research on the writing process in a timed-test condition is an important area because it can provide background information about how ESL students reach certain scores. The present study used a qualitative approach with 22 ESL students to explore how they chose and/ or wrote under multiple topic versus single topic test conditions and how they felt about each test condition. Video tapes of the testing sessions and transcripts of the participants' interviews were analyzed to address the research questions, which focused on exploring the time needed for prewriting, the topic selection process, the criteria for topic choice, and attitudes toward each test condition. The findings suggest that while most participants spent more time prewriting for the multiple topic test, they did not consider this a waste of time. They believed that their use of time was productive in that it allowed them to take a great leap forward. Under the multiple topic test condition, the ESL students appeared to read all the topics before choosing. Topic familiarity was the most popular criterion they referred to in making a choice. The majority of the ESL students in this study stated that they preferred to have options in a real test situation. These results suggest that offering options in a timed-test situation may help many ESL learners feel more comfortable about taking a writing test, and this comfort may in turn help them display a good representation of their general writing ability.
Snow-Melting System, 9th Street and I 64, Louisville
Creators: name: Azevedo, Wm. Vernon
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: The 9th Street - I 64 interchange in Louisville was equipped with an automated electrical heating system for snow and ice removal. The system is capable of maintaining a clear and safe passageway. This report summarizes the performance of the heating system and describes the factors that will influence future use of this or other nonconventional methods of snow and ice removal.
title: Child Restraint Usage in Kentucky
title: (Pre-Legislation)
titleType: Subtitle
Creators: name: Agent, Kenneth R.
name: Crabtree, Joseph D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: In an attempt to increase child restraint usage, a law was enacted by the 1982 Kentucky Legislature requiring use of child restraints for children forty inches or less in height. To evaluate the effectiveness of this law, a usage survey had to be completed before the law became effective. Objectives of this study were to determine statewide child restraint usage and statistics relating to improper usage. Seatbelt usage of drivers was also analyzed.  A statewide child restraint usage rate of 14.4 percent was obtained. Only 44 percent of restraints were coded as used properly. Several factors, such as population, age of child, and driver restraint usage, were related to child restraint usage. The specific restraint brand was noted and a few, such as the Strolee and Bobby Mac, were the most common. The major overall improper usage was failure to tether the restraint as required. A statewide driver restraint usage rate of 4.2 percent was found.
End benches scattered light modeling and subtraction in Advanced Virgo
Creators: name: Was, Michal
name: Gouaty, Romain
name: Bonnand, Romain
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Advanced Virgo end benches were a significant source of scattered light noise during the third observing run that lasted from April 1 2019 until March 27 2020. We describe how that noise could be subtracted using auxiliary channels during the online strain data reconstruction. We model in detail the scattered light noise coupling and demonstrate that further noise subtraction can be achieved. We also show that the fitted model parameters can be used to optically characterized the interferometer and in particular provide a novel way of establishing an absolute calibration of the detector strain data.
description: 12 pages, 5 figures, Accepted in Class. Quantum Grav
Systematic study of three-nucleon force effects in the cross section of the deuteron-proton breakup at 130 MeV
Creators: name: Kistryn, St.
name: Stephan, E.
name: Biegun, A.
name: Bodek, K.
name: Deltuva, A.
name: Epelbaum, E.
name: Ermisch, K.
name: Gloeckle, W.
name: Golak, J.
name: Kalantar-Nayestanaki, N.
name: Kamada, H.
name: Kis, M.
name: Klos, B.
name: Kozela, A.
name: Kuros-Zolnierczuk, J.
name: Mahjour-Shafiei, M.
name: Meissner, U. -G.
name: Micherdzinska, A.
name: Nogga, A.
name: Sauer, P. U.
name: Skibinski, R.
name: Sworst, R.
name: Witala, H.
name: Zejma, J.
name: Zipper, W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV are presented for 72 kinematically complete configurations. The data cover a large region of the available phase space, divided into a systematic grid of kinematical variables. They are compared with theoretical predictions, in which the full dynamics of the three-nucleon (3N) system is obtained in three different ways: realistic nucleon-nucleon (NN) potentials are combined with model 3N forces (3NF's) or with an effective 3NF resulting from explicit treatment of the Delta-isobar excitation. Alternatively, the chiral perturbation theory approach is used at the next-to-next-to-leading order with all relevant NN and 3N contributions taken into account. The generated dynamics is then applied to calculate cross-section values by rigorous solution of the 3N Faddeev equations. The comparison of the calculated cross sections with the experimental data shows a clear prefernce for the predictions in which the 3NF's are included. The majority of the experimental data points is well reproduced by the theoretical predictions. The remaining discrepancies are investigated by inspecting cross sections integrated over certain kinematical variables. The procedure of global comparisons leads to establishing regularities in disagreements between the experimental data and the theoretically predicted values of the cross sections. They indicate deficiencies still present in the assumed models of the 3N system dynamics.
description: 27 pages, 18 figures, submitted to Physical Review C
Elementary vibrational model for transport properties of dense fluids
Creators: name: Khrapak, Sergey
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A vibrational model of transport properties of dense fluids assumes that solid-like oscillations of atoms around their temporary equilibrium positions dominate the dynamical picture. The temporary equilibrium positions of atoms do not form any regular structure and are not fixed, unlike in solids. Instead, they are allowed to diffuse and this is why liquids can flow. However, this diffusive motion is characterized by much longer time scales compared to those of solid-like oscillations. Although this general picture is not particularly new, only in a recent series of works it has been possible to construct a coherent and internally consistent {\it quantitative} description of transport properties such as self-diffusion, shear viscosity, and thermal conductivity. Moreover, the magnitudes of these transport coefficients have been related to the properties of collective excitations in dense fluids. Importantly, the model is simple and no free parameters are involved. Recent achievements are summarized in this overview. Application of the vibrational model to various single-component model systems such as plasma-related Coulomb and screened Coulomb (Yukawa) fluids, the Lennard-Jones fluid, and the hard-sphere fluid is considered in detail. Applications to real liquids are also briefly discussed. Overall, good to excellent agreement with available numerical and experimental data is demonstrated. Conditions of applicability of the vibrational model and a related question concerning the location of the gas-liquid crossover are discussed.
description: Overview of the vibrational paradigm of fluid dynamics. arXiv admin note: text overlap with arXiv:2110.13201
การพัฒนากระบวนการเตรียมสารสกัดสมุนไพรไทยที่มีฤทธิ์ต้านอนุมูลอิสระ
Creators: name: ศรัณยู อุ่นทวี
Publisher: name: Thammasat University
Year: 2019
Subjects: Sappanwood
Indian gooseberry
anti-oxidant activity
non-communicable disease

description: Thai Journal of Science and Technology, 8, 5, 479-492
Hipparcos distances of Ophiuchus and Lupus cloud complexes
Creators: name: Lombardi, M.
name: Lada, C.
name: Alves, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine extinction maps from the Two Micron All Sky Survey (2MASS) with Hipparcos and Tycho parallaxes to obtain reliable and high-precision estimates of the distance to the Ophiuchus and Lupus dark complexes. Our analysis, based on a rigorous maximum-likelihood approach, shows that the rho-Ophiuchi cloud is located at (119 +/- 6) pc and the Lupus complex is located at (155 +/- 8) pc; in addition, we are able to put constraints on the thickness of the clouds and on their orientation on the sky (both these effects are not included in the error estimate quoted above). For Ophiuchus, we find some evidence that the streamers are closer to us than the core. The method applied in this paper is currently limited to nearby molecular clouds, but it will find many natural applications in the GAIA-era, when it will be possible to pin down the distance and three-dimensional structure of virtually every molecular cloud in the Galaxy.
description: A&A in press - Corrected typo (Lupus distance) in the electronic abstract
Analysis of longitudinal data with multiple levels of variation
Creators: name: Ding, Yao
Publisher: name: The Australian National University
Year: 2015

description: Longitudinal studies, in which subjects are measured repeatedly through time, play an important role in many areas of research. Often these longitudinal studies involve some complex experimental or sampling designs, which result in clustering or grouping between subjects, as well as serial correlation within subjects. The generalized estimating equation approach (GEE) is a method of parameter estimation that requires only a model for the mean of the data and the relationship between the mean and the variance. Traditionally GEE assumes independence between the subjects. When the independence assumption no longer holds, we modify the estimating equations for analysing longitudinal data with multiple levels of random variation. Simulation results show that the modified estimating equation method produces good estimates of the model parameters. Various bootstrap methods are assessed for making inference on the variance and the confidence intervals for the variance component and correlation parameter estimators, historically showing undercoverage. A new weighted estimating equation bootstrap, which uses different weight schemes for different parameter estimators, shows improved variance estimation and coverage probabilities for the variance component estimators. Non-normal errors are also discussed in the framework of the modified generalized estimating equations. The robust ML II estimators are generalized to fit the longitudinal data and the bootstrap estimators are revaluated in the context of the response contamination models. Finally the modified generalized estimating equation method, the robust estimating equation method and theirs corresponding bootstrap methods are implemented to two real datasets.
Cardiac differentiation of human embryonic stem cells as a measure for radiation risk in early embryogenesis
Creators: name: Schroeder, I. S.
name: Luft, S.
name: Braun, F.
name: Hessel, P.
name: Scholz, M.
name: Durante, M.
name: Ritter, S.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Experimental and modeling analysis of $\gamma$-H2AX dose response curves in the framework of the GLOBLE model
Creators: name: Tommasino, F.
name: Friedrich, T.
name: Jakob, B.
name: Meyer, B.
name: Durante, M.
name: Scholz, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Reactions for determination of $\bar{\nu}_e$-spectra from core-collapse supernovae
Creators: name: Lohs, A.
name: Martinez Pinedo, G.
name: Fischer, T.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Radiation in oriented crystals: Innovative application to future positron sources
Creators: name: Soldani, Mattia
name: Alharthi, Fahad
name: Bandiera, Laura
name: Canale, Nicola
name: Cavoto, Gianluca
name: Chaikovska, Iryna
name: Chehab, Robert
name: Guidi, Vincenzo
name: Haurylavets, Viktar
name: Mazzolari, Andrea
name: Negrello, Riccardo
name: Paternò, Gianfranco
name: Romagnoni, Marco
name: Sytov, Alexei
name: Tikhomirov, Victor
Publisher: name: arXiv
Year: 2024
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: It has been known since decades that the alignment of a beam of high-energy electrons with particular crystal directions involves a significant increase of bremsstrahlung radiation emission. This enhancement lies at the conceptual foundation of innovative positron source schemes for future lepton colliders. In particular, the so-called hybrid scheme makes use of a heavy-metal radiator in crystalline form, which is then followed by an amorphous metallic converter for positron generation from electrons by means of a two-step electromagnetic process. This work presents the most recent simulation results obtained on the development of a hybrid positron source for the FCC-$ee$ from the standpoint of the features of both the crystalline radiator and the amorphous converter.
A Modifiable Architectural Design for Commercial Greenhouses Energy Economic Dispatch Testbed
Creators: name: Clausen, Christian Skafte Beck
name: Jørgensen, Bo Nørregaard
name: Ma, Zheng Grace
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Facing economic challenges due to the diverse objectives of businesses, and consumers, commercial greenhouses strive to minimize energy costs while addressing CO2 emissions. This scenario is intensified by rising energy costs and the global imperative to curtail CO2 emissions. To address these dynamic economic challenges, this paper proposes an architectural design for an energy economic dispatch testbed for commercial greenhouses. Utilizing the Attribute-Driven De-sign method, core architectural components of a software-in-the-loop testbed are proposed which emphasizes modularity and careful consideration of the multi-objective optimization problem. This approach extends prior research by implementing a modular multi-objective optimization framework in Java. The results demonstrate the successful integration of the CO2 reduction objective within the modular architecture with minimal effort. The multi-objective optimization output can also be employed to examine cost and CO2 objectives, ultimately serving as a valuable decision-support tool. The novel testbed architecture and a modular approach can tackle the multi-objective optimization problem and enable commercial greenhouses to navigate the intricate landscape of energy cost and CO2 emissions management.
description: 19 pages
A Search for Giant Pulses from Millisecond Pulsars
Creators: name: Knight, H. S.
name: Bailes, M.
name: Manchester, R. N.
name: Ord, S. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have searched for microsecond-timescale broadband emission from a sample of eighteen millisecond pulsars. Our study places strong limits on such emission from several millisecond pulsars and shows that it is only present in a small subset of millisecond pulsars. Giant pulses of up to 64 times the mean pulse energy were detected from PSR J1823-3021A in the globular cluster NGC 6624. In contrast to the giant pulses of PSR B1937+21, nearly all of the giant pulses from PSR J1823-3021A were distributed within the trailing half of the main-pulse component of the integrated pulse profile. The fact that no giant pulses were observed on the leading side of the main-pulse component suggests that giant pulses are preferentially emitted closer to the last open field line than ordinary emission. The correlation between giant pulse emissivity and spin-down luminosity in millisecond pulsars suggests that the high period derivative of PSR J1823-3021A is intrinsic and is not just an artifact of its acceleration in the gravitational potential of NGC 6624.
description: 14 pages, 2 figures, accepted for publication in ApJ
Effective Langevin equations leading to large deviation function of time-averaged velocity for a nonequilibrium Rayleigh piston
Creators: name: Itami, Masato
name: Nakayama, Yohei
name: Nakagawa, Naoko
name: Sasa, Shin-ichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study fluctuating dynamics of a freely movable piston that separates an infinite cylinder into two regions filled with ideal gas particles at the same pressure but different temperatures. To investigate statistical properties of the time-averaged velocity of the piston in the long-time limit, we perturbatively calculate the large deviation function of the time-averaged velocity. Then, we derive an infinite number of effective Langevin equations yielding the same large deviation function as in the original model. Finally, we provide two possibilities for uniquely determining the form of the effective model.
description: 9 pages
Dynamical Scaling of Surface Roughness and Entanglement Entropy in Disordered Fermion Models
Creators: name: Fujimoto, Kazuya
name: Hamazaki, Ryusuke
name: Kawaguchi, Yuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Localization is one of the most fundamental interference phenomena caused by randomness, and its universal aspects have been extensively explored from the perspective of one-parameter scaling mainly for static properties. We numerically study dynamics of fermions on disordered onedimensional potentials exhibiting localization and find dynamical one-parameter scaling for surface roughness, which represents particle-number fluctuations at a given lengthscale, and for entanglement entropy when the system is in delocalized phases. This dynamical scaling corresponds to the Family-Vicsek scaling originally developed in classical surface growth, and the associated scaling exponents depend on the type of disorder. Notably, we find that partially localized states in the delocalized phase of the random-dimer model lead to anomalous scaling, where destructive interference unique to quantum systems leads to exponents unknown for classical systems and clean systems.
description: 27 pages, 15 figures
Summary of Vehicle Classification Data
Creators: name: Crabtree, Joseph D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: As part of an attempt to calculate accident rates for different vehicle types on various kinds of roads, it was necessary to determine the percentage of each vehicle type in the traffic stream for each type road. This was accomplished by summarizing Kentucky's Vehicle Classification File. The procedure used in summarizing the file and the results of the summary are presented in this report. Vehicle distributions are reported by number of lanes, by functional classification, by administrative classification, by federal-aid system, by hour of day, by day of week, and by month of year. It is believed this report provides the most extensive and accurate data currently available on vehicle type distributions in Kentucky.
Accident Rates by Vehicle Type
Creators: name: Crabtree, Joseph D.
name: Agent, Kenneth R.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: This report describes the calculation of accident rates for different vehicle types, using vehicle-miles travelled as the measure of exposure. Rates are reported for passenger cars, single-unit trucks, combination trucks, buses, and motorcycles on various highway types. Highway types are broken down by functional classificaion, administrative classification, number of lanes, and rural or urban location. Generally motorcycles had the highest rates and passenger cars had the lowest, although this varied by highway type.
Highway Sizing
Creators: name: Crabtree, Joseph D.
name: Deacon, John A.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: A critical examination is made of the conventional method for highway sizing, that is, determination of lane requirements. Ranked hourly traffic volume distributions, obtained from 1977 Kentucky volume stations are examined to test certain assumptions common to the conventional approach. Several of these distributions have no distinct "knee" and, for those which do, the knee is most frequently found outside the normally anticipated range. Of equal importance, the knee location can be arbitrarily altered simply by changing the number of highest volume hours that are examining.  The fundamental fallacy of the conventional procedure is its focus on a single design hour and its orientation toward conditions experienced by the the highway rather than the user. This can readily be overcome by basing size decisions on an alternate criterion such as the percentage of vehicles that suffer congestion during the design life. An example demonstrating this concept is presented.  More significant improvement can be achieved by directly computing the economic efficiency of investment in additional lanes. An example is presented to demonstrate current capabilities for such computations. the example also demonstrates that current procedures do not always yield the mos economical designs and that the most economical highway size is affected by the specific shape of the traffic volume distribution. Use of economic efficiency analysis as a standard tool in evaluating critical sizing decisions is highly recommended.
Radius selection using kernel density estimation for the computation of nonlinear measures
Creators: name: Medrano, Johan
name: Kheddar, Abderrahmane
name: Lesne, Annick
name: Ramdani, Sofiane
Publisher: name: arXiv
Year: 2024
Subjects: subject: Methodology (stat.ME)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantitative Methods (q-bio.QM)
subject: Other Statistics (stat.OT)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: When nonlinear measures are estimated from sampled temporal signals with finite-length, a radius parameter must be carefully selected to avoid a poor estimation. These measures are generally derived from the correlation integral which quantifies the probability of finding neighbors, i.e. pair of points spaced by less than the radius parameter. While each nonlinear measure comes with several specific empirical rules to select a radius value, we provide a systematic selection method. We show that the optimal radius for nonlinear measures can be approximated by the optimal bandwidth of a Kernel Density Estimator (KDE) related to the correlation sum. The KDE framework provides non-parametric tools to approximate a density function from finite samples (e.g. histograms) and optimal methods to select a smoothing parameter, the bandwidth (e.g. bin width in histograms). We use results from KDE to derive a closed-form expression for the optimal radius. The latter is used to compute the correlation dimension and to construct recurrence plots yielding an estimate of Kolmogorov-Sinai entropy. We assess our method through numerical experiments on signals generated by nonlinear systems and experimental electroencephalographic time series.
description: Accepted manuscript
title: Evaluation of Durable Crosswalk and Stopbar Marking Materials
title: (Interim Report)
titleType: Subtitle
Creators: name: Agent, Kenneth R.
name: Pigman, Jerry G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1984
Subjects: subject: Transportation Engineering

description: The objective of this study is to find the most cost-effective durable marking material to provide long-lasting stop bars and crossbars. Three materials were tested: 1) 3M Stamark tape, 2) Prismo preformed tape, and 3) extruded thermoplastic. The evaluation concerned the durability, reflectivity, and appearance of the materials. Test installations have been in place for about 18 months, and this interim report summarizes findings for that period. The evaluation will continue for another 18 months, and recommendations will be presented in a final report.  Based on current evaluations, the extruded thermoplastic material would be considered the most cost-effective material for crosswalk and stopbar installations.
A direct method for solving inverse Sturm-Liouville problems
Creators: name: Kravchenko, Vladislav V.
name: Torba, Sergii M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 34B09, 34B24, 34L20, 42C10, 45B05, 65L09, 65L60

description: We consider two main inverse Sturm-Liouville problems: the problem of recovery of the potential and the boundary conditions from two spectra or from a spectral density function. A simple method for practical solution of such problems is developed, based on the transmutation operator approach, new Neumann series of Bessel functions representations for solutions and the Gelfand-Levitan equation. The method allows one to reduce the inverse Sturm-Liouville problem directly to a system of linear algebraic equations, such that the potential is recovered from the first element of the solution vector. We prove the stability of the method and show its numerical efficiency with several numerical examples.
description: 31 pages, 10 figures. Some typos corrected
Applications of biorthogonal decompositions in fluid-structure interactions
Creators: name: Hémon, P.
name: Santi, F.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper is dedicated to the study of the orthogonal decomposition of spatially and temporally distributed signals in fluid-structure interaction problems. First application is concerned with the analysis of wall-pressure distributions over bluff bodies. The need for such a tool is increasing due to the progress in data acquisition systems and in computational fluid dynamics. The classical proper orthogonal decomposition (POD) method is discussed, and it is shown that heterogeneity of the mean pressure over the structure induces difficulties in the physical interpretation. It is then proposed to use the biorthogonal decomposition (BOD) technique instead; although it appears similar to POD, it is more general and fundamentally different since this tool is deterministic rather than statistical. The BOD method is described and adapted to wall-pressure distribution, with emphasis on aerodynamic load decomposition. The second application is devoted to the generation of a spatially correlated wind velocity field which can be used for the temporal calculation of the aeroelastic behaviour of structures such as bridges. In this application, the space-time symmetry of the BOD method is absolutely necessary. Examples are provided in order to illustrate and show the satisfactory performance and the interest of the method. Extensions to other fluid-structure problems are suggested.
Effect of magnon decays on parametrically pumped magnons
Creators: name: Hahn, Viktor
name: Kopietz, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the influence of magnon decays on the non-equilibrium dynamics of parametrically excited magnons in the magnetic insulator yttrium-iron garnet (YIG). Our investigations are motivated by a recent experiment by Noack et al. [Phys. Status Solidi B 256, 1900121 (2019)] where an enhancement of the spin pumping effect in YIG was observed near the magnetic field strength where magnon decays via confluence of magnons becomes kinematically possible. To explain the experimental findings, we have derived and solved kinetic equations for the non-equilibrium magnon distribution. The effect of magnon decays is taken into account microscopically via collision integrals derived from interaction vertices involving three powers of magnon operators. Our results agree quantitatively with the experimental data.
description: 23 pages, 18 figures
Counting Pockets with World Lines in Eternal Inflation
Creators: name: Easther, Richard
name: Lim, Eugene A.
name: Martin, Matthew R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the long standing puzzle of how to obtain meaningful probabilities in eternal inflation. We demonstrate a new algorithm to compute the probability distribution of pocket universe types, given a multivacua inflationary potential. The computed probability distribution is finite and manifestly gauge-independent. We argue that in some scenarios this technique can be applied to disfavor some eternally inflating potentials.
description: 16 pages, 9 figures, added references, minor elaboration on a few points to match published version
Successive common envelope events from multiple planets
Creators: name: Chamandy, Luke
name: Blackman, Eric G.
name: Nordhaus, Jason
name: Wilson, Emily
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Many stars harbour multi-planet systems. As these stars expand late in their evolutions, the innermost planet may be engulfed, leading to a common envelope (CE) event. Even if this is insufficient to eject the envelope, it may expand the star further, causing additional CE events, with the last one unbinding what remains of the envelope. This multi-planet CE scenario may have broad implications for stellar and planetary evolution across a range of systems. We develop a simplified version and show that it may be able to explain the recently observed planet WD 1856 b.
description: 5 pages, 2 figures, accepted for publication in MNRAS Letters
Inference of Time-Reversal Asymmetry from Time Series in a Piezoelectric Energy Harvester
Creators: name: Costanzo, L.
name: Baldassarri, A.
name: Schiavo, A. Lo
name: Sarracino, A.
name: Vitelli, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We consider the problem of assessing the non-equilibrium behavior of a system from the study of time series. In particular, we analyze experimental data from a piezoelectric energy harvester driven by broadband random vibrations where the extracted power and the relative tip displacement can be simultaneously measured. We compute autocorrelation and cross-correlation functions of these quantities in order to investigate the system properties under time reversal. We support our findings with numerical simulations of a linear underdamped Langevin equation, which very well describes the dynamics and fluctuations of the energy harvester. Our study shows that, due to the linearity of the system, from the analysis of a single variable, it is not possible to evidence the non-equilibrium nature of the dynamics. On the other hand, when cross-correlations are considered, the irreversible nature of the dynamics can be revealed.
description: 8 pages, 7 figures
O'QITUVCHILARNING SUN'IY INTELLEKT DAN FOYDALANISH KOMPETENSIYASINI SHAKLLANTIRISH
Creators: name: Usmanova Xurshida Aybekovna
Publisher: name: Zenodo
Year: 2025

description: Annotatsiya: Ushbu maqolada o'qituvchilarning sun'iy intellektdan foydalanish kompetensiyasini shakllantirishning ahamiyati, uning ta'lim jarayoniga ta'siri va o'qituvchilarning yangi texnologiyalarni qo'llashda qanday yondashuvlar tanlashlari zarurligi ko'rib chiqilgan. Sun'iy intellekt metodlarini ta'limda samarali qo'llash, o'quvchilarning o'rganish jarayonini individuallashtirish, faollik va motivatsiyani oshirishga imkon beradi. Maqolada shuningdek, o'qituvchilarga sun'iy intellekt texnologiyalaridan foydalanish uchun kerakli kompetensiyalarni shakllantirishda treninglar, amaliyot va ehtiyotkorlikni hisobga olish zarurligi haqida fikrlar berilgan.
Noncommutativity in Configuration Space Induced by A Conjugate Magnetic Field in Phase Space
Creators: name: Govaerts, Jan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81R30, 81R60

description: As is well known, an external magnetic field in configuration space coupled to a quantum dynamics induces noncommutativity in its velocity momentum space. By phase space duality, an external vector potential in the conjugate momentum sector of the system induces noncommutativity in its configuration space. Such a rationale for noncommutativity is explored herein for an arbitrary configuration space of Euclidean geometry. Ordinary quantum mechanics with a commutative configuration space is revisited first. Through the introduction of an arbitrary positive definite $*$-product, a one-to-one correspondence between the Hilbert space of abstract quantum states and that of the enveloping algebra of the position quantum operators is identified. A parallel discussion is then presented when configuration space is noncommutative, and thoroughly analysed when the conjugate magnetic field is momentum independent and nondegenerate. Once again the space of quantum states may be identified with the enveloping algebra of the noncommutative position quantum operators. Furthermore when the positive definite $*$-product is chosen in accordance with the value of the conjugate magnetic field which determines the commutator algebra of the coordinate operators, these operators span a Fock algebra of which the canonical coherent states are the localised noncommutative quantum analogues of the sharp and structureless local points of the associated commutative configuration space geometry. These results generalise and justify a posteriori within the context of ordinary canonical quantisation the heuristic approach to quantum mechanics in the noncommutative Euclidean plane as constructed and developed by F. G. Scholtz and his collaborators.
description: 1+46 pages, original e-print format, published in up-dated form in Mathematics, Special Issue: Recent Advances in Quantum Theory and Its Applications
Dynamics of Primordial Hydrogen Recombination with Allowance for a Recoil for Scattering in the Ly-alpha Line
Creators: name: Grachev, S. I.
name: Dubrovich, V. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is shown that taking into account a recoil for radiation scattering in the Ly-alpha line can lead to a noticable acceleration of primordial hydrogen recombination. Thus for LambdaCDM model a decrease of ionization degree exceeds 1% for redshifts z in a range 800 - 1050 achieving approximately 1.3% at z=900. Corresponding corrections to the cosmic microwave background power spectra can achieve 1.1% for TT spectra and 1.7% for EE ones. Radiative transfer in these calculations was treated in a quasistationary approximation. Numerical solutions are also obtained in diffusion approximation for a nonstationary problem of Ly-alpha line radiative transfer under partial frequency redistribution with a recoil. An evolution of a local line profile is traced to as well as an evolution of a relative number of uncompensated transitions from 2p state down to 1s one. It is shown that taking into account nonstationarity of Ly-alpha line radiative transfer can lead to an additional acceleration of primordial hydrogen recombination.
description: 9 pages, 5 figures; accepted for publication in Astronomy Letters
Classical resummation and breakdown of strong-field QED
Creators: name: Heinzl, T.
name: Ilderton, A.
name: King, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: QED perturbation theory has been conjectured to break down in sufficiently strong backgrounds, obstructing the analysis of strong-field physics. We show that the breakdown occurs even in classical electrodynamics, at lower field strengths than previously considered, and that it may be cured by resummation. As a consequence, an analogous resummation is required in QED. A detailed investigation shows, for a range of observables, that unitarity removes diagrams previously believed to be responsible for the breakdown of QED perturbation theory.
description: 8 pages, 2 figures; v2: Journal version with Supplementaries added
Neutrino nucleosynthesis of radioactive nuclei in supernovae
Creators: name: Sieverding, A.
name: Huther, L.
name: Martinez Pinedo, G.
name: Langanke, K.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Neutrino oscillations in core-collapse supernovae
Creators: name: Wu, M.
name: Qian, Y.
name: Martinez Pinedo, G.
name: Fischer, T.
name: Huther, L.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Report on specification, development and provision of the Blockchain functionality and smart contracts
Creators: name: Bosco, Ferdinando
name: croce, Vincenzo
name: Tenorio Fornés, Ámbar
name: Melissari, Filisia
name: Orfanoudakis, Aggelos
name: Leligou, Helen C. (Nelly)
name: Fernández-Cedrón, Iago
Publisher: name: Zenodo
Year: 2025

description: This deliverable presents the concept of Blockchain Technology, NFTs and related Web3 technologies and how these technologies can be applied in the context of Creative Industries, for empowering creators by endowing them with greater ownership and control over their digital assets.All the DAFNE+ Platform components, based on blockchain technology and smart contracts are described in this document, reporting the core concepts, the architectures, the main functionalities, and the technical specifications.
Tests of a Prototype Multiplexed Fiber-Optic Ultra-fast FADC Data Acquisition System for the MAGIC Telescope
Creators: name: Bartko, H.
name: Goebel, F.
name: Mirzoyan, R.
name: Pimpl, W.
name: Teshima, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ground-based Atmospheric Air Cherenkov Telescopes (ACTs) are successfully used to observe very high energy (VHE) gamma rays from celestial objects. The light of the night sky (LONS) is a strong background for these telescopes. The gamma ray pulses being very short, an ultra-fast read-out of an ACT can minimize the influence of the LONS. This allows one to lower the so-called tail cuts of the shower image and the analysis energy threshold. It could also help to suppress other unwanted backgrounds. Fast 'flash' analog-to-digital converters (FADCs) with GSamples/s are available commercially; they are, however, very expensive and power consuming. Here we present a novel technique of Fiber-Optic Multiplexing which uses a single 2 GSamples/s FADC to digitize 16 read-out channels consecutively. The analog signals are delayed by using optical fibers. The multiplexed (MUX) FADC read-out reduces the cost by about 85% compared to using one ultra-fast FADC per read-out channel. Two prototype multiplexers, each digitizing data from 16 channels, were built and tested. The ultra-fast read-out system will be described and the test results will be reported. The new system will be implemented for the read-out of the 17m diameter MAGIC telescope camera.
description: 31 pages, 26 figures, to be published in NIM A
Autonomous Brownian gyrators: a study on gyrating characteristics
Creators: name: Chang, Hsin
name: Lee, Chi-Lun
name: Lai, Pik-Yin
name: Chen, Yung-Fu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the nonequilibrium steady-state (NESS) dynamics of two-dimensional Brownian gyrators under harmonic and nonharmonic potentials via computer simulations and analyses based on the Fokker-Planck equation, while our nonharmonic cases feature a double-well potential and an isotropic quartic potential. In particular, we report two simple methods that can help understand gyrating patterns. For harmonic potentials, we use the Fokker-Planck equation to survey the NESS dynamical characteristics, i.e., the NESS currents gyrate along the equiprobability contours and the stationary point of flow coincides with the potential minimum. As a contrast, the NESS results in our nonharmonic potentials show that these properties are largely absent, as the gyrating patterns are much distinct from those of corresponding probability distributions. Furthermore, we observe a critical case of the double-well potential, where the harmonic contribution to the gyrating pattern becomes absent, and the NESS currents do not circulate about the equiprobability contours nearby the potential minima even at low temperatures.
description: 9 pages, 3 figures