cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Djorgovski-Gurzadyan dark energy integral equation and the Hubble diagram
Creators: name: Khachatryan, H. G.
name: Stepanian, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the observational aspects of the value of dark energy density from quantum vacuum fluctuations based initially on the Gurzadyan-Xue model. We reduce the Djorgovski-Gurzadyan integral equation to a differential equation for the co-moving horizon and then, by means of the obtained explicit form for the luminosity distance, we construct the Hubble diagram for two classes of observational samples. For supernova and gamma-ray burst data we show that this approach provides viable predictions for distances up to $z \simeq 9$, quantitatively at least as good as those provided by the lambda cold dark matter ($Λ$CDM) model. The Hubble parameter dependence $H(z)$ of the two models also reveals mutual crossing at $z=0.4018$, the interpretation of which is less evident.
description: A&A Lett. (in press), 4 pages, 5 figures
The Influence of Road Bumps on Vehicle Vertical Dynamics and Vision Systems - A Validated Reference Model
Creators: name: Weber, Yannik
name: Kanarachos, Stratis
Publisher: name: Zenodo
Year: 2019
Subjects: Road Bumps
Vehicle Dynamics
Vehicle Vision
Monocular Camera
Environmental Perception
Validation

description: Reliability of vehicle vision systems is essential for the realisation of automated driving. Camera-based object detection and tracking systems allow the vehicle to perceive and understand its surroundings to safely navigate in and through the environment. In the development process, estimating corner and potential failure cases is a crucial step to evaluate the system’s performance. Even a small deviation from known scenarios can cause system disengagements or failures. While emphasis is mostly put on the development of detection systems in simulated flat world models, the influence of vehicle dynamics is largely neglected. Road and speed bumps can have a significant impact on the tracking and position estimation process of other road participants and potentially hazardous objects.
 IPG CarMaker is a vehicle simulation tool combining advanced multi-body vehicle dynamics models with a road envelope editor for the realistic recreation of road threats. Furthermore, several sensor types can be applied to the digital vehicle twin to perceive the environment.
 Our experiments focus on the simulation of vehicle dynamics and a monocular camera sensor to estimate the influence of road bumps on the performance of vehicle vision systems. We validated a vehicle dynamics model and a real-world camera in the simulation environment for according use case. Included to the publication are three recorded video sequences from the monocular camera device as well as simulation data from a complete multi-body vehicle dynamics chassis model.
title: Federal Aid Research Task No. 28
title: Pavement Failures: I-71 Oldham - Henry Counties
titleType: Subtitle
Creators: name: Graves, Clark
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Breaking and Seating has been used extensively to rehabilitate portland cement concrete pavements. In areas where specific vertical tolerances must be maintained, several methods have been used - - tapering of the asphaltic overlay, removal of the portland cement concrete replaced by full depth asphaltic concrete, or milling of the existing pavement and reducing the asphaltic concrete overlay.  Research Report UKTRP-87-26, "Breaking and Seating of Rigid Pavements" was prepared as a final report for three studies and as an interim report for Federal Aid Research Task No. 28 and two other studies. This report serves to finalize Federal Aid Research Task No. 28
Defect Formation with Bulk Fields
Creators: name: Moore, Guy D.
name: Stoica, Horace
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has recently been realized that brane-antibrane annihilation (a possible explanation for ending inflation) may result in defect formation, due to the dynamics of the tachyon field. Studies of this possibility have generally ignored the interaction of the brane fields with fields in the bulk; recently it has been argued [1] that interactions with bulk fields suppress or even eliminate defect formation. To investigate the impact of bulk fields on brane defect formation, we construct a toy model that captures the essential features of the tachyon condensation with bulk fields. We study the structure of defects in this toy model, and simulate their formation and evolution on the lattice. We find that, while the energetics and interactions of defects are influenced by the size of the extra dimension and the bulk-brane coupling, the bulk-brane coupling does not prevent the formation of a defect network.
description: 23 pages, 5 figures, revtex4, 2 appendices added
The influence of rainfall on murid densities through a trophic chain in the Kluane boreal forest, Yukon
Creators: name: Carrier, Patrick
Publisher: name: University of British Columbia
Year: 2009

description: Vole and mouse population densities in the Kluane boreal forest (Yukon) vary noncyclically; densities are usually low but unpredictable and ephemeral high densities occasionally occur. Anecdotal observations suggest that vole and mouse densities could be correlated to summer rainfall amounts. Small mammal populations in Kluane are suspected to be food-limited, and food production is suspected to be rainfall-limited, since the Kluane boreal forest experiences a water-deficit during the summer. I tested the hypothesis that rainfall acts through a trophic chain to influence vole numbers, and that vole numbers should increase with rainfall two-to-three fold as they do with addition of sunflower seed. To simulate increased rainfall, I installed irrigation systems and operated them for two summers on three areas of approximately 1.5 hectares of boreal forest habitat. I monitored small mammals, mushrooms, understory vegetation, spruce trees and forest-floor invertebrates. Three unirrigated areas of equal size were used as control grids: treatment and control grids were paired within three different sites. Mushrooms and one species of understory plant (Arctostaphylos uva-ursi) responded significantly to the treatment. There was no clear treatment effect on spruce trees, invertebrates, and shrews. Voles were generally more numerous on the treatment grids than on the controls, but the difference was of the expected three-fold magnitude at only one site. Overall, only one out of three sites supported the hypothesis that vole densities can be affected by rainfall through a trophic chain.
The running coupling from the four-gluon vertex in Landau gauge Yang-Mills theory
Creators: name: Kellermann, Christian
name: Fischer, Christian S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the running coupling from the four-gluon vertex in Landau gauge, SU($N_c$) Yang-Mills theory as given by a combination of dressing functions of the vertex and the gluon propagator. We determine these functions numerically from a coupled set of Dyson-Schwinger equations. We reproduce asymptotic freedom in the ultraviolet momentum region and find a coupling of order one at mid-momenta. In the infrared we find a nontrivial (i.e. nonzero) fixed point which is three orders of magnitude smaller than the corresponding fixed point in the coupling of the ghost-gluon vertex. This result explains why the Dyson-Schwinger and the functional renormalization group equations for the two point functions can agree in the infrared, although their structure is quite different. Our findings also support Zwanziger's notion of an infrared effective theory driven by the Faddeev-Popov determinant.
description: 25 pages, 4 figures; v2: minor clarifications added and typos corrected, version accepted by PRD
Creating Equality for those in Crisis
Creators: name: Norton, Michael John
name: Swords, Calvin
Publisher: name: Academic Quarter | Akademisk kvarter
Year: 2021

description: The 21st century has seen an increasing focus on the concept of co-production in seeking to tackle the tokenistic approach often taken by services to recovery in mental health. It originated from the scholarly work of Elinor Ostrom in America in the 1970’s and was further developed through the works of Edgar Cahn. In a bid to create a service that is more recovery orientated, many community mental health services have adopted co-production as a foundation for all work they conduct with service users/family members and carers. It is reported that co-production can be transformative in practice if done correctly. More specifically, this can include circumstances where individuals are presenting in crisis. However, there is a paucity of research/perspectives in this specific area. The aim of this perspective paper is to highlight such literature whilst also debating the ethical considerations to co-production within the acute inpatient mental health services.
description: Academic Quarter | Akademisk kvarter, Nr. 23 (2021): Co-production and co-creation: Perspectives, forms of practice, and contexts
Pavement Evaluation Elkhorn Drive
Creators: name: Graves, R. Clark
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: The Lexington-Fayette Urban County Government requested that the Kentucky Transportation Center perform a pavement evaluation and overlay design for Elkhorn Drive. This pavement section consisted of 3 inches of asphaltic concrete and 8 inches of dense graded aggregate. A visual inspection during testing revealed several areas of severe alligator cracking along with some areas of transverse cracking.
4D gravity localized in non Z_2-symmetric thick branes
Creators: name: Barbosa-Cendejas, Nandinii
name: Herrera-Aguilar, Alfredo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a comparative analysis of localization of 4D gravity on a non Z_2-symmetric scalar thick brane in both a 5-dimensional Riemannian space time and a pure geometric Weyl integrable manifold. This work was mainly motivated by the hypothesis which claims that Weyl geometries mimic quantum behaviour classically. We start by obtaining a classical 4-dimensional Poincare invariant thick brane solution which does not respect Z_2-symmetry along the (non-)compact extra dimension. The scalar energy density of our field configuration represents several series of thick branes with positive and negative energy densities centered at y_0. The only qualitative difference we have encountered when comparing both frames is that the scalar curvature of the Riemannian manifold turns out to be singular for the found solution, whereas its Weylian counterpart presents a regular behaviour. By studying the transverse traceless modes of the fluctuations of the classical backgrounds, we recast their equations into a Schroedinger's equation form with a volcano potential of finite bottom (in both frames). By solving the Schroedinger equation for the massless zero mode m^2=0 we obtain a single bound state which represents a stable 4-dimensional graviton in both frames. We also get a continuum gapless spectrum of KK states with positive m^2>0 that are suppressed at y_0, turning into continuum plane wave modes as "y" approaches spatial infinity. We show that for the considered solution to our setup, the potential is always bounded and cannot adopt the form of a well with infinite walls; thus, we do not get a discrete spectrum of KK states, and we conclude that the claim that Weylian structures mimic, classically, quantum behaviour does not constitute a generic feature of these geometric manifolds.
description: 13 pages, 4 figures, JHEP format
ESM 1 from Evolutionary versatility of the avian neck
Creators: name: Marek, Ryan D.
name: Falkingham, Peter L.
name: Benson, Roger B. J.
name: Gardiner, James D.
name: Maddox, Thomas W.
name: Bates, Karl T.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: File containing supplementary information as part of Marek et al. (2020)
Solar Cycle Variations in Ice Acidity at the End of the Last Ice Age: Possible Marker of a Climatically Significant Interstellar Dust Incursion
Creators: name: LaViolette, Paul
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Physics (physics.gen-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Hammer et al. [1997] report the presence of regularly spaced acidity peaks (H+, F-, Cl-) in the Byrd Station, Antarctica ice core. The event has a duration of about one century and falls at the beginning of the deglacial warming. Volcanism appears to be an unlikely cause since the total acid deposition of this event was about 18 fold greater than the largest known volcanic eruption, and since volcanic eruptions are not known to recur with such regularity. We show that the recurrence period of these peaks averages to 11.5 +/- 2.4 years, which approximates the solar cycle period, and suggest that this feature may have an extraterrestrial origin. We propose that this material may mark a period of enhanced interstellar dust and gas influx modulated by the solar cycle. The presence of this material could have made the Sun more active and have been responsible for initiating the warming that ended the last ice age.
description: 16 pages, 4 figures, 2 tables, to appear in Planetary and Space Science
Analytical solution for an acoustic boundary layer around an oscillating rigid sphere
Creators: name: Klaseboer, Evert
name: Sun, Qiang
name: Chan, Derek Y. C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Analytical solutions in fluid dynamics can be used to elucidate the physics of complex flows and to serve as test cases for numerical models. In this work, we present the analytical solution for the acoustic boundary layer that develops around a rigid sphere executing small amplitude harmonic rectilinear motion in a compressible fluid. The mathematical framework that describes the primary flow is identical to that of wave propagation in linearly elastic solids, the difference being the appearance of complex instead of real valued wave numbers. The solution reverts to well-known classical solutions in special limits: the potential flow solution in the thin boundary layer limit, the oscillatory flat plate solution in the limit of large sphere radius and the Stokes flow solutions in the incompressible limit of infinite sound speed. As a companion analytical result, the steady second order acoustic streaming flow is obtained. This streaming flow is driven by the Reynolds stress tensor that arises from the axisymmetric first order primary flow around such a rigid sphere. These results are obtained with a linearization of the non-linear Navier-Stokes equations valid for small amplitude oscillations of the sphere. The streaming flow obeys a time-averaged Stokes equation with a body force given by the Nyborg model in which the above mentioned primary flow in a compressible Newtonian fluid is used to estimate the time-averaged body force. Numerical results are presented to explore different regimes of the complex transverse and longitudinal wave numbers that characterize the primary flow.
Pavement Inspection Derbyshire Estates
Creators: name: Graves, R. Clark
name: Allen, David L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: The subject project was constructed in the fall of 1988. Soon after construction, the pavement began to deteriorate. Areas of alligator cracking were observed along with extensive rutting and pushing of the asphaltic concrete. Distresses occurred soon after the roadway was completed. Personnel of the Jefferson Co. Public Works Department requested that Kentucky Transportation Center (KTC) personnel make a preliminary inspection.  Kentucky Transportation Center (KTC) personnel conducted preliminary tests at the site on July 11, 1989. Results of tests were outlined in a letter to Schimpeler-Corradino Associates, on July 19, 1989. After review, of those results, Schimpeler-Corradino principals requested that additional testing be performed.  KTC personnel were provided with a testing plan which outlined specific testing locations. After review, the testing locations were accepted with the addition of one test location. Testing and sampling were conducted from July 22 through July 24, 1989.
Metallicity and Nuclear Star Formation in Nearby Galaxy Pairs: Evidence for Tidally Induced Gas Flows
Creators: name: Kewley, L. J.
name: Geller, M. J.
name: Barton, E. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive the first luminosity-metallicity relation for a large objectively selected sample of local galaxy pairs and we compare the pairs LZ relation with the relation for the Nearby Field Galaxy Survey (NFGS). Galaxy pair members with small projected separations (s<20 kpc/h) have systematically lower metallicities (~0.2 dex on average) than the field galaxies, or than more widely separated pairs at the same luminosity. There is a strong correlation between metallicity and central burst strength in the galaxy pairs. All five galaxies in the pairs sample with strong central bursts have close companions and metallicities lower than the comparable field galaxies. Our results provide strong observational evidence for a merger scenario where galaxy interactions cause gas flows towards the central regions, carrying less enriched gas from the outskirts of the galaxy into the central regions. The less enriched gas dilutes the pre-existing nuclear gas to produce a lower metallicity than would be obtained prior to the interaction. These gas flows trigger central bursts of star formation, causing strong central burst strengths, and possibly aiding the formation of blue bulges. We show that the timescale and central gas dilution required by this scenario are consistent with predictions from hydrodynamic merger models.
description: 16 pages, 15 figures. Submitted to AJ
When peer support workers engage in co-creating mental health services
Creators: name: Bakke Åkerblom, Kristina
Publisher: name: Academic Quarter | Akademisk kvarter
Year: 2021

description: Worldwide, there is an increasing interest in employing citizens with lived experience of mental health challenges. They enter mental health services as peer support workers (PSWs). Their objective is twofold – to ensure service users’ involvement in service production and bring a service user perspective to service development. PSWs’ engagement in mental health services has both a moral and a pragmatic intention. Including those whose work is planned for (or PSWs) is generally portrayed as fulfilling a societal and moral obligation. When those affected are included, outputs (such as service provision) will be more effective. This conceptual paper discusses the conditions in which PSWs can inform new practice generation and promote innovative mental health services. Theoretical perspectives from public sector innovation studies illustrate how PSWs may play an essential role in co-designing new and improved services and engage as partners in shaping and co-creating service priorities.
description: Academic Quarter | Akademisk kvarter, Nr. 23 (2021): Co-production and co-creation: Perspectives, forms of practice, and contexts
Pavement Base Evaluation KY 55 Taylor County
Creators: name: Graves, R. Clark
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: This report summarizes the findings of a field investigation of the aggregate underdrain system constructed on KY 55 in Taylor County. A detailed description of the construction of this project is presented in UKTRP Research Report 83-13 (Water Under Pavements).
Load Indicating Washers
Creators: name: Hopwood, Theodore
name: Courtney, Edgar E.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Kentucky Transportation Center (KTC) personnel monitored the installation of load indicating washers (LIWs) on the US 60 bridge at Catlettsburg, KY during construction. On completion of the bridge, KTC personnel performed torque measurements on a number of LIW installations. LIWs previously installed on the Thirteenth Street Bridge over the Ohio River at Ashland, KY were also inspected.  The KTC construction inspections revealed no significant problems in installing LIWs. Workers were able to use them to determine proper bolt assembly installation. They also permitted inspectors to rapidly check for proper bolt tension. As with other bolt tensioning methods, LIWs had to be tested prior to installation.  The follow-up field torque tests indicated that the LIWs provided consistent bolt tension values.  The only potential service problem with LIWs, as discerned on the Thirteenth Street bridge, is related to corrosion. Uncoated LIWs must be hand painted to prevent rusting.
Rotation of the cluster of galaxies A2107
Creators: name: Kalinkov, M.
name: Valchanov, T.
name: Valtchanov, I.
name: Kuneva, I.
name: Dissanska, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present indications of rotation in the galaxy cluster A2107 by a method that searches for the maximum gradient in the velocity field in a flat disk-like model of a cluster. Galaxies from cumulative sub-samples containing more and more distant members from the cluster centre, are projected onto an axis passing through the centre and we apply a linear regression model on the projected distances $x$ and the line-of-sight velocities $V$. The axis with the maximum linear correlation coefficient $r_{max} = \max [ r(V,x) ]$ defines the direction of the maximum velocity gradient, and consequently it presents the major axis of the apparently elliptical cluster. Because the effects of rotation are subtle, we put strong emphasis on the estimation of the uncertainties of the results by implementing different bootstrap techniques. We have found the rotational effects are more strongly expressed from distances $0.26 ÷0.54$ Mpc from the cluster centre. The total virial mass of the cluster is $(3.2\pm0.6)\times10^{14} {\cal M}_{\sun}$, while the virial mass, corrected for the rotation, is $(2.8\pm0.5) \times 10^{14}{\cal M}_{\sun}$.
description: 7 pages, 9 figures gzipped tar file. to be published in MNRAS
Black strings in (4+1)-dimensional Einstein-Yang-Mills theory
Creators: name: Brihaye, Y.
name: Hartmann, B.
name: Radu, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study two classes of static uniform black string solutions in a (4+1)-dimensional SU(2) Einstein-Yang-Mills model. These configurations possess a regular event horizon and corresponds in a 4-dimensional picture to axially symmetric black hole solutions in an Einstein-Yang-Mills-Higgs-U(1)-dilaton theory. In this approach, one set of solutions possesses a nonzero magnetic charge, while the other solutions represent black holes located in between a monopole-antimonopole pair. A detailed analysis of the solutions' properties is presented, the domain of existence of the black strings being determined. New four dimensional solutions are found by boosting the five dimensional configurations. We also present an argument for the non-existence of finite mass hyperspherically symmetric black holes in SU(2) Einstein-Yang-Mills theory.
description: 19 Revtex pages, 27 eps-figures; discussion on rotating black holes modified
Limitations of the recall capabilities in delay based reservoir computing systems
Creators: name: Köster, Felix
name: Ehlert, Dominik
name: Lüdge, Kathy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Emerging Technologies (cs.ET)
subject: Machine Learning (cs.LG)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: Optics (physics.optics)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We analyze the memory capacity of a delay based reservoir computer with a Hopf normal form as nonlinearity and numerically compute the linear as well as the higher order recall capabilities. A possible physical realisation could be a laser with external cavity, for which the information is fed via electrical injection. A task independent quantification of the computational capability of the reservoir system is done via a complete orthonormal set of basis functions. Our results suggest that even for constant readout dimension the total memory capacity is dependent on the ratio between the information input period, also called the clock cycle, and the time delay in the system. Optimal performance is found for a time delay about 1.6 times the clock cycle
“Samskaping” i norsk offentlig sektor
Creators: name: Paulsen Breimo, Janne
name: Røiseland, Asbjørn
Publisher: name: Academic Quarter | Akademisk kvarter
Year: 2021

description: “Co-creation” in Norwegian public sector – Changes, Opportunism or Symbolism? The Norwegian word for co-creation, “samskaping”, is a new-constructed word that during the last 5 years has become a key concept in the public sector. How to understand this conceptual change? By leaning on theories about organizational diffusion and translation, the article explores to what extent we are witnessing a real versus more symbolic change. The article analyses the spread of co-creation based in web-searches in Norwegian public websites. The analysis shows that while “samskaping” at the national level mostly relates to welfare services (elderly care), the local level displays a more mixed picture where “samskaping” also relates to regional and local development. Relating to translation theory, this preliminary analysis indicates that the drive towards co-creation is propelled by a mixture of different motivations, spanning from more interaction with citizens, opportunistic use of co-creation, and more symbolic functions.
description: Academic Quarter | Akademisk kvarter, Nr. 23 (2021): Co-production and co-creation: Perspectives, forms of practice, and contexts
Spin Accumulation and Spin Relaxation in a Large Open Quantum Dot
Creators: name: Koop, E. J.
name: van Wees, B. J.
name: Reuter, D.
name: Wieck, A. D.
name: van der Wal, C. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report electronic control and measurement of an imbalance between spin-up and spin-down electrons in micron-scale open quantum dots. Spin injection and detection was achieved with quantum point contacts tuned to have spin-selective transport, with four contacts per dot for realizing a non-local spin-valve circuit. This provides an interesting system for studies of spintronic effects since the contacts to reservoirs can be controlled and characterized with high accuracy. We show how this can be used to extract in a single measurement the relaxation time for electron spins inside the dot ~ 300 ps and the degree of spin polarization of the contacts P ~ 0.8.
description: 4 pages, 4 figures
Ultra-slow-roll inflation with quantum diffusion
Creators: name: Pattison, Chris
name: Vennin, Vincent
name: Wands, David
name: Assadullahi, Hooshyar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the effect of quantum diffusion on the dynamics of the inflaton during a period of ultra-slow-roll inflation. We extend the stochastic-$δ\mathcal{N}$ formalism to the ultra-slow-roll regime and show how this system can be solved analytically in both the classical-drift and quantum-diffusion dominated limits. By deriving the characteristic function, we are able to construct the full probability distribution function for the primordial density field. In the diffusion-dominated limit, we recover an exponential tail for the probability distribution, as found previously in slow-roll inflation. To complement these analytical techniques, we present numerical results found both by very large numbers of simulations of the Langevin equations, and through a new, more efficient approach based on iterative Volterra integrals. We illustrate these techniques with two examples of potentials that exhibit an ultra-slow-roll phase leading to the possible production of primordial black holes.
description: 35 pages without appendices (total 43 pages), 9 figures, matches the version published in JCAP
Democratic possibilities and limitations of digital co-creation
Creators: name: Tortzen, Anne
Publisher: name: Academic Quarter | Akademisk kvarter
Year: 2021

description: Platform-based, virtual co-creation in cities is currently a major, global trend. In response to democratic challenges, cities like Madrid, Barcelona, Paris and Reykjavik invite citizens to co-create the city through virtual platforms. Based on research in the fields of e-participation and digital crowdsourcing and drawing on the first mover cases of Reykjavik and Barcelona, this article explores the democratic possibilities and limitations of this type of digital co-creation.
description: Academic Quarter | Akademisk kvarter, Nr. 23 (2021): Co-production and co-creation: Perspectives, forms of practice, and contexts
Synthesis and Characterization of Polyoxometalate-Organic Architectures as Potential Photochromes and Mediators for Noncovalent Interactions
Creators: name: CHOUDHARI, MANJIRI PANDURANG
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 340301
subject: Inorganic materials (incl. nanomaterials)
classificationCode: 340304
subject: Optical properties of materials
classificationCode: 340308
subject: Supramolecular chemistry

description: This thesis describes the chemical synthesis and characterization of photoswitchable, hybrid inorganic-organic molecular oxides supramolecular assemblies. These novel compounds use newly isolated molecular oxides to drive self-assembly and have great potential in various applications, including catalysis, medicinal delivery systems, and optical devices.
Periodic cellular automata and Bethe ansatz
Creators: name: Kuniba, Atsuo
name: Takenouchi, Akira
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We review and generalize the recent progress in a soliton cellular automaton known as the periodic box-ball system. It has the extended affine Weyl group symmetry and admits the commuting transfer matrix method and the Bethe ansatz at q=0. Explicit formulas are proposed for the dynamical period and the number of states characterized by conserved quantities.
description: 8 pages
Quantitative experimental observation of weak inertial-wave turbulence
Creators: name: Monsalve, Eduardo
name: Brunet, Maxime
name: Gallet, Basile
name: Cortet, Pierre-Philippe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We report the quantitative experimental observation of the weak inertial-wave turbulence regime of rotating turbulence. We produce a statistically steady homogeneous turbulent flow that consists of nonlinearly interacting inertial waves, using rough top and bottom boundaries to prevent the emergence of a geostrophic flow. As the forcing amplitude increases, the temporal spectrum evolves from a discrete set of peaks to a continuous spectrum. Maps of the bicoherence of the velocity field confirm such a gradual transition between discrete wave interactions at weak forcing amplitude, and the regime described by weak turbulence theory (WTT) for stronger forcing. In the former regime, the bicoherence maps display a near-zero background level, together with sharp localized peaks associated with discrete resonances. By contrast, in the latter regime the bicoherence is a smooth function that takes values of the order of the Rossby number, in line with the infinite-domain and random-phase assumptions of WTT. The spatial spectra then display a power-law behavior, both the spectral exponent and the spectral level being accurately predicted by WTT at high Reynolds number and low Rossby number.
description: Accepted for publication in Physical Review Letters
Closed-loop control strategy with improved current for a flashing ratchet
Creators: name: Dinis, L.
name: Parrondo, J. M. R.
name: Cao, F. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show how to switch on and off the ratchet potential of a collective Brownian motor, depending only on the position of the particles, in order to attain a current higher than or at least equal to that induced by any periodic flashing. Maximization of instant velocity turns out to be the optimal protocol for one particle but is nevertheless defeated by a periodic switching when a sufficiently large ensemble of particles is considered. The protocol presented in this article, although not the optimal one, yields approximately the same current as the optimal protocol for one particle and as the optimal periodic switching for an infinite number of them.
description: 4 pages, 4 figures
A flavonoid study of the lauraceae
Creators: name: Yang, Ji Yong
Publisher: name: University of British Columbia
Year: 2009

description: A total of 80 compounds, consisting mainly o f flavonols, were observed in a leaf chemistry survey of 120 species and 35 genera of Lauraceae. A common flavonoid pattern of quercetin-3-(9-glucoside, quercetin-3-O-xyloside, quercetin-3-O-rhamnoside, kaempferol-3-<9-glucoside and kaempferol-3-O-rhamnoside was widely exhibited in the family. Quercetin and kaempferol di- and triglycosides were the next most common compounds followed by C-glycosylflavones, flavones, flavanones, methylated flavonols and chalcones. Flavonoids, like the morphological characters of the Lauraceae, showed large variation within genera; however, the restricted distribution of certain compounds clarified some relationships within controversial genera. The widespread occurrence of C-glycosylflavones in the expanded tribe Perseeae sensu van der Werff and Richter (1996) supports their new classification of this tribe. The lack of C-glycosylflavones in Sassafras, Umbellularia and Actinodaphne supports Rohwer's (1993b) and van der Werff and Richter's (1996) treatment of these genera in their tribe Laureae. C-Glycosylflavones also supports the transfer of the American species of Cinnamomum back to Phoebe. Lastly, the unique occurrence of chrysin in Hypodaphnis supports the placement of this genus in its own tribe as indicated by Kostermans (1957). In addition, flavonoid data have also revealed the classic eastern Asia-eastern North America disjunct distribution in several species of Persea, Lindera and Sassafras.
MPEC 2025-G71 : 2025 FV23
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 FV23

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Iterative roots of exclusive multifunctions
Creators: name: Liu, Liu
name: Li, Lin
name: Zhang, Weinian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 39B12, 37E05, 54C60

description: In this paper we investigate iterative roots of strictly monotone upper semi-continuous multifunctions having finitely many jumps. Known results are concerning roots of order 2 for multifunctions of exact one jump. For the general investigation, we introduce a concept `intensity' to formulate the growth of jumps under iteration and find a class of strictly monotone and upper semi-continuous multifunctions of intensity 1, called exclusive multifunctions, each of which has an absorbing interval. Then we use the absorbing interval to construct iterative roots of order $n$ for those exclusive multifunctions.
description: accepted in Journal of Difference Equations and Applications
Generalized Wigner crystallization in moiré materials
Creators: name: Padhi, Bikash
name: Chitra, R.
name: Phillips, Philip W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent experiments on the twisted transition metal dichalcogenide (TMD) material, $\rm WSe_2/WS_2$, have observed insulating states at fractional occupancy of the moiré bands. Such states were conceived as generalized Wigner crystals (GWCs). In this article, we investigate the problem of Wigner crystallization in the presence of an underlying (moiré) lattice. Based on the best estimates of the system parameters, we find a variety of homobilayer and heterobilayer TMDs to be excellent candidates for realizing GWCs. In particular, our analysis based on $r_{s}$ indicates that $\rm MoSe_{2}$ (among the homobilayers) and $\rm MoSe_2/WSe_2$ or $\rm MoS_2/ WS_2$ (among the heterobilayers) are the best candidates for realizing GWCs. We also establish that due to larger effective mass of the valence bands, in general, hole-crystals are easier to realize that electron-crystals as seen experimentally. For completeness, we show that satisfying the Mott criterion $n_{\rm Mott}^{1/2} a_{\ast} = 1$ requires densities nearly three orders of magnitude larger than the maximal density for GWC formation. This indicates that for the typical density of operation, HoM or HeM systems are far from the Mott insulating regime. These crystals realized on a moiré lattice, unlike the conventional Wigner crystals, are incompressible due the gap arising from pinning with the lattice. Finally, we capture this many-body gap by variationally renormalizing the dispersion of the vibration modes. We show these low-energy modes, arising from coupling of the WC with the moiré lattice, can be effectively modeled as a Sine-Gordon theory of fluctuations.
description: v1: 12 pages, 4 figures; v2: new refs added
Participación ciudadana como eje principal de la promoción cultural
Creators: name: Guamán_Córdova, Grace
Publisher: name: Zenodo
Year: 2021
Subjects: participación ciudadana
promoción cultural

description: La promoción cultural es un tema que lleva varios años en búsqueda de las mejores prácticas para su ejecución, tal es su impacto en la sociedad que se ha visto la necesidad de crear la Gestión Cultural como formadora de profesionales conocidos como promotores de cultura que puedan abarcar la pluralidad existente en la cultura, sin embargo, ninguna de las acciones que se pueda desarrollar son válidas si no se involucran a los diversos actores sociales, es decir, sin la participación ciudadana, no es posible que los procesos culturales traspasen más allá de las planificaciones plasmadas en los textos.
A Classical Treatment of Island Cosmology
Creators: name: Dutta, Sourish
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Computing the perturbation spectrum in the recently proposed Island Cosmology remains an open problem. In this paper we present a classical computation of the perturbations generated in this scenario by assuming that the NEC-violating field behaves as a classical phantom field. Using an exactly-solvable potential, we show that the model generates a scale-invariant spectrum of scalar perturbations, as well as a scale-invariant spectrum of gravitational waves. The scalar perturbations can have sufficient amplitude to seed cosmological structure, while the gravitational waves have a vastly diminished amplitude.
description: 8 pages, 1 figure
Explaining $g-2$ anomalies in two Higgs doublet model with vector-like leptons
Creators: name: Chun, Eung Jin
name: Mondal, Tanmoy
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the two Higgs doublet model (2HDM) along with a generation of vector-like lepton doublet and singlet to explain the observed discrepancies in the electron and muon anomalous magnetic moments. The type-X (lepton-specific) 2HDM can allow a light pseudo-scalar which is known to explain the muon anomalous magnetic moment at two-loop. Such a light particle induces a sizable negative contribution to the electron anomalous magnetic moment at one-loop in the presence of vector-like leptons evading all the experimental constraints.
description: v1: 20 pages, 5 figures. v2: matches the version to appear in JHEP
Interested in observing TrES-Her0-07621?
Creators: name: Creevey, O. L
name: Brown, T. M.
name: Jiménez-Reyes, S.
name: Belmonte, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: TrES-Her0-07621 is a recently discovered detached M Dwarf eclipsing binary system. We present some follow-up observations of this system including new minima times and a refined orbital period. We have also obtained better estimates of the stellar radii and inclination.
description: 3 pages
The orbital evolution of UFDs and GCs in an evolving Galactic potential
Creators: name: Armstrong, Benjamin M.
name: Bekki, Kenji
name: Ludlow, Aaron D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the second Gaia data release to investigate the kinematics of 17 ultra-faint dwarf galaxies (UFDs) and 154 globular clusters (GCs) in the Milky Way, focusing on the differences between static and evolving models of the Galactic potential. An evolving potential modifies a satellite's orbit relative to its static equivalent, though the difference is small compared to existing uncertainties on orbital parameters. We find that the UFD Boötes II is likely on its first passage around the Milky Way. Depending on the assumed mass of the Milky Way, the UFDs Triangulum II, Hydrus I, Coma Berenices, Draco II, and Ursa Major II, as well as the GC Pyxis, may also be on first infall so may be useful for constraining the mass of the Galaxy. We identify a clear kinematic distinction between metal-rich (${\rm [Fe/H]}>-1.1$) and metal-poor GCs (${\rm [Fe/H]}\leq-1.1$). Although most metal-rich clusters occupy predominately prograde orbits, with low eccentricities ($e\approx 0.35$) and similar specific angular momenta and orbital planes as the Galactic disc, 7 show potentially retrograde orbits, the origin of which is unclear. Metal-poor clusters have more diverse orbits, higher eccentricities ($e\approx 0.65$), and half have orbital planes offset from the disc by 60 to 120 degrees. The UFDs have similar $θ$ and $ϕ$ to the metal-poor GCs, suggesting a similar origin. We provide a catalogue of orbital parameters for UFDs and GCs for two different Galaxy masses and their observational uncertainties.
description: 23 pages, 12 figures, accepted for publication in MNRAS
title: Demonstration Project No. 59
title: The Use of Fly Ash in Highway Construction, Fayette County, Kentucky
titleType: Subtitle
Creators: name: Hunsucker, David Q.
name: Sharpe, Gary W.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: This report summarizes preliminary site investigations, design criteria and procedures, construction criteria and procedures, and results of initial and final evaluations of an experimental road base utilizing lime kiln dust, fly ash and aggregate. Observed performance has been satisfactory. Compressive strength evaluations indicate exceptional early strength and continued strength gain of the pozzolanic base. Back calculation of specific elastic layer moduli indicate that the moduli of the pozzolanic base material is most likely within a range of 500,000 to 1,000,000 psi.  Based upon observations to date, treated bases enhance overall pavement performance and their use should be continued. It is quite probable that pavement life may be extended at reduced costs.
A classical model for sub-Planckian thermal diffusivity in complex crystals
Creators: name: Wu, Huan-Kuang
name: Sau, Jay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Measurements of thermal diffusivity in several insulators have been shown to reach a Planckian bound on thermal transport that can be thought of as the limit of validity of semiclassical phonon scattering. Beyond this regime, the heat transport must be understood in terms of incoherent motion of the atoms under strongly anharmonic interactions. In this work, we propose a model for heat transport in a strongly anharmonic system where the thermal diffusivity can be lower than the Planckian thermal diffusivity bound. Similar to the materials which exhibit thermal diffusivity close to this bound, our scenario involves complex unit cell with incoherent intra-cell dynamics. We derive a general formalism to compute thermal conductivity in such cases with anharmonic intra-cell dynamics coupled to nearly harmonic inter-cell coupling. Through direct numerical simulation of the non-linear unit cell motion, we explicitly show that our model allows sub-Planckian thermal diffusivity. We find that the propagator of the acoustic phonons becomes incoherent throughout most of the Brillouin zone in this limit. We expect these features to apply to more realistic models of complex insulators showing sub-Planckian thermal diffusivity, suggesting a multi-species generalization of the thermal diffusivity bound that is similar to the viscosity bound in fluids.
description: 10 pages, 5 figures
Breakaway Timber Utility Pole Installations in Kentucky
Creators: name: Hughes, Ronald D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: This report describes the installation of ten breakaway timber utility poles in Lexington, Kentucky. Installations were made by Kentucky Utilities Company personnel and monitoring has been performed by Kentucky Transportation Center investigators. Retrofit hardware is described and locations of modified poles are detailed.  Modified poles have not been struck by vehicles to date. Monitoring will continue until September 1991 at which time a final report will be issued.