cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bound states of WIMP dark matter in Higgs-portal models. Part II. Thermal decoupling
Creators: name: Oncala, Ruben
name: Petraki, Kalliopi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Higgs doublet can mediate a long-range interaction between multi-TeV particles coupled to the Weak interactions of the Standard Model, while its emission can lead to very rapid bound-state formation processes and bound-to-bound transitions. Using the rates calculated in a companion paper, here we compute the thermal decoupling of multi-TeV WIMP dark matter coupled to the Higgs, and show that the formation of metastable dark matter bound states via Higgs-doublet emission and their decay decrease the relic density very significantly. This in turn implies that WIMP dark matter may be much heavier than previously anticipated, or conversely that for a given mass, the dark matter couplings to the Higgs may be much lower than previously predicted, thereby altering the dark matter phenomenology. While we focus on a minimal singlet-doublet model in the coannihilation regime, our calculations can be extended to larger multiplets where the effects under consideration are expected to be even more significant.
description: v1: 30 pages, 8 figures, 3 tables; v2: minor changes, published version
Multimode vibrational effects in single molecule conductance: A nonequilibrium Green's function approach
Creators: name: Härtle, R.
name: Benesch, C.
name: Thoss, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The role of multimode vibrational dynamics in electron transport through single molecule junctions is investigated. The study is based on a generic model, which describes charge transport through a single molecule that is attached to metal leads. To address vibrationally-coupled electron transport, we employ a nonequilibrium Green's function approach that extends a method recently proposed by Galperin et al. [Phys. Rev. B 73, 045314 (2006)] to multiple vibrational modes. The methodology is applied to two systems: a generic model with two vibrational degrees of freedom and benzenedibutanethiolate covalently bound to gold electrodes. The results show that the coupling to multiple vibrational modes can have a significant effect on the conductance of a molecular junction. In particular, we demonstrate the effect of electronically induced coupling between different vibrational modes and study nonequilibrium vibrational effects by calculating the current-induced excitation of vibrational modes.
description: 31 pages, 10 figures
Analyzing the Performance of Variational Quantum Factoring on a Superconducting Quantum Processor
Creators: name: Karamlou, Amir H.
name: Simon, William A.
name: Katabarwa, Amara
name: Scholten, Travis L.
name: Peropadre, Borja
name: Cao, Yudong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the near-term, hybrid quantum-classical algorithms hold great potential for outperforming classical approaches. Understanding how these two computing paradigms work in tandem is critical for identifying areas where such hybrid algorithms could provide a quantum advantage. In this work, we study a QAOA-based quantum optimization algorithm by implementing the Variational Quantum Factoring (VQF) algorithm. We execute experimental demonstrations using a superconducting quantum processor and investigate the trade-off between quantum resources (number of qubits and circuit depth) and the probability that a given biprime is successfully factored. In our experiments, the integers 1099551473989, 3127, and 6557 are factored with 3, 4, and 5 qubits, respectively, using a QAOA ansatz with up to 8 layers and we are able to identify the optimal number of circuit layers for a given instance to maximize success probability. Furthermore, we demonstrate the impact of different noise sources on the performance of QAOA and reveal the coherent error caused by the residual ZZ-coupling between qubits as a dominant source of error in the superconducting quantum processor.
Transcription of file 021_B (collection LA 256)
Creators: name: Parker, Verdena
name: Chase, Sara
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-221016-06: transcription of file 021_B from LA 256 (collection of recordings given to the Berkeley Language Center by Verdena), from 7:38 to 10:03. Due to re-numbering, tape 021_B has been assigned to the CLA item number LA256.021, audio file LA256.021B.
Particle Physics Approach to Dark Matter
Creators: name: Lazarides, George
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We review the main proposals of particle physics for the composition of the cold dark matter in the universe. Strong axion contribution to cold dark matter is not favored if the Peccei-Quinn field emerges with non-zero value at the end of inflation and the inflationary scale is superheavy since, under these circumstances, it leads to unacceptably large isocurvature perturbations. The lightest neutralino is the most popular candidate constituent of cold dark matter. Its relic abundance in the constrained minimal supersymmetric standard model can be reduced to acceptable values by pole annihilation of neutralinos or neutralino-stau coannihilation. Axinos can also contribute to cold dark matter provided that the reheat temperature is adequately low. Gravitinos can constitute the cold dark matter only in limited regions of the parameter space. We present a supersymmetric grand unified model leading to violation of Yukawa unification and, thus, allowing an acceptable b-quark mass within the constrained minimal supersymmetric standard model with mu>0. The model possesses a wide range of parameters consistent with the data on the cold dark matter abundance as well as other phenomenological constraints. Also, it leads to a new version of shifted hybrid inflation.
description: 32 pages including 6 figures, uses svmult.cls, some clarifications added, lectures given at the Third Aegean Summer School "The Invisible Universe: Dark Matter and Dark Energy", 26 September-1 October 2005, Karfas, Island of Chios, Greece (to appear in the proceedings)
Chow motives of twisted flag varieties
Creators: name: Calmes, B.
name: Petrov, V.
name: Semenov, N.
name: Zainoulline, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 57T15; 19E15

description: Let G be an adjoint simple algebraic group of inner type. We express the Chow motive (with integral coefficients) of some anisotropic projective G-homogeneous varieties in terms of motives of simpler G-homogeneous varieties, namely, those that correspond to maximal parabolic subgroups of G. We decompose the motive of a generalized Severi-Brauer variety SB_2(A), where A is a division algebra of degree 5, into a direct sum of two indecomposable motives. As an application we provide another counter-example to the uniqueness of a direct sum decomposition in the category of motives with integral coefficients.
description: 28 pages
Orbital ordering in La$_{0.5}$Sr$_{1.5}$MnO$_4$ studied by model Hartree-Fock calculation
Creators: name: Ebata, K.
name: Mizokawa, T.
name: Fujimori, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated orbital ordering in the half-doped manganite La$_{0.5}$Sr$_{1.5}$MnO$_4$, which displays spin, charge and orbital ordering, by means of unrestricted Hartree-Fock calculations on the multiband $p$-$d$ model. From recent experiment, it has become clear that La$_{0.5}$Sr$_{1.5}$MnO$_4$ exhibits a cross-type $(z^2-x^2/y^2-z^2)$ orbital ordering rather than the widely believed rod-type $(3x^2-r^2/3y^2-r^2)$ orbital ordering. The calculation reveals that cross-type $(z^2-x^2/y^2-z^2)$ orbital ordering results from an effect of in-plane distortion as well as from the relatively long out-of-plane Mn-O distance. For the "Mn$^{4+}$" site, it is shown that the elongation along the c-axis of the MnO$_6$ octahedra leads to an anisotropic charge distribution rather than the isotropic one.
description: 4 pages, 5 figures
Outcomes of palatometry therapy as perceived by untrained listeners
Creators: name: Williams, Rhea Joy
Publisher: name: University of British Columbia
Year: 2009

description: The goal of this study was to determine the effectiveness of speech therapy using palatometry on activity limitation (World Health Organization [WHO], 1997) for speakers with speech impairments. Prior to this study, three adults and four children received a course of therapy using the palatometer. All of the speakers had previously plateaued in their improvement using traditional speech therapy techniques. Following approximately 20 sessions using the palatometer, narrow phonetic transcriptions showed notable gains in phonetic accuracy. Post-therapy palatograms showed approximations which were considered closer to normal than pre-therapy productions. The transcriptions and palatograms provide indices of impairment (WHO, 1997). Specifically, accuracy of phoneme production is measured. However, the question of whether or not the gains resulting from therapy reduce activity limitation remain unaddressed by such measures. The speakers' own perceptions of improvement were one indication that reduction in activity limitation was an outcome of therapy. To assess effects on activity limitations, sixteen untrained listeners (who were unfamiliar with disordered speech) were asked to perform two tasks. The first, a judgment task, involved choosing which of two sentences (one pre-therapy and one post-therapy) was "easier to understand." The second was an identification task with two parts. Listeners orthographically transcribed a set of ten words which contained in total seven to ten phonemes that had been targeted in therapy. They also transcribed three sentences. These tasks were performed by the listeners for each of the seven original speakers. Word transcription and goal phoneme identification within the word transcription by the untrained listeners improved significantly for five of seven of the speakers involved in therapy. An improvement between 11% and 30% in word identification and goal phoneme identification appeared to result in untrained listeners judging post-therapy samples as "easier to understand" in the judgment task. In general, the untrained listeners were least successful in noting improvement for adults with mild speech disorders. Speakers with mild impairments whose initial intelligibility was high (i.e., 90% or better) seem to require greater improvement than speakers with severe impairments, if gains are to be noticed by the untrained listener. The perception of untrained listeners in this study indicated that palatometry therapy provided an effective method of reducing limitations on the activity of producing intelligible speech for speakers with a variety of speech disorders.
Host galaxy and orientation differences between AGN different types
Creators: name: Gkini, Anamaria
name: Plionis, Manolis
name: Chira, Maria
name: Koulouridis, Elias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims.The main purpose of this study is to investigate aspects regarding the validity of the active galactic nucleus (AGN) unification paradigm (UP). In particular, we focus on the AGN host galaxies, which according to the UP should show no systematic differences depending on the AGN classification. Methods.For the purpose of this study, we used (a) the spectroscopic Sloan Digital Sky Survey (SDSS) Data Release (DR) 14 catalogue, in order to select and classify AGNs using emission line diagnostics, up to a redshift of z=0.2, and (b) the Galaxy Zoo Project catalogue, which classifies SDSS galaxies in two broad Hubble types: spirals and ellipticals. Results.We find that the fraction of type 1 Seyfert nuclei (Sy1) hosted in elliptical galaxies is significantly larger than the corresponding fraction of any other AGN type, while there is a gradient of increasing spiral-hosts from Sy1 to LINER, type 2 Seyferts (Sy2) and composite nuclei. These findings cannot be interpreted within the simple unified model, but possibly by a co-evolution scheme for supermassive black holes (SMBH) and galactic bulges. Furthermore, for the case of spiral host galaxies we find the Sy1 population to be strongly skewed towards face-on configurations, while the corresponding Sy2 population range in all host galaxy orientation configurations has a similar, but not identical, orientation distribution to star-forming (SF) galaxies. These results also cannot be interpreted by the standard unification paradigm, but point towards a significant contribution of the galactic disc to the obscuration of the nuclear region. This is also consistent with the observed preference of Sy1 nuclei to be hosted by ellipticals, that is, the dusty disc of spiral hosts contributes to the obscuration of the broad-line region (BLR), and thus relatively more ellipticals are expected to appear hosting Sy1 nuclei.
description: Accepted for publication in A&A
Electrostatic inactivation of RNA viruses at air-water and liquid-liquid interfaces
Creators: name: Brackley, C. A.
name: Lips, A.
name: Morozov, A.
name: Poon, W. C. K.
name: Marenduzzo, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Understanding the interactions between viruses and surfaces or interfaces is important, as they provide the principles underpinning the cleaning and disinfection of contaminated surfaces. Yet, the physics of such interactions is currently poorly understood. For instance, there are longstanding experimental observations suggesting that the presence of air-water interfaces can generically inactivate and kill viruses, yet the mechanism underlying this phenomenon remains unknown. Here we use theory and simulations to show that electrostatics provides one such mechanism, and that this is very general. Thus, we predict that the free energy of an RNA virus should increase by several thousands of $k_BT$ as the virion breaches an air-water interface. We also show that the fate of a virus approaching a generic liquid-liquid interface depends strongly on the detailed balance between interfacial and electrostatic forces, which can be tuned, for instance, by choosing different media to contact a virus-laden respiratory droplet. We propose that these results can be used to design effective strategies for surface disinfection. Intriguingly, tunability requires electrostatic and interfacial forces to scale similarly with viral size, which naturally occurs when charges are arranged in a double-shell distribution as in RNA viruses like influenza and all coronaviruses.
description: 10 pages, 5 figures; minor corrections to the Appendix
Fragile Pluralism
Creators: name: Soeffner, Hans-Georg
Publisher: name: Ruhr-Universität Bochum
Year: 2016
Subjects: Pluralism (ethnic, religious, cultural); first and second order constructions of meaning; pluralistic societies; intercultural translation; maxims for communication; ethnocentrism; identity formation; immigration society

description: This essay first appeared in German in Magdalena Tzaneva, ed. Nachtflug der Eule: 150 Stimmen zum Werk von Niklas Luhmann. Gedenkbuch zum 15. Todestag von Niklas Luhmann (8. Dezember 1927 Lüneburg – 6. November 1998 Oerlinghausen). Berlin: LiDi EuropEdition (2013), 73–100.
A shorter version of the essay was published in Hans-Georg Soeffner, and Thea D. Boldt, eds. Fragiler Pluralismus, Wiesbaden: VS Springer (2014), 207–24.

The present translation for Entangled Religions – Interdisciplinary Journal for the Study of Religious Contact and Transfer is by Nicola Morris.

The article describes the emergence of pluralism within the process of globalization and the impact of this development upon individuals communication and the definitions of the ‘self’ and the ‘Other’. The author illustrates the pitfalls of the human tendency to view the world from an ethnocentric perspective and with the corresponding attitude. He argues that in ‘open societies’, successful citizens will be capable of recognising and articulating distinctions between individuals, as well as between groups, beliefs, lifestyles and attitudes. These citizens must also be aware and capable of adapting for their purposes the full repertoire of language games and role games in their social world, in order to perceive and utilise comprehensive systems such as frameworks for cooperation. These skills will help them implement ‘maxims of communication’ and ‘existential hypotheses’.
description: Entangled Religions, Vol 3 (2016)
Long-range fluctuation-induced forces in driven electrolytes
Creators: name: Mahdisoltani, Saeed
name: Golestanian, Ramin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study the stochastic dynamics of an electrolyte driven by a uniform external electric field and show that it exhibits generic scale invariance despite the presence of Debye screening. The resulting long-range correlations give rise to a Casimir-like fluctuation-induced force between neutral boundaries that confine the ions; this force is controlled by the external electric field, and it can be both attractive and repulsive with similar boundary conditions, unlike other long-range fluctuation-induced forces. This work highlights the importance of nonequilibrium correlations in electrolytes and shows how they can be used to tune interactions between uncharged biological or synthetic structures at large separations.
description: To appear in Phys Rev Lett
Aaron J. Ghiloni (ed.): World Religions and Their Missions
Creators: name: Roggema, Barbara
Publisher: name: Ruhr-Universität Bochum
Year: 2016

description: This contribution offers a review of

Aaron J. Ghiloni (ed.): World Religions and Their Missions.

New York: Peter Lang, 2015. 349 pages, €80.60, ISBN 978-1-4331-2284-2 (hardcover)/ISBN 978-1-4539-1419-9 (e-book)
description: Entangled Religions, Vol 3 (2016)
X-ray Absorption Line Spectroscopy of the Galactic Hot Interstellar Medium
Creators: name: Yao, Yangsen
name: Wang, Q. Daniel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an X-ray absorption line spectroscopic study of the large-scale hot interstellar medium (HISM) in the Galaxy. We detect Ne IX K$_α$ absorption lines in the {\sl Chandra} grating spectra of seven Galactic low-mass X-ray binaries. Three of these sources also show absorption of O VII K$_α$, O VII K$_β$, and/or O VIII K$_α$. Both centroid and width of the lines are consistent with a Galactic HISM origin of the absorption. By jointly fitting the multiple lines, accounting for line saturation and assuming the collisional ionization equilibrium, we estimate the average absorbing gas temperature as $\sim 2.4\pm0.3\times10^6$ K (90% confidence errors). We further characterize the spatial density distribution of the gas as ${\rm 6.4_{-1.7}^{+2.4} exp(-|z|/1.2_{-0.5}^{+1.0} kpc) \times10^{-3}{\rm cm^{-3}}} $ (a disk morphology) or ${\rm 6.2_{-2.1}^{+3.8} [ 1 + (R/2.3_{-1.1}^{+1.6} kpc)^2]^{-1} \times10^{-3} {\rm cm^{-3}}}$ (a sphere morphology), where $z$ and $R$ are the distances from the Galactic plane and Galactic center (GC) respectively. Since nearly all the sight-lines with significant absorption lines detected are somewhat toward GC and at low Galactic latitudes, these results could be severely biased. More observations toward off-GC sight-lines and at high latitudes are urgently needed to further the study. Nevertheless, the results demonstrate the excellent potential of X-ray absorption line spectroscopy in the study of the HISM.
description: 29 pages, 9 figures, 5 tables, ApJ accepted, 2005 June 1, v625, 2 issue
Anomalous Diffusion in a Bench-Scale Pulsed Fluidized Bed
Creators: name: Higham, Jonathan E.
name: Shahnam, Mehrdad
name: Vaidheeswaran, Avinash
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present our analysis on micro-rheology of a bench-scale pulsed fluidized bed, which represents a weakly confined system. Non-linear gas-particle and particle-particle interactions resulting from pulsed flow are associated with harmonic and sub-harmonic modes. While periodic structured bubble patterns are observed at the meso-scale, particle-scale measurements reveal anomolous diffusion in the driven granular medium. We use single-particle tracks to analyze ergodicity and ageing properties at two pulsing frequencies having remarkably different meso-scale features. The scaling of ensemble-averaged mean squared displacement is not unique. The distribution of time-averaged mean squared displacements is non-Gaussian, asymmetric and has a finite trivial contribution from particles in crowded quasi-static surroundings. Results indicate weak ergodicity breaking which along with ageing characterize the non-stationary and out-of-equilibrium dynamics.
description: 18 pages, 9 figures
On the K-theory of the coordinate axes in the plane
Creators: name: Hesselholt, Lars
Publisher: name: arXiv
Year: 2005
Subjects: subject: Number Theory (math.NT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: Let k be a regular F_p-algebra, let A = k[x,y]/(xy) be the coordinate ring of the coordinate axes in the affine k-plane, and let I = (x,y) be the ideal that defines the intersection point. We evaluate the relative K-groups K_q(A,I) in terms of the groups of big de Rham-Witt forms of the ring k. The result generalizes previous results for K_1 and K_2 by Dennis and Krusemeyer.
Interacting Dark Energy and Cosmological Equations of State
Creators: name: Zimdahl, Winfried
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Interactions within the cosmic medium modify its equation of state. We discuss implications of interacting dark energy models both for the spatially homogenous background and for the perturbation dynamics.
description: 9 pages, to appear in the December 2005 special issue of Int.J.Mod.Phys.D
First-principles study of ultrafast and nonlinear optical properties of graphite thin films
Creators: name: Uemoto, Mitsuharu
name: Kurata, Shintaro
name: Kawaguchi, Norihito
name: Yabana, Kazuhiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically investigate ultrafast and nonlinear optical properties of graphite thin films based on first-principles time-dependent density functional theory. We first calculate electron dynamics in a unit cell of graphite under a strong pulsed electric field and explore the transient optical properties of graphite. It is shown that the optical response of graphite shows a sudden change from conducting to insulating phase at a certain intensity range of the applied electric field. It also appears as a saturable absorption, the saturation in the energy transfer from the electric field to electrons. We next investigate a light propagation in graphite thin films by solving coupled dynamics of the electrons and the electromagnetic fields simultaneously. It is observed that the saturable absorption manifests in the propagation with small attenuation in the spatial region where the electric field amplitude is about $4 \sim 7 \times 10^{-2}$ V/Angstrom.
description: 14 pages, 12 figures
Spatial Shift-Share Analysis of the Leisure and Hospitality Sector on the Gulf Coast following Hurricane Katrina
Creators: name: Evans, Garen K.
name: Evans, Garen K.
Publisher: name: Unknown
Year: 2008
Subjects: Labor and Human Capital
Research Methods/ Statistical Methods

description: Employment shifts in the Leisure and Hospitality sector along the Gulf coast following Hurricane Katrina were explored using spatial shift-share analysis. Using a spatial weights matrix that incorporated relative employment, and distance measures relative to the track of the storm we calculated classical and spatial shift-share components. Each of the spatial components then was regressed on net employment change, and the results were statistically significant, and similar to results obtained by Marquez and Ramajo (2005). These results suggest that spatial interaction between employment centers as well as with the storm track, was a relevant aspect of the employment shifts that occurred following Hurricane Katrina.
Universal Features of Annealing and Aging in Compaction of Granular Piles
Creators: name: Gago, Paula A.
name: Boettcher, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We explore the compaction dynamics of a granular pile after a hard quench from a liquid into the glassy regime. First, we establish that the otherwise athermal granular pile during tapping exhibits annealing behavior comparable to glassy polymer or colloidal systems. Like those other systems, the pile undergoes a glass transition and "freezes" into different non-equilibrium glassy states at low agitation for different annealing speeds, starting from the same initial equilibrium state at high agitation. Then, we quench the system instantaneously from the highly-agitated state to below the glass transition regime to study the ensuing aging dynamics. In this classical aging protocol, the density increases (i.e., the potential energy of the pile decreases) logarithmically over several decades in time. Instead of system-wide, thermodynamic measures, here we identify the intermittent, irreversible events ("quakes") that actually drive the glassy relaxation process. We find that the event rate decelerates hyperbolically, which explains the observed increase in density when the integrated contribution to the downward displacements is evaluated. We argue that such a hyperbolically decelerating event rate is consistent with a log-Poisson process, also found as a universal feature of aging in many thermal glasses.
description: 5 pages (RevTex4) + 3 pages Supplementary Material (pdf), 5 figures (eps). Updated Supplement and added mp4-animation. Related information can be found at http://www.physics.emory.edu/faculty/boettcher/
The impact of Brexit on UK food standards and food security: perspectives of the repositioning of neoliberal food policy
Creators: name: Lingham, Sophia
name: Kowalska, Aleksandra
name: kowalski, Jaroslaw
name: Manning, Louise
name: Maye, Damian
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 380199
subject: Applied economics not elsewhere classified

description: Brexit, the exiting of the United Kingdom (UK) from the European Union (EU), has impacted socio-political relationships, both internally, and externally with other countries and economic groups. This has been especially true regarding international trade, and legal and market standards for food and food security. This paper examines how the enacting of Brexit has framed and underlined contemporary perceptions of the UK neoliberal food system, the relative importance of food standards, and the impact of policy transition on food security. Using a positional approach, perspectives and narratives within the literature are critiqued and synthesized, including academic sources, parliamentary debates, economic reports, and media analysis. The politico-economic effects of Brexit have altered food-related relationships, recalibrating trade interactions and changing the public funding that UK farmers receive. Through realigning extractive economic models, the pre-Brexit UK food system has been reset, and new perspectives about neoliberalism have emerged. Government intervention has steered away from traditional neoliberal framings towards neo-developmentalism. A dichotomy thus exists between recognizing the intrinsic right to adequate and nutritious food and maintaining existing cultural dynamics of food supply, and the use of agri-food policy as a politico-economic tool to drive higher economic growth. The implications of this policy change are stark for UK agri-food actors within food system transition post-Brexit.
Mixed Unit Roots and Deterministic Trends in Noncausality Tests
Creators: name: Ran, Tao
name: Zapata, Hector O.
name: Ran, Tao
name: Zapata, Hector O.
Publisher: name: Unknown
Year: 2008
Subjects: Research Methods/ Statistical Methods

description: Using Japanese economic data and a Monte Carlo simulation, this study analyzes the consequences of ignoring deterministic trends in mixed unit-root data for Granger noncausality tests. Results from an augmented VAR suggest over-rejection in certain empirically relevant cases at various sample sizes.
Measuring the Three Point Correlation Function of the Cosmic Microwave Background
Creators: name: Chen, Gang
name: Szapudi, Istvan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new method to estimate three-point correlations in Cosmic Microwave Background maps. Our Fast Fourier Transform based implementation estimates three-point functions using all possible configurations (triangles) at a controlled resolution. The speed of the technique depends both on the resolution and the total number of pixels $N$. The resulting $N\log N$ scaling is substantially faster than naive methods with prohibitive $N^3$ scaling. As an initial application, we measure three-point correlation functions in the First Year Data Release of the Wilkinson Anisotropy Probe. We estimate 336 cross-correlations of any triplet of maps from the 8 differential assemblies, scanning altogether 2.6 million triangular configurations. Estimating covariances from Gaussian signal plus realistic noise simulations, we perform a null-hypothesis testing with regards to the Gaussianity of the Cosmic Microwave Background. Our main result is that at the three-point level WMAP is fully consistent with Gaussianity. To quantify the level of possible deviations, we introduce false discovery rate analysis, a novel statistical technique to analyze for three-point measurements. This confirms that the data are consistent with Gaussianity at better than 1-$σ$ level when jointly considering all configurations. We constrain a specific non-Gaussian model using the quadratic approximation of weak non-Gaussianities in terms of the $f_{NLT}$ parameter, for which we construct an estimator from the the three-point function. We find that using the skewness alone is more constraining than a heuristic suboptimal combination of all our results; our best estimate is $f_{NLT} = -110\pm 150$ assuming a $Λ$CDM concordance model.
description: 20 pages, 5 figures
The Organizational Evolution of Markets for Wood Products in the Southern United States
Creators: name: Dunn, Michael A.
name: Barnes, James N.
name: Dunn, Michael A.
name: Barnes, James N.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Industrial Organization
subject: Research Methods/ Statistical Methods
subject: Industry Evolution
subject: Contracting
subject: Property Rights
subject: Vertical Integration
subject: Forest Products

description: This paper represents the first case study attempt to develop a transaction cost conceptual model to describe industry evolution of the paper and lumber industries in the Southern United States around the late 1800s and early 1900s. We use transaction cost theory to explain the co-evolution of markets for wood products noting that variation in the level and type of investments made in physical and human capital assets needed to manage paper and lumber miller operations had a significant influence on the use of wood dealer systems compared to more vertically organized business arrangements. We identify some testable hypotheses and areas of future research.
X-Ray Emission and Optical Polarization of V1432 Aquilae: An Asynchronous Polar
Creators: name: Rana, V. R.
name: Singh, K. P.
name: Barrett, P. E.
name: Buckley, D. A. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A detailed analysis of X-ray data from ROSAT, ASCA, XMM and RXTE for the asynchronous polar V1432 Aql along with Stokes polarimetry data from SAAO, is presented. Power spectra from long-baseline ROSAT data show a spin period of 12150s along with several system related frequency components. However, the second harmonic of the spin period dominates power spectrum in the XMM data. For the optical circular polarization, the dominant period corresponds to half the spin period. The ROSAT data can be explained as due to accretion onto two hot spots that are not anti-podal. The variations seen in the optical polarization and the ASCA and XMM data suggest the presence of at least three accretion foot prints on the white dwarf surface. Two spectral models, a multi-temperature plasma and a photo-ionized plasma model, are used for spectral study. The RXTE PCA data are used to constrain the white dwarf mass to 1.2$\pm$0.1 M_odot using the multi-temperature plasma model. A strong soft X-ray excess (<0.8 keV) in the XMM MOS data is well modeled by a blackbody component having a temperature of 80-90 eV. The plasma emission lines seen at 6.7 and 7.0 keV are well fitted using the multi-temperature plasma model, however an additional Gaussian is needed for the 6.4 keV line. The multi-temperature plasma model requires a homogeneous absorber fully covering the source and a partial absorber covering 65% of the source. The photo-ionized plasma model, with a range of Fe column densities, gives a slightly better overall fit and fits all emission lines. The presence of a strong blackbody component, a spin period of 12150s, modulation of the 6.4 keV line flux with spin period, and a very hard X-ray component suggest that V1432 Aql is a polar with X-ray spectral properties similar to that of a soft intermediate polar.
description: 46 pages, including 13 figures and 4 tables, To appear in The Astrophysical Journal, 20 May 2005 issue, vol. 625, Added Report-no and Journal-ref, no change in the text of the paper
Dark Energy Constraints from the CTIO Lensing Survey
Creators: name: Jarvis, Mike
name: Jain, Bhuvnesh
name: Bernstein, Gary
name: Dolney, Derek
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform a cosmological parameter analysis of the 75 square degree CTIO lensing survey in conjunction with CMB and Type Ia supernovae data. For Lambda CDM cosmologies, we find that the amplitude of the power spectrum at low redshift is given by sigma_8 = 0.81 (+0.15,-0.10, 95% c.l.), where the error bar includes both statistical and systematic errors. The total of all systematic errors is smaller than the statistical errors, but they do make up a significant fraction of the error budget. We find that weak lensing improves the constraints on dark energy as well. The (constant) dark energy equation of state parameter, w, is measured to be -0.89 (+0.16,-0.21, 95% c.l.). Marginalizing over a constant $w$ slightly changes the estimate of sigma_8 to 0.79 (+0.17, -0.14, 95% c.l.). We also investigate variable w cosmologies, but find that the constraints weaken considerably; the next generation surveys are needed to obtain meaningful constraints on the possible time evolution of dark energy.
description: 10 pages, 4 figures, v3 matches version accepted by ApJ. Significant changes in section 4.2.3. Otherwise, mostly minor changes
US Consumers' Willingness to Pay for Wool Product Attributes
Creators: name: Peterson, Hikaru Hanawa
name: Hustvedt, Gwendolyn
name: Chen, Yun-Ju (Kelly)
name: Peterson, Hikaru Hanawa
name: Hustvedt, Gwendolyn
name: Chen, Yun-Ju (Kelly)
Publisher: name: Unknown
Year: 2008
Subjects: Demand and Price Analysis

description: Choice experiments were conducted to assess US consumer demand for woolproduct attributes. The average consumer's WTP was higher for US wool gloves compared to acrylic gloves. For Australian wool gloves, WTP was lower if consumers read information on husbandry practices. Demand for attributes varied across socioeconomic and psychographic characteristics.
Analysis of United States and European Union Import Demand for Shrimp
Creators: name: Poudel, Pawan
name: Keithly, Walter R.
name: Poudel, Pawan
name: Keithly, Walter R.
Publisher: name: Unknown
Year: 2008
Subjects: Demand and Price Analysis

description: Based on 1990-2004 quarterly data, U.S. and E.U. demand for imported shrimp by alternative supply sources was examined within an Almost Ideal Demand System framework. For the United States, supply sources included Central America, South America, and Asia. Supply sources for the European Union included Asia, South America, and Rest of World. All own-price elasticities for the U.S. system were found to be elastic while all own-price elasticities associated with the E.U. system were found to be inelastic. With few notable exceptions, estimated cross-price elasticities suggest substitution among import sources. Finally, shrimp of Asian origin were found to be highly expenditure elastic in the US market while shrimp of South American origin were found to be the same in the European market.
Direct phase modulation via optical injection: theoretical study
Creators: name: Shakhovoy, Roman
name: Puplauskis, Marius
name: Sharoglazova, Violetta
name: Duplinskiy, Alexander
name: Zavodilenko, Vladimir
name: Losev, Anton
name: Kurochkin, Yury
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Direct phase modulation via optical injection is a newly developed method for coding the phase of a gain-switched laser, which meets high requirements placed on transmitters for quantum key distribution: compactness, low losses, compatibility with CMOS technologies, and the absence of undesirable effects leading to the side-channel information leakage. Despite the successful implementation and good prospects for the further development of this system, there is still a lack of theoretical investigations of this scheme in the literature. Here, for the first time, we perform its theoretical analysis. We study the influence of the spontaneous emission noise, examine the role of the gain non-linearity and consider the effect of the temperature drift. The results obtained reveal that these phenomena significantly affect the system performance. We have tried to formulate here practical instructions, which will help to take these features into account when elaborating and employing the optical-injection-based phase modulator.
Braided Hopf Algebras
Creators: name: Zhang, Shouchuan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16W30

description: In braided tensor categories we show the Maschke's theorem and give the necessary and sufficient conditions for double cross biproducts and crossbiproducts and biproducts to be bialgebras. We obtain the factorization theorem for braided Hopf algebras; In symmetric tensor categories, we show the duality theorem and construct quantum double; In ordinary vector space category with ordinary twist, we obtain the relation between the global dimension, the weak dimension, the Jacbson radical, Baer radical of algebra $R$ and its crossed product $R #_σH$. We also give the relation between the decompositions of comodules and coalgebras. We classify quiver Hopf algebras. We obtain all solutions of constant classical Yang-Baxter equation (CYBE) in Lie algebra $L$ with dim $L \le 3$. We also give the sufficient and necessary conditions for $(L, \hbox {[ ]}, Δ_r, r)$ to be a coboundary (or triangular) Lie bialgebra.
description: 318pages
Small town growth management planning for socially sustainable change in Pemberton, British Columbia
Creators: name: Wilson, Rima Lee
Publisher: name: University of British Columbia
Year: 2009

description: Using the community of Pemberton, BC, as a case study, this thesis explores the impacts of rapid growth and growth management on social conditions and long-term social well-being in small towns. In recent years, rapid growth in Pemberton has had a significant impact on social and economic conditions in the community. Yet with little attention in the literature to small town growth management, or to the relationship between growth management and social sustainability, the community has little guidance in planning for sustainable change. Employing both primary and secondary research methods (including key informant interviews, a review of the relevant literature, and analyses of related reports, government publications, and survey results), this analysis is intended to contribute to the general body of knowledge about rural growth management planning, and to the community's efforts to sensitively and sustainably manage its growth. In so doing, the study first establishes the theoretical context by considering the history and dimensions of growth management, and by exploring the concept of social sustainability and its relationship to growth management planning. Subsequently, in examining a number of areas of social and economic change in Pemberton (the economic base, the balance of residential and economic growth, housing affordability, town character, and community amenities), this study explores the impacts of growth on equity, social capital, and quality of life in the community, and offers the following lessons for sustainable growth management in other small towns. First, it demonstrates the ways in which growth can impact local social conditions, and the opportunities and constraints it presents for the preservation of social sustainability in the future. Furthermore, it illustrates the importance of considering the regional context in the design of growth management policies and incorporating an informed public into planning processes. Most importantly, this analysis reveals the ways in which a comprehensive and proactive growth management strategy which embodies community values and priorities can improve the likelihood that a community's long-term social well-being is preserved in the face of change.
Enhancing vibrational light-matter coupling strength beyond the molecular concentration limit using plasmonic arrays
Creators: name: Hertzog, Manuel
name: Munkhbat, Battulga
name: Baranov, Denis G.
name: Shegai, Timur O.
name: Börjesson, Karl
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Vibrational strong coupling is emerging as a promising tool to modify molecular properties, by making use of hybrid light-matter states known as polaritons. Fabry-Perot cavities filled with organic molecules are typically used, and the molecular concentration limits the maximum reachable coupling strength. Developing methods to increase the coupling strength beyond the molecular concentration limit are highly desirable. In this letter, we investigate the effect of adding a gold nanorod array into a cavity containing pure organic molecules, using FT-IR microscopy and numerical modeling. Incorporation of the plasmonic nanorod array, that acts as artificial molecules, leads to an order of magnitude increase in the total coupling strength for the cavity filled with organic molecules. Additionally, we observe a significant narrowing of the plasmon linewidth inside the cavity. We anticipate that these results will be a step forward in exploring vibropolaritonic chemistry and may be used in plasmon based bio-sensors.
Consumer Purchasing Behavior in Response to Media Coverage of Avian Influenza
Creators: name: Beach, Robert H.
name: Zhen, Chen
name: Beach, Robert H.
name: Zhen, Chen
Publisher: name: Unknown
Year: 2008
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Research Methods/ Statistical Methods
subject: Avian influenza
subject: food safety
subject: Italy
subject: meat demand
subject: media index

description: Understanding consumer response to food safety information is important for quantifying consumer response to food safety events, predicting market impacts, and developing appropriate risk communication strategies. In this study, we present a methodology for analysis of consumer response to media coverage of avian influenza and an application using Italian data.
Quantum cloning of identical mixed qubits
Creators: name: Fan, H.
name: Liu, B. Y.
name: Shi, K. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum cloning of two identical mixed qubits $ρ\otimes ρ$ is studied. We propose the quantum cloning transformations not only for the triplet (symmetric) states but also for the singlet (antisymmetric) state. We can copy these two identical mixed qubits to M (M>2) copies. This quantum cloning machine is optimal in the sense that the shrinking factor between the input and the output single qubit achieves the upper bound. The result shows that we can copy two identical mixed qubits with the same quality as that of two identical pure states.
description: 4 pages,references added
Consumers and the Evolution of New Markets: The Case of the Ethical Foods
Creators: name: Amanor-Boadu, Vincent
name: Schnitz, Casey
name: Amanor-Boadu, Vincent
name: Schnitz, Casey
Publisher: name: Unknown
Year: 2008
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Institutional and Behavioral Economics
subject: Ethical consumers
subject: New Markets
subject: Consumer choice

description: Changes in consumer preferences have frequently created new markets for new products. This paper explores the antecedents of the changes in consumer preferences and the factors influencing the evolution of niche markets into commodity markets and its speed. The results show that the more embedded characteristics products have and more consumption is driven by attitude, the longer products are able to maintain their uniqueness and the slower their evolution to commodities.