cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
SEMIOTICS OF URBAN SPACE AS A LINE OF ANTHROPOLOGICAL DEFENSE
Creators: name: Korzeniowska-Bihun, Anna
Publisher: name: Wiedza Obronna
Year: 2023

description: The paper explores the intricate relationship between semiotics, urban spaces, and anthropological defense in the context of Ukraine. The term "semiotics" refers to the study of signs and symbols and their interpretation, while the term "anthropological defense" suggests the safeguarding of cultural identity and human values. Urban space serves as a critical arena for the manifestation of cultural symbols, ideologies, and collective identity. The study aims to dissect how these elements are embedded in the urban landscape and how they contribute to the defense and preservation of the anthropological essence of a community, particularly in the Ukrainian context.
description: Wiedza Obronna, Tom 285 Nr 4 (2023)
GENOCIDE VOCABULARY IN THE  NEWSPAPER  "DAILY STAR"
Creators: name: Nomozova, Farangiz
Publisher: name: Zenodo
Year: 2024

description: The term "genocide" has entered into practice since 1944. It is a very specific term, referring to violent and brutal crimes committed against groups of people or nations with an aim to eliminate and abolish them. In 1944, it is Polish Jewish lawyer Raphael Lemkin who made up the term genocide in his book documenting Nazi policies of systematically destroying European Jews (ushmm.org). Afterwards, the term “genocide” has had great influence on all the spheres of life, psychology, national identity and of course linguistic thinking (Gasparyan 2014:27).
India’s water future to 2025-2050: business-as-usual scenario and deviations
Creators: name: Amarasinghe, Upali A.
name: Shah, Tushaar
name: Turral, Hugh
name: Anand, B.K.
name: Amarasinghe, Upali A.
name: Shah, Tushaar
name: Turral, Hugh
name: Anand, B.K.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Resource /Energy Economics and Policy
subject: Water demand
subject: Water supply
subject: Population growth
subject: Crop production
subject: Crop yield
subject: Groundwater
subject: irrigation
subject: Food security

description: With a rapidly expanding economy many changes are taking place in India today. The business-as-usual (BAU) scenario, which assumes the continuation of current trends of key water demand drivers, will meet the future food demand. However, it leads to a severe regional water crisis by 2050, where many river basins will reach closure, will be physically water-scarce and will have regions with severely overexploited groundwater resources. While the alternative scenarios of water demand show both optimistic and pessimistic water futures, the scenario with additional productivity growth is the most optimistic, with significant scope for reducing future water demand.
European Smart City Politics - Conception, Perception and Lived Experience in the cases of the EU, Amsterdam and Barcelona
Creators: name: Mangalousi, Dafni
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: Critical smart cities literature has called for further research on the discursive and material realities of smart cities (Kitchin, 2015) in order to politicise them as a research topic under a right to the smart city framework (Kitchin et al., 2018). Towards this research agenda, this thesis develops an integrated discursive-material framework for understanding the ‘smart city’. The understanding of the material component highly relies on Henri Lefebvre’s (1974) theory of the production space, and his triad model of socio-spatial processes: conceived space, perceived space; and lived space. The discursive component relies on Ernesto Laclau and Chantal Mouffe’s (1985) theory of hegemony, with however the incorporation of Doreen Massey’s (1995; 2005) constructive critique on the spatial understanding of politics that has influenced Mouffe’s (2013a; 2013b) later work on the politics of agonism. Upon its development, the integrated framework is operationalised to approach European spatial politics case studying the regional level of the EU and the city levels of Amsterdam and Barcelona. The analysis of the three case studies is performed through the political discourse analysis of documents and websites and ethnography in place of relevant events. Thereof, the findings of this thesis are gathered into a conceptual model for understanding the discursive-material realities of smart cities that suggests four non-mutually exclusive smart cities imaginaries currently at play: (a) the corporate smart city; (b) the panopticon smart city; (c) the smart city mediator and (d) the empowering smart city. Finally, this thesis recommends that future scholarship further engages with the conceptualisation of technology as space, the development of a radical understanding of citizenship towards the imagination a right to the smart city framework and activist methodologies towards its realisation.
The creation of dominant firm market power in the coconut oil export market
Creators: name: Buschena, David E.
name: Perloff, Jeffrey M.
name: Buschena, David E.
name: Perloff, Jeffrey M.
Publisher: name: Unknown
Year: 1990
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Crop Production/Industries
subject: International Relations/Trade
subject: export marketing
subject: supply and demand

description: Legal and institutional changes that centralized control of the Philippine coconut oil refining and exporting industries enabled the Philippines to exercise some of its potential dominant-firm market power. If the elasticity of demand for coconut oil continues to increase. in part due to concerns about the health risks from eating saturated fats. Philippine exports will increase slightly while the price and Philippine revenue will fall significantly within the next decade.
Ein Brief des Elias Šinaja über die Wahl des Katholikos Išo'jahb IV
Creators: name: Vandenhoff, Bernhard
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 11 Nr. 2 (1913): Oriens christianus, Band 11, Heft 2
The Impact of Energy Markets on the EU Agricultural Sector
Creators: name: Tokgoz, Simla
name: Tokgoz, Simla
Publisher: name: Unknown
Year: 2009
Subjects: subject: Resource /Energy Economics and Policy
subject: Marketing
subject: FOS: Economics and business
subject: bioeconomic models
subject: energy
subject: trade analysis and policy.

description: The objective of this study is to analyze the impact of crude oil prices on the EU agricultural sector in an era when the biofuels sector is expanding because of policy initiatives and the desire to find alternative fuel sources. To this end, first a baseline is set up for the EU ethanol, grain, and dried distillers grains markets. In the next step, two different scenarios are run. The first scenario incorporates a 10-Euros-per-barrel increase in the EU crude oil price with the ethanol import tariffs in place. The second scenario incorporates the same shock with the ethanol import tariffs removed. In the first scenario, higher crude oil prices increase ethanol consumption, production, and therefore grain prices. In the second scenario, the impact of trade liberalisation is larger than the impact of the higher crude oil price. So, grain prices decline in this scenario despite an expansion in ethanol consumption. If there were a high enough crude oil price shock, which would affect the EU ethanol market more than trade liberalisation, the net impact on grain, feed, and food prices from the crude oil price shock would be mitigated by the increased trade from trade liberalisation. The study shows that the impact of energy prices on the EU agricultural sector is increasing with the emergence of the biofuels sector. It also illustrates the importance of trade policy in responding to higher crude oil and grain prices.
Forward modelling and inversion of geophysical magnetic data
Creators: name: Lelièvre, Peter George
Publisher: name: University of British Columbia
Year: 2009

description: The ultimate goal of this research was to invert geophysical magnetic data to recover three dimensional distributions of subsurface magnetic susceptibility of any possible magnitude and geometric complexity. Magnetic data collected over bodies of high susceptibility contain significant self-demagnetization effects. Self-demagnetization causes magnetizations to rotate away from the external inducing field and causes the amplitude of the magnetic response to scale nonlinearly with susceptibility. These effects are highly dependent on the shape of the object and they complicate interpretation. Examples where self-demagnetization is important include surveys for detection and discrimination of unexploded military ordnance (UXO) and mineral exploration surveys over highly mineralized banded iron formations and nickel deposits. Current modelling methods that account for self-demagnetization effects are limited to simple bodies, such as ellipsoids, where the geometry of the body is represented by a few parameters. Standard forward modelling methods for general susceptibility distributions (i.e. methods that can deal with complicated bodies) neglect the effects of self-demagnetization and can produce inaccurate results and subsequent deterioration in performance of the inverse solution. Here, a full solution to Maxwell's equations for source-free magnetostatics was developed using a finite volume discretization. The Earth region of interest is discretized into many prismatic cells, each with constant susceptibility, which allows for models of arbitrary geometric complexity. The finite volume forward modelling method is valid for any linear medium and is appropriate for modelling the response of highly magnetic objects. The forward modelling method was refined and the code was tested against analytical solutions for simple bodies and against a slower, more memory intensive full solution for general distributions formulated in the integral equation domain. All tests showed the forward modelling method to be sound within expected error tolerances. The finite volume modelling method formed the foundation for a subsequent inversion algorithm. In the discretization, many more model cells are used than there are data. As such, the inverse problem is underdetermined. The inverse problem was formulated as an unconstrained optimization problem in which an objective function is minimized. The objective function was designed so that the data are fit to an acceptable degree and the recovered model has desired spatial characteristics. The resulting optimization problem was nonlinear and required an iterative solution, for which a Gauss-Newton approach was used. Testing for the inversion code included inversion of synthetic data for simple bodies and inversion of survey data collected over a planted UXO target. All tests showed positive results.
Spatial dependence in the rank-size distribution of cities
Creators: name: Bergs, Rolf
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Econometrics (econ.EM)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Power law distributions characterise several natural and social phenomena. The Zipf law for cities is one of those. The study views the question of whether that global regularity is independent of different spatial distributions of cities. For that purpose, a typical Zipfian rank-size distribution of cities is generated with random numbers. This distribution is then cast into different settings of spatial coordinates. For the estimation, the variables rank and size are supplemented by spatial spillover effects in a standard spatial econometric approach. Results suggest that distance and contiguity effects matter. This finding is further corroborated by three country analyses.
description: 10 pages, 4 figures
Time-domain imaging of curling modes in a confined magnetic vortex and a micromagnetic study exploring the role of spiral spin waves emitted by the core
Creators: name: Ruiz, D. Osuna
name: Keatley, P. S.
name: Childress, J. R.
name: Katine, J. A.
name: Hicken, R. J.
name: Hibbins, A. P.
name: Ogrin, F. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The curling spin wave modes of a ferromagnetic vortex confined to a microscale disc have been directly imaged in response to a microwave field excitation using time-resolved scanning Kerr microscopy. Micromagnetic simulations have been used to explore the interaction of gyrotropic vortex core dynamics with the curling modes observed in the region of circulating in-plane magnetization. Hybridization of the fundamental gyrotropic mode with the degenerate, lowest-frequency, azimuthal modes has previously been reported to lead to their splitting and counter propagating motion, as we observe in our spectra and measured images. The curling nature of the modes can be ascribed to asymmetry in the static and dynamic magnetization across the disc thickness, but here we also present evidence that spiral spin waves emitted by the core can influence the spatial character of higher frequency curling modes for which hybridization is only permitted with gyrotropic modes of the same sense of azimuthal motion. While it is challenging to identify if such modes are truly hybridized from the mode dispersion in a confined disc, our simulations reveal that spiral spin waves from the core may act as mediators of the interaction between the core dynamics and azimuthal modes. At higher frequency, modes with radial character only do not exhibit marked curling, but instead show evidence of interaction with spin waves generated at the edge of the disc. The measured spatio-temporal character of the observed curling modes is accurately reproduced by our simulations, which reveal the emission of propagating short-wavelength spiral spin waves from both core and edge regions of the disc. Our simulations suggest that the propagating modes are not inconsequential, but may play a role in the dynamic overlap required for hybridization of modes of the core and in-plane magnetised regions.
description: 14 pages, 9 figures
Triplestore software evaluation results
Creators: name: Dikova, Yuliia
name: Kushnarenko, Volodymyr
name: Petrenko, Taras
name: Rodrigues, Preston
name: Huskova, Nadiia
name: Bönisch, Thomas
Publisher: name: Zenodo
Year: 2025

description: Triplestore evaluation results and selection summary within the NFDI4Cat project.

To support the management of RDF-based metadata within the NFDI4Cat infrastructure, several triplestore solutions were evaluated based on functional and non-functional requirements derived from user stories and project needs. The study focused on aspects such as integration capabilities, standards compliance, user experience, scalability, and licensing conditions.
Magnetic field amplification to the gigagauss scale via dynamos driven by femtosecond lasers
Creators: name: Jiang, K.
name: Pukhov, A.
name: Zhou, C. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Reaching gigagauss magnetic fields opens new horizons both in atomic and plasma physics. At these magnetic field strengths, the electron cyclotron energy $\hbarω_{c}$ becomes comparable to the atomic binding energy (the Rydberg), and the cyclotron frequency $ω_{c}$ approaches the plasma frequency at solid state densities that significantly modifies optical properties of the target. The generation of such strong quasistatic magnetic fields in laboratory remains a challenge. Using supercomputer simulations, we demonstrate how it can be achieved all-optically by irradiating a micro-channel target by a circularly polarized relativistic femtosecond laser. The laser pulse drives a strong electron vortex along the channel wall, inducing a megagauss longitudinal magnetic field in the channel by the inverse Faraday effect. This seed field is then amplified up to a gigagauss level and maintained on a picosecond time scale via dynamos driven by plasma thermal expansion off the channel walls. Our scheme sets a possible platform for producing long living extreme magnetic fields in laboratories using readily available lasers. The concept might also be relevant for applications such as magneto-inertial fusion.
Todxs cuentan: cultivating diversity in combinatorics
Creators: name: Ardila-Mantilla, Federico
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: This article describes the efforts of the SFSU-Colombia Combinatorics Initiative to build a research and learning community between California and Colombia. It seeks to broaden and deepen representation in mathematics, based on four underlying principles: 1. Mathematical potential is distributed equally among different groups, irrespective of geographic, demographic, and economic boundaries. 2. Everyone can have joyful, meaningful, and empowering mathematical experiences. 3. Mathematics is a powerful, malleable tool that can be shaped and used differently by various communities to serve their needs. 4. Every student deserves to be treated with dignity and respect.
description: 9 pages, 12 figures
$B_c \rightarrow J/ψ$ Form Factors for the full $q^2$ range from Lattice QCD
Creators: name: Harrison, Judd
name: Davies, Christine T. H.
name: Lytle, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the first lattice QCD determination of the $B_c \rightarrow J/ψ$ vector and axial-vector form factors. These will enable experimental information on the rate for $B_c$ semileptonic decays to $J/ψ$ to be converted into a value for $V_{cb}$. Our calculation covers the full physical $q^2$ range of the decay and uses non-perturbatively renormalised lattice currents. We use the Highly Improved Staggered Quark (HISQ) action for all valence quarks on the second generation MILC ensembles of gluon field configurations including $u$, $d$, $s$ and $c$ HISQ sea quarks. Our HISQ heavy quarks have masses ranging upwards from that of $c$; we are able to reach that of the $b$ on our finest lattices. This enables us to map out the dependence on heavy quark mass and determine results in the continuum limit at the $b$. We use our form factors to construct the differential rates for $B_c^- \rightarrow J/ψμ^- \barν_μ$ and obtain a total rate with $7\%$ uncertainty: $Γ(B_c^-\rightarrow J/ψμ^-\barν_μ)/|η_{\mathrm{EW}}V_{cb}|^2 = 1.73(12)\times 10^{13} ~\mathrm{s}^{-1}$. Including values for $V_{cb}$, $η_{\mathrm{EW}}$ and $τ_{B_c}$ yields a branching fraction for this decay mode of 0.0150(11)(10)(3) ~with uncertainties from lattice QCD, $η_\mathrm{EW}V_{cb}$ and $τ_{B_c}$ respectively.
description: 23 pages, 14 Figures, Version accepted for publication in Phys. Rev. D
Designing contingent valuation scenarios for environmental health: The case of childhood asthma
Creators: name: Brandt, Sylvia J.
name: Lavin, Felipe Vasquez
name: Hanemann, W. Michael
name: Brandt, Sylvia J.
name: Lavin, Felipe Vasquez
name: Hanemann, W. Michael
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: Health Economics and Policy
subject: environmental health
subject: children
subject: health risk

description: Valuation of morbidity associated with childhood asthma is significant both to policy and to non-market valuation methodologies. Our results show that household perceptions and beliefs, such as belief in one’s ability to predict and control asthma attacks, and relative perceptions of the overall burden asthma places on a family, have a larger impact on valuation than traditional measures of asthma severity. More generally, our approach can be applied to other chronic illnesses as well, such as diabetes or chronic pain.
Photometric and Obscurational Completeness
Creators: name: Brown, Robert A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a method that uses "completeness" to estimate the number of exrasolar planets discovered by an observing program with a direct-imaging instrument. We develop a completeness function for Earth-like planets on "habitable" orbits for an instrument with a central field obscuration, uniform sensitivity in an annular detection zone, and limiting sensitivity that is expressed as a "delta magnitude" with respect to the star, determined by systematic effects (given adequate exposure time). We demonstrate our method of estimation by applying it to our understanding of the coronagraphic version of the Terrestrial Planet Finder (TPF-C) mission as of October 2004. We establish an initial relationship between the size, quality, and stability of the instrument's optics and its ability to meet mission science requirements. We provide options for increasing the fidelity and versatility of the models on which our method is based, and we discuss how the method could be extended to model the TPF-C mission as a whole, to verify that its design can meet the science requirements.
description: 15 pages, 9 figures, 3 tables. High resolution version of figures may be viewed at http://sco.stsci.edu/astroph/march05/. ApJ, in press
ROEMER - Proposal for the Third Medium Size ESA Mission (M3)
Creators: name: Bastian, Ulrich
name: Gilmore, Gerald
name: Halbwachs, Jean-Louis
name: Høg, Erik
name: Knude, Jens
name: Kovalevsky, Jean
name: Labeyrie, Antoine
name: van Leeuwen, Floor
name: Lindegren, Lennart
name: Pel, Jan-Willem
name: Schrijver, Hans
name: Stabell, Rolf
name: Thejll, Peter
Publisher: name: The authors
Year: 1993
Subjects: Gaia

description: Proposal submitted in May 1993 to the European Space Agency in response to a call for ideas for the next medium-size mission (M3).
Does Marginal Price Matter? A Regression Discontinuity Approach to Estimating Water Demand
Creators: name: Nataraj, Shanthi
name: Hanemann, W. Michael
name: Nataraj, Shanthi
name: Hanemann, W. Michael
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Research Methods/ Statistical Methods
subject: water demand
subject: regression models
subject: price policy
subject: consumer behavior

description: Although complex pricing schedules are increasingly common in utility billing, it is difficult to determine whether consumers respond to complicated marginal prices because price changes are often confounded with simultaneous demand shocks or non-price policies. To overcome this challenge, we exploit a natural experiment - the introduction of a third price block in an increasing block pricing schedule for water - in Santa Cruz, California. Using a regression discontinuity design, we find that consumers do respond to changes in marginal price. Doubling marginal price led to a 12% decrease in water use (500 cubic feet per bill) among high-use households.
Expected coalescence rates of NS-NS binaries for laser beam interferometers
Creators: name: Pacheco, J. A. de Freitas
name: Regimbau, T.
name: Vincent, S.
name: Spallicci, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The coalescence rate of two neutron stars (NS) is revisited. For estimation of the number of bound NS-NS and the probability of their coalescence in a timescale $τ$, the galactic star formation history, directly derived from observations, and the evolution of massive stars are considered. The newly established galactic merging rate is $(1.7\pm 1.0) \times 10^{-5} yr^{-1}$, while the local merging rate, including the contribution of elliptical galaxies, is about a factor of two higher, $3.4 \times 10^{-5} yr^{-1}$. Using the present data basis on galaxy distribution in the local universe and the expected sensitivity of the first generation of laser beam interferometers, we estimate that one event should occur every 125 years for LIGO and one event each 148 years for VIRGO. The situation is considerably improved for advanced-LIGO since we predict that 6 events per year should be detected whereas for a recently proposed VIRGO new configuration, the event rate might increase up to 3 events every two years.
description: 15 pages, 3 figures accepted for publication in IJMPD
Adaptive Experimental Design Using the Propensity Score
Creators: name: Hahn, Jinyong
name: Hirano, Keisuke
name: Karlan, Dean S.
name: Hahn, Jinyong
name: Hirano, Keisuke
name: Karlan, Dean S.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Research Methods/ Statistical Methods
subject: experimental design
subject: propensity score
subject: efficiency bound

description: Many social experiments are run in multiple waves, or are replications of earlier social experiments. In principle, the sampling design can be modified in later stages or replications to allow for more efficient estimation of causal effects. We consider the design of a two-stage experiment for estimating an average treatment effect, when covariate information is available for experimental subjects. We use data from the first stage to choose a conditional treatment assignment rule for units in the second stage of the experiment. This amounts to choosing the propensity score, the conditional probability of treatment given covariates. We propose to select the propensity score to minimize the asymptotic variance bound for estimating the average treatment effect. Our procedure can be implemented simply using standard statistical software and has attractive large-sample properties.
Half-metallicity and Slater-Pauling behavior in the ferromagnetic Heusler alloys
Creators: name: Galanakis, I.
name: Dederichs, P. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Introductory chapter for the book "Halfmetallic Alloys - Fundamentals and Applications" to be published in the series Springer Lecture Notes on Physics, P. H. Dederichs and I. Galanakis (eds). It contains a review of the theoretical work on the half-metallic Heusler alloys.
description: Introductory chapter for the book "Halfmetallic Alloys - Fundamentals and Applications" to be published in the series Springer Lecture Notes on Physics, P. H. Dederichs and I. Galanakis (eds)
Die neun "Töpferlieder" des Simeon von Gêšîr
Creators: name: Euringer, Sebastian
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 11 Nr. 2 (1913): Oriens christianus, Band 11, Heft 2
Spatial Mode Correction of Single Photons using Machine Learning
Creators: name: Bhusal, Narayan
name: Lohani, Sanjaya
name: You, Chenglong
name: Hong, Mingyuan
name: Fabre, Joshua
name: Zhao, Pengcheng
name: Knutson, Erin M.
name: Glasser, Ryan T.
name: Magana-Loaiza, Omar S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spatial modes of light constitute valuable resources for a variety of quantum technologies ranging from quantum communication and quantum imaging to remote sensing. Nevertheless, their vulnerabilities to phase distortions, induced by random media, impose significant limitations on the realistic implementation of numerous quantum-photonic technologies. Unfortunately, this problem is exacerbated at the single-photon level. Over the last two decades, this challenging problem has been tackled through conventional schemes that utilize optical nonlinearities, quantum correlations, and adaptive optics. In this article, we exploit the self-learning and self-evolving features of artificial neural networks to correct the complex spatial profile of distorted Laguerre-Gaussian modes at the single-photon level. Furthermore, we demonstrate the possibility of boosting the performance of an optical communication protocol through the spatial mode correction of single photons using machine learning. Our results have important implications for real-time turbulence correction of structured photons and single-photon images.
description: 7 pages, 4 figures
Rank one and mixing differentiable flows
Creators: name: Fayad, Bassam
Publisher: name: arXiv
Year: 2004
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: DS

description: We construct, over some minimal translations of the two torus, special flows under a differentiable ceiling function that combine the properties of mixing and rank one.
Rotational modulation and single g-mode pulsation in the B9pSi star HD174356?
Creators: name: Mikulasek, Z.
name: Paunzen, E.
name: Huemmerich, S.
name: Niemczura, E.
name: Walczak, P.
name: Fraga, L.
name: Bernhard, K.
name: Janik, J.
name: Hubrig, S.
name: Jaervinen, S.
name: Jagelka, M.
name: Pintado, O. I.
name: Krticka, J.
name: Prisegen, M.
name: Skarka, M.
name: Zejda, M.
name: Ilyin, I.
name: Pribulla, T.
name: Kaminski, K.
name: Kaminska, M. K.
name: Tokarek, J.
name: Zielinski, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Chemically peculiar (CP) stars of the upper main sequence are characterised by specific anomalies in the photospheric abundances of some chemical elements. The group of CP2 stars, which encompasses classical Ap and Bp stars, exhibits strictly periodic light, spectral, and spectropolarimetric variations that can be adequately explained by the model of a rigidly rotating star with persistent surface structures and a stable global magnetic field. Using observations from the Kepler K2 mission, we find that the B9pSi star HD 174356 displays a light curve both variable in amplitude and shape, which is not expected in a CP2 star. Employing archival and new photometric and spectroscopic observations, we carry out a detailed abundance analysis of HD 174356 and discuss its photometric and astrophysical properties in detail. We employ phenomenological modeling to decompose the light curve and the observed radial velocity variability. Our abundance analysis confirms that HD 174356 is a silicon-type CP2 star. No magnetic field stronger than 110G was found. The star's light curve can be interpreted as the sum of two independent strictly periodic signals with P1 = 4.04355(5)d and P2 = 2.11169(3)d. The periods have remained stable over 17 years of observations. In all spectra, HD 174356 appears to be single-lined. From the simulation of the variability characteristics and investigation of stars in the close angular vicinity, we put forth the hypothesis that the peculiar light variability of HD 174356 arises in a single star and is caused by rotational modulation due to surface abundance patches (P1) and g mode pulsation (P2).
description: 19 pages, 13 figures, 7 tables, accepted by Monthly Notices of the Royal Astronomical Society
Diffusion and drift of cosmic rays in highly turbulent magnetic fields
Creators: name: Candia, Julián
name: Roulet, Esteban
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We determine numerically the parallel, perpendicular, and antisymmetric diffusion coefficients for charged particles propagating in highly turbulent magnetic fields, by means of extensive Monte Carlo simulations. We propose simple expressions, given in terms of a small set of fitting parameters, to account for the diffusion coefficients as functions of magnetic rigidity and turbulence level, and corresponding to different kinds of turbulence spectra. The results obtained satisfy scaling relations, which make them useful for describing the cosmic ray origin and transport in a variety of different astrophysical environments.
description: 17 pages, 7 figures
Relativistic electron spin dynamics in a strong unipolar laser field
Creators: name: Aleksandrov, I. A.
name: Tumakov, D. A.
name: Kudlis, A.
name: Shabaev, V. M.
name: Rosanov, N. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The behavior of an electron spin interacting with a linearly polarized laser field is analyzed. In contrast to previous considerations of the problem, the initial state of the electron represents a localized wave packet, and a spatial envelope is introduced for the laser pulse, which allows one to take into account the finite size of both objects. Special attention is paid to ultrashort pulses possessing a high degree of unipolarity. Within a classical treatment (both nonrelativistic and relativistic), proportionality between the change of the electron spin projections and the electric field area of the pulse is clearly demonstrated. We also perform calculations of the electron spin dynamics according to the Dirac equation. Evolving the electron wave function in time, we compute the mean values of the spin operator in various forms. It is shown that the classical relativistic predictions are accurately reproduced when using the Foldy-Wouthuysen operator. The same results are obtained when using the Lorentz transformation and the nonrelativistic (Pauli) spin operator in the particle's rest frame.
description: 16 pages, 10 figures
Land Use Change, Benefit Transfer and Ecosystem Valuation in North Georgia
Creators: name: Ngugi, Daniel
name: Mullen, Jeffrey D.
name: Bergstrom, John C.
name: Ngugi, Daniel
name: Mullen, Jeffrey D.
name: Bergstrom, John C.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Ecosystem
subject: Economic value
subject: North Georgia
subject: land use
subject: water quality
subject: structural time series
subject: benefit transfer
subject: forecasting

description: This study seeks to forecast land use change in a North Georgia ecosystem, and estimate the economic value of the ecosystem using benefit transfer techniques. We forecast land use change based on a structural time series model and a simple growth rate model. The study suggests a lower bound willingness to pay value of about USD 16,000 per year to ensure compliance with fishing and drinking water quality standards with regard to fecal coliform bacteria and dissolved oxygen. Conservation efforts are likely to cost less than the cost of defensive behavior or ecosystem restoration.
Upsilon Transverse Momentum at Hadron Colliders
Creators: name: Berger, Edmond L.
name: Qiu, Jianwei
name: Wang, Yili
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We predict the shape of the transverse momentum p_T spectrum of Upsilon production. The distribution at low p_T is dominated by the region of small impact parameter b and may be computed reliably in perturbation theory. We resum to all orders in the strong coupling alpha_s the process-independent large logarithmic contributions that arise from initial-state gluon showers in the small p_T (< M_Upsilon) region. The cross section at large p_T is represented by the alpha_s^3 lowest-order non-vanishing perturbative contribution.
description: 4 pages, 5 figures. Presented at the 2004 Meeting of the APS Division of Particles and Fields, University of California, Riverside, CA, Aug 26-31, 2004
LEARNING ENGLISH AS A SECOND LANGUAGE
Creators: name: Khakimova, Mokhichekhra
Publisher: name: Zenodo
Year: 2024

description: English is an international language which is used officially all around the world. English can connect society with the world in various aspects. Anybody who wants to make connections with the world should learn English. We as a society with English is not the main language in our country, it is necessary to learn English in order to reach the outside world. Learn English can be from anywhere, learn English from college, internet, English tutoring, and social media too. To make English as a second language in our life, we need to understand the basic of English and appropriate learning strategy.
The Origin of Magnetic Fields in Galaxies: Observational Tests with the Square Kilometre Array
Creators: name: Beck, Rainer
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The all-sky survey of Faraday rotation, a Key Science Project of the planned Square Kilometre Array, will accumulate tens of millions of rotation measure measurements toward background radio sources and will provide a unique database for characterizing the overall magnetic geometry of magnetic fields in galaxies and in the intergalactic medium. Deep imaging of the polarized synchrotron emission from a large number of nearby galaxies, combined with Faraday rotation data, will allow us to test the primordial, flow and dynamo models for field origin and amplification. The SKA will find the first fields in young galaxies and determine the timescale for building up small-scale turbulent and large-scale coherent fields. The spectrum of dynamo modes, if existing, will be resolved. The direction of the present-day coherent field keeps memory of the direction of the seed field which can be used for mapping the structure of the seed field before galaxy formation.
description: 4 pages, 3 figures. Conference Proceedings to be published in "The Origin and Evolution of Cosmic Magnetism", eds. R. Beck, G. Brunetti, L. Feretti, and B. Gaensler (Astronomische Nachrichten); Typos corrected 03/01/2006; References added in Sect. 4 & typos corrected 07/04/2006
LEGUS and Halpha-LEGUS Observations of Star Clusters in NGC 4449: Improved Ages and the Fraction of Light in Clusters as a Function of Age
Creators: name: Whitmore, Bradley C.
name: Chandar, Rupali
name: Lee, Janice
name: Ubeda, Leonardo
name: Adamo, Angela
name: Aloisi, Alessandra
name: Calzetti, Daniela
name: Cignoni, Michele
name: Cook, David
name: Elmegreen, Bruce G.
name: Gouliermis, Dimitrios
name: Grebel, Eva K.
name: Grasha, Kathryn
name: Johnson, Kelsey E.
name: Kim, Hwihyun
name: Sacchi, Elena
name: Smith, Linda J.
name: Tosi, Monica
name: Wofford, Aida
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new catalog and results for the cluster system of the starburst galaxy NGC 4449 based on multi-band imaging observations taken as part of the LEGUS and Halpha-LEGUS surveys. We improve the spectral energy fitting method used to estimate cluster ages and find that the results, particularly for older clusters, are in better agreement with those from spectroscopy. The inclusion of Halpha measurements, the role of stochasticity for low mass clusters, the assumptions about reddening, and the choices of SSP model and metallicity all have important impacts on the age-dating of clusters. A comparison with ages derived from stellar color-magnitude diagrams for partially resolved clusters shows reasonable agreement, but large scatter in some cases. The fraction of light found in clusters relative to the total light (i.e., T_L) in the U, B, and V filters in 25 different ~kpc-size regions throughout NGC 4449 correlates with both the specific Region Luminosity, R_L, and the dominant age of the underlying stellar population in each region. The observed cluster age distribution is found to decline over time as dN/dt ~ t^g, with g=-0.85+/-0.15, independent of cluster mass, and is consistent with strong, early cluster disruption. The mass functions of the clusters can be described by a power law with dN/dM ~ M^b and b=-1.86+/-0.2, independent of cluster age. The mass and age distributions are quite resilient to differences in age-dating methods. There is tentative evidence for a factor of 2-3 enhancement in both the star and cluster formation rate ~100 - 300 Myr ago, indicating that cluster formation tracks star formation generally. The enhancement is probably associated with an earlier interaction event.
Universality of the EMC Effect
Creators: name: Chen, Jiunn-Wei
name: Detmold, William
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using effective field theory, we investigate nuclear modification of nucleon parton distributions (for example, the EMC effect). We show that the universality of the shape distortion in nuclear parton distributions (the factorisation of the Bjorken x and atomic number (A) dependence) is model independent and emerges naturally in effective field theory. We then extend our analysis to study the analogous nuclear modifications in isospin and spin dependent parton distributions and generalised parton distributions.
description: 8 pages, 2 figures
Presentation - APPLICATION OF DRONES AND OSS FOR MAPPING AND VISUAL INSPECTION OF EMBANKMENT DAMS
Creators: name: Leite, Daniel Teixeira
Publisher: name: Zenodo
Year: 2020
Subjects: Dam safety, Drone, Aerial mapping, Visual inspection, Monitoring of Embankment, Surface model, Photogrammetric, Open Source Software (OSS), Orthophoto.

description: To evaluate the safety conditions for a geotechnical structure, particularly a dam is very important to know its actual geometry and to perform visual inspections as a tool to aid the dam monitoring. Nowadays drone technology is becoming more available making it a valuable tool to aid for visual inspections and geometry assessment. On the contrary, the software for image processing and model generation is still quite expensive and requires up-to-date hardware. Open Source Software (OSS) is a different approach in which instead of a copyright user are granted a copyleft licensing allowing for a more versatile use and a better resource management. For example, with OSS one can take advantage of distributed high-performance clusters without any licensing issues. The application of drones and open-source software for mapping geotechnical structures is a very interesting and productive solution, because with a low cost and fast solution one can produce quality orthophotos, surface models and cross-sections, to be used for other analysis like slopestability and stress-strain and seepage finite element analysis. This paper describes the application of the drone for inspection and mapping of Sambade Dam, as well the application of open-source software to process and to produce data and models to aid in the dam safety evaluation.
Heterogeneity among agent types and second-best management for non-market ecological services
Creators: name: Fenichel, Eli P.
name: Fenichel, Eli P.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Resource /Energy Economics and Policy
subject: entry-exit
subject: microparameter
subject: bioeconomics
subject: recreational fishing
subject: landing limits
subject: optimal control

description: Second-best management affects different agent types differently, and heterogeneity among agents may create instances when only second best management is feasible. Capital-theoretic bioeconomic modeling often has imposed representative agent assumptions that may not capture this heterogeneity. Interactions between agent heterogeneity and second-best management have received little attention. Such heterogeneity is particularly important when management actions do not directly affect extensive margin decisions. We employ a microparameter model in a dynamic bioeconomic model to incorporate agent heterogeneity and intensive and extensive margin decisions for a nonmarket good, recreational fishing. The model yields qualitatively different management recommendations when a representative agent is assumed than when heterogeneity is included using the microparameter approach.
Renormalization Group Invariants in the MSSM and Its Extensions
Creators: name: Demir, Durmus A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive one-loop renormalization group (RG) invariant observables and analyze their phenomenological implications in the MSSM and its μproblem solving extensions, U(1)' model and NMSSM. We show that there exist several RG invariants in the gauge, Yukawa and soft-breaking sectors of each model. In general, RG invariants are highly useful for projecting experimental data to messenger scale, for revealing correlations among the model parameters, and for probing the mechanism that breaks supersymmetry. The Yukawa couplings and trilinear soft terms in U(1)' model and NMSSM do not form RG invariants though there exist approximate invariants in low tan(beta). In the NMSSM, there are no invariants that contain the Higgs mass-squareds. We provide a comparative analysis of RG invariants in all three models and analyze their model-building and phenomenological implications by a number of case studies.
description: 32 pages, 5 tables; extended previous analysis to include U(1)' models and NMSSM where a comparative discussion is given
An Empirical Evaluation of New Socialist Countryside Development in China
Creators: name: Guo, Xiang-Yu
name: Yu, Zhi-Gang
name: Schmit, Todd M.
name: Henehan, Brian M.
name: Li, Dan
name: Guo, Xiang-Yu
name: Yu, Zhi-Gang
name: Schmit, Todd M.
name: Henehan, Brian M.
name: Li, Dan
Publisher: name: Unknown
Year: 2009
Subjects: subject: International Development
subject: Political Economy
subject: Public Economics
subject: China
subject: Factor Analysis
subject: New Socialist Countryside
subject: Policy Evaluation

description: China prioritized a New Socialist Countryside reform policy in 2005 to address the growing disparities in incomes and living standards between rural and urban populations. These policies are evaluated to provide a base line index of reform concerning farmer, agricultural, and rural economic development. Aggregate index scores are computed to rank provincial progress. Rankings indicate the progression of rural economic reform is moderate, at best, and mostly isolated to well-developed eastern provinces. Reform growth is also uneven across similarly, rural provinces indicating a need for continued attention in these poorer areas. More importantly, as reform efforts continue, the empirical framework established can be used to track relative performance over time.