cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Two-dimensional description of D-dimensional static black holes with pointlike sources
Creators: name: Cadoni, Mariano
name: Mignemi, Salvatore
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive two-dimensional (2D) solutions of a generic dilaton gravity model coupled with matter, which describe D-dimensional static black holes with pointlike sources. The equality between the mass M of the D-dimensional gravitational solution and the mass m of the source can be preserved also at the level of the 2D gravity model.
description: References added, some misprints corrected, some points clarified
Extent and Characteristics of Retail Fresh Beef Branding
Creators: name: Ward, Clement E.
name: Lusk, Jayson L.
name: Dutton, Jennifer M.
name: Ward, Clement E.
name: Lusk, Jayson L.
name: Dutton, Jennifer M.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Limited information exists regarding the extent and characteristics of branded fresh beef. Retail package data from a sample of grocery stores in three metropolitan areas enabled determining the extent of branded beef for ground beef, roasts, and steaks. Logit models identified factors affecting the probability of beef products being branded, and the probability of beef products carrying specific types of brands compared with store brands and generic (unbranded) beef. The extent of branded beef and type of brand both varied by store type, specific product, quality designation, package type, and presence of special labeling.
From very-extended to overextended gravity and M-theories
Creators: name: Englert, Francois
name: Henneaux, Marc
name: Houart, Laurent
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The formulation of gravity and M-theories as very-extended Kac-Moody invariant theories encompasses, for each very-extended algebra G+++, two distinct actions invariant under the overextended Kac-Moody subalgebra G++. The first carries a Euclidean signature and is the generalisation to G++ of the E10-invariant action proposed in the context of M-theory and cosmological billiards. The second action carries various Lorentzian signatures revealed through various equivalent formulations related by Weyl transformations of fields. It admits exact solutions, identical to those of the maximally oxidised field theories and of their exotic counterparts, which describe intersecting extremal branes smeared in all directions but one. The Weyl transformations of G++ relates these solutions by conventional and exotic dualities. These exact solutions, common to the Kac-Moody theories and to space-time covariant theories, provide a laboratory for analysing the significance of the infinite set of fields appearing in the Kac-Moody formulations.
description: Latex 23 pages, 1 figure
Collisional de-excitation in a quasi-2D degenerate Bose gas
Creators: name: Spielman, I. B.
name: Johnson, P. R.
name: Huckans, J. H.
name: Fertig, C. D.
name: Rolston, S. L.
name: Phillips, W. D.
name: Porto, J. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We separate a Bose-Einstein condensate into an array of 2D sheets using a 1D optical lattice, and then excite quantized vibrational motion in the direction normal to the sheets. Collisions between atoms induce vibrational de-excitation, transferring the large excitation energy into back-to-back outgoing atoms, imaged as rings in the 2D plane. The ring diameters correspond to vibrational energy level differences, and edge-on imaging allows identification of the final vibrational states. Time dependence of these data provides a nearly complete characterization of the decay process including the energies, populations, and lifetimes of the lowest two excited vibrational levels. The measured decay rates represent a suppression of collisional de-excitation due to the reduced dimensionality, a matter wave analog to inhibited spontaneous emission.
description: 4 pages, 4 figres
The Governance Economics of Capture and Aquaculture Fisheries
Creators: name: Thomson, Kenneth J.
name: Thomson, Kenneth J.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: fisheries
subject: aquaculture
subject: governance
subject: policy
subject: North Sea

description: The “new institutional economics” has influenced the study of public (or policy) choice, e.g. via the organization and incentives of “stakeholders”, and the analysis of international and other (e.g. state-private) agreements. Stakeholders in fisheries policy include fisherman and their families and communities, processors, scientists, environmentalists, fish product consumers, other (non-fishing-)marine, coastal and land users, government fisheries departments, and taxpayers. These play different roles, with different weights, in policy discussions, as shown in the reformed Common Fisheries Policy (CFP) of the European Union. The recently set up North Sea Regional Advisory Committee is used as an illustration. Conclusions suggest that successful governance of capture fisheries requires state intervention via a multi-level hierarchy, clear property rights, better information, and probably stronger monitoring or control of technology and fishing behavior.
Computer modeling of temperature profiles in freezing ground
Creators: name: Webb, Fern Marisa
Publisher: name: University of British Columbia
Year: 2009

description: Greater than 50% of the area of Canada is underlain by permafrost, a thermal condition defined by mean ground temperatures remaining below 0° for a minimum of two consecutive years. The condition of frozen ground bears on many aspects of northern ecology, climate, engineering and society. The temperature based definition of permafrost highlights that understanding the condition of permafrost requires understanding the temperature distribution and energy balance of the ground. Physically based numerical modeling of earth systems is a tool for understanding how past geoclimate conditions have produced current features, and how prospective changes in forcing might manifest future changes in landscape or climate. I have developed a numerical model to solve for a one-dimensional temperature distribution responding to time-dependent boundary conditions. Novel features of the model are a coordinate transformation which allows for a spatially mobile upper domain boundary, and a constituent mixture approach to define temperature dependent thermophysical soil properties. The model development is guided by a desire to minimize the stringency of input data requirements due to the sparse availability of quantitative information on soil properties and surface conditions. A variety of model applications are demonstrated using synthetic simulations and real world data.
On root-class residuality of generalized free products
Creators: name: Azarov, D. N.
name: Tieudjo, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E06, 20E26, 20F05, 20F19

description: Root-class residuality of free product of root-class residual groups is demonstrated. A sufficient condition for root-class residuality of generalized free product $G$ of groups $A$ and $B$ amalgamating subgroups $H$ and $K$ through the isomorphism $ϕ$ is derived. For the particular case when $A=B$, $H=K$ and $ϕ$ is the identity mapping, it is shown that group $G$ is root-class residual if and only if $A$ is root-class residual and subgroup $H$ of $A$ is root-class closed. These results are extended to generalized free product of infinitely many groups amalgamating a common subgroup.
description: 6 pages
Aquaculture and Fisheries Interactions: Implications for the Global Supply of Fish
Creators: name: Arnason, Ragnar
name: Arnason, Ragnar
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: Aquaculture
subject: Fisheries
subject: Aquaculture and fisheries interactions
subject: Global supply of fish

description: Aquaculture, or more generally fish farming, and fisheries interact in several different ways. First, many types of fish farming require fish products as inputs, mostly for feeding purposes. Second, farmed fish and wild fish products compete in fish markets with consequences for both the industry and, of course, consumers. Third, fish farming generates various types of polluting agents that may affect wild fish stocks and their habitat. Several other interactions exist. This paper is primarily concerned with the implications of the first of these interactions, namely the input relationships, for the overall supply of fish products in the future. To the extent that the fish farming industry demands wild fish products such as fish meal, fish oil, etc. as inputs, the price of these products is increased compared to what would otherwise be the case and, as a result, the price of fish landings. This encourages increased demand from the fish farming industry may – especially given the ecosystem context of most fisheries – lead to long-term fluctuations, instability and even chaotic behavior of wild fish supply. A formal model describing the above considerations is constructed. Possible schedules of global supply of fish products are calculated given various assumptions about (i) fisheries management, (ii) wild fish requirements of the fish farming industry, and (iii) technological progress in fish farming. The impact of expanding global fish farming on the wild fish industry and global supply of fish products is assessed.
Review of Environmental Issues in Fish Farming: Empirical Evidence from Salmon Farming
Creators: name: Asche, Frank
name: Tveteras, Sigbjorn
name: Asche, Frank
name: Tveteras, Sigbjorn
Publisher: name: Unknown
Year: 2005
Subjects: Environmental Economics and Policy
Livestock Production/Industries

description: Intensive fish farming has faced a number of environmental challenges both locally and globally. In this paper we review some of the most important environmental issues that has faced fish farming and then see how the industry has handled these challenges. Salmon aquaculture has probably faces more of these challenges than any other farmed species, with the possible exception of shrimp aquaculture. We concentrate on empirical evidence related to salmon, although the issues related to other farmed species are similar to that of salmon. Other environmental issues include degradation of local habitat, disruption of ecological systems, and detrimental impact on wild species. Evidence suggests that most of the local environmental problems have been resolved or minimized through industry action and governmental regulations, although a few challenges remain.
Dirac zero-modes in compact U(1) gauge theory
Creators: name: Drescher, Thomas
name: Lang, C. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study properties of the zero and near-zero eigenmodes of the overlap Dirac operator in compact U(1) gauge theory. In the confinement phase the exact zero-modes are localized as found by studying the values of the inverse participation ratio and other features. Non-zero-eigenmodes are less localized in the confinement phase. In the Coulomb phase no zero-modes are observed and the eigenmodes show no localization at all.
description: Minor corrections, 15 pages, 5 figures, LaTeX style
Investigation into nonlocal turbulence-closure at higher statistical order
Creators: name: Modzelewski, Henryk
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation investigates whether higher-statistical-order nonlocal turbulence-closure can be utilized to describe some of the complex features of atmospheric turbulent flows. Transilient turbulence theory, a nonlocal forcing and mixing model, was chosen as a framework. This theory describes turbulent transport as a two-dimensional 'transilient' matrix of exchange coefficients between different layers in the fluid. A new higher-statistical-order nonlocal parameterization of the transilient matrix is proposed. The studies of former parameterizations of transilient matrices have indicated the following main deficiencies: lack of asymmetry of upward and downward motions in convective boundary layers, improper vertical distribution of turbulent mixing, ad hoc definition of diagonal elements of transilient matrices, and unrealistically large ranges of turbulent transport. This dissertation proposes a parameterization that addresses these deficiencies. The following concepts are utilized in the new parameterization: a virtual turbulent-transport eddy, convective potential-energy and shear potential-energy of mean-flow instabilities, decomposition of forcing into symmetric and asymmetric components, prognostic equations for the nonlocal turbulence kinetic energy budget and for the 3rd statistical moment of the vertical velocity, a limited turbulent-transport range, and a transilient tendency-matrix as a precursor of the transilient matrix. The parameterization utilizes eight parameters. A testbed atmospheric boundary-layer model is created to investigate, evaluate, and compare the new closure with three other turbulence-closure models and with two large-eddy-simulation data sets. The evaluation of testbed model led to the following conclusions. The parameterization of asymmetry qualitatively predicts the overall asymmetry of turbulent transport. An improper vertical distribution of mixing in convective boundary layers is evident, caused by improper height and scale-wise structure of buoyancy forcing. The utilization of the new transilient tendencymatrix successfully removed the necessity to parameterize the diagonal elements of transilient matrices. The limited transport-range approximation causes sensitivity discretization. Finally, the parameterization is computationally expensive, mainly due to the cost of solving the prognostic equations. In summary, the new parameterization has demonstrated the potential to improve turbulence parameterization, but more work needs to be done.
A Calculable Toy Model of the Landscape
Creators: name: Dienes, Keith R.
name: Dudas, Emilian
name: Gherghetta, Tony
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by recent discussions of the string-theory landscape, we propose field-theoretic realizations of models with large numbers of vacua. These models contain multiple U(1) gauge groups, and can be interpreted as deconstructed versions of higher-dimensional gauge theory models with fluxes in the compact space. We find that the vacuum structure of these models is very rich, defined by parameter-space regions with different classes of stable vacua separated by boundaries. This allows us to explicitly calculate physical quantities such as the supersymmetry-breaking scale, the presence or absence of R-symmetries, and probabilities of stable versus unstable vacua. Furthermore, we find that this landscape picture evolves with energy, allowing vacua to undergo phase transitions as they cross the boundaries between different regions in the landscape. We also demonstrate that supergravity effects are crucial in order to stabilize most of these vacua, and in order to allow the possibility of cancelling the cosmological constant.
description: 49 pages, LaTeX, 13 figures, references added
Bioeconomic Evaluation of Substitution of Balanced Feed with Chaya (Cnidoscolus Chayamansa) Leaves in Tilapia Production
Creators: name: Poot-Lope, Gaspar Roman
name: Gasca-Leyva, Eucario
name: Poot-Lope, Gaspar Roman
name: Gasca-Leyva, Eucario
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: bioeconomic model
subject: cost minimization
subject: Tilapia

description: In Mexico, the culture of tilapia has developed in rural areas, where the main problem is low producer income. The state of Yucatan also experiences this situation, and scarcity of money needed to purchase inputs results in complementary feeding with chaya (Cnidoscolus chayamansa), whose leaves are edible for humans and animals. In this situation, CINVESTAV conducted experiments to determine the optimal level of substitution of balanced feed with ray chaya leaves. The test with 25% and 50% reduced balanced feed complemented with chaya (ad libitum) did not show significant differences (P>0.05) in growth compared to fishes fed with a complete ration of balanced feed (100% feed table). A bioeconomic model was developed, including a submodel of growth according to observed results in each test. The model was developed in Excel, considering economic and management components. In addition, the analysis was completed using the Marginal Rate of Technical Substitution (MRTS) to evaluate cost minimization. According to the MRTS results, it is necessary to add 2.4 units of chaya for each reduced unit of balanced feed, in order to maintain the same level of production. Substituting 50% of the recommended ration (feed table) with chaya resulted in lower production costs, generating profit maximization.
On linear stability of steady space-periodic magnetohydrodynamic systems to perturbations involving large periods
Creators: name: Zheligovsky, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: I construct a complete asymptotic expansion of solutions to the problem of linear stability of three-dimensional steady space-periodic magnetohydrodynamic states to perturbations involving large periods. Eddy diffusivity tensor is derived for parity-invariant steady states. I present numerical evidences that if perturbations of the flow are permitted, then the effect of negative eddy diffusivity emerges at much larger magnetic molecular diffusivities than in the kinematic dynamo problem (where no perturbations of the flow are assumed).
description: 16 pp., 1 Figure. In Russian
Quantum-dot-based optical polarization conversion
Creators: name: Astakhov, G. V.
name: Kiessling, T.
name: Platonov, A. V.
name: Slobodskyy, T.
name: Mahapatra, S.
name: Ossau, W.
name: Schmidt, G.
name: Brunner, K.
name: Molenkamp, L. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report circular-to-linear and linear-to-circular conversion of optical polarization by semiconductor quantum dots. The polarization conversion occurs under continuous wave excitation in absence of any magnetic field. The effect originates from quantum interference of linearly and circularly polarized photon states, induced by the natural anisotropic shape of the self assembled dots. The behavior can be qualitatively explained in terms of a pseudospin formalism.
description: 5 pages, 3 figures; a reference added
Sugawara et al Supplementary Figure and Tables
Creators: name: Miura, Tetsuji
Publisher: name: figshare
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Supplementary figure and supplementary tables in the manuscript entilted " Activation of the angiotensin II receptor promotes autophagy in renal proximal tubular cells and affords protection from ischemia/reperfusion injury".
Baryon Electromagnetic Properties in Partially Quenched Heavy Hadron Chiral Perturbation Theory
Creators: name: Tiburzi, Brian C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The electromagnetic properties of baryons containing a heavy quark are calculated at next-to-leading order in partially quenched heavy hadron chiral perturbation theory. Calculations are performed for three light flavors in the isospin limit and additionally for two light non-degenerate flavors. We use partially-quenched charge matrices that are easy to implement on the lattice. The results presented are necessary for the light quark mass extrapolation and zero-momentum extrapolation of lattice QCD and partially quenched lattice QCD calculations of heavy hadron electromagnetic properties. Additionally relations between the sextet electromagnetic form factors and transition form factors are derived.
description: 29 pages, 3 figures, RevTex4
Double pion photoproduction on nucleon and deuteron
Creators: name: Fix, A.
name: Arenhoevel, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Photoproduction of two pions on nucleon and deuteron is studied for photon energies from threshold up to $E_γ= 1.5$ GeV. For the elementary operator an effective Lagrangean approach is used with resonance and Born contributions. The model parameters are fixed by resonance decay widths and multipole analyses of single pion photoproduction. A satisfactory description of total cross sections of two-pion production on the proton for various charge channels is achieved, except for $π^0π^0$ production for which a significant underestimation is found near threshold. The operator then serves for the evaluation of this reaction on the deuteron in the impulse approximation. In addition, $NN$ rescattering in the final state is taken into account, but $πN$ and $ππ$ rescatterings are neglected. Results are presented for total cross sections and target asymmetries.
description: 28 pages revtex including 12 ps-figures
Gravitational radiation from elastic particle scattering in models with extra dimensions
Creators: name: Koch, B.
name: Bleicher, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we derive a formula for the energy loss due to elastic N to N particle scattering in models with extra dimensions that are compactified on a radius R. In contrast to a previous derivation we also calculate additional terms that are suppressed by factors of frequency over compactification radius. In the limit of a large compactification radius R those terms vanish and the standard result for the non compactified case is recovered.
description: 17 pages
Bimodality of [α/Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies
Creators: name: Khoperskov, Sergey
name: Haywood, Misha
name: Snaith, Owain
name: Di Matteo, Paola
name: Lehnert, Matthew
name: Vasiliev, Evgenii
name: Naroenkov, Sergey
name: Berczik, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a set of self-consistent chemo-dynamical simulations of MW-type galaxies formation to study the origin of the bimodality of $α$-elements in stellar populations. We explore how the bimodality is related to the geometrically and kinematically defined stellar discs, gas accretion and radial migration. We find that the two $α$-sequences are formed in quite different physical environments. The high-$α$ sequence is formed early from a burst of star formation (SF) in a turbulent, compact gaseous disc which forms a thick disc. The low-$α$ stellar populations is the result of quiescent SF supported by the slow accretion of enriched gas onto a radially extended thin disc. Stellar feedback-driven outflows during the formation of the thick disc are responsible for the enrichment of the surrounding gaseous halo, which subsequently feeds the disc on a longer time-scale. During the thin disc phase, chemical evolution reaches an equilibrium metallicity and abundance, where the stars pile-up. This equilibrium metallicity decreases towards the outer disc, generating the ridgeline that forms the low-$α$ sequence. We identify a second mechanism capable of creating a low-$α$ sequence in one of our simulations. Rapid shutdown of the SF, provoked by the feedback at the end of the thick disc phase, suppresses the chemical enrichment of the halo gas, which, once accreted onto the star-forming disc, dilutes the ISM at the beginning of the thin disc formation. Both mechanisms can operate in a galaxy, but the former is expected to occur when SF efficiency ceases to be dominated by the formation of the thick disc, while the latter can occur in the inner regions. Being the result of the presence of low and high gas density environments, the bimodality is independent of any particular merger history, suggesting that it could be much more widespread than has been claimed.
description: 22 pages, 19 figures, accepted for publication in MNRAS
The Bicoherence as a Diagnostic for Models of High Frequency QPOs
Creators: name: Maccarone, Thomas J.
name: Schnittman, Jeremy D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the use of the bicoherence - a measure of the phase coupling of oscillations at different frequencies - as a diagnostic between different models for high frequency quasi-periodic oscillations from Galactic black hole candidates. We show that this statistic is capable of finding qualitative distinctions between different hot spot models which produce nearly identical Fourier power density spectra. Finally, we show that proposed new timing missions should detect enough counts to make real use of this statistic.
description: 5 pages, 5 figures (some must be displayed in color), accepted to MNRAS
Modelling Risks in the Salmon Industry and Markets
Creators: name: Asheim, Leif Jarle
name: Lien, Gudbrand D.
name: Richardson, James W.
name: Tveteras, Ragnar
name: Veggeland, Frode
name: Asheim, Leif Jarle
name: Lien, Gudbrand D.
name: Richardson, James W.
name: Tveteras, Ragnar
name: Veggeland, Frode
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: risks
subject: salmon
subject: programming model
subject: econometric model
subject: international trade

description: The paper proposes developing a trade model for salmon to assist in discussions and negotiations of current international salmon trade issues and major risk problems facing the salmon industry. Two modeling approaches are discussed: 1) developing a traditional equilibrium trade programming model designed to maximize total welfare across all model regions by solving for a medium-term price that balances the amount of salmon supplied by the world region to the among processed and consumed by this region; and 2) developing an econometric stochastic simulation model based on linear or non-linear equations. Some disadvantages and weaknesses of the programming model are discussed, whereas the econometric model needs further exploration and consideration. The main use of the models will be to study the effects of problems related to market interventions, transportation, and competition in different exporting, processing or consuming regions.
TECHNO-ECONOMIC AND ENVIRONMENTAL VIABILITY OF CHARCOAL PRODUCTION PRACTICES IN PADALI COMMUNITY FOREST, LALITPUR
Creators: name: Dhital, Narayan Babu
Publisher: name: figshare
Year: 2020
Subjects: subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences
subject: 50204 Environmental Impact Assessment
subject: Environmental Science

description: This study analyzed the technological, financial and environmental viability of biomass charring technologies being adopted in Padali Community Forest of Lalitpur, Nepal. Earth pit, improved charring retort (ICR) and portable charring kiln (PCK) were evaluated based on efficiency and charcoal quality. The analysis revealed the best yield and efficiency of PCK. Overall charcoal quality characterized by fixed carbon content, volatile matter content, ash content, and the calorific value was also better with PCK. Calorific value, fixed carbon, volatile matter, ash content and mass yield of charcoal were significantly correlated with the peak charring temperature. The economic analysis revealed that PCK or earth pit kiln technology accompanied by bio-briquette production and sale was the most viable option based on Net Present Value. Occupational safety and health monitoring revealed an acceptable level of heat stress but respirable suspended particulate matter exposure was found a major problem. PCK was found to be the safest technology in terms of exposure of workers to respirable suspended particulate matter. Vegetation analysis showed that diversity, richness and regeneration status were satisfactory in both forest strata where biomass cleaning was done for charcoal production and where cleaning was not done. However, the comparison of forest structural diversity revealed notable differences in forest structural features in two strata.
Continuous grey model with conformable fractional derivative
Creators: name: Xie, Wanli
name: Liu, Caixia
name: Li, Weidong
name: Wu, Wenze
name: Liu, Chong
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: The existing fractional grey prediction models mainly use discrete fractional-order difference and accumulation, but in the actual modeling, continuous fractional-order calculus has been proved to have many excellent properties, such as hereditary. Now there are grey models established with continuous fractional-order calculus method, and they have achieved good results. However, the models are very complicated in the calculation and are not conducive to the actual application. In order to further simplify and improve the grey prediction models with continuous fractional-order derivative, we propose a simple and effective grey model based on conformable fractional derivatives in this paper, and two practical cases are used to demonstrate the validity of the proposed model.
Echoes from a singularity
Creators: name: Chowdhury, Avijit
name: Banerjee, Narayan
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Though the cosmic censorship conjecture states that spacetime singularities must be hidden from an asymptotic observer by an event horizon, naked singularities can form as the end product of a gravitational collapse under suitable initial conditions, so the question of how to observationally distinguish such naked singularities from standard black hole spacetimes becomes important. In the present paper, we try to address this question by studying the ringdown profile of the Janis-Newman-Winicour (JNW) naked singularity under axial gravitational perturbation. The JNW spacetime has a surfacelike naked singularity that is sourced by a massless scalar field and reduces to the Schwarzschild solution in absence of the scalar field. We show that for low strength of the scalar field, the ringdown profile is dominated by echoes which mellows down as the strength of the field increases to yield characteristic quasinormal mode frequency of the JNW spacetime.
description: Version published in PRD
Aspects of the biology of Selenocosmia stirlingi Hogg (araneae, theraphosidae)
Creators: name: Kotzman, Mandy
Publisher: name: Monash University
Year: 2020
Subjects: subject: Zoology
subject: FOS: Biological sciences

description: This thesis reports on a study of growth determination in the Australian theraphosid Selenocosmia stirlingi Hogg. In particular, the effects of food availability, temperature and photoperiod on growth and development were assessed by measuring changes in size and weight. Laboratory and field experiments were performed with juvenile spiders, primarily from installs III to V. The general biology of the spiders was examined in the Laboratory, and field studies were undertaken to provide information on the temperature and rainfall at the field site and on spider activity patterns.
Additional file 1 of The effect of steam sterilization on different 3D printable materials for surgical use in veterinary medicine
Creators: name: Dautzenberg, Philipp
name: Volk, Holger A.
name: Huels, Nikolaus
name: Cieciora, Lena
name: Dohmen, Katharina
name: Lüpke, Matthias
name: Seifert, Herman
name: Harms, Oliver
Publisher: name: figshare
Year: 2021
Subjects: subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Table 3. Representation of the median values and mean percentage deviations from the planned standard object. Representation of the materials PLA and GreenTEC Pro®, in the filling degrees 30 and 100% (N = total number of measurements).
Excitations of a Superfluid in a 3D Optical Lattice
Creators: name: Schori, Christian
name: Stöferle, Thilo
name: Moritz, Henning
name: Köhl, Michael
name: Esslinger, Tilman
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We prepare a Bose-Einstein condensed gas in a three-dimensional optical lattice and study the excitation spectrum of the superfluid phase for different interaction strengths. We probe the response of the system by modulating the depth of the optical lattice along one axis. The interactions can be controlled independently by varying the tunnel coupling along the other two lattice axes. In the weakly interacting regime we observe a small susceptibility of the superfluid to excitations, while for stronger interactions an unexpected resonance appears in the excitation spectrum. In addition we measure the coherent fraction of the atomic gas, which determines the depletion of the condensate.
description: 4 pages, 4 figures
Admissibility Condition and Nontrivial Indices on a Noncommutative Torus
Creators: name: Nagao, Keiichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the index of the Ginsparg-Wilson Dirac operator on a noncommutative torus numerically. To do this, we first formulate an admissibility condition which suppresses the fluctuation of gauge fields sufficiently small. Assuming this condition, we generate gauge configurations randomly, and find various configurations with nontrivial indices. We show one example of configurations with index 1 explicitly. This result provides the first evidence that nontrivial indices can be naturally defined on the noncommutative torus by utilizing the Ginsparg-Wilson relation and the admissibility condition.
description: 5 pages, (v2) table 1 replaced, (v3) references added, typos corrected, the final version to appear in Phys.Rev.D
A comparison of interpolation techniques for non-conformal high-order discontinuous Galerkin methods
Creators: name: Laughton, Edward
name: Tabor, Gavin
name: Moxey, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The capability to incorporate moving geometric features within models for complex simulations is a common requirement in many fields. Fluid mechanics within aeronautical applications, for example, routinely feature rotating (e.g. turbines, wheels and fan blades) or sliding components (e.g. in compressor or turbine cascade simulations). With an increasing trend towards the high-fidelity modelling of these cases, in particular combined with the use of high-order discontinuous Galerkin methods, there is therefore a requirement to understand how different numerical treatments of the interfaces between the static mesh and the sliding/rotating part impact on overall solution quality. In this article, we compare two different approaches to handle this non-conformal interface. The first is the so-called mortar approach, where flux integrals along edges are split according to the positioning of the non-conformal grid. The second is a less-documented point-to-point interpolation method, where the interior and exterior quantities for flux evaluations are interpolated from elements lying on the opposing side of the interface. Although the mortar approach has significant advantages in terms of its numerical properties, in that it preserves the local conservation properties of DG methods, in the context of complex 3D meshes it poses notable implementation difficulties which the point-to-point method handles more readily. In this paper we examine the numerical properties of each method, focusing not only on observing convergence orders for smooth solutions, but also how each method performs in under-resolved simulations of linear and nonlinear hyperbolic problems, to inform the use of these methods in implicit large-eddy simulations.
description: 37 pages, 15 figures, 5 tables, submitted to Computer Methods in Applied Mechanics and Engineering, revision 1
Quarkonia and heavy flavors at the LHC
Creators: name: Crochet, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Perspectives for quarkonia and heavy flavors measurements in heavy ion collisions at LHC are reviewed
description: 6 pages, Proceedings of the Hard Probes 2004 Conference, Ericeira, Portugal, Nov 2004, replaced with revised version
Mathematical Bioeconomic Modelling of the Interaction Between Aquaculture and Open Sea Fisheries
Creators: name: Antonelli, Gervasio
name: Bischi, Gian Italo
name: Lamantia, Fabio
name: Antonelli, Gervasio
name: Bischi, Gian Italo
name: Lamantia, Fabio
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: Resource /Energy Economics and Policy
subject: dynamical systems
subject: bioeconomic models
subject: fisheries

description: We analyze the problem of an integrated management of fisheries by using fish farming as a tool for restocking fish populations depleted by overfishing pressure. We first use a simple heuristic dynamic model, taken from a classical example of mathematical bioeconomics, in order to prove that fish restocking may be an efficient tool for sustainable fishery management in situations where excessive fishing effort is going to cause irreversible stock collapse. Then we propose a two-compartments bieconomic mathematical model, with age structure and age specific harvesting and restocking, to mimic integrated interactions between aquaculture and open sea fisheries, where reared fish are used as substitutes for marine catches. The model proposed in this paper tries to fill a gap between the rich mathematical bioeconomic literature, mainly devoted to the description of open sea fisheries and/or marine protected areas, and the very poor literature on mathematical bioeconomic modeling of interactions between fish farming and fisheries
Conormal bundles, contact homology and knot invariants
Creators: name: Ng, Lenhard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 57M27, 53D40, 81T30

description: We summarize recent work on a combinatorial knot invariant called knot contact homology. We also discuss the origins of this invariant in symplectic topology, via holomorphic curves and a conormal bundle naturally associated to the knot.
description: This is the version published by Geometry & Topology Monographs on 22 April 2006
Constraining the lensing of binary black holes from their stochastic background
Creators: name: Buscicchio, Riccardo
name: Moore, Christopher J.
name: Pratten, Geraint
name: Schmidt, Patricia
name: Bianconi, Matteo
name: Vecchio, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational waves (GWs) are subject to gravitational lensing in the same way as electromagnetic radiation. However, to date, no unequivocal observation of a lensed GW transient has been reported. Independently, GW observatories continue to search for the stochastic GW signal which is produced by many transient events at high redshift. We exploit a surprising connection between the lensing of individual transients and limits to the background radiation produced by the unresolved population of binary back hole mergers: we show that it constrains the fraction of individually resolvable lensed binary black holes to less than $\sim 4\times 10^{-5}$ at present sensitivity. We clarify the interpretation of existing, low redshift GW observations (obtained assuming no lensing) in terms of their apparent lensed redshifts and masses and explore constraints from GW observatories at future sensitivity. Based on our results, recent claims of observations of lensed events are statistically disfavoured.
description: 9 pages, 6 figures, includes Supplemental material, published in Physical Review Letters
The QCD Pomeron in Ultraperipheral Heavy Ion Collisions: V. Double Vector Meson Production in the BFKL Approach
Creators: name: Goncalves, V. P.
name: Machado, M. V. T.
name: Sauter, W. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work the double vector meson production in ultraperipheral heavy ion collisions is investigated within the BFKL approach. The integrated cross sections and event rates for the processes AA --> V1 V2 AA (V_i = rho, omega, phi, J/Psi, Upsilon) are computed and theoretical estimates for scattering on both light and heavy nuclei are given for energies of RHIC and LHC.
description: 10 pages, 1 figure. Version to be published in the European Physical Journal C
Calculated spectra for HeH+ and its effect on the opacity of cool metal poor stars
Creators: name: Engel, Elodie A.
name: Doss, Natasha
name: Harris, Gregory J.
name: Tennyson, Jonathan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The wavelength and Einstein A coefficient are calculated for all rotation-vibration transitions of $^4$He$^1$H$^+$, $^3$He$^1$H$^+$, $^4$He$^2$H$^+$ and $^3$He$^2$H$^+$, giving a complete line list and the partition function for $^4$HeH$^+$ and its isotopologues. This opacity is included in the calculation of the total opacity of low-metallicity stars and its effect is analysed for different conditions of temperature, density and hydrogen number fraction. For a low helium number fraction (as in the Sun), it is found that HeH$^+$ has a visible but small effect for very low densities ($ρ\leq 10^{-10}$g cm$^{-3}$), at temperatures around 3500 K. However, for high helium number fraction, the effect of HeH$^+$ becomes important for higher densities ($ρ\leq 10^{-6}$g cm$^{-3}$), its effect being most important for a temperature around 3500 K. Synthetic spectra for a variety of different conditions are presented.
description: 8 pages, 2 Figures Accepted for publication in Mon.Not.Roy.Astron.Soc
An Interpretative Model of Aquaculture Multifunctionality: A Methodological Framework Definition
Creators: name: De Blasi, Giuseppe
name: Acciani, Claudio
name: De Boni, A.
name: Roma, R.
name: De Blasi, Giuseppe
name: Acciani, Claudio
name: De Boni, A.
name: Roma, R.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: Environment
subject: Bioeconomics
subject: Distributional Effects
subject: Ecological Economics
subject: Water Pollution

description: International trade agreements and the new EU CAP targets require the definition of a new type of subsidy, depending on the non-market functions provided by production activities. The aim of the research project reported in this paper is to find a model to reward multifunctionality of aquaculture, defining all the positive externalities it involves and trying to calculate a monetary value for each of these.
Hadron resonance gas with van der Waals interactions
Creators: name: Vovchenko, Volodymyr
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An overview of a hadron resonance gas (HRG) model that includes van der Waals interactions between hadrons is presented. Applications of the excluded volume HRG model to heavy-ion collision data and lattice QCD equation of state are discussed. A recently developed quantum van der Waals hadron resonance gas model is covered as well. Applications of this model in the context of the QCD critical point are elaborated.
description: 21 pages, 9 figures. Invited review for IJMPE
Experimental evidence for the Volume Conjecture for the simplest hyperbolic non-2-bridge knot
Creators: name: Garoufalidis, Stavros
name: Lan, Yueheng
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57N10, 57M25

description: Loosely speaking, the Volume Conjecture states that the limit of the n-th colored Jones polynomial of a hyperbolic knot, evaluated at the primitive complex n-th root of unity is a sequence of complex numbers that grows exponentially. Moreover, the exponential growth rate is proportional to the hyperbolic volume of the knot. We provide an efficient formula for the colored Jones function of the simplest hyperbolic non-2-bridge knot, and using this formula, we provide numerical evidence for the Hyperbolic Volume Conjecture for the simplest hyperbolic non-2-bridge knot.
description: Published by Algebraic and Geometric Topology at http://www.maths.warwick.ac.uk/agt/AGTVol5/agt-5-17.abs.html
ECONOMIC IMPACTS OF DRYLAND SALINITY FOR GRAINS INDUSTRIES
Creators: name: Hajkowicz, Stefan
name: Young, Michael D.
name: Hajkowicz, Stefan
name: Young, Michael D.
Publisher: name: Unknown
Year: 2003
Subjects: Crop Production/Industries
Environmental Economics and Policy

description: This paper explores some possible economic impacts of worsening salinity severity and extent in the grains industry across Australia. It also looks at the potential to increase agricultural profits through remediation. The analysis is based on a spatial model of agricultural profits and salinity related crop/pasture yield losses. It is estimated that grains industry farming profits across Australia would rise by an upper limit $138 million per year were salinity costlessly removed from the landscape. It is also estimated that the present value of grains industry profit losses from worsening salinity extent and severity over the next 20 years is $237 million. These amounts can be considered against the costs of repair.
Additional file 1 of Synthesis, antibacterial and antioxidant activities of Thiazole-based Schiff base derivatives: a combined experimental and computational study
Creators: name: Lemilemu, Fitsum
name: Bitew, Mamaru
name: Demissie, Taye B.
name: Eswaramoorthy, Rajalakshmanan
name: Endale, Milkyas
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Spectral data of the synthesized compounds (1H NMR, 13C NMR, FTIR and UV–Vis spectra), comparison of experimental and calculated absorption spectra, Autodock Vina conformations of compounds 7—11 against E. coli DNA gyrase B, NAC, MEP and human peroxiredoxin 5 binding domains, DFT optimized geometries (xyz files), and QM descriptors are included within the additional files.