cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase separation and the effect of quenched disorder in $Pr_{0.5}Sr_{0.5}MnO_3$
Creators: name: Pramanik, A. K.
name: Banerjee, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The nature of phase separation in $Pr_{0.5}Sr_{0.5}MnO_3$ has been probed by linear as well as nonlinear magnetic susceptibilities and resistivity measurements across the 2nd order paramagnetic to ferromagnetic transition ($T_C$) and 1st order ferromagnetic to antiferromagnetic transition ($T_N$). We found that the ferromagnetic (metallic) clusters, which form with the onset of long-range order in the system at $T_C$, continuously decrease their size with the decrease in temperature and coexist with non-ferromagnetic (insulating) clusters. These non-ferromagnetic clusters are identified to be antiferromagnetic. Significantly, it is shown that they do not arise because of the superheating effect of the lower temperature 1st order transition. Thus reveals unique phase coexistence in a manganite around half-doping encompassing two long-range order transitions. Both the ferromagnetic and antiferromagnetic clusters form at $T_C$ and persist much below $T_N$. Substitution of quenched disorder (Ga) at Mn-site promotes antiferromagnetism at the cost of ferromagnetism without adding any magnetic interaction or introducing any significant lattice distortion. Moreover, increase in disorder decreases the ferromagnetic cluster size and with 7.5% Ga substitution clusters size reduces to the single domain limit. Yet, all the samples show significant short-range ferromagnetic interaction much above $T_C$. Resistivity measurements also reveal the novel phase coexistence identified from the magnetic measurements. It is significant that, increase in disorder up to 7.5% increases the resistivity of the low temperature antiferromagnetic phase by about four orders.
Low energy transfer cross-section for Borromean halo nuclei
Creators: name: Cardenas, W. H. Z.
name: Canto, L. F.
name: Hussein, M. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We describe a schematic coupled channels transfer calculation for the reaction 6He + 238U at near-barrier energies. We also present a simple semiclassical DWBA calculation of the two neutron transfer. Both calculations are meant to supply the conditions under which the transfer cross section becomes much larger than the complete fusion one at sub-barrier energies. It seems that a feasible mechanism is the incoherent contributions of two or more processes with quite different Q-vlaues.
description: 4 pages, 3 figures
Phase separation in the crust of accreting neutron stars
Creators: name: Horowitz, C. J.
name: Berry, D. K.
name: Brown, E. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nucleosynthesis, on the surface of accreting neutron stars, produces a range of chemical elements. We perform molecular dynamics simulations of crystallization to see how this complex composition forms new neutron star crust. We find chemical separation, with the liquid ocean phase greatly enriched in low atomic number elements compared to the solid crust. This phase separation should change many crust properties such as the thermal conductivity and shear modulus. The concentration of carbon, if present, is enriched in the ocean. This may allow unstable thermonuclear burning of the carbon and help explain the ignition of the very energetic explosions known as superbursts.
description: 8 pages, 6 figures, minor changes, Physical Review E in press
System Components of Health and Innovation for the Organization of the Nano-Biomedic Ecosystem Technological Platform
Creators: name: Tkemaladze, Jaba
Publisher: name: figshare
Year: 2021
Subjects: subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Systemic problems pose many challenges in the European healthcare system of the 21st century, and it need strategies that should be implemented as large-scale euro-pilot projects in which monitoring and evaluation of their effectiveness will serve as the main echanism that generates the sectoral policy of the European healthcare system with an innovative component.
The HELLAS2XMM survey.VIII. Optical identifications of the extended sample
Creators: name: Cocchia, F.
name: Fiore, F.
name: Vignali, C.
name: Mignoli, M.
name: Brusa, M.
name: Comastri, A.
name: Feruglio, C.
name: Baldi, A.
name: Carangelo, N.
name: Ciliegi, P.
name: D'Elia, V.
name: La Franca, F.
name: Maiolino, R.
name: Matt, G.
name: Molendi, S.
name: Perola, G. C.
name: Puccetti, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) We present the results of the photometric and spectroscopic identification of 110 hard X-ray selected sources (6e-15 1000, while their Lx, L(R) and Nh are similar. This suggests that while the central engine of narrow-line AGNs and XBONGs looks similar, the narrow-line region in XBONGs could be strongly inhibited or obscured.
description: Accepted for publication in A&A, 18 pages, 19 figures
Determination of the Superconductor-Insulator Phase Diagram for One-Dimensional Wires
Creators: name: Bollinger, A. T.
name: Dinsmore, R. C.
name: Rogachev, A.
name: Bezryadin, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We establish the superconductor-insulator phase diagram for quasi-one dimensional wires by measuring a large set of MoGe nanowires. This diagram is consistent with the Chakravarty-Schmid-Bulgadaev phase boundary, namely with the critical resistance being equal to R_Q = h/4e^2. We find that transport properties of insulating nanowires exhibit a weak Coulomb blockade behavior.
description: 5 pages, 4 figures
R-code for analyses from Wildfires modify the parasite loads of invasive cane toads
Creators: name: Kaiser, Shannon W.
name: Greenlees, Matthew J.
name: Shine, Richard
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Health Care
subject: Diseases
subject: 111706 Epidemiology
subject: FOS: Health sciences

description: This file contains all R codes used in statistical analyses
Location of study sites from Wildfires modify the parasite loads of invasive cane toads
Creators: name: Kaiser, Shannon W.
name: Greenlees, Matthew J.
name: Shine, Richard
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Health Care
subject: Diseases
subject: 111706 Epidemiology
subject: FOS: Health sciences

description: This file contains the data on colelcting sites, with a map
Temperature effects in a spin-orbital model for manganites
Creators: name: Daghofer, M.
name: Neuber, D. R.
name: Oles, A. M.
name: von der Linden, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a two-dimensional effective orbital superexchange model derived for strongly correlated e_g electrons coupled to t_{2g} core spins in layered manganites. One finds that the ferromagnetic and antiferromagnetic correlations closely compete, and small changes of parameters can switch the type of magnetic order. For the same reason, spin order is easily destroyed with rising temperature, while alternating orbital correlations can persist to temperatures where FM order has already melted. A scenario for the AF phase observed in LaSrMnO_4 is presented.
description: 4 pages, 3 figures, contribution to the PM05-meeting in Poznan, Poland
Cascade of Complexity in Evolving Predator-Prey Dynamics
Creators: name: Guttenberg, Nicholas
name: Goldenfeld, Nigel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We simulate an individual-based model that represents both the phenotype and genome of digital organisms with predator-prey interactions. We show how open-ended growth of complexity arises from the invariance of genetic evolution operators with respect to changes in the complexity, and that the dynamics which emerges is controlled by a non-equilibrium critical point. The mechanism is analogous to the development of the cascade in fluid turbulence.
description: 5 pages, 3 figures; added comments on system size scaling and turbulence analogy, added error estimates of data collapse parameters. Slightly enhanced from the version which will appear in PRL
Regional, provenance and family variation in cold hardiness of western white pine (Pinus monticola Dougl. ex. D. Don)
Creators: name: Thomas, Barbara R.
Publisher: name: University of British Columbia
Year: 2010

description: Thirty-seven seedlots of western white pine (Pi nus mont i col a Doug. ex. D. Don) were tested for frost hardiness to determine how transferable seed would be from different seed sources within white pine's coast and interior ranges in British Columbia. Twenty-nine seedlots represented the coast and interior of British Columbia (BC), two were from coastal United States (US), three were from interior US and three were hybrids between interior US and interior BC parents. Detached needles were exposed to a series of freezing temperatures in a programable freezer and relative hardiness was calculated as the length of injured needle expressed as a percentage of total needle length 10 days after freezing. Seasonal progress in hardening was tested using five dates in the autumn of 1989. Seedlings were maintained at the University of British Columbia nursery. Testing also was carried out from samples collected on separate dates from Nakusp in the BC interior and from Ladysmith, a coastal BC site. There was a statistically significant (p<0.0l) regional difference between the BC coast and BC interior sources in all test runs, excluding the first UBC run and the Ladysmith run. In the runs where regions differed significantly, the difference in percent damage response of needles to freezing was approximately 20%. Measurements of shoot growth phenology were planned as an additional component of growth rhythm. Injury from uncontrolled freezing forced a change of objective to evaluation of genetic differences in recovery from freezing. Those evaluations did not reveal genetic differences in recovery.
Deprecated file
Creators: name: Deprecated
Publisher: name: Zenodo
Year: 2025
Subjects: vimarsha-foundation
sarvamnaya-oral-tradition-archive
sarvamnaya

description: 🌊 Everything moves. Everything pulses. You, me, the cosmos—nothing is truly still. This is Spanda, the ancient Indian philosophy.

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Original YouTube video: https://www.youtube.com/watch?v=jZFm_UOnxv0
Direct observation of acoustic phonon mediated relaxation between coupled exciton states in a single quantum dot molecule
Creators: name: Nakaoka, T.
name: Krenner, H. J.
name: Clark, E. C.
name: Sabathil, M.
name: Bichler, M.
name: Arakawa, Y.
name: Abstreiter, G.
name: Finley, J. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We probe acoustic phonon mediated relaxation between tunnel coupled exciton states in an individual quantum dot molecule in which the inter-dot quantum coupling and energy separation between exciton states is continuously tuned using static electric field. Time resolved and temperature dependent optical spectroscopy are used to probe inter-level relaxation around the point of maximum coupling. The radiative lifetimes of the coupled excitonic states can be tuned from ~2 ns to ~10 ns as the spatially direct and indirect character of the wavefunction is varied by detuning from resonance. Acoustic phonon mediated inter-level relaxation is shown to proceed over timescales comparable to the direct exciton radiative lifetime, indicative of a relaxation bottleneck for level spacings in the range $ΔE\$ ~3-6 meV.
description: 6 pages, 4 figures, submitted for publication
Supplementary Information from The lose-to-win strategy of the weak: intraspecific parasitism via egg abduction in a termite
Creators: name: Tamaki, Chihiro
name: Takata, Mamoru
name: Matsuura, Kenji
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: Predation by larger conspecifics poses a major threat to small juveniles in many animal species. However, in social insects, raids perpetrated by large colonies may provide smaller colonies with opportunities for parasitization. Herein, in the termite Reticulitermes speratus, we demonstrate that small incipient colonies parasitize large mature colonies through egg abduction when attacked by raiding conspecifics. We observed that the eggs of incipient colonies were brought into raiding colonies while their parents were killed during the attack. In this species, unmated females found new colonies with female–female (FF) cooperation, in addition to the typical monogamous colony foundation. Interestingly, the abducted eggs of FF pairs developed into nymphs (reproductive caste) in the raiding colonies, whereas the eggs of male–female (MF) pairs developed into workers (non-reproductive caste). Parthenogenetic eggs are known to be developmentally predisposed to becoming female reproductives owing to genomic imprinting in termites. This study demonstrates that the plundering of small colonies by larger conspecific colonies not only results in the extinction of the weaker colonies, but also serves as a strategy that incipient colonies use to obtain the reproductive position in large colonies by stealth. The results elucidate the diversity and complexity of inter-colonial interactions in social insects.
Excitation of surface plasmon-polaritons in metal films with double periodic modulation: anomalous optical effects
Creators: name: Kats, A. V.
name: Nesterov, M. L.
name: Nikitin, A. Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We perform a thorough theoretical analysis of resonance effects when an arbitrarily polarized plane monochromatic wave is incident onto a double periodically modulated metal film sandwiched by two different transparent media. The proposed theory offers a generalization of the theory that had been build in our recent papers for the simplest case of one-dimensional structures to two-dimensional ones. A special emphasis is placed on the films with the modulation caused by cylindrical inclusions, hence, the results obtained are applicable to the films used in the experiments. We discuss a spectral composition of modulated films and highlight the principal role of ``resonance'' and ``coupling'' modulation harmonics. All the originating multiple resonances are examined in detail. The transformation coefficients corresponding to different diffraction orders are investigated in the vicinity of each resonance. We make a comparison between our theory and recent experiments concerning enhanced light transmittance and show the ways of increasing the efficiency of these phenomena. In the appendix we demonstrate a close analogy between ELT effect and peculiarities of a forced motion of two coupled classical oscillators.
description: 24 pages, 17 figures
Determination of fragmentation functions and their uncertainties from e+ + e- -> h + X data
Creators: name: Hirai, M.
name: Kumano, S.
name: Nagai, T. -H.
name: Sudoh, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Fragmentation functions are determined for pions, kaons, and nucleons by a global analysis of charged-hadron production data in electron-positron annihilation. The optimum functions are obtained in both leading order (LO) and next-to-leading order (NLO) of alpha_s. It is important that uncertainties of the fragmentation functions are estimated in this work by the Hessian method. We found that the uncertainties are large at small Q^2 and that they are generally reduced in the NLO in comparison with the LO ones. We supply a code for calculating the fragmentation functions and their uncertainties for the pions, kaons, and nucleons at given z and Q^2.
description: 4 pages, LaTeX, 5 eps files, to be published in AIP proceedings of the 17th International Spin Physics Symposium (SPIN2006), Oct. 2-7, 2006, Kyoto, Japan
Flavour physics at large tan(beta) with a Bino-like LSP
Creators: name: Isidori, Gino
name: Mescia, Federico
name: Paradisi, Paride
name: Temes, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The MSSM with large tan(beta) and heavy squarks is a theoretically well motivated and phenomenologically interesting extension of the SM. This scenario naturally accommodates the (g-2)_μanomaly and the upper bound on the Higgs boson mass. In a wide region of the parameter space, visible non-standard effects are expected in a few low-energy observables, such as BR(B->tau nu), BR(B->l+ l-), BR(B->Xs gamma), and BR(mu->e gamma). We analyse the correlations of these non-standard effects under the additional assumption that the relic density of a Bino-like LSP accommodates the observed dark matter distribution.
description: 19 pages, 7 figures; v2: published version (minor modifications)
Intramolecular vibrational energy redistribution from a high frequency mode in the presence of an internal rotor: Classical thick-layer diffusion and quantum localization
Creators: name: Manikandan, Paranjothy
name: Keshavamurthy, Srihari
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the effect of an internal rotor on the classical and quantum intramolecular vibrational energy redistribution (IVR) dynamics of a model system with three degrees of freedom. The system is based on a Hamiltonian proposed by Martens and Reinhardt (J. Chem. Phys. {\bf 93}, 5621 (1990).) to study IVR in the excited electronic state of para-fluorotoluene. We explicitly construct the state space and show, confirming the mechanism proposed by Martens and Reinhardt, that an excited high frequency mode relaxes via diffusion along a thick layer of chaos created by the low frequency-rotor interactions. However, the corresponding quantum dynamics exhibits no appreciable relaxation of the high frequency mode. We attribute the quantum suppression of the classical thick-layer diffusion to the rotor selection rules and, possibly, dynamical localization effects.
description: To appear in J. Chem. Phys. (August 28, 2007); 4 pages and 3 figures
Unraveling duality violations in hadronic tau decays
Creators: name: Cata, Oscar
name: Golterman, Maarten
name: Peris, Santi
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: There are some indications from recent determinations of the strong coupling constant alpha_s and the gluon condensate that the Operator Product Expansion may not be accurate enough to describe non-perturbative effects in hadronic tau decays. This breakdown of the Operator Product Expansion is usually referred to as being due to ``Duality Violations.'' With the help of a physically motivated model, we investigate these duality violations. Based on this model, we argue how they may introduce a non-negligible systematic error in the current analysis, which employs finite-energy sum rules with pinched weights. In particular, this systematic effect might affect the precision determination of alpha_s from tau decays. With a view to a possible future application to real data, we present an alternative method for determining the OPE coefficients that might help estimating, and possibly even reducing, this systematic error.
description: 19 pages, 4 Figures. References, comments and a note added. Results unchanged
Supplementary document for Rapid chemically selective 3D imaging in the mid-infrared - 5269522.pdf
Creators: name: Potma, Eric
name: Knez, Dave
name: Chen, Yong
name: Davydova, Yulia
name: Durkin, Amanda
name: Fast, Alexander
name: Balu, Mihaela
name: Norton-Baker, Brenna
name: Martin, Rachel
name: Baldacchini, Tommaso
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Nonlinear Optics and Spectroscopy

description: Supplementary Information
Mixed-state fidelity and quantum criticality at finite temperature
Creators: name: Zanardi, Paolo
name: Quan, H. T.
name: Wang, Xiaoguang
name: Sun, C. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We extend to finite temperature the fidelity approach to quantum phase transitions (QPTs). This is done by resorting to the notion of mixed-state fidelity that allows one to compare two density matrices corresponding to two different thermal states. By exploiting the same concept we also propose a finite-temperature generalization of the Loschmidt echo. Explicit analytical expressions of these quantities are given for a class of quasi-free fermionic Hamiltonians. A numerical analysis is performed as well showing that the associated QPTs show their signatures in a finite range of temperatures.
description: 7 pages, 4 figures
Geometric and Extensor Algebras and the Differential Geometry of Arbitrary Manifolds
Creators: name: Fernandez, V. V.
name: Moya, A. M.
name: Rodrigues, W. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We give in this paper which is the third in a series of four a theory of covariant derivatives of representatives of multivector and extensor fields on an arbitrary open set U of M, based on the geometric and extensor calculus on an arbitrary smooth manifold M. This is done by introducing the notion of a connection extensor field gamma defining a parallelism structure on U, which represents in a well defined way the action on U of the restriction there of some given connection del defined on M. Also we give a novel and intrinsic presentation (i.e., one that does not depend on a chosen orthonormal moving frame) of the torsion and curvature fields of Cartan's theory. Two kinds of Cartan's connection operator fields are identified, and both appear in the intrinsic Cartan's structure equations satisfied by the Cartan's torsion and curvature extensor fields. We introduce moreover a metrical extensor g in U corresponding to the restriction there of given metric tensor \slg defined on M and also introduce the concept a geometric structure (U,gamma,g) for U and study metric compatibility of covariant derivatives induced by the connection extensor gamma. This permits the presentation of the concept of gauge (deformed) derivatives which satisfy noticeable properties useful in differential geometry and geometrical theories of the gravitational field. Several derivatives operators in metric and geometrical structures, like ordinary and covariant Hodge coderivatives and some duality identities are exhibit.
description: This paper is an improved version of material contained in math.DG/0501560, math.DG/0501561, math.DG/0502001
Quantum phase transition in the two-band Hubbard model
Creators: name: Costi, T. A.
name: Liebsch, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The interaction between itinerant and Mott localized electronic states in strongly correlated materials is studied within dynamical mean field theory in combination with the numerical renormalization group method. A novel nonmagnetic zero temperature quantum phase transition is found in the bad-metallic orbital-selective Mott phase of the two-band Hubbard model, for values of the Hund's exchange which are relevant to typical transition metal oxides.
description: 4 pages, 4 eps figures, revised version, to appear in Phys. Rev. Lett
On the paper ``Weak convergence of some classes of martingales with jumps''
Creators: name: Nishiyama, Yoichi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60F17 (Primary)

description: This note extends some results of Nishiyama [Ann. Probab. 28 (2000) 685--712]. A maximal inequality for stochastic integrals with respect to integer-valued random measures which may have infinitely many jumps on compact time intervals is given. By using it, a tightness criterion is obtained; if the so-called quadratic modulus is bounded in probability and if a certain entropy condition on the parameter space is satisfied, then the tightness follows. Our approach is based on the entropy techniques developed in the modern theory of empirical processes.
description: Published at http://dx.doi.org/10.1214/009117906000000755 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Time variation of the electron mass in the early universe and the Barrow-Magueijo model
Creators: name: Scóccola, Claudia G.
name: Mosquera, Mercedes E.
name: Landau, Susana J.
name: Vucetich, Héctor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We put limits on the time variation of the electron mass in the early universe using observational primordial abundances of D, He4 and Li7, recent data from the Cosmic Microwave Background and the 2dFGRS power spectrum. Furthermore, we use these constraints together with other astronomical and geophysical bounds from the late universe to test Barrow-Magueijo's model for the variation in m_e. From our analysis we obtain -0.615 < Gω/c^4 < -0.045 (3σinterval) in disagreement with the result obtained in the original paper.
description: Accepted for publication in ApJ
Leveraging Machine Learning For Sustainable Investment: Evaluating The Predictive Power Of Esg Metrics On Funding Allocations
Creators: name: Joseph Okpono
Publisher: name: Zenodo
Year: 2024

description: The integration of Environmental, Social, and Governance (ESG) factors into financial modeling hasbecome very crucial, as investors explore investment strategies for sustainable and responsible investment. Thisstudy probes how the use of Machine Learning (ML) techniques can be used to predict and allocate funding,based on ESG performance of an organization. The key objective is to evaluate the predictive accuracy ofdifferent ML models, in quantitatively forecasting funding allocations using ESG metrics. Dataset such as ESGmetrics and financial indicators including revenue and profit were collected from different companies. Toimprove the model’s predictability, feature engineering which involves creating new features that combine ESGmetrics with financial indicators to capture complex relationships affecting funding allocations was used. Theanalysis results indicate that the Random Forest model achieved the highest predictive accuracy, with an R² valueof 0.8657, demonstrating its robustness in managing complex, non-linear relationships within the dataset.Insights from the Feature Importance Analysis revealed that social and governance-related metrics, such asSocial Score Profit and Governance Score Profit, were the most significant predictors of funding received. Boththe Random Forest and Gradient Boosting ensemble methods outperformed traditional regression and SVMmodels in predicting funding allocations based on ESG performance, demonstrating their effectiveness inrevealing operational risks and opportunities. The findings from the study highlights the value ML models, suchas the ensemble methods, give in guiding investors towards companies with good social responsibility and ethicalpractices.
Quantized Berry Phases for a Local Characterization of Spin Liquids in Frustrated Spin Systems
Creators: name: Hatsugai, Yasuhiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recently by using quantized Berry phases, a prescription for a local characterization of gapped topological insulators is given. One requires the ground state is gapped and is invariant under some anti-unitary operation. A spin liquid which is realized as a unique ground state of the Heisenberg spin system with frustrations is a typical target system, since pairwise exchange couplings are always time-reversal invariants even with frustrations. As for a generic Heisenberg model with a finite excitation gap, we locally modify the Hamiltonian by a continuous SU(2) twist only at a specific link and define the Berry connection by the derivative. Then the Berry phase evaluated by the entire many-spin wavefunction is used to define the local topological order parameter at the link. We numerically apply this scheme for several spin liquids and show its physical validity.
description: 6 pages. submitted for a proceeding of the conference (HFM2006) as an original paper
Uptake and depuration of the antibiotics, oxytetracycline and Romet-30 in the Pacific oyster, Crassostrea gigas (Thunberg)
Creators: name: Jones, Trevor O.
Publisher: name: University of British Columbia
Year: 2010

description: Use of antibiotics in the aquaculture industry for the control of bacterial infections in salmon has led to public concern regarding antibiotic residues in salmon tissue and the potential health risk this poses to humans. Oxytetracycline and Romet-30 are two common antibacterial agents utilized to control disease in the local finfish aquaculture industry of British Columbia, Canada. Many fish farms in British Columbia are located within close proximity to existing shellfish stocks. The potential for antibiotic bioconcentration and the production of bacterial resistance to the drugs in bivalves is a concern. The development of a solid phase extraction technique for these two drugs from Pacific oysters, Crassostrea gigas was accomplished. Analysis of whole oysters via HPLC revealed detectable levels of oxytetracycline and Romet-30 up to 4 weeks after antibiotic treatment at the salmon farm site. Oysters suspended in the salmon net pens and surrounding waters were sampled over a 5 month period. Concentration of oxytetracycline residues in oyster tissue reached a maximum of 0.11 ppm (n=2). Levels of sulphadimethoxine in oyster tissue reached a maximum concentration of 1.27 ppm (n=2). Maximum detectable concentrations of ormetoprim in oysters were 0.26 ppm (n=2). A controlled study investigating uptake and depuration of oxytetracycline and Romet-30 in the Pacific oyster revealed results similar to those described for the salmon farm. A flow through drug delivery system for the Pacific oyster was utilized over a ten day uptake and thirty day depuration period. Levels of oxytetracycline in whole animal tissue increased in a linear fashion (r²=0.984) over the uptake period. This indicates that the drug was bioaccumulated in the oyster reaching a maximum concentration of 10.72 ± 2.4 s.e. ppm (n= 3) on day 10 of uptake. Depuration of the drug was rapid. After thirteen days a concentration of 0.21 ± 0.04 s.e. ppm (n=7) was detected. The detection of Romet-30 in the uptake and depuration in the oyster was more erratic. Day 7 of uptake revealed a maximum concentration of sulphadimethoxine and ormetoprim of 1.092 ± 0.24 s.e. ppm (n=7) and 0.21 ppm (n=3) respectively. Depuration of Romet-30 was rapid. The concentration decreased to 0.029 ppm (n=3) by day 13. Condition indices of oysters sampled before and after antibiotic treatment indicated a significant increase (p<0.05) in condition index after treatment with medicated feed. A quantitative survey of bacteria associated with the gut of the oyster was performed. Relative numbers of endogenous bacteria were compared to oysters before and after antibiotic treatment. Numbers of bacteria significantly decreased (p< 0.05) following treatment.
DARIAH Open WG Meeting: Digital practices for the Study of urban Heritage
Creators: name: Artopoulos, Georgios
name: Martinez, Alfonso Bahillo
Publisher: name: Zenodo
Year: 2021
Subjects: architectural heritage
participatory methodology
AR
urban heritage
sustainable heritage approaches

description: The UDigiSH (Digital Practices for the Study of Urban Heritage) Working Group focuses on the study of Digital Methods and Good Practices of heritage and urban change, impact of urban development on cultural heritage, the identity of the city and the role of civil society. In this meeting we will present results of the WG workshop that took place in Palermo, Italy in July 2021, with support from the DARIAH WG Grant; we will discuss about digital tools, co-creation, public space, built heritage, crowdsourcing, and spatial data management; and consider the next steps of developing our WG methodology in 2022. The agenda is: Presentation of the objective and proceedings of the workshop in Palermo Contributions Outcome – future opportunities Lessons learned Next steps (2022 events & activities) Software development
description: {"references": ["https://doi.org/10.1080/20507828.2019.1631061"]}
Strongly correlated fermions after a quantum quench
Creators: name: Manmana, S. R.
name: Wessel, S.
name: Noack, R. M.
name: Muramatsu, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using the adaptive time-dependent density-matrix renormalization group method, we study the time evolution of strongly correlated spinless fermions on a one-dimensional lattice after a sudden change of the interaction strength. For certain parameter values, two different initial states (e.g., metallic and insulating), lead to observables which become indistinguishable after relaxation. We find that the resulting quasi-stationary state is non-thermal. This result holds for both integrable and non-integrable variants of the system.
description: 4 pages, 5 figures, published version
State-Relevant Maxwell's Equation from Kaluza-Klein Theory
Creators: name: Luan, Jing
name: Ma, Yongge
name: Ma, Bo-Qiang
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We study a five-dimensional perfect fluid coupled with Kaluza-Klein (KK) gravity. By dimensional reduction, a modified form of Maxwell's equation is obtained, which is relevant to the equation of state of the source. Since the relativistic magnetohydrodynamics (MHD) and the 3-dimensional formulation are widely used to study space matter, we derive the modified Maxwell's equations and relativistic MHD in 3+1 form. We then take an ideal Fermi gas as an example to study the modified effect, which can be visible under high density or high energy condition, while the traditional Maxwell's equation can be regarded as a result in the low density and low temperature limit. We also indicate the possibility to test the state-relevant effect of KK theory in a telluric laboratory.
description: 11 pages, 3 figures; version published in PRD
The influence of row covers and plant population density on the growth and productivity of bell peppers (Capsicum annuum L.)
Creators: name: Gaye, Mary Margaret
Publisher: name: University of British Columbia
Year: 2010

description: An interlocking group of studies was conducted to examine the effects of row covers and plant population density on the growth and productivity of field-grown bell peppers. The studies were carried out at the Agriculture Canada Research Station, Agassiz, British Columbia, in 1988. Analysis of variance was used to determine treatment effects on reproductive and vegetative components of yield. A nonlinear regression model was used to define the yield responses. Yield components were assessed, at different stages of plant growth, for their contribution to reproductive and total plant yield variation, using a two-dimensional partitioning technique. The influence of growth and treatments on fruit and whole plant allometry was studied using a best subset multiple regression procedure. Row covers enhanced reproductive and vegetative yield per plant and per land area. Increasing plant population densities resulted in decreasing yield per plant, but increasing yield per land area. Furthermore, the effect of row covers on yield was greater at low population densities than high. The number of nodes was the most important contributor to variation in reproductive and total plant yield. Fruit weight as a proportion of total plant yield was also a major contributor to reproductive yield. The analysis showed the importance of row covers in the initial stages of growth, and the increasing importance of plant population density as growth proceeded, on yield components and on reproductive and total plant yield. Allometric relationships defining fruit and plant morphology changed during growth, and were also affected by row covers and plant population density. The changes were reflected through the allometric exponent and the allometric coefficient. Significant increases in horticultural yield resulted from the application of row covers and from high plant population densities. The response was quantified in mathematical models. Yield component analysis and allometric analysis of reproductive and total plant yield, proved to be valuable techniques for extending our understanding of plant growth relations resulting from the applied treatments.
Slow dynamics at the smeared phase transition of randomly layered magnets
Creators: name: Huether, Shellie
name: Kinney, Ryan
name: Vojta, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate a model for randomly layered magnets, viz. a three-dimensional Ising model with planar defects. The magnetic phase transition in this system is smeared because static long-range order can develop on isolated rare spatial regions. Here, we report large-scale kinetic Monte Carlo simulations of the dynamical behavior close to the smeared phase transition which we characterize by the spin (time) autocorrelation function. In the paramagnetic phase, its behavior is dominated by Griffiths effects similar to those in magnets with point defects. In the tail region of the smeared transition the dynamics is even slower: the autocorrelation function decays like a stretched exponential at intermediate times before approaching the exponentially small asymptotic value following a power law at late times. Our Monte-Carlo results are in good agreement with recent theoretical predictions based on optimal fluctuation theory.
description: 7 pages, 6 eps figures, final version as published
A Note on Polonyi Problem
Creators: name: Nakamura, Shuntaro
name: Yamaguchi, Masahiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reinvestigate the cosmological Polonyi problem in the case where the Polonyi mass is $\mathcal{O}(10) \rm{TeV}$. Such a large supersymmetry breaking scale implies that the Polonyi field should be sequestered from the standard model sector. Since the Polonyi field does not have a coupling to the gauge multiplets at tree level, in order to obtain sufficiently high reheating temperature compatible with the standard big-bang nucleosynthesis the Polonyi mass well exceeds 100 - 1000 TeV, depending on the decay channels. Moreover, we find that the branching ratio of the Polonyi field into neutralinos is of order unity, and thus the resulting neutralino LSPs, if stable, overclose the Universe even for the case of the wino-like LSP. Our explicit computation given here exhibits a very serious cosmological difficulty for models where supersymmetry breaking is caused by the Polonyi-type field.
description: 11 pages, 1 figure, references added
Functional differences between herbs and woody species in a semiarid Mediterranean plant community: a whole-plant perspective on growth, nutrient-use and size
Creators: name: Illuminati, Angela
name: Matesanz, Silvia
name: Pías, Beatriz
name: Sánchez, Ana M.
name: de la Cruz, Marcelino
name: Ramos-Muñoz, Marina
name: López-Angulo, Jesús
name: Pescador, David S.
name: Escudero, Adrián
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 419999
subject: Other environmental sciences not elsewhere classified

description: Linking roots and plant growth in Mediterranean environments
The first high-amplitude delta Scuti star in an eclipsing binary system
Creators: name: Christiansen, J. L.
name: Derekas, A.
name: Ashley, M. C. B.
name: Webb, J. K.
name: Hidas, M. G.
name: Hamacher, D. W.
name: Kiss, L. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of the first high-amplitude delta Scuti star in an eclipsing binary, which we have designated UNSW-V-500. The system is an Algol-type semi-detached eclipsing binary of maximum brightness V = 12.52 mag. A best-fitting solution to the binary light curve and two radial velocity curves is derived using the Wilson-Devinney code. We identify a late A spectral type primary component of mass 1.49+/-0.02 M_sun and a late K spectral type secondary of mass 0.33+/-0.02 M_sun, with an inclination of 86.5+/-1.0 degrees, and a period of 5.3504751+/-0.0000006 d. A Fourier analysis of the residuals from this solution is performed using PERIOD04 to investigate the delta Scuti pulsations. We detect a single pulsation frequency of f_1 = 13.621+/-0.015 c/d, and it appears this is the first overtone radial mode frequency. This system provides the first opportunity to measure the dynamical mass for a star of this variable type; previously, masses have been derived from stellar evolution and pulsation models.
description: 7 pages, 6 figures, 2 tables, for submission to MNRAS, v2: paper size change, small typographical changes to abstract
Purification and serology of apple chlorotic leaf spot virus isolated from Prunus glandulosa
Creators: name: Thompson, Daniel Andrew
Publisher: name: University of British Columbia
Year: 2010

description: Two isolates (A and B) of apple chlorotic leafspot virus (ACLSV) associated with line pattern symptoms in Prunus, glandulosa were isolated in Chenopodium quinoa and purified by a simple method using bentonite clarification, polyethylene glycol precipitation, and caesium sulphate isopycnic centrifugation. Symptoms on herbaceous hosts were as previously reported for ACLSV. No symptoms were observed on a range of ACLSV woody host indicators. Isolates A and B had a coat protein MW of 26 and 24.5 kilodaltons respectively, ssRNA of MW 2.6 x 10⁶ daltons, and dsRNA of MW 5.6 x 10⁶, 4.9 x 10⁶, and 4.5 x 10⁶ daltons. The particle widths were 12 nm and lengths were 782 nm (A) and 732 nm (B). Buoyant density in caesium sulphate was 1.27 g/cc³. In thin sections of C. quinoa, flexuous rods were seen in the cytoplasm and nucleus of young sieve-tube members. Polyclonal antisera prepared against the A and B isolates had high background reactions and required cross-adsorption with host sap. Three monoclonal antibodies (MAB) against isolate A detected Prunus strains while a fourth detected both Malus and Prunus strains in C. quinoa with low background reactions. The broad spectrum MAB could not be used as a trapping antibody but could be directly conjugated with alkaline phosphatase or used in an indirect triple-antibody sandwich ELISA. Tobacco mosaic virus (TMV) recovered from P. glandulosa was identical in serological and physical properties to the TMV-U1 type strain.
Entanglement Entropy in Random Quantum Spin-S Chains
Creators: name: Saguia, A.
name: Sarandy, M. S.
name: Boechat, B.
name: Continentino, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We discuss the scaling of entanglement entropy in the random singlet phase (RSP) of disordered quantum magnetic chains of general spin-S. Through an analysis of the general structure of the RSP, we show that the entanglement entropy scales logarithmically with the size of a block and we provide a closed expression for this scaling. This result is applicable for arbitrary quantum spin chains in the RSP, being dependent only on the magnitude S of the spin. Remarkably, the logarithmic scaling holds for the disordered chain even if the pure chain with no disorder does not exhibit conformal invariance, as is the case for Heisenberg integer spin chains. Our conclusions are supported by explicit evaluations of the entanglement entropy for random spin-1 and spin-3/2 chains using an asymptotically exact real-space renormalization group approach.
description: 5 pages, 4 figures
Electronic structures of layered perovskite Sr2MO4 (M=Ru, Rh, and Ir)
Creators: name: Moon, S. J.
name: Kim, M. W.
name: Kim, K. W.
name: Lee, Y. S.
name: Kim, J. -Y.
name: Park, J. -H.
name: Kim, B. J.
name: Oh, S. -J.
name: Nakatsuji, S.
name: Maeno, Y.
name: Nagai, I.
name: Ikeda, S. I.
name: Cao, G.
name: Noh, T. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigated the electronic structures of the two-dimensional layered perovskite Sr$_{2}$\textit{M}O$_{4}$ (\textit{M}=4\textit{d} Ru, 4\textit{d} Rh, and 5\textit{d} Ir) using optical spectroscopy and polarization-dependent O 1\textit{s} x-ray absorption spectroscopy. While the ground states of the series of compounds are rather different, their optical conductivity spectra $σ(ω)$ exhibit similar interband transitions, indicative of the common electronic structures of the 4\textit{d} and 5\textit{d} layered oxides. The energy splittings between the two $e_{g}$ orbitals, $i.e.$, $d_{3z^{2}-r^{2}}$ and $d_{x^{2}-y^{2}}$, are about 2 eV, which is much larger than those in the pseudocubic and 3\textit{d} layered perovskite oxides. The electronic properties of the Sr$_{2}$\textit{M}O$_{4}$ compounds are discussed in terms of the crystal structure and the extended character of the 4\textit{d} and 5\textit{d} orbitals.