cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dispersing and semi-flat bands in the wide band gap two-dimensional semiconductor bilayer silicon oxide
Creators: name: Kremer, G.
name: Alvarez-Quiceno, J. C.
name: Pierron, T.
name: González, C.
name: Sicot, M.
name: Kierren, B.
name: Moreau, L.
name: Rault, J. E.
name: Fèvre, P. Le
name: Bertran, F.
name: Dappe, Y. J.
name: Coraux, J.
name: Pochet, P.
name: Fagot-Revurat, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial bilayer silicon oxide is a transferable two-dimensional material predicted to be a wide band gap semiconductor, with potential applications for deep UV optoelectronics, or as a building block of van der Waals heterostructures. The prerequisite to any sort of such applications is the knowledge of the electronic band structure, which we unveil using angle-resolved photoemission spectroscopy and rationalise with the help of density functional theory calculations. We discover dispersing bands related to electronic delocalisation within the top and bottom planes of the material, with two linear crossings reminiscent of those predicted in bilayer AA-stacked graphene, and semi-flat bands stemming from the chemical bridges between the two planes. This band structure is robust against exposure to air, and can be controled by exposure to oxygen. We provide an experimental lower-estimate of the band gap size of 5 eV and predict a full gap of 7.36 eV using density functional theory calculations.
Beyond the 'Double Dividend': Modelling the impacts of deep cuts in Australian greenhouse gas emissions
Creators: name: Hatfield-Dodds, Steve
name: Adams, Philip D.
name: Hatfield-Dodds, Steve
name: Adams, Philip D.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: greenhouse policy
subject: double dividend
subject: equity
subject: adaptive governance

description: Australian economic modelling of policy options to reduce greenhouse gas emissions has to date given little attention to (i) crafting policy scenarios that use emissions revenues to target significant existing tax distortions, (ii) quantifying the effects of policy on the price and affordability of energy products, and (iii) communicating policy impacts on living standards relative to current levels, as well as relative to future levels in the reference case. Building on modelling undertaken for the Australian Business Roundtable on Climate Change - which found that real consumption and income continue to grow strongly with emission reductions - we find that smart tax reform could significantly reduce the economic impact of emissions reductions, particularly in the initial years; and that the affordability of energy products improves over time despite marked increases in prices.
Persistent current magnification in a double quantum-ring system
Creators: name: Orellana, P. A.
name: Pacheco, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic transport in a system of two quantum rings side-coupled to a quantum wire is studied via a single-band tunneling tight-binding Hamiltonian. We derived analytical expressions for the conductance, density of states and the persistent current when the rings are threaded by magnetic fluxes. We found a clear manifestation of the presence of bound states in each one of those physical quantities when either the flux difference or the sum of the fluxes are zero or integer multiples of a quantum of flux. These bound states play an important role in the magnification of the persistent current in the rings. We also found that the persistent current keeps a large amplitude even for strong ring-wire coupling.
description: 15 pages, 10 figures. Submitted to PRB
Bidirectional Representation Learning from Transformers using Multimodal Electronic Health Record Data to Predict Depression
Creators: name: Meng, Yiwen
name: Speier, William
name: Ong, Michael K.
name: Arnold, Corey W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Advancements in machine learning algorithms have had a beneficial impact on representation learning, classification, and prediction models built using electronic health record (EHR) data. Effort has been put both on increasing models' overall performance as well as improving their interpretability, particularly regarding the decision-making process. In this study, we present a temporal deep learning model to perform bidirectional representation learning on EHR sequences with a transformer architecture to predict future diagnosis of depression. This model is able to aggregate five heterogenous and high-dimensional data sources from the EHR and process them in a temporal manner for chronic disease prediction at various prediction windows. We applied the current trend of pretraining and fine-tuning on EHR data to outperform the current state-of-the-art in chronic disease prediction, and to demonstrate the underlying relation between EHR codes in the sequence. The model generated the highest increases of precision-recall area under the curve (PRAUC) from 0.70 to 0.76 in depression prediction compared to the best baseline model. Furthermore, the self-attention weights in each sequence quantitatively demonstrated the inner relationship between various codes, which improved the model's interpretability. These results demonstrate the model's ability to utilize heterogeneous EHR data to predict depression while achieving high accuracy and interpretability, which may facilitate constructing clinical decision support systems in the future for chronic disease screening and early detection.
description: in IEEE Journal of Biomedical and Health Informatics (2021)
Accuracy of Optic Nerve Sheath Diameter Measurements in Pocket-Sized Ultrasound Devices in a Simulation Model
Creators: name: Johnson, Garrett GRJ
name: Jelic, Tomislav
name: Derksen, Angela
name: Unger, Bertram
name: Zeiler, Frederick A
name: Ziesmann, Markus T
name: Gillman, Lawrence M
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Medicine
ultrasound
intracranial pressure
point-of-care
simulation
intracranial hypertension
optic nerve

description: IntroductionTransorbital sonographic measurement of optic nerve sheath diameter (ONSD) is an emerging non-invasive technique for the identification and monitoring of intracranial hypertension. In recent years, new pocket ultrasound devices have become available, and it is uncertain if they have the resolution to measure such small structures appropriately as compared to their predecessors. In this study, we measure the performance of three ultrasound units on a simulation model to establish their precision and accuracy.MethodsONSD was measured by three expert point-of-care sonographers using ultrasound machines three times on each of seven discrete ONS model sizes ranging from 3.5 to 7.9 mm. Two pocket ultrasounds (IVIZ, Sonosite, and Lumify, Philips) and one standard-sized portable ultrasound (M-Turbo, Sonosite) were used. Measurements were analyzed for mean error and variance and tested for significance using blocked covariance matrix regression analyses.ResultsThe devices differed in their variances (Lumify: 0.19 mm2, M-Turbo: 0.26 mm2, IVIZ: 0.34 mm2) and their mean error (Lumify: −0.05 mm, M-Turbo: 0.10 mm, IVIZ: −0.10 mm). The difference in mean error between users is not significant (p = 0.45), but there is a significant difference in mean error between devices (p = 0.02).ConclusionsAccurate ONSD measurement is possible utilizing pocket-sized ultrasound, and in some cases, may be more accurate than larger portable ultrasound units. While the differences in these devices were statistically significant, all three were highly accurate, with one pocket device (Lumify) outperforming the rest. Further study in human subjects should be conducted prior to using pocket ultrasound devices for in vivo diagnosis of intracranial hypertension.
The recreational value of Lake McKenzie: An application of the travel cost method
Creators: name: Fleming, Christopher M.
name: Cook, Averil
name: Fleming, Christopher M.
name: Cook, Averil
Publisher: name: Unknown
Year: 2007
Subjects: subject: Resource /Energy Economics and Policy
subject: Lake McKenzie
subject: travel cost method
subject: recreation
subject: Fraser Island

description: Lake McKenzie is one of the most highly used and popular visitor destinations of all Fraser Island's natural sites, attracting 2,000 visitors a day in peak periods. Many consider this level of visitation to be unsustainable and the management authority is considering a range of management options. In assessing the alternatives it is useful to have some idea of the recreational value of the Lake under the current regime. This paper estimates this value using the travel cost method. Once adjustments for multiple-site visitors are made, the method yields recreational values of the Lake ranging from $13.7 M. to $31.8 M per annum, or from $104.30 to $242.84 per-person per-visit.
Magnetism in reduced dimensions
Creators: name: Fruchart, Olivier
name: Thiaville, André
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a short overview of a few selected issues of magnetism in reduced dimensions, which are the most relevant to set the background for more specialized contributions to the present Special Issue. Magnetic anisotropy in reduced dimensions is discussed, on a theoretical basis, then with experimental reports and views from surface to single-atom anisotropy. Then conventional magnetization states are reviewed, including macrospins, single domains, multidomains, and domain walls in stripes. Dipolar coupling is examined for lateral interactions in arrays, and for interlayer interactions in films and dots. Finally thermally-assisted magnetization reversal and superparamagnetism are presented. For each topic we sought a balance between well established knowledge and recent developments.
description: 13 pages. Part of a Special Issue of the C. R. Physique devoted to spinelectronics (2005)
Deep Learning Methods For Synthetic Aperture Radar Image Despeckling: An Overview Of Trends And Perspectives
Creators: name: Fracastoro, Giulia
name: Magli, Enrico
name: Poggi, Giovanni
name: Scarpa, Giuseppe
name: Valsesia, Diego
name: Verdoliva, Luisa
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Synthetic aperture radar (SAR) images are affected by a spatially-correlated and signal-dependent noise called speckle, which is very severe and may hinder image exploitation. Despeckling is an important task that aims at removing such noise, so as to improve the accuracy of all downstream image processing tasks. The first despeckling methods date back to the 1970's, and several model-based algorithms have been developed in the subsequent years. The field has received growing attention, sparkled by the availability of powerful deep learning models that have yielded excellent performance for inverse problems in image processing. This paper surveys the literature on deep learning methods applied to SAR despeckling, covering both the supervised and the more recent self-supervised approaches. We provide a critical analysis of existing methods with the objective to recognize the most promising research lines, to identify the factors that have limited the success of deep models, and to propose ways forward in an attempt to fully exploit the potential of deep learning for SAR despeckling.
Can subsidizing alternative energy technology development lead to faster global warming?
Creators: name: Duncan, Roderick
name: Duncan, Roderick
Publisher: name: Unknown
Year: 2007
Subjects: Environmental Economics and Policy

description: Modelling global climate changes without taking account of the changes in resource markets can produce climate policy with perverse consequences. In even the simplest economic model of emissions of greenhouse gases, naïve policies that ignore markets can lead to perverse outcomes- the opposite of that intended by the policymakers-such as accelerating global warming. Yet the global climate models that are commonly used to develop climate policy do not adequately model resource markets. As a consequence, we need to develop better models of resource markets within our global climate models.
Driving defect modes of Bose-Einstein condensates in optical lattices
Creators: name: Brazhnyi, V. A.
name: Konotop, V. V.
name: Pérez-García, Víctor M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present an approximate analytical theory and direct numerical computation of defect modes of a Bose-Einstein condensate loaded in an optical lattice and subject to an additional localized (defect) potential. Some of the modes are found to be remarkably stable and can be driven along the lattice by means of a defect moving following a step-like function defined by the period of Josephson oscillations and the macroscopic stability of the atoms.
description: 4 pages, 5 figures
Absence of significant spin current generation in Ti/FeCoB bilayers with strong interfacial spin-orbit coupling
Creators: name: Zhu, Lijun
name: Buhrman, Robert A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: After one decade of the intensive theoretical and experimental explorations, whether interfacial spin-orbit coupling (ISOC) at metallic magnetic interfaces can effectively generate a spin current has remained in dispute. Here, utilizing the Ti/FeCoB bilayers that are unique for the negligible bulk spin Hall effect and the strong tunable ISOC, we establish that there is no significant charge-to-spin conversion at magnetic interfaces via spin-orbit filtering effect or Rashba-Edelstein(-like) effect even when the ISOC is stronger than that of a typical Pt/ferromagnet interface and can promote strong perpendicular magnetic anisotropy. We also find a minimal orbital Hall effect in 3d Ti.
Simulations of the cosmic infrared and submillimeter background for future large surveys: I. Presentation and first application to Herschel/SPIRE and Planck/HFI
Creators: name: Fernandez-Conde, N.
name: Lagache, G.
name: Puget, J. -L.
name: Dole, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The coming Planck and Herschel missions will survey the sky at unprecedented angular scales and sensitivities. Simulations are needed for better interpretating the results of the surveys and for testing new methods of, e.g., source extraction and component separation. We present new simulations of the infrared and submillimeter cosmic background, including the correlation between infrared galaxies. The simulations were used to quantify the source-detection thresholds for Herschel/SPIRE and Planck/HFI, as well as to study the detectability of the cosmic infrared background correlated fluctuations. The simulations are based on an empirical model of IR galaxy evolution. For the correlations, we only included the linear clustering, assuming that infrared galaxies are biased tracers of the dark-matter fluctuation density field. We used the simulations with different bias parameters to predict the confusion noise for Herschel/SPIRE and Planck/HFI and the completeness levels. We also discuss the detectability of the linear clustering in Planck/HFI power spectra, including the foreground and backgrounds components. Simulated maps and catalogs are publicly available online at http://www.ias.u-psud.fr/irgalaxies/simulations.php
description: A&A, 2008, in press
Chaos-Assisted Long-Range Tunneling for Quantum Simulation
Creators: name: Martinez, Maxime
name: Giraud, Olivier
name: Ullmo, Denis
name: Billy, Juliette
name: Guéry-Odelin, David
name: Georgeot, Bertrand
name: Lemarié, Gabriel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present an extension of the chaos-assisted tunneling mechanism to spatially periodic lattice systems. We demonstrate that driving such lattice systems in an intermediate regime of modulation maps them onto tight-binding Hamiltonians with chaos-induced long-range hoppings $t_n \propto 1/n$ between sites at a distance $n$. We provide a numerical demonstration of the robustness of the results and derive an analytical prediction for the hopping term law. Such systems can thus be used to enlarge the scope of quantum simulations to experimentally realize long-range models of condensed matter.
description: 13 pages, 10 figures
Long-Term Radio Modulation in Sagittarius A* from Spin-Induced Disk Precession
Creators: name: Prescher, Martin
name: Melia, Fulvio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is some evidence, though yet unconfirmed, that Sagittarius A*--the supermassive black hole at the Galactic center--emits its radio waves modulated with a ~100-day period. What is intriguing about this apparent quasi-periodicity is that, though the amplitude of the modulation increases with decreasing wavelength (from 3.6 to 1.3 cm), the quasi-period itself does not seem to depend on the frequency of the radiation. It is difficult to imagine how a binary companion, were that the cause of this modulation, could have escaped detection until now. Instead, it has been suggested that the spin-induced precession of a disk surrounding a slowly rotating black hole could have the right period to account for this behavior. In this paper, we examine how Sagittarius A*'s light curve could be modulated by this mechanism. We demonstrate that the partial occultation of a nonthermal halo by a compact, radio-opaque disk does indeed produce the observed frequency-dependent amplitude. This appears to be in line with other observational arguments suggesting that Sagittarius A*'s mm/sub-mm spectrum is produced by a ~10 Schwarzschild-radius disk, whereas its cm-waves originate from a nonthermal particle distribution in a halo extending out to over 20 Schwarzschild radii. Interestingly, this model suggests that the observed period corresponds to half the precession period and that a non-axisymmetric disk could produce a second period roughly twice as long as the first.
description: 17 pages, 5 figures, accepted to ApJ
Looking for change? Roll the Dice and demand Attention
Creators: name: Diakogiannis, Foivos I.
name: Waldner, François
name: Caccetta, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Change detection, i.e. identification per pixel of changes for some classes of interest from a set of bi-temporal co-registered images, is a fundamental task in the field of remote sensing. It remains challenging due to unrelated forms of change that appear at different times in input images. Here, we propose a reliable deep learning framework for the task of semantic change detection in very high-resolution aerial images. Our framework consists of a new loss function, new attention modules, new feature extraction building blocks, and a new backbone architecture that is tailored for the task of semantic change detection. Specifically, we define a new form of set similarity, that is based on an iterative evaluation of a variant of the Dice coefficient. We use this similarity metric to define a new loss function as well as a new spatial and channel convolution Attention layer (the FracTAL). The new attention layer, designed specifically for vision tasks, is memory efficient, thus suitable for use in all levels of deep convolutional networks. Based on these, we introduce two new efficient self-contained feature extraction convolution units. We validate the performance of these feature extraction building blocks on the CIFAR10 reference data and compare the results with standard ResNet modules. Further, we introduce a new encoder/decoder scheme, a network macro-topology, that is tailored for the task of change detection. Our network moves away from any notion of subtraction of feature layers for identifying change. We validate our approach by showing excellent performance and achieving state of the art score (F1 and Intersection over Union-hereafter IoU) on two building change detection datasets, namely, the LEVIRCD (F1: 0.918, IoU: 0.848) and the WHU (F1: 0.938, IoU: 0.882) datasets.
description: 28 pages, under review in ISPRS P&RS, 1st revision. Figures of low quality due to compression for arxiv. Reduced abstract in arxiv due to character limitations
Low-energy Scattering and Effective Interactions of Two Baryons at $m_π\sim 450$ MeV from Lattice Quantum Chromodynamics
Creators: name: Illa, Marc
name: Beane, Silas R.
name: Chang, Emmanuel
name: Davoudi, Zohreh
name: Detmold, William
name: Murphy, David J.
name: Orginos, Kostas
name: Parreño, Assumpta
name: Savage, Martin J.
name: Shanahan, Phiala E.
name: Wagman, Michael L.
name: Winter, Frank
Publisher: name: arXiv
Year: 2020
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 interactions between two octet baryons are studied at low energies using lattice QCD (LQCD) with larger-than-physical quark masses corresponding to a pion mass of $m_π\sim 450$ MeV and a kaon mass of $m_{K}\sim 596$ MeV. The two-baryon systems that are analyzed range from strangeness $S=0$ to $S=-4$ and include the spin-singlet and triplet $NN$, $ΣN$ ($I=3/2$), and $ΞΞ$ states, the spin-singlet $ΣΣ$ ($I=2$) and $ΞΣ$ ($I=3/2$) states, and the spin-triplet $ΞN$ ($I=0$) state. The $s$-wave scattering phase shifts, low-energy scattering parameters, and binding energies when applicable, are extracted using Lüscher's formalism. While the results are consistent with most of the systems being bound at this pion mass, the interactions in the spin-triplet $ΣN$ and $ΞΞ$ channels are found to be repulsive and do not support bound states. Using results from previous studies at a larger pion mass, an extrapolation of the binding energies to the physical point is performed and is compared with experimental values and phenomenological predictions. The low-energy coefficients in pionless EFT relevant for two-baryon interactions, including those responsible for $SU(3)$ flavor-symmetry breaking, are constrained. The $SU(3)$ symmetry is observed to hold approximately at the chosen values of the quark masses, as well as the $SU(6)$ spin-flavor symmetry, predicted at large $N_c$. A remnant of an accidental $SU(16)$ symmetry found previously at a larger pion mass is further observed. The $SU(6)$-symmetric EFT constrained by these LQCD calculations is used to make predictions for two-baryon systems for which the low-energy scattering parameters could not be determined with LQCD directly in this study, and to constrain the coefficients of all leading $SU(3)$ flavor-symmetric interactions, demonstrating the predictive power of two-baryon EFTs matched to LQCD.
description: 69 pages, 31 figures and 25 tables; published version
Detecting gamma-ray bursts with the Pierre Auger Observatory using the single particle technique
Creators: name: Allard, D.
name: Parizot, E.
name: Bertou, X.
name: Beatty, J.
name: Vernois, M. Du
name: Nitz, D.
name: Rodriguez, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: During the past ten years, gamma-ray bursts (GRB) have been extensively studied in the keV-MeV energy range but the high energy emission still remain mysterious. Ground based observatories have the possibility to investigate energy range around one GeV using the "single particle technique". The aim of the present study is to investigate the capability of the Pierre Auger Observatory to detect the high energy emission of GRBs with such a technique. According to the detector response to photon showers around one GeV, and making reasonable assumptions about the high energy emission of GRBs, we show that the Pierre Auger Observatory is a competitive instrument for this technique, and that water tanks are very promising detectors for the single particle technique.
description: 4 pages, 2 figures, to appear in the 29th ICRC conference (Pune, India) proceedings
Chase-Escape Percolation on the 2D Square Lattice
Creators: name: Kumar, Aanjaneya
name: Grassberger, Peter
name: Dhar, Deepak
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: Chase-escape percolation is a variation of the standard epidemic spread models. In this model, each site can be in one of three states: unoccupied, occupied by a single prey, or occupied by a single predator. Prey particles spread to neighboring empty sites at rate $p$, and predator particles spread only to neighboring sites occupied by prey particles at rate $1$, killing the prey particle that existed at that site. It was found that the prey can survive with non-zero probability, if $p>p_c$ with $p_c<1$. Using Monte Carlo simulations on the square lattice, we estimate the value of $p_c = 0.49451 \pm 0.00001$, and the critical exponents are consistent with the undirected percolation universality class. We define a discrete-time parallel-update version of the model, which brings out the relation between chase-escape and undirected bond percolation. For all $p < p_c$ in $D$-dimensions, the number of predators in the absorbing configuration has a stretched-exponential distribution in contrast to the exponential distribution in the standard percolation theory. We also study the problem starting from the line initial condition with predator particles on all lattice points of the line $y=0$ and prey particles on the line $y=1$. In this case, for $p_c
description: Substantially revised with added figures and results
New Planetary Nebulae in the Galactic Bulge region with l>0deg - II
Creators: name: Boumis, P.
name: Akras, S.
name: Xilouris, E. M.
name: Mavromatakis, F.
name: Kapakos, E.
name: Papamastorakis, J.
name: Goudis, C. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The presentation of new results from an [O III] 5007 A survey in a search for planetary nebulae (PNe) in the galactic bulge is continued. A total of 60 objects, including 19 new PNe, have been detected in the remaining 34 per cent of the survey area, while 41 objects are already known. Deep Halpha+[N II] CCD images as well as low resolution spectra have been acquired for these objects. Their spectral signatures suggest that the detected emission originates from photoionized nebulae. In addition, absolute line fluxes have been measured and the electron densities are given. Accurate optical positions and optical diameters are also determined.
description: 14 pages, 5 figures, accepted for publication in MNRAS
An Application of Target-MOTAD Programming to the Analysis of Downside Business and Financial Risk on Farms
Creators: name: Parton, Kevin A.
name: Cumming, Robert J.
name: Parton, Kevin A.
name: Cumming, Robert J.
Publisher: name: Unknown
Year: 1990
Subjects: Research Methods/ Statistical Methods
Risk and Uncertainty

description: In this paper a description is provided of the development and use of a target-MOTAD model for use in consultative work with farmers who are under financial pressure. The analysis of downside risk and introduction of a trade-off between financial and business risks are key features of this model that make it especially applicable to such situations.
The explanation of the deformed Schild string
Creators: name: Maegawa, Rie Kuriki
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The author comments on [1]. One of the deformed actions can express the Neveu-Schwarz-Ramond superstring under three gauge conditions. One of these depends on a matrix induced by the string coordinate.
description: 6 pages
Again The Lucky Country?: Australian Rural Policy in 1988 and 1989
Creators: name: Gerritsen, Rolf
name: Abbott, Jacky
name: Gerritsen, Rolf
name: Abbott, Jacky
Publisher: name: Unknown
Year: 1989
Subjects: Agricultural and Food Policy

description: 1988 and 1989 saw a strong continuation of the 1987 rural recovery. Australia's emphasis on international agricultural trade reform also dominated domestic policy, which was concerned with complementary microeconomic efficiency reforms. The most significant developments in this vein were the reform of the marketing arrangements for the wheat and sugar industries. The government continued the "deal" it had made with the rural sector for rationalisation of rural assistance in return for reforms of industries affecting the rural sector's input and export costs. The slow pace of these corresponding reforms in the transport infrastructure and manufacturing industry sectors meant that the truce between the farm organisations and the Labor government was increasingly fragile by the end of 1989. The major intermittent "political" agenda item to emerge in the review period was the conservation issue.
Bittlinger, Arnold: Der römisch katholisch-pfingstliche Dialog und seine ökumenische Relevanz
Creators: name: Hein, Lorenz
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 27 Nr. 2 (1978): Ökumenische Rundschau, Band 27, Heft 2
Using incentives to promote stewardship on private forest land in BC
Creators: name: Schwichtenberg, Detmar
Publisher: name: University of British Columbia
Year: 2009

description: The government of British Columbia plans to regulate forest practices on private land in the province, largely in response to public pressure. The stated goals are to ensure a long term and stable timber supply and to protect environmental values. To achieve these goals, the BC government must choose among regulatory options ranging from a highly coercive and punishment-oriented approach such as the Forest Practices Code at one extreme, to an encouragement and reward-based approach at the other. The ideal choice is one that achieves the desired goals at the lowest cost to both the public and landowners. My hypothesis is that a shift away from traditional punishment-based command-cmd-control approaches and toward education-and-incentives would greatly promote regulatory efficiency. To test the hypothesis, three areas of research are considered. First, Organizational Behaviour research is examined to better understand the relative efficacy of punishment and reward in motivating people, and to assist in designing a reward-based motivation system. Second, a survey of BC private forest landowners helps determine how they might best be motivated to achieve public objectives. Third, other forest jurisdictions are examined to gain practical knowledge on the relative effectiveness and cost of different regulatory options. The survey indicates most forest landowners recognize a legitimate public interest in forest management on private land, but also that landowners place a high value on their independence and freedom to manage their forests. Landowners therefore favour a regulatory system based on education and financial incentives. Landowner preferences are supported by Organizational Behaviour research and experience in other jurisdictions. Studies indicate education greatly enhances the willingness and ability of landowners to meet public objectives, and that regulatory systems based on incentives are less expensive to administer, less intrusive on private property rights, and more likely to promote innovation. Research also shows government predilection for coercive regulatory measures is mainly the result of perceived political advantages. Finally, the paper outlines a regulatory system based on education, freedom to manage forest resources and financial incentives that can be used to achieve public objectives on private forest land in BC.
Phase equilibrium in two orbital model under magnetic field
Creators: name: Dong, S.
name: Yao, X. Y.
name: Wang, K. F.
name: Liu, J. -M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The phase equilibrium in manganites under magnetic field is studied using a two orbital model, based on the equivalent chemical potential principle for the competitive phases. We focus on the magnetic field induced melting process of CE phase in half-doped manganites. It is predicted that the homogenous CE phase begins to decompose into coexisting ferromagnetic phase and CE phase once the magnetic field exceeds the threshold field. In a more quantitative way, the volume fractions of the two competitive phases in the phase separation regime are evaluated.
description: 4 pages, 4 figures
ABCD of 't Hooft operators
Creators: name: Hayashi, Hirotaka
name: Okuda, Takuya
name: Yoshida, Yutaka
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute by supersymmetric localization the expectation values of half-BPS 't Hooft line operators in $\mathcal{N}=2$ $U(N)$, $SO(N)$ and $USp(N)$ gauge theories on $S^1 \times \mathbb{R}^3$ with an $Ω$-deformation. We evaluate the non-perturbative contributions due to monopole screening by calculating the supersymmetric indices of the corresponding supersymmetric quantum mechanics, which we obtain by realizing the gauge theories and the 't Hooft operators using branes and orientifolds in type II string theories.
description: 76 pages, many figures; v2: comments added, statements clarified, typos fixed, version in JHEP
A note on limit shapes of minimal difference partitions
Creators: name: Comtet, Alain
name: Majumdar, Satya N.
name: Sabhapandit, Sanjib
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We provide a variational derivation of the limit shape of minimal difference partitions and discuss the link with exclusion statistics. Also see arXiv:0707.2312 for a related paper.
description: 9 pages, 2 figures
China's Economic Growth, Changing Comparative Advantages and Agricultural Trade
Creators: name: Anderson, Kym
name: Anderson, Kym
Publisher: name: Unknown
Year: 1990
Subjects: Agricultural and Food Policy
International Relations/Trade

description: The rapid growth of the Chinese economy during the 1980s was accompanied by an equally rapid shift in China's comparative advantage towards light manufactures, such as textiles and clothing, at the expense of agriculture. If that economy were to resume the economic reform process that was stalled in 1988-89, its comparative advantages would move even further in that direction, following the pattern of its more industrialised neighbours. Dependence on agricultural imports - particularly feed grains, cotton and wool would rise unless domestic prices for farm products are increased substantially. Model simulation results are presented to support this conclusion (which is based on theory and historical experience) and to indicate the orders of magnitude that might be involved under various assumptions. The paper concludes with a discussion of the implications for China and its trading partners, including Australia.
An application of neutrix calculus to quantum field theory
Creators: name: Ng, Y. Jack
name: van Dam, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Neutrices are additive groups of negligible functions that do not contain any constants except 0. Their calculus was developed by van der Corput and Hadamard in connection with asymptotic series and divergent integrals. We apply neutrix calculus to quantum field theory, obtaining finite renormalizations in the loop calculations. For renormalizable quantum field theories, we recover all the usual physically observable results. One possible advantage of the neutrix framework is that effective field theories can be accommodated. Quantum gravity theories appear to be more manageable.
description: LateX, 19 pages
Masses and Radii of Low-Mass Stars: Theory versus Observations
Creators: name: Ribas, Ignasi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Eclipsing binaries with M-type components are still rare objects. Strong observational biases have made that today only a few eclipsing binaries with component masses below 0.6 Msun and well-determined fundamental properties are known. However, even in these small numbers the detailed comparison of the observed masses and radii with theoretical predictions has revealed large disagreements. Current models seem to predict radii of stars in the 0.4-0.8 Msun range to be some 5-15% smaller than observed. Given the high accuracy of the empirical measurements (a few percent in both mass and radius), these differences are highly significant. I review all the observational evidence on the properties of M-type stars and discuss a possible scenario based on stellar activity to explain the observed discrepancies.
description: 8 pages, 1 figure, proceedings of the meeting "Close Binaries in the 21st Century"
Meyer, Harding, Schütte, Heinz, Mund, Hans-Joachim: Katholische Anerkennung des Augsburgischen Bekenntnisses?
Creators: name: Boeckler, Richard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 27 Nr. 2 (1978): Ökumenische Rundschau, Band 27, Heft 2
Separating planetary reflex Doppler shifts from stellar variability in the wavelength domain
Creators: name: Cameron, A. Collier
name: Ford, E. B.
name: Shahaf, S.
name: Aigrain, S.
name: Dumusque, X.
name: Haywood, R. D.
name: Mortier, A.
name: Phillips, D. F.
name: Buchhave, L.
name: Cecconi, M.
name: Cegla, H.
name: Cosentino, R.
name: Cretignier, M.
name: Ghedina, A.
name: Gonzalez, M.
name: Latham, D. W.
name: Lodi, M.
name: Lopez-Morales, M.
name: Micela, G.
name: Molinari, E.
name: Pepe, F.
name: Piotto, G.
name: Poretti, E.
name: Queloz, D.
name: Juan, J. San
name: Segransan, D.
name: Sozzetti, A.
name: Szentgyorgyi, A.
name: Thompson, S.
name: Udry, S.
name: Watson, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar magnetic activity produces time-varying distortions in the photospheric line profiles of solar-type stars. These lead to systematic errors in high-precision radial-velocity measurements, which limit efforts to discover and measure the masses of low-mass exoplanets with orbital periods of more than a few tens of days. We present a new data-driven method for separating Doppler shifts of dynamical origin from apparent velocity variations arising from variability-induced changes in the stellar spectrum. We show that the autocorrelation function (ACF) of the cross-correlation function used to measure radial velocities is effectively invariant to translation. By projecting the radial velocities on to a subspace labelled by the observation identifiers and spanned by the amplitude coefficients of the ACF's principal components, we can isolate and subtract velocity perturbations caused by stellar magnetic activity. We test the method on a 5-year time sequence of 853 daily 15-minute observations of the solar spectrum from the HARPS-N instrument and solar-telescope feed on the 3.58-m Telescopio Nazionale Galileo. After removal of the activity signals, the heliocentric solar velocity residuals are found to be Gaussian and nearly uncorrelated. We inject synthetic low-mass planet signals with amplitude $K=40$ cm s$^{-1}$ into the solar observations at a wide range of orbital periods. Projection into the orthogonal complement of the ACF subspace isolates these signals effectively from solar activity signals. Their semi-amplitudes are recovered with a precision of $\sim~6.6$ cm s$^{-1}$, opening the door to Doppler detection and characterization of terrestrial-mass planets around well-observed, bright main-sequence stars across a wide range of orbital periods.
description: 19 pages, 15 figures, accepted 2 May 2021 for publication in MNRAS
Feynman-Jackson integrals
Creators: name: Diaz, Rafael
name: Pariguan, Eddy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce perturbative Feynman integrals in the context of q-calculus generalizing the Gaussian q-integrals introduced by Diaz and Teruel. We provide analytic as well as combinatorial interpretations for the Feynman-Jackson integrals.
description: Final version
Production Flexibility and Technical Change in Australia's Wheat-Sheep Zone
Creators: name: McKay, Lloyd
name: Lawrence, Denis
name: Vlastuin, Chris
name: McKay, Lloyd
name: Lawrence, Denis
name: Vlastuin, Chris
Publisher: name: Unknown
Year: 1982
Subjects: Production Economics
Research and Development/Tech Change/Emerging Technologies

description: The flexibility of production and the bias of technical change in the Wheat- Sheep Zone has been examined by estimating the system of derived output and input share equations from a translog variable profit function. This analysis was undertaken for three outputs (sheep and wool, crops, and beef cattle and other farm output) and five inputs (labour, materials and services, livestock, capital, and land). The supply of each of these three major groups of farm outputs has been inelastic. Sheep enterprise production has been complementary with cropping while crop and beef cattle outputs have not been complementary. The demand for materials and services inputs has been elastic while the elasticity of demand for labour has been approximately unity. Wool and other sheep output has been relatively labour intensive while crops have been relatively capital intensive. Livestock activities (sheep and cattle) have been relatively land intensive. Hence, policies that have caused the price of labour to be greater (less) than it would have been otherwise have discouraged (encouraged) the production of sheep enterprise output relatively more than other farm outputs.
Berkeley Field Methods: Aymara
Creators: name: Zapana Almanza, Hector
name: Baclawski, Kenneth
name: Lamoureux, Spencer
name: Leung, Herman
name: Michael, Lev
name: O'Hagan, Zachary
name: Otaegui, Alfonso
name: Rolle, Nicholas
name: Russell, Kamala
name: Sande, Hannah
name: Schinzel, Eva
name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022

description: This collection consists of audio recordings and scanned copies of field notes that derive from elicitation sessions conducted during biweekly class meetings held throughout the course of the academic year. Some texts are included.
The Luminosity, Colour and Morphology dependence of galaxy filaments in the Sloan Digital Sky Survey Data Release Four
Creators: name: Pandey, Biswajit
name: Bharadwaj, Somnath
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have tested for luminosity, colour and morphology dependence of the degree of filamentarity in seven nearly two dimensional strips from the Sloan Digital Sky Survey Data Release Four (SDSS DR4). The analysis is carried out at various levels of coarse graining allowing us to address different length-scales. We find that the brighter galaxies have a less filamentary distribution than the fainter ones at all levels of coarse graining. The distribution of red galaxies and ellipticals shows a higher degree of filamentarity compared to blue galaxies and spirals respectively at low levels of coarse graining. The behaviour is reversed at higher levels of coarse graining. We propose a picture where the ellipticals are densely distributed in the vicinity of the nodes where the filaments intersect while the spirals are sparsely distributed along the entire extent of the filaments. Our findings indicate that the regions with an excess of ellipticals are larger than galaxy clusters, protruding into the filaments. We have also compared the predictions of a semi-analytic model of galaxy formation (the Millennium Run galaxy catalogue) against our results for the SDSS. We find the two to be in agreement for the $M^{*}$ galaxies and for the red galaxies, while the model fails to correctly predict the filamentarity of the brighter galaxies and the blue galaxies.
description: 14 Pages, 2 tables, 11 figures, Accepted for publication in MNRAS, new section added for a comparison with semi analytical models of galaxy formation, substantial revision
Plant Variety Rights in Australia: Some Economic Issues
Creators: name: Godden, David P.
name: Godden, David P.
Publisher: name: Unknown
Year: 1982
Subjects: Research and Development/Tech Change/Emerging Technologies

description: The Australian Government tabled a Bill concerning Plant Variety Rights in May 1981. This Bill would, if enacted, establish property rights in new plant varieties. Plant Variety Rights legislation has been adopted in more than twenty countries. A range of economic issues relevant to the adoption of Plant Variety Rights legislation in Australia is considered in this paper, including assessments of some of the arguments of proponents and opponents of the proposed legislation. It is concluded that differences in the physical, economic, political and institutional environments in Australia mean that the claimed effects of Plant Variety Rights in other countries may not necessarily be repeated in Australia if this legislation were enacted here.
Superconductivity in a two dimensional extended Hubbard model
Creators: name: Calegari, E. J.
name: Magalhaes, S. G.
name: Gomes, A. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Roth's two-pole approximation has been used by the present authors to investigate the role of $d-p$ hybridization in the superconducting properties of an extended $d-p$ Hubbard model. Superconductivity with singlet $d_{x^2-y^2}$-wave pairing is treated by following Beenen and Edwards formalism. In this work, the Coulomb interaction, the temperature and the superconductivity have been considered in the calculation of some relevant correlation functions present in the Roth's band shift. The behavior of the order parameter associated with temperature, hybridization, Coulomb interaction and the Roth's band shift effects on superconductivity are studied.
description: 14 pages, 8 figures, accepted for publication in European Physical Journal B