cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Meeting Total Fat Requirements for School Lunches: Influences of School Policies and Characteristics
Creators: name: Newman, Constance
name: Guthrie, Joanne F.
name: Mancino, Lisa
name: Ralston, Katherine L.
name: Musiker, Melissa
name: Newman, Constance
name: Guthrie, Joanne F.
name: Mancino, Lisa
name: Ralston, Katherine L.
name: Musiker, Melissa
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Health Economics and Policy
subject: Institutional and Behavioral Economics
subject: National School Lunch Program (NSLP)
subject: obesity
subject: nutrition

description: Concerns about child obesity have raised questions about the quality of meals served in the National School Lunch Program. Local, State, and Federal policymakers responded to these concerns beginning in the mid-1990s by instituting a range of policies and standards to improve the quality of U.S. Department of Agriculture-subsidized meals. Schools have been successful in meeting USDA nutrient standards except those for total fat and saturated fat. This report uses school-level data from the School Nutrition Dietary Assessment-III to calculate statistical differences between the fat content of NSLP lunches served by schools with different policies (e.g., menu planning) and characteristics like region and size. Positive associations are found between a meal’s fat content and the presence of a la carte foods and vending machines, which are thought to indirectly affect the nutrient content of USDA-subsidized meals.
Stereodynamic control of overlapping resonances in cold molecular collisions
Creators: name: Morita, Masato
name: Yao, Qian
name: Xie, Changjian
name: Guo, Hua
name: Balakrishnan, Naduvalath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Stereodynamic control of resonant molecular collisions has emerged as a new frontier in cold molecule research. Recent experimental studies have focused on weakly interacting molecular systems such as HD collisions with H$_2$, D$_2$ and He. We report here the possibility of such control in strongly interacting systems taking rotational relaxation in cold collisions of HCl and H$_2$. Using explicit quantum scattering calculations in full six dimensions it is shown that robust control of the collision dynamics is possible even when multiple (overlapping) shape-resonances coexist in a narrow energy range, indicating that cold stereochemistry offers great promise for many molecules beyond simple systems. We demonstrate a striking case where two prominent peaks in overlapping resonances are switched-off simultaneously by suitable alignment of the HCl molecule.
description: 5 pages, 4 figures, 31 references and Supplemental Material (5 pages, 5 figures)
СРАВНЕНИЕ ЭНЕРГОПОТРЕБЛЕНИЯ БЫТОВОЙ ТЕХНИКИ
Creators: name: Камолходжаев, Жамолиддин
Publisher: name: Zenodo
Year: 2025

description: В условиях роста тарифов на электроэнергию и глобальных вызовов, связанных с изменением климата, многие задумываются о способах снижения энергозатрат. Систематический подход к экономии энергии, выбор бытовой техники и внедрение умных технологий помогут не только снизить расходы, но и внести вклад в охрану окружающей среды. Рассмотрим основные способы и принципы экономии электроэнергии.
Comparing Two Sources of Retail Meat Price Data
Creators: name: Hahn, William F.
name: Perry, Janet E.
name: Southard, Leland W.
name: Hahn, William F.
name: Perry, Janet E.
name: Southard, Leland W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: price spreads
subject: meat
subject: meat pricing
subject: scanner data
subject: retail prices
subject: retail meat prices
subject: farm-to-retail

description: The livestock industry uses information on meat prices at different stages in the marketing system to make production decisions. When grocery stores began using electronic scanners to capture prices paid for meat, it was assumed that the livestock industry could capitalize on having these point-of-sale data available as a measure of the value of its products. This report compares scanner price data with publicly available data collected by the U.S. Department of Labor’s Bureau of Labor Statistics (BLS). Of the two data types, scanner data provide more information about retail meat markets, including a wider variety of meat-cut prices, multiple measures of an average price, the volume of sales, and the relative importance of discounted prices. The scanner data sample, however, is not statistically drawn, and complicated processing requirements delay its release, which makes scanner data less useful than BLS data for analyzing current market conditions.
Growth and Equity Effects of Agricultural Marketing Efficiency Gains in India
Creators: name: Landes, Maurice R.
name: Burfisher, Mary E.
name: Landes, Maurice R.
name: Burfisher, Mary E.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: India
subject: agriculture
subject: policy reform
subject: marketing efficiency
subject: tariffs
subject: subsidies
subject: households
subject: computable general equilibrium model.

description: Agriculture is the largest source of employment in India, and food accounts for about half of consumer expenditures. Moving agricultural products from the farm to consumers more efficiently could result in large gains to producers, consumers, and India’s overall economy. This analysis uses a computable general equilibrium model with agricultural commodity detail and households disaggregated by rural, urban, and income class to study the potential impacts of reforms that achieve efficiency gains in agricultural marketing and reduce agricultural input subsidies and import tariffs. More efficient agricultural marketing generates economywide gains in output and wages, raises agricultural producer prices, reduces consumer food prices, and increases private consumption, particularly by low-income households. These gains could help to offset some of the medium-term adjustment costs for some commodity markets and households associated with reducing agricultural subsidies and tariffs.
Approximate optimization of MAXCUT with a local spin algorithm
Creators: name: Bapat, Aniruddha
name: Jordan, Stephen P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Local tensor methods are a class of optimization algorithms that was introduced in [Hastings,arXiv:1905.07047v2][1] as a classical analogue of the quantum approximate optimization algorithm (QAOA). These algorithms treat the cost function as a Hamiltonian on spin degrees of freedom and simulate the relaxation of the system to a low energy configuration using local update rules on the spins. Whereas the emphasis in [1] was on theoretical worst-case analysis, we here investigate performance in practice through benchmarking experiments on instances of the MAXCUT problem.Through heuristic arguments we propose formulas for choosing the hyperparameters of the algorithm which are found to be in good agreement with the optimal choices determined from experiment. We observe that the local tensor method is closely related to gradient descent on a relaxation of maxcut to continuous variables, but consistently outperforms gradient descent in all instances tested. We find time to solution achieved by the local tensor method is highly uncorrelated with that achieved by a widely used commercial optimization package; on some MAXCUT instances the local tensor method beats the commercial solver in time to solution by up to two orders of magnitude and vice-versa. Finally, we argue that the local tensor method closely follows discretized, imaginary-time dynamics of the system under the problem Hamiltonian.
description: 12 pages, 9 figures, 2 tables
A 3D Spectral Anelastic Hydrodynamic Code for Shearing, Stratified Flows
Creators: name: Barranco, Joseph A.
name: Marcus, Philip S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have developed a three-dimensional (3D) spectral hydrodynamic code to study vortex dynamics in rotating, shearing, stratified systems (e.g. the atmosphere of gas giant planets, protoplanetary disks around newly forming protostars). The time-independent background state is stably stratified in the vertical direction and has a unidirectional linear shear flow aligned with one horizontal axis. Superposed on this background state is an unsteady, subsonic flow that is evolved with the Euler equations subject to the anelastic approximation to filter acoustic phenomena. A Fourier-Fourier basis in a set of quasi-Lagrangian coordinates that advect with the background shear is used for spectral expansions in the two horizontal directions. For the vertical direction, two different sets of basis functions have been implemented: (1) Chebyshev polynomials on a truncated, finite domain, and (2) rational Chebyshev functions on an infinite domain. Use of this latter set is equivalent to transforming the infinite domain to a finite one with a cotangent mapping, and using cosine and sine expansions in the mapped coordinate. The nonlinear advection terms are time integrated explicitly, whereas the Coriolis force, buoyancy terms, and pressure/enthalpy gradient are integrated semi-implicitly. We show that internal gravity waves can be damped by adding new terms to the Euler equations. The code exhibits excellent parallel performance with the Message Passing Interface (MPI). As a demonstration of the code, we simulate the merger of two 3D vortices in the midplane of a protoplanetary disk.
description: Submitted to JCP, 36 pages, 9 figures (1 color), For higher quality figures, see http://www.cfa.harvard.edu/~jbarranco
Correlated two-photon imaging with true thermal light
Creators: name: Zhang, Da
name: Chen, Xi-Hao
name: Zhai, Yan-Hua
name: Wu, Ling-An
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report the first experimental demonstration of two-photon correlated imaging with true thermal light from a hollow cathode lamp. The coherence time of the source is much shorter than that of previous experiments using random scattered light from a laser. A two-pinhole mask was used as object, and the corresponding thin lens equation was well satisfied. Since thermal light sources are easier to obtain and measure than entangled light it is conceivable that they may be used in special imaging applications.
description: 3 pages, 5 figures, accepted by Optics Letters
Who Has Time To Cook? How Family Resources Influence Food Preparation
Creators: name: Mancino, Lisa
name: Newman, Constance
name: Mancino, Lisa
name: Newman, Constance
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Food preparation
subject: Tobit analysis
subject: time use
subject: Thrifty Food Plan

description: Households participating in the Food Stamp Program are increasingly headed by a single parent or two working parents. As this trend continues, more low-income households may find it difficult to allocate the time needed to prepare meals that fit within a limited budget and meet dietary requirements. Using Tobit analysis of the 2003-04 American Time Use Survey (ATUS), this study finds that household time resources significantly affect how much time is allocated to preparing food. In fact, working full-time and being a single parent appear to have a larger impact on time allocated to food preparation than an individual’s earnings or household income do. The results are relevant for the design of food assistance programs as well as for improving our understanding of how different family time resources affect consumption behavior.
Additional file 4 of A chromosome-level assembly of the cat flea genome uncovers rampant gene duplication and genome size plasticity
Creators: name: Driscoll, Timothy P.
name: Verhoeve, Victoria I.
name: Gillespie, Joseph J.
name: J. Spencer Johnston
name: Guillotte, Mark L.
name: Rennoll-Bankert, Kristen E.
name: M. Sayeedur Rahman
name: Hagen, Darren
name: Elsik, Christine G.
name: Macaluso, Kevin R.
name: Azad, Abdu F.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4: Figure S3. Phylogenomics analysis of select Holometabola. (A) Assessment of holometabolan accessory genomes. (B) Top: Identification of conserved protein families present in select taxa from each holometabolan order but absent from C. felis. Bottom: Protein families conserved across all sequenced holometabolan genomes except C. felis (see Additional file 5: Table S2). Four assemblies were identified as particularly patchy (Oryctes borbonicus, Operophtera brumata, Heliothis virescens, and Plutella xylostella) and 100% conservation (“perfect”) was also relaxed to exclude these taxa. Inset, redrawn phylogeny estimation of Holometabola [2].
RG and logarithmic CFT multicritical properties of randomly diluted Ising models
Creators: name: Zinati, Riccardo Ben Alì
name: Zanusso, Omar
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss how a spin system, which is subject to quenched disorder, might exhibit multicritical behaviors at criticality if the distribution of the impurities is arbitrary. In order to provide realistic candidates for such multicritical behaviors, we discuss several generalizations of the standard randomly diluted Ising's universality class adopting the $ε$-expansion close to several upper critical dimensions. In the presentation, we spend a special effort in bridging between CFT and RG results and discuss in detail the computation of quantities, which are of prominent interest in the case of logarithmic CFT.
Improving menu placement strategies for pen input
Creators: name: Hancock, Mark S.
Publisher: name: University of British Columbia
Year: 2009

description: Pen-based interaction is becoming a commonplace two degree-of-freedom alternative to the mouse. The use of pen input allows users to acquire targets directly on a computer display. This style of interaction introduces a unique form factor and a new set of considerations in the design of applications for such devices. This thesis presents a series of experiments designed to evaluate the use of pen-input devices on a variety of display setups. In particular, user performance is investigated in terms of menu selections in circular and rectangular pop-up menus using stylus-driven direct input on horizontal and vertical display surfaces. These studies help to clarify effects of hand posture and hand preference. The results of these studies show that both left-handed and right-handed users demonstrate a consistent, but mirrored pattern of selection times that is corroborated by qualitative measures of user preference. This pattern is different for both vertical and horizontal displays due to a change in hand posture. Implementation details are provided for an automatic menu placement strategy for a tabletop display. Details are presented on how to detect which hand is being used to hold the device and on how to apply the results of the study to display rectangular pop-up menus in a co-located collaborative environment.
Buckled nano rod - a two state system and its dynamics
Creators: name: Chakraborty, Aniruddha
name: Bagchi, Sayan
name: Sebastian, K. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider a suspended elastic rod under longitudinal compression. The compression can be used to adjust potential energy for transverse displacements from harmonic to double well regime. The two minima in potential energy curve describe two possible buckled states at a particular strain. Using transition state theory (TST) we have calculated the rate of conversion from one state to other. If the strain $ε$ is between $ε_c$ and $4 ε_c$, the saddle point is the straight rod. But for $ε_c < 4 ε_c$, the saddle is S-shaped. At $ε_c = 4 ε_c$ the simple TST rate diverges. We suggest methods to correct this divergence, both for classical and quantum calculations. We also find that zero point energy contributions can be quite large (as large as $10^9$) so that single mode calculations can lead to large errors in the rate.
description: 8 pages, 8 figures
Devising A Method of ‘Expected Damage’ Estimation for a Polyphagous Invertebrate Pest Exotic to Western Australia
Creators: name: Cook, David C.
name: Cook, David C.
Publisher: name: Unknown
Year: 2003
Subjects: Environmental Economics and Policy

description: With increasing efficiency in human and freight transport fuelled by the creation of the global market place, pressure is mounting on quarantine administrators to target their resources strategically. A managed approach to decision-making is therefore becoming an integral part of quarantine management since target species and/or entry pathways must be identified and policed effectively. Using the example of Melon Thrips in Western Australia, this paper presents an economic framework that allows decision-makers to prioritise exotic pests based on the damage and production cost increases they are capable of imposing on affected industries. In doing so it identifies a critical level of expected damage associated with the pest that can then be used as a ceiling for incursion response expenditure.
On the 3D Relativistic Vlasov-Maxwell System with large Maxwell field
Creators: name: Wei, Dongyi
name: Yang, Shiwu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: This paper is devoted to the study of relativistic Vlasov-Maxwell system in three space dimension. For a class of large initial data, we prove the global existence of classical solution with sharp decay estimate. The initial Maxwell field is allowed to be arbitrarily large and the initial density distribution is assumed to be small and decay with rate $(1+|x|+|v|)^{-9-}$. In particular, there is no restriction on the support of the initial data.
description: 29 pages, comments are welcome!
Additional file 3 of Local knowledge about sustainable harvesting and availability of wild medicinal plant species in Lemnos island, Greece
Creators: name: Papageorgiou, Dimitrios
name: Bebeli, Penelope J.
name: Panitsa, Maria
name: Schunko, Christoph
Publisher: name: figshare
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy
subject: Plant Biology
subject: 60506 Virology

description: Additional file 3. Susceptibility assessment of the most frequently collected wild medicinal plants taxa (f>3) to overcollection (n=16).
Rotations, Risk and Reward: Farming system choice on the Eyre Peninsula of South Australia
Creators: name: Cooper, Ian M.
name: Nguyen, Nam C.
name: Hancock, Jon
name: Cooper, Ian M.
name: Nguyen, Nam C.
name: Hancock, Jon
Publisher: name: Unknown
Year: 2003
Subjects: Farm Management
Land Economics/Use

description: A farming systems and rotations trial was conducted at Minnipa on the Eyre Peninsula of South Australia between 1995 and 2001. The results have been presented to local farmers as simple gross margin comparisons (with a relatively low value for the pasture phase if present) in extension publications. The results are reassessed in terms of increased livestock return, and allowing for permanent/family labour and machinery overheads. The relative risk vs return is also considered to explain the acceptance of the research by local farmers.
State Government support for WA farmers experiencing adverse seasons in 1998 to 2001: A comment
Creators: name: Coyle, Peter
name: Mayberry, Chris
name: Coyle, Peter
name: Mayberry, Chris
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: adverse weather
subject: drought relief policy

description: In response to a series of adverse weather events, in parts of the cereal crop belt from 1998 to 2001, the State and the Commonwealth Governments implemented support measures for farmers in the cereal belt of Western Australia. A critique of the State Government Adverse Seasonal Conditions in the Agricultural Sector (ASCAS) support packages is presented. The schemes are expensive, could adversely affect the normal adjustment process, have subjective boundaries, deliver grants to some multi millionaires, attract a small element of clearly ineligible claimants, and in 2001 the second ASCAS package was provided prior to excellent late winter and spring rains.
Electric capacitance as nanocondensers in zigzag nanographite ribbons
Creators: name: Harigaya, Kikuo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electronic states in nanographite ribbons with zigzag edges are studied using the extended Hubbard model with nearest neighbor Coulomb interactions. The nearest Coulomb interactions stabilize electronic states with the opposite electric charges separated and localized along both edges. Such states are analogous as nanocondensers. Therefore, electric capacitance, defined using a relation of polarizability, is calculated to examine nano functionalities. We find that the behavior of the capacitance is widely different depending on whether the system is in the magnetic or charge polarized phases. In the magnetic phase, the capacitance is dominated by the presence of the edge states while the ribbon width is small. As the ribbon becomes wider, the capacitance remains with large magnitudes as the system develops into metallic zigzag nanotubes. It is proportional to the inverse of the width, when the system corresponds to the semiconducting nanotubes and the system is in the charge polarized phase also. The latter behavior could be understood by the presence of an energy gap for charge excitations.
description: 11 pages; 7 figures; accepted for publication in Japanese Journal of Applied Physics
HST Proper Motions of NGC 147 and NGC 185: Orbital Histories and Test of Dynamically Coherent Andromeda Satellite Plane
Creators: name: Sohn, Sangmo Tony
name: Patel, Ekta
name: Fardal, Mark A.
name: Besla, Gurtina
name: van der Marel, Roeland P.
name: Geha, Marla
name: Guhathakurta, Puragra
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first proper motion (PM) measurements for the dwarf elliptical galaxies NGC 147 and NGC 185, two satellite galaxies of M31, using multi-epoch HST imaging data with time baselines of $\sim 8$ years. For each galaxy, we take an error-weighted average of measurements from HST ACS/WFC and WFC3/UVIS to determine the PMs. Our final results for the PMs are $(μ_\mathrm{W}, μ_\mathrm{N})_\mathrm{N147} = (-0.0232, 0.0378) \pm (0.0143, 0.0146)\,\mathrm{mas}\,\mathrm{yr}^{-1}$ for NGC 147, and $(μ_\mathrm{W}, μ_\mathrm{N})_\mathrm{N185} = (-0.0242, 0.0058) \pm (0.0141, 0.0147)\,\mathrm{mas}\,\mathrm{yr}^{-1}$ for NGC 185. The 2-dimensional direction of motion for NGC 147 about M31 is found to be aligned with its tidal tails. The 3-d positions and velocities of both galaxies are transformed into a common M31-centric coordinate system to study the detailed orbital histories of the combined M31+NGC 147+NGC 185 system via numerical orbit integration. We find that NGC 147 (NGC 185) had its closest passage to M31 0.3-0.5~Gyr ($\gtrsim 1.6$~Gyr) within the past 6 Gyr at distances of $\sim 70$ kpc (70-260 kpc). The pericentric times of NGC 147/NGC 185 correlate qualitatively well with the presence/absence of tidal tails seen around the galaxies. Our PMs show that the orbital poles of NGC 147, and also NGC 185 albeit to a lesser degree, agree within the uncertainties with the normal of the Great Plane of Andromeda (GPoA). These are the first measurements of the 3-d angular momentum vector of any satellite identified as original GPoA members. Our results strengthen the hypothesis that the GPoA may be a dynamically coherent entity. We revisit previous claims that NGC 147 and NGC 185 are binary galaxies and conclude that it is very unlikely the two galaxies were ever gravitationally bound to each other.
description: 20 pages, 9 figures, 4 tables, accepted for publication in ApJ
Gluonic excitation of non-exotic hybrid charmonium from lattice QCD
Creators: name: Luo, Xiang-Qian
name: Liu, Yan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The ground and first excited states of the hybrid charmonium ${\bar c} c g$, with non-exotic quantum numbers $J^{PC}=0^{-+}$, $1^{--}$ and $1^{++}$ are investigated using quenched lattice QCD. They are completely ignored in the literature, only because their ground states are degenerate with $η_c$, $J/ψ$, and $χ_{c1}$, and are difficult to be distinguished from these conventional charmonium mesons in experiment. However, we observe strong gluonic radial excitations in the first excited states; We predict that their masses are 4.352(225)GeV, 4.379(149)GeV and 7.315(257)GeV, completely different from the first excited states of the corresponding conventional charmonium. Their relevance to the recent discovery of the Y(4260) state and future experimental search for other states are also discussed.
description: Different analysis methods were used for a cross check, leading to consistent results
Scaling law of transient lifetime of chimera states under dimension-augmenting perturbations
Creators: name: Kong, Ling-Wei
name: Lai, Ying-Cheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Chimera states arising in the classic Kuramoto system of two-dimensional phase coupled oscillators are transient but they are "long" transients in the sense that the average transient lifetime grows exponentially with the system size. For reasonably large systems, e.g., those consisting of a few hundreds oscillators, it is infeasible to numerically calculate or experimentally measure the average lifetime, so the chimera states are practically permanent. We find that small perturbations in the third dimension, which make system "slightly" three-dimensional, will reduce dramatically the transient lifetime. In particular, under such a perturbation, the practically infinite average transient lifetime will become extremely short, because it scales with the magnitude of the perturbation only logarithmically. Physically, this means that a reduction in the perturbation strength over many orders of magnitude, insofar as it is not zero, would result in only an incremental increase in the lifetime. The uncovered type of fragility of chimera states raises concerns about their observability in physical systems.
description: 15 pages, 13 figures
Charged particles on a 2D plane subject to anisotropic Jahn-Teller interactions
Creators: name: Mertelj, T.
name: Kabanov, V. V.
name: Mihailovic, D.
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 properties of a system of charged particles on a 2D lattice, subject to an anisotropic Jahn-Teller-type interaction and 3D Coulomb repulsion are investigated. In the mean-field approximation without Coulomb interaction, the system displays a phase transition of first order. When the long range Coulomb interaction is included, Monte Carlo simulations show that the system displays very diverse mesoscopic textures, ranging from spatially disordered pairs to ordered arrays of stripes, or charged clusters, depending only on the ratio of the two interactions (and the particle density). Remarkably, charged objects with even number of particles are more stable than with odd number of particles. We suggest that the diverse functional behaviour - including superconductivity - observed in oxides can be thought to arise from the self-organization of this type.
description: To appera in PRL
A Composite Solution to the Neutron Bottle Anomaly
Creators: name: Rajendran, Surjeet
name: Ramani, Harikrishnan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements of the lifetime of neutrons trapped in a bottle have been consistently shorter than the lifetime measured in neutron beam experiments. With trapping potentials as low as 50 neV and neutron detectors located only at the top of the bottle, this discrepancy could be the result of the soft scattering of dark matter with neutrons. However, it is challenging to obtain the observed loss rate in conventional models of dark matter scattering. We show that this phenomenology is possible in composite models of dark matter where the soft scattering is from dark matter that has been captured and accumulated in the earth. This solution can be tested by placing more neutron detectors around the trap, providing better angular coverage. The phenomenology of soft scattering by trapped composite dark matter is generic and suggests new experimental directions that could be pursued to detect this large class of models.
description: 11 pages and 2 figures
Orbital Bi-Stripes in High Doped Bilayer Manganites
Creators: name: Beale, T. A. W.
name: Spencer, P. D.
name: Hatton, P. D.
name: Wilkins, S. B.
name: von Zimmermann, M.
name: Brown, S. D.
name: Prabhakaran, D.
name: Boothroyd, A. T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present high resolution high energy and resonant x-ray diffraction results from La2-2xSr1+2xMn2O7 for x=0.55,0.575 and 0.60. These compounds show superlattice reflections at wavevectors of (h+-δ,k+-δ,l) and (h+-2δ,k+-2δ,l), arising from orbital ordering with associated Jahn-Teller distortions and charge ordering respectively. We observe a phase transition between the x=0.55 and x=0.575 doping levels. Samples with x=0.55 display structural characteristics similar to those previously reported for x=0.5. Compared to this, the long range order in samples with x=0.55 and x=0.6 have a distinct change in wavevector and correlation. We attribute this to a new orbital bi-stripe phase, accompanied by weak, frustrated, charge ordering. The observed azimuthal dependence of the orbital order reflections supports the model proposed for this new phase.
description: 8 pages, 9 figures
Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots
Creators: name: Moriyama, S.
name: Fuse, T.
name: Suzuki, M.
name: Aoyagi, Y.
name: Ishibashi, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Low-temperature transport measurements have been carried out on single-wall carbon nanotube quantum dots in a weakly coupled regime in magnetic fields up to 8 Tesla. Four-electron shell filling was observed, and the magnetic field evolution of each Coulomb peak was investigated, in which magnetic field induced spin flip and resulting spin polarization were observed. Excitation spectroscopy measurements have revealed Zeeman splitting of single particle states for one electron in the shell, and demonstrated singlet and triplet states with direct observation of the exchange splitting at zero-magnetic field for two electrons in the shell, the simplest example of the Hund's rule. The latter indicates the direct analogy to an artificial He atom.
description: 4 pages, 3 figures, submitted to Physical Review Letters
Strategies for particle resampling in PIC simulations
Creators: name: Muraviev, A.
name: Bashinov, A.
name: Efimenko, E.
name: Volokitin, V.
name: Meyerov, I.
name: Gonoskov, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In particle-in-cell simulations, excessive or even unfeasible computational demands can be caused by the growth of the number of particles in the course of prolific ionization or cascaded pair production due to the effects of quantum electrodynamics. Here we discuss how one can organize a dynamic rearrangement of the ensemble to reduce the number of macroparticles, while maintaining acceptable sampling of an arbitrary particle distribution. The approaches of merging and thinning as well as their variants are discussed and the aspects of use are considered.
Aphids : a mobile agent-based programmable hybrid intrusion detection and analysis system
Creators: name: Deeter, Ken
Publisher: name: University of British Columbia
Year: 2009

description: Intrusion detection systems are quickly becoming a standard requirement in building a network security infrastructure. Although many established techniques and commercial products exist, their effectiveness leaves room for improvement. This thesis documents a design and prototype implementation of a modular, mobile agent-based intrusion detection framework, known as APHIDS. This framework provides a platform for performing distributed monitoring, search, and analysis tasks while realizing the benefits of the mobile agent model. Its modular design allows simple extension and adaptation to a large variety of scenarios. Several baseline performance measurements are accompanied by a theoretical framework to describe the performance implications of using mobile agents for intrusion detection-related tasks.
The Transient Responses of An Axisymmetric Tropical Cyclone to Instantaneous Surface Roughening and Drying. Part I: Numerical Experiments
Creators: name: Chen, Jie
name: Chavas, Daniel R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Inland tropical cyclone (TC) impacts due to high winds and rainfall-induced flooding depend strongly on the evolution of the wind field and precipitation distribution after landfall. However, research has yet to test the detailed response of a mature TC and its hazards to changes in surface forcing in idealized settings. This work tests the transient response of an idealized hurricane to instantaneous transitions in two key surface properties associated with landfall: surface roughening and drying. Simplified axisymmetric experiments are performed in CM1 where surface drag coefficient and evaporative fraction are each systematically modified beneath a mature hurricane. Surface drying stabilizes the eyewall and consequently weakens the overturning circulation, thereby reducing inward angular momentum transport that slowly decays the wind field only within the inner-core. In contrast, surface roughening initially ($\sim$12 hours) rapidly weakens the entire low-level wind field and enhances the overturning circulation dynamically despite the concurrent thermodynamic stabilization of the eyewall; thereafter the storm gradually decays similar to drying. As a result, total precipitation temporarily increases with roughening but uniformly decreases with drying. Storm size decreases monotonically and rapidly with surface roughening, while the radius of maximum wind can increase with moderate surface drying. Overall, this work provides a mechanistic foundation for understanding the inland evolution of real storms in nature.
High-resolution survey for planetary companions to young stars in the Taurus Molecular Cloud
Creators: name: Wallace, A. L.
name: Kammerer, J.
name: Ireland, M. J.
name: Federrath, C.
name: Kraus, A. L.
name: Maddison, S. T.
name: Rizzuto, A. C.
name: Birchall, E. K.
name: Martinache, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Direct imaging in the infrared at the diffraction limit of large telescopes is a unique probe of the properties of young planetary systems. We survey 55 single class I and class II stars in Taurus in the L' filter using natural and laser guide star adaptive optics and the near-infrared camera (NIRC2) of the Keck II telescope, in order to search for planetary mass companions. We use both reference star differential imaging and kernel phase techniques, achieving typical 5-sigma contrasts of ~6 magnitudes at separations of 0.2" and ~8 magnitudes beyond 0.5". Although we do not detect any new faint companions, we constrain the frequency of wide separation massive planets, such as HR 8799 analogues. We find that, assuming hot-start models and a planet distribution with power-law mass and semi-major axis indices of -0.5 and -1, respectively, less than 20% of our target stars host planets with masses >2 MJ at separations >10 AU.
description: 16 pages, 14 figures, accepted for publication in MNRAS
Offeren Crist
Offeren Crist
Creators: name: Jenner, Henry (1848-1934)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2023

description: Relation: https://bibnumcrbc.huma-num.fr/document/5276
description: Audience: Ar Fusteg, Yann (1855-1910)
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Excitations in correlated superfluids near a continuous transition into a supersolid
Creators: name: Zhao, Erhai
name: Paramekanti, Arun
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: We study a superfluid on a lattice close to a transition into a supersolid phase and show that a uniform superflow in the homogeneous superfluid can drive the roton gap to zero. This leads to supersolid order around the vortex core in the superfluid, with the size of the modulated pattern around the core being related to the bulk superfluid density and roton gap. We also study the electronic tunneling density of states for a uniform superconductor near a phase transition into a supersolid phase. Implications are considered for strongly correlated superconductors.
description: 4 pages, 2 figures, published version
Personality, Objectives, Attitudes, Intentions and Behaviour: Modelling the Adoption of Current Recommended Practice by Farmers in the NSW Murray Catchment
Creators: name: Crase, Lin
name: Maybery, Darryl
name: Crase, Lin
name: Maybery, Darryl
Publisher: name: Unknown
Year: 2003
Subjects: Resource /Energy Economics and Policy

description: The degradation of the natural resource base that derives from unsustainable farm practices is of major concern in Australia. Confronted with mounting evidence of the extent of this degradation, governments have employed a variety of policy instruments to induce change amongst the farming community. However, there remains a widely-held view that the rate of adoption of alternative practices falls well short of that required to avert disaster and additional measures are required to accelerate change. In this context, an understanding of the processes that lead particular farmers to adopt current recommended practices would provide valuable insights to assist policy formulation. Whilst some work has been undertaken in this area, a major deficiency resides in the failure to acknowledge the important role of ‘with-person’ factors, like personality and values or objectives. This paper reports the results of a study that deliberately set about to measure these within-person variables to enable policy makers to focus on those attributes most susceptible to change. Data were collected from over 500 farmers in the NSW Murray catchment which enabled the isolation of the farmers’ personality, objectives and attitudes to different farming practices. The results provide a useful contrast to other studies in this field by highlighting those aspects of the farmers’ decision that are most malleable to policy intervention.
Spinning Black Holes Fall in Love
Creators: name: Tiec, Alexandre Le
name: Casals, Marc
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The open question of whether a black hole can become tidally deformed by an external gravitational field has profound implications for fundamental physics, astrophysics and gravitational-wave astronomy. Love tensors characterize the tidal deformability of compact objects such as astrophysical (Kerr) black holes under an external static tidal field. We prove that all Love tensors vanish identically for a Kerr black hole in the nonspinning limit or for an axisymmetric tidal perturbation. In contrast to this result, we show that Love tensors are generically nonzero for a spinning black hole. Specifically, to linear order in the Kerr black hole spin and the weak perturbing tidal field, we compute in closed form the Love tensors that couple the mass-type and current-type quadrupole moments to the electric-type and magnetic-type quadrupolar tidal fields. For a dimensionless spin ~ 0.1, the nonvanishing quadrupolar Love tensors are ~ 0.002, thus showing that black holes are particularly "rigid" compact objects.
description: 7 pages; matches version accepted in Phys. Rev. Lett
Agri-environmental conservation – the case for an environmental levy
Creators: name: Crean, Jason
name: Crean, Jason
Publisher: name: Unknown
Year: 2003
Subjects: subject: Environmental Economics and Policy
subject: Environment
subject: cost-sharing
subject: property rights

description: Recent environmental assessments have highlighted the extent of land degradation in Australia and the significant costs involved in addressing it. With projected investment costs running into tens of billions of dollars, it is not surprising that greater attention is now being focussed on who should pay. One idea gathering significant momentum has been the imposition of an environmental levy. Such a levy would raise public funds to be spent on resource degradation issues and has been proposed to work through the taxation system in a similar fashion to the Medicare levy, albeit for a more limited 10 year period. The paper assesses the arguments behind the imposition of an environmental levy and considers some of the issues associated with its effective implementation. Particular challenges in the establishment of environmental priorities, public and private attributes of environmental problems and the institutional arrangements for levy collection and management are identified and discussed.
Parameter Estimation of Fire Propagation Models Using Level Set Methods
Creators: name: Alessandri, Angelo
name: Bagnerini, Patrizia
name: Gaggero, Mauro
name: Mantelli, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The availability of wildland fire propagation models with parameters estimated in an accurate way starting from measurements of fire fronts is crucial to predict the evolution of fire and allocate resources for firefighting. Thus, we propose an approach to estimate the parameters of a wildland fire propagation model combining an empirical fire spread rate and level set methods to describe the evolution of the fire front over time and space. After validating the model, the estimation of parameters in the spread rate is performed by using fire front shapes measured at different time instants as well as wind velocity and direction, landscape elevation, and vegetation distribution. Parameter estimation is performed by solving an optimization problem, where the objective function to be minimized is the symmetric difference between predicted and measured fronts. Numerical results obtained by the application of the proposed method are reported in two simulated scenarios and in an application case study using real data of the 2002 Troy fire in Southern California, thus showing the effectiveness of the proposed approach.
Whole farm considerations in the design of management agreements
Creators: name: Crosthwaite, Jim
name: Crosthwaite, Jim
Publisher: name: Unknown
Year: 2003
Subjects: Farm Management

description: Management agreements for the delivery of environmental services by farmers typically relate to that part of the farm that is of immediate public interest. However, the decision-making unit with which the farmer is primarily concerned is the farm business as a whole. This provides the context within which any particular area of the farm is managed. In this paper, the importance that a focus on the wider farm context might hold for achievement of conservation outcomes is shown by drawing on economic theory as well as recent case studies of farm businesses. Factors likely to influence conservation outcomes are: motives and other behavioural influences, character of production processes and farmer routines, potential to define alternative farm futures, uncertainty, capabilities of the farm manager and resources available to them. These factors have implications for how economists approach key issues in design of management agreements - information asymmetry, cost (including transaction cost) and encouraging proactive rather than reactive behaviour by the economic agent. Whole farm considerations will be taken into account by farmers in their decisions about whether to participate in management agreements, and in the terms of that participation. In this paper, explicit attention is given to opportunities that the principal has to address whole farm considerations. These opportunities can be addressed in the assessment process, in preconditions, as part of the management agreement, or as complementary mechanisms. The purpose of the paper is to highlight these opportunities, and to discuss their pros and cons. Tentative conclusions are drawn, and further research into this previously unexplored topic is proposed.
Isabella Augart; Rahmenbilder. Konfigurationen der Verehrung im frühneuzeitlichen Italien
Creators: name: Zierholz, Steffen
Publisher: name: Journal für Kunstgeschichte
Year: 2024

description: Rezension zu: Isabella Augart; Rahmenbilder. Konfigurationen der Verehrung im frühneuzeitlichen Italien (Italienische Forschungen des Kunsthistorischen Instituts in Florenz, Max-Planck-Institut, I Mandorli 25); Berlin/München: Deutscher Kunstverlag 2018; 352 S., 10 farb. u. 107 s/w-Abb.; ISBN 978-3-422-07486-6
description: Journal für Kunstgeschichte, Bd. 24 Nr. 3 (2020): Journal für Kunstgeschichte