cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Very high-energy gamma rays from GRB 180720B and GRB 190829A with external Compton emission
Creators: name: Barnard, Monica
name: Razzaque, Soebur
name: Joshi, Jagdish C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray bursts (GRBs) comprise of short, bright, energetic flashes of emission from extragalactic sources followed by a longer afterglow phase of decreased brightness. Recent discoveries of very-high-energy (VHE, $\gtrsim 100$ GeV) afterglow emission from GRB 180720B and GRB 190829A by H.E.S.S. have raised questions regarding the emission mechanism responsible. We interpret these observed late-time emission to be the result of inverse Compton emission of ultra-relativistic electrons in the GRB blastwave in an external radiation field, i.e., external Compton (EC), considering both the wind and interstellar medium scenarios. We present predictions of multiwavelength light curves and energy spectra, ranging from optical to VHE, and include the synchrotron and synchrotron self-Compton (SSC) radiation mechanisms as well. We corrected the EC and SSC model for the $γ$-ray attenuation by absorption of photons through their interaction with the extragalactic background light (EBL). We compared our results to multiwavelength data and found that EC gives a satisfactory fit for a given set of fixed model parameters for GRB 180720B, whereas SSC result in a better fit for GRB 190829A. For both GRBs a wind environment is preferred over constant density inter-stellar medium, and the Cosmic Microwave Background as the external radiation field. However, with more data and an effective optimisation tool we can find a more robust fit of the model, implying better constraints on the GRB environment and the particle energy requirements for the emission observed at late times. This has consequences for future observations of GRBs at these extreme energies.
description: 7 pages, 5 figures, accepted for publication in MNRAS
LIVESTOCK PRODUCTION POLICIES AND MEAT PROCESSING MARGINS: THE CASE OF NEW ZEALAND, 1967-1988
Creators: name: Griffith, Garry R.
name: Moore, Walter B.
name: Griffith, Garry R.
name: Moore, Walter B.
Publisher: name: Unknown
Year: 1991
Subjects: Production Economics
Productivity Analysis

description: The New Zealand export meat industry has been through a considerable number of changes in the 1980s. The deregulation of export slaughter facilities, Supplementary Minimum Prices, Producer Board intervention, declining livestock numbers and domestic cost pressures have all affected the performance of the domestically based processing sector. Major changes in market access and demand have influenced off-shore marketing operations, particularly for sheepmeats. Additionally, there has been a change in the type of meat exported with a greater proportion of further processed product shipped in recent years. As an example of the impact of these developments on livestock producers, the producer share of the United Kingdom wholesale market return for a representative prime lamb carcase has fallen from 40 per cent in 1978 to 25 per cent in 1988. In this article the pattern of intervention in the New Zealand pastoral meat industries from the mid-1960s is detailed, emphasising the different environments of the beef and sheepmeat enterprises. Then the principal factors influencing domestic processing margins for these products are empirically examined. Alternative model specifications and alternative estimation techniques are compared and contrasted. The results of these analyses are discussed in terms of the historical patterns of assistance and structural change, and in terms of current rationalisation pressures on the meat processing sector.
Privacy threats in intimate relationships
Creators: name: Levy, Karen
name: Schneier, Bruce
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: This article provides an overview of intimate threats: a class of privacy threats that can arise within our families, romantic partnerships, close friendships, and caregiving relationships. Many common assumptions about privacy are upended in the context of these relationships, and many otherwise effective protective measures fail when applied to intimate threats. Those closest to us know the answers to our secret questions, have access to our devices, and can exercise coercive power over us. We survey a range of intimate relationships and describe their common features. Based on these features, we explore implications for both technical privacy design and policy, and offer design recommendations for ameliorating intimate privacy risks.
Milliarcsecond-scale radio structure of the most distant BL Lac object candidate at redshift 6.57
Creators: name: Frey, S.
name: Zhang, Y.
name: Perger, K.
name: An, T.
name: Gabányi, K. É.
name: Gurvits, L. I.
name: Hwang, C. -Y.
name: Koptelova, E.
name: Paragi, Z.
name: Fogasy, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The existence of accreting supermassive black holes up to billions of solar masses at early cosmological epochs (in the context of this work, redshifts z>=6) requires very fast growth rates which is challenging to explain. The presence of a relativistic jet can be a direct indication of activity and accretion status in active galactic nuclei (AGN), constraining the radiative properties of these extreme objects. However, known jetted AGN beyond z~6 are still very rare. The radio-emitting AGN J2331+1129 has recently been claimed as a candidate BL Lac object at redshift z=6.57, based on its synchrotron-dominated emission spectrum and the lack of ultraviolet/optical emission lines. It is a promising candidate for the highest-redshift blazar known to date. The aim of the observations described here was to support or refute the blazar classification of this peculiar source. We performed high-resolution radio interferometric imaging observations of J2331+1129 using the Very Long Baseline Array at 1.6 and 4.9 GHz in 2022 Feb. The images revealed a compact but slightly resolved, flat-spectrum core feature at both frequencies, indicating that the total radio emission is produced by a compact jet and originates from within a central 10-pc scale region. While these are consistent with the radio properties of a BL Lac object, the inferred brightness temperatures are at least an order of magnitude lower than expected from a Doppler-boosted radio jet, leaving the high-redshift BL Lac identification still an open question.
description: 5 pages, 1 figure, accepted for publication in Astronomy & Astrophysics as a Letter to the Editor
Results from NA57
Creators: name: Dainese, Andrea
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The NA57 experiment has measured the production of strange and multi-strange hadrons in heavy-ion collisions at the CERN SPS. After briefly introducing the NA57 apparatus and analysis procedures, we present recent results on strangeness enhancement in Pb-Pb relative to p-Be collisions, on the study of the m_T distributions of strange particles, and on central-to-peripheral nuclear modification factors in Pb-Pb collisions at top SPS energy.
description: 8 pages, 5 figures, proceeding of plenary talk at Quark Matter 2005
Stacked adaptive dynamic programming with unknown system model
Creators: name: Osinenko, Pavel
name: Göhrt, Thomas
name: Devadze, Grigory
name: Streif, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Adaptive dynamic programming is a collective term for a variety of approaches to infinite-horizon optimal control. Common to all approaches is approximation of the infinite-horizon cost function based on dynamic programming philosophy. Typically, they also require knowledge of a dynamical model of the system. In the current work, application of adaptive dynamic programming to a system whose dynamical model is unknown to the controller is addressed. In order to realize the control algorithm, a model of the system dynamics is estimated with a Kalman filter. A stacked control scheme to boost the controller performance is suggested. The functioning of the new approach was verified in simulation and compared to the baseline represented by gradient descent on the running cost.
Pairing, quasi-spin and seniority
Creators: name: Agrawal, Bijay Kumar
name: Maheshwari, Bhoomika
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present our concise notes for the lectures and tutorials on pairing, quasi-spin and seniority delivered at SERB school on Role of Symmetries in Nuclear Physics, AMITY University, $2019$. Starting with some generic features of residual nucleon-nucleon interactions, we provide detailed derivation of the matrix elements for the $δ$-interaction which is the basis for the standard pairing Hamiltonian. The eigen values for standard pairing Hamiltonian are then obtained within the quasi-spin formalism. The algebra involving quasi-spin operators is performed explicitly using the annihilation and creation operators for single nucleon together with the application of Wicks theorem. These techniques are expected to be helpful in deriving the mean-field equations for the $Hartree-Fock$, $Bardeen-Cooper-Schrieffer$ and $Hartree-Fock$ Bogoliubov theories.
description: Accepted for publication in European Physical Journal Special Topics for the special issue Role of Symmetries in Nuclear Physics
FACTOR MARKET INCIDENCE OF AGRICULTURAL TRADE LIBERALIZATION: SOME ADDITIONAL RESULTS
Creators: name: Hertel, Thomas W.
name: Hertel, Thomas W.
Publisher: name: Unknown
Year: 1991
Subjects: International Relations/Trade

description: Liberalization of trade implies changes in producer prices, which has consequences for farm income, agricultural employment and asset values. The relative incidence of the effect of changes in prices on fixed factors depends on the rclative magnitude of the Morishima elasticities of substitution in agricultural production.
Multi-image Super Resolution of Remotely Sensed Images using Residual Feature Attention Deep Neural Networks
Creators: name: Salvetti, Francesco
name: Mazzia, Vittorio
name: Khaliq, Aleem
name: Chiaberge, Marcello
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Convolutional Neural Networks (CNNs) have been consistently proved state-of-the-art results in image Super-Resolution (SR), representing an exceptional opportunity for the remote sensing field to extract further information and knowledge from captured data. However, most of the works published in the literature have been focusing on the Single-Image Super-Resolution problem so far. At present, satellite based remote sensing platforms offer huge data availability with high temporal resolution and low spatial resolution. In this context, the presented research proposes a novel residual attention model (RAMS) that efficiently tackles the multi-image super-resolution task, simultaneously exploiting spatial and temporal correlations to combine multiple images. We introduce the mechanism of visual feature attention with 3D convolutions in order to obtain an aware data fusion and information extraction of the multiple low-resolution images, transcending limitations of the local region of convolutional operations. Moreover, having multiple inputs with the same scene, our representation learning network makes extensive use of nestled residual connections to let flow redundant low-frequency signals and focus the computation on more important high-frequency components. Extensive experimentation and evaluations against other available solutions, either for single or multi-image super-resolution, have demonstrated that the proposed deep learning-based solution can be considered state-of-the-art for Multi-Image Super-Resolution for remote sensing applications.
Chaotic Tunneling in a Laser Field
Creators: name: Golo, V. L.
name: Volkov, Yu. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the driven tunneling of a one-dimensional charged particle confined to a rectangular double-well. The numerical simulation of the Schrödinger equation based on the Cranck-Nicholson finite-difference scheme, shows that the modulation of the amplitude of the external field may result in the parametric resonance. The latter is accompanied by the breakdown of the quasi-periodic motion characteristic of the usual driven tunneling, and the emergence of an irregular dynamics. We describe the above breakdown with the occupation probability for the ground state of the unperturbed system, and make the visualization of the irregular dynamics with the help of Shaw-Takens' reconstruction of the state-space. Both approaches agree as to the values of the resonant frequency for the parametric excitation. Our results indicate that the shape of the laser pulse could be essential for generating chaotic tunneling.
description: 4 pages, 3 figures
THE EFFECTS OF FLEXIBLE EXCHANGE RATES ON AUSTRALIAN WOOL PRICES
Creators: name: Phillips, Shauna
name: Bewley, Ronald A.
name: Phillips, Shauna
name: Bewley, Ronald A.
Publisher: name: Unknown
Year: 1991
Subjects: Demand and Price Analysis

description: The implication of price stabilisation under a volatile exchange rate is an increasingly volatile price denominated in a foreign currency. Time series analysis is used to model the relationship between exports, prices and AWC stocks. This model is used to assess the distribution of the impact of exchange rate shocks on prices denominated in local and foreign currencies. It is found that the AWC has significantly reduced the impact of exchange rate shocks on domestic prices.
The ALMA-PILS survey: First detection of the unsaturated 3-carbon molecules Propenal (C$_2$H$_3$CHO) and Propylene (C$_3$H$_6$) towards IRAS 16293$-$2422 B
Creators: name: Manigand, S.
name: Coutens, A.
name: Loison, J. -C.
name: Wakelam, V.
name: Calcutt, H.
name: Müller, H. S. P.
name: Jørgensen, J. K.
name: Taquet, V.
name: Wampfler, S. F.
name: Bourke, T. L.
name: Kulterer, B. M.
name: van Dishoeck, E. F.
name: Drozdovskaya, M. N.
name: Ligterink, N. F. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Complex organic molecules with three carbon atoms are found in the earliest stages of star formation. In particular, propenal (C$_2$H$_3$CHO) is a species of interest due to its implication in the formation of more complex species and even biotic molecules. This study aims to search for the presence of C$_2$H$_3$CHO and other three-carbon species such as propylene (C$_3$H$_6$) in the hot corino region of the low-mass protostellar binary IRAS 16293--2422 to understand their formation pathways. We use ALMA observations in Band 6 and 7 from various surveys to search for the presence of C$_3$H$_6$ and C$_2$H$_3$CHO towards the protostar IRAS 16293--2422 B (IRAS 16293B). We report the detection of both C$_3$H$_6$ and C$_2$H$_3$CHO towards IRAS 16293B, however, no unblended lines were found towards the other component of the binary system, IRAS 16293A. We derive column density upper limits for C$_3$H$_8$, HCCCHO, n-C$_3$H$_7$OH, i-C$_3$H$_7$OH, C$_3$O, and cis-HC(O)CHO towards IRAS 16293B. We then use a three-phase chemical model to simulate the formation of these species in a typical prestellar environment followed by its hydrodynamical collapse until the birth of the central protostar. Different formation paths, such as successive hydrogenation and radical-radical additions on grain surfaces, are tested and compared to the observational results. The simulations reproduce the abundances within one order of magnitude from those observed towards IRAS 16293B, with the best agreement found for a rate of $10^{-12}$ cm$^3$ s$^{-1}$ for the gas-phase reaction C$_3$ + O $\rightarrow$ C$_2$ + CO. Successive hydrogenations of C$_3$, HC(O)CHO, and CH$_3$OCHO on grain surfaces are a major and crucial formation route of complex organics molecules, whereas both successive hydrogenation pathways and radical-radical addition reactions contribute to the formation of C$_2$H$_5$CHO.
description: Accepted for publication in A&A. 24 pages, 17 figures
SOME THOUGHTS ON THE ROLE OF THE AGRICULTURAL ECONOMICS PROFESSION IN AUSTRALIA
Creators: name: Parish, Ross M.
name: Parish, Ross M.
Publisher: name: Unknown
Year: 1969
Subjects: Teaching/Communication/Extension/Profession

description: Does the seemingly disproportionate growth in Australia of agricultural economics, relative to other branches of applied economics, represent a misallocation of educational and research resources? Probably not, since (i) it may be better--because of the existence of increasing returns--to concentrate one's limited resources of economist brainpower in a few fields than to spread them widely; and (ii) the growth of agricultural economics has helped to correct certain weaknesses--particularly in micro-economics and econometrics--in the Australian economics profession as a whole. However, it is suggested that in the future agricultural economists might apply their skills increasingly to non-agricultural problems.
Collective octahedral tilting in ultrathin Ruddlesden-Popper perovskite under terahertz light
Creators: name: Liu, Kun
name: Zhou, Jian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Perovskites have been applied in a wide range of fields such as solar cells and non-volatile memories due to their multiferroic nature and excellent photo-electric conversion capabilities. Recently, two-dimensional (2D) perovskites with a few atomic layers have been successfully synthesized, attracting significant attention for potential applications. In this work, we perform first-principles calculations to investigate an ultrathin prototypical Ruddlesden-Popper phase, $\mathrm{Bi}_2\mathrm{FeO}_4$, with its thickness down to one unit cell. We show that this compound could exist in two (meta-)stable octahedral tilting phases, belonging to $P2_1/c$ and $C2/m$ space groups, respectively. Using the optomechanical theory, we suggest that reversible and non-volatile phase switching can be triggered using non-destructive terahertz light. In addition, the two phases show distinct optical reflectance spectrum in the visible light range, which can be used as an optical probe for phase transformation. This enables both "write" and "read" in an all-optical route.
description: 5 figures, accepted in Appl. Phys. Lett
MANAGEMENT GAMES AND THE TEACHING OF FARM MANAGEMENT
Creators: name: Longworth, John W.
name: Longworth, John W.
Publisher: name: Unknown
Year: 1969
Subjects: Farm Management
Teaching/Communication/Extension/Profession

description: The concept of a farm management game is explained, and the relationships between simulation, games and Monte Carlo techniques are discussed. The potential role of farm management games in improving the teaching of farm management is reviewed. The management game is presented as a dynamic case study.
Deterministic equivalents for certain functionals of large random matrices
Creators: name: Hachem, Walid
name: Loubaton, Philippe
name: Najim, Jamal
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 15A52 (Primary) 15A18, 60F15 (Secondary)

description: Consider an $N\times n$ random matrix $Y_n=(Y^n_{ij})$ where the entries are given by $Y^n_{ij}=\frac{σ_{ij}(n)}{\sqrt{n}}X^n_{ij}$, the $X^n_{ij}$ being independent and identically distributed, centered with unit variance and satisfying some mild moment assumption. Consider now a deterministic $N\times n$ matrix A_n whose columns and rows are uniformly bounded in the Euclidean norm. Let $Σ_n=Y_n+A_n$. We prove in this article that there exists a deterministic $N\times N$ matrix-valued function T_n(z) analytic in $\mathbb{C}-\mathbb{R}^+$ such that, almost surely, \[\lim_{n\to+\infty,N/n\to c}\biggl(\frac{1}{N}\operatorname {Trace}(Σ_nΣ_n^T-zI_N)^{-1}-\frac{1}{N}\operatorname {Trace}T_n(z)\biggr)=0.\] Otherwise stated, there exists a deterministic equivalent to the empirical Stieltjes transform of the distribution of the eigenvalues of $Σ_nΣ_n^T$. For each n, the entries of matrix T_n(z) are defined as the unique solutions of a certain system of nonlinear functional equations. It is also proved that $\frac{1}{N}\operatorname {Trace} T_n(z)$ is the Stieltjes transform of a probability measure $π_n(dλ)$, and that for every bounded continuous function f, the following convergence holds almost surely \[\frac{1}{N}\sum_{k=1}^Nf(λ_k)-\int_0^{\infty}f(λ)π_n(dλ)\mathop {\longrightarrow}_{n\to\infty}0,\] where the $(λ_k)_{1\le k\le N}$ are the eigenvalues of $Σ_nΣ_n^T$. This work is motivated by the context of performance evaluation of multiple inputs/multiple output (MIMO) wireless digital communication channels. As an application, we derive a deterministic equivalent to the mutual information: \[C_n(σ^2)=\frac{1}{N}\mathbb{E}\log \det\biggl(I_N+\frac{Σ_nΣ_n^T}{σ^2}\biggr),\] where $σ^2$ is a known parameter.
description: Published at http://dx.doi.org/10.1214/105051606000000925 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Power-saving Asynchronous Quorum-based Protocols for Maximal Neighbour Discovery
Creators: name: Imani, Mehdi
name: Ali, Maaruf
name: Arabnia, Hamid Reza
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The discovery of neighbouring active nodes is one of the most challenging problems in asynchronous ad hoc networks. Since time synchronization is extremely costly in these networks, application of asynchronous methods like quorum-based protocols have attracted increased interest for their suitability. This is because Quorum-based protocols can guarantee that two nodes with differing clock times have an intersection within at least one timeslot. A higher neighbour discovery rate of active nodes is desired, but it also results in a higher active ratio and consequently and adversely more overall power consumption of the nodes and a shorter network lifetime. There must be a trade-off between extensive neighbour discovery and active ratio in order to design high-performance and efficient protocols. In this paper, two novel asynchronous quorum-based protocols to maximize the neighbour discovery and minimize the active ratio have been designed and presented. A new metric (Quorum Efficiency Ratio: QER) has also been designed to evaluate and compare the performance of quorum-based protocols in terms of their neighbour discovery (the Expected Quorum Overlap Size: EQOS) and the active ratio. The EQOS has been theoretically derived, along with the Active Ratio and the QER values for the proposed novel protocols and the other contemporary protocols. Finally, the proposed methods have been evaluated and compared against the other methods based on the current metrics and the new metric.
Holböck, Ferdinand/Sartory, Thomas, Mysterium Kirche in der Sicht der theologischen Disziplinen
Creators: name: Weissgerber, Hans
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 12 Nr. 3 (1963): Ökumenische Rundschau, Band 12, Heft 3
Local Stackelberg equilibrium seeking in generalized aggregative games
Creators: name: Fabiani, Filippo
name: Tajeddini, Mohammad Amin
name: Kebriaei, Hamed
name: Grammatico, Sergio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Computer Science and Game Theory (cs.GT)
subject: Multiagent Systems (cs.MA)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a two-layer, semi-decentralized algorithm to compute a local solution to the Stackelberg equilibrium problem in aggregative games with coupling constraints. Specifically, we focus on a single-leader, multiple-follower problem, and after equivalently recasting the Stackelberg game as a mathematical program with complementarity constraints (MPCC), we iteratively convexify a regularized version of the MPCC as inner problem, whose solution generates a sequence of feasible descent directions for the original MPCC. Thus, by pursuing a descent direction at every outer iteration, we establish convergence to a local Stackelberg equilibrium. Finally, the proposed algorithm is tested on a numerical case study involving a hierarchical instance of the charging coordination of Plug-in Electric Vehicles (PEVs).
Interacting classical dimers on the square lattice
Creators: name: Alet, Fabien
name: Jacobsen, Jesper Lykke
name: Misguich, Gregoire
name: Pasquier, Vincent
name: Mila, Frederic
name: Troyer, Matthias
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a model of close-packed dimers on the square lattice with a nearest neighbor interaction between parallel dimers. This model corresponds to the classical limit of quantum dimer models [D.S. Rokhsar and S.A. Kivelson, Phys. Rev. Lett.{\bf 61}, 2376 (1988)]. By means of Monte Carlo and Transfer Matrix calculations, we show that this system undergoes a Kosterlitz-Thouless transition separating a low temperature ordered phase where dimers are aligned in columns from a high temperature critical phase with continuously varying exponents. This is understood by constructing the corresponding Coulomb gas, whose coupling constant is computed numerically. We also discuss doped models and implications on the finite-temperature phase diagram of quantum dimer models.
description: 4 pages, 4 figures; v2 : Added results on doped models; published version
Long distance adiabatic wireless energy transfer via multiple coils coupling
Creators: name: Huang, Wei
name: Qu, Xiaowei
name: Yin, Shan
name: Zubair, Muhammad
name: Guo, Chu
name: Xiong, Xianming
name: Zhang, Wentao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, the wireless energy transfer model can be described as the Schrodinger equation [Annals of Physics, 2011, 326(3): 626-633; Annals of Physics, 2012, 327(9): 2245-2250]. Therefore, wireless energy transfer can be designed by coherent quantum control techniques, which can achieve efficient and robust energy transfer from transmitter to receiver device. In this paper, we propose a novel design of wireless energy transfer which obtains the longer distance, efficient and robust schematic of power transfer, via multiple states triangle crossing pattern. After our calculations, we demonstrate that our design can provide much longer transfer distance with relatively smaller decreasing in the transfer efficiency.
description: 5 pages, 4 figures
OPERATIONAL ACCOUNTING FOR FARM MANAGEMENT
Creators: name: Mauldon, Roger G.
name: Schapper, Henry P.
name: Treloar, D.W.G.
name: Mauldon, Roger G.
name: Schapper, Henry P.
name: Treloar, D.W.G.
Publisher: name: Unknown
Year: 1969
Subjects: Agricultural Finance

description: The accounting system of the Farm Management Service Laboratory of Western Australia is discussed. As a point of reference it uses the system approved by the National Workshop on Standardization of Terminology and Procedures in Farm Management Accounting in Australia. The Laboratory's system is expressly designed to provide a continuous flow of information to the farmer for his control, understanding and evaluation, planning and budgeting, and enhancing credit-worthiness.
Ground state of a large number of particles on a frozen topography
Creators: name: Travesset, Alex
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Problems consisting in finding the ground state of particles interacting with a given potential constrained to move on a particular geometry are surprisingly difficult. Explicit solutions have been found for small numbers of particles by the use of numerical methods in some particular cases such as particles on a sphere and to a much lesser extent on a torus. In this paper we propose a general solution to the problem in the opposite limit of a very large number of particles M by expressing the energy as an expansion in M whose coefficients can be minimized by a geometrical ansatz. The solution is remarkably universal with respect to the geometry and the interaction potential. Explicit solutions for the sphere and the torus are provided. The paper concludes with several predictions that could be verified by further theoretical or numerical work.
description: 9 pages, 9 figures, LaTeX file
Beyreuther, Erich, Zinzendorf und die Christenheit
Creators: name: Reichel, Hellmut
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 12 Nr. 3 (1963): Ökumenische Rundschau, Band 12, Heft 3
Discovery of nine quasars behind the Large Magellanic Cloud
Creators: name: Dobrzycki, A.
name: Eyer, L.
name: Stanek, K. Z.
name: Macri, L. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the discovery of nine quasars behind the Large Magellanic Cloud, with emission redshifts ranging from 0.07 to 2.0. Six of them were identified as part of the systematic variability-based search for QSOs in the objects from the OGLE-II database. Combination of variability-based selection of candidates with the candidates' colours appears to be a powerful technique for identifying quasars, potentially reaching ca. 50% efficiency. We report an apparent correlation between variability magnitude and variability timescale, which - if confirmed - could put even more constraints on QSO candidate selection. The remaining three quasars were identified via followup spectroscopy of optical counterparts to X-ray sources found serendipitously by the Chandra X-ray Observatory satellite. Even though the locations of the candidates were quite uniformly distributed over the LMC bar, the confirmed QSOs all appear near the bar's outskirts.
description: 7 pages, 6 figures, submitted to Astronomy and Astrophysics
PRODUCTION SCHEDULING AND ALLOCATION: A NORMATIVE DECISION MODEL FOR SUGAR MILLING
Creators: name: Guise, John W.B.
name: Ryland, G.J.
name: Guise, John W.B.
name: Ryland, G.J.
Publisher: name: Unknown
Year: 1969
Subjects: Production Economics

description: An inter-temporal equilibrium model is developed for the purpose of optimizing the scheduling of production in Australian sugar mills. An application of this quadratic programming model is then discussed, and the procedures used to estimate coefficients are outlined. Two tentative conclusions are that mills tend to commence crushing before the optimal starting date and that in many cases they would have been unable to cover their marginal processing costs when producing No.2 Pool sugar in recent seasons.
Integrating Personalized Parsons Problems with Multi-Level Textual Explanations to Scaffold Code Writing
Creators: name: Hou, Xinying
name: Ericson, Barbara J.
name: Wang, Xu
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Novice programmers need to write basic code as part of the learning process, but they often face difficulties. To assist struggling students, we recently implemented personalized Parsons problems, which are code puzzles where students arrange blocks of code to solve them, as pop-up scaffolding. Students found them to be more engaging and preferred them for learning, instead of simply receiving the correct answer, such as the response they might get from generative AI tools like ChatGPT. However, a drawback of using Parsons problems as scaffolding is that students may be able to put the code blocks in the correct order without fully understanding the rationale of the correct solution. As a result, the learning benefits of scaffolding are compromised. Can we improve the understanding of personalized Parsons scaffolding by providing textual code explanations? In this poster, we propose a design that incorporates multiple levels of textual explanations for the Parsons problems. This design will be used for future technical evaluations and classroom experiments. These experiments will explore the effectiveness of adding textual explanations to Parsons problems to improve instructional benefits.
description: Peer-Reviewed, Accepted for publication in Proceedings of the 55th ACM Technical Symposium on Computer Science Education V. 2 (SIGCSE 2024)
EXTRA TAX RESULTING FROM INCOME VARIATION WITH PARTICULAR REFERENCE TO NEW ZEALAND
Creators: name: McArthur, A.T.G.
name: McArthur, A.T.G.
Publisher: name: Unknown
Year: 1969
Subjects: Public Economics

description: The extent by which expected tax payments are increased by income variance is discussed in the New Zealand setting. The cases of both normal and rectangular distributions of income are examined. The absolute magnitude of the expected extra tax for income fluctuation is lower than was expected. In Australia income variance may be higher but the more rapidly progressive tax rates of New Zealand mean that for a given mean income and standard deviation the extra tax in that country would be higher.
The Antidumping Negotiations: Proposals, Positions and Antidumping Profiles
Creators: name: Young, Linda M.
name: Wainio, John
name: Young, Linda M.
name: Wainio, John
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: antidumping
subject: FTAA negotiations
subject: WTO negotiations

description: Negotiations over the rules governing the use of antidumping (AD) duties are occurring in both the World Trade Organization and the Free Trade Area of the Americas. Unfortunately, the goal of the negotiations is unclear, as some governments want to restrict the use of antidumping while others seek to maintain the ability of national governments to use antidumping measures. We hypothesize that members who desire to preserve the use of antidumping are active in initiating suits. To explore this hypothesis, we examine the positions taken by major actors in the negotiations, and their antidumping profiles. An antidumping profile includes data on a member's AD actions, including investigations and measures the member initiates, as well as investigations and measures against the member's exports.
Local and global mermaids : the politics of "pretty swimming"
Creators: name: Thomas, Laura Michelle
Publisher: name: University of British Columbia
Year: 2009

description: This thesis considers the perceived athleticism of synchronized swimming by looking at the implications of representations of Esther Williams and "pretty swimming" in popular culture, the allocation of space for women's sport in a local public swimming pool, and an inaugural championship event. Focusing on the first British Columbia (BC) synchronized swimming championships, which were held on February 5, 1949 at Crystal Pool in Vancouver, it shows that images of synchronized swimming as "entertainment" facilitated the development of a new arena of competition for BC women, but that this was accompanied, in effect, by a trivialization of the accomplishments of organizers and athletes. Chapter One examines the construction of a "global" mermaid by analysing Esther Williams' first film, Bathing Beauty (1944), as a typical example of the Metro-Goldwyn- Mayer (MGM) aquamusical, a genre that produced images of synchronized swimming as frivolous entertainment. Chapter Two considers how these sorts of images affected the allocation of physical space at Crystal Pool, Vancouver's only indoor public swimming pool at the time, for women's sport. Chapter Three introduces two women who were involved in the 1949 BC synchronized swimming championships: May Brown, who at the time was a University of British Columbia (UBC) Physical Education instructor and synchronized swimming judge, and Maureen Bray (Hibberson), a UBC student who won the individual championship event. Their recollections provide an important corrective to the "pretty swimming" stereotype by demonstrating that these women used the cultural and physical space allotted to them to create a new sport for local women. The final chapter also includes episodes from my personal experiences as a synchronized swimmer in BC during the 1980s to underscore the complicated and conflicted heritage for synchronized swimmers in BC represented by the legacy of the 1949 championships and the MGM aquamusical.
Trade Effects of the East African Community
Creators: name: Busse, Matthias
name: Shams, Rasul
name: Busse, Matthias
name: Shams, Rasul
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: Customs Union
subject: EAC
subject: Kenya
subject: Tanzania
subject: Uganda

description: This article evaluates the trade effects of the new East African Community, which fosters trade liberalisation among Kenya, Tanzania and Uganda. The analysis uses a disaggregated approach at the two-digit level of the Standard International Trade Classification. The commodities that will be particularly affected by the customs union are identified. The results show that considerable trade effects cannot be expected, except for a very narrow range of products. The transitional fund, which has been proposed to counter trade imbalances due to the new customs union in East Africa, becomes less urgent from this perspective.
NAFTA and the Mobility of Highly Skilled Workers: The Case of Canadian Nurses
Creators: name: Blouin, Chantal
name: Blouin, Chantal
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: Labor and Human Capital
subject: labour mobility
subject: NAFTA
subject: nurses

description: This article examines the impact of trade treaties on health professionals' international mobility. It presents a case study of the impact of labour mobility clauses in trade agreements on the Canadian nursing labour market. It provides statistical evidence on the impact of NAFTA's Chapter 16 on the cross-border movement of Canadian nurses in the 1990s. We observed that an increasingly large number of Canadian nurses went to work in the United States using the NAFTA facilitation mechanism but that this growth could not be attributed to the trade agreement alone; domestic labour market conditions are key to understanding this cross-border movement. The article concludes that trade treaties and international migration of health personnel do not offer simple solutions to health personnel shortages, but can pose a danger to precarious health systems in developing countries.
A note on the CR cohomology of Levi-Flat minimal orbits in complex flag manifolds
Creators: name: Altomani, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32L10; Secondary: 14M15, 32V30, 32L10 (Primary) 14M15, 32V30, 57T15 (Secondary)

description: We prove a relation between the $\bar\partial_M$ cohomology of a minimal orbit $M$ of a real form $G_0$ of a complex semisimple Lie group $G$ in a flag manifold $G/Q$ and the Dolbeault cohomology of the Matsuki dual open orbit $X$ of the complexification $K$ of a maximal compact subgroup $K_0$ of $G_0$, under the assumption that $M$ is Levi-flat.
description: 7 pages, AMS-LaTeX to appear in Rend. Ist. Mat. Univ. Trieste v2: added reference in introduction + minor revision
Quantum Tomographic Cryptography with a Semiconductor Single Photon Source
Creators: name: Kaszlikowski, Dagomir
name: Kwek, L. C.
name: Yang, Lim Jenn
name: Willeboordse, Frederick H.
name: Yong, Looi Shiang
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we analyze the security of the so-called quantum tomographic cryptography with the source producing entangled photons via an experimental scheme proposed in Phys. Rev. Lett. 92, 37903 (2004). We determine the range of the experimental parameters for which the protocol is secure against the most general incoherent attacks.
The Effects of Biotechnology Policy on Trade and Growth
Creators: name: Oehmke, James F.
name: Maredia, Mywish K.
name: Weatherspoon, Dave D.
name: Oehmke, James F.
name: Maredia, Mywish K.
name: Weatherspoon, Dave D.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: biotechnology
subject: economic growth
subject: international trade
subject: regulation
subject: research and development

description: Despite the clear influence of European Union biotechnology restrictions on trade patterns, very little work has been done to model these influences or their long-run effects. This paper presents an economic trade theory model of biotechnology, biotechnology research and development (R&D), and biotechnology regulation. The model analyzes the impact of European Union consumer preferences on production and consumption of biotechnology products, the level and national origin of biotechnology R&D, trade patterns, and growth. The results indicate that developing countries may become the major producers of biotechnology agricultural products if they can establish the necessary legal infrastructure; and that European biotechnology regulations effectively act as a capital subsidy to developing countries.
NLO BFKL tests using the proton structure function $F_2$ measured at HERA
Creators: name: Royon, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a phenomenological study of the next-to-leading Balitsky-Fadin-Kuraev-Lipatov (BFKL) approach applied to the data on the proton structure function $F_2$ measured at HERA in the small-$x_{Bj}$ region.
description: DIS 2005 proceedings, Madison
An Analysis of an Alliance: NAFTA Trucking and the US Insurance Industry
Creators: name: Condon, Bradly
name: Sinha, Tapen
name: Condon, Bradly
name: Sinha, Tapen
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: NAFTA
subject: insurance
subject: trucking
subject: WTO

description: In the NAFTA, the United States agreed to phase out restrictions on the operation of Mexican trucking companies in the United States. When the deadlines came, the Clinton Administration chose to maintain the restrictions. Following a NAFTA panel ruling against the United States, the Bush Administration announced it would remove the restrictions. The decision has met with opposition from both truckers and insurers in the United States, who cite safety concerns. This article examines the economic, political and legal forces at work in this debate, as well as the relationship between the NAFTA and WTO rules on trade in services that apply.
Whitham equations and phase shifts for the Korteweg-deVries equation
Creators: name: Ablowitz, Mark J.
name: Cole, Justin T.
name: Rumanov, Igor
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 35Q53, 35Q51, 35C07, 76B15, 76B25

description: The semi-classical Korteweg-deVries equation for step-like data is considered with a small parameter in front of the highest derivative. Using perturbation analysis Whitham theory is constructed to higher order. This allows the order one phase and the complete leading order solution to be obtained; the results are confirmed by extensive numerical calculations.
description: 25 pages, 5 figures, a shorter version is accepted for publication in Proc. Roy. Soc. A
Guided Time-optimal Model Predictive Control of a Multi-rotor
Creators: name: Zhang, Guangyu
name: Zheng, Yongjie
name: He, Yuqing
name: Yang, Liying
name: Nie, Hongyu
name: Huang, Chaoxiong
name: Zhao, Yiwen
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Time-optimal control of a multi-rotor remains an open problem due to the under-actuation and nonlinearity of its dynamics, which make it difficult to solve this problem directly. In this paper, the time-optimal control problem of the multi-rotor is studied. Firstly, a thrust limit optimal decomposition method is proposed, which can reasonably decompose the limited thrust into three directions according to the current state and the target state. As a result, the thrust limit constraint is decomposed as a linear constraint. With the linear constraint and decoupled dynamics, a time-optimal guidance trajectory can be obtained. Then, a cost function is defined based on the time-optimal guidance trajectory, which has a quadratic form and can be used to evaluate the time-optimal performance of the system outputs. Finally, based on the cost function, the time-optimal control problem is reformulated as an MPC (Model Predictive Control) problem. The experimental results demonstrate the feasibility and validity of the proposed methods.
description: 6 pages, 5 figures
A Variational Monte Carlo Study of the Current Carried by a Quasiparticle
Creators: name: Nave, Cody P
name: Ivanov, Dmitri A.
name: Lee, Patrick 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: With the use of Gutzwiller-projected variational states, we study the renormalization of the current carried by the quasiparticles in high-temperature superconductors and of the quasiparticle spectral weight. The renormalization coefficients are computed by the variational Monte Carlo technique, under the assumption that quasiparticle excitations may be described by Gutzwiller-projected BCS quasiparticles. We find that the current renormalization coefficient decreases with decreasing doping and tends to zero at zero doping. The quasiparticle spectral weight Z_+ for adding an electron shows an interesting structure in k space, which corresponds to a depression of the occupation number k just outside the Fermi surface. The perturbative corrections to those quantities in the Hubbard model are also discussed.
description: 9 pages, 9 figures