cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Manipulative resonant nonlinear optics: nonlinear interference effects and quantum control of nonlinearity, dispersion, transparency and inversionless amplification in an extended strongly-absorbing inhomogeneously-broadened medium
Creators: name: Popov, A. K.
name: Myslivets, S. A.
name: George, Thomas F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Specific features of nonlinear interference processes at quantum transitions in near- and fully-resonant optically-dense Doppler-broadened medium are studied. The feasibility of overcoming of the fundamental limitation on a velocity-interval of resonantly coupled molecules imposed by the Doppler effect is shown based on quantum coherence. This increases the efficiency of nonlinear-optical processes in atomic and molecular gases that possess the most narrow and strongest resonances. The possibility of all-optical switching of the medium to opaque or, alternatively, to absolutely transparent, or even to strongly-amplifying states is explored, which is controlled by a small variation of two driving radiations. The required intensities of the control fields are shown to be typical for cw lasers. These effects are associated with four-wave mixing accompanied by Stokes gain and by their interference in fully- and near-resonant optically-dense far-from-degenerate double-Lambda medium. Optimum conditions for inversionless amplification of short-wavelength radiation above the oscillation threshold at the expense of the longer-wavelength control fields, as well as for Raman gain of the generated idle infrared radiation, are investigated. The outcomes are illustrated with numerical simulations applied to sodium dimer vapor. Similar schemes can be realized in doped solids and in fiber optics.
description: 15 pages, 12 figures, 46 references
Extracting the Subhalo Mass Function from Strong Lens Images with Image Segmentation
Creators: name: Ostdiek, Bryan
name: Rivero, Ana Diaz
name: Dvorkin, Cora
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Detecting substructure within strongly lensed images is a promising route to shed light on the nature of dark matter. However, it is a challenging task, which traditionally requires detailed lens modeling and source reconstruction, taking weeks to analyze each system. We use machine-learning to circumvent the need for lens and source modeling and develop a neural network to both locate subhalos in an image as well as determine their mass using the technique of image segmentation. The network is trained on images with a single subhalo located near the Einstein ring across a wide range of apparent source magnitudes. The network is then able to resolve subhalos with masses $m\gtrsim 10^{8.5} M_{\odot}$. Training in this way allows the network to learn the gravitational lensing of light, and remarkably, it is then able to detect entire populations of substructure, even for locations further away from the Einstein ring than those used in training. Over a wide range of the apparent source magnitude, the false-positive rate is around three false subhalos per 100 images, coming mostly from the lightest detectable subhalo for that signal-to-noise ratio. With good accuracy and a low false-positive rate, counting the number of pixels assigned to each subhalo class over multiple images allows for a measurement of the subhalo mass function (SMF). When measured over three mass bins from $10^9M_{\odot}$--$10^{10} M_{\odot}$ the SMF slope is recovered with an error of 36% for 50 images, and this improves to 10% for 1000 images with Hubble Space Telescope-like noise.
description: v1:23 + 5 pages, 12 + 2 figures. v2: matches accepted version in ApJ. v3: matches version published in ApJ
Spin-nematic order in the frustrated pyrochlore-lattice quantum rotor model
Creators: name: Gregor, Karol
name: Huse, David A.
name: Sondhi, S. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: As an example of ordering due to quantum fluctuations, we examine the nearest-neighbor antiferromagnetic quantum O(n) rotor model on the pyrochlore lattice. Classically, this system remains disordered even at zero temperature; we find that adding quantum fluctuations induces an ordered phase that survives to positive temperature, and we determine how its phase diagram scales with the coupling constant and the number of spin components. We demonstrate, using quantum Monte Carlo simulations, that this phase has long-range spin-nematic order, and that the phase transition into it appears to be first order.
description: 10 pages, 8 figures
Crop insurance in transition: A qualitative and quantitative assessment of insurance products (Preliminary results)
Creators: name: Bokusheva, Raushan
name: Bokusheva, Raushan
Publisher: name: Unknown
Year: 2004
Subjects: Risk and Uncertainty

description: This discussion paper considers insurance as a possible instrument of farm income stabilization and compares several crop insurance products with respect to their applicability in a transition economy using the case of Kazakhstan. The analysis is based on a qualitative evaluation as well a quantitative assessment of selected insurance products. The qualitative analysis reviews the available literature on the topic. The quantitative assessment completes the comparison introducing the findings of a numerical analysis of farm and weather data.
Light Higgsinos for electroweak naturalness in mirage-mediated high-scale supersymmetry
Creators: name: Jeong, Kwang Sik
name: Park, Chan Beom
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Mirage mediation realized in the Kachru-Kallosh-Linde-Trivedi (KKLT) flux compactification can naturally suppress the up-type Higgs soft mass at low energy scales. As a result, compared to the conventional scenarios, the degree of electroweak fine-tuning can be reduced further up to by a loop factor if the Higgsinos are much lighter than the heavy Higgs doublet. Interestingly, this feature holds even in high-scale supersymmetry as long as the gauge coupling unification, which is required as a prerequisite for mirage mediation, accommodates such light Higgsinos. Under the experimental constraints on the observed Higgs boson, it turns out that mirage mediation can exhibit low electroweak fine-tuning better than a few percent for stops between about 2 and 6 TeV, i.e., at the same level as in the weak scale supersymmetry, if the Higgsinos are around or below a few hundred GeV.
description: 1+18 pages, 3 figures, 1 table, 1 appendix; discussion extended, references added, matches published version
ANALYSE DER WETTBEWERBSPROZESSE IN DER POLNISCHEN FLEISCHINDUSTRIE SEIT TRANSFORMATIONSBEGINN
Creators: name: Pieniadz, Agata
name: Rudolph, Dirk W.
name: Wandel, Jurgen
name: Pieniadz, Agata
name: Rudolph, Dirk W.
name: Wandel, Jurgen
Publisher: name: Unknown
Year: 1998
Subjects: Industrial Organization
Livestock Production/Industries

description: It is the objective of the present study to examine the competitive processes within the Polish meat processing industry during the first six years of transformation empirically. In particular, two questions were posed: How did the intensity of competition develop in this sector since the beginning of the transformation process? What are the factors that did further or impede individual firm growth? The intensity of static competition in input procurement did increase slightly during the transformation process, but the intensity of dynamic competition in selling output, which is still high, did decrease. The results of an econometric analysis of market share development showed that below average initial firm size and above average input procurement prices exercised a significantly negative effect on firm size growth, whereas a growing resource base in the firm's vicinity showed a significantly positive effect. Factors that were not found to have any significant effect on the market share growth of the firm include: above average initial firm size, below average input procurement prices, declining resource base in the firm's vicinity, and below or above average population density in the firm's vicinity.
Analytic charged BHs in $f(\mathcal{R})$ gravity
Creators: name: Nashed, G. G. L.
name: Nojiri, Shin'ichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, we seek exact charged spherically symmetric black holes (BHs) with considering $f(\mathcal{R})$ gravitational theory. These BHs are characterized by convolution and error functions. Those two functions depend on a constant of integration which is responsible to make such a solution deviate from the Einstein general relativity (GR). The error function which constitutes the charge potential of the Maxwell field depends on the constant of integration and when this constant is vanishing we can not reproduce the Reissner-Nordström BH in the lower order of $f(\mathcal{R})$. This means that we can not reproduce Reissner-Nordström BH in lower-order-curvature theory, i.e., in GR limit $f(\mathcal{R})=\mathcal{R}$, we can not get the well known charged BH. We study the physical properties of these BHs and show that it is asymptotically approached as a flat spacetime or approach AdS/dS spacetime. Also, we calculate the invariants of the BHS and show that the singularities are milder than those of BH's of GR. Additionally, we derive the stability condition through the use of geodesic deviation. Moreover, we study the thermodynamics of our BH and investigate the impact of the higher-order-curvature theory. Finally, we show that all the BHs are stable and have radial speed equal to one through the use of odd-type mode.
description: Version to appear in PLB
AUSWIRKUNGEN EINER EU-OSTERWEITERUNG IM BEREICH DER AGRARPOLITIK AUF DEN EU-HAUSHALT
Creators: name: Weber, Gerald
name: Wahl, Olaf
name: Meinlschmidt, Ewa
name: Weber, Gerald
name: Wahl, Olaf
name: Meinlschmidt, Ewa
Publisher: name: Unknown
Year: 2000
Subjects: subject: Agricultural and Food Policy
subject: EU East Enlargement
subject: EU Budget
subject: Sector Modelling
subject: Agricultural Sector
subject: Partial Equilibrium Model
subject: Policy Analyses

description: This discussion paper presents the results of a study on the impacts of EU East enlargement on the EU agricultural budget. The calculations have been carried out with the partial equilibrium model 'Central and Eastern European Countries Agricultural Simulation Model (CEECASIM) that has been developed at IAMO. An accession scenario has been assumed in which the Common Agricultural Policy as reformed by the European Council of Berlin in March 1999 is applied in ten Central and Eastern European countries. Besides the price support measures also the area payments and the animal premiums as well as the production quotas for milk and sugar are implemented in the candidate countries. According to the model results the annual expenditures for the ten Central and Eastern European candidate countries in the areas of cereals, oilseeds, sugar, milk and beef amount to Euro 7.5 billion at prices of 1999 to be financed by the EU budget. This corresponds to 20 % of the total agricultural expenditure (without rural development) as foreseen in the financial perspectives of the European Commission. The greatest share of these expenditures arises from the area payments for cereals and oilseeds and from the premiums in the beef and milk sector.
Beyond Cats and Dogs: Semi-supervised Classification of fuzzy labels with overclustering
Creators: name: Schmarje, Lars
name: Brünger, Johannes
name: Santarossa, Monty
name: Schröder, Simon-Martin
name: Kiko, Rainer
name: Koch, Reinhard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: A long-standing issue with deep learning is the need for large and consistently labeled datasets. Although the current research in semi-supervised learning can decrease the required amount of annotated data by a factor of 10 or even more, this line of research still uses distinct classes like cats and dogs. However, in the real-world we often encounter problems where different experts have different opinions, thus producing fuzzy labels. We propose a novel framework for handling semi-supervised classifications of such fuzzy labels. Our framework is based on the idea of overclustering to detect substructures in these fuzzy labels. We propose a novel loss to improve the overclustering capability of our framework and show on the common image classification dataset STL-10 that it is faster and has better overclustering performance than previous work. On a real-world plankton dataset, we illustrate the benefit of overclustering for fuzzy labels and show that we beat previous state-of-the-art semisupervised methods. Moreover, we acquire 5 to 10% more consistent predictions of substructures.
description: Reworked version available at arXiv:2110.06630, Published in Sensors 2021 (see DOI link)
FARM INVESTMENT, CREDIT RATIONING, AND PUBLIC CREDIT POLICY IN POLAND: A MICROECONOMETRIC ANALYSIS
Creators: name: Petrick, Martin
name: Petrick, Martin
Publisher: name: Unknown
Year: 2002
Subjects: subject: Agricultural Finance
subject: farm investment
subject: credit policy
subject: Poland
subject: microeconometrics

description: The aim of this paper is to empirically analyse the effects of governmentally promoted credit access on the investment behaviour of credit rationed farmers. This is done by specifying an empirical investment equation which is estimated on a cross-sectional sample of Polish farm household data. In contrast to conventional neo-classical investment models, the investment equation contains the financial variable long-term credit access, which plays the central role in this study. The econometric analysis is used to analyse the determinants of credit access and estimate the marginal effect of credit on investment, which in turn provides the key information for policy evaluation. The results suggest that access to subsidised credit has a significant role in determining investment behaviour of farmers who self-classified as being exogenously credit constrained. This classification applies to 45 percent of all respondents. Major determinants of credit rationing are the reputation of the borrower and the demographic household composition. In various specifications of the credit investment relationship, including a cubic Tobit model, the average marginal effect of credit on investment was smaller than one. This implies that credit is partly used for other purposes than productive investment. Every second borrower invests less in productive assets than borrowed. However, over a commonly observed range, the marginal effect increases with an increasing credit volume. Even so, the investment volume is negatively related to farm size. A government policy aiming at the promotion of productive investment should hence emphasise lending in larger amounts without discriminating small farms.
Color dipoles from Bremsstrahlung in QCD evolution at high energy
Creators: name: Hatta, Y.
name: Iancu, E.
name: McLerran, L.
name: Stasto, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the recently developed Hamiltonian theory for high energy evolution in QCD in the dilute regime and in the presence of Bremsstrahlung is consistent with the color dipole picture in the limit where the number of colors N_c is large. The color dipoles are quark-antiquark pairs which can radiate arbitrarily many soft gluons, and the evolution consists in the splitting of any such a dipole into two. We construct the color glass weight function of an onium as a superposition of color dipoles, each represented by a pair of Wilson lines. We show that the action of the Bremsstrahlung Hamiltonian on this weight function and in the large-N_c limit generates the evolution expected from the dipole picture. We construct the dipole number operator in the Hamiltonian theory and deduce the evolution equations for the dipole densities, which are again consistent with the dipole picture. We argue that the Bremsstrahlung effects beyond two gluon emission per dipole are irrelevant for the calculation of scattering amplitudes at high energy.
description: 30 pages
New Results on N=4 SuperYang-Mills Theory
Creators: name: Baulieu, Laurent
name: Bossard, Guillaume
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The N=4 SuperYang--Mills theory is covariantly determined by a U(1) \times SU(2) \subset SL(2,R) \times SU(2) internal symmetry and two scalar and one vector BRST topological symmetry operators. This determines an off-shell closed sector of N=4 SuperYang-Mills, with 6 generators, which is big enough to fully determine the theory, in a Lorentz covariant way. This reduced algebra derives from horizontality conditions in four dimensions. The horizontality conditions only depend on the geometry of the Yang-Mills fields. They also descend from a genuine horizontality condition in eight dimensions. In fact, the SL(2,R) symmetry is induced by a dimensional reduction from eight to seven dimensions, which establishes a ghost-antighost symmetry, while the SU(2) symmetry occurs by dimensional reduction from seven to four dimensions. When the four dimensional manifold is hyperKahler, one can perform a twist operation that defines the N=4 supersymmetry and its SL(2,H)\sim SU(4) R-symmetry in flat space. (For defining a TQFT on a more general four manifold, one can use the internal SU(2)-symmetry and redefine a Lorentz SO(4) invariance). These results extend in a covariant way the light cone property that the N=4 SuperYang-Mills theory is actually determined by only 8 independent generators, instead of the 16 generators that occur in the physical representation of the superPoincare algebra. The topological construction disentangles the off-shell closed sector of the (twisted) maximally supersymmetric theory from the (irrelevant) sector that closes only modulo equations of motion. It allows one to escape the question of auxiliary fields in N=4 SuperYang-Mills theory.
description: 14 pages
DER SLOWAKISCHE MARKT FUR MILCH UND MILCHPRODUKTE -- VOM BEGINN DER TRANSFORMATION BIS ZUM EU-BEITRITT
Creators: name: Glitsch, Kristina
name: Eerits, Alena
name: Glitsch, Kristina
name: Eerits, Alena
Publisher: name: Unknown
Year: 2004
Subjects: subject: Livestock Production/Industries
subject: Slovakia
subject: dairy industry
subject: milk consumption
subject: milk production
subject: milk processing
subject: structural change

description: Like in other CEEC, transition in the beginning of the 1990s had significant consequences for the agricultural and food sectors in Slovakia. For example, Slovakian consumers reacted to the abolition of consumer subsidies by drastically reducing their consumption of milk and milk products. Concurrently, milk production declined and now stands at fifty percent of its 1989 level. Dairies were closed down while those remaining carried on producing under constantly increasing overcapacities. In the years prior to EU accession, activities in the milk sector were primarily aimed at the adoption of EU standards. Meanwhile, the Slovakian milk processing industry is predominantly in the possession of foreign investors. Present per capita consumption of milk and milk production is still at a very low level, which nutrition experts assess as an alarming health risk. This paper contains an overview of the Slovakian dairy sector, which comprises the complete milk chain from primary production to processing and retailing up to consumption. The description is complemented by background information on demographic, economic and political parameters in Slovakia. ZUSAMMENFASSUNG Ähnlich wie in den anderen MOEL hatte auch in der Slowakei der Systemwechsel Anfang der 90er Jahre drastische Folgen für den Agrar- und Ernährungssektor. Die Konsumenten reagierten auf die Abschaffung der Verbrauchersubventionen bei Milch und Milchprodukten mit deutlicher Einschränkung ihrer Nachfrage. Gleichzeitig schrumpfte die Milchproduktion seit Transformationsbeginn auf gegenwärtig etwa die Hälfte des Niveaus von 1989. Molkereien wurden geschlossen bzw. mit stetig wachsenden Überkapazitäten betrieben. In den letzten Jahren vor dem EU-Beitritt waren die Aktivitäten in diesem Sektor in erster Linie auf die Anpassung an EU-Standards gerichtet. Mittlerweile ist die slowakische Milchverarbeitung überwiegend in ausländischer Hand. Der Pro-Kopf-Konsum von Milch und Milchprodukten hat sich auf einem sehr niedrigen, von Ernährungsexperten als gesundheitlich bedenklich beurteilten, Niveau eingependelt. Dieser Diskussionsbeitrag hat eine Zusammenschau von Informationen über den slowakischen Milchsektor zum Inhalt, die die ganze Kette von der Primärproduktion über Verarbeitung und Handel bis hin zum Verbrauch umfasst. Eingebettet sind diese Ausführungen in eine Darstellung der demographischen, wirtschaftlichen und marktpolitischen Rahmenbedingungen der Slowakei.
Dark Matter and Nature of Electroweak Phase Transition with an Inert Doublet
Creators: name: Fabian, Sven
name: Goertz, Florian
name: Jiang, Yun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We provide a comprehensive and up-to-date analysis of the prospects to realize Dark Matter (DM) in the Inert Doublet Model, while simultaneously enhancing the Electroweak Phase Transition (EWPhT) such as to allow for electroweak baryogenesis. Instead of focusing on certain aspects or mass hierarchies, we perform extensive, yet fine-grained, parameter space scans, where we analyze the nature of the EWPhT in both the light and the heavy DM regions, confronting it with the amount of DM potentially residing in the lightest inert-doublet state. Thereby, we point out a viable region where a non-trivial two-step EWPhT can appear, without being in conflict with direct-detection bounds, which could leave interesting imprints in gravitational wave signatures. We propose new benchmarks with this feature as well as update benchmarks with a strong first-order transition in the light of new XENON1T limits. Moreover, taking into account these latest bounds as well as relevant collider constraints, we envisage a new region for light DM with a small mass splitting, lifting the usual assumption of exact degeneracy of the new non-DM scalars, such as to avoid collider bounds while providing a fair DM abundance over a rather large DM mass range. This follows from a detailed survey of the impact of co-annihilations on the abundance, dissecting the various channels.
description: 18 pages, 7 figures, 2 tables; v2: Matches version published in JCAP
Beckmann, Joachim: Kirchliches Jahrbuch für die evangelische Kirche in Deutschland 1967
Creators: name: Kg.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 18 Nr. 4 (1969): Ökumenische Rundschau, Band 18, Heft 4
Algebraic Solution of the Supersymmetric Hydrogen Atom
Creators: name: Wipf, A.
name: Kirchberg, A.
name: Länge, J. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The N=2 supersymmetric extension of the Schrödinger-Hamiltonian with 1/r-potential in d dimension is constructed. The system admits a supersymmetrized Laplace-Runge-Lenz vector which extends the rotational SO(d) symmetry to a hidden SO(d+1) symmetry. It is used to determine the discrete eigenvalues with their degeneracies and the corresponding bound state wave functions.
description: 11 pages, 2 figures (pstricks), Proceedings of the 4th International Symposium "Quantum Theory and Symmetries" (QTS-4), 15-21 August 2005, Varna, Bulgaria; needs qts-proc.cls
CONVERGENCE OF FOOD CONSUMPTION PATTERNS BETWEEN EASTERN AND WESTERN EUROPE
Creators: name: Elsner, Karin
name: Hartmann, Monika
name: Elsner, Karin
name: Hartmann, Monika
Publisher: name: Unknown
Year: 1998
Subjects: Food Consumption/Nutrition/Food Safety

description: This paper is a first attempt to analyze whether convergence of food consumption between Eastern and Western Europe since the beginning of transition can be detected. The study refers to the 10 EU-associated Central and Eastern European Countries (CEECs) and the EU-15. If convergence is a fact, changes in EU food consumption could be a useful indicator for future food consumption patterns in the CEECs. With the end of the socialist era, prices and income have become major determinants of food consumption and the total per capita calorie consumption, as well as the calorie share of animal products, have declined in most CEECs. At the same time, many products that could not be purchased in the past have become available, trade has risen significantly, and foreign direct investment in the food industry and in the distribution sector of the CEECs has become increasingly relevant. This has triggered demonstration effects that suggest convergence of food consumption. Empirical studies on convergence focus either on cross-country comparisons of general trends in food consumption, or they seek to explicitly measure the degree of similarity of the consumption structures and convergence in the structure of food consumption. This paper analyzes convergence in the consumption levels, as well as the structure of food consumption. For this purpose, several indicators have been calculated and pooled regression analyses have been run. The results give a first indication that convergence has occurred, although this does not hold for all CEECs or all food commodities.
0_Readme_DocumentInfo.pdf
Creators: name: organisers, ITAKOM
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 330405
subject: Public participation and community engagement
classificationCode: 390407
subject: Inclusive education
classificationCode: 420305
subject: Health and community services
classificationCode: 350502
subject: Employment equity and diversity

description: This document is part of a Figshare collection related to planning the It Takes All Kinds of Minds (ITAKOM) neurodiversity conference, which took place in March 2023. Versions of these documents have been released as examples that may be useful to others.
Dynamic Relationships Among Selected U.S. Commodity-Based, Value Added Markets: Applying Directed Acyclic Graphs to a Time Series Model
Creators: name: Babula, Ronald A.
name: Bessler, David A.
name: Payne, Warren S.
name: Babula, Ronald A.
name: Bessler, David A.
name: Payne, Warren S.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods
subject: Bernanke structural VARs
subject: directed acyclic graphs
subject: quarterly wheat-related markets

description: This paper demonstrates the application of a recently developed methodology, the combination of directed acyclic graphs (DAGs) with Bernanke structural vector autoregression (VAR) models, to model a system of U.S. commodity-related and value-added markets. As an example, the paper applies this methodology to a quarterly system of U.S. markets: the wheat market and a set of downstream milling and bakery markets that use wheat as an input. Analyses of the model's impulse response simulations and forecast error variance decompositions provide updated estimates of market elasticity parameters that drive these markets, and updated policy-relevant information on how these quarterly markets run and dynamically interact. Results suggest that movements in commodity-based markets strongly influence each other, although most of these effects occur in the long run beyond a single crop cycle. The paper illuminates how important U.S. food prices respond to wheat farm market shocks in price and quantity.
Reconstruction of N=1 supersymmetry from topological symmetry
Creators: name: Baulieu, Laurent
name: Bossard, Guillaume
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The scalar and vector topological Yang-Mills symmetries on Calabi-Yau manifolds geometrically define consistent sectors of Yang-Mills D=4,6 N=1 supersymmetry, which fully determine the supersymmetric actions up to twist. For a CY_2 manifold, both N=1,D=4 Wess and Zumino and superYang-Mills theory can be reconstructed in this way. A superpotential can be introduced for the matter sector, as well as the Fayet-Iliopoulos mechanism. For a CY_3 manifold, the N=1, D=6 Yang-Mills theory is also obtained, in a twisted form. Putting these results together with those already known for the D=4,8 N=2 cases, we conclude that all Yang--Mills supersymmetries with 4, 8 and 16 generators are determined from topological symmetry on special manifolds.
description: 13 pages
Posterior propriety and admissibility of hyperpriors in normal hierarchical models
Creators: name: Berger, James O.
name: Strawderman, William
name: Tang, Dejun
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62C15 (Primary) 62F15 (Secondary)

description: Hierarchical modeling is wonderful and here to stay, but hyperparameter priors are often chosen in a casual fashion. Unfortunately, as the number of hyperparameters grows, the effects of casual choices can multiply, leading to considerably inferior performance. As an extreme, but not uncommon, example use of the wrong hyperparameter priors can even lead to impropriety of the posterior. For exchangeable hierarchical multivariate normal models, we first determine when a standard class of hierarchical priors results in proper or improper posteriors. We next determine which elements of this class lead to admissible estimators of the mean under quadratic loss; such considerations provide one useful guideline for choice among hierarchical priors. Finally, computational issues with the resulting posterior distributions are addressed.
description: Published at http://dx.doi.org/10.1214/009053605000000075 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
A general variational principle and some of its applications
Creators: name: Ricceri, Biagio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J27, 49J45

description: In this paper, given a reflexive real Banach space X and two sequentially weakly lower semicontinuous functionals Phi, Psi on X with Psi strongly continuous and coercive, we are mainly interested in the existence of infinitely many local minima of the functional capital Phi + r Psi for each sufficiently real r.
description: 10 pages
Emergence of exceptional points and their spectroscopic signature in Dirac semimetal-dirty Superconductor heterojunction
Creators: name: Jana, Sayan
name: Chowdhury, Debashree
name: Saha, Arijit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically investigate the emergence of non-hermitian physics at the heterojunction of a type-II Dirac semi-metal (DSM) and a dirty superconductor (DSC). The non-hermiticity is introduced in the DSM through the self-energy term incorporated via the dirtiness of the superconducting material. This causes the spectra of the effective Hamiltonian to become complex, which gives rise to the appearance of the exceptional points (EPs). This complex self energy, apart from having a frequency dependence, also acquires spatial dependence as well, which is unique and can provide interesting effects related to non-hermitian physics in spectral function analysis. At an appropriate distance from the normal metal-superconductor junction of the DSC, non-hermitian degeneracies appear and a single Dirac point splits into two EPs. In the spectral function analysis, apart from the EPs, a Fermi-arc like structure also emerges, which connects the two degeneracies (EPs). The results discussed here are distinctive and possibly can be realized in spectroscopy measurements.
description: This is the published version
Dynamic Economic Relationships Among U.S. Soy Product Markets: Using a Cointegrated Vector Autoregression Approach with Directed Acyclic Graphs
Creators: name: Babula, Ronald A.
name: Bessler, David A.
name: Rogowsky, Robert A.
name: Babula, Ronald A.
name: Bessler, David A.
name: Rogowsky, Robert A.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Industrial Organization
subject: Research Methods/ Statistical Methods
subject: directed acyclic graphs
subject: cointegration
subject: vector error correction and vector autoregression models
subject: monthly U.S. soy-based markets.

description: This paper applies a combined methodology of a recently developed directed acyclic graph (DAG) analysis with Johansen and Juselius' methods of the cointegrated vector autoregression (VAR) model to a monthly U.S. system of markets for soybeans, soy meal, and soy oil. Primarily a methods paper, Johansen and Juselius' procedures are applied, with a special focus on statistically addressing information inherent in well-known sources of non-normal data behavior to illustrate the effectiveness of modeling the system as a cointegrated multi-market system. Perhaps for the first time, methods of the cointegrated VAR model are combined with DAG analysis to account for contemporaneously correlated residuals, and are applied to this U.S. soy-based system. Analysis of the error correction or cointegration space illuminates the empirical nature of policy-relevant market elasticities, price transmission parameters, and effects of important policy and institutional changes/events on U.S. soy-related markets at long-run horizons beyond a single crop cycle. A statistically strong U.S. demand for soybeans emerged as the primary cointegrating relation in the error-correction space. Analysis of the DAG-adjusted cointegrated VAR model's forecast error variance decomposition illuminates how the soy-related variables and the three U.S. soy product markets dynamically interact at alternative time horizons extending up to two-years.
A lattice model for the line tension of a sessile drop
Creators: name: Gandolfo, Daniel
name: Laanait, Lahoussine
name: Miracle-Solé, Salvador
name: Ruiz, Jean
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Within a semi--infinite thre--dimensional lattice gas model describing the coexistence of two phases on a substrate, we study, by cluster expansion techniques, the free energy (line tension) associated with the contact line between the two phases and the substrate. We show that this line tension, is given at low temperature by a convergent series whose leading term is negative, and equals 0 at zero temperature.
Factors Affecting U.S. Trade and Shipments of Information Technology Products: Computer Equipment, Telecommunications Equipment, and Semiconductors
Creators: name: Canavan, Theresa H.
name: Carr, Robert
name: Johnson, Christopher
name: Canavan, Theresa H.
name: Carr, Robert
name: Johnson, Christopher
Publisher: name: Unknown
Year: 2002
Subjects: International Development

description: Despite a recent downturn, the information technology (IT) products sector experienced a tremendous expansion in trade and shipments during the last decade and became an increasingly important component of the U.S. economy. This expansion was driven by a variety of factors such as the globalization of IT production, constant technological innovation, rapid growth in worldwide consumption, and global trade liberalization. This working paper will examine these factors, providing particular attention to the computer equipment, telecommunications equipment, and semiconductor industries.
10_SpeakerChairGuidance.pdf
Creators: name: organisers, ITAKOM
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420305
subject: Health and community services
classificationCode: 390407
subject: Inclusive education
classificationCode: 350502
subject: Employment equity and diversity
classificationCode: 330405
subject: Public participation and community engagement

description: This document is part of a Figshare collection related to planning the It Takes All Kinds of Minds (ITAKOM) neurodiversity conference, which took place in March 2023. Versions of these documents have been released as examples that may be useful to others.
A non-oscillatory face-centred finite volume method for compressible flows
Creators: name: Vila-Pérez, Jordi
name: Giacomini, Matteo
name: Sevilla, Ruben
name: Huerta, Antonio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 76M12, 76Nxx, 65M08, 65M12, 76G25, 76H05

description: This work presents the face-centred finite volume (FCFV) paradigm for the simulation of compressible flows. The FCFV method defines the unknowns at the face barycentre and uses a hybridisation procedure to eliminate all the degrees of freedom inside the cells. In addition, Riemann solvers are defined implicitly within the expressions of the numerical fluxes. The resulting methodology provides first-order accurate approximations of the conservative quantities, i.e. density, momentum and energy, as well as of the viscous stress tensor and of the heat flux, without the need of any gradient reconstruction procedure. Hence, the FCFV solver preserves the accuracy of the approximation in presence of distorted and highly stretched cells, providing a solver insensitive to mesh quality. In addition, FCFV is capable of constructing non-oscillatory approximations of sharp discontinuities without resorting to shock capturing or limiting techniques. For flows at low Mach number, the method is robust and is capable of computing accurate solutions in the incompressible limit without the need of introducing specific pressure correction strategies. A set of 2D and 3D benchmarks of external flows is presented to validate the methodology in different flow regimes, from inviscid to viscous laminar flows, from transonic to subsonic incompressible flows, demonstrating its potential to handle compressible flows in realistic scenarios.
description: 38 pages, 22 figures
Supersymmetric Ward Identities and NMHV Amplitudes involving Gluinos
Creators: name: Bidder, Steven J.
name: Dunbar, David C.
name: Perkins, Warren B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how Supersymmetric Ward identities can be used to obtain amplitudes involving gluinos or adjoint scalars from purely gluonic amplitudes. We obtain results for all one-loop six-point NMHV amplitudes in $\NeqFour$ Super Yang-Mills theory which involve two gluinos or two scalar particles. More general cases are also discussed.
description: 32 pages, minor typos fixed; one reference added
Regional Trade Agreements: Effects of the Andean and Mercosur Packs on the Venezuelan Soybean Trade and U.S. Exports
Creators: name: Reeder, John
name: Torene, Jillian A.
name: Jabara, Cathy L.
name: Babula, Ronald A.
name: Reeder, John
name: Torene, Jillian A.
name: Jabara, Cathy L.
name: Babula, Ronald A.
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: Venezuela
subject: soybeans
subject: soybean meal
subject: trade diversion
subject: Mercosur
subject: Andean Pact
subject: U.S. exports
subject: Armington-type import model
subject: price bands
subject: regional trade agreements

description: Since the mid-1990s, the two regional trade agreements in South America, the southern Mercosur Pact (among Brazil, Argentina, Paraguay and Uruguay), and the northern Andean Pact (among Venezuela, Colombia, Ecuador, Bolivia, and Peru) noticeably affected certain trade patterns between the two pacts' members and with the United States for various reasons discussed herein. The effect of trade diversion owing to the Andean Pact with its common external tariff and price band system against non-Andean products was examined for soybean and soybean meal imports into Venezuela historically an important market for U.S. products. As well, the recent combining of Mercosur and Andean nations into a single regional trade agreement is likely to further adversely affect U.S. soy product sales to Venezuela. In 2003/04, the United States and Mercosur members of Brazil, Argentina, and Paraguay accounted for 94 percent of the $30 billion of world soybean and meal exports, but supplied little to Venezuela. A partial equilibrium, deterministic, and Armington-type model of the Venezuelan market for soybeans and meal was formulated by combining tariffs and the Andean price band variable levy into a single price wedge. Model results suggest that a combined Mercosur and Andean customs union under either a high or a low world soybean product price scenario would noticeably benefit Mercosur suppliers at the expense of the United States as well as adversely affect domestic Venezuelan producers (soybean processors) and fellow Andean member Bolivia.
Recent uses of connectedness in functional analysis
Creators: name: Ricceri, Biagio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47-02, 54D05

description: Perhaps, it is not too far from the truth to say that, among the great concepts (as compactness, completeness, order, convexity) on which functional analysis is based, connectedness is relatively less popular, though this does not mean that it is less useful than the others. The aim of this lecture is just to support this latter sentence, focusing some recent results where connectedness plays a central role.
description: 12 pages
Small $θ_{13}$ and solar neutrino oscillation parameters from $μ-τ$ symmetry
Creators: name: Pérez-Lorenzana, Abdel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Exchange $μ-τ$ symmetry in the effective Majorana neutrino mass matrix does predict a maximal mixing for atmospheric neutrino oscillations asides to a null mixing that cannot be straightforwardly identified with reactor neutrino oscillation mixing, $θ_{13}$, unless a specific ordering is assumed for the mass eigenstates. Otherwise, a non zero value for $θ_{13}$ is predicted already at the level of an exact symmetry. In this case, solar neutrino mixing and scale, as well as the correct atmospheric mixing, arise from the breaking of the symmetry. I present a mass matrix proposal for normal hierarchy that realizes this scenario, where the smallness of $\tanθ_{13}$ is naturally given by the parameter $ε\sim\sqrt{Δm^2_{sol}/Δm^2_{ATM}}$ and the solar mixing is linked to the smallness of $Δm^2_{sol}$. The proposed matrix remains stable under renormalization effects and it also allows to account for CP violation within the expected region without further constrains.
description: Extended version. New discussions added. Six pages, one figure
Glenthøj, Jørgen: Dokumente zur Bonhoeffer-Forschung 1928-1945
Creators: name: Boyens, Armin
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 18 Nr. 4 (1969): Ökumenische Rundschau, Band 18, Heft 4
Revealing the boundary Weyl physics of the four-dimensional Hall effect via phason engineering in metamaterials
Creators: name: Cheng, Wenting
name: Prodan, Emil
name: Prodan, Camelia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum Hall physics has been theoretically predicted in 4-dimensions and higher. In hypothetical 2n-dimensions, the topological characters of both the bulk and the boundary are manifested as quantized non-linear transport coefficients that connect, respectively, to the n-th Chern number of the bulk gap projection and to the n-th winding number of the Weyl spectral singularities on the (2n-1)-dimensional boundaries. Here, we introduce the concept of phason engineering in metamaterials and use it as a vehicle to access and apply the quantum Hall physics in arbitrary dimensions. Using these specialized design principles, we fabricate a re-configurable 2-dimensional aperiodic acoustic crystal with a phason living on a 2-torus, giving us access to the 4-dimensional quantum Hall physics. Also, we supply a direct experimental confirmation that the topological boundary spectrum assembles in a Weyl singularity when mapped as function of the quasi-momenta. We also demonstrate topological wave steering enabled by the Weyl physics of the 3-dimensional boundaries.
The neutron electric dipole form factor in the perturbative chiral quark model
Creators: name: Dib, Claudio
name: Faessler, Amand
name: Gutsche, Thomas
name: Kovalenko, Sergey
name: Kuckei, Jan
name: Lyubovitskij, Valery E.
name: Pumsa-ard, Kem
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the electric dipole form factor of the neutron in a perturbative chiral quark model, parameterizing CP-violation of generic origin by means of effective electric dipole moments of the constituent quarks and their CP-violating couplings to the chiral fields. We discuss the relation of these effective parameters to more fundamental ones such as the intrinsic electric and chromoelectric dipole moments of quarks and the Weinberg parameter. From the existing experimental upper limits on the neutron EDM we derive constraints on these CP-violating parameters.
description: 20 pages, 3 figures
2_CallForStories.pdf
Creators: name: organisers, ITAKOM
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 330405
subject: Public participation and community engagement
classificationCode: 390407
subject: Inclusive education
classificationCode: 350502
subject: Employment equity and diversity
classificationCode: 420305
subject: Health and community services

description: This document is part of a Figshare collection related to planning the It Takes All Kinds of Minds (ITAKOM) neurodiversity conference, which took place in March 2023. Versions of these documents have been released as examples that may be useful to others.