cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of the decay $B^0 \to χ_{c1} π^0$ with light-cone QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we calculate the contribution from the nonfactorizable soft hadronic matrix element to the decay $B^0\to χ_{c1} π^0$ with the light-cone QCD sum rules. The numerical results show that its contribution is rather large and should not be neglected. The total amplitudes lead to a branching fraction which is in agreement with the experimental data marginally.
description: 11 pages, 1 figure, revised version
Kompetenzorientierte Medienpädagogik als integraler Bestandteil der schulischen Bildung
Creators: name: Brandhofer, Gerhard
name: Fikisz, Walter
Publisher: name: Medienimpulse
Year: 2016

description: Dieser Beitrag widmet sich im Sinne einer kompetenzorientierten Schulpädagogik der Frage, welche Kompetenzen durch die Verwendung von Social Media erarbeitet werden können. Nach einer Analyse über die grundlegenden Aufgaben kompetenzorientierter Medienpädagogik erfolgt ein Blick auf entwicklungspsychologische Aspekte: Ab wann eignet sich der Einsatz von Social Media und welche entwicklungspsychologischen Aufgaben können damit unterstützt werden. Schließlich sollen anhand konkreter Themen Umsetzungsmöglichkeiten exemplarisch dargestellt werden.
description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
X-ray powder diffraction studies of LixMo0₂
Creators: name: Sacken, Ulrich Gustav Von
Publisher: name: University of British Columbia
Year: 2010

description: Debye-Scherrer x-ray powder photography is used to study the dependence of the host lattice parameters of LixMoCO₂ (0 ≤ x≤ 1) upon the lithium content (x). The results indicate that the host lattice expands considerably as x increases but that the lattice reassumes its original structure when the lithium is removed. Intercalating one equivalent of lithium (x = 1) causes a considerable (~13%) increase in the unit cell volume. This expansion is confined to directions perpendicular to the tunnels through the MoO₂ lattice. Detailed measurements are made of the voltage V(x) of Li/LixMoO₂ cells. These and the x-ray patterns both indicate that LixMoO₂ occurs in three distinct compositional phases with approximate compositions of MoO₂, Li1/2MoO₂ and LiMoO₂. First-order transitions involving pronounced hysteresis effects are observed as the lithium content is altered. A brief discussion of the electrochemical properties of the LixMoO₂ system in terms of a lattice gas model is included.
Emergent correlated phases in rhombohedral trilayer graphene induced by proximity spin-orbit and exchange coupling
Creators: name: Zhumagulov, Yaroslav V.
name: Kochan, Denis
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: graphene, spintronics, correlations
subject: 530 Physik

description: The impact of proximity-induced spin-orbit and exchange coupling on the correlated phase diagram of rhombohedral trilayer graphene (RTG) is investigated theoretically. By employing ab initio-fitted effective models of RTG encapsulated by transition metal dichalcogenides (spin-orbit proximity effect) and ferromagnetic Cr2Ge2Te6 (exchange proximity effect), we incorporate the Coulomb interactions within the random-phase approximation to explore potential correlated phases at different displacement fields and doping. We find a rich spectrum of spin-valley resolved Stoner and intervalley coherence instabilities induced by the spin-orbit proximity effects, such as the emergence of a spin-valley-coherent phase due to the presence of valley-Zeeman coupling. Similarly, proximity exchange removes the phase degeneracies by biasing the spin direction, enabling a magnetocorrelation effect—strong sensitivity of the correlated phases to the relative magnetization orientations (parallel or antiparallel) of the encapsulating ferromagnetic layers.
Velocity gradients statistics along particle trajectories in turbulent flows: the refined similarity hypothesis in the Lagrangian frame
Creators: name: Benzi, Roberto
name: Biferale, Luca
name: Calzavarini, Enrico
name: Lohse, Detlef
name: Toschi, Federico
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present an investigation of the statistics of velocity gradient related quantities, in particluar energy dissipation rate and enstrophy, along the trajectories of fluid tracers and of heavy/light particles advected by a homogeneous and isotropic turbulent flow. The Refined Similarity Hypothesis (RSH) proposed by Kolmogorov and Oboukhov in 1962 is rephrased in the Lagrangian context and then tested along the particle trajectories. The study is performed on state-of-the-art numerical data resulting from numerical simulations up to Re~400 with 2048^3 collocation points. When particles have small inertia, we show that the Lagrangian formulation of the RSH is well verified for time lags larger than the typical response time of the particle. In contrast, in the large inertia limit when the particle response time approaches the integral-time-scale of the flow, particles behave nearly ballistic, and the Eulerian formulation of RSH holds in the inertial-range.
description: 7 pages, 7 figures; Physical Review E (accepted Dec 7, 2009)
Die Bildungsmediale 2016: Digitaler Wandel – Wege in die Zukunft
Creators: name: Müller, Elisabeth
name: Stewen, Christian
Publisher: name: Medienimpulse
Year: 2016

description: Der diesjährige Nationale IT-Gipfel im November wird ganz im Zeichen der Bildung stehen und auch die Kultusministerkonferenz will bis Ende des Jahres eine umfassende Strategie für die Bildung in der digitalen Welt in Deutschland verabschieden – ein weiteres Zeichen dafür, dass Digitale Bildung längst ein zentrales schul- und bildungspolitisches Thema geworden ist.
description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
Proximity-induced spin-orbit coupling in phosphorene on a WSe₂ monolayer
Creators: name: Milivojevic, Marko
name: Gmitra, Martin
name: Kurpas, Marcin
name: Stich, Ivan
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: Spintronics, phosphorene, proximity effects
subject: 530 Physik

description: We investigate, using first-principles methods and effective-model simulations, the spin-orbit coupling proximity effects in a bilayer heterostructure comprising phosphorene and WSe2 monolayers. We specifically analyze holes in phosphorene around the Γ point, at which we find a significant increase of the spin-orbit coupling that can be attributed to the strong hybridization of phosphorene with the WSe2bands. We also propose an effective spin-orbit model based on the C1v symmetry of the studied heterostructure. The corresponding spin-orbit field can be divided into two parts: the in-plane field, present due to the broken nonsymmorphic horizontal glide mirror plane symmetry, and the dominant out-of-plane field triggered by breaking the out-of-plane rotational symmetry of the phosphorene monolayer. Furthermore, we also demonstrate that a heterostructure with 60∘ twist angle exhibits an opposite out-of-plane spin-orbit field, indicating that the coupling can effectively be tuned by twisting. The studied phosphorene/WSe2 bilayer is a prototypical low common-symmetry heterostructure in which the proximity effect can be used to engineer the spin texture of the desired material.
Infinite-Dimensional Linear Algebra and Solvability of Partial Differential Equations
Creators: name: Todorov, Todor D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary: 15A03, 35A01, 35D35, 35E20, 35J15, 46F05, 46F10, 47F05 Secondary: 46S20, 46F30

description: We discuss linear algebra of infinite-dimensional vector spaces in terms of algebraic (Hamel) bases. As an application we prove the surjectivity of a large class of linear partial differential operators with smooth ($\mathcal C^\infty$-coefficients) coefficients, called in the article \emph{regular}, acting on the algebraic dual $\mathcal D^*(Ω)$ of the space of test-functions $\mathcal D(Ω)$. The surjectivity of the partial differential operators guarantees solvability of the corresponding partial differential equations within $\mathcal D^*(Ω)$. We discuss our result in contrast to and comparison with similar results about the restrictions of the regular operators on the space of Schwartz distribution $\mathcal D^\prime(Ω)$, where these operators are often non-surjective.
description: 34 pages
Spielerezension: Block'hood – Nachhaltiger Wohnungsbau als Aufbaustrategiespiel
Creators: name: Kunze, Thomas
Publisher: name: Medienimpulse
Year: 2016

description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
Polymer quantization, singularity resolution and the 1/r^2 potential
Creators: name: Kunstatter, G.
name: Louko, J.
name: Ziprick, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a polymer quantization of the -lambda/r^2 potential on the positive real line and compute numerically the bound state eigenenergies in terms of the dimensionless coupling constant lambda. The singularity at the origin is handled in two ways: first, by regularizing the potential and adopting either symmetric or antisymmetric boundary conditions; second, by keeping the potential unregularized but allowing the singularity to be balanced by an antisymmetric boundary condition. The results are compared to the semiclassical limit of the polymer theory and to the conventional Schrodinger quantization on L_2(R_+). The various quantization schemes are in excellent agreement for the highly excited states but differ for the low-lying states, and the polymer spectrum is bounded below even when the Schrodinger spectrum is not. We find as expected that for the antisymmetric boundary condition the regularization of the potential is redundant: the polymer quantum theory is well defined even with the unregularized potential and the regularization of the potential does not significantly affect the spectrum.
description: 21 pages, LaTeX including 7 figures. v2: analytic bounds improved; references added
Cybermobbing-Filmprojekt "Setze ein Zeichen!"
Creators: name: Weberhofer, Caroline
Publisher: name: Medienimpulse
Year: 2016

description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance
Creators: name: Jozwiak, C.
name: Graf, J.
name: Zhou, S. Y.
name: Bostwick, A.
name: Rotenberg, Eli
name: Zheng, H.
name: Mitchell, J. F.
name: Lanzara, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By performing angle-resolved photoemission spectroscopy of the bilayer colossal magnetoresistive (CMR) manganite, $La_{2-2x}Sr_{1+2x}Mn_{2}O_{7}$, we provide the complete mapping of the Fermi level spectral weight topology. Clear and unambiguous bilayer splitting of the in-plane 3d$_{x^2-y^2}$ band, mapped throughout the Brillouin zone, and the full mapping of the 3d$_{3z^2-r^2}$ band are reported. Peculiar doping and temperature dependencies of these bands imply that as transition from the ferromagnetic metallic phase approaches, either as a function of doping or temperature, coherence along the c-axis between planes within the bilayer is lost, resulting in reduced interplane coupling. These results suggest that interplane coupling plays a large role in the CMR transition.
description: 8 pages, 6 figures
Proximity-enabled control of spin-orbit coupling in phosphorene symmetrically and asymmetrically encapsulated by WSe₂ monolayers
Creators: name: Milivojevic, Marko
name: Gmitra, Martin
name: Kurpas, Marcin
name: Stich, Ivan
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: Spintronics, graphene, proximity effects
subject: 530 Physik

description: We analyze, using first-principles calculations and the method of invariants, the spin-orbit proximity effects in trilayer heterostructures comprising phosphorene and encapsulating WSe2 monolayers. We focus on four different configurations, in which the top/bottom WSe2 monolayer is twisted by 0 or 60 degrees with respect to phosphorene and analyze the spin-splitting of phosphorene hole bands around the point. Our results show that the spin texture of phosphorene hole bands can be dramatically modified by different encapsulations of phosphorene monolayer. For a symmetrically encapsulated phosphorene, the momentum-dependent spin-orbit field has the out-of-plane component only, simulating the spin texture of phosphorenelike group-IV monochalcogenide ferroelectrics. Furthermore, we reveal that the direction of the out-of-plane spin-orbit field can be controlled by switching the twist angle from 0 to 60 degrees. Finally, we show that the spin texture in asymmetrically encapsulated phosphorene has the dominant in-plane component of the spin-orbit field, comparable to the Rashba effect in phosphorene with an applied sizable external electric field. Our results confirm that the significant modification and control of the spin texture is possible in low common-symmetry heterostructures, paving the way for using different substrates to modify spin properties in materials important for spintronics.
Power and Energy Magazine Volumen 18 • Número 6 • noviembre/diciembre 2020: Hacia adelante y en ascenso
Creators: Naomi Stringer
Benjamin Kroposki
Kazuhiko Ogimoto
Ricardo Guerrero Lemus
Tom Key
Richard Fioravanti
Publisher: name: IEEE
Year: 2020

El tema general de este número es la integración de los recursos energéticos distribuidos (DER).
El tema general de este número es la integración de los recursos energéticos distribuidos (DER).
Exploring Spin Symmetry-Breaking Effects for Static Field Ionization of Atoms: Is There an Analog to the Coulson-Fischer Point in Bond Dissociation?
Creators: name: Cunha, Leonardo A.
name: Lee, Joonho
name: Hait, Diptarka
name: McCurdy, C. William
name: Head-Gordon, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Löwdin's symmetry dilemma is an ubiquitous issue in approximate quantum chemistry. In the context of Hartree-Fock (HF) theory, the use of Slater determinants with some imposed constraints to preserve symmetries of the exact problem may lead to physically unreasonable potential energy surfaces. On the other hand, lifting these constraints leads to the so-called broken symmetry solutions that usually provide better energetics, at the cost of losing information about good quantum numbers that describe the state of the system. This behavior has been previously extensively studied in the context of bond dissociation. This paper studies the behavior of different classes of Hartree-Fock spin polarized solutions (restricted, unrestricted, generalized) in the context of ionization by strong static electric fields. We find that, for simple two-electron systems, UHF is able to provide a qualitatively good description of states involved during the ionization process (neutral, singly-ionized and doubly ionized states), whereas RHF fails to describe the singly ionized state. For more complex systems, even though UHF is able to capture some of the expected characteristics of the ionized states, it is constrained to a single $M_s$ (diabatic) manifold in the energy surface as a function of field intensity. In this case a better qualitative picture can be painted by GHF as it is able to explore different spin manifolds and follow the lowest solution due to lack of collinearity constraints on the spin quantization axis.
How has the minimum support price policy of India affected cross-commodity price linkages?
Creators: name: Morales, Luis Emilio
name: Balie, Jean
name: Magrini, Emiliano
name: Morales, Luis Emilio
name: Balie, Jean
name: Magrini, Emiliano
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: Demand and Price Analysis
subject: commodity prices
subject: minimum support prices
subject: panel vector auto-regression
subject: India

description: For several decades, the government of India has implemented a minimum support price (MSP) policy for agricultural commodities to reduce price risk levels for farmers. Concerns have been raised about whether this policy could affect market integration of related agricultural products, modify price incentives, and ultimately alter resource allocation and production between commodities. This study uses a panel vector auto-regression model across six states for the period 2002-2017 to analyse the effects of the MSP on the transmission of price shocks between cereals and oilseeds. The results demonstrate that the MSP partially and completely offsets price linkages between agricultural commodities, potentially introducing distortions in price incentives that affect land allocation and production between commodities. Beyond the effects of the MSP across commodities, Indian authorities can expect that price shocks on maize be transmitted to soybean over the next production period. Finally, this study demonstrates that the use of alternative data frequencies can identify differences in market reactions over time that can be related to production cycles and delays in price transmission.
Power and Energy Magazine - Volume 18: Issue 6 - November/December 2020: Onward and Upward
Creators: Naomi Stringer
Benjamin Kroposki
Kazuhiko Ogimoto
Ricardo Guerrero Lemus
Tom Key
Richard Fioravanti
Publisher: name: IEEE
Year: 2020

The overall theme of this issue is the integration of distributed energy resources (DERs).
The overall theme of this issue is the integration of distributed energy resources (DERs).
Mobility in Graphene Double Gate Field Effect Transistors
Creators: name: Lemme, M. C.
name: Echtermeyer, T. J.
name: Baus, M.
name: Szafranek, B. N.
name: Bolten, J.
name: Schmidt, M.
name: Wahlbrink, T.
name: Kurz, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, double-gated field effect transistors manufactured from monolayer graphene are investigated. Conventional top-down CMOS-compatible processes are applied except for graphene deposition by manual exfoliation. Carrier mobilities in single- and double gated graphene field effect transistors are compared. Even in double-gated graphene FETs, the carrier mobility exceeds the universal mobility of silicon over nearly the entire measured range. At comparable dimensions, reported mobilities for ultra thin body silicon-on-insulator MOSFETs can not compete with graphene FET values.
description: 7 pages, 9 figures
Power and Energy Magazine - Volume 19: Issue 1- January/February 2021: Choice in Tools and Design
Creators: Carlos Batlle
Frank A. Wolak
Erik Ela
Goran Strbac
Luiz Barroso
Tonci Bakovic
Publisher: name: IEEE
Year: 2021

This issue of IEEE Power & Energy Magazine on the zero- marginal-cost electricity markets addresses the changes re- quired in market design and market instruments to accom- modate an increasing share of renewable production that  has an exceptionally low marginal cost.
This issue of IEEE Power & Energy Magazine on the zero-
Rezension: Gespenster meines Lebens. Depression, Hauntology und die verlorene Zukunft
Creators: name: Lenhart, Johanna
Publisher: name: Medienimpulse
Year: 2016

description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
Rezension: artefrakte. Holocaust und Zweiter Weltkrieg in experimentellen Darstellungsformen in Literatur und Kunst.
Creators: name: Nagy, Simon
Publisher: name: Medienimpulse
Year: 2016

description: Bereits der Neologismus des Titels "artefrakte" verweist auf die Intention des Sammelbandes: In sechzehn Beiträgen werden Kunstwerke untersucht, die mit tradierten Darstellungsmustern brechen, um in gebrochener Form über die künstlerischen Möglichkeiten der Repräsentation der Shoah zu reflektieren.
description: Medienimpulse, Bd. 54 Nr. 3 (2016): 3/2016 - Mediales Lernen/Lehren im Fremdsprachenunterricht/beim Spracherwerb
Macroscopic quantum electrodynamics and duality
Creators: name: Buhmann, Stefan Yoshi
name: Scheel, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss under what conditions the duality between electric and magnetic fields is a valid symmetry of macroscopic quantum electrodynamics. It is shown that Maxwell's equations in the absence of free charges satisfy duality invariance on an operator level, whereas this is not true for Lorentz forces and atom--field couplings in general. We prove that derived quantities like Casimir forces, local-field corrected decay rates as well as van-der-Waals potentials are invariant with respect to a global exchange of electric and magnetic quantities. This exact symmetry can be used to deduce the physics of new configurations on the basis of already established ones.
description: 4 pages, minor corrections
Foliage and bark as modifiers for plywood urea-formaldehyde resins
Creators: name: Rosales Urbano, Danilo Adolfo
Publisher: name: University of British Columbia
Year: 2010

description: This work follows successful research by staff members at Forintek Canada Corp. in modifying and extending phenol-formaldehyde (PF) plywood resins with powdered tree foliages and barks. In the present study, two urea-formaldehyde (UF) resins, one commercial and one laboratory synthesized, were modified at 15, 30 and 45% addition levels with finely ground white spruce [Picea glauca (Moench.) Voss] foliage or western hemlock [Tsuga heterophylla (Raf.) Sarg.] bark. Two five-ply Douglas-fir [Pseudotsuga mensiezii (Mirb.) Franco] test plywood panels (38 x 38 cm) were made at 32kg/l00 m² double glueline spread level, six and ten min pressing time at 149°C. The commercial and laboratory synthesized wheat flour extended UF resins were used as controls. Shear strengths and wood failure percentages were recorded for sets of test specimens after conditioning at 22°C and EMC of about 6% (Dry test), one vacuum pressure cycle, five vacuum pressure cycles and boiling cycle. Most formulations with the commercial UF resin containing foliage or bark yielded good bond quality (wood failure and shear strength) similar to the control when tested dry and after one vacuum pressure cycle. Following multi-cycle testing, one formulation containing foliage gave similar wood failure percentage to the control. Two formulations containing bark improved glue bond durability yielding 3 to 12% higher wood failure than the control. Results with the laboratory resin were not as good, showing bond quality lower than with the commercial UF formulation. No formulation survived boiling treatment implying that no modification among those used improved UF resin durability under conditions of high moisture and-temperature. Both UF resins were successfully extended by various foliage and bark additions. It was found that both materials can be used as partial substitutes for the conventional extender wheat flour up to the 40% level. This information may be of use to some developing countries that import wheat to flour-extended UF resins used to bond interior grade plywoods. Such countries could benefit by making use of local tree foliages or barks.
Gesundheitswälder Schweiz: Wertschöpfung für die Waldbranche, den Tourismus und das Gesundheitswesen
Creators: name: Gubsch, Marlén
name: Eggenberger, Tanja
name: Bernasconi, Andreas
name: Föhn, Martina
Publisher: name: Zenodo
Year: 2023

description: Die Ressource Wald bietet ein grosses Potential für die Entwicklung gesundheitstouristischer Angebote und mit dem Aufbau innovativer Partnerschafts- und Geschäftsmodelle auch die Möglichkeit Wertschöpfung für die Waldbranche zu erzielen. Anhand von Fallbeispielen wurden Grundlagen entwickelt für die zukünftige Etablierung von Gesundheitswäldern in der Schweiz. Die resultierende ‘Toolbox Gesundheitswälder Schweiz’ enthält Grundlagen zur gesundheitsfördernden Wirkung des Waldes, eine Übersicht und ein Raster zur Analyse gesundheitsfördernder Waldleistungen sowie zum Aufbau von Geschäftsmodellen für gesundheitsfördernde Angeboten im Wald und mögliche Finanzierungsmechanismen. Für die analysierten Fallbeispiele wurden Faktenblätter und Geschäftsmodelle ausgearbeitet.
Discounted cash flow valuation of conventional and cage-free production investments
Creators: name: Trejo-Pech, Carlos J.O.
name: Thompson, Jada M.
name: Trejo-Pech, Carlos J.O.
name: Thompson, Jada M.
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: discounted cash flow valuation
subject: stochastic simulation
subject: financial modeling
subject: cage-free egg production

description: This study compares profitability and risk of conventional and cage-free egg production in the United States. Evaluating cage-free production is particularly relevant given ongoing consumer driven changes and new cage-free legislation. Results show that while the Modified Internal Rate of Return (MIRR) for conventional production is above an estimated industry opportunity cost of capital, cage-free production’s MIRR does not fully satisfy investors’ expectations. The MIRR of cage-free investment, between 5.6% (deterministic model) and 8.0% (stochastic) per 15-month flock, is below the 9.4% opportunity cost of capital. In addition, the simulations show that there is a 90% probability of conventional production’s MIRR falling between 18.5 and 20.3% per 15-month flock, and cage-free egg production’s MIRR ranging from 6.8 to 9.4%. In order for cage-free to be as equally profitable as conventional production, cage-free egg prices at the farmer gate should be 74% over conventional egg prices. Such high cage-free egg prices are highly unlikely to occur given recent cage-free price premia and consumer willingness to pay estimates from recent research. This study provides a framework egg producers can use to evaluate the potential effects of changes in their portfolio of products (i.e. conventional and cage-free mix) as they accommodate production schedules in this evolving industry.
Rural extension and technical efficiency in the Brazilian agricultural sector
Creators: name: Freitas, Carlos Otavio De
name: Silva, Felipe De Figueiredo
name: Braga, Marcelo Jose
name: Neves, Mateus De Carvalho Reis
name: Freitas, Carlos Otavio De
name: Silva, Felipe De Figueiredo
name: Braga, Marcelo Jose
name: Neves, Mateus De Carvalho Reis
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: International Development
subject: rural extension
subject: entropy balancing
subject: stochastic production frontier
subject: technical efficiency

description: In this paper, we identify the effect of rural extension on the productive performance of Brazilian agricultural establishments, using technical efficiency as a measure of farm performance. The data used is drawn from the microdata of the 2006 Agricultural Census, accessed directly from the IBGE secrecy room. For this, we use an approach that combines the stochastic production frontier, considering selection bias in the adoption of rural extension (Heckman’s approach) and entropy balancing. We find that rural extension increases efficiency in the use of the productive inputs, with more technical efficiency found among adopting producers than non-adopters. When considering the differences according to farm size, an even greater effect is observed for larger producers. In addition, public rural extension generates higher technical efficiency scores than those obtained by privately-operated establishments.
Willkommen in Deutschland!
Creators: name: Toth, Christian
name: Rollmann, Olga
Publisher: name: Medienimpulse
Year: 2017

description: In der vorliegenden Analyse wurden die Beiträge der gesamten Rubrik 'Flucht nach Europa' der Mediathek des Kindernachrichtensenders logo! interpretativ untersucht. Für die Analyse waren die Form und Gestaltung der Berichterstattung sowie das inhaltliche und formale 'framing' und damit verbundene (un-)intendierte meinungsbildende Prozesse besonders interessant. Die Analyse zeigte, dass insgesamt positiv über Geflüchtete berichtet wird und die Art der Berichterstattung und die inhaltliche und visuelle Aufarbeitung der Themen Kindern eine deutsche Willkommenskultur für Geflüchtete suggerieren. Diese Ergebnisse werden vor dem Hintergrund der Darstellung Geflüchteter in 'Erwachsenennachrichtenformaten', der Funktion und Wirkungsweise von Framingeffekten sowie der Ansprüche und Qualitätskriterien von Kindernachrichtensendungen diskutiert.
description: Medienimpulse, Bd. 55 Nr. 3 (2017): 3/2017 - Medien und Flucht – Medienpädagogische Perspektiven
Automated Gain Control Through Deep Reinforcement Learning for Downstream Radar Object Detection
Creators: name: Stevens, Tristan S. W.
name: Tigrek, R. Firat
name: Tammam, Eric S.
name: van Sloun, Ruud J. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Cognitive radars are systems that rely on learning through interactions of the radar with the surrounding environment. To realize this, radar transmit parameters can be adapted such that they facilitate some downstream task. This paper proposes the use of deep reinforcement learning (RL) to learn policies for gain control under the object detection task. The YOLOv3 single-shot object detector is used for the downstream task and will be concurrently used alongside the RL agent. Furthermore, a synthetic dataset is introduced which models the radar environment with use of the Grand Theft Auto V game engine. This approach allows for simulation of vast amounts of data with flexible assignment of the radar parameters to aid in the active learning process.
description: 5 pages, 5 figures, conference
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Michel, Laurent D.
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2021
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Mathematics of computing → Solvers
subject: Hardware → Theorem proving and SAT solving
subject: Theory of computation → Constraint and logic programming
subject: Software and its engineering → Constraints
subject: Computing methodologies → Machine learning
subject: Mathematics of computing → Mathematical optimization

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 210, 27th International Conference on Principles and Practice of Constraint Programming (CP 2021), pages 0:i-0:xxii
H-ModQuad: Modular Multi-Rotors with 4, 5, and 6 Controllable DOF
Creators: name: Xu, Jiawei
name: D'Antonio, Diego S.
name: Saldaña, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Traditional aerial vehicles are usually custom-designed for specific tasks. Although they offer an efficient solution, they are not always able to adapt to changes in the task specification, e.g., increasing the payload. This applies to quadrotors, having a maximum payload and only four controllable degrees of freedom, limiting their adaptability to the task's variations. We propose a versatile modular robotic system that can increase its payload and degrees of freedom by assembling heterogeneous modules; we call it H-ModQuad. It consists of cuboid modules propelled by quadrotors with tilted propellers that can generate forces in different directions. By connecting different types of modules, an H-ModQuad can increase its controllable degrees of freedom from 4 to 5 and 6. We model the general structure and propose three controllers, one for each number of controllable degrees of freedom. We extend the concept of the actuation ellipsoid to find the best reference orientation that can maximize the performance of the structure. Our approach is validated with experiments using actual robots, showing the independence of the translation and orientation of a structure.
description: 6 pages plus reference, ICRA 2021
Star Formation Rates and Metallicities of K-selected Star Forming Galaxies at z~2
Creators: name: Hayashi, Masao
name: Motohara, Kentaro
name: Shimasaku, Kazuhiro
name: Onodera, Masato
name: Uchimoto, Yuka Katsuno
name: Kashikawa, Nobunari
name: Yoshida, Makiko
name: Okamura, Sadanori
name: Ly, Chun
name: Malkan, Matthew A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present spectroscopy of 15 star-forming BzK galaxies (sBzKs) with K(AB)<23 in the Subaru Deep Field, for which Halpha and some other emission lines are detected in 0.9 to 2.3 micron spectra with a resolution of R=500. Using Halpha luminosities, we obtain star formation rates (SFRs), and then specific SFRs (SSFRs) dividing SFRs by stellar masses, which are derived from SED fitting to BVRi'z'K photometry. It is found that sBzKs with higher stellar masses have larger SFRs. A negative correlation is seen between stellar mass and SSFR, which is consistent with the previous results for z~2 galaxies. This implies that a larger growth of stellar mass occurs in less massive galaxies. In addition, gas-phase oxygen abundances, 12+log(O/H), are derived from the ratio of NII(lambda 6584) to Halpha using the N2 index method. We have found a correlation between stellar mass and oxygen abundance in the sense that more massive sBzKs tend to be more metal rich, which is qualitatively consistent with the relation for UV-selected z~2 galaxies. However, the metallicity of the sBzKs is ~0.2 dex higher than that of UV-selected galaxies with similar stellar masses, which is significant considering the small uncertainties. The sBzKs in our sample have redder R-K colors than the UV-selected galaxies. This galaxy color-dependence in the oxygen abundance may be caused by older or dustier galaxies having higher metallicities at z~2.
description: 20 pages, 13 figures, 2 tables, accepted for publication in The Astrophysical Journal
Medieninklusion für Geflüchtete im Freien Mediensektor
Creators: name: Diabl, Christian
name: Fisch, Der
name: Rodgarkia-Dara, Lale
Publisher: name: Medienimpulse
Year: 2017

description: Dabei geht es um ein Projekt in Linz, dass sich als als Teil der medienpädagogischen Aufgabe des Freien Radios versteht und ein weiteres Projekt in Wien, bei dem der Fokus des Radiomachens auf dem Nutzen des Mediums Radio liegt, mit dem reflektiert Distanz geschaffen werden kann, um als emanzipatorisches Tool zur Alltags- und Lebensgestaltung zu dienen.
description: Medienimpulse, Bd. 55 Nr. 3 (2017): 3/2017 - Medien und Flucht – Medienpädagogische Perspektiven
Iron Rain: measuring the occurrence rate and origin of small iron meteoroids at Earth
Creators: name: Mills, Tristan
name: Brown, P. G.
name: Mazur, M. J.
name: Vida, D.
name: Gural, Peter S.
name: Moorhead, Althea V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report results of a four-year survey using Electron Multiplied Charged Coupled Device (EMCCD) cameras recording 34761 two-station video meteor events complete to a limiting magnitude of +6. The survey goal was to characterize probable iron meteoroids. Using only physical properties of the meteor trajectories including early peaking light curves, short luminous trajectories, and high energies accumulated per area at beginning, we identified 1068 iron meteors. Our iron candidates are most abundant at slow speeds < 15 km/s, where they make up approximately 20% of the mm-sized meteoroid population. They are overwhelmingly on asteroidal orbits, and have particularly low orbital eccentricities and smaller semi-major axes when compared to non-irons between 10-20 km/s. Our iron population appears to be more numerous at fainter magnitudes, comprising 15% of slow (10-15 km/s) meteors with peak brightness of +3 with the fraction rising to 25% at +6 to +7, our survey limit. The iron orbits are most consistent with an asteroidal source and are in highly evolved orbits, suggesting long collisional lifetimes (107 years). Metal-rich chondrules (nodules) found in abundance in EL Chondrites are one possible source for this population. We also propose a possible technique using R-band colours to more robustly identify fainter iron meteors with very high confidence.
description: Accepted for publication in MNRAS on September 21st, 2021. 13 pages, 21 figures
Probability and complex quantum trajectories
Creators: name: John, Moncy V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It is shown that in the complex trajectory representation of quantum mechanics, the Born's Psi^{\star}Ψprobability density can be obtained from the imaginary part of the velocity field of particles on the real axis. Extending this probability axiom to the complex plane, we first attempt to find a probability density by solving an appropriate conservation equation. The characteristic curves of this conservation equation are found to be the same as the complex paths of particles in the new representation. The boundary condition in this case is that the extended probability density should agree with the quantum probability rule along the real line. For the simple, time-independent, one-dimensional problems worked out here, we find that a conserved probability density can be derived from the velocity field of particles, except in regions where the trajectories were previously suspected to be nonviable. An alternative method to find this probability density in terms of a trajectory integral, which is easier to implement on a computer and useful for single particle solutions, is also presented. Most importantly, we show, by using the complex extension of Schrodinger equation, that the desired conservation equation can be derived from this definition of probability density.
description: Accepted for publication in Annals of Physics
Biological availability of minerals from organic and inorganic sources for the chick
Creators: name: Aw-Yong, Lai Mon
Publisher: name: University of British Columbia
Year: 2010

description: Availability of six minerals (Ca, P, Mg, Mn, Zn, and Cu) in commercial wheat, triticale, corn and barley samples was estimated with three-week old growing chicks. Effects of soybean meal and wheat fed at different dietary concentration on availability of these minerals were studied. The availability of minerals from specific inorganic sources were also evaluated. Availability value was determined by a balance procedure corrected for endogenous minerals. Results indicated that the availability of calcium, phosphorus, magnesium, manganese, zinc, and copper was 71.0, 67.4, 53.5, 48.4, 49.6 and 78.5%, respectively for the wheat and triticale samples. Copper availability was the highest in corn (87.2%), followed by calcium (70.0%), phosphorus (60.9%), manganese (60.0%), zinc (57.5%) and magnesium (51.0%). The availability of Ca, P, Mg, Mn, Zn and Cu in barley was 68.9, 68.8, 54.9, 54.9, 49.1 and 77.5%, respectively. Significant variation (P ≤ 0.05) exists among the cereal grains tested. Results indicate that mineral availability is influenced by the origin of the samples obtained. Availability of minerals is affected by the concentration of ingredients in the test diet. Significant differences (P ≤ 0.05) were observed in availability for all the minerals tested when soybean meal and wheat were supplied in the test mixture at five levels. Calcium and phosphorus from calcium phosphate were highly available to growing chicks. However, the availability decreased rapidly when the mineral level was in excess of the dietary requirement. Six levels of magnesium (150, 300, 450, 600, 750, and 900 ppm) from magnesium carbonate were evaluated. Results showed that magnesium was highly available to growing chicks. The values ranged from 82.3 to 61.9%. Excess amounts of magnesium in the diet tended to reduce the availability value. Various levels (25, 50, 75, 100 and 125 ppm) of manganese from manganese sulfate were tested. Manganese appeared to be poorly available for the levels tested. Zinc availability from zinc oxide was highly available for the chick. The availability values/ranged from 84.4 to 93% for all the diets containing 25 to 125 ppm of zinc. The availability of copper from copper sulfate was moderate to high (72.1-80.2%) for the low dietary copper concentrations (2-32 ppm). However, the copper availability values (61.8-63.6%) tended to decrease at higher dietary concentration (50-250 ppm).
Exposing Multi-Relational Networks to Single-Relational Network Analysis Algorithms
Creators: name: Rodriguez, Marko A.
name: Shinavier, Joshua
Publisher: name: arXiv
Year: 2008
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: F.2.2; G.1.3

description: Many, if not most network analysis algorithms have been designed specifically for single-relational networks; that is, networks in which all edges are of the same type. For example, edges may either represent "friendship," "kinship," or "collaboration," but not all of them together. In contrast, a multi-relational network is a network with a heterogeneous set of edge labels which can represent relationships of various types in a single data structure. While multi-relational networks are more expressive in terms of the variety of relationships they can capture, there is a need for a general framework for transferring the many single-relational network analysis algorithms to the multi-relational domain. It is not sufficient to execute a single-relational network analysis algorithm on a multi-relational network by simply ignoring edge labels. This article presents an algebra for mapping multi-relational networks to single-relational networks, thereby exposing them to single-relational network analysis algorithms.
description: ISSN:1751-1577
Local Heterotic Torsional Models
Creators: name: Fu, Ji-Xiang
name: Tseng, Li-Sheng
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a class of smooth supersymmetric heterotic solutions with a non-compact Eguchi-Hanson space. The non-compact geometry is embedded as the base of a six-dimensional non-Kahler manifold with a non-trivial torus fiber. We solve the non-linear anomaly equation in this background exactly. We also define a new charge that detects the non-Kahlerity of our solutions.
description: 24 pages, harvmac; v2: published version, reference added
Flavor changing neutral couplings for leptons
Creators: name: Paschos, E. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The article reviews the conditions for lepton-flavor conservation in leptonic interactions. The conditions are similar to those developed in the quark sector. For neutrinos the mass eigenstates are unitary superpositions of flavor states which together with small mass differences produce neutrino oscillations. A new property for neutrinos is the fact that their masses are very small suppressing their couplings to neutral scalar fields. The results are demonstrated in several models.
description: Reference [6] has been improved with additional authors
Relations between invasion percolation and critical percolation in two dimensions
Creators: name: Damron, Michael
name: Sapozhnikov, Artëm
name: Vágvölgyi, Bálint
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35, 82B43 (Primary)

description: We study invasion percolation in two dimensions. We compare connectivity properties of the origin's invaded region to those of (a) the critical percolation cluster of the origin and (b) the incipient infinite cluster. To exhibit similarities, we show that for any $k\geq1$, the $k$-point function of the first so-called pond has the same asymptotic behavior as the probability that $k$ points are in the critical cluster of the origin. More prominent, though, are the differences. We show that there are infinitely many ponds that contain many large disjoint $p_c$-open clusters. Further, for $k>1$, we compute the exact decay rate of the distribution of the radius of the $k$th pond and see that it differs from that of the radius of the critical cluster of the origin. We finish by showing that the invasion percolation measure and the incipient infinite cluster measure are mutually singular.
description: Published in at http://dx.doi.org/10.1214/09-AOP462 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Affinity Attention Graph Neural Network for Weakly Supervised Semantic Segmentation
Creators: name: Zhang, Bingfeng
name: Xiao, Jimin
name: Jiao, Jianbo
name: Wei, Yunchao
name: Zhao, Yao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Weakly supervised semantic segmentation is receiving great attention due to its low human annotation cost. In this paper, we aim to tackle bounding box supervised semantic segmentation, i.e., training accurate semantic segmentation models using bounding box annotations as supervision. To this end, we propose Affinity Attention Graph Neural Network ($A^2$GNN). Following previous practices, we first generate pseudo semantic-aware seeds, which are then formed into semantic graphs based on our newly proposed affinity Convolutional Neural Network (CNN). Then the built graphs are input to our $A^2$GNN, in which an affinity attention layer is designed to acquire the short- and long- distance information from soft graph edges to accurately propagate semantic labels from the confident seeds to the unlabeled pixels. However, to guarantee the precision of the seeds, we only adopt a limited number of confident pixel seed labels for $A^2$GNN, which may lead to insufficient supervision for training. To alleviate this issue, we further introduce a new loss function and a consistency-checking mechanism to leverage the bounding box constraint, so that more reliable guidance can be included for the model optimization. Experiments show that our approach achieves new state-of-the-art performances on Pascal VOC 2012 datasets (val: 76.5\%, test: 75.2\%). More importantly, our approach can be readily applied to bounding box supervised instance segmentation task or other weakly supervised semantic segmentation tasks, with state-of-the-art or comparable performance among almot all weakly supervised tasks on PASCAL VOC or COCO dataset. Our source code will be available at https://github.com/zbf1991/A2GNN.
description: Accepted by IEEE Transactions on Pattern Analysis and Machine Intelligence (TAPMI 2021)