cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
From vortex molecules to the Abrikosov lattice in thin mesoscopic superconducting disks
Creators: name: Cabral, L. R. E.
name: Baelus, B. J.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Stable vortex states are studied in large superconducting thin disks (for numerical purposes we considered with radius R = 50 ξ). Configurations containing more than 700 vortices were obtained using two different approaches: the nonlinear Ginzburg-Landau (GL) theory and the London approximation. To obtain better agreement with results from the GL theory we generalized the London theory by including the spatial variation of the order parameter following Clem's ansatz. We find that configurations calculated in the London limit are also stable within the Ginzburg-Landau theory for up to ~ 230 vortices. For large values of the vorticity (typically, L > 100), the vortices are arranged in an Abrikosov lattice in the center of the disk, which is surrounded by at least two circular shells of vortices. A Voronoi construction is used to identify the defects present in the ground state vortex configurations. Such defects cluster near the edge of the disk, but for large L also grain boundaries are found which extend up to the center of the disk.
description: 15 pages, 10 figures, RevTex4, submitted to Phys. Rev. B
From the help desk: Kaplan–Meier plots with stsatrisk
Creators: name: Linhart, Jean Marie
name: Pitblado, Jeffrey S.
name: Hassell, James
name: Linhart, Jean Marie
name: Pitblado, Jeffrey S.
name: Hassell, James
Publisher: name: Unknown
Year: 2004
Subjects: subject: Research Methods/ Statistical Methods
subject: stsatrisk
subject: Kaplan–Meier
subject: survival plots

description: stsatrisk is a wrapper for sts graph that adds a table to a survival plot with at-risk information, making it easy to create graphs that follow the list of recommendations given by Pocock et al. (2002) for Kaplan–Meier plots. We use stsatrisk to create plots in the desired format with the desired information.
Large Mass Scale by Strong Gauge Dynamics with Infrared Fixed Point
Creators: name: Kobayashi, Tatsuo
name: Nakano, Hiroaki
name: Terao, Haruhiko
name: Yamada, Yoshihisa
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a mechanism for realizing the desired decoupling of strongly-coupled sector which is supposed to generate hierarchical structure of the Yukawa couplings. In our mechanism, the same strongly-coupled sector is responsible for generating a sufficiently flat potential and a large vacuum expectation value (VEV) of a gauge-singlet scalar field by suppressing its soft scalar mass and self-coupling. Vacuum instability is caused by supersymmetry-breaking A-term of order 10 TeV. We explicitly demonstrate the infrared convergence of soft scalar masses due to strongly-coupled dynamics and show the soft mass of the singlet is at most comparable to soft masses of squarks and sleptons, which are much suppressed than the A-term. The physical mass scale of the decoupling is calculated in a self-consistent way. We also reinterpret the result in terms of a RG-improved effective potential.
description: 18 pages, 4 figures, 1 table, LaTeX (PTPTeX style)
Executive Interview: Anton von Weissenfluh; Reconfiguring Supply Schemes in the Cocoa Value Chain: Organic Chocolate from Honduras for the Swiss Market
Creators: name: Fromm, Ingrid
name: Fromm, Ingrid
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: cocoa
subject: certification
subject: collaboration
subject: Honduras
subject: Switzerland

description: Numerous corporations worldwide source raw materials from developing countries, often not knowing exactly who is producing these commodities. This has been particularly the case in the chocolate and coffee industries. However, consumers in Europe, and especially in Switzerland are increasingly demanding more information on the products they buy, thus motivating corporations to find alternative ways to fulfill these demands. In response to the changing market trends, Chocolats Halba, a division of Coop, one of the largest retailers in Switzerland, has launched a pilot project that not only satisfies consumer concerns, but also embraces their corporate philosophy and values. Since 2008, Chocolats Halba has developed a collaborative relationship with organic cocoa producers in Honduras, who now have a contract scheme where they are supported in both production and certification aspects and are paid a fair price. Dr. Anton von Weissenfluh, CEO of Chocolats Halba explains the project and his long-term vision.
description: www.ifama.org
Free Fermion and Seiberg-Witten Differential in Random Plane Partitions
Creators: name: Maeda, Takashi
name: Nakatsu, Toshio
name: Takasaki, Kanehisa
name: Tamakoshi, Takeshi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A model of random plane partitions which describes five-dimensional $\mathcal{N}=1$ supersymmetric SU(N) Yang-Mills is studied. We compute the wave functions of fermions in this statistical model and investigate their thermodynamic limits or the semi-classical behaviors. These become of the WKB type at the thermodynamic limit. When the fermions are located at the main diagonal of the plane partition, their semi-classical wave functions are obtained in a universal form. We further show that by taking the four-dimensional limit the semi-classical wave functions turn to live on the Seiberg-Witten curve and that the classical action becomes precisely the integral of the Seiberg-Witten differential. When the fermions are located away from the main diagonal, the semi-classical wave functions depend on another continuous parameter. It is argued that they are related with the wave functions at the main diagonal by the renormalization group flow of the underlying gauge theory.
description: 32 pages, 3 figures, typos corrected
Bánffi Soda Limited Partnership
Creators: name: Kiserdi-Pallo, Imola
name: Baker, Gregory A.
name: Kiserdi-Pallo, Imola
name: Baker, Gregory A.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: strategy
subject: competitor analysis
subject: soda water
subject: Hungary
subject: teaching case

description: The Bánffi Soda Limited Partnership (Bánffi) case describes a small, family-owned Hungarian soda water producer. The company faces several challenges, including declining industry sales, changing market structure, and increasingly popular substitute products. The case challenges students to work with the limited company, market, and industry information that is typically available to small businesses. Students are asked to summarize the competitive situation for the company and develop and analyze several alternatives to help the company improve profitability.
description: Teaching Notes available: ifamr@ifama.org; Author video:http://www.youtube.com/user/ifamr1#p/u/10/XRwmg7ahg0M
Collision-free Trajectory Planning for Autonomous Surface Vehicle
Creators: name: Wen, Licheng
name: Yan, Jiaqing
name: Yang, Xuemeng
name: Liu, Yong
name: Gu, Yong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper, we propose an efficient and accurate method for autonomous surface vehicles to generate a smooth and collision-free trajectory considering its dynamics constraints. We decouple the trajectory planning problem as a front-end feasible path searching and a back-end kinodynamic trajectory optimization. Firstly, we model the type of two-thrusts under-actuated surface vessel. Then we adopt a sampling-based path searching to find an asymptotic optimal path through the obstacle-surrounding environment and extract several waypoints from it. We apply a numerical optimization method in the back-end to generate the trajectory. From the perspective of security in the field voyage, we propose the sailing corridor method to guarantee the trajectory away from obstacles. Moreover, considering limited fuel ASV carrying, we design a numerical objective function which can optimize a fuel-saving trajectory. Finally, we validate and compare the proposed method in simulation environments and the results fit our expected trajectory.
Ethanol Marketing and Input Procurement Practices of U.S. Ethanol Producers: 2008 Survey Results
Creators: name: Schmidgall, Timothy J.
name: Tudor, Kerry W.
name: Spaulding, Aslihan D.
name: Winter, J. Randy
name: Schmidgall, Timothy J.
name: Tudor, Kerry W.
name: Spaulding, Aslihan D.
name: Winter, J. Randy
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Resource /Energy Economics and Policy
subject: entry timing
subject: ethanol
subject: farmer-owned cooperatives
subject: industry life-cycle

description: A mail survey was used to collect information about input procurement and ethanol and co-product marketing practices from 60 U.S. ethanol production facilities. Data were used to answer questions about the conduct or behavior of ethanol producers. It was anticipated that firm conduct or behavior would be fairly homogeneous because the ethanol industry was in Stage II of the industry life-cycle, and societal support for ethanol production resulted in large volumes of publicly available information about technology and markets. Age of facility, size of facility, and type of ownership jointly explained a limited number of differences in responses across ethanol facilities, thus supporting the concept of fairly homogeneous conduct or behavior.
Weighted Composition Operators from $F(p,q,s)$ to Bloch Type Spaces on the Unit Ball
Creators: name: Zhou, Zehua
name: Chen, Renyu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Complex Variables (math.CV)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B38, 32A37, 32A38, 47B38, 32A30, 32H02

description: Let $ϕ(z)=(ϕ_1(z),...,ϕ_n(z))$ be a holomorphic self-map of $B$ and $ψ(z)$ a holomorphic function on $B$, where $B$ is the unit ball of ${\Bbbb C}^n$. Let $0-1$ and $α\geq 0,$ this paper gives some necessary and sufficient conditions for the weighted composition operator $\wco$ induced by $ϕ$ and $ψ$ to be bounded and compact between the space $\Fs$ and $α$-{\sl Bloch} space $β^α.$
description: 26 pages
Inflation in Oscillating Universe
Creators: name: Piao, Yun-Song
name: Zhang, Yuan-Zhong
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We make use of possible high energy correction to the Friedmann equation to implement the bounce and study the behavior of massive scalar field before and after bounce semianalytically and numerically. We find that the slow-roll inflation can be preceded by the kinetic dominated contraction. During this process, the field initially in the bottom of its potential can be driven by the anti-frictional force resulted from the contraction and roll up its potential hill, and when it rolls down after the bounce, it can driven a period inflation. The required e-folds number during the inflation limits the energy scale of bounce. Further unlike that expected, the field during the contraction can not be driven to arbitrary large value, even though the bounce occurs at Planck scale.
description: 6 pages, 8 eps figures
Solutions of the Bohr hamiltonian, a compendium
Creators: name: Fortunato, Lorenzo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bohr hamiltonian, also called collective hamiltonian, is one of the cornerstone of nuclear physics and a wealth of solutions (analytic or approximated) of the associated eigenvalue equation have been proposed over more than half a century (confining ourselves to the quadrupole degree of freedom). Each particular solution is associated with a peculiar form for the $V(β,γ)$ potential. The large number and the different details of the mathematical derivation of these solutions, as well as their increased and renewed importance for nuclear structure and spectroscopy, demand a thorough discussion. It is the aim of the present monograph to present in detail all the known solutions in $γ-$unstable and $γ-$stable cases, in a taxonomic and didactical way. In pursuing this task we especially stressed the mathematical side leaving the discussion of the physics to already published comprehensive material. The paper contains also a new approximate solution for the linear potential, and a new solution for prolate and oblate soft axial rotors, as well as some new formulae and comments, and an appendix on the analysis of a few interesting numerical sequences appearing in this context. The quasi-dynamical SO(2) symmetry is proposed in connection with the labeling of bands in triaxial nuclei.
description: 48 pages, 28 figures, 6 tables
Potenziale Generativer KI für den Mittelstand
Creators: name: Kintz, Maximilien
name: Beinhauer, Wolfgang
name: Bienzeisler, Bernd
name: Drawehn, Jens
name: Dworschak, Bernd
name: Engelbach, Matthias
name: Haner, Udo-Ernst
name: Kaiser, Simone
name: Klau, Dennis
name: Mackensen, Jan
name: Mozer, Pia
name: Peissner, Matthias
name: Renner, Thomas
name: Uhler, Lydia
name: Wulf, Jessica
Publisher: name: Fraunhofer-Gesellschaft
Year: 2024
Subjects: Arbeit
Künstliche Intelligenz
Machine Learning
Kleinere und mittlere Unternehmen

description: Seit der Veröffentlichung von ChatGPT im November 2022 haben die Entwicklungen im Bereich Generative KI deutlich an Fahrt aufgenommen. In kurzer Abfolge wurden - und werden immer noch - neue Modelle und Funktionen vorgestellt. Zunehmend zeichnen sich breite Einsatzmöglichkeiten in den Unternehmen ab, mit einem hohen zu erwartenden Nutzenpotenzial. Vor allem für mittelständische Unternehmen stellt es eine Herausforderung dar, die Bedeutung der Entwicklungen einzuschätzen und eine strukturierte Vorgehensweise zum Thema Generative KI zu definieren und umzusetzen. Das Ministerium für Wirtschaft, Arbeit und Tourismus Baden-Württemberg hat das Fraunhofer IAO beauftragt, mittels einer Studie eine Orientierungshilfe zu den aktuellen Entwicklungen zu bieten und konkrete Empfehlungen für den Umgang mit Generativer KI zu geben. Ein vielköpfiges Autorenteam des Fraunhofer IAO aus verschiedenen Forschungsbereichen hat, neben einer ausführlichen Literaturrecherche, 48 Expertinnen und Experten im Bereich Generativer KI zu ihren Einschätzungen befragt. Es wurden sowohl Forschungseinrichtungen, KI-Anbieter, Dienstleister als auch Anwenderunternehmen miteinbezogen. Das Ergebnis der Recherche und Befragung liegt in Form dieser Studie vor, die einen Beitrag zum bewussten und zielgerichteten Umgang mit Generativer KI in den Unternehmen leisten soll.
A Guatemalan Soycow Cooperative: Is the Whole Greater than the Sum of its Parts?
Creators: name: Blumthal, Meredith
name: Micheels, Eric T.
name: Paulson, Nicholas D.
name: Farrell, Rhett C.
name: Blumthal, Meredith
name: Micheels, Eric T.
name: Paulson, Nicholas D.
name: Farrell, Rhett C.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Soycow
subject: cooperative
subject: Guatemala
subject: teaching case

description: The introduction of soycow systems into the developing world is not a new strategy in the fight against malnutrition. Soycows have been placed in diverse locations including VietNam, India, South Africa, Honduras, and Guatemala. The success of these projects is not guaranteed, and often the soycows are not used after the initial supply of soybeans is exhausted. One of the main issues impeding long-term success of the soycow projects is that recipients may possess technical knowledge enabling them to operate the soycow, but generally lack the intangible, human resources that could provide the requisite marketing know-how needed for these projects to survive long-term. This case was developed to foster case-based teaching methods for course instruction while providing a unique context for the examination of managerial decision making.
description: Teaching Notes available upon request: ifamr@ifama.org; Author video:http://www.youtube.com/user/ifamr1?feature=mhum#p/u/8/FhUZu2lt6Ns
On the Limit of the Thermodynamic Stability Superheated Crystals and Mechanisms of Its Loss
Creators: name: Zubov, V. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using the correlative method of unsymmetrized self-consistent field for strongly anharmonic crystals, the thermodynamic stability and the mechanism its loss is studied for crystals with various types of the chemical bond. The following interaction potentials are utilized: the Lennard-Jones pairwise potential together with Axilrod - Teller three-body one for simple van der Waals crystals (solid Ar), effective interionic pairwise potential proposed by Schiff for a metal (Na) and the Girifalco potential for fullerites (C60). In the first and third cases, the FCC lattice becomes unstable because the isothermal bulk modulus BT becomes zero. For fullerites, the shearing coefficient C44 goes to zero as well. Solid Na losses its stability when other shearing coefficient CT11 - CT12 becomes zero.
description: 7 pages, 4 figures, pdf
Electro-hydrodynamics of binary electrolytes driven by modulated surface potentials
Creators: name: Mortensen, N. A.
name: Olesen, L. H.
name: Belmon, L.
name: Bruus, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the electro-hydrodynamics of the Debye screening layer that arises in an aqueous binary solution near a planar insulating wall when applying a spatially modulated AC-voltage. Combining this with first order perturbation theory we establish the governing equations for the full non-equilibrium problem and obtain analytic solutions in the bulk for the pressure and velocity fields of the electrolyte and for the electric potential. We find good agreement between the numerics of the full problem and the analytics of the linear theory. Our work provides the theoretical foundations of circuit models discussed in the literature. The non-equilibrium approach also reveals unexpected high-frequency dynamics not predicted by circuit models.
description: 9 pages including 4 figures. Accepted for PRE-
UNICA: Challenges to Deliver Sustainability in the Brazilian Sugarcane Industry
Creators: name: Chaddad, Fabio Ribas
name: Chaddad, Fabio Ribas
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: sustainability
subject: biofuels
subject: ethanol
subject: industry association
subject: teaching case

description: After a successful career at the University of São Paulo, Marcos Jank became the President and CEO of the Brazilian Sugarcane Industry Association (UNICA) in July 2007. He was hired with a mandate to establish ethanol as a global commodity and to open new markets for the industry’s sugar, ethanol and bioelectricity output. But he faced complex challenges. The main challenge related to the role of UNICA in leading industry-wide sustainability initiatives. This required coordination of 70,000 sugarcane producers and 430 processors; engagement with outside stakeholders in Brazil and abroad; and implementing programs that balanced economic, social and environmental outcomes. A second set of challenges emanated from the rapid growth and dramatic structural changes occurring in the industry. This case study describes UNICA’s unique approach to sustainability and how it is changing the industry, allowing the reader to analyze the effectiveness of this approach in delivering sustainability.
description: Teaching Notes Available: ifamr@ifama.org Author video introduction: http://www.youtube.com/user/ifamr1#p/u/7/4kZDvS7v5NA
Dark Energy, Dark Matter and Baryogenesis from a Model of a Complex Axion Field
Creators: name: Brandenberger, Robert
name: Fröhlich, Jürg
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce and study a model designed to simultaneously shed light on the mysteries connected with Baryogenesis, Dark Matter and Dark Energy. The model describes a self-interacting complex axion field whose imaginary part, a pseudo-scalar axion, couples to the instanton density of gauge fields including the hypermagnetic field. This coupling may give rise to baryogenesis in the early universe. After tracing out the gauge and matter degrees of freedom, a non-trivial effective potential for the angular component of the axion field is obtained. It is proposed that oscillations of this component around a minimum of its effective potential can be interpreted as Dark Matter. The absolute value of the axion field rolls slowly towards $0$. At late times, it can give rise to Dark Energy.
description: 11 pages, 4 figures
A Comprehensive Survey of Control Strategies for Autonomous Quadrotors
Creators: name: Kim, Jinho
name: Gadsden, S. Andrew
name: Wilkerson, Stephen A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Over the past several decades there has been a constant increase in the use of Unmanned Aerial Systems (UAS). Hence, there has also been a growth in the number of control algorithms to service the many applications embodied by these vehicles. Initially UAS were made popular by the military for Reconnaissance, Intelligence, Surveillance, and Target Acquisition (RISTA) applications. Now-a-days UAS are used for everything from crop surveys to tourism. Nowhere is this more evident than with multi-rotor Unmanned Aerial Vehicle (UAV). This paper presents a survey of control methods for multi-rotor systems, namely quadrotors. In doing so, we hope to visualize a clear path to what additional capabilities might be needed in the future. In our examination, we review many of the notable research organizations and their efforts to expand the utility of multirotor aircraft. We also summarize the basic literature definitions and control strategies for autonomous quadrotors.
description: 12 pages, 15 figures, 1 table
On stochastic switching of bistable resonant-tunneling structures via nucleation
Creators: name: Rodin, Pavel
name: Schoell, Eckehard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We estimate the critical size of the initial nucleus of the low current state in a bistable resonant tunneling structure which is needed for this nucleus to develop into a lateral switching front. Using the results obtained for deterministic switching fronts, we argue that for realistic structural parameters the critical nucleus has macroscopic dimensions and therefore is too large to be created by stochastic electron noise.
description: the extended version of the Comment on "Lifetime of metastable states in resonant-tunneling structures" to appear in Phys. Rev. B
Global Food Production under Alternative Scenarios
Creators: name: Huan-Niemi, Ellen
name: Niemi, Janne
name: Niemi, Jyrki S.
name: Huan-Niemi, Ellen
name: Niemi, Janne
name: Niemi, Jyrki S.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: global food production
subject: agriculture trade liberalisation
subject: climate policy
subject: EU agricultural subsidies
subject: economic recession

description: The aim of this study is to compare the conceivable baseline or “business as usual” scenario to four extreme alternative scenarios over the next two decades. The alternative extreme scenarios present the question of “what if” an extreme policy is implemented, what would be the forecasted impact on global food production and how the impact would differ from the plausible scenario. The baseline scenario includes the WTO draft proposal for the Doha Round, the Kyoto Protocol targets to reduce greenhouse gases emissions, and the scheduled reforms on the EU Common Agricultural Policy. The alternative scenarios are prolonged world economic recession, climate change mitigation policies with higher targets, complete removal of only EU agricultural subsidies, and total trade liberalisation for agriculture worldwide. The goal is to foresee the future under plausible and extreme circumstances or policy implementations in a rapidly changing environment for decision makers, interest groups, agribusiness firms and managers in order to support the process of policy and strategy planning.
description: www.ifama.org
Genetic variation, population structure and mating system in bigleaf maple (acer macrophyllum pursh)
Creators: name: Iddrisu, Mohammed Nurudeen
Publisher: name: University of British Columbia
Year: 2010

description: Ecological characteristics and life history traits of long lived woody plants influence their levels of genetic variation. To embark upon sound management, utilization and conservation of plant species, a thorough understanding of genetic processes affecting their persistence is essential. In this thesis, I studied genetic diversity, population structure, and mating system as well as compared genetic diversity and inferred differences in genetic processes in continuous versus fragmented populations of bigleaf maple (Acer macrophyllum Pursh). Bigleaf maple is one of the most abundant hardwood species in the Pacific Northwest and its native range extends from latitude 33° N to 51° N along the Pacific coast of North America. Genetic diversity, estimated using isozyme markers, revealed a mean expected heterozygosity (H[sub E]) of 0.152 similar to other North American angiosperm trees. The level of population differentiation was moderately low (F[sub ST] = 0.054), indicating extensive gene flow among populations. Estimated outcrossing rates in two populations were high (95%) but significantly less than one, with no biparental inbreeding evident. A relatively high level of correlated matings was found, consistent with 2-5 effective pollen donors per tree, indicating low adult density and limited pollinator dispersal. Seedling and adult populations possess similar levels of genetic variation regardless of whether populations are fragmented or continuous. However, seedling cohorts have higher levels of inbreeding than adult cohorts, on average, in both continuous and fragmented populations. Analysis of spatial genetic structure indicates non-random distribution of genotypes in all three fragmented populations and one of the three continuous populations. I found a significant positive autocorrelation (p[sub ij]= 0.20) among individuals located up to 100 m apart in all three fragmented populations and among individuals located at approximately 100-200 m apart (p[sub ij] = 0.14) in one of three continuous populations. Finally, for quantitative traits, provenances and families within provenances showed significant genetic variation for height growth and bud flush traits, but not for diameter growth. Individual heritabilities for all traits were generally low to moderate (0.15-0.21), and family heritability was higher only for bud flush. Comparison of Q[sub ST] and F[sub ST] in this study (mean Q[sub ST]= 0.17 > mean F[sub ST]= 0.09) suggests the involvement of selection for different phenotypes in different populations of bigleaf maple.
Generalized Rastall's gravity and its effects on compact objects
Creators: name: Mota, Clésio E.
name: Santos, Luis C. N.
name: da Silva, Franciele M.
name: Grams, Guilherme
name: Lobo, Iarley P.
name: Menezes, Débora P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a generalization of Rastall's gravity in which the conservation law of the energy-momentum tensor is altered, and as a result, the trace of the energy-momentum tensor is taken into account together with the Ricci scalar in the expression for the covariant derivative. Afterwards, we obtain the field equations in this theory and solve them by considering a spherically symmetric space-time. We show that the external solution has two possible classes of solutions with spherical symmetry in the vacuum in generalized Rastall's gravity, and we analyse one of them explicitly. The generalization, in contrast to constant value $k=8πG$ in general relativity, has a gravitational parameter $k$ that depends on the Rastall constant $α$. As an application, we perform a careful analysis of the effects of the theory on neutron stars using realistic equations of state (EoS) as input. Our results show that important differences on the profile of neutron stars are obtained within two representatives EoS.
Hemmnisse und Beschleuniger der Transformation im öffentlichen Sektor
Creators: name: Schnabel, Ulrich
name: Beinhauer, Wolfgang
name: Hübner, Veronika
name: Keppler, Marie
name: Wohllaib, Sophie
Publisher: name: Fraunhofer-Gesellschaft
Year: 2024
Subjects: Öffentliche Verwaltung
Öffentliche Hand
Digitalisierung
Organisationsentwicklung
Public Sector
Befragung

description: Die Autoren und Autorinnen der Kooperationsstudie des Fraunhofer Institut für Arbeitswirtschaft und Organisation IAO und der Beratung Capgemini Invent greifen ein dringliches Thema auf: Eindrucksvoll wird die Transformation von Institutionen des öffentlichen Sektors zu zukunftsfähigen Organisationen beschrieben. Ausgangspunkt ist die Untersuchung externer Umfeldfaktoren und deren Wirkung als Treiber der Transformation. Daran anknüpfend wird gezeigt, ob und wie der organisatorische Wandel gelingt. Dazu werden Zielbilder, Hemmnisse und Beschleuniger der Transformation zu zukunftsfähigen Arbeitsweisen und Organisationsformen, innovativer Informations- und Kommunikationstechnik, zeitgemäßen Führungspraktiken und innovationsförderlicher Organisationskultur identifiziert. Abschließend werden Handlungsempfehlungen für Führungskräfte auf Basis der Untersuchung und der Expertise von Fraunhofer IAO und Capgemini Invent gegeben. Die Untersuchung erfolgte mittels einer breit angelegten, systematischen Online-Befragung von 128 Führungskräften und 11 persönlichen Interviews auf der Basis eines semi-strukturierten Leitfades. Die Daten wurden von Mai bis September 2023 erhoben.
Varying Couplings in Electroweak Theory
Creators: name: Shaw, Douglas J.
name: Barrow, John D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the theory of Kimberly and Magueijo for the spacetime variation of the electroweak couplings in the unified Glashow-Salam-Weinberg model of the electroweak interaction to include quantum corrections. We derive the effective quantum-corrected dilaton evolution equations in the presence of a background cosmological matter density that is composed of weakly interacting and non-weakly-interacting non-relativistic dark-matter components.
description: 10 pages, no figures
ADN and AN solutions in hydrogen peroxide as green oxidiser for hypergolic propellants
Creators: name: Weiser, Volker
name: Hürttlen, Jürgen
name: Schaller, Uwe
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2015
Subjects: ADN (Ammonium dinitramide)
AN (Ammonium nitrate)
Hydrogen peroxide
Hypergolic propellants
Energetic materials

description: In scope to replace hydrazine based hypergolic rocket propulsion systems, new green fuels and oxidisers are required. In this paper an approach is investigated basing on ammonium dinitramide (ADN) and ammonium nitrate (AN) solutions in high concentrated hydrogen peroxide in combination with energetic ionic liquids (EILs) as fuels. Hydrogen peroxide was concentrated via partial condensation. Such systems provide a theoretical specific impulse up to 2500 N s/kg per mass respectively 3600 N s/dm3 per volume and should suite as liquid or gelled propellants. Fuels based on EILs are characterized by reduced safety and handling hazards due to the very low vapour pressure of the liquid salts. Such fuels combined with solutions of ADN/AN in high concentrated hydrogen peroxide (H2O2) enable low operation temperatures below -40 °C. Assisted by appropriate catalysts integrated into the fuel, effective hypergolic propellant systems can be achieved. Hypergolic lab scale ignition tests result in ignition delay times comparable to hypergolic systems in operation. Measurements of combustion temperatures agree well with thermodynamic calculations of the adiabatic combustion temperatures indicating a good accordance with the predicted specific impulse.
Consumer Preferences for Imported Kona Coffee in South India: A Latent Class Analysis
Creators: name: Krishnakumar, Jyotsna
name: Chan-Halbrendt, Catherine
name: Krishnakumar, Jyotsna
name: Chan-Halbrendt, Catherine
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: India
subject: US Coffee Export
subject: Kona Coffee
subject: Conjoint Choice Experiment
subject: Latent Class Analysis

description: Considering India as a potential export market for 100% Kona coffee, this study explores consumer preferences for imported, specialty, high-end Kona coffee in South India. Conjoint choice experiment with latent class analysis is used and results indicate that India offers an export market potential for Kona coffee, provided it caters to consumer preferences. Results show a significant preference for strong taste. The relative importance of price is lower than taste but majority are also adverse to higher prices. However,15% of the sample population does not care about price but does care about taste, indicating the possibility of a high-end niche market segment. Based on the results, marketing strategies and policy recommendations have been suggested.
SN 2017ivv: two years of evolution of a transitional Type II supernova
Creators: name: Gutiérrez, C. P.
name: Pastorello, A.
name: Jerkstrand, A.
name: Galbany, L.
name: Sullivan, M.
name: Anderson, J. P.
name: Taubenberger, S.
name: Kuncarayakti, H.
name: González-Gaitán, S.
name: Wiseman, P.
name: Inserra, C.
name: Fraser, M.
name: Maguire, K.
name: Smartt, S.
name: Müller-Bravo, T. E.
name: Arcavi, I.
name: Benetti, S.
name: Bersier, D.
name: Bose, S.
name: Bostroem, K. A.
name: Burke, J.
name: Chen, P.
name: Chen, T. -W.
name: Della Valle, M.
name: Dong, Subo
name: Gal-Yam, A.
name: Gromadzki, M.
name: Hiramatsu, D.
name: Holoien, T. W. -S.
name: Hosseinzadeh, G.
name: Howell, D. A.
name: Kankare, E.
name: Kochanek, C. S.
name: McCully, C.
name: Nicholl, M.
name: Pignata, G.
name: Prieto, J. L.
name: Shappee, B.
name: Taggart, K.
name: Tomasella, L.
name: Valenti, S.
name: Young, D. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the photometric and spectroscopic evolution of the Type II supernova (SN II) SN 2017ivv (also known as ASASSN-17qp). Located in an extremely faint galaxy (M$_r=-10.3$ mag), SN 2017ivv shows an unprecedented evolution during the two years of observations. At early times, the light curve shows a fast rise ($\sim6-8$ days) to a peak of ${\rm M}^{\rm max}_{g}= -17.84$ mag, followed by a very rapid decline of $7.94\pm0.48$ mag per 100 days in the $V-$band. The extensive photometric coverage at late phases shows that the radioactive tail has two slopes, one steeper than that expected from the decay of $^{56}$Co (between 100 and 350 days), and another slower (after 450 days), probably produced by an additional energy source. From the bolometric light curve, we estimated that the amount of ejected $^{56}$Ni is $\sim0.059\pm0.003$ M$\odot$. The nebular spectra of SN 2017ivv show a remarkable transformation that allows the evolution to be split into three phases: (1) H$α$ strong phase ($<200$ days); (2) H$α$ weak phase (between 200 and 350 days); and (3) H$α$ broad phase ($>500$ days). We find that the nebular analysis favours a binary progenitor and an asymmetric explosion. Finally, comparing the nebular spectra of SN 2017ivv to models suggests a progenitor with a zero-age main-sequence mass of 15 -- 17 \Msun.
description: Accepted for publication in MNRAS
FAIR-IMPACT National Roadshow Denmark: FAIR Principles in national and institutional data management policies in Denmark
Creators: name: Pittonet, Sara
name: Julin Kudsk, Gitte
name: Fink, Anne Sofie
name: Dennis, Richard
name: Buss, Mareike
name: Horton, Laurence
Publisher: name: Zenodo
Year: 2024

description: The FAIR-IMPACT National Roadshow series visited Denmark on 4 October 2024.

This hybrid event was hosted at the Danish e-Infrastructure Consortium (DeiC), University of Copenhagen and Copenhagen Business School, in Denmark.

The aim of this event was to present the FAIR principles in Danish national and institutional data management policies, as well as promote the outcomes and ongoing work of the FAIR-IMPACT project to the research community in Denmark.

Find more details on the event page here.
Jet propagation and the asymmetries of CSS radio sources
Creators: name: Jeyakumar, S.
name: Wiita, Paul J.
name: Saikia, D. J.
name: Hooda, Jagbir S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: As Compact Steep Spectrum radio sources have been shown to be more asymmetrical than larger sources of similar powers, there is a high probability that they interact with an asymmetric medium in the central regions of the host elliptical galaxy. We consider a simple analytical model of the propagation of radio jets through a reasonable asymmetric environment and show that they can yield the range of arm-length and luminosity asymmetries that have been observed. We then generalize this to allow for the effects of orientation, and quantify the substantial enhancements of the asymmetries that can be produced in this fashion. We present two-dimensional and three-dimensional simulations of jets propagating through multi-phase media and note that the results from the simulations are also broadly consistent with the observations.
description: 11 pages, 6 figures, 1 table, accepted for publication in A&A
Introduction to Quantum-Gravity Phenomenology
Creators: name: Amelino-Camelia, Giovanni
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: After a brief review of the first phase of development of Quantum-Gravity Phenomenology, I argue that this research line is now ready to enter a more advanced phase: while at first it was legitimate to resort to heuristic order-of-magnitude estimates, which were sufficient to establish that sensitivity to Planck-scale effects can be achieved, we should now rely on detailed analyses of some reference test theories. I illustrate this point in the specific example of studies of Planck-scale modifications of the energy/momentum dispersion relation, for which I consider two test theories. Both the photon-stability analyses and the Crab-nebula synchrotron-radiation analyses, which had raised high hopes of ``beyond-Plankian'' experimental bounds, turn out to be rather ineffective in constraining the two test theories. Examples of analyses which can provide constraints of rather wide applicability are the so-called ``time-of-flight analyses'', in the context of observations of gamma-ray bursts, and the analyses of the cosmic-ray spectrum near the GZK scale.
description: 46 pages, LaTex. Based on lectures given at the 40th Karpacz Winter School in Theoretical Physics
Perception of climate change and adaptations of cocoa producers in the Divo production area
Creators: name: Assi, Evelyne Marise
name: Kotaix, Jacques-Alain
name: Gogbé, Françoise
name: N'guessan, Pierre Walet
name: Guiraud, Brigitte
name: Coulibaly, klotioloma
name: N'dri, Norbert
name: Tahi, Mathias
Publisher: name: Zenodo
Year: 2023

description: Climate change is one of the major constraints that disrupts the technical route of cocoa production. To ensure the longevity of cocoa orchards in Côte d'Ivoire, the challenge for agronomists is to understand what perceptions producers have of this phenomenon and how are they adapting. To address these concerns, a study was initiated at Divo, a cocoa production area located in the south centre of Côte d'Ivoire and increasingly subject to climate change. The objective of this study was to determine through a survey, the perception of climate change of cocoa producers and the various adaptation measures developed by them in this region. The survey was preceded by the development of a questionnaire and the completion of a pre-survey to refine the survey sheet. It focused on three main areas of the Divo production area (Divo-Lakota; Divo-Hiré; Divo-Tiassalé), i.e. 27 villages and 252 producers.The results showed that 100% of the population surveyed is aware of the phenomenon of climate change. About 85% of growers observed climate change less than 5 years ago and 67.06% of them noticed the effects of climate change on their own. In addition, according to 51% of them, deforestation was named as the major cause of climate change, followed by intensive and shifting agriculture (29.71% of producers). The producers interviewed perceived the effect of climate change on the soil and on the cocoa trees through high mortalities among young cocoa trees, a drop in production and strong insect pest attacks on adult cocoa trees. As adaptation strategies practiced, only 3% of producers said that climatic disturbances led to changes in their farming practices. . These are mainly the modification of the depth of the planting holes, attention is placed on the choice of soil type (sandy clay), the densification of banana trees, the use of cassava as a shade tree, the use of improved plant material and crop diversification. In terms of the socio-economic impact of climate change on households, 81.53% of producers say they currently invest more resources to establish and maintain their plantations through the purchase of more agricultural inputs compared to previous practices.
Keywords: climate change, cocoa, perception, adaptations
Risk - An Opportunity or Threat for Entrepreneurial Farmers in the Global Food Market?
Creators: name: Shadbolt, Nicola M.
name: Olubode-Awosola, Femi
name: Gray, David I.
name: Dooley, Elizabeth
name: Shadbolt, Nicola M.
name: Olubode-Awosola, Femi
name: Gray, David I.
name: Dooley, Elizabeth
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: uncertainty
subject: farm management
subject: opportunities
subject: threats

description: Operating in a deregulated economy that provides minimal support to agriculture, New Zealand dairy farmers are exposed to considerable uncertainty. However, this uncertainty provides both opportunities and threats for New Zealand dairy farms and often it is the capacity of the farm manager to interpret and respond to external (and internal) information that determines the extent of the advantage or disadvantage that is eventually realized. The research question in this study is to determine whether the perceptions of risk (importance and likelihood) differ according to time horizon and according to whether the risk is viewed as an opportunity or a threat. Subsequent to this question is whether presenting farmer perceptions in a format that better illustrates and informs on the relativity between the sources of risk can enhance the capacity of farm managers to either avoid or exploit the threat and opportunity respectively. This paper reports on the development and application of a methodology to answer these questions. The methodology is then tested on a selected group of farmers with the results analyzed and presented.
description: www.ifama.org
A study of bright Southern Long Period Variables
Creators: name: Lebzelter, T.
name: Hinkle, K. H.
name: Wood, P. R.
name: Joyce, R. R.
name: Fekel, F. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present radial velocity curves of AGB variables that exhibit various kinds of anomalies: Semiregular variables (SRVs) with typical mira periods, SRVs exceeding the mira 2.5 mag amplitude limit, miras with secondary maxima in their light curves, and a SRV with a long secondary period. The stars with reliable Hipparcos parallaxes from this and from previous studies are plotted in a logP-$M_{K}$-diagram. Our objects nicely follow the logP-$M_{K}$-relations determined for the LMC. This allows the pulsation mode to be identified. While all miras fall on the fundamental mode sequence, the SRVs fall on both the first overtone and fundamental mode sequences. The SRVs on the fundamental mode sequence occur at both high and low luminosities, some of them being more luminous than larger amplitude miras. This demonstrates observationally that some parameter other than luminosity affects the stability of long period variables, probably mass. First overtone pulsators all show velocity amplitudes around 4 km/s. For the fundamental mode pulsators, the velocity amplitude shows a correlation with light amplitude. The two miras R Cen and R Nor, known for their double-peaked light curves, have velocity curves that are quite different. The R Nor velocity curve shows no evidence of the double peaks, meaning that the true pulsation period is the time between alternate minima or maxima. There is slight evidence for a double bump in the R Cen velocity curve. It is suggested that these stars are relatively massive (3-5 Msun).
description: 13 pages, accepted for publication in A&A
title: Mobilität/en und Mobilitätsgeschichte
Creators: name: Liebisch-Gümüş, Carolin
Publisher: name: ZZF - Leibniz-Zentrum für Zeithistorische Forschung: Docupedia-Zeitgeschichte
Year: 2024

description: Neu in einer aktualisierten Version 2.0: Bewegungsorientierte Themen liegen im Trend. Unter dem Begriff Mobilitäten/mobilities untersuchen Forscher:innen die Zusammenhänge zwischen verschiedenen Formen räumlicher Bewegung (von Alpintourismus bis Zwangsmigration) sowie zwischen Bewegung und Stillstand. Das Unterwegssein samt seinen Bedingungen und Folgen avanciert zum eigenständigen historischen Forschungsgegenstand. Der Beitrag stellt Mobilitätsgeschichte als heterogenen Querschnittsbereich vor. Dieser erfasst mehrere Forschungsfelder wie die Verkehrs-, Umwelt-, Migrations-, Tourismus- und Globalgeschichte. Im Beitrag werden theoretisch-methodische Überlegungen aus den interdisziplinären Mobility Studies rekapituliert und Schlaglichter auf aktuelle Forschungsthemen, Potenziale und Grenzen der Mobilitätsgeschichte geworfen.
Hedonic Analysis of Sustainable Food Products
Creators: name: Satimanon, Thasanee
name: Weatherspoon, Dave D.
name: Satimanon, Thasanee
name: Weatherspoon, Dave D.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: hedonic
subject: sustainable
subject: sustainability
subject: eggs
subject: free-range
subject: cage-free

description: This study aims to determine price premiums of sustainable attributes for fresh eggs by using hedonic analysis. The sustainable attributes defined include welfare-managed egg production and recyclable packaging attributes. Welfare-managed eggs have a price premium equal to 3.57 cents per egg; while the sustainable packaging variable was not found to be significant. The strategies for egg manufactures and retailers include offering organic or welfare-managed eggs independently until consumers perceive these attributes as being different, and using sustainable packaging for each specific region of the U.S. since each state has different laws and opportunities to recycle paper, plastic and Styrofoam products.
description: www.ifama.org