cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Differing U.S. and European Perspectives on GMOs: Political, Economic and Cultural Issues
Creators: name: Runge, C. Ford
name: Bagnara, Gian Luca
name: Jackson, Lee Ann
name: Runge, C. Ford
name: Bagnara, Gian Luca
name: Jackson, Lee Ann
Publisher: name: Unknown
Year: 2001
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: biotechnology
subject: culture
subject: harmonization
subject: labelling
subject: trade

description: This paper provides an overview of the historical and cultural factors that have contributed to divergent U.S. and European views on GMOs, and to resulting different national regulatory approaches for these products, specifically labelling policy. Within the context of the international trading system, these national policy choices will have impacts that will spill over national borders. Dialogue may be difficult to achieve, given widely divergent views concerning GMOs; however, without dialogue potential global social benefits of policy harmonization will be forfeited.
Crystal Structure and Elementary Properties of NaxCoO2 (x = 0.32, 0.5, 0.6, 0.75, and 0.92) in the Three-Layer NaCoO2 Family
Creators: name: Viciu, L.
name: Bos, J. W. G.
name: Zandbergen, H. W.
name: Huang, Q.
name: Foo, M. L.
name: Ishiwata, S.
name: Ramirez, A. P.
name: Lee, M.
name: Ong, N. P.
name: Cava, R. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The crystal structures of the NaxCoO2 phases based on three-layer NaCoO2, with x=0.32, x=0.51, x=0.60, x=0.75 and x=0.92, determined by powder neutron diffraction, are reported. The structures have triangular CoO2 layers interleaved by sodium ions, and evolve with variation in Na content in a more complex way than has been observed in the two-layer NaxCoO2 system. The highest and lowest Na containing phases studied (x=0.92 and x=0.32) are trigonal, with three CoO2 layers per cell and octahedral Na ion coordination. The intermediate compositions have monoclinic structures. The x=0.75 compound has one CoO2 layer per cell, with Na in octahedral coordination and an incommensurate superlattice. The x=0.6 and x=0.5 phases are also single-layer, but the Na is found in trigonal prismatic coordination. The magnetic behavior of the phases is similar to that observed in the two-layer system. Both the susceptibility and the electronic contribution to the specific heat are largest for x=0.6.
description: 24 pages, 14 figures, submitted to Phys.Rev. B
Identifying National and International Vacuums Potentially Impacting NAFTA and Indigenous Peoples
Creators: name: Phillips, Valerie J.
name: Phillips, Valerie J.
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: FTAA
subject: indigenous
subject: investor
subject: NAFTA
subject: nation-state

description: The North American Free Trade Agreement (NAFTA) was made among three nation-states, Canada, the United States, and Mexico. Each of these nation-states has indigenous populations within its borders. Each has chosen different legal mechanisms for interacting with indigenous peoples. For example, the United States has an extensive web of treaties with the tribes within its borders while Canada, in contrast, has relatively few. All three nation-states have grappled with armed conflicts with indigenous peoples well into the 20th century. Indigenous peoples within each have long social, cultural, economic, and political histories which cross the borders of these countries. Within the provisions of NAFTA, each nation-state reserved the right to deny investors rights or preferences provided to "aboriginal peoples", "socially or economically disadvantaged minorities", or "socially or economically disadvantaged groups" in from two to five designated areas. All three approaches nevertheless leave substantial national and international legal vacuums that necessarily impact the implementation of NAFTA as well as the economic interests of indigenous peoples. This paper identifies some of those vacuums, considers their potential impacts and their relationship to negotiations on a Free Trade of the Americas (FTAA) agreement, and discusses possible remedies.
Robust Control of An Aerial Manipulator Based on A Variable Inertia Parameters Model
Creators: name: Zhang, Guangyu
name: He, Yuqing
name: Dai, Bo
name: Gu, Feng
name: Han, Jianda
name: Liu, Guangjun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Aerial manipulator, which is composed of an UAV (Unmanned Aerial Vehicle) and a multi-link manipulator and can perform aerial manipulation, has shown great potential of applications. However, dynamic coupling between the UAV and the manipulator makes it difficult to control the aerial manipulator with high performance. In this paper, system modeling and control problem of the aerial manipulator are studied. Firstly, an UAV dynamic model is proposed with consideration of the dynamic coupling from an attached manipulator, which is treated as disturbance for the UAV. In the dynamic model, the disturbance is affected by the variable inertia parameters of the aerial manipulator system. Then, based on the proposed dynamic model, a disturbance compensation robust $H_{\infty}$ controller is designed to stabilize flight of the UAV while the manipulator is in operation. Finally, experiments are conducted and the experimental results demonstrate the feasibility and validity of the proposed control scheme.
Dissecting the Strong-lensing Galaxy Cluster MS 0440.5+0204. I. The Mass Density Profile
Creators: name: Verdugo, Tomás
name: Carrasco, Eleazar R.
name: Foëx, Gael
name: Motta, Verónica
name: Gomez, Percy L.
name: Limousin, Marceau
name: Magaña, Juan
name: de Diego, José A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a parametric strong lensing modeling of the galaxy cluster MS\,0440.5+0204 (located at $z$ = 0.19). We have performed a strong lensing mass reconstruction of the cluster using three different models. The first model uses the image positions of four multiple imaged systems (providing 26 constraints). The second one combines strong lensing constraints with dynamical information (velocity dispersion) of the cluster. The third one uses the mass calculated from weak lensing as an additional constraint. Our three models reproduce equally well the image positions of the arcs, with a root-mean-square image equal to $\approx$0.5$\arcsec$. However, in the third model, the inclusion of the velocity dispersion and the weak-lensing mass allows us to obtain better constraints in the scale radius and the line-of-sight velocity dispersion of the mass profile. For this model, we obtain $r_s$ = 132$^{+30}_{-32}$ kpc, $σ_s$ = 1203$^{+46}_{-47}$ km s$^{-1}$, M$_{200}$ = 3.1$^{+0.6}_{-0.6}$ $\times10^{14}$\,M$_{\odot}$, and a high concentration, $c_{200}$ = 9.9$^{+2.2}_{-1.4}$. Finally, we used our derived mass profile to calculate the mass up to 1.5 Mpc. We compare it with X-ray estimates previously reported, finding a good agreement.
description: To be published in The Astrophysical Journal
Healthcare Voice AI Assistants: Factors Influencing Trust and Intention to Use
Creators: name: Zhan, Xiao
name: Abdi, Noura
name: Seymour, William
name: Such, Jose
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: AI assistants such as Alexa, Google Assistant, and Siri, are making their way into the healthcare sector, offering a convenient way for users to access different healthcare services. Trust is a vital factor in the uptake of healthcare services, but the factors affecting trust in voice assistants used for healthcare are under-explored and this specialist domain introduces additional requirements. This study explores the effects of different functional, personal, and risk factors on trust in and adoption of healthcare voice AI assistants (HVAs), generating a partial least squares structural model from a survey of 300 voice assistant users. Our results indicate that trust in HVAs can be significantly explained by functional factors (usefulness, content credibility, quality of service relative to a healthcare professional), together with security, and privacy risks and personal stance in technology. We also discuss differences in terms of trust between HVAs and general-purpose voice assistants as well as implications that are unique to HVAs.
description: 37 pages. This is a preprint of the paper accepted for the 27th ACM Conference on Computer-Supported Cooperative Work and Social Computing (CSCW'24)
Dumping - One of Those Economic Myths
Creators: name: Kerr, William A.
name: Kerr, William A.
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: dumping
subject: international predation
subject: price discrimination
subject: protectionist

description: Dumping is one of the most poorly understood and contentious issues in trade policy. The primary reason is that the agreed definitions of dumping are not based on a solid economic foundation. This allows antidumping measures to be used for protectionist ends and to harass trade partners. While putting antidumping measures on a sounder economic foundation in international law may be difficult given their popularity with politicians, no progress can be made until economists provide a theoretically sustainable definition of dumping and devise a set of transparent criteria for determining if dumping is occurring. This paper explains the difficulties with the current definitions of dumping and outlines an agenda for future progress.
The Anatomy of the EU-US WTO Banana Trade Dispute
Creators: name: Read, Robert
name: Read, Robert
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: banana trade
subject: banana dispute
subject: EU trade dispute
subject: WTO

description: This paper provides an overview of the banana dispute between the EU and the United States at the WTO which was finally resolved in July 2001. The paper outlines the origins of the dispute in the EU's legal obligations to its preferred suppliers, primarily former colonies, and the subsequent evolution of the EU banana trade regime. The Single European Act and subsequent complaints to the GATT and the WTO have necessitated successive reforms of the EU banana regime, culminating in a landmark WTO Panel decision in 1997. These successive regimes are summarised, along with the GATT and WTO complaints and the WTO Panel findings. The resolution of the trade policy issues concerning bananas opens the way for the serious competition issues to be more readily addressed.
Strong correlations between text quality and complex networks features
Creators: name: Antiqueira, Lucas
name: Nunes, Maria das Gracas V.
name: Oliveira, Osvaldo N.
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Concepts of complex networks have been used to obtain metrics that were correlated to text quality established by scores assigned by human judges. Texts produced by high-school students in Portuguese were represented as scale-free networks (word adjacency model), from which typical network features such as the in/outdegree, clustering coefficient and shortest path were obtained. Another metric was derived from the dynamics of the network growth, based on the variation of the number of connected components. The scores assigned by the human judges according to three text quality criteria (coherence and cohesion, adherence to standard writing conventions and theme adequacy/development) were correlated with the network measurements. Text quality for all three criteria was found to decrease with increasing average values of outdegrees, clustering coefficient and deviation from the dynamics of network growth. Among the criteria employed, cohesion and coherence showed the strongest correlation, which probably indicates that the network measurements are able to capture how the text is developed in terms of the concepts represented by the nodes in the networks. Though based on a particular set of texts and specific language, the results presented here point to potential applications in other instances of text analysis.
description: 8 pages, 8 figures
Two-photon atomic level widths at finite temperatures
Creators: name: Zalialiutdinov, T.
name: Anikin, A.
name: Solovyev, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The thermal two-photon level broadening of the excited energy levels in the hydrogen and H-like helium is evaluated via the imaginary part of thermal two-loop self-energy correction for bound electron. All the derivations are presented in the framework of rigorous quantum electrodynamic theory at finite temperatures and are applicable for the H-like ions. On this basis, we found a contribution to the level broadening induced by the blackbody radiation which is fundamentally different from the usual line broadening caused by the stimulated two-photon decay and the Raman scattering of thermal photons. Numerical calculations of the two-loop thermal correction to the two-photon width for the $2s$ state in hydrogen and singly ionized helium atoms show that the effect could significantly exceed the higher-order relativistic and radiative QED corrections commonly included in the calculations. In addition, the thermal two-loop self-energy correction significantly exceeds the "ordinary" stimulated one-photon depopulation rate at the relevant laboratory temperatures. In this work, detailed analysis and the corresponding comparison of the effect with the existing laboratory measurements in H-like ions are carried out.
Theory of Moment Propagation for Quantum Dynamics in Single-Particle Description
Creators: name: Boyer, Nicholas
name: Shepard, Christopher
name: Zhou, Ruiyi
name: Xu, Jianhang
name: Kanai, Yosuke
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a novel theoretical formulation for performing quantum dynamics in terms of moments within the single-particle description. By expressing the quantum dynamics in terms of increasing orders of moments, instead of single-particle wave functions as generally done in time-dependent density functional theory, we describe an approach for reducing the high computational cost of simulating the quantum dynamics. The equation of motion is given for the moments by deriving analytical expressions for the first-order and second-order time derivatives of the moments, and a numerical scheme is developed for performing quantum dynamics by expanding the moments in the Taylor series as done in classical molecular dynamics simulation. We propose a few numerical approaches using this theoretical formalism on a simple one-dimensional model system, for which an analytically exact solution can be derived. Application of the approaches to an anharmonic system is also discussed to illustrate their generality. We also discuss the use of an artificial neural network model to circumvent the numerical evaluation of the second-order time derivatives of the moments, as analogously done in the context of classical molecular dynamics simulations.
High mass diffraction at the LHC
Creators: name: Royon, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use a Monte Carlo implementation of recently developped models of exclusive diffractive W, top, Higgs and stop productions to assess the sensitivity of the LHC experiments.
description: Proceedings of the DIS 2005 conference, Madison
EOSC-hub D12.1 Procurement requirements and demand assessment
Creators: name: Andreozzi, Sergio
name: Goodson, Hilary
name: Jones, Bob
name: Bens, Anita
name: Veys, Christophe
name: Williams, Michelle
name: Matthews, Phil
name: Wustemberg, Daniel
name: Mallmann, Daniel
name: Koers, Hylke
name: Giuliano, Angele
name: Pantea, Annamari Magri
Publisher: name: Zenodo
Year: 2019

description: This document presents a demand-side market research to understand the need for and level of demand of digital services for research, the manner in which such needs and demand are currently satisfied, the challenges presently being faced in respect of analysis workflows, data management and related infrastructure and services. The document also describes a business model analysis in the EOSC context, with a specific focus on proposing mechanisms for acquiring digital services in a business-to-business type of relationship. The document closes with a number of key recommendations for different types of stakeholders and draws the next steps for the work.
The Impact of CAP and EU Cohesion Support on Growth and Convergence of the Eastern Slovenia Region in the Period 2007-2013
Creators: name: Juvancic, Luka
name: Kuhar, Ales
name: Sila, Urban
name: Erjavec, Emil
name: Juvancic, Luka
name: Kuhar, Ales
name: Sila, Urban
name: Erjavec, Emil
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: regional input-output model
subject: Slovenia
subject: Common Agricultural Policy
subject: EU cohesion policy

description: The paper investigates economic performance of the Eastern Slovenia region in the changed economic and policy environment after the accession to the EU. The likely impacts of public expenditure in the field of cohesion and agricultural policy in the period of the Community financial perspective 2007-2013 are analysed by the regional Input/Output model estimated with modified GRIT methodology. Results of the impact analysis carried out by application of various policy scenarios suggest that: (i) the analysed funds can significantly contribute to the overall output growth of the regional economy; (ii) EU budgetary inflows contribute to economic convergence of the region; (iii) differences between the projected impacts primarily depend on the regional division of Slovenia at the NUTS 2 level; (iv) favourable prospects can be impaired by various limiting factors. Concerning the impacts of CAP expenditure, the paper argues against the popular opinion about its low redistributive and short-term effects.
Quadrupole absorption rate and orbital angular momentum transfer for atoms in optical vortices
Creators: name: Bougouffa, Smail
name: Babiker, Mohamed
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent experiments involving the interaction of optical vortices with atoms in quadrupole transitions have been shown to be accompanied by the exchange of orbital angular momentum (OAM) between the electronic states of the atom and the optical vortex field. Earlier work by both theory and experiment had ruled out the transfer of a vortex OAM to the electronic degrees of freedom in an electric dipole atomic transition and it has been confirmed that the lowest multipolar order involving an OAM transfer to the electronic motion is indeed the electric quadrupole. Hitherto, the quadrupole transition involving optical vortices has not been quantified and we have thus set out to evaluate the absorption rate accompanied by an OAM transfer with reference to the $6^2S_{1/2}\rightarrow 5^2D_{5/2}$ in Cs when caesium atoms are subject to the field of a linearly polarized optical vortex. Our results assuming typical experimentally accessible parameters indicate that the absorption rate for moderate light intensities is smaller than the quadrupole spontaneous emission rate, but should still be within the measurement capabilities of modern spectroscopic techniques.
description: 6 pages, 3 figures
Extrinsic doping in group IV hexagonal-diamond type crystals
Creators: name: Amato, Michele
name: Kaewmaraya, Thanayut
name: Zobelli, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Over the last few years, group IV hexagonal-diamond type crystals have acquired great attention in semiconductor physics thanks to the appearance of novel and very effective growth methods. However, many questions remain unaddressed on their extrinsic doping capability and on how it compares to those of diamond-like structures. This point is here investigated through numerical simulations conducted in the framework of the Density Functional Theory (DFT). The comparative analysis for group III and V dopant atoms shows that: i) in diamond-type crystals the bulk sites symmetry ($T_d$) is preserved by doping while in hexagonal crystals the impurity site moves towards a higher ($T_d$) or lower ($C_{3v}$) symmetry configuration dependently on the valence of the dopant atoms; ii) for Si and Ge, group III impurities can be more easily introduced in the hexagonal-diamond phase, whose local $C_{3v}$ symmetry better accommodates the three-fold coordination of the impurity, while n-type impurities do not reveal any marked phase preference; iii) for C, both n and p dopants are more stable in the hexagonal-diamond structure than in the the cubic one, but this tendency is much more pronounced for n-type impurities.
Wigner crystallization in Na(3)Cu(2)O(4) and Na(8)Cu(5)O(10) chain compounds
Creators: name: Horsch, P.
name: Sofin, M.
name: Mayr, M.
name: Jansen, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the synthesis of novel edge-sharing chain systems Na(3)Cu(2)O(4) and Na(8)Cu(5)O(10), which form insulating states with commensurate charge order. We identify these systems as one-dimensional Wigner lattices, where the charge order is determined by long-range Coulomb interaction and the number of holes in the d-shell of Cu. Our interpretation is supported by X-ray structure data as well as by an analysis of magnetic susceptibility and specific heat data. Remarkably, due to large second neighbor Cu-Cu hopping, these systems allow for a distinction between the (classical) Wigner lattice and the 4k_F charge-density wave of quantum mechanical origin.
description: 4 pages, 4 figures
Ten Years After - Welfare Effects of the Application of the CAP in Austria, Finland and Sweden
Creators: name: Niemi, Jyrki S.
name: Fahlbeck, Erik
name: Hofreither, Markus F.
name: Niemi, Jyrki S.
name: Fahlbeck, Erik
name: Hofreither, Markus F.
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: integration
subject: EU
subject: CAP
subject: Austria
subject: Finland
subject: Sweden
subject: welfare analysis

description: Ten years ago, Austria, Finland, and Sweden joined the EU. The application of the Common Agricultural Policy (CAP) caused major repercussions on the agricultural sectors of the entering countries. This article analyses the welfare effects of accession to the EU on the agricultural markets in Austria, Finland and Sweden in a simple supply and demand framework, which is kept strictly identical across all three countries. The quantitative results of the study are derived by using standard partial equilibrium comparative static analysis in the Marshallian economic surplus framework. Using this method, the welfare effects are calculated for eight major cereal and livestock commodities produced in Austria, Finland, and Sweden by comparing the evolution of the markets with and without entry into the EU. The results of the analysis suggest that consumers have gained from accession and producers, on the other hand, have incurred welfare losses from changing market conditions, which however have been eased by rising budgetary support.
P-wave Pentaquark and its Decay in the Quark Model with Instanton Induced Interaction
Creators: name: Shinozaki, Tetsuya
name: Oka, Makoto
name: Takeuchi, Sachiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: P-wave pentaquarks with strangeness +1, I=0 and J^P=1/2^+ are studied in the non-relativistic quark model with instanton induced interaction (III). We present their mass splittings and orbital-spin-isospin-color structures. It is found that decompositions of the wave functions are sensitive to III, while the mass splittings are insensitive. The decay of the lowest energy pentaquark, Θ^+, is found to be suppressed when the contribution of III is increased. Its wave function is dominated by Jaffe-Wilczek-type configuration at large III.
description: 9 pages, 5 figures
Quantum automata, braid group and link polynomials
Creators: name: Garnerone, Silvano
name: Marzuoli, Annalisa
name: Rasetti, Mario
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin--network quantum simulator model, which essentially encodes the (quantum deformed) SU(2) Racah--Wigner tensor algebra, is particularly suitable to address problems arising in low dimensional topology and group theory. In this combinatorial framework we implement families of finite--states and discrete--time quantum automata capable of accepting the language generated by the braid group, and whose transition amplitudes are colored Jones polynomials. The automaton calculation of the polynomial of (the plat closure of) a link L on 2N strands at any fixed root of unity is shown to be bounded from above by a linear function of the number of crossings of the link, on the one hand, and polynomially bounded in terms of the braid index 2N, on the other. The growth rate of the time complexity function in terms of the integer k appearing in the root of unity q can be estimated to be (polynomially) bounded by resorting to the field theoretical background given by the Chern-Simons theory.
description: Latex, 36 pages, 11 figures
Electronic structure and spontaneous internal field around non-magnetic impurities in spin-triplet chiral p-wave superconductors
Creators: name: Takigawa, Mitsuaki
name: Ichioka, Masanori
name: Kuroki, Kazuhiko
name: Tanaka, Yukio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The electronic structure around an impurity in spin triplet p-wave superconductors is studied by the Bogoliubov-de Gennes theory on a tight-binding model, where we have chosen $\sin{p_x}{+}{\rm i}\sin{p_y}$-wave or $\sin{(p_x+p_y)}{+}{\rm i}\sin{({-}p_x{+}p_y)}$-wave states which are considered to be candidates for the pairing state in Sr$_{2}$RuO$_{4}$. We calculate the spontaneous current and the local density of states around the impurity and discuss the difference between the two types of pairing. We propose that it is possible to discriminate the two pairing states by studying the spatial dependence of the magnetic field around a pair of impurities.
description: 4 pages, 4 figures
Dynamics of massive matter disappearance on the brane
Creators: name: Maziashvili, Michael
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Time evolution of the probability of quasilocalized massive modes decay trough the tunneling into an extra dimension is analyzed in the Randall-Sundrum braneworld model.
description: 5 pages, 1 figure, version to appear in Phys. Lett. B
Valorisation of Meat Production Oriented on 'Superior' Quality: A Case Study of Belgian Farmers' Motivations
Creators: name: Bosmans, Werner
name: Verbeke, Wim
name: Van Gysel, Laure
name: Bosmans, Werner
name: Verbeke, Wim
name: Van Gysel, Laure
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: micro analyses of farm firms
subject: agricultural markets and marketing

description: Quality beef and pork production becomes more and more important for both producers and consumers. We first establish an integrated approach of the different attributes that producers and consumers attach to 'superior' quality. This results in the clustering of producers in a traditional and conscious group which reveals relevant differences in attitudes but not in valorisation. On the contrary, the clustering of producers in function of their adherence to a label gives clear differences in labour income. Especially specific labels generate higher revenue because they seem to succeed to communicate credence attributes of 'superior' quality to consumers.
Design and development of simulation/game software : implications for higher education
Creators: name: Warren, Deborah Vivian
Publisher: name: University of British Columbia
Year: 2009

description: Online education is not yet utilizing the interactive potential of computer technology. In the future, higher education faculty may collaborate with commercial game designers to develop simulation/game software. This study analyzes the potential for disjunctions between these two groups of designers. Twenty-two designers of home entertainment computer games were surveyed and interviewed about the prospect of simulation/game software to be developed for use in online education. Specifically, their perspectives were probed with respect to three dimensions: a) designing for open exploration of a specific closure (winners and losers), b) relative commitment to objective or subjective representations of knowledge, and c) preference for pre-planning or a tolerance of the iterative nature of software development. The survey results indicated a preference of game designers to design for a specific closure (with a final determination of winners and losers) rather than an open exploration. A high commitment to representing objective knowledge was also indicated. Interview responses indicated a high tolerance for the iterative nature of software development. The analysis emphasized a disjunction/overlap of an academic culture that elevates critical thinking and a consumer entertainment culture that elevates curiosity. The use of computer simulation games may be most supportive of learning, in a culture than elevates the curiosity above critical thinking, and thus better serve the democratization of knowledge where 'everyone is invited to the knowledge party'. Such an implementation would be a divergence from the typical approach in higher education, where knowledgeparticipants are required to join a 'members-only' club. Future researchers may wish to profile the curiosity of learners and specifically design for this dimension.
Two-bands effect on the superconducting fluctuating diamagnetism in MgB₂
Creators: name: Romano', L.
name: Lascialfari, A.
name: Rigamonti, A.
name: Zucca, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The field dependence of the magnetization above the transition temperature Tc in MgB₂ is shown to evidence a diamagnetic contribution consistent with superconducting fluctuations reflecting both the σ and π bands. In particular, the upturn field Hup in the magnetization curve, related to the incipient effect of the magnetic field in quenching the fluctuating pairs, displays a double structure, in correspondence to two correlation lengths. The experimental findings are satisfactorily described by the extension to the diamagnetism of a recent theory for paraconductivity, in the framework of a zero-dimensional model for the fluctuating superconducting droplets above Tc.
Electrophoresis of colloidal dispersions in the low-salt regime
Creators: name: Lobaskin, Vladimir
name: Duenweg, Burkhard
name: Medebach, Martin
name: Palberg, Thomas
name: Holm, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the electrophoretic mobility of spherical charged colloids in a low-salt suspension as a function of the colloidal concentration. Using an effective particle charge and a reduced screening parameter, we map the data for systems with different particle charges and sizes, including numerical simulation data with full electrostatics and hydrodynamics and experimental data for latex dispersions, on a single master curve. We observe two different volume fraction-dependent regimes for the electrophoretic mobility that can be explained in terms of the static properties of the ionic double layer.
description: Substantially revised version
Spinney: post-processing of first-principles calculations of point defects in semiconductors with Python
Creators: name: Arrigoni, Marco
name: Madsen, Georg K. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Understanding and predicting the thermodynamic properties of point defects in semiconductors and insulators would greatly aid in the design of novel materials and allow tuning the properties of existing ones. As a matter of fact, first-principles calculations based on density functional theory (DFT) and the supercell approach have become a standard tool for the study of point defects in solids. However, in the dilute limit, of most interest for the design of novel semiconductor materials, the raw DFT calculations require an extensive post-processing. Spinney is an open-source Python package developed with the aim of processing first-principles calculations to obtain several quantities of interest, such as the chemical potential limits that assure the thermodynamic stability of the defectladen system, defect charge transition levels, defect formation energies, including electrostatic corrections for finite-size effects, and defect and carrier concentrations. In this paper we demonstrate the capabilities of the Spinney code using c-BN, Mg-doped GaN, TiO2 and ZnO as examples.
Classical Horizontal Inequities in the Provision of Agricultural Income Support
Creators: name: Allanson, Paul
name: Allanson, Paul
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agricultural and Food Policy
subject: farm income support
subject: horizontal inequity

description: This paper explores the redistributive effect of classical horizontal inequities induced by agricultural support policy. Within farm type horizontal inequity (HI) is associated with differences in the level of support received by farms of a given type and level of pre-support income, whereas between farm type HI arises from systematic differences in support levels between commodity regimes. The overall redistributive effect of HI in Scottish agriculture is shown to be substantial, though systematic discrimination between farm types proves not to be the major cause. The imperfect targeting of support revealed by the empirical findings has implications for the design of policy.
Unraveling hadron structure with generalized parton distributions
Creators: name: Belitsky, A. V.
name: Radyushkin, A. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The generalized parton distributions, introduced nearly a decade ago, have emerged as a universal tool to describe hadrons in terms of quark and gluonic degrees of freedom. They combine the features of form factors, parton densities and distribution amplitudes--the functions used for a long time in studies of hadronic structure. Generalized parton distributions are analogous to the phase-space Wigner quasi-probability function of non-relativistic quantum mechanics which encodes full information on a quantum-mechanical system. We give an extensive review of main achievements in the development of this formalism. We discuss physical interpretation and basic properties of generalized parton distributions, their modeling and QCD evolution in the leading and next-to-leading orders. We describe how these functions enter a wide class of exclusive reactions, such as electro- and photo-production of photons, lepton pairs, or mesons. The theory of these processes requires and implies full control over diverse corrections and thus we outline the progress in handling higher-order and higher-twist effects. We catalogue corresponding results and present diverse techniques for their derivations. Subsequently, we address observables that are sensitive to different characteristics of the nucleon structure in terms of generalized parton distributions. The ultimate goal of the GPD approach is to provide a three-dimensional spatial picture of the nucleon, direct measurement of the quark orbital angular momentum, and various inter- and multi-parton correlations.
description: 370 pages, 62 figures; Dedicated to Anatoly V. Efremov on occasion of his 70th anniversary
Universality at the edge of the spectrum for unitary, orthogonal and symplectic ensembles of random matrices
Creators: name: Deift, Percy
name: Gioev, Dimitri
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 15A52

description: We prove universality at the edge of the spectrum for unitary (beta=2), orthogonal (beta=1) and symplectic (beta=4) ensembles of random matrices in the scaling limit for a class of weights w(x)=exp(-V(x)) where V is a polynomial, V(x)=kappa_{2m}x^{2m}+..., kappa_{2m}>0. The precise statement of our results is given in Theorem 1.1 and Corollaries 1.2, 1.3 below. For a proof of universality in the bulk of the spectrum, for the same class of weights, for unitary ensembles see [DKMVZ2], and for orthogonal and symplectic ensembles see [DG]. Our starting point in the unitary case is [DKMVZ2], and for the orthogonal and symplectic cases we rely on our recent work [DG], which in turn depends on the earlier work of Widom [W] and Tracy and Widom [TW2]. As in [DG], the uniform Plancherel--Rotach type asymptotics for the orthogonal polynomials found in [DKMVZ2] plays a central role. The formulae in [W] express the correlation kernels for beta=1 and 4 as a sum of a Christoffel--Darboux (CD) term, as in the case beta=2, together with a correction term. In the bulk scaling limit [DG], the correction term is of lower order and does not contribute to the limiting form of the correlation kernel. By contrast, in the edge scaling limit considered here, the CD term and the correction term contribute to the same order: this leads to additional technical difficulties over and above [DG].
description: 36 pages
Development, Testing and Application of ACRE: An Agro-Economic Production Model on Regional Level
Creators: name: Henseler, Martin
name: Wirsig, Alexander
name: Krimly, Tatjana
name: Henseler, Martin
name: Wirsig, Alexander
name: Krimly, Tatjana
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: mathematical programming
subject: variant-activity
subject: regional model
subject: agricultural production model
subject: interdisciplinary projects

description: ACRE is an Agro-eConomic model for agricultural pRoduction on rEgional level. Based on an extension of Positive Mathematical Programming (PMP) this model was developed as a decision tool for politics with respect to questions of global change scenarios. The validity of the theoretical approach as well as the algorithms has been tested by calculations with empirical data. Currently, ACRE is applied in large interdisciplinary projects. This paper introduces the development of ACRE, from the theoretical framework to testing its validity and current application.
On the Dynamics of Finite-Gap Solutions in Classical String Theory
Creators: name: Dorey, Nick
name: Vicedo, Benoit
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study the dynamics of finite-gap solutions in classical string theory on R x S^3. Each solution is characterised by a spectral curve, Σ, of genus g and a divisor, γ, of degree g on the curve. We present a complete reconstruction of the general solution and identify the corresponding moduli-space, M^(2g)_R, as a real symplectic manifold of dimension 2g. The dynamics of the general solution is shown to be equivalent to a specific Hamiltonian integrable system with phase-space M^(2g)_R. The resulting description resembles the free motion of a rigid string on the Jacobian torus J(Σ). Interestingly, the canonically-normalised action variables of the integrable system are identified with certain filling fractions which play an important role in the context of the AdS/CFT correspondence.
description: 64 Pages, 5 Figures; typos corrected and references added
Symmetries and reversing symmetries of polynomial automorphisms of the plane
Creators: name: Baake, Michael
name: Roberts, John A. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37E30, 20E06

description: The polynomial automorphisms of the affine plane over a field K form a group which has the structure of an amalgamated free product. This well-known algebraic structure can be used to determine some key results about the symmetry and reversing symmetry groups of a given polynomial automorphism.
description: 27 pages, AMS-Latex
Symplectic Q-functions
Creators: name: Okada, Soichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05 (primary), 05A15, 05E15 (secondary)

description: Symplectic $Q$-functions are a symplectic analogue of Schur $Q$-functions and defined as the $t=-1$ specialization of Hall--Littlewood functions associated with the root system of type $C$. In this paper we prove that symplectic $Q$-functions share many of the properties of Schur $Q$-functions, such as a tableau description and a Pieri-type rule. And we present some positivity conjectures, including the positivity conjecture of structure constants for symplectic $P$-functions. We conclude by giving a tableau description of factorial symplectic $Q$-functions.
description: 38 pages
Multifunctional Policy Measures for Multifunctional Agriculture
Creators: name: Arovuori, Kyösti
name: Kola, Jukka
name: Arovuori, Kyösti
name: Kola, Jukka
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agricultural and Food Policy
subject: multifunctional agriculture
subject: agricultural policies
subject: policy Delphi

description: While agricultural policies in Europe place ever greater emphasis on the importance of agricultures' multiple roles, it is difficult to find policy measures designed specially for multifunctionality. The aim of our study is to identify actual and preferred policy measures to improve or to maintain the multifunctional role of agriculture, or both. We used the applied policy Delphi method to interview 24 Finnish experts in order to map a preferred set of policy measures to truly enhance multifunctionality. The results indicate that Finnish experts prefer targeted measures based on different national, regional and local agricultural conditions, but may be unaware of the costs these targeted policies might cause.
Theoretical Description of K-Isomers
Creators: name: Sun, Yang
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A proper treatment of K-mixing is the key to understanding K-isomers. Here, we present a method based on the projected shell model. This method differs from the usual description of multi-quasiparticle states by introducing a transformation to the laboratory frame and a subsequent configuration mixing in that frame. It allows a quantitative study on the degree of K-violation through direct calculations of electromagnetic transitions.
description: 5 pages, 1 figure, Proceedings of the Isomer Workshop, Sept 4, 2005, University of Notre Dame
Dairy Farm Size Distribution in East and West: Evolution and Sensitivity to Structural and Policy Variables: Case-Studies of the Netherlands, Germany, Poland and Hungary
Creators: name: Jongeneel, Roelof A.
name: Longworth, Natasha
name: Huettel, Silke
name: Jongeneel, Roelof A.
name: Longworth, Natasha
name: Huettel, Silke
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: farm size structure
subject: dairy
subject: milk quotas
subject: policy
subject: maximum entropy

description: This paper analyses the dynamics in the farm size distribution for The Netherlands, Germany, Poland and Hungary. A (non-)stationary Markov model approach is used. The transition probabilities are explained by a set of exogenous (policy) variables. The models are estimated using an information theoretical approach, including non-sample (prior) information. The models can be used to simulate the impact of alternative dairy policies on the dairy sector structure. For all countries there is an autonomous decline in farm numbers over time (implying increase in average farm size). This trend continues irrespective of the EU dairy policy type. For both Hungary and Poland the role of the subsistence sector is expected to substantially decrease over time.
Teaching Agricultural Policy Using Games: The Agripol Game
Creators: name: Jongeneel, Roelof A.
name: Koning, Niek
name: Jongeneel, Roelof A.
name: Koning, Niek
Publisher: name: Unknown
Year: 2005
Subjects: subject: Teaching/Communication/Extension/Profession
subject: economics education
subject: political economy
subject: agricultural policy

description: We developed the AGRIPOL game as a tool for teaching agricultural policy to economic and non-economic students. AGRIPOL consists of a world with 7 different countries, each one represented by a small group of students. The students have to maximize their country's social welfare by choosing an optimal set of policy instruments. By doing this students learn in an interesting and hands-on way to understand the workings of agricultural policy instruments, the interrelatedness between countries (policy impact spill-overs) and the role of political weights in the policy formation process. A WTO negotiation round is included to let students experience the difficulties and benefits of cooperation.