cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Developing thoughtful, responsible, active citizenship by exploring controversial topics with a grade 9 class : a teacher's journey
Creators: name: Brand, Christina L.
Publisher: name: University of British Columbia
Year: 2009

description: This study originated in response to a change in my teaching position. As a teacher new to secondary social studies, who transferred from the elementary ranks in the school year 1995-1996,1 was intrigued by the rationale of the Social Studies 8-10 Integrated Resource Package which was stated as "the overarching goal of social studies is to develop thoughtful, responsible, active citizens who are able to acquire the requisite information to consider multiple perspectives and make reasoned judgments", but I wasn't sure how to implement it. I needed to clarify what "responsible, active citizenship" might involve and what "thoughtful" meant in this regard. Furthermore, how would I teach students the ability to make reasoned judgments? A second question was inextricably linked to the first, although it arose in a different way. I quickly found that I enjoyed discussing controversial topics with secondary students, but was unsure of how to promote discourse as opposed to shouting matches. Additionally, I wondered how to teach skills of reasoned inquiry and how we might resolve issues of injustice in a hopeful manner? I decided to investigate my own practice in regard to these questions. My teaching journal, student work, and some audio taped evidence, were the primary sources of data for the study. I first share my research into concepts of democratic citizenship best promoted by a public school system. Next, I outline how I developed a teaching unit, utilizing aspects of the Shared Learnings curriculum, that focused on controversial topics. Third, I share the experiences in teaching that unit, and the reflections that ensued as I did so. Finally, I look at the changes that resulted in my social studies teaching and the possible implications for other educators. Generally, I conclude that teaching the skills of philosophy, in combination with discourse and an ethic of care, can promote active, responsible citizenship even in young secondary school students. I encourage other educators to explore similar avenues for themselves, and their students.
China's WTO Accession: Conflicts with Domestic Agricultural Policies and Institutions
Creators: name: Colby, Hunter
name: Diao, Xinshen
name: Tuan, Francis C.
name: Colby, Hunter
name: Diao, Xinshen
name: Tuan, Francis C.
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: accession
subject: China
subject: domestic policies and institutions
subject: WTO

description: This analysis examines the implications of WTO accession for China's domestic policies and institutions by identifying some of China's agricultural policies and institutional arrangements that may generate conflicts with WTO requirements and analyzing the nature and extent of the conflict. We differentiate three alternative ways that China's current domestic policy or institutions may conflict with or be incompatible with WTO accession: (1) the domestic policy or institution is expressly prohibited by WTO rules and principles; (2) the changes required by WTO accession impose additional costs on the government such that the existing policy or institutions are difficult to sustain; and (3) the changes required for WTO accession reduce the effectiveness of the policies or institutions.
Chiral anomaly and positive longitudinal magnetoresistance in the type-II Dirac semimetals $\it{A}_x$PdTe$_2$ (\textit{A} = Cu, Ag)
Creators: name: Sonika
name: Gagwar, Sunil
name: Mehta, Nikhlesh Singh
name: Sharma, G.
name: Yadav, C. S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Planar Hall effect (PHE) in topological materials has been a subject of great interest in recent years. Generally, it is understood to originate from the chiral-anomaly (CA) induced charge pumping between doubly degenerate Weyl nodes. However, the occurrence of PHE in the materials with positive and anisotropic orbital magnetoresistance has raised questions about CA being the sole origin of this effect. Here, we report the PHE, magnetoresistance, and thermal transport properties (Seebeck and Nernst coefficients) on the Ag intercalated PdTe$_2$. We observe positive longitudinal magnetoresistance, the linear field dependence of the amplitude of PHE, and a prolate pattern in the parametric plots. The planar Hall resistivity and anisotropic magnetoresitance fits well with theoretical study of CA being the origin of PHE. So, our observations are consistent with Weyl physics dominating the PHE in PdTe$_2$, Cu$_{0.05}$PdTe$_2$, and Ag$_{0.05}$PdTe$_2$. We further support our data with a theoretical model that reproduces the qualitative experimental features. In addition, we have calculated the Seebeck ($\it{S}$) and Nernst ($ν$) coefficients for PdTe$_2$ and Cu and Ag intercalated compounds. The estimated values of Fermi energy for the Cu and Ag intercalated compounds are respectively two times and three times larger than that of PdTe$_2$.
description: 16 pages, 16 figures
Past production constrains current energy demands: persistent scaling in global energy consumption and implications for climate change mitigation
Creators: name: Garrett, Timothy J.
name: Grasselli, Matheus R.
name: Keen, Stephen
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Economics (econ.GN)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Climate change has become intertwined with the global economy. Here, we describe the importance of inertia to continued growth in energy consumption. Drawing from thermodynamic arguments, and using 38 years of available statistics between 1980 to 2017, we find a persistent time-independent scaling between the historical time integral $W$ of world inflation-adjusted economic production $Y$, or $W\left(t\right) = \int_0^t Y\left(t'\right)dt'$, and current rates of world primary energy consumption $\mathcal E$, such that $λ= \mathcal{E}/W = 5.9\pm0.1$ Gigawatts per trillion 2010 US dollars. This empirical result implies that population expansion is a symptom rather than a cause of the current exponential rise in $\mathcal E$ and carbon dioxide emissions $C$, and that it is past innovation of economic production efficiency $Y/\mathcal{E}$ that has been the primary driver of growth, at predicted rates that agree well with data. Options for stabilizing $C$ are then limited to rapid decarbonization of $\mathcal E$ through sustained implementation of over one Gigawatt of renewable or nuclear power capacity per day. Alternatively, assuming continued reliance on fossil fuels, civilization could shift to a steady-state economy that devotes economic production exclusively to maintenance rather than expansion. If this were instituted immediately, continual energy consumption would still be required, so atmospheric carbon dioxide concentrations would not balance natural sinks until concentrations exceeded 500 ppmv, and double pre-industrial levels if the steady-state was attained by 2030.
Coherent Propagation of Polaritons in Semiconductor Heterostructures: Nonlinear Pulse Transmission in Theory and Experiment
Creators: name: Schumacher, S.
name: Czycholl, G.
name: Jahnke, F.
name: Kudyk, I.
name: Wischmeier, L.
name: Rückmann, I.
name: Voss, T.
name: Gutowski, J.
name: Gust, A.
name: Hommel, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The influence of coherent optical nonlinearities on polariton propagation effects is studied within a theory-experiment comparison. A novel approach that combines a microscopic treatment of the boundary problem in a sample of finite thickness with excitonic and biexcitonic nonlinearities is introduced. Light-polarization dependent spectral changes are analyzed for single-pulse transmission and pump-probe excitation.
Biotechnology: Can We Trade It?
Creators: name: Bredahl, Maury E.
name: Kalaitzandonakes, Nicholas G.
name: Bredahl, Maury E.
name: Kalaitzandonakes, Nicholas G.
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Relations/Trade
subject: GMO
subject: institutions
subject: investment
subject: labelling
subject: trade

description: The question in the title is divided into: (1) Can we trade the current generation of products from biotech or the technology itself? and (2) Can we trade the future generations of products of the technology? Controversy over the first generation of products has resulted in international trade being segmented into two markets: GMO-free and GMO. The first market is supported by voluntary labelling, making mandatory labelling largely unnecessary. While trade flows have been rearranged, markets have been little affected. We conclude that trade in the future generation will be dominated by capital and technology flows, with production for local markets dominating product trade flows.
EOSC-hub D5.1 Initial maintenance and integration plan for federation and collaboration services
Creators: name: Weber, Pavel
Publisher: name: Zenodo
Year: 2018

description: This document outlines the initial maintenance and integration plan for EOSC-hub federation and collaboration services. The plan has been established based on analysis of requirements coming from associated user communities, contributions of e-Infrastructure service providers. The deliverable provides high-level description of the architecture of each service in WP5 package, its maintenance plan and defines the initial integration activities and preliminary development roadmap. It elaborates the work plan for collaboration between WP5 and OpenAIRE initiative.
Mass spectrum of $1^{--}$ heavy quarkonium
Creators: name: Zhao, Zheng
name: Xu, Kai
name: Limphirat, Ayut
name: Sreethawong, Warintorn
name: Tagsinsit, Nattapat
name: Kaewsnod, Attaphon
name: Liu, Xuyang
name: Khosonthongkee, Khanchai
name: Cheedket, Sampart
name: Yan, Yupeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the masses and leptonic decay widths of the bottomonium $b\bar b$ and charmonium $c\bar c$ states in a constituent quark model where the Cornell-like potential and spin-dependent interaction are employed, with all model parameters predetermined by studying ground and first radial excited states of S- and P-wave heavy quarkonium mesons. By comparing the theoretical predictions for $J^{PC}=1^{--}$ quarkonium states with experimental data and considering possible mixtures of $nS$ and $(n-1)D$ states, we provide tentative assignments for all observed $J^{PC}=1^{--}$ heavy quarkonia. The work suggests that the $Υ$(10860) and $Υ$(11020) are $b\bar b$ $5S-4D$ mixture states, and the $ψ$(4360) and $ψ$(4415) are largely $4S$ and $3D$ $c\bar c$ states respectively. The $ψ$(4260) may not be accommodated with the conventional meson picture in the present work.
Issues and Options for the Multilateral Regulation of GM Foods
Creators: name: Buckingham, Donald E.
name: Phillips, Peter W.B.
name: Buckingham, Donald E.
name: Phillips, Peter W.B.
Publisher: name: Unknown
Year: 2001
Subjects: Food Consumption/Nutrition/Food Safety

description: As genetically modified food commodities have entered markets in recent years, domestic regulators have attempted to manage consumer, environmental and citizen concerns about these new products. One result has been incomplete and at times inconsistent domestic regulation, which has created international conflicts about market access. A number of international institutions have attempted in recent years to bridge the gulf between exporters and importers. This paper reviews recent international developments and offers options for different strategies for reducing the current tensions in international markets.
A note about convected time derivatives for flows of complex fluids
Creators: name: Stone, Howard A.
name: Shelley, Michael J.
name: Boyko, Evgeniy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a direct derivation of the typical time derivatives used in a continuum description of complex fluid flows, harnessing the principles of the kinematics of line elements. The evolution of the microstructural conformation tensor in a flow and the physical interpretation of different derivatives then follow naturally.
description: 1 figure
Surveying the Local Supercluster Plane
Creators: name: Kashibadze, Olga G.
name: Karachentsev, Igor D.
name: Karachrntseva, Valentina E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the distribution and velocity field of galaxies situated in a band of 100 by 20 degrees centered on M87 and oriented along the Local supercluster plane. Our sample amounts 2158 galaxies with radial velocities less than 2000 km/s. Of them, 1119 galaxies (52%) have distance and peculiar velocity estimates. About 3/4 of early-type galaxies are concentrated within the Virgo cluster core, most of the late-type galaxies in the band locate outside the virial radius. Distribution of gas-rich dwarfs with $M_{\rm H\,I} > M_*$ looks to be insensitive to the Virgo cluster presence. Among 50 galaxy groups in the equatorial supercluster band 6 groups have peculiar velocities about 500-1000 km/s comparable with virial motions in rich clusters. The most cryptic case is a flock of nearly 30 galaxies around NGC4278 (Coma I cloud), moving to us with the mean peculiar velocity of $-$840 km/s. This cloud (or filament?) resides at a distance of 16.1 Mpc from us and approximately 5 Mpc away from the Virgo center. Galaxies around Virgo cluster exhibit Virgocentric infall with an amplitude of about 500 km/s. Assuming the spherically symmetric radial infall, we estimate the radius of the zero-velocity surface to be $R_0 = (7.0\pm0.3)$ Mpc that yields the total mass of Virgo cluster to be $(7.4\pm0.9)\times 10^{14} M_{\odot}$ in tight agreement with its virial mass estimates. We conclude that the Virgo outskirts does not contain significant amounts of dark mater beyond its virial core.
description: 19 pages, 13 figures, 4 tables. Published in Astrophysical Bulletin, Vol.73, pp.124-141 (2018)
Testing Choice Experiment for Benefit Transfer
Creators: name: Colombo, Sergio
name: Calatrava-Requena, Javier
name: Conzalex-Roa, M.C.
name: Colombo, Sergio
name: Calatrava-Requena, Javier
name: Conzalex-Roa, M.C.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Research Methods/ Statistical Methods
subject: choice experiment
subject: benefit transfer
subject: soil erosion

description: Benefit transfer is a cost-effective method for estimating the value of environmental goods that relies on information obtained in previous studies. The multi-attribute approach of choice experiment should provide advantages in terms of benefit transfer allowing differences in environmental improvements between sites as well as differences in socio-economic and attitude characteristics between respondent populations. Furthermore, choice experiment allows the estimation of implicit prices and the welfare change for many scenarios. If the transferability of these values is confirmed, that would be good news for benefit transfer practitioners. This paper investigates the capability of choice experiment method to be used in environmental benefit transfer.
Consumer Attitude and Behaviour Towards "Flandria" Quality Labelled Tomatoes
Creators: name: Van De Velde, Liesbeth
name: D'Hooghe, Katrien
name: Kuhne, Bianka
name: Verbeke, Wim
name: Van De Velde, Liesbeth
name: D'Hooghe, Katrien
name: Kuhne, Bianka
name: Verbeke, Wim
Publisher: name: Unknown
Year: 2005
Subjects: subject: Consumer/Household Economics
subject: quality labelling
subject: consumer attitude
subject: consumer behaviour
subject: tomatoes
subject: Belgium

description: In recent years, trust in food safety and food quality has decreased as a result of consecutive food crises. Consequently, numerous quality labels signalling credence characteristics have been established. One of these labels is the Belgian Flandria label for fresh fruit and vegetables. Based on a self-administered consumer survey (n=373), this paper addresses questions about consumer attitudes, behaviour and perception towards tomatoes in general, and the Flandria tomato label in particular. Principal component analysis and consumer segmentation are performed. The findings indicate that the Flandria label may have become the new standard for tomatoes and may have lost a major part of its differentiation potential by being positioned "in the middle" and being too intensively used for a wide range of other fruits and vegetables.
Current Status of the Muon g-2 Interpretations within Two-Higgs-Doublet Models
Creators: name: Iguro, Syuhei
name: Kitahara, Teppei
name: Lang, Martin S.
name: Takeuchi, Michihisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this article, we review and update implications of the muon anomalous magnetic moment (muon $g-2$) anomaly for two-Higgs-doublet models (2HDMs), which are classified according to imposed symmetries and their resulting Yukawa sector. In the minimal setup, the muon $g-2$ anomaly can be accommodated by the type-X (lepto-philic) 2HDM, flavor-aligned 2HDM (FA2HDM), muon-specific 2HDM ($μ$2HDM), and $μτ$-flavor violating 2HDM. We summarize all relevant experimental constraints from high-energy collider experiments and flavor experiments, as well as the theoretical constraints from the perturbative unitarity and vacuum stability bounds, to these 2HDMs in light of the muon $g-2$ anomaly. We clarify the available parameter spaces of these 2HDMs and investigate how to probe the remaining parameter regions in future experiments. In particular, we find that, due to the updated $B_s\toμ^+ μ^-$ measurement, the remaining parameter region of the FA2HDM is almost equivalent to the one of the type-X 2HDM. Furthermore, based on collider simulations, we find that the type-X 2HDM is excluded and the $μ$2HDM scenario will be covered with the upcoming Run 3 data.
description: 46 pages, 9 figures, 2 tables
Exploring Ququart Computation on a Transmon using Optimal Control
Creators: name: Seifert, Lennart Maximilian
name: Li, Ziqian
name: Roy, Tanay
name: Schuster, David I.
name: Chong, Frederic T.
name: Baker, Jonathan M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Contemporary quantum computers encode and process quantum information in binary qubits (d = 2). However, many architectures include higher energy levels that are left as unused computational resources. We demonstrate a superconducting ququart (d = 4) processor and combine quantum optimal control with efficient gate decompositions to implement high-fidelity ququart gates. We distinguish between viewing the ququart as a generalized four-level qubit and an encoded pair of qubits, and characterize the resulting gates in each case. In randomized benchmarking experiments we observe gate fidelities greater 95% and identify coherence as the primary limiting factor. Our results validate ququarts as a viable tool for quantum information processing.
Large mass enhancement in RbOs2O6
Creators: name: Brühwiler, M.
name: Kazakov, S. M.
name: Karpinski, J.
name: Batlogg, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Heat capacity measurements on the recently discovered geometrically frustrated beta-pyrochlore superconductor RbOs2O6 (Tc=6.4 K) yield a Sommerfeld coefficient of 44 mJ/(molf.u. K^2). This is about 4 times larger than the one found in band structure calculations. In order to specify the enhancement due to electron-electron interactions, we have measured the electron-phonon enhancement. By a suitable analysis, an electron-phonon coupling constant lambda_ep = 1 +/- 0.1 is derived from the specific heat jump at Tc. This leaves a significant additional lambda_add = 2.1 +/- 0.3 for enhancement due to other mechanisms, possibly related to the triangular lattice. To arrive at these results, an appropriate analysis method for bulk thermodynamic data based on the condensation energy was applied.
description: Accepted in Physica B
Transition Frequencies and Hyperfine Structure in $^{113,115}$In$^+$: Application of a Liquid-Metal Ion Source for Collinear Laser Spectroscopy
Creators: name: König, Kristian
name: Krämer, Jörg
name: Imgram, Phillip
name: Maaß, Bernhard
name: Nörtershäuser, Wilfried
name: Ratajczyk, Tim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate the first application of a liquid-metal ion source for collinear laser spectroscopy in proof-of-principle measurements on naturally abundant In$^+$. The superior beam quality, i.e., the actively stabilized current and energy of a beam with very low transverse emittance, allowed us to perform precision spectroscopy on the $5s^2\;^1\mathrm{S}_0 \rightarrow 5s5p\;^3\mathrm{P}_1$ intercombination transition in $^{115}$In$^+$, which is to our knowledge the slowest transition measured with collinear fluorescence laser spectroscopy so far. By applying collinear and anticollinear spectroscopy, we improved the center-of-gravity frequency $ν_\mathrm{cg}=1\,299\,617\,759.\,3\,(1.2)$ and the hyperfine constants $A=6957.19\,(28)$\,MHz and $B=-443.7\,(2.4)$\,MHz by more than two orders of magnitude. A similar accuracy was reached for $^{113}$In$^+$ in combination with literature data and the isotope shift between both naturally abundant isotopes was deduced to $ν(^{113}\mathrm{In})-ν(^{115}\mathrm{In})=696.3\,(3.1)$\,MHz. Nuclear alignment induced by optical pumping in a preparation section of the ion beamline was demonstrated as a pump-and-probe approach to provide sharp features on top of the Doppler broadened resonance profile.
Virialization in Dark Energy Cosmology
Creators: name: Wang, Peng
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the issue of energy nonconservation in the virialzation process of spherical collapse model with homogeneous dark energy. We propose an approximation scheme to find the virialization radius. By comparing various schemes and estimating the parameter characterizing the ratio of dark energy to dark matter at the turn-around time, we conclude that the problem of energy nonconservation may have sizable effects in fitting models to observations.
description: 11 pages, 3 figures, explanation added. Accepted by Astrophysical Journal
Deformation of Cayley's hyperdeterminants
Creators: name: Cai, Tommy Wuxing
name: Jing, Naihuan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary: 05E05, Secondary: 17B69, 05E10

description: We introduce a deformation of Cayley's second hyperdeterminant for even-dimensional hypermatrices. As an application, we formulate a generalization of the Jacobi-Trudi formula for Macdonald functions of rectangular shapes generalizing Matsumoto's formula for Jack functions.
description: 9 pages, 0 figures
Pharmacodynamic effect of mTOR inhibition on immune cell subsets in patients after kidney transplantation by determination of p70S6 Kinase phosphorylation
Creators: name: Yin, Decheng
Publisher: name: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Year: 2024
Subjects: kidney transplantation, Phosphoflow cytometry, Immunosuppressive therapy

description: Background: Immunosuppressive therapy is pivotal for sustained allograft and patient survival after renal transplantation. Mammalian target of rapamycin, also known as mechanistic target of rapamycin (mTOR) is a protein kinase that is a key regulator of the PI3K/AKT/mTOR signaling pathway, which is involved in the alloimmune response leading to allograft rejection. The activity of mTOR in B cells in the setting of renal transplantation and whether it might differ in between the different subsets has not been investigated so far. Methods: Phosphoflow cytometry was used to determine the extent of mTOR inhibition in peripherally circulating CD19+ B and CD+4 T cellular subsets by assessing the phosphorylation of p70S6K in renal transplant recipients treated with mTORi either in combination with Mycophenolic Acid (MPA, n=13), or Calcineurin inhibitors (CNI, n=19). Nine patients suffering from end stage renal disease on dialysis and 17 healthy age-matched volunteers served as a control group. Results: A significant loss of phosphorylation of p70S6K in memory B (CD27+CD24+CD38-) and naive B (CD27-CD24intCD38int) cells of patients treated with mTORi + CNI compared to healthy subjects was observed. Conclusion: Phosphoflow cytometric quantification of p70S6K phosphorylation offers an adjunct role to pharmacodynamically guide and the possibility to individualize an mTORi-based immunosuppressive therapy.
Gluphisia crenata
Creators: name: Joos, R Enato
name: Fritsch, Dieter
name: Bryner, Rudolf
name: Billen, Wolfgang
name: Wicki, Christoph
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Notodontidae
Gluphisia
Gluphisia crenata

description: 8747 Gluphisia crenata (Esper, 1785)
Münchenstein (BL), Merian Gärten, 18.6.2014. Seit 1980 erlitt die Art in der Region grosse Arealverluste. Nach 2000 sind nur wenige Nachweise bekannt.
description: Published as part of Joos, R Enato, Fritsch, Dieter, Bryner, Rudolf, Billen, Wolfgang & Wicki, Christoph, 2018, Vielfalt der nachtaktiven Gross- und Kleinschmetterlinge in zwei Parkanlagen bei Basel, pp. 57-71 in Entomo Helvetica 11 on page 62, DOI: 10.5169/seals-986024, http://zenodo.org/record/8034307
Walnut Preferences in Spain: Is the Spanish Consumer Ready for New Varieties?
Creators: name: Camarena-Gomez, Dena M.
name: Sanjuan, Ana Isabel
name: Camarena-Gomez, Dena M.
name: Sanjuan, Ana Isabel
Publisher: name: Unknown
Year: 2005
Subjects: subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: logit model
subject: stated preferences
subject: choice experiment
subject: walnuts

description: Stated consumer preferences for walnuts in Spain are investigated by means of a choice experiment. Conditional heterogeneity is explored, assuming two possible sources: how often walnuts are consumed and how driven by health and nutrition attitudes or convenience the consumer is. In particular, the possibilities for a mostly unknown variety in the Spanish market are investigated. Specific guidelines for the distribution and commercialisation of walnuts are provided.
Enabling discovery of solar system objects in large alert data streams
Creators: name: Montagner, R. Le
name: Peloton, J.
name: Carry, B.
name: Desmars, J.
name: Hestroffer, D.
name: Mendez, R. A.
name: Perlbarg, A. C.
name: Thuillot, W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: With the advent of large-scale astronomical surveys such as the Zwicky Transient Facility (ZTF), the number of alerts generated by transient, variable and moving astronomical objects is growing rapidly, reaching millions per night. Concerning solar system minor planets, their identification requires linking the alerts of many observations over a potentially large time, leading to a very large combinatorial number. This work aims to identify new candidates for solar system objects from massive alert data streams produced by large-scale surveys, such as the ZTF and the Vera C. Rubin Observatory's Legacy Survey of Space and Time. Our analysis used the Fink alert broker capabilities to reduce the 111,275,131 processed alerts from ZTF between November 2019 and December 2022 to only 389,530 new solar system alert candidates over the same period. We then implemented a linking algorithm, Fink-FAT, to create real-time trajectory candidates from alert data and extract orbital parameters. The analysis was validated on ZTF alert packets linked to confirmed solar system objects from the Minor Planet Center database. Finally, the results were confronted against follow-up observations. Between November 2019 and December 2022, Fink-FAT extracted 327 new orbits from solar system object candidates at the time of the observations, over which 65 were still unreported in the MPC database as of March 2023. After two late follow-up observation campaigns of six orbit candidates, four were associated with known solar system minor planets, and two remain unknown. Fink-FAT is deployed in the Fink broker and successfully analyzes in real time the alert data from the ZTF survey by regularly extracting new candidates for solar system objects. Our scalability tests also show that Fink-FAT can handle the even larger volume of alert data that the Rubin Observatory will send.
description: Published in A&A
Internationalization and Corporate Success - Empirical Evidence from the European Dairy Sector
Creators: name: Ebneth, Oliver
name: Theuvsen, Ludwig
name: Ebneth, Oliver
name: Theuvsen, Ludwig
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: globalization
subject: dairy industry
subject: cooperatives
subject: degree of internationalization
subject: corporate success

description: Increasingly, cooperatives in the agribusiness are being confronted with the globalization of agri-food markets. Cooperatives adapt to this development by internationalizing their activities. This paper presents a method of measuring the degree of internationalization (DoI) and its application to European cooperatives in the dairy sector. Then, the financial performance of these cooperatives is measured by applying balance sheet analysis. The paper ends with a discussion of why German cooperatives are noticeably less internationalized and show weaker financial performance than their European competitors.
What Factors Drive Individual Misperceptions of the Returns to Schooling in Tanzania? Some Lessons for Education Policy
Creators: name: Nikolov, Plamen
name: Jimi, Nusrat
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Evidence on educational returns and the factors that determine the demand for schooling in developing countries is extremely scarce. Building on previous studies that show individuals underestimating the returns to schooling, we use two surveys from Tanzania to estimate both the actual and perceived schooling returns and subsequently examine what factors drive individual misperceptions regarding actual returns. Using ordinary least squares and instrumental variable methods, we find that each additional year of schooling in Tanzania increases earnings, on average, by 9 to 11 percent. We find that on average individuals underestimate returns to schooling by 74 to 79 percent and three factors are associated with these misperceptions: income, asset poverty and educational attainment. Shedding light on what factors relate to individual beliefs about educational returns can inform policy on how to structure effective interventions in order to correct individual misperceptions.
Quantum derivation of the use of classical electromagnetic potentials in relativistic Coulomb excitation
Creators: name: Bayman, B. F.
name: Zardi, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We prove that a relativistic Coulomb excitation calculation in which the classical electromagnetic field of the projectile is used to induce transitions between target states gives the same target transition amplitudes, to all orders of perturbation theory, as would a calculation in which the interaction between projectile and target is mediated by a quantized electromagnetic field.
description: 1 .zip file containing LaTex source plus three figures as .eps files
Competing Antiferromagnetic-Ferromagnetic States in $\it{d^7}$ Kitaev Honeycomb Magnet
Creators: name: Vivanco, Hector K.
name: Trump, Benjamin A.
name: Brown, Craig M.
name: McQueen, Tyrel M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Kitaev model is a rare example of an analytically solvable and physically instantiable Hamiltonian yielding a topological quantum spin liquid ground state. Here we report signatures of Kitaev spin liquid physics in the honeycomb magnet $Li_3Co_2SbO_6$, built of high-spin $\it{d^7}$ ($Co^{2+}$) ions, in contrast to the more typical low-spin $\it{d^5}$ electron configurations in the presence of large spin-orbit coupling. Neutron powder diffraction measurements, heat capacity, and magnetization studies support the development of a long-range antiferromagnetic order space group of $\it{C_C}2/\it{m}$, below $\it{T_N}$ = 11 K at $\it{μ_0H}$ = 0 T. The magnetic entropy recovered between $\it{T}$ = 2 K and 50 K is estimated to be 0.6Rln2, in good agreement with the value expected for systems close to a Kitaev quantum spin liquid state. The temperature-dependent magnetic order parameter demonstrates a $β$ value of 0.19(3), consistent with XY anisotropy and in-plane ordering, with Ising-like interactions between layers. Further, we observe a spin-flop driven crossover to ferromagnetic order with space group of $\it{C}2/\it{m}$ under an applied magnetic field of $\it{μ_0H}$ $\approx$ 0.7 T at $\it{T}$ = 2 K. Magnetic structure analysis demonstrates these magnetic states are competing at finite applied magnetic fields even below the spin-flop transition. Both the $\it{d^7}$ compass model, a quantitative comparison of the specific heat of $Li_3Co_2SbO_6$, and related honeycomb cobaltates to the anisotropic Kitaev model further support proximity to a Kitaev spin liquid state. This material demonstrates the rich playground of high-spin $\it{d^7}$ systems for spin liquid candidates, and complements known $\it{d^5}$ Ir- and Ru-based materials.
description: 16 pages, 8 figures
Energy Crop Supply in France: A Min-Max Regret Approach
Creators: name: Kazakci, Akin
name: Rozakis, Stelios
name: Kazakci, Akin
name: Rozakis, Stelios
Publisher: name: Unknown
Year: 2005
Subjects: subject: Crop Production/Industries
subject: Resource /Energy Economics and Policy
subject: interval linear programming
subject: min-max regret
subject: energy crops
subject: France

description: This paper attempts to estimate energy crop supply using an LP model comprising hundreds of representative farms of the arable cropping sector in France. In order to enhance the predictive ability of such a model and to provide an analytical tool useful to policy makers, interval linear programming (ILP) is used to formalise bounded rationality conditions. In the presence of uncertainty related to yields and prices it is assumed that the farmer minimises the distance from optimality once uncertainty resolves introducing an alternative criterion to the classic profit maximisation rationale. Model validation based on observed activity levels suggests that about 40% of the farms adopt the min-max regret criterion. Then energy crop supply curves, generated by the min-max regret model, are proved to be upward sloped alike classic LP supply curves.
Milk Chain in Romania at the Start of Romania's Integration Into the European Union
Creators: name: Grodea, Mariana
name: Grodea, Mariana
Publisher: name: Unknown
Year: 2005
Subjects: subject: International Relations/Trade
subject: direct support (direct and additional payments)
subject: milk quota
subject: investments

description: In the perspective of accession to the EU, the Romanian dairy sector will have to comply with the EU norms and standards. Institutional capacity building, the creation and operation of certain specific market structures, sector revamping until the accession moment represent a priority objective of the domestic agricultural policy. The calculations regarding the EU direct support reveal that Romania will need additional funding sources in order to cover the needs in relation to the allocated milk quota.
Complex Hyperbolic Structures on Disc Bundles over Surfaces
Creators: name: Anan'in, Sasha
name: Grossi, Carlos H.
name: Gusevskii, Nikolay
Publisher: name: arXiv
Year: 2005
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57S30 (Primary) 30F35, 51M10, 57M50 (Secondary)

description: We study complex hyperbolic disc bundles over closed orientable surfaces that arise from discrete and faithful representations H_n->PU(2,1), where H_n is the fundamental group of the orbifold S^2(2,...,2) and thus contains a surface group as a subgroup of index 2 or 4. The results obtained provide the first complex hyperbolic disc bundles M->Σ that: admit both real and complex hyperbolic structures; satisfy the equality 2(χ+e)=3τ; satisfy the inequality χ/2PU(2,1) with fractional Toledo invariant; where χ is the Euler characteristic of Σ, e denotes the Euler number of M, and τ stands for the Toledo invariant of M. To get a satisfactory explanation of the equality 2(χ+e)=3τ, we conjecture that there exists a holomorphic section in all our examples. In order to reduce the amount of calculations, we systematically explore coordinate-free methods.
description: 52 pages, 12 pictures, 10 tables, 20 references. Changes: final version
Measuring non-linear functionals of quantum harmonic oscillator states
Creators: name: Pregnell, K. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using only linear interactions and a local parity measurement we show how entanglement can be detected between two harmonic oscillators. The scheme generalizes to measure both linear and non-linear functionals of an arbitrary oscillator state. This leads to many applications including purity tests, eigenvalue estimation, entropy and distance measures - all without the need for non-linear interactions or complete state reconstruction. Remarkably, experimental realization of the proposed scheme is already within the reach of current technology with linear optics.
description: 5 pages, 2 figures. Minor corrections and some new references added
Intersection theory rules symbology
Creators: name: Chen, Jiaqi
name: Feng, Bo
name: Yang, Li Lin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a novel method to determine the structure of symbols for any family of polylogarithmic Feynman integrals. Using the d log-bases and simple formulas for the leading order and next-to-leading contributions to the intersection numbers, we give a streamlined procedure to compute the entries in the coefficient matrices of canonical differential equations, including the symbol letters and the rational coefficients. We also provide a selection rule to decide whether a given matrix element must be zero. The symbol letters are deeply related to the poles of the integrands and also have interesting connections to the geometry of Newton polytopes. Our method can be applied to many cutting-edge multi-loop calculations. The simplicity of our results also hints at the possible underlying structure in perturbative quantum field theories.
description: 12 pages, 1 figure, recieved version
Analysing Wine Demand With Artificial Neural Networks
Creators: name: Gerolimetto, M.
name: Mauracher, Christine
name: Procidano, I.
name: Gerolimetto, M.
name: Mauracher, Christine
name: Procidano, I.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Demand and Price Analysis
subject: artificial neural networks
subject: demand analysis
subject: wine
subject: elasticity

description: In this paper we analyse wine demand in Italy using microdata. Instead of estimating a traditional parametric model (like AIDS) we employed artificial neural networks (ANN) and evaluate the elasticities using two different methods, specific for the non parametric framework. We compared the performances of the two methods to estimate elasticities and put in evidence the relevance of some demographic variables together with the usual economic ones, explaining the consumer's behaviour.
Effect of Poisson ratio on cellular structure formation
Creators: name: Bischofs, Ilka B.
name: Schwarz, Ulrich S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Mechanically active cells in soft media act as force dipoles. The resulting elastic interactions are long-ranged and favor the formation of strings. We show analytically that due to screening, the effective interaction between strings decays exponentially, with a decay length determined only by geometry. Both for disordered and ordered arrangements of cells, we predict novel phase transitions from paraelastic to ferroelastic and anti-ferroelastic phases as a function of Poisson ratio.
description: 4 pages, Revtex, 4 Postscript figures included
Vertical Market Structure, Commodity Exports and Trade Reform
Creators: name: McCorriston, Steve
name: Sexton, Richard J.
name: Sheldon, Ian M.
name: McCorriston, Steve
name: Sexton, Richard J.
name: Sheldon, Ian M.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Industrial Organization
subject: International Relations/Trade
subject: vertical market structure
subject: trade reform

description: In the analysis of commodity markets, comparatively little attention is paid to the fact that commodity exports are intermediates that form inputs into the food processing and retail sectors in developed countries. Exporting countries correspondingly argue that access to developed country markets are determined by market structure characteristics of the downstream food sector. Given the vertical nature of these markets, they are most appropriately characterised by successive oligopoly and/or oligopsony. We explore trade policy issues facing commodity exporters, and show that the impact of tariff reform on commodity exporters is determined by the market structure characteristics of the downstream sectors.
Teaching about architecture : a housing design unit in a secondary art classroom
Creators: name: Gustafson, Dianne Anitra
Publisher: name: University of British Columbia
Year: 2009

description: The study of architecture should be part of the high school art curriculum. The project documented in this thesis encouraged students to enlarge their knowledge, insights and understandings of architectural design, housing, neighbourhoods and environments. A foundation was provided on which to build future experiences with architecture. This study documents a search for relevant curriculum material and the results of a limited action research study.
SE(3) Koopman-MPC: Data-driven Learning and Control of Quadrotor UAVs
Creators: name: Narayanan, Sriram S. K. S.
name: Tellez-Castro, Duvan
name: Sutavani, Sarang
name: Vaidya, Umesh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel data-driven approach for learning and control of quadrotor UAVs based on the Koopman operator and extended dynamic mode decomposition (EDMD). Building observables for EDMD based on conventional methods like Euler angles (to represent orientation) is known to involve singularities. To address this issue, we employ a set of physics-informed observables based on the underlying topology of the nonlinear system. We use rotation matrices to directly represent the orientation dynamics and obtain a lifted linear representation of the nonlinear quadrotor dynamics in the SE(3) manifold. This EDMD model leads to accurate prediction and can be generalized to several validation sets. Further, we design a linear model predictive controller (MPC) based on the proposed EDMD model to track agile reference trajectories. Simulation results show that the proposed MPC controller can run as fast as 100 Hz and is able to track arbitrary reference trajectories with good accuracy. Implementation details can be found in \url{https://github.com/sriram-2502/KoopmanMPC_Quadrotor}.
Assessing energy dependence of the transport of relativistic electrons in perturbed magnetic fields with orbit-following simulations
Creators: name: Särkimäki, Konsta
name: Embreus, Ola
name: Nardon, Eric
name: Fülöp, Tünde
name: Contributors, JET
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Experimental observations, as well as theoretical predictions, indicate that the transport of energetic electrons decreases with energy. This reduction in transport is attributed to finite orbit width (FOW) effects. Using orbit-following simulations in perturbed tokamak magnetic fields that have an ideal homogeneous stochastic layer at the edge, we quantify the energy dependence of energetic electrons transport and confirm previous theoretical estimates. However, using magnetic configurations characteristic of JET disruptions, we find no reduction in RE transport at higher energies, which we attribute to the mode widths being comparable to the minor radius, making the FOW effects negligible. Instead, the presence of islands and nonuniform magnetic perturbations are found to be more important. The diffusive-advective transport coefficients calculated in this work, based on simulations for electron energies 10 keV -- 100 MeV, can be used in reduced kinetic models to account for the transport due to the magnetic field perturbations.
Decomposing a pulsed optical parametric amplifier into independent squeezers
Creators: name: Lvovsky, A. I.
name: Wasilewski, W.
name: Banaszek, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the concept of characteristic squeezing modes applied to a travelling-wave optical parametric amplifier pumped by an ultrashort pulse. The characteristic modes undergo decoupled single-mode squeezing transformations, and therefore they form a useful basis to describe the evolution of the entire multimode system. This provides an elegant and intuitive picture of quantum statistical properties of parametric fluorescence. We analyse the efficiency of detecting quadrature squeezing, and present results of numerical calculations for a realistic nonlinear medium.
description: 12 pages, 5 figures, REVTeX. Submitted to the proceedings of the Conference Quantum Optics VI, published as a Special Issue of Jounal of Modern Optics