cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
National Treatment and American Foreign Policy - The Evolution of National Treatment Approaches in International Trade
Creators: name: Kucherepa, Peter
name: Kucherepa, Peter
Publisher: name: Unknown
Year: 2006
Subjects: subject: International Relations/Trade
subject: international trade
subject: investment
subject: NAFTA
subject: national treatment

description: The National Treatment Clause, Article 1102 of the North American Free Trade Agreement, protects foreign investors from discrimination, including expropriation of their investments. This national treatment approach - equal treatment of foreign investors and local investors by states - was developed to encourage investment in Europe after the Second World War. Over the course of fifty years, the approach has evolved to provide foreign investors with protections over and above those provided to domestic investors. This article discusses the evolution of national treatment approaches, from affording foreign investors equal treatment to ensuring new investment conditions in international trade.
WTO Constraints on U.S. and EU Domestic Support in Agriculture: The October 2005 Proposals
Creators: name: Brink, Lars
name: Brink, Lars
Publisher: name: Unknown
Year: 2006
Subjects: subject: International Relations/Trade
subject: agriculture
subject: AMS
subject: de minimis
subject: domestic support
subject: overall reduction
subject: WTO

description: The USA, the EU and the G-20 submitted proposals on domestic support in the WTO agriculture negotiations in October 2005. This research projects future support, allowances and constraints for the USA and the EU under these proposals. Accounting properly for the de minimis rules generates a "maximum usable components" constraint, which, even when added to the cap on blue, can be more constraining than the new overall commitment. The overall commitment under the U.S. proposal constrains neither the USA nor the EU in the future. However, the overall commitment under the EU and G 20 proposals constrains both the USA and the EU to provide less future overall support than the sum of the cap on blue and maximum usable components. In general the three proposals are weak in constraining future distorting support in the USA and the EU.
A switchable two-dimensional electron gas based on ferroelectric Ca:SrTiO$_3$
Creators: name: Bréhin, Julien
name: Trier, Felix
name: Vicente-Arche, Luis M.
name: Hemme, Pierre
name: Noël, Paul
name: Cosset-Chéneau, Maxen
name: Attané, Jean-Philippe
name: Vila, Laurent
name: Sander, Anke
name: Gallais, Yann
name: Sacuto, Alain
name: Dkhil, Brahim
name: Garcia, Vincent
name: Fusil, Stéphane
name: Barthélémy, Agnès
name: Cazayous, Maximilien
name: Bibes, Manuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional electron gases (2DEGs) can form at the surface of oxides and semiconductors or in carefully designed quantum wells and interfaces. Depending on the shape of the confining potential, 2DEGs may experience a finite electric field, which gives rise to relativistic effects such as the Rashba spin-orbit coupling. Although the amplitude of this electric field can be modulated by an external gate voltage, which in turn tunes the 2DEG carrier density, sheet resistance and other related properties, this modulation is volatile. Here, we report the design of a ''ferroelectric'' 2DEG whose transport properties can be electrostatically switched in a non-volatile way. We generate a 2DEG by depositing a thin Al layer onto a SrTiO$_3$ single crystal in which 1 percent of Sr is substituted by Ca to make it ferroelectric. Signatures of the ferroelectric phase transition at 25 K are visible in the Raman response and in the temperature dependences of the carrier density and sheet resistance that shows a hysteretic dependence on electric field as a consequence of ferroelectricity. We suggest that this behavior may be extended to other oxide 2DEGs, leading to novel types of ferromagnet-free spintronic architectures.
Costs and Benefits of a WTO Dispute: The Economic Assessment; Technical Annex
Creators: name: Javelosa, Josyline C.
name: Schmitz, Andrew
name: Javelosa, Josyline C.
name: Schmitz, Andrew
Publisher: name: Unknown
Year: 2006
Subjects: International Relations/Trade

description: This document is the technical annex to the full paper "Costs and Benefits of a WTO Dispute: Philippine Bananas and the Australian Market" which is available separately.
Monetary Impacts and Overshooting of Agricultural Prices in a Transition Economy
Creators: name: Bakucs, Lajos Zoltan
name: Ferto, Imre
name: Bakucs, Lajos Zoltan
name: Ferto, Imre
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agricultural Finance
subject: agricultural prices
subject: exchange rates
subject: monetary shocks
subject: overshooting
subject: transition economy

description: The paper focus on the time adjustment paths of the exchange rate and prices in response to unanticipated monetary shocks following model developed by Saghaian et al. (2002). We employ Johansen's cointegration test along with a vector error correction model to investigate whether agricultural prices overshoot in a transition economy. The empirical results indicate that agricultural prices adjust faster than industrial prices to innovations in the money supply, affecting relative prices in the short run, but strict long-run money neutrality does not hold.
Dirac and Lagrangian reductions in the canonical approach to the first order form of the Einstein-Hilbert action
Creators: name: Kiriushcheva, N.
name: Kuzmin, S. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that the Lagrangian reduction, in which solutions of equations of motion that do not involve time derivatives are used to eliminate variables, leads to results quite different from the standard Dirac treatment of the first order form of the Einstein-Hilbert action when the equations of motion correspond to the first class constraints. A form of the first order formulation of the Einstein-Hilbert action which is more suitable for the Dirac approach to constrained systems is presented. The Dirac and reduced approaches are compared and contrasted. This general discussion is illustrated by a simple model in which all constraints and the gauge transformations which correspond to first class constraints are completely worked out using both methods in order to demonstrate explicitly their differences. These results show an inconsistency in the previous treatment of the first order Einstein-Hilbert action which is likely responsible for problems with its canonical quantization.
description: 40 pages
Maximum likelihood map-making with the Laser Interferometer Space Antenna
Creators: name: Contaldi, Carlo R.
name: Pieroni, Mauro
name: Renzini, Arianna I.
name: Cusin, Giulia
name: Karnesis, Nikos
name: Peloso, Marco
name: Ricciardone, Angelo
name: Tasinato, Gianmassimo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Given the recent advances in gravitational-wave detection technologies, the detection and characterisation of gravitational-wave backgrounds (GWBs) with the Laser Interferometer Space Antenna (LISA) is a real possibility. To assess the abilities of the LISA satellite network to reconstruct anisotropies of different angular scales and in different directions on the sky, we develop a map-maker based on an optimal quadratic estimator. The resulting maps are maximum likelihood representations of the GWB intensity on the sky integrated over a broad range of frequencies. We test the algorithm by reconstructing known input maps with different input distributions and over different frequency ranges. We find that, in an optimal scenario of well understood noise and high frequency, high SNR signals, the maximum scales LISA may probe are $\ell_{\rm max} \lesssim 15$. The map-maker also allows to test the directional dependence of LISA noise, providing insight on the directional sky sensitivity we may expect.
description: Corresponding author: Arianna I. Renzini, as a part of their PhD thesis. 13 pages, 9 figures
Wenn im Herbst die Kastanien blühen
Creators: name: Steinecke, Hilke
Publisher: name: Der Palmengarten
Year: 2021

description: Im Herbst treiben manche Rosskastanien (Aesculus) Blätter und Blüten aus. Dies ist eine Reaktion auf Stress. Kastanien-Miniermotten (Cameraria ohridella) sowie trocken-heiße Sommer bewirken, dass Kastanien ihr Laub bereits im Spätsommer verlieren. Durch diese auch beblätterten Nottriebe versucht der Baum, Photosyntheseverluste auszugleichen.
description: Der Palmengarten, Bd. 84 Nr. 2 (2020)
Verification of numerical weather prediction and avalanche forecasting
Creators: name: Roeger, Claudia
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is an attempt to help weather and avalanche forecasters in their decisionmaking process based on meteorological predictions by (1) quantifying some of the many uncertainties of meteorological forecasts and (2) combining numerical weather and avalanche prediction. In particular, output from two numerical weather prediction models was verified with surface data from two study sites: the ski area Whistler/Blackcomb in the Coast Mountains and the highway operation Kootenay Pass in the southern Selkirk Mountains. They represent two different mountain climates in British Columbia. The two highresolution, real-time, numerical weather forecast models that were running at U B C make daily forecasts on multiple nested grids out to 48 hours into the future. Domains with grid-point spacings of 2 km, 10 km, and 30 km were used for Kootenay Pass. At Whistler/Blackcomb, the grid-point spacings were 3.3 km and 10 km. Both weather models perform well. Temperature and wind predictions are very accurate with the post-processing Kalman-predictor correction method. Precipitation amount is under-forecast, which should be considered when used in avalanche prediction. The model with the 30 km grid spacing has comparable results to the higher-resolution model. The 2km-grid of this model performs slightly better than the corresponding lOkm-grid at the Kootenay Pass stations. 24-hour forecasts were generally more accurate than 48-hour forecasts. The forecast output for Kootenay Pass was used as input for a local avalanche forecasting model. This 24-hour avalanche forecast was verified against observed avalanche occurrence and against the 12-hour avalanche forecast with current weather observations. The combination of numerical weather prediction and numerical avalanche forecasting looks very promising. The avalanche model output for the test run with numerically predicted weather data is very similar to the run with observed weather data. This indicates that avalanches may be predicted statistically out to 24 hours into the future with high-resolution numerical weather prediction as input. However, the weather and avalanche forecast errors should be taken into account during operational use.
Performance of Services: A Framework to Assess Farm Extension Services
Creators: name: Labarthe, Pierre
name: Labarthe, Pierre
Publisher: name: Unknown
Year: 2005
Subjects: subject: Teaching/Communication/Extension/Profession
subject: agricultural extension services
subject: information and knowledge

description: There is in Europe a trend for privatisation and commercialisation of technical extension services for agriculture. At the same time, extension is supposed to support the contribution of multifunctional agriculture (MFA) to rural development. This article proposes an analytic framework to test whether performances of commercial extension enable to enhance the effectiveness of intangible investments in MFA context. Empirical investigations were realised about technical extension for cereal production in Ain (France) and Zeeland (Netherlands). It appears that [A] private extension providers hardly invest in R&D relevant to MFA context; [B] some farmers who contribute to MFA may lack technical knowledge when provided by commercial extension.
Flight model characterization of the wide-field off-axis telescope for the MATS satellite
Creators: name: Park, Woojin
name: Hammar, Arvid
name: Pak, Soojong
name: Chang, Seunghyuk
name: Gumbel, Jörg
name: Megner, Linda
name: Christensen, Ole Martin
name: Rouse, Jordan
name: Kim, Dae Wook
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present optical characterization, calibration, and performance tests of the Mesospheric Airglow/Aerosol Tomography Spectroscopy (MATS) satellite, which for the first time for a satellite applies a linear-astigmatism-free confocal off-axis reflective optical design. Mechanical tolerances of the telescope were investigated using Monte-Carlo methods and single-element perturbations. The sensitivity analysis results indicate that tilt errors of the tertiary mirror and a surface RMS error of the secondary mirror mainly degrade optical performance. From the Monte-Carlo simulation, the tolerance limits were calculated to $\pm$0.5 mm, $\pm$1 mm, and $\pm$0.15$^\circ$ for decenter, despace, and tilt, respectively. We performed characterization measurements and optical tests with the flight model of the satellite. Multi-channel relative pointing, total optical system throughput, and distortion of each channel were characterized for end-users. Optical performance was evaluated by measuring modulation transfer function (MTF) and point spread function (PSF). The final MTF performance is 0.25 MTF at 20 lp/mm for the ultraviolet channel (304.5 nm), and 0.25 - 0.54 MTF at 10 lp/mm for infrared channels. The salient fact of the PSF measurement of this system is that there is no noticeable linear astigmatism detected over wide field of view (5.67$^\circ$ $\times$ 0.91$^\circ$). All things considered, the design method showed great advantages in wide field of view observations with satellite-level optical performance.
description: 21 pages, 11 figures
Mit dem Smartphone für die Wissenschaft – Wie Bürger zur Kenntnis der Frankfurter und hessischen Flora beitragen können
Creators: name: Starke-Ottich, Indra
name: Schmidt, Marco
name: Zizka, Georg
Publisher: name: Der Palmengarten
Year: 2021

description: Die kostenlose App „iNaturalist“ bringt interessierte Laien und Experten zusammen. Die App schafft einen niedrigschwelligen Zugang zur Biodiversitätserfassung und Pflanzenbestimmung, Experten sorgen ehrenamtlich für Qualitätssicherung. Auf verschiedenen räumlichen Ebenen wurden Projekte initiiert, z.B. durch die BVNH e.V., das Forschungsinstitut Senckenberg und die Goethe-Universität. Ziel aller Projekte ist die Verbesserung der Kenntnis der Verbreitung von Arten. Dabei gibt es jedoch unterschiedliche Ansätze, z.B. gezielt im Gelände nach ausgewählten Arten zu suchen, die Verknüpfung mit historischen Daten und die Einbindung in die universitäre Lehre.
description: Der Palmengarten, Bd. 84 Nr. 2 (2020)
Multi-observable Uncertainty Equality based on the sum of standard deviations in the qubit system
Creators: name: Zheng, Xiao
name: Ma, Shaoqiang
name: Zhang, Guofeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct a multi-observable uncertainty equality as well as an inequality based on the sum of standard deviations in the qubit system. The obtained equality indicates that the uncertainty relation can be expressed more accurately, and also can be used to detect the mixedness of the system. Meanwhile, the new uncertainty inequality can provide a tighter lower bound, and the tightness can be maintained at a high level even in an open system. Furthermore, the deficiency of the uncertainty relation, that the lower bound of the product form uncertainty relations can be null even for two incompatible observables, can be completely fixed by the new uncertainty relation.
An Econometric Model of CGE Simulations
Creators: name: Hess, Sebastian
name: Hess, Sebastian
Publisher: name: Unknown
Year: 2005
Subjects: subject: Research Methods/ Statistical Methods
subject: CGE
subject: systematic review
subject: Doha round
subject: evaluation

description: CGE models are widely used tools for economic assessments of trade policy changes. However, overall confidence in their results tends to be low. We employ the methodological framework of meta-analysis in order to approach a quantitative comparison of CGE-based simulation results. Therefore, we compile a dataset of twelve recent Doha simulations and fit a linear regression model that explains the variance between simulation results on the regional level as a function of various modeling characteristics. The estimates are broadly in range with documented qualitative knowledge about modeling assumptions. The size of the sample limits general conclusions; however, an ongoing research project will extend the approach to a larger sample.
Mixing actions of the rationals
Creators: name: Miles, Richard
name: Ward, Tom
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 22D40; 37A15

description: We study mixing properties of algebraic actions of $\mathbb Q^d$, showing in particular that prime mixing $\mathbb Q^d$ actions on connected groups are mixing of all orders, as is the case for $\mathbb Z^d$-actions. This is shown using a uniform result on the solution of $S$-unit equations in characteristic zero fields due to Evertse, Schlickewei and Schmidt. In contrast, algebraic actions of the much larger group $\mathbb Q^*$ are shown to behave quite differently, with finite order of mixing possible on connected groups.
Construction and Application of an LP Farm Model with an Integrated Life Cycle Assessment for the Determination of Sustainable Milk Production Systems
Creators: name: Mohring, Anke
name: Zimmermann, Albert
name: Mohring, Anke
name: Zimmermann, Albert
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: Life Cycle Assessment (LCA)
subject: LP-model
subject: dairy production
subject: production system

description: The increasingly stringent conditions underlying Swiss dairy production demand sustainable milk production systems that are economically optimized but also meet the ecological requirements of society. To determine such systems, a comparative-static LP model was constructed at farm level. Realistic production systems are reproduced in the model by means of binary variables. An Life Cycle Assessment (LCA) was integrated into the model to determine the environmental impacts of the farm. To this effect, the internal farm influences on production are illustrated in detail. An initial application of the model, in which a comparison of different income-optimized production systems was carried out, revealed some goal conflicts between economics and ecology. Systems involving full-time grazing achieved the best results in both aspects.
Geschichte des Botanischen Gartens an der Siesmayerstraße in Frankfurt am Main
Creators: name: Zizka, Georg
name: Dressler, Stefan
name: Wessel, Manfred
Publisher: name: Der Palmengarten
Year: 2021

description: Der Botanische Garten an der Siesmayerstraße in Frankfurt ist seit dem 1.1.2012 Teil des städtischen Palmengartens. Die Ge- schichte eines Botanischen Gartens in Frankfurt reicht bis ins Jahr 1763 zurück, als Johann Christian Senckenberg die Dr. Senckenbergische Stiftung begründete, die dann Erbauerin und über 150 Jahre Trägerin des ersten Frankfurter Botanischen Gartens war. Fast hundert Jahre war dann die Goethe-Universität für den Botanischen Garten verantwortlich, heute ist es die Stadt Frankfurt. In dieser langen Geschichte ist es zu mehreren räumlichen Verlagerungen, Verkleinerungen und Vergrößerungen des Areals, tiefgreifender inhaltlicher Umgestaltung und schließlich sogar zur Entstehung eines weiteren Botanischen Gartens, des Wissenschaftsgartens am Riedberg, gekommen. Die Geschichte der Botanischen Gärten in Frankfurt ist ein gutes Beispiel für die große Bedeutung von Bürgerengagement und die enge Verbindung von privaten und öffentlichen wissenschaftlichen Institutionen und Vereinen in Frankfurt.
description: Der Palmengarten, Bd. 84 Nr. 2 (2020)
alte Wallonen-Eiche von Tricase oder „Die Eiche der hundert Ritter“
Creators: name: Kamm, Katharina
Publisher: name: Der Palmengarten
Year: 2021

description: „La quercia dei cento Cavalieri“ ist eine mehrere hundert Jahre alte Wallonen-Eiche (Quercus ithaburensis ssp. macrolepis). Sie wächst in Apulien, viele Sagen ranken sich um diesen eindrucksvollen alten Baum. Die Wallonen-Eiche kommt über den Balkan bis in die Türkei vor. Auffällig ist ihre große, schuppige Cupula. Diese Eichen-Art gedeiht auch im Palmengarten.
description: Der Palmengarten, Bd. 84 Nr. 2 (2020)
Geographies of exclusion: street drinking, gentrification and contests over public space
Creators: name: Pennay, Amy
name: Manton, E
name: Savic, M
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4407
subject: Policy and administration
classificationCode: 4206
subject: Public health

description: Background: Laws prohibiting the consumption of alcohol on the street have proliferated in Australia over the past 15 years. It is no coincidence that these laws have been implemented at the same time that significant advancements in urban renewal and gentrification have occurred in metropolitan cities. Methods: This paper draws on observational research as well as interviews and/or focus groups with street drinkers, residents and service providers (police, council workers, health workers and traders). Results: Environmental economic and social changes that have occurred through gentrification are central to ongoing debates around the use of public space in urban areas. Conclusion: The geographical exclusion of street drinkers that has occurred as a result of these laws warrants the consideration of a more socially responsible strategy than the current legislative approach.
Demand Analysis for Fish in Tunisia: An Empirical Approach
Creators: name: Dhehibi, Boubaker
name: Lachaal, Lassaad
name: Chebil, Ali
name: Dhehibi, Boubaker
name: Lachaal, Lassaad
name: Chebil, Ali
Publisher: name: Unknown
Year: 2005
Subjects: subject: Demand and Price Analysis
subject: fish demand
subject: Box-Cox transformation
subject: double-log model
subject: Tunisia

description: The aim of this paper is to analyze and determine the factors influencing fish demand in Tunisia during the 1975-2000 period. A Box-Cox transformation is used to select the appropriate functional form between linear and double-log models. Results indicate that the double-log form fits better the data and is used for the empirical analysis. Calculated elasticities from static model show that fish demand is price-inelastic and that fish can be considered as a normal good. However, the dynamic analysis using Houthakker-Taylor model suggests that fish consumption in Tunisia depends on consumers psychological-buying habits. Finally, the values of the short and the long-run elasticities indicate that per capita consumption of fish in Tunisia is growing, but at a slowing rate.
Modeling, Simulation and Implementation of a Bird-Inspired Morphing Wing Aircraft
Creators: name: Xiao, Kun
name: Chen, Yuxin
name: Jiang, Wuyao
name: Wang, Chenyao
name: Zhao, Longfei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present a design of a bird-inspired morphing wing aircraft, including bionic research, modeling, simulation and flight experiments. Inspired by birds and activated by a planar linkage, our proposed aircraft has three key states: gliding, descending and high-maneuverability. We build the aerodynamic model of the aircraft and analyze its mechanisms to find out a group of optimized parameters. Furthermore, we validate our design by Computational Fluid Dynamics (CFD) simulation based on Lattice-Boltzmann technology and determine three phases of the planar linkage for the three states. Lastly, we manufacture a prototype and conduct flight experiments to test the performance of the aircraft.
description: 2019 3rd International Conference on Robotics and Automation Sciences (ICRAS)
High-spatial-resolution observations of NH3 and CH3OH towards the massive twin cores NGC6334 I & I(N)
Creators: name: Beuther, H.
name: Thorwirth, S.
name: Zhang, Q.
name: Hunter, T. R.
name: Megeath, S. T.
name: Walsh, A. J.
name: Menten, K. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Molecular line observations of NH3 (J,K)=(1,1), (2,2) and CH3OH at 24.93GHz taken with the Australian Telescope Compact Array (ATCA) toward the massive twin cores NGC6334 I & I(N) reveal significant variations in the line emission between the two massive cores. The UCHII region/hot core NGC6334 I exhibits strong thermal NH3 and CH3OH emission adjacent to the UCHII region and coincident with two mm continuum peaks observed by Hunter et al. (in prep.). In contrast, we find neither compact NH3 nor thermal CH3OH line emission toward NGC6334 I(N). There, the NH3 emission is distributed over a broad region (>1') without a clear peak, and we find Class I CH3OH maser emission with peak brightness temperatures up to 7000K. The maser emission peaks appear to be spatially associated with the interfaces between the molecular outflows and the ambient dense gas. Peak NH3(1,1) line brightness temperatures >= 70K in both regions indicate gas temperatures of the same order. NH3 emission is also detected toward the outflow in NGC6334 I resulting in an estimated rotational temperature of Trot~19K. Furthermore, we observe CH3OH and NH3 absorption toward the UCHII region, the velocity structure is consistent with expanding molecular gas around the UCHII region. Thermal and kinematic effects possibly imposed from the UCHII region on the molecular core are also discussed.
description: Accepted for the Astrophysical Journal
Process dependence of the gluon Sivers function in $p^\uparrow p \to J/ψ+ X$ within a TMD approach in NRQCD
Creators: name: D'Alesio, Umberto
name: Maxia, Luca
name: Murgia, Francesco
name: Pisano, Cristian
name: Rajesh, Sangem
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the transverse single-spin asymmetry (SSA) for $J/ψ$ production in $p^\uparrow p \to J/ψ+ X$ within a TMD approach in non-relativistic QCD. Extending a previous study [1], we employ here the color-gauge invariant generalized parton model (CGI-GPM), in which spin and intrinsic transverse momentum effects are taken into account, together with leading-order initial- and final-state interactions (ISIs and FSIs). We find that, even when the heavy-quark pair is produced in a color-octet state, ISIs and FSIs lead to a nonvanishing SSA, allowing, in principle, to test the process dependence of the gluon Sivers function (GSF). We show that of the two independent contributions, due to the so-called $f$- and $d$-type GSFs, appearing in the CGI-GPM, the $d$-type one turns out to be dynamically suppressed. Therefore, as already found adopting the Color-Singlet Model approach for the $J/ψ$ formation [2], only the $f$-type GSF could play a role in phenomenology. A comparison with the corresponding results obtained in the generalized parton model, without the inclusion of ISIs and FSIs, is also carried out.
description: 19 pages, 12 figures (18 plots), 8 tables
Determining the Rashba parameter from the bilinear magnetoresistance response in a two-dimensional electron gas
Creators: name: Vaz, D. C.
name: Trier, F.
name: Dyrdał, A.
name: Johansson, A.
name: Garcia, K.
name: Barthélémy, A.
name: Mertig, I.
name: Barnaś, J.
name: Fert, A.
name: Bibes, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional (2D) Rashba systems have been intensively studied in the last decade due to their unconventional physics, tunability capabilities, and potential for spin-charge interconversion when compared to conventional heavy metals. With the advent of a new generation of spin-based logic and memory devices, the search for Rashba systems with more robust and larger conversion efficiencies is expanding. Conventionally, demanding techniques such as angle- and spin-resolved photoemission spectroscopy are required to determine the Rashba parameter $α_{R}$ that characterizes these systems. Here, we introduce a simple method that allows a quantitative extraction of $α_{R}$, through the analysis of the bilinear response of angle-dependent magnetotransport experiments. This method is based on the modulation of the Rashba-split bands under a rotating in-plane magnetic field. We show that our method is able to correctly yield the value of $α_{R}$ for a wide range of Fermi energies in the 2D electron gas at the LaAlO$_{3}$/SrTiO$_{3}$ interface. By applying a gate voltage, we observe a maximum $α_{R}$ in the region of the band structure where interband effects maximize the Rashba effect, consistently with theoretical predictions.
MnO Spin-Wave Dispersion Curves from Powder Diffraction Data
Creators: name: Goodwin, Andrew L.
name: Dove, Martin T.
name: Tucker, Matthew G.
name: Keen, David A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We describe a model-independent approach for the extraction of spin-wave dispersion curves from neutron total scattering data. The method utilises a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCProfile implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from powder diffraction data. Our analysis of these configurations gives spin-wave dispersion curves that agree well with those determined independently using neutron triple-axis spectroscopic techniques.
description: 4 pages, 1 figure
Открытость как эпистемическая ценность научной коммуникации
Creators: name: Institute of Philosophy, Russian Academy of Sciences
name: Elbakyan, Alexandra
Publisher: name: Институт Философии Российской Академии Наук
Year: 2023

description: Элбакян АлександраОткрытость как эпистемическая ценность научной коммуникации

Диссертация на соискание ученой степени кандидата философских наукСпециальность 5.7.1. – онтология и теория познанияДиссертационный совет 24.1.143.03Диссертация представлена в диссертационный совет 15 декабря 2023 г.

Диссертация выполнена в Федеральном государственном бюджетном учреждении науки Институте философии Российской академии наук в секторе теории познания

Научный руководитель: Шульга Елена Николаевна, доктор философских наук, ведущий научный сотрудник сектора методологии междисциплинарных исследований человека Института философии РАН
A simple theory of molecular organization in fullerene containing liquid crystals
Creators: name: Peroukidis, S. D.
name: Vanakaras, A. G.
name: Photinos, D. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Systematic efforts to synthesise fullerene containing LCs have produced a variety of successful model compounds. We present a simple molecular theory relating the self-organisation observed in these systems to their molecular structure. The interactions are modelled by dividing each molecule into a number of sub-molecular blocks to which specific interactions are assigned. Three types of blocks are introduced, corresponding to fullerene units, mesogenic units, and non-mesogenic linkage units. The blocks are constrained to move on a rectangular 3-dimensional lattice and molecular flexibility is allowed by retaining a number of representative conformations within the block representation of the molecule. Calculations are presented for a variety of molecular architectures including twin mesogenic branch mono-adducts of C60, twin dendro-mesogenic branch mono-adducts and conical (badminton shuttlecock) multi-adducts of C60. In spite of its many simplifications, the theory accounts remarkably well for the phase behaviour of these systems.
description: 22 pages, 9 figures
großen wissenschaftlichen Leistungen von Stefan Vogel (1925–2015) Teil 6 (Schluss). Die Pilzmückenblumen
Creators: name: Weber, Anton
name: Gerlach, Günter
Publisher: name: Der Palmengarten
Year: 2021

description: Nachdem Stefan Vogel in den späten 1950er-Jahren bewiesen hatte, dass bei den Kesselfallenblumen von Ceropegia (Apocynaceae-Asclepiadoideae) winzige Fliegen als Bestäuber agieren (Mikromyiophilie), konnte er zwanzig Jahre später eine weitere und ganz spezielle Fliegengruppe als Bestäuber ausmachen: Pilzmücken (Mycetophilidae, Sciaridae u.a.). Vogel konnte weiter zeigen, dass manche Blüten oder Blütenstände im Laufe der Evolution gestaltliche und olfaktorische Merkmale von Pilzen angenommen haben. Solche „Pilzmimeten“ haben sich in mindestens vier Verwandtschaftskreisen entwickelt: Aristolochiaceae (Osterluzeigewächse), Araceae (Aronstabgewächse), Corsiaceae und Orchideen. Als die vielleicht spektakulärsten Fälle sind zu nennen: Aristolochia arborea, mit einer vor dem Eingang der Kesselfalle stehenden Hutpilz-Attrappe, und die Arten der Gattung Dracula (Orchidaceae), deren Labellum den Hut eines Lamellen- oder Leistenpilzes imitiert.
description: Der Palmengarten, Bd. 84 Nr. 2 (2020)
Valuing the Option to Switch to Organic Farming: An Application to U.S. Corn and Soybeans
Creators: name: Wossink, Ada
name: Kuminoff, Nicolai V.
name: Wossink, Ada
name: Kuminoff, Nicolai V.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Crop Production/Industries
subject: option theory
subject: organic farming
subject: direct payments
subject: switching regression
subject: Conservation Security Program

description: Based on option value theory, we develop a theoretical model to assess the dollar compensation required for the conversion to organic farming. Our empirical model is a switching regression model with two regimes and we use county level data on organic and conventional corn and soybean production in the U.S. for the application. Assuming an interest rate of 10 percent, a conventional corn-soybean grower would need to receive a one-time payment of $315 per acre to compensate for the conversion cost and an additional $1,088 per acre to cover the long run higher production and market risks. The sum of these two values equals an annual payment of $228 per acre for a 10 year contact. The results are discussed in the context of the recently introduced Conservation Security Program, which will make direct payments to US farmers for organic practices.
The Effects of Energy Price Increases on Dutch Horticulture
Creators: name: Bunte, Frank H.J.
name: Van Galen, Michiel A.
name: Bunte, Frank H.J.
name: Van Galen, Michiel A.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Crop Production/Industries
subject: Resource /Energy Economics and Policy
subject: energy costs
subject: glasshouse vegetables and flowers
subject: model of international trade

description: This paper elaborates on the effects of a rise in energy costs for Dutch glasshouse horticultural producers. The effects on production, bilateral trade and consumption in 25 European countries plus Morocco, Turkey and the Rest of the World, are estimated using a version of the HORTUS partial equilibrium supply and demand model. This model includes 11 sorts of fruit and vegetables, and two categories of ornamental plants and flowers. As energy, especially natural gas, is a major intermediate input in Dutch glasshouse horticulture, it has potentially large impacts on producers and trade. The results indicate that a 10 percent increase in energy prices could cause significant shifts in production and trade flows, as well as some changes in consumption patterns. The effects are larger for more export oriented products, and dependent on the nature of competition on foreign as well as domestic markets.
Nuclear Corrections to Hyperfine Structure in Light Hydrogenic Atoms
Creators: name: Friar, J. L.
name: Payne, G. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Hyperfine intervals in light hydrogenic atoms and ions are among the most accurately measured quantities in physics. The theory of QED corrections has recently advanced to the point that uncalculated terms for hydrogenic atoms and ions are probably smaller than 0.1 parts per million (ppm), and the experiments are even more accurate. The difference of the experiments and QED theory is interpreted as the effect on the hyperfine interaction of the (finite) nuclear charge and magnetization distributions, and this difference varies from tens to hundreds of ppm. We have calculated the dominant component of the 1s hyperfine interval for deuterium, tritium and singly ionized helium, using modern second-generation potentials to compute the nuclear component of the hyperfine splitting for the deuteron and the trinucleon systems. The calculated nuclear corrections are within 3% of the experimental values for deuterium and tritium, but are about 20% discrepant for singly ionized helium. The nuclear corrections for the trinucleon systems can be qualitatively understood by invoking SU(4) symmetry.
description: 26 pages, 1 figure, latex - submitted to Physical Review C
Invariant metric on the extended Siegel-Jacobi upper half space
Creators: name: Berceanu, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 32F45, 53C55, 53B21, 81R30

description: The real Jacobi group $G^J_n(\mathbb{R})$, defined as the semidirect product of the Heisenberg group ${\rm H}_n(\R)$ with the symplectic group ${\mr {Sp}}(n,\mathbb{R})$, admits a matrix embedding in $\text{Sp}(n+1,\mathbb{R})$. The modified pre-Iwasawa decomposition of $\rm{Sp}(n,\mathbb{R})$ allows us to introduce a convenient coordinatization $S_n$ of $G^J_n(\mathbb{R})$, which for $G^J_1(\mathbb{R})$ coincides with the $S$-coordinates. Invariant one-forms on $G^J_n(\mathbb{R})$ are determined. The formula of the 4-parameter invariant metric on $G^J_1(\R)$ obtained as sum of squares of 6 invariant one-forms is extended to $G^J_n(\R)$, $n\in\mathbb{N}$. We obtain a three parameter invariant metric on the extended Siegel-Jacobi upper half space $\tilde{\mathcal{X}}^J_n\approx\mathcal{X}^J_n\times \mathbb{R}$ by adding the square of an invariant one-form to the two-parameter balanced metric on the Siegel-Jacobi upper half space $ {\mathcal{X}}^J_n =\frac{G^J_n(\mathbb{R})}{\mr{U}(n)\times\mathbb{R}}$.
description: 28 pages, Latex, amsart, AMS fonts
Modelling Trends in Food Market Integration: Method and an Application to Tanzanian Maize Markets
Creators: name: Van Campenhout, Bjorn
name: Van Campenhout, Bjorn
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: market integration
subject: transaction costs
subject: thresholds
subject: maize
subject: Tanzania

description: Pushed by increasing availability of price data and extensive market liberalisation efforts in many developing countries, research on food market integration has evolved rapidly over the last two decades. Empirical methods to measure market integration diverged in two directions: on the one hand, there is the Parity Bounds Model (PBM), while on the other hand the use of Threshold Autoregressive (TAR) Models has been proposed. This article provides a discussion of the two methods and argues that TAR models are more able to capture the dynamics of the arbitrage process underlying interconnected markets. Furthermore, we extend the standard TAR model to include a time trend in both the threshold and the adjustment parameter. Using weekly maize price data on seven selected markets in Tanzania, we illustrate how both transaction cost and the speed of adjustment have changed during the nineties.
Consequences of the 2003 CAP Reform on a Mediterranean Agricultural System of Portugal
Creators: name: Carvalho, Maria Leonor Da Silva
name: Godinho, Maria De Lurdes Ferro
name: Carvalho, Maria Leonor Da Silva
name: Godinho, Maria De Lurdes Ferro
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agricultural and Food Policy
subject: agricultural policy modelling
subject: decoupling
subject: Mediterranean

description: Agriculture in dry land Mediterranean areas faces considerable level of production risk as result of the unpredictable weather. Governmental income stabilisation instruments have had a major impact on Mediterranean farms in changing land allocation, and changing income levels and variability. Using a mathematical programming model, the impact of the 2003 CAP reform on land allocation and on income variability is evaluated for a Portuguese Mediterranean farm. The results show an increase of extensification of production activities. They also show an increase in total farm income, a reduction in relative total income variability and an increase in relative production income variability.
Spin-up over steep topography and the effects of a submarine canyon
Creators: name: Mirshak, Ramzi
Publisher: name: University of British Columbia
Year: 2009

description: Submarine canyons are common bathymetric features that cut into the continental shelf from the continental slope. During upwelling favourable conditions over the continental shelf, submarine canyons display enhanced upwelling, heavily impacting shelf-slope mass exchange. In this thesis, laboratory experiments were conducted to quantify how velocity, stratification and rotation affect canyon upwelling. Currents were forced by changing the rotation rate of an already rotating tank. Over time, the forced currents evolve, or spin-up, until the fluid within the tank is once again rotating at the same rate as the tank itself. A difference in the spin-up behaviour is observed when a canyon is not present in the laboratory topography. The dynamics that govern flow evolution when a canyon is not present are Ekman suction and diffusion, both of which can be affected by a sloped bottom boundary layer. A numerical model is developed that replicates the spin-up of a stratified fluid over the changing slopes of the laboratory topography in the absence of a canyon, incorporating both the decay of Ekman suction and the change in the diffusion of momentum which occur as the boundary layer flow is arrested by buoyancy effects. Observed spin-up with a canyon present is compared to predicted spin-up without a canyon. The difference measures a force imposed by the canyon, which is found to be proportional to U[sup 2.5]f[sup 0.5]/N, where U is the shelfbreak velocity, f is the Coriolis frequency and N is the buoyancy frequency. This force relates to the flux of water crossing the shelfbreak through the canyon. The results are applied to Astoria canyon, suggesting that in a strong upwelling event, the flux of water through the canyon is 1.3 x 10 ⁵m³ s⁻¹ , nearly 20 times larger than wind-induced upwelling over a similar length of the shelfbreak.
New Results From CLEO and BES
Creators: name: Seth, Kamal K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Latest experimental results from BES in the charmonium mass region, and those from CLEO in the bottomonium and charmonium spectroscopy are reviewed.
description: 12 pages, 12 figures, Presented at First Meeting of the APS Topical Group on Hadron Physics, Fermilab, Batavia, Illinois, Oct 24-26, 2004
Benefits of InterSite Pre-Processing and Clustering Methods in E-Commerce Domain
Creators: name: Chelcea, Sergiu Theodor
name: Da Silva, Alzennyr
name: Lechevallier, Yves
name: Tanasa, Doru
name: Trousse, Brigitte
Publisher: name: arXiv
Year: 2005
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: This paper presents our preprocessing and clustering analysis on the clickstream dataset proposed for the ECMLPKDD 2005 Discovery Challenge. The main contributions of this article are double. First, after presenting the clickstream dataset, we show how we build a rich data warehouse based an advanced preprocesing. We take into account the intersite aspects in the given ecommerce domain, which offers an interesting data structuration. A preliminary statistical analysis based on time period clickstreams is given, emphasing the importance of intersite user visits in such a context. Secondly, we describe our crossed-clustering method which is applied on data generated from our data warehouse. Our preliminary results are interesting and promising illustrating the benefits of our WUM methods, even if more investigations are needed on the same dataset.
A study of information needs and library use in three villages in rural Northamptonshire
Creators: name: Shelley, Jane
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: A study of information needs and library use in three villages in rural Northamptonshire
Radio Variability from Co-Rotating Interaction Regions Threading Wolf-Rayet Winds
Creators: name: Ignace, Richard
name: St-Louis, Nicole
name: Prinja, Raman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The structured winds of single massive stars can be classified into two broad groups: stochastic structure and organized structure. While the former is typically identified with clumping, the latter is typically associated with rotational modulations, particularly the paradigm of Co-rotating Interaction Regions (CIRs). While CIRs have been explored extensively in the UV band, and moderately in the X-ray and optical, here we evaluate radio variability from CIR structures assuming free-free opacity in a dense wind. Our goal is to conduct a broad parameter study to assess the observational feasibility, and to this end, we adopt a phenomenological model for a CIR that threads an otherwise spherical wind. We find that under reasonable assumptions, it is possible to obtain radio variability at the 10% level. The detailed structure of the folded light curve depends not only on the curvature of the CIR, the density contrast of the CIR relative to the wind, and viewing inclination, but also on wavelength. Comparing light curves at different wavelengths, we find that the amplitude can change, that there can be phase shifts in the waveform, and the the entire waveform itself can change. These characterstics could be exploited to detect the presence of CIRs in dense, hot winds.
description: to appear inn MNRAS