cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiplicity of very low-mass objects in the Upper Scorpius OB association: a possible wide binary population
Creators: name: Bouy, H.
name: Martin, E. L.
name: Brandner, W.
name: Zapatero-Osorio, M. R.
name: Bejar, V. J. S.
name: Schirmer, M.
name: Huelamo, N.
name: Ghez, A. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the initial results of a VLT/NACO high spatial resolution imaging survey for multiple systems among 58 M-type members of the nearby Upper Scorpius OB association. Nine pairs with separations below 100 have been resolved. Their small angular separations and the similarity in the brightness of the components (DMagK <1 for all of them), indicate there is a reasonable likelihood several of them are true binaries rather than chance projections. Follow-up imaging observations with WHT/LIRIS of the two widest binaries confirm that their near-infrared colours are consistent with physical very low mass binaries. For one of these two binaries, WHT/LIRIS spectra of each component were obtained. We find that the two components have similar M6-M7 spectral types and signatures of low-gravity, as expected for a young brown dwarf binary in this association. Our preliminary results indicate a possible population of very low-mass binaries with semimajor axis in the range 100 AU 150 AU, which has not been seen in the Pleiades open cluster. If these candidates are confirmed (one is confirmed by this work), these results would indicate that the binary properties of very low-mass stars and brown dwarfs may depend on the environment where they form.
description: 11 pages, 1 table, 7 figures, request high resolution copies to bouy@iac.es
A DERIVATIVE SECURITY APPROACH TO SETTING CROP REVENUE COVERAGE INSURANCE PREMIUMS
Creators: name: Stokes, Jeffrey R.
name: Stokes, Jeffrey R.
Publisher: name: Unknown
Year: 2000
Subjects: Risk and Uncertainty

description: The nature of indemnities and reliance on futures price averaging during two distinct time intervals throughout the production year imply Crop Revenue Coverage (CRC) insurance behaves like an exotic put option. Treating this type of insurance as a derivative security, an analytical model is developed and an algorithm for solving the model to place a lower bound on insurance premiums is presented. Monte Carlo simulation, taking into account the path-dependent nature of an Asian-type option, is then used to determine lower-bound estimates for insurance premiums on corn gross revenue under specified price and yield distributions.
Tailoring laser pulses with spectral and fluence constraints using optimal control theory
Creators: name: Werschnik, J.
name: Gross, E. K. U.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Within the framework of optimal control theory we develop a simple iterative scheme to determine optimal laser pulses with spectral and fluence constraints. The algorithm is applied to a one-dimensional asymmetric double well where the control target is to transfer a particle from the ground state, located in the left well, to the first excited state, located in the right well. Extremely high occupations of the first excited state are obtained for a variety of spectral and/or energetic constraints. Even for the extreme case where no resonance frequency is allowed in the pulse the algorithm achieves an occupation of almost 100%.
Conductance quantization and the 0.7x2e2/h conductance anomaly in one-dimensional hole systems
Creators: name: Danneau, R.
name: Clarke, W. R.
name: Klochan, O.
name: Micolich, A. P.
name: Hamilton, A. R.
name: Simmons, M. Y.
name: Pepper, M.
name: Ritchie, D. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied ballistic transport in a 1D channel formed using surface gate techniques on a back-gated, high-mobility, bilayer 2D hole system. At millikelvin temperatures, robust conductance quantization is observed in the quantum wire formed in the top layer of the bilayer system, without the gate instabilities that have hampered previous studies of 1D hole systems. Using source drain bias spectroscopy, we have measured the 1D subband spacings, which are 5-10 times smaller than in comparable GaAs electron systems, but 2-3 times larger than in previous studies of 1D holes. We also report the first observation of the anomalous conductance plateau at G = 0.7 x 2e2/h in a 1D hole system.
description: 10 pages, 3 figures
JOINT COSTS IN MEAT RETAILING
Creators: name: Hahn, William F.
name: Green, Richard D.
name: Hahn, William F.
name: Green, Richard D.
Publisher: name: Unknown
Year: 2000
Subjects: Demand and Price Analysis

description: A dynamic econometric model relating wholesale meat prices to retail prices and wholesale meat demand is estimated using monthly data on U.S. prices and quantities of beef, pork, and chicken. The hypothesis that meat retailing costs are separable is rejected; that is, the data support joint costs in meat retailing. The hypothesis that there are fixed proportions between wholesale meat inputs and retail meat outputs is accepted.
On the Dissociation Equilibrium of H2 in Very Cool, Helium-Rich White Dwarf Atmospheres
Creators: name: Kowalski, Piotr M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the dissociation equilibrium of $\rm H_2$ in very cool, helium-rich white dwarf atmospheres. We present the solution of the non-ideal chemical equilibrium for the dissociation of molecular hydrogen in a medium of dense helium. We find that at the photosphere of cool white dwarfs of $T_{\rm eff}\rm=4000 K$, the non-ideality results in an increase of the mole fraction of molecular hydrogen by up to a factor of $\sim 10$, compared to the equilibrium value for the ideal gas. This increases the $\rm H_{2}-He$ CIA opacity by an order of magnitude and will affect the determination of the abundance of hydrogen in very cool, helium-rich white dwarfs.
description: 9 pages, 5 figures, 1 table; Accepted for publication in The Astrophysical Journal
ECONOMIC DEVELOPMENT, INSTITUTIONAL CHANGE, AND THE POLITICAL ECONOMY OF AGRICULTURAL PROTECTION: AN ECONOMETRIC STUDY OF BELGIUM SINCE THE 19TH CENTURY
Creators: name: Swinnen, Johan F.M.
name: Banerjee, Anurag N.
name: De Gorter, Harry
name: Swinnen, Johan F.M.
name: Banerjee, Anurag N.
name: De Gorter, Harry
Publisher: name: Unknown
Year: 2000
Subjects: Agricultural and Food Policy
Industrial Organization

description: This empirical study uses one hundred years of annual data on eleven agricultural commodities from Belgium to measure the impact of structural changes coinciding with economic development and changes in political institutions on agricultural protection. The analysis shows that changes in agricultural protection are caused by a combination of factors. Governments have increased protection and support to farmers when world market prices for their commodities fell, and vice versa, offsetting market effects on producer incomes. Other economic determinants were the share of the commodities in total consumer expenditures (negative effect) and in total output of the economy (positive effect). With Belgium a small economy, there was no impact of the trade position. Some changes in political institutions have affected agricultural protection. Democratic reforms which induced a significant shift in the political balance towards agricultural interests, such as the introduction of the one- man- one- vote system, led to an increase in agricultural protection. The integration of Belgian agricultural policies in the Common Agricultural Policy in 1968 coincided with an increase in protection, ceteris paribus. Both institutional factors, related to changes in access to and information about the decision- making at the EU level, and structural changes in the Belgian agricultural and food economy may explain this effect.
A RE-EXAMINATION OF EXCESS SENSITIVITY PUZZLE WHEN CONSUMERS FORECAST THE INCOME PROCESS
Creators: name: Banerjee, Anurag N.
name: Basu, Parantap
name: Banerjee, Anurag N.
name: Basu, Parantap
Publisher: name: Unknown
Year: 1998
Subjects: Consumer/Household Economics

description: In this paper, we address the issue of excess sensitivity/ smoothness of consumption purely from an estimation and forecasting point of view. Suppose the agent estimates the income process using the past income data and obtains best linear unbiased forecasts of future income and then she computes permanent income using these forecasts. How far will she be if she misspecies the income process as a trend stationary process when truly it is diference stationary? Using the recently developed sensitivity indices for forecasts, we argue that for a plausible characterization of the deterministic trend term in the income process, the mispecication bias for estimate of marginal propensity to consume is of second order importance.
CAUSES OF OUTPUT DECLINE IN ECONOMIC TRANSITION: THE CASE OF CENTRAL AND EASTERN EUROPEAN AGRICULTURE
Creators: name: Macours, Karen
name: Swinnen, Johan F.M.
name: Macours, Karen
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 1997
Subjects: Agricultural and Food Policy
Production Economics

description: This paper quantifies the relative importance of the different causal factors of the changes in agricultural production in Central and Eastern Europe since 1989 using a production function and supply response approach. The analyses show that the deterioration of the agricultural terms of trade explains a considerable part (40 to 45 %) of the production change. The effects of the extreme weather conditions that coincided with the reforms explain 10 % to 20 % of the output decline, where as the transition uncertainty accounts for 10 % to 15 %. The shift of the production to family farms caused a productivity increase due to improved labor effort but the process of disruption of the production structures caused a (temporary) negative effect. The net effect of the restructuring was slightly positive. Privatization had a strong negative effect on the output. In Albania, Bulgaria and Romania this effect was due to declined technical eficiency. In contrast, factor productivity increases in the Czech Republic, Slovakia and Hungary completely offset this effect. The negative privatization effect in these countries was largely due to factor adjustment (mainly labor shedding), i.e. improvements in allocative efficiency. Finally, our analyses suggest that up to 25% of the output decline may be a statistical phenomenon.
DETERMINANTS OF AGRICULTURAL PROTECTION IN FINLAND (1931-1990)
Creators: name: Crommelynck, Anja
name: Kola, Jukka
name: Swinnen, Johan F.M.
name: Crommelynck, Anja
name: Kola, Jukka
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 1998
Subjects: Agricultural and Food Policy

description: This study analyzes the determinants of changes in Finnish agricultural protection and investigates a series of theoretical hypotheses concerning the determinants of agricultural protection. Our empirical econometric analysis uses annual data from 1931 to 1990 for 9 agricultural commodities. The results support the hypotheses that changes in agricultural protection are induced by changes in the structure of the economy which affect the distribution and the size of costs and benefits of protection. Variables that measure the impact of those changes, such as relative income in agriculture, the share of farmers in the employment, the share of food in total consumers expenditure, and the self sufficiency rate, are found to be empirically important.
A Hamiltonian functional for the linearized Einstein vacuum field equations
Creators: name: Rosas-Rodriguez, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By considering the Einstein vacuum field equations linearized about the Minkowski metric, the evolution equations for the gauge-invariant quantities characterizing the gravitational field are written in a Hamiltonian form by using a conserved functional as Hamiltonian; this Hamiltonian is not the analog of the energy of the field. A Poisson bracket between functionals of the field, compatible with the constraints satisfied by the field variables, is obtained. The generator of spatial translations associated with such bracket is also obtained.
description: 5 pages, accepted in J. Phys.: Conf. Series
LAND MARKETS IN TRANSITION: THEORY AND EVIDENCE FROM HUNGARY
Creators: name: Vranken, Liesbet
name: Swinnen, Johan F.M.
name: Vranken, Liesbet
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 2003
Subjects: Industrial Organization
Land Economics/Use

description: This paper analyses the determinants of household farms' participation in land markets in transition countries. We derive several hypotheses on the impact of households' management ability, land endowment, land quality and prices, transaction costs in the land market, rural credit and labour market constraints. We test the hypotheses combining a representative dataset on land rental activities of more than 1,400 Hungarian household farms with data from the Hungarian Central Statistical Office. We find that land rental markets reallocate land to households with better farm management capacities and less endowed with land. Households combine buying and renting of land to extend their farms. The continued domination of large farm organizations in some regions restricts household's access to land. Rural credit and labour market imperfections have an important impact on land rental markets.
Spin Nematic Phase in S=1 Triangular Antiferromagnets
Creators: name: Tsunetsugu, Hirokazu
name: Arikawa, Mitsuhiro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin nematic order is investigated for a S=1 spin model on triangular lattice with bilinear-biquadratic interactions. We particularly studied an antiferro nematic order phase with three-sublattice structure, and magnetic properties are calculated at zero temperature by means of bosonization. Two types of bosonic excitations are found. One is a gapless excitation with linear energy dispersion around $k \sim 0$, and this leads to a finite spin susceptibility at T=0 and would have a specific heat $C(T) \sim T^2$ at low temperatures. These behaviors can explain many of characteristic features of recently discovered spin liquid state in the triangular magnet, NiGa2S4.
FINANCE, INVESTMENTS AND RESTRUCTURING IN POLISH AGRICULTURE
Creators: name: Dries, Liesbeth
name: Swinnen, Johan F.M.
name: Dries, Liesbeth
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural and Food Policy
Agricultural Finance

description: This paper studies agricultural investments and financing in Polish agriculture, with emphasis on the dairy sector. Agriculture, predominantly on small farms, remains a dominant sector in Polish rural areas. Dairy plays an important role since many of the small farms have at least some milk production. The paper combines insights from other studies with conclusions from a study on financing and investment in the Polish dairy sector. Specifically, dairy farms and dairy companies in northern Poland have been surveyed to analyze who has made investments and to what extent their investments have been financed by loans from banks or via trade credit from dairy companies.
Testing the massive disk scenario for IRAS 18089-1732
Creators: name: Beuther, H.
name: Zhang, Q.
name: Sridharan, T. K.
name: Chen, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Investigating in more detail the previously suggested massive disk scenario for the High-Mass Protostellar Object IRAS18089-1732, we observed the source in the 860mum band with the Submillimeter Array in various spectral lines and the submm continuum emission at (sub-)arcsecond spatial resolution. Fifty spectral lines from eighteen different species spanning upper level energy states between 17 and 747K were detected. One of the assumed best tracers for massive disks, CH3CN, is optically thick and does not allow a further disk investigation. However, the complex molecule HCOOCH3 appears optically thin and exhibits a velocity shift across the central core perpendicular to the emanating outflow. Assuming equilibrium between centrifugal and gravitational force, the estimated mass for this rotating structure is 16/(sin2(i))Msun (with i the unknown inclination angle), of the same order as the gas mass derived from the continuum emission. A temperature estimate based on the CH3CN(19--18) K-ladder results in ~350K, thus a hot core has already formed in this region. An analysis of the submm continuum emission reveals even at this high spatial resolution only one isolated massive dust core without any detectable companions down to mass limits between 0.2 and 3Msun (depending on the assumed temperature). Potential implications for the massive cluster formation are discussed.
description: Accepted by the Astrophysical Journal
Ochterus barberi Schell 1943
Creators: name: Kment, Petr
name: Carapezza, Attilio
name: Jindra, Zdeněk
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Ochteridae
Ochterus
Ochterus barberi

description: Ochterus barberi Schell, 1943
 Ochterus barberi Schell, 1943a: 32, 35 (key to species, illustration). LECTOTYPE (designated by SCHELL 1943b: 42, as holotype):, USA: Arizona: ‘ Colorado Canyon’ [= Grand Canyon of Colorado River] (USNM).
 Ochterus barberi: SCHELL (1943b): 41 –42 (original description, differential diagnosis); DRAKE (1952): 74 (checklist); MENKE (1979): 125 (distribution, illustration); POLHEMUS & POLHEMUS (1988a): 542 (catalogue); POLHEMUS (1992b): 442 (note on type labels); HECKMAN (2011): 287, 463 (key to species, illustration); POLHEMUS & POLHEMUS (2016): 17, 30–33 (key to species, redescription, illustrations).
  Distribution. Nearctic Region:  USA: Arizona (SCHELL 1943b; DRAKE 1952; POLHEMUS 1973; POLHEMUS & POLHEMUS 1976, 1988a, 2016; STEVENS & POLHEMUS 2008), California (MENKE 1979; POLHEMUS & POLHEMUS 1988a, 2016), Colorado (POLHEMUS & POLHEMUS 2016), New Mexico (DRAKE 1952; POLHEMUS 1973; POLHEMUS & POLHEMUS 1988a, 2016); Mexico: Sonora (POLHEMUS & POLHEMUS 1988a, 2016).
 Note. SCHELL (1943b) also listed paratypes [actually paralectotypes] from Orizaba, in the Mexican state of Veracruz, but these specimens have proven on closer examination to represent females of O. aeneifrons (POLHEMUS & POLHEMUS 2016).
 The revision of American Ochterus including the description of O. barberi was published divided in two parts, first published in January 1943 (SCHELL 1943a) and second in April 1943 (SCHELL 1943b). The species was first introduced in the key, which is sufficient to make it available (ICZN 1999: Art. 13.1.1), without any mention of type specimens (SCHELL 1943a: 32), while the original description including the holotype designation appeared in the second part (SCHELL 1943b: 41). As a holotype is defined as ‘the single specimen upon which a new nominal species-group taxon is based in the original publication’ (ICZN 1999: Art. 73.1), in this case, the subsequently designated ‘holotype’ must be considered the lectotype according to ICZN (1999: Art. 74.5).
description: Published as part of Kment, Petr, Carapezza, Attilio & Jindra, Zdeněk, 2020, Taxonomic catalogue of the family Ochteridae with description of Ochterus papaceki sp. nov. from Socotra Island and Tanzania (Hemiptera: Heteroptera), pp. 23-64 in Acta Entomologica Musei Nationalis Pragae 60 (1) on page 35, DOI: 10.37520/aemnp.2020.003, http://zenodo.org/record/3879659
Finite-temperature Simulations for Magnetic Nanostructures
Creators: name: Novotny, M. A.
name: Robb, D. T.
name: Stinnett, S. M.
name: Brown, G.
name: Rikvold, P. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine different models and methods for studying finite-temperature magnetic hysteresis in nanoparticles and ultrathin films. This includes micromagnetic results for the hysteresis of a single magnetic nanoparticle which is misaligned with respect to the magnetic field. We present results from both a representation of the particle as a one-dimensional array of magnetic rotors, and from full micromagnetic simulations. The results are compared with the Stoner-Wohlfarth model. Results of kinetic Monte Carlo simulations of ultrathin films are also presented. In addition, we discuss other topics of current interest in the modeling of magnetic hysteresis in nanostructures, including kinetic Monte Carlo simulations of dynamic phase transitions and First-Order Reversal Curves.
description: 13 pages, 9 figures; v2: updated to include most recent work (with references)
Simulating COVID-19 in a University Environment
Creators: name: Gressman, Philip T.
name: Peck, Jennifer R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Multiagent Systems (cs.MA)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Residential colleges and universities face unique challenges in providing in-person instruction during the COVID-19 pandemic. Administrators are currently faced with decisions about whether to open during the pandemic and what modifications of their normal operations might be necessary to protect students, faculty and staff. There is little information, however, on what measures are likely to be most effective and whether existing interventions could contain the spread of an outbreak on campus. We develop a full-scale stochastic agent-based model to determine whether in-person instruction could safely continue during the pandemic and evaluate the necessity of various interventions. Simulation results indicate that large scale randomized testing, contact-tracing, and quarantining are important components of a successful strategy for containing campus outbreaks. High test specificity is critical for keeping the size of the quarantine population manageable. Moving the largest classes online is also crucial for controlling both the size of outbreaks and the number of students in quarantine. Increased residential exposure can significantly impact the size of an outbreak, but it is likely more important to control non-residential social exposure among students. Finally, necessarily high quarantine rates even in controlled outbreaks imply significant absenteeism, indicating a need to plan for remote instruction of quarantined students.
description: 30 pages, 9 figures; fixed minor typos and rephrased some unclear points
Stationary or static space-times and Young tableaux
Creators: name: Fiedler, Bernd
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: Symbolic Computation (cs.SC)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: 53B20; 83C20; 05E10; 16D60; 05-04

description: Algebraic curvature tensors possess generators which can be formed from symmetric or alternating tensors S, A or tensors θwith an irreducible (2,1)-symmetry. In differential geometry examples of curvature formulas are known which contain generators on the basis of S or A realized by differentiable tensor fields in a natural way. We show that certain curvature formulas for stationary or static space-times contain such differentiable realizations of generators based on θ. The tensor θis connected with the timelike Killing vector field of the space-time. θlies in a special symmetry class from the infinite family of irreducible (2,1)-symmetry classes. We determine characteristics of this class. In particular, this class allows a maximal reduction of the length of the curvature formulas. We use a projection formalism by Vladimirov, Young symmetrizers and Littlewood-Richardson products. Computer calculations were carried out by means of the packages Ricci and PERMS.
description: 11 pages
THE ECONOMICS OF AGRICULTURAL DECOLLECTIVIZATION IN EAST CENTRAL EUROPE AND THE FORMER SOVIET UNION
Creators: name: Mathijs, Erik
name: Swinnen, Johan F.M.
name: Mathijs, Erik
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 1997
Subjects: Agricultural and Food Policy
Industrial Organization

description: The break-up of large-scale agricultural production units into individually operated farms differs considerably across East Central Europe and the Former Soviet Union. Large-scale successor organizations to the former state and collective farms still dominate in Slovakia, Hungary, the Czech Republic, and in most states of the Former Soviet Union. In Albania, Armenia, and Latvia, a massive break-up of the collective farms resulted in a domination of smaller scale individual farms. Also within countries there exist wide variations in the decollectivization process between different regions and agricultural subsectors. We develop an economic model of decollectivization to explain these variations and derive a series of propositions regarding factors affecting the decollectivization process. Our empirical analysis presents correlations between decollectivization and our explanatory variables. Specifically, they suggest the importance of relative productivity, factor intensity and privatization and decollectivization procedures in explaining decollectivization differences between countries.
Reinvestigation of the intrinsic magnetic properties of (Fe$_{1-x}$Co$_x$)$_2$B alloys and crystallization behavior of ribbons
Creators: name: Lamichhane, Tej Nath
name: Palasyuk, Olena
name: Antropov, Vladimir P.
name: Zhuravlev, Ivan A.
name: Belashchenko, Kirill D.
name: Nlebedim, Ikenna C.
name: Dennis, Kevin W.
name: Jesche, Anton
name: Kramer, Matthew J.
name: Bud'ko, Sergey L.
name: McCallum, R. William
name: Canfield, Paul C.
name: Taufour, Valentin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: New determination of the magnetic anisotropy from single crystals of (Fe$_{1-x}$Co$_x$)$_2$B alloys are presented. The anomalous temperature dependence of the anisotropy constant is discussed using the standard Callen-Callen theory, which is shown to be insufficient to explain the experimental results. A more material specific study using first-principles calculations with disordered moments approach gives a much more consistent interpretation of the experimental data. Since the intrinsic properties of the alloys with $x=0.3-0.35$ are promising for permanent magnets applications, initial investigation of the extrinsic properties are described, in particular the crystallization of melt spun ribbons with Cu, Al, and Ti additions. Previous attempts at developing a significant hysteresis have been unsuccessful in this system. Our melt-spinning experiment indicates that this system shows rapid crystallization.
Gerhard May, Schöpfung aus dem Nichts
Creators: name: Davids, Α.
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
AN EXPLANATION OF LAND REFORM CHOICES IN CENTRAL AND EASTERN EUROPE
Creators: name: Swinnen, Johan F.M.
name: Swinnen, Johan F.M.
Publisher: name: Unknown
Year: 1997
Subjects: Agricultural and Food Policy
International Development

description: In all Central and East European countries (CEECs) land reform was a key part of the overall agrarian reforms. Various land reform procedures have been chosen and the selected procedures were not the most efficient ones in several cases. The efficiency and distributional impacts depend on the privatization and land reform process. The paper therefore explains the choice of the land reform processes by analyzing their efficiency and distributional effects -- and how they differ between CEECs. It starts with an overview of the post-1989 land reforms in CEECs. The second section discusses the most efficient reform processes and compares these with the effectively chosen processes, identifying in which cases governments clearly have not chosen efficient land reforms. The third part indicates several key factors which have constrained CEEC governments in their choice of the land reform procedures and which have caused the choice of inefficient land reform process. Key factors are the history of the land ownership, including the postcollectivization ownership status, the ethnicity of precollectivization owners, and the equality of precollectivization asset distribution. These factors affect the distributional implications of the land reform, the (potential) conflict between efficiency, equity historical justice, and thus the political economy equilibrium. The last sections discuss two important issues in the CEEC land reforms: compensation of those who do not benefit from the reforms and the impact on effective property rights.
Evidence for Granulation and Oscillations in Procyon from Photometry with the WIRE satellite
Creators: name: Bruntt, H.
name: Kjeldsen, H.
name: Buzasi, D. L.
name: Bedding, T. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report evidence for the granulation signal in the star Procyon A, based on two photometric time series from the star tracker on the WIRE satellite. The power spectra show evidence of excess power around 1 milliHz, consistent with the detection of p-modes reported from radial velocity measurements. We see a significant increase in the noise level below 3 milliHz, which we interpret as the granulation signal. We have made a large set of numerical simulations to constrain the amplitude and timescale of the granulation signal and the amplitude of the oscillations. We find that the timescale for granulation is T(gran) = 750(200) s, the granulation amplitude is 1.8(0.3) times solar, and the amplitude of the p-modes is 8(3) ppm. We found the distribution of peak heights in the observed power spectra to be consistent with that expected from p-mode oscillations. However, the quality of the data is not sufficient to measure the large separation or detect a comb-like structure, as seen in the p-modes of the Sun. Comparison with the recent negative result from the MOST satellite reveal that the MOST data must have an additional noise source that prevented the detection of oscillations.
description: 23 pages, 12 figures, submitted to ApJ; v2 revisions: one reference corrected and a comment in Figure 7 corrected
Spin Transport Properties in Heisenberg Antiferromagnetic Spin Chains: Spin Current induced by Twisted Boundary Magnetic Fields
Creators: name: Zhuo, Wei
name: Wang, Xiaoqun
name: Wang, Yupeng
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin transport properties of the one-dimensional Heisenberg antiferromagnetic spin systems for both $S=1/2$ and S=1 are studied by applying twisted boundary magnetic field. The spin current displays significantly different behavior of the spin transport properties between $S=1/2$ and S=1 cases. For the spin-half case, a London equation for the current and the detection of an alternating electric field are proposed for the linear response regime. The correlation functions reveal the spiral nature of spin configuration for both ground state and the spinon excitations. For the spin-one chain otherwise, a kink is generated in the ground state for the size is larger than the correlation length, leading to an exponential dependence of spin current with respect to the chains length. The midgap state emerges from the degenerate ground state even for small boundary fields.
description: 4 pages, 5 figures
Azimuthal correlations of high-pT photons and hadrons in Au+Au collisions at RHIC
Creators: name: Dietel, Thomas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The measurement of gamma+jet events with a direct photon in coincidence with an energetic parton can provide unique insights into the propagation and fragmentation of the parton in the presence of the hot and dense medium created in heavy-ion collisions. One way to explore these effects is the study of azimuthal correlations between the direct photon and hadrons produced in the fragmentation. We present azimuthal correlations between photons with a transverse momentum of more than 10 GeV and charged hadrons with a transverse momentum of more than 2 GeV in Au+Au collisions at sqrt(s_NN) = 200 GeV that have been measured with the STAR detector at RHIC. The separation of correlations with direct photons and photons from hadronic decays will be discussed.
description: Talk given at Quark Matter 2005, 18th International Conference on Nucleus-Nucleus Interactions, August 4-9, 2005, Budapest, Hungary. 4 pages, 5 figures
Two Views of the Radius Gap and the Role of Light Curve Fitting
Creators: name: Petigura, Erik A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recently, several groups have resolved a gap that bifurcates planets between the size of Earth and Neptune into two populations. The location and depth of this feature is an important signature of the physical processes that form and sculpt planets. In particular, planets residing in the radius gap are valuable probes of these processes as they may be undergoing the final stages of envelope loss. Here, we discuss two views of the radius gap by Fulton & Petigura (2018; F18) and Van Eylen et al. (2018; V18). In V18, the gap is wider and more devoid of planets. This is due, in part, to V18's more precise measurements of planet radius $R_p$. Thanks to Gaia, uncertainties in stellar radii Rstar are no longer the limiting uncertainties in determining $R_p$ for the majority of Kepler planets; instead, errors in $R_p/R_\star$ dominate. V18's analysis incorporated short-cadence photometry along with constraints on mean stelar density that enabled more accurate determinations of $R_p/R_\star$. In the F18 analysis, less accurate $R_p/R_\star$ blurs the boundary the radius gap. The differences in $R_p/R_\star$ are largest at high impact parameter ($b \gtrsim 0.8$) and often exceed 10%. This motivates excluding high-$b$ planets from demographic studies, but identifying such planets from long-cadence photometry alone is challenging. We show that transit duration can serve as an effective proxy, and we leverage this information to enhance the contrast between the super-Earth and sub-Neptune populations.
description: 13 pages, 10 figures, accepted for publication in AJ
RR Lyrae variables in Galactic globular clusters V. The case of M3 pulsators
Creators: name: Castellani, M.
name: Castellani, V.
name: Cassisi, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use our synthetic Horizontal Branch (HB) procedure to approach the debated problem concerning the adequacy of canonical HB stellar models to account for the observed peaked distribution of RR Lyrae fundamentalised periods in the globular cluster M3. We find that by assuming a suitable bimodal mass distribution, canonical models account for the observed period distribution. In particular, the best fit model, out of nine random extractions, reaches a 99.9% Kolmogorov-Smirnov (KS) probability. We also attempt a prediction of the relative distribution of variables in fundamental and first overtone pulsators, reaching a rather satisfactory agreement. However, one finds that canonical models outnumber by roughly a factor of two the observed number of red HB stars. Possible solutions for this discrepancy are outlined. Alternative evolutionary scenarios are also briefly discussed.
description: Accepted for publication in Astronomy & Astrophysics, 6 pages, 4 figures
QCD Effective Field Theories for Heavy Quarkonium
Creators: name: Brambilla, N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: QCD nonrelativistic effective field theories (NREFT) are the modern and most suitable frame to describe heavy quarkonium properties. Here I summarize few relevant concepts and some of the interesting physical applications (spectrum, decays, production) of NREFT.
description: Invited plenary talk at the XI International Conference on Hadron Spectroscopy-Hadron05, Rio De Janeiro, 21-26 August 2006. 10 pages, 1 figure
AGN dichotomy beyond radio loudness: a Gaussian Mixture Model analysis
Creators: name: Beaklini, Pedro P. B.
name: Quadros, Allan V. C.
name: de Avellar, Marcio G. B.
name: Dantas, Maria L. L.
name: Cançado, André L. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Since the discovery of Quasi-stellar Objects (QSOs), also known as quasars, they have been traditionally subdivided as radio-loud and radio-quiet sources. Whether such division is a misleading effect from a highly heterogeneous single population of objects, or real has yet to be answered. Such dichotomy has been evidenced by observations of the flux ratio between the optical and radio emissions (usually $B$-band and 5 GHz). Evidence of two populations in quasars and samples of a wide diversity of AGNs has been accumulated over the years. Other quantities beyond radio loudness also seem to show the signature of the existence of two different populations of AGN. To verify the existence of a dichotomy through different parameters, we employed a soft clustering scheme, based on the Gaussian Mixture Model (GMM), to classify these objects simultaneously using the following parameters: black hole mass, colour and $R$ loudness index, as well as the usual radio and $B$-band luminosity. To investigate whether different kinds of AGNs manifest any population dichotomy, we applied GMM to four independent catalogues composed of both optical and radio information. Our results indicate the persistence of a dichotomy in all datasets, although the discriminating power differs for different choices of parameters. Although the Radio Loudness parameter alone does not seem to be enough to display the dichotomy, the evidence of two populations of AGNs could persist even if we consider other parameters. Our research suggests that the dichotomy is not a misleading effect but real.
description: Accepted on MNRASS, 13 pages, 6 figures
Ochterus barrosoi Gapud 1981
Creators: name: Kment, Petr
name: Carapezza, Attilio
name: Jindra, Zdeněk
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Ochteridae
Ochterus
Ochterus barrosoi

description: Ochterus barrosoi Gapud, 1981
 Ochterus barrosoi Gapud, 1981: 305– 307 –309 (description, differential diagnosis, illustrations). HOLOTYPE:, Philippines: Leyte:‘ Calbiga-a River, Mt Pangasugan’ (UPLB).
 Ochterus barrosoi: GAPUD (1981): 107 (checklist); CHEN et al. (2005): 413 (checklist).
  Distribution. Oriental Region:  Philippines: Leyte (GAPUD 1981).
description: Published as part of Kment, Petr, Carapezza, Attilio & Jindra, Zdeněk, 2020, Taxonomic catalogue of the family Ochteridae with description of Ochterus papaceki sp. nov. from Socotra Island and Tanzania (Hemiptera: Heteroptera), pp. 23-64 in Acta Entomologica Musei Nationalis Pragae 60 (1) on page 35, DOI: 10.37520/aemnp.2020.003, http://zenodo.org/record/3879659
Vetera Christianorum 15 (1978), Fasz. 1 und 2, und: Antonio Quacquarelli, La società cristologica prima di Costantino e i reflessinelle arti figurative
Creators: name: Davids, A.
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
The Global Dimension of Schur Algebras for GL_2 and GL_3
Creators: name: Parker, Alison E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Representation Theory (math.RT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16G99, 20G05, 20G10, 20G42

description: We first define the notion of good filtration dimension and Weyl filtration dimension in a quasi-hereditary algebra. We calculate these dimensions explicitly for all irreducible modules in SL_2 and SL_3. We use these to show that the global dimension of a Schur algebra for GL_2 and GL_3 is twice the good filtration dimension. To do this for SL_3, we give an explicit filtration of the modules \nabla(λ) by modules of the form \nabla(μ)^F \otimes L(ν) where μis a dominant weight and νis p-restricted.
description: uses xypic v 3.7 and amsart v. 2.08. 1 figure, 32 pages
Probing vestibular contributions during dynamic locomotor tasks using the techniqe of galvanic vestibular stimulation
Creators: name: Bent, Leah Rachel
Publisher: name: University of British Columbia
Year: 2009

description: Assessment of the vestibular system, its function and contribution to movement control during locomotor tasks in humans, has been examined in the past using various techniques, and only very recently using Galvanic Vestibular Stimulation (GVS). Studies utilizing GVS have indicated that vestibular information may have a larger role during dynamic tasks, such as locomotion, than during quiet standing. However, the nature of vestibular contributions and their timing during dynamic tasks have not been addressed. The current thesis examines vestibular contributions during specific dynamic tasks. The purpose was to determine if vestibular information was more heavily weighted at specific times during these dynamic tasks, and based on those findings address the possible roles that vestibular information has in successful task completion. Four studies were conducted that examined vestibular contributions in forward walking, step initiation, gait initiation and steady-state locomotion. Binaural bipolar GVS was delivered at specific times to probe the presence of vestibular contributions. The results of the four studies collectively contributed to four main conclusions. First, vestibular information has greater sensory weighting during the more dynamic phases of a task, even in the presence of vision. Second, the magnitude of the response is dependent on both the magnitude of the vestibular perturbation and the phase in the gait cycle at which the stimulation is delivered during the task. Third, the vestibular contribution during locomotor tasks has different roles, and is therefore differentially modulated, in the control of upper body versus lower limb movement. Finally, the up-regulation of vestibular information for the control of lower limb movement demonstrates gait phase dependency, which is greatest during double support in the gait cycle. To date, such a conclusion of phase related vestibular modulation has not been reached in any locomotor task examining vestibular contributions in humans. The observation of greatest vestibular up-regulation during double support leads to the postulation that vestibular information is important for the purpose of assessing the success of postural strategies during locomotion, as well as providing information on body position to facilitate programming of limb trajectory during locomotor tasks.
An Insurance Contract Design to Boost Storage Participation in the Electricity Market
Creators: name: Aguiar, Nayara
name: Gupta, Vijay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Energy storage technologies are key to improving grid flexibility in the presence of increasing amounts of intermittent renewable generation. We propose an insurance contract that suitably compensates energy storage systems for providing flexibility. Such a contract provides a wider range of market opportunities for these systems while also incentivizing higher renewable penetration in the grid. We consider a day-ahead market in which generators, including renewables and storage owners, bid to be scheduled for the next operating day. Due to production uncertainty, renewable generators may be unable to meet their day-ahead production schedule, and thus be subject to a penalty. As a hedge against these penalties, we propose an insurance contract between a renewable producer and a storage owner, in which the storage reserves some energy to be used in case of renewable shortfalls. We show that such a contract incentivizes the renewable player to bid higher, thus increasing renewable participation in the electricity mix. It also provides an extra source of revenue for storage owners that may not be profitable with a purely arbitrage-based strategy in the day-ahead market. Further, we prove this contract is economically beneficial for both players. We validate our analysis through two case studies.
Nonperturbative renomalization group for Einstein gravity with matter
Creators: name: Granda, L. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: we investigate the exact renormalization group (RG) in Einstein gravity coupled to N-component scalar field, working in the effective average action formalism and background field method. The truncated evolution equation is obtained for the Newtonian and cosmological constants. We have shown that screening or antiscreening behaviour of the gravitational coupling depends cricially on the choice of scalar-gravitational $ξ$ and the number of scalar fields.
description: 7 pages, LaTeX, a few typos corrected
Solving Pure Yang Mills in 2+1 Dimensions
Creators: name: Leigh, Robert G.
name: Minic, Djordje
name: Yelnikov, Alexandr
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analytically compute the spectrum of the spin zero glueballs in the planar limit of pure Yang-Mills theory in 2+1 dimensions. The new ingredient is provided by our computation of a new non-trivial form of the ground state wave-functional. The mass spectrum of the theory is determined by the zeroes of Bessel functions, and the agreement with large N lattice data is excellent.
description: 4 page letter; version to appear in Physical Review Letters