cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reconstruction of quintessence field for the THDE with swampland correspondence in $f(R,T)$ gravity
Creators: name: Sharma, Umesh Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In the present work, we construct the Tsallis holographic quintessence model of dark energy in $f(R, T)$ gravity with Hubble horizon as IR cut-off. In a flat FRW background, the correspondence among the energy density of the quintessence model with the Tsallis holographic density permits the reconstruction of the dynamics and the potentials for the quintessence field. The suggested Hubble horizon infrared cut-off for the THDE density acts for two specific cases: (i) THDE 1 and (ii) THDE 2. We have reconstructed the Tsallis holographic quintessence model in the region $ω_Λ > -1$ for the EoS parameter for both the cases. In addition, the quintessence phase of the THDE models is analyzed with swampland conjecture to describe the accelerated expansion of the Universe.
description: 22 pages, 10 figures
MPEC 2024-A159 : 2024 AD4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AD4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Metallic Hydrogen Sublattice and Proton Mobility in Copper Hydride at High Pressure
Creators: name: Meier, Thomas
name: Trybel, Florian
name: Criniti, Giacomo
name: Laniel, Dominique
name: Khandarkhaeva, Saiana
name: Koemets, Egor
name: Fedotenko, Timofey
name: Glazyrin, Konstantin
name: Hanfland, Michael
name: Steinle-Neumann, Gerd
name: Dubrovinskaia, Natalia
name: Dubrovinsky, Leonid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Atomic and electronic structures of Cu2H and CuH have been investigated by high pressure NMR spectroscopy, X-ray diffraction and ab-initio calculations. Metallic Cu2H was synthesized at a pressure of 40 GPa, and semi-metallic CuH at 90 GPa, found stable up to 160 GPa. Experiments and computations suggest the formation of a metallic 1H-sublattice as well as a high 1H mobility of ~10-7 cm2/s in Cu2H. Comparison of Cu2H and FeH data suggests that deviations from Fermi gas behavior, formation of conductive hydrogen networks, and high 1H mobility could be common features of metal hydrides.
The Coming Tug of War: Forces Moving the 2007 Farm Bill
Creators: name: Young, Robert E.
name: Young, Robert E.
Publisher: name: Unknown
Year: 2006
Subjects: Agricultural and Food Policy
Environmental Economics and Policy
Health Economics and Policy
International Relations/Trade

description: The main forces of trade agreements and budgets will certainly play a strong role in driving the 2007 farm bill debate. Other factors ranging from the political makeup of Congress to the growing level of rhetoric calling for reform, from the cost-price squeeze facing producers to the emergence of nonprogram commodities at the table will also play, at this time, uncertain roles in the development of the final legislation. These various forces and factors are assessed and projections as to the final outcome of the debate hesitatingly provided.
Ultimate limits for multiple quantum channel discrimination
Creators: name: Zhuang, Quntao
name: Pirandola, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistics Theory (math.ST)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Quantum hypothesis testing is a central task in the entire field of quantum information theory. Understanding its ultimate limits will give insight into a wide range of quantum protocols and applications, from sensing to communication. Although the limits of hypothesis testing between quantum states have been completely clarified by the pioneering works of Helstrom in the 70s, the more difficult problem of hypothesis testing with quantum channels, i.e., channel discrimination, is less understood. This is mainly due to the complications coming from the use of input entanglement and the possibility of employing adaptive strategies. In this paper, we establish a lower limit for the ultimate error probability affecting the discrimination of an arbitrary number of quantum channels. We also show that this lower bound is achievable when the channels have certain symmetries. As an example, we apply our results to the problem of channel position finding, where the goal is to identify the location of a target channel among multiple background channels. In this general setting, we find that the use of entanglement offers a great advantage over strategies without entanglement, with non-trivial implications for data readout, target detection and quantum spectroscopy.
description: 6+12 pages, 6 figures
How to ensure demonstration events are successful for knowledge exchange
Creators: name: Trivett, E
Publisher: name: Zenodo
Year: 2021
Subjects: DiverIMPACTS PA
Crop diversification

description: Problem:
 Researchers need to communicate better with farmers and advisors. Failure to do this limits the uptake of outcomes and restricts the legacy of research as well as its scope. It can also inhibit the on-farm application of research findings. Solution:
 Facilitating improved inter-sector communication through skills training in knowledge exchange and event coordination is essential. This can enhance the quality and quantity of research dissemination while influencing on-farm practices. Benefits:
 Better engagement and understanding between farmers, advisors and researchers can increase the practical application of research.
Agria mamillata
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sarcophagidae
Agria
Agria mamillata

description: Agria mamillata (PANDELLE, 1896)
Bgld, Winden, Zeilerberg, 26.5.17, 2 Ex.
Neu für Burgenland. Keine Fundangaben in FRANZ (1989).
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 792, DOI: 10.5281/zenodo.4004374
Quantum Epistemology from Mimicry and Ambiguity
Creators: name: Geurdes, Han
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In the paper we look into the epistemology of quantum theory. The starting point is the previously established mathematical ambiguity. The perspective of our study is the way that Schroedinger described Einstein s idea of physics epistemology. Namely, physical theory is a map with flags. Each flag must, according to Einstein in Schroedinger s representation, correspond to a physical reality and vice versa. With the ambiguity transformed to quantum-like operators we are able to mimic quantum theory. Therefore we have created little flags. The question is raised whether nature itself is ambiguous. The created flags point at ambiguous nature. Or, nature is not ambiguous and the ambiguity can be repaired in mathematics.
description: 11 pages. Axiomathes 2020
PMAS: The Potsdam Multi Aperture Spectrophotometer. II. The Wide Integral Field Unit PPak
Creators: name: Kelz, Andreas
name: Verheijen, Marc A. W.
name: Roth, Martin M.
name: Bauer, Svend M.
name: Becker, Thomas
name: Paschke, Jens
name: Popow, Emil
name: Sanchez, Sebastian F.
name: Laux, Uwe
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: PPak is a new fiber-based Integral Field Unit (IFU), developed at the Astrophysical Institute Potsdam, implemented as a module into the existing PMAS spectrograph. The purpose of PPak is to provide both an extended field-of-view with a large light collecting power for each spatial element, as well as an adequate spectral resolution. The PPak system consists of a fiber bundle with 331 object, 36 sky and 15 calibration fibers. The object and sky fibers collect the light from the focal plane behind a focal reducer lens. The object fibers of PPak, each 2.7 arcseconds in diameter, provide a contiguous hexagonal field-of-view of 74 times 64 arcseconds on the sky, with a filling factor of 60%. The operational wavelength range is from 400 to 900nm. The PPak-IFU, together with the PMAS spectrograph, are intended for the study of extended, low surface brightness objects, offering an optimization of total light-collecting power and spectral resolution. This paper describes the instrument design, the assembly, integration and tests, the commissioning and operational procedures, and presents the measured performance at the telescope.
description: 14 pages, 21 figures, accepted at PASP
Role of Disorder in Mn:GaAs, Cr:GaAs, and Cr:GaN
Creators: name: Xu, J. L.
name: van Schilfgaarde, M.
name: Samolyuk, G. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present calculations of magnetic exchange interactions and critical temperature T_c in Mn:GaAs, Cr:GaAs and Cr:GaN. The local spin density approximation is combined with a linear-response technique to map the magnetic energy onto a Heisenberg hamiltonion, but no significant further approximations are made. Special quasi-random structures in large unit cells are used to accurately model the disorder. T_c is computed using both a spin-dynamics approach and the cluster variation method developed for the classical Heisenberg model. We show the following: (i) configurational disorder results in large dispersions in the pairwise exchange interactions; (ii) the disorder strongly reduces T_c; (iii) clustering in the magnetic atoms, whose tendency is predicted from total-energy considerations, further reduces T_c. Additionally the exchange interactions J(R) are found to decay exponentially with distance R^3 on average; and the mean-field approximation is found to be a very poor predictor of T_c, particularly when J(R) decays rapidly. Finally the effect of spin-orbit coupling on T_c is considered. With all these factors taken into account, T_c is reasonably predicted by the local spin-density approximation in MnGaAs without the need to invoke compensation by donor impurities.
description: 10 pages, 3 figures
Subsurface Drip Irrigation Versus Center-Pivot Sprinkler for Applying Swine Effluent to Corn
Creators: name: Carreira, Rita I.
name: Stoecker, Arthur L.
name: Epplin, Francis M.
name: Hattey, Jeffory A.
name: Kizer, Michael A.
name: Carreira, Rita I.
name: Stoecker, Arthur L.
name: Epplin, Francis M.
name: Hattey, Jeffory A.
name: Kizer, Michael A.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Crop Production/Industries
subject: aquifer depletion
subject: center-pivot sprinkler irrigation
subject: certainty equivalent
subject: corn irrigation
subject: mathematical programming
subject: risk
subject: stochastic optimization
subject: subsurface drip irrigation

description: A risk-averse irrigated corn producer would be better off choosing the more expensive subsurface drip irrigation (SDI) over center-pivot sprinkler (CPS), given limited aquifer life and swine effluent and urea fertilization. A stochastic optimization using EPIC data maximized expected utility of 100 years' worth of net revenues for a quarter section. Phosphorus accumulation was more likely with the CPS than with the SDI but soil nitrogen was constant under both systems. SDI conserves more water than CPS per acre but depletes the aquifer faster because a greater area is irrigated. These results were invariant in the sensitivity analysis.
Blaesoxipha plumicornis
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sarcophagidae
Blaesoxipha
Blaesoxipha plumicornis

description: Blaesoxipha plumicornis (ZETTERSTEDT, 1859)
Bgld, Winden, Hackelsberg, 19.7.17; Zurndorf, NSG, 14.6.17.
Neu für Burgenland.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 792, DOI: 10.5281/zenodo.4004374
title: Arañando el escándalo. La representación de la pobreza en el cine clásico mexicano
Creators: name: Tuñon, Julia
Publisher: name: Savoirs en prisme
Year: 2012

description: La pobreza es, a no dudar, un tema delicado. Lo es porque se asocia directamente con situaciones de dolor, pero también porque el término abarca un amplio abanico de posibilidades y la podemos asociar desde con el olor amargo de la basura en los barrios pobres hasta con las pruebas, no carentes de glamour, con las que ¿Dios?, ¿el destino?, ¿la historia? mide a los seres humanos y que para algunos, como ciertos místicos, nutre la pureza del alma. Además permite discutir sobre los grados de dependencia física de los seres humanos (de comida, abrigo, vestido, descanso), pero también de sus repercusiones en las emociones, los afectos, los defectos y las virtudes, es decir, el tema atañe al viejo dilema de la humanidad como naturaleza o como cultura. Entender la pobreza no es simple, porque roza siempre temas éticos: sufrirla y/o no sufrirla, ¿nos hace mejores moralmente o nos arrastra en su deterioro?, ¿quiénes o qué son los culpables?
description: Savoirs en prisme, No. 01 (2012): Images et insularité
Universal Statistics of the Scattering Coefficient of Chaotic Microwave Cavities
Creators: name: Hemmady, Sameer
name: Zheng, Xing
name: Antonsen, Thomas M.
name: Ott, Edward
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the statistics of the scattering coefficient S of a chaotic microwave cavity coupled to a single port. We remove the non-universal effects of the coupling from the experimental S data using the radiation impedance obtained directly from the experiments. We thus obtain the normalized, complex scattering coefficient whose Probability Density Function (PDF) is predicted to be universal in that it depends only on the loss (quality factor) of the cavity. We compare experimental PDFs of the normalized scattering coefficients with those obtained from Random Matrix Theory (RMT), and find excellent agreement. The results apply to scattering measurements on any wave chaotic system.
description: 10 pages, 8 Figures, Fig.7 in Color, Submitted to Phys. Rev. E
The Capitalization of Wildlife Recreation Income into Farmland Values
Creators: name: Henderson, Jason R.
name: Moore, Sean
name: Henderson, Jason R.
name: Moore, Sean
Publisher: name: Unknown
Year: 2006
Subjects: subject: Land Economics/Use
subject: farmland values
subject: wildlife recreation

description: Wildlife recreation - hunting, fishing, and wildlife watching - appears to be an increasingly important pastime for many Americans. From 1991-2001, U.S. wildlife recreation expenditures surged from $77 billion to $108 billion in 2001 dollars. Land lease and ownership expenditures by wildlife recreation participants are also rising and appear to be capitalized into farmland values. This paper analyzes the impact of hunting lease rates on farmland values in Texas. The results indicate that counties with higher wildlife recreation income streams have higher land values.
Measurement of the neutron lifetime using a gravitational trap and a low-temperature Fomblin coating
Creators: name: Serebrov, A.
name: Varlamov, V.
name: Kharitonov, A.
name: Fomin, A.
name: Pokotilovski, Yu.
name: Geltenbort, P.
name: Butterworth, J.
name: Krasnoschekova, I.
name: Lasakov, M.
name: Taldaev, R.
name: Vassiljev, A.
name: Zherebtsov, O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present a new value for the neutron lifetime of 878.5 +- 0.7 stat. +- 0.3 syst. This result differs from the world average value (885.7 +- 0.8 s) by 6.5 standard deviations and by 5.6 standard deviations from the previous most precise result. However, this new value for the neutron lifetime together with a beta-asymmetry in neutron decay, Ao, of -0.1189(7) is in a good agreement with the Standard Model.
description: 11 pages, 9 figures; extended content with some corrections
On the Dirac oscillator in a spinning cosmic string spacetime in external magnetic fields: Investigation of energy spectrum and connection with the condensed matter physics
Creators: name: Cunha, Márcio M.
name: Dias, Henrique S.
name: Silva, Edilberto O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this article, we study topological and noninertial effects on the motion of the two-dimensional Dirac oscillator in the presence of a uniform magnetic field and the Aharonov-Bohm potential. We obtain the Dirac equation that describes the model. Expressions for the wave functions and energy spectrum are derived. The energy spectrum of the oscillator as a function of the various physical parameters involved in the problem is rigorously studied. Finally, we present some analogies between our results and others of the condensed matter physics.
Economic Analysis of Groundwater Markets in Central Dry Zone of Karnataka
Creators: name: Nagaraj, N.
name: Kumar, A.H. Suvarna
name: Chandrakanth, Mysore G.
name: Nagaraj, N.
name: Kumar, A.H. Suvarna
name: Chandrakanth, Mysore G.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Resource /Energy Economics and Policy
subject: water markets

description: Groundwater, unlike surface water, is expensive and relatively scarce and hence should be used to grow crops that are responsive to protective irrigation, require less water and are remunerative. Sellers and buyers of groundwater have put large areas under paddy, a water-intensive crop. This needs to be disciplined through effective groundwater institutions. Groundwater literacy has to be promoted by educating farmers on the pros and cons of overexploitation. For farmers who do not own wells, one way to enable access to water is through group investments in well irrigation. This would require provision for institutional credit for such groups and energization of pumpsets. This will provide an environment of sharing available groundwater and the associated costs. The functioning of groundwater markets in hard rock areas of the semi arid dry zone of Karnataka show two types of arrangements. In the first one, irrigation services are provided on demand and water charge is levied on hourly basis. In the second one, irrigation services are provided for the whole crop season, and cash equivalent of a fixed share of crop produce is paid as water charge. For water buyers, crop sharing arrangement yielded higher returns than that under hourly rates. Comparative analysis of allocative efficiencies of input use for sellers and buyers in groundwater markets show that water buyers obtain higher economic efficiency in water used for crop production than sellers, though both buyers and sellers are growing water-intensive crops such as paddy.
The Lithium Depletion Boundary in NGC 2547 as a test of pre-main-sequence evolutionary models
Creators: name: Jeffries, R. D.
name: Oliveira, J. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Intermediate resolution spectroscopy from the ESO Very Large Telescope is analysed for 63 photometrically selected low-mass (0.08-0.30 Msun) candidates of the open cluster NGC 2547. We have confirmed membership for most of these stars using radial velocities, and found that lithium remains undepleted for cluster stars with I>17.54+/-0.14 and K_{s}>14.86+/-0.12. From these results, several pre-main-sequence evolutionary models give almost model independent ages of 34-36 Myr, with a precision of 10 per cent. These ages are only slightly larger than the ages of 25-35 (+/-5) Myr obtained using the same models to fit isochrones to higher mass stars descending towards the zero age main sequence (ZAMS), both in empirically calibrated and theoretical colour-magnitude diagrams. This agreement between age determinations in different mass ranges is an excellent test of the current generation of low-mass pre-main sequence stellar models and lends confidence to ages determined with either method between 30 and 120 Myr.
description: Accepted for publication in MNRAS
Use of Spike Models in Measuring Consumers' Willingness to Pay for Non-GM Oil
Creators: name: Hu, Wuyang
name: Hu, Wuyang
Publisher: name: Unknown
Year: 2006
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Chinese consumers
subject: non-genetically modified oil
subject: spike models
subject: willingness to pay

description: In this paper, Chinese consumers' preferences and their willingness to pay (WTP) for non-genetically modified (GM) vegetable oil were elicited by a payment card approach. In addition to the conventional model, spike models, which were originally developed to evaluate public goods, were adopted in this paper. These spike models recognize the possibility of zero WTP and provide opportunities to analyze two correlated decision stages: whether to pay a premium for non-GM oil and how much the premium is. Results show that consumers behaved consistently in the two decision stages and there is a premium associated with non-GM oil.
Prevalence of exercise induced arterial hypoxemia in healthy females
Creators: name: Richards, Jennifer Clarke
Publisher: name: University of British Columbia
Year: 2009

description: Exercise induced arterial hypoxaemia (EIAH) is reported to occur in ~ 50% of highly trained male aerobic athletes. EIAH can have detrimental effects on athletic performance. Reversal of EIAH has been reported to increase maximal oxygen consumption (VO₂max) and endurance performance time in some subjects during heavy exercise. The number of investigations involving EIAH and females are small, and the results thus far are controversial. It has been reported that some females experience EIAH at a relatively lower fitness level compared to males, while other studies report that the prevalence in females is no different from that of males. Anatomical differences may predispose females to certain EIAH mechanisms, which may increase the prevalence of EIAH in this population. Expiratory flow limitation has been correlated to EIAH in women and may contribute to inspiratory muscle fatigue. Inspiratory muscle fatigue is reported to occur in males following heavy bouts of exercise, however, the relationship between EIAH and inspiratory muscle fatigue in women, had not been determined. The purpose of this investigation was to determine the prevalence of EIAH in females and observe any relationship between EIAH and inspiratory muscle fatigue. The prevalence of EIAH in women was determined in a large sample of females (n = 52, mean = 26.5 years) (VO₂max range: 28.0 - 61.3 ml/kg/min). It was hypothesized that EIAH would occur with a greater prevalence and relatively lower % VO₂max than previously reported in males. Prior to and following exercise, subjects performed a maximal inspiratory pressure (MIP) maneuver of the mouth, and handgrip strength test. The exercise test consisted of an incremental test (50 watts/2.5 min) to exhaustion (VO₂max) on an electronically braked cycle ergometer. End tidal CO₂ (PETCO₂) was recorded at each stage of the test. In this study, the prevalence of EIAH in women was slightly greater than that previously reported for males (67 %, n = 35). Hypoxaemic participants were grouped according to their degree of desaturation: mild EIAH SaO₂ = 94-92 % (n = 19),
Resonance energy and charge pumping through quantum SINIS contacts
Creators: name: Kopnin, N. B.
name: Mel'nikov, A. S.
name: Vinokur, V. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a mechanism of quantum pumping mediated by the spectral flow in a voltage-biased SINIS quantum junction and realized via the sequential closing of the minigaps in the energy spectrum in resonance with the Josephson frequency. We show that the dc current exhibits giant peaks at rational voltages.
Tunable exciton polaritons in biased bilayer graphene
Creators: name: Duarte, V. G. M.
name: Ninhos, P.
name: Tserkezis, C.
name: Mortensen, N. Asger
name: Peres, N. M. R.
name: Chaves, A. J.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: By harnessing the unique properties of bilayer graphene, we present a flexible platform for achieving electrically tunable exciton polaritons within a microcavity. Using a semiclassical approach, we solve Maxwell's equations within the cavity, approximating the optical conductivity of bilayer graphene through its excitonic response as described by the Elliott formula. Transitioning to a quantum mechanical framework, we diagonalize the Hamiltonian governing excitons and cavity photons, revealing the resulting polariton dispersions, Hopfield coefficients and Rabi splittings. Our analysis predicts that, under realistic exciton lifetimes, the exciton-photon interaction reaches the strong coupling regime. Furthermore, we explore the integration of an epsilon-near-zero material within the cavity, demonstrating that such a configuration can further enhance the light-matter interaction.
description: 13 pages, 5 figures, PRB Editor's suggestion
Evading Farm Support Reduction via Efficient Input Use: The Case of Greek Cotton Growers
Creators: name: Pantzios, Christos J.
name: Rozakis, Stelios
name: Tzouvelekas, Vangelis
name: Pantzios, Christos J.
name: Rozakis, Stelios
name: Tzouvelekas, Vangelis
Publisher: name: Unknown
Year: 2006
Subjects: subject: Production Economics
subject: co-responsibility levy
subject: cotton farms
subject: goal programming
subject: Greece
subject: scale and technical efficiency
subject: stochastic frontier model

description: The present paper examines the importance that efficient resource use may have for cotton growers under the current EU policy regime. To that end, input-oriented technical and scale efficiency score for a sample of 172 cotton-growing farms are empirically quantified. The results suggest that cotton farms in the sample are not efficient mainly due to the nature of the policy regime governing the sector throughout EU. By becoming efficient, the co-responsibility levy will be reduced by 18.3% and farms may increase their profits by 50.1% on the average.
Non-topological spontaneously scalarized neutron stars in tensor-multi-scalar theories of gravity
Creators: name: Doneva, Daniela D.
name: Yazadjiev, Stoytcho S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the present paper, we numerically construct new non-topological, spontaneously scalarized neutron stars in the tensor-multi-scalar theories of gravity whose target space is a three-dimensional maximally symmetric space, namely either $\mathbb{S}^3$, $\mathbb{H}^3$ or $\mathbb{R}^3$, and in the case of a nontrivial map $φ: \text{\it spacetime} \to \text{\it target space}$. The theories of gravity admitting scalarization are characterized by the fact that the field equations always admit the general relativistic solution but for certain ranges of the parameters space it loses stability and nonlinear development of a scalar field is observed. Thus, in order to determine the values of the parameters where such scalarization is possible we studied the stability of the general relativistic solution within the framework of the considered tensor-multi-scalar theories. Based on these results we could obtain a family of scalarized branches characterized by the number of the scalar field nodes. These branches bifurcate from the general relativistic solution at the points where new unstable modes appear and they are energetically more favorable over the pure Einstein solutions. Interestingly, in certain parameter ranges, we could obtain non-uniqueness within a single branch of scalarized solutions.
description: 7 pages, 6 figures
tRNA-isoleucine-tryptophan Composite Gene
Creators: name: Ghosh, Zhumur
name: Chakrabarti, Jayprokas
name: Mallick, Bibekanand
name: Das, Smarajit
name: Sahoo, Satyabrata
name: Sethi, Harmeet Singh
Publisher: name: arXiv
Year: 2005
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Transfer-RNA genes in archaea often have introns intervening between exon sequences. The structural motif at the boundary between exon and intron is the bulge-helix-bulge. Computational investigations of these boundary structures in H. marismortui lead us to propose that tRNA-isoleucine and tRNA-tryptophan genes are co-located. Precise insilico identification of the splice-sites on the bulges at the exon-intron boundaries conduce us to infer that a single intron-containing composite tRNA-gene can give rise to more than one gene produc.
description: 15 pages, 3 figures
Blaesoxipha rossica Villeneuve 1912
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sarcophagidae
Blaesoxipha
Blaesoxipha rossica

description: Blaesoxipha rossica VILLENEUVE, 1912
Bgld, St. Georgen, Hetscherlberg, 22.5.17.
Neu für Burgenland. Keine Fundangaben in FRANZ (1989), aber nach Fauna Europaea auch in Ö präsent.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 792, DOI: 10.5281/zenodo.4004374
Ultrarelativistic boost of the black ring
Creators: name: Ortaggio, Marcello
name: Krtous, Pavel
name: Podolsky, Jiri
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the ultrarelativistic boost of the five-dimensional Emparan-Reall non-rotating black ring. Following the classical method of Aichelburg and Sexl, we determine the gravitational field generated by a black ring moving ``with the speed of light'' in an arbitrary direction. In particular, we study in detail two different boosts along axes orthogonal and parallel to the plane of the ring circle, respectively. In both cases, after the limit one obtains a five-dimensional impulsive pp-wave propagating in Minkowski spacetime. The curvature singularity of the original static spacetime becomes a singular source within the wave front, in the shape of a ring or a rod according to the direction of the boost. In the case of an orthogonal boost, the wave front contains also a remnant of the original disk-shaped membrane as a component of the Ricci tensor (which is everywhere else vanishing). We also analyze the asymptotic properties of the boosted black ring at large spatial distances from the singularity, and its behaviour near the sources. In the limit when the singularity shrinks to a point, one recovers the well known five-dimensional analogue of the Aichelburg-Sexl ``monopole'' solution.
description: 10 pages, 2 figures, REVTeX 4. v2: added boost in an arbitrary direction, one new figure, one new reference. To appear in Phys. Rev. D
Firm-Level Competition in Price and Variety
Creators: name: Richards, Timothy J.
name: Patterson, Paul M.
name: Richards, Timothy J.
name: Patterson, Paul M.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Demand and Price Analysis
subject: cereal
subject: differentiated products
subject: dynamics
subject: oligopoly
subject: product line rivalry
subject: strategic interaction

description: Consumer product manufacturers often compete in dynamic, multi-firm oligopolies using multiple strategic tools. While existing empirical models of strategic interaction typically consider only parts of the more general problem, this paper presents a more comprehensive alternative. Marketing decision are dynamically optimal, consistent with optimal consumer choice, and responsive to rival decisions. Using a single-market case study that consists of five years of four-weekly data on ready-to-eat cereal sales, prices, and new brand introductions, we test several hypotheses regarding the nature of strategic interaction among several rival manufacturers. We find that cereal manufacturers price and introduce new brands cooperatively in the same period, but behave more competitively when dynamic reactions are included.
title: Mystères de Lisbonne : folies littéraire et filmique de Raoul Ruiz
Creators: name: Jel, Pierre-Éric
Publisher: name: Savoirs en prisme
Year: 2012

description: « Il y a dans la vie des événements et des coïncidences si extravagantes qu’aucun romancier n’oserait les inventer. » Cette phrase peut résumer le sujet qui nous occupe, et l’on pourrait même ajouter « qu’aucun cinéaste n’oserait filmer ». Les Mystères de Lisbonne est un film réalisé par le cinéaste franco-lusitano-chilien Raoul Ruiz, adapté du roman éponyme de Camilo Castelo Branco. Lors de sa sortie en salles en octobre 2010, ce long-métrage attise la curiosité par sa durée : près de 4h20, scindées en deux parties, l’une d’1h50 et l’autre de 2h30. Ne serait-ce qu’à partir de cela, il peut déjà être placé dans la catégorie des OFNI, des « Objets Filmiques Non Identifiés », des gageures cinématographiques. Nous tâcherons ici de présenter cette œuvre fascinante qui vient capturer le spectateur dans son dédale de ruelles, pourrions-nous dire, puisqu’il s’agit de Lisbonne.
description: Savoirs en prisme, No. 01 (2012): Images et insularité
Fast, Optimal, and Targeted Predictions using Parametrized Decision Analysis
Creators: name: Kowal, Daniel R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Prediction is critical for decision-making under uncertainty and lends validity to statistical inference. With targeted prediction, the goal is to optimize predictions for specific decision tasks of interest, which we represent via functionals. Although classical decision analysis extracts predictions from a Bayesian model, these predictions are often difficult to interpret and slow to compute. Instead, we design a class of parametrized actions for Bayesian decision analysis that produce optimal, scalable, and simple targeted predictions. For a wide variety of action parametrizations and loss functions--including linear actions with sparsity constraints for targeted variable selection--we derive a convenient representation of the optimal targeted prediction that yields efficient and interpretable solutions. Customized out-of-sample predictive metrics are developed to evaluate and compare among targeted predictors. Through careful use of the posterior predictive distribution, we introduce a procedure that identifies a set of near-optimal, or acceptable targeted predictors, which provide unique insights into the features and level of complexity needed for accurate targeted prediction. Simulations demonstrate excellent prediction, estimation, and variable selection capabilities. Targeted predictions are constructed for physical activity data from the National Health and Nutrition Examination Survey (NHANES) to better predict and understand the characteristics of intraday physical activity.
Super-Cerenkov Radiation: A new phenomenon useful for RICH Detectors
Creators: name: Ion, D. B.
name: Ion, M. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this contribution the Super-Cerenkov radiation (SCR) as a new phenomenon which includes in a more general and exact form the usual Cerenkov effect is presented. The Super-Cerenkov effect at Cerenkov threshold in the radiators of RICH detectors is investigated. The results on the experimental test of the super- Cerenkov coherence conditions are presented. The SCR-predictions are verified experimentally with high accuracy chi/n_{dof}=1.47 by the data on the Cerenkov ring radii of electron, muon, pion and kaon, all measured with RICH detector. Moreover, it is shown that the Super-Cerenkov phenomenon can explain not only subthreshold CR but also the observed secondary rings (or anomalous Cerenkov radiation) observed at CERN SPS accelerator. The influence of medium on the particle propagation properties is also estimated and the refractive properties of electrons, muons, pions, in the radiator C4F10Ar are obtained. So, we proved that the refractive indices of the charged elementary particles in medium are also very important for the RICH detectors, especially at low and intermediate energies.
description: 9 pages, 7 figures
UCN anomalous losses and the UCN capture cross-section on material defects
Creators: name: Serebrov, A.
name: Romanenko, N.
name: Zherebtsov, O.
name: Lasakov, M.
name: Vasiliev, A.
name: Fomin, A.
name: Krasnoshekova, I.
name: Kharitonov, A.
name: Varlamov, V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Experimental data shows anomalously large Ultra Cold Neutrons (UCN) reflection losses and that the process of UCN reflection is not completely coherent. UCN anomalous losses under reflection cannot be explained in the context of neutron optics calculations. UCN losses by means of incoherent scattering on material defects are considered and cross-section values calculated. The UCN capture cross-section on material defects is enhanced by a factor of 10^4 due to localization of UCN around defects. This phenomenon can explain anomalous losses of UCN.
description: 13 pages, 4 figures
Continuum polarization reverberation mapping of AGNs
Creators: name: Lobos, P. A. Rojas
name: Goosmann, R. W.
name: Hameury, J. M.
name: Marin, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The determination of the size and geometry of the broad line region (BLR) in active galactic nuclei is one of the major ingredients for determining the mass of the accreting black hole. This can be done by determining the delay between the optical continuum and the flux reprocessed by the BLR, in particular via the emission lines. We propose here that the delay between polarized and unpolarized light can also be used in much the same way to constrain the size of the BLR; we check that meaningful results can be expected from observations using this technique. We use our code STOKES for performing polarized radiative transfer simulations. We determine the response of the central source environment (broad line region, dust torus, polar wind) to fluctuations of the central source that are randomly generated; we then calculate the cross correlation between the simulated polarized flux and the total flux to estimate the time delay that would be provided by observations using the same method. We find that the broad line region is the main contributor to the delay between the polarized flux and the total flux; this delay is independent on the observation wavelength. This validates the use of polarized radiation in the optical/UV band to estimate the geometrical properties of the broad line region in type I AGNs, in which the viewing angle is close to pole-on and the BLR is not obscured by the dust torus.
description: Accepted for publication in A&A
The Ridge Integration Method and its Application to Molecular Sieving, Demonstrated for Gas Purification via Graphdiyne Membranes
Creators: name: Binder, Christian W.
name: Krondorfer, Johannes K.
name: Hauser, Andreas W.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Eyring theory provides a convenient approximation to the rate of a chemical reaction, as it uses only local information evaluated near extremal points of a given potential energy surface. However, in cases of pronounced anharmonicity and particularly low-lying vibrational frequencies, deviations from the correct reaction rate can become substantial. Molecular Dynamics simulations, on the other hand, are very costly at higher levels of theory, and of limited use since molecular reactions are `rare' events and hence statistically less accessible. In this article, we present an alternative description for problems of gas separation and storage via two-dimensional materials such as porous graphene or flat metal-organic frameworks. Taking geometric advantage of the typical problem setting, our method is based on a statistical analysis of molecular trajectories near the so-called `ridge', a hypersurface which divides the reaction volume into a reactant and a product side. It allows for more realistic predictions of permeabilities and selectivities, e.g. derived from density functional theory, but without the considerable costs of a full molecular dynamics simulation on the corresponding Born-Oppenheimer potential energy surface. We test our method on the example of methane separation from nitrogen and carbon dioxide via a graphdiyne membrane.
description: This is the pre-accepted version of the article published in Molecular Systems Design & Engineering. The final version is available at DOI: 10.1039/D2ME00120A. (c) 2022 The Royal Society of Chemistry. / Supplementary Information (ESI) available: [preliminary python code for ridge integration]. See the following GitHub repository: https://github.com/hauser-group/ridge_integrator
Simultaneous Adoption of Herbicide-Resistance and Conservation-Tillage Cotton Technologies
Creators: name: Roberts, Roland K.
name: English, Burton C.
name: Gao, Qi
name: Larson, James A.
name: Roberts, Roland K.
name: English, Burton C.
name: Gao, Qi
name: Larson, James A.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Farm Management
subject: Bayes' theorem
subject: conservation tillage
subject: cotton
subject: genetically modified crops
subject: herbicide-resistant crops
subject: simultaneous logit model
subject: technology adoption

description: If adoption of herbicide-resistant seed and adoption of conservation-tillage practices are determined simultaneously, adoption of herbicide-resistance seed could indirectly reduce soil erosion and adoption of conservation-tillage practices could indirectly reduce residual herbicide use and increase farm profits. Our objective was to evaluate the relationship between these two technologies for Tennessee cotton production. Evidence from Bayes' theorem and a two-equation logit model suggested a simultaneous relationship. Mean elasticities for acres in herbicide-resistance seed with respect to the probability of adopting conservation-tillage practices and acres in conservation-tillage practices with respect to the probability of adopting herbicide-resistance seed were 1.74 and 0.24, respectively.
Table S3. from Higher temperatures lower rates of physiological and niche evolution
Creators: name: Yanfu Qu
name: Wiens, John J.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology

description: Summary of physiological and climatic niche data for each group.
Ultra High Energy Cosmic Rays
Creators: name: Stanev, Todor
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss theoretical issues and experimental data that brought the ultra high energy cosmic rays in the list of Nature's greatest puzzles. After many years of research we still do not know how astrophysical acceleration processes can reach energies exceeding 10$^{11}$ GeV. The main alternative {\em top-down} mechanism postulates the existence of super massive $X$-particles that create a particle spectrum extending down to the observed energy through their decay channels. The propagation of nuclei and photons from their sources to us adds to the puzzle as all particles of these energies interact with the ambient photons, mostly of the microwave background. We also describe briefly the main observational results and give some information on the new experiments that are being built and designed now.
description: 20 pages, 14 postscript figures, write-up of a lecture at the 2004 SLAC Summer Institute
Neuro-Adaptive Formation Control and Target Tracking for Nonlinear Multi-Agent Systems with Time-Delay
Creators: name: Aryankia, Kiarash
name: Selmic, Rastko R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper proposes an adaptive neural network-based backstepping controller that uses rigid graph theory to address the distance-based formation control problem and target tracking for nonlinear multi-agent systems with bounded time-delay and disturbance. The radial basis function neural network (RBFNN) is used to overcome and compensate for the unknown nonlinearity and disturbance in the system dynamics. The effect of the state time-delay of the agents is alleviated by using an appropriate control signal that is designed based on specific Lyapunov function and Young's inequality. The adaptive neural network (NN) weights tuning law is derived using this Lyapunov function. An upper bound for the singular value of the normalized rigidity matrix is introduced, and uniform ultimate boundedness (UUB) of the formation distance error is rigorously proven based on the Lyapunov stability theory. Finally, the performance and effectiveness of the proposed method are validated through the simulation results on nonlinear multi-agent systems. Comparisons between the proposed distance-based method and an existing, displacement-based method are provided to evaluate the performance of the suggested method.
description: Published in: IEEE Control Systems Letters ( Volume: 5 , Issue: 3 , July 2021 ) Page(s): 791 - 796 Date of Publication: 01 July 2020 Electronic ISSN: 2475-1456 INSPEC Accession Number: 19785039 DOI: 10.1109/LCSYS.2020.3006187 Publisher: IEEE