cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contingent Valuation Elicitation Effects: Revisiting the Payment Card
Creators: name: Kerr, Geoffrey N.
name: Kerr, Geoffrey N.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Consumer/Household Economics
subject: Contingent valuation
subject: payment cards
subject: efficiency

description: Payment cards, which identify upper and lower bounds on individual willingness to pay, are one approach to improve efficiency over the popular dichotomous choice approach to contingent valuation. This paper reports a split sample test of the impacts on benefit estimates and efficiency arising from differences in the numbers of divisions on payment cards. Prior expectations were for increased cell numbers to improve efficiency, but that efficiency gains would eventually be offset because of increased response variance as cell numbers increased. Contrary to prior expectations, parameter estimates, standard errors and benefit measures were invariant to cell numbers.
Geometric classification of non-Hermitian topological systems through the singularity ring
Creators: name: Li, Linhu
name: Lee, Ching Hua
name: Gong, Jiangbin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This work unveils how geometric features of two-band non-Hermitian Hamiltonians can completely classify the topology of their eigenstates and energy manifolds. Our approach generalizes the Bloch sphere visualization of Hermitian systems to a ``Bloch torus'' picture for non-Hermitian systems, where a singularity ring (SR) captures the degeneracy structure of generic exceptional points. The SR picture affords convenient visualization of various symmetry constraints and reduces their topological characterization to the classification of simple intersection or winding behavior, as detailed by our explicit study of chiral, sublattice, particle-hole and conjugated particle-hole symmetries. In 1D, the winding number about the SR corresponds to the band vorticity measurable through the Berry phase. In 2D, more complicated winding behavior leads to a variety of phases that illustrate the richness of the interplay between SR topology and geometry beyond mere Chern number classification. Through a normalization procedure that puts generic 2-band non-Hermitian Hamiltonians on equal footing, our SR approach also allows for vivid visualization of the non-Hermitian skin effect.
description: 17 pages, 15 figures, Comments are welcome
[En fin – Lo mismo de siempre – los mismos métodos de silencio]
Creators: name: Isel, Rivero
name: Rivero, Isel
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Amitié
Vie personnelle
Politique

description: Destinataire : Tejera, Nivaria
description: L’autrice lui demande ce qu’elle pense de Vargas Llosa comme président du Pérou et de Vaclav Havel comme président de la Tchécoslovaquie. Elle évoque les changements en Roumanie et en Allemagne de l’est.
description: La autora le pregunta qué piensa de Vargas Llosa como presidente del Perú y Vaclav Havel como presidente de Checoslovaquia. Se refiere a los cambios en Rumania y Alemania del Este.
description: Source: NT-AB-0000-016
description: Source: Localisation du document : Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.
description: created: inconnue
Higher dimensional inhomogeneous dust collapse and cosmic censorship
Creators: name: Ghosh, S G
name: Beesham, A
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by higher dimensional Tolman-Bondi space-times. The naked singularities are found to be gravitationally strong in the sense of Tipler. Higher dimensions seem to favour black holes rather than naked singularities.
description: 15 pages, LaTeX, 1 figure, 2 tables
[Chère Nivaria, Merci pour tes dessins et pour ta lettre]
Creators: name: François, Dominique
name: Dominique, François
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Poésie
Édition

description: Destinataire : Tejera, Nivaria
description: L’auteur la remercie pour l’envoi de dessins et d’une lettre. Il aimerait faire un choix dans un recueil traduit qu’elle lui a envoyé et ajouter des poèmes plus récents pour une publication. Il lui propose une rencontre à Dijon et de lui envoyer une note sur elle et son travail.
description: El autor le agradece el envío de dibujos y una carta. Le gustaría hacer una selección en un poemario traducido que ella le envió y añadir poemas más recientes para una publicación. Le propone una reunión en Dijon, y que le envía una nota sobre ella y su trabajo.
description: Source: NT-AB-1990-06-03
description: Source: Localisation du document : Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.
Non-marketed Impacts of Ground Water Extraction
Creators: name: Kerr, Geoffrey N.
name: Sharp, Basil M.H.
name: White, Paul
name: Kerr, Geoffrey N.
name: Sharp, Basil M.H.
name: White, Paul
Publisher: name: Unknown
Year: 2001
Subjects: subject: Resource /Energy Economics and Policy
subject: Contingent valuation
subject: water management

description: Competition for the ground water resource is often intense, but little attention is sometimes paid to the values derived from extra-market uses of the resource. This paper presents the results of two valuation studies undertaken in New Zealand. One study assesses the values obtained by the community from management of ground water abstractions to preserve spring, river and wetland flows. The other study measures willingness to pay for domestic water quality. Results show that the community can place high values on these items, which need to be considered in developing water supply and management options.
Night sleep duration trajectories and associated factors among preschool children from the EDEN cohort
Creators: name: Plancoulaine, Sabine
name: Reynaud, Eve
name: Forhan, Anne
name: Lioret, Sandrine
name: Heude, Barbara
name: Charles, Marie-Aline
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applications (stat.AP)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Objective. Sleep duration may vary inter-individually and intra-individually over time. We aimed at both identifying night-sleep duration (NSD) trajectories among preschoolers and studying associated factors. Methods. NSD were collected within the French birth-cohort study EDEN at ages 2, 3 and 5-6 years through parental questionnaires, and were used to model NSD trajectories among 1205 children. Familial socioeconomic factors, maternal sociodemographic, health and lifestyle characteristics as well as child health, lifestyle, and sleep characteristics at birth and/or at age 2 years were investigated in association with NSD using multinomial logistic regressions. Results. Five distinct NSD trajectories were identified: short (SS, <10h, 4.9%), medium-low (MLS, <11h, 47.8%), medium-high (MHS, $\approx$11h30, 37.2%), long (LS, $\ge$11h30, 4.5%) and changing (CS, i.e. $\ge$11h30 then <11h, 5.6%) NSD trajectories. Multivariable analyses showed in particular that, compared to the MHS trajectory, factors associated with increased risk for belonging to SS trajectory were male gender, first child, maternal age and working status, night-waking, parental presence when falling asleep, television-viewing duration and both the `Processed and fast foods' and the `Baby food' dietary patterns at age 2 years. Factors positively associated with the CS trajectory were maternal smoking, bottle-feeding at night and the `Processed and fast foods' dietary pattern at age 2 years whereas child's activity and emotionality scores at age 1 year were negatively associated. Conclusion. We identified distinct NSD trajectories among preschoolers and associated early life factors. Some of them may reflect less healthy lifestyle, providing cues for early multi-behavioral prevention interventions
Stelis ater
Creators: name: Rozen, Jerome G.
name: Hall, H. Glenn
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Stelis
Stelis ater

description: STELIS ATER   EGG/MATURE OOCYTE  Figures 35, 73, 76, 77
 DIAGNOSIS: Eggs/mature oocytes have been described for Stelis elongativentris (Rozen, 1987) and S. (Stelis) murina Pérez (Rozen and Kamel, 2009). Those of S. ater are remarkably similar in color and shape, all characterized by their shortness relative to maximum diameters, rounded front ends, and slightly more narrowly rounded posterior ends. Of the three species, those of S. ater are the longest.
 Eggs of Stelis ater can be immediately distinguished from those of the host by shape and size. Those of Osmia chalybea are substantially longer, and their maximum diameter is posterior to midbody as seen in lateral view (figs. 70, 71) rather than at the midbody as in S. ater (fig. 72).
DESCRIPTION: Length 2.2–2.4 mm; maximum width 0.88–0.98 mm (N = 5) at approximate midbody. Shape slightly curved with ventral surface flat to slightly concave in lateral view; anterior end broadly rounded in lateral view; maximum breadth at midbody with posterior half tapering to slightly more narrowly round posterior end in lateral view (fig. 72); micropyle a disc (fig. 77) surrounded by converging ridges on normally curved surface of front of egg at anterior pole (fig. 76) not visible under stereomicroscope; apparent absence of pores not understood. Egg color translucent whitish; chorion under stereoscope clear, shiny, glassy. Under SEM examination chorion featureless except for micropylar area.
description: Published as part of Rozen, Jerome G. & Hall, H. Glenn, 2011, Nesting and Developmental Biology of the Cleptoparasitic Bee Stelis ater (Anthidiini) and Its Host, Osmia chalybea (Osmiini) (Hymenoptera: Megachilidae), pp. 1-40 in American Museum Novitates 2011 (3707) on page 30, DOI: 10.1206/3707.2, http://zenodo.org/record/5359259
Evaluating the economic benefits of salinity management in irrigated agriculture
Creators: name: Kularatne, Dailin
name: Kularatne, Dailin
Publisher: name: Unknown
Year: 2001
Subjects: subject: Farm Management
subject: Benefit –cost analysis
subject: Salinity management
subject: GIS

description: Salinity management in irrigated regions is a significant challenge for rural communities, agricultural industries and the governments and there is considerable policy and community interest in evaluating the benefits and costs of salinity management programs. This paper discusses methods currently being used to evaluate irrigation salinity management plans in Victoria. Economic evaluation supported by spatial analysis allows us to see how and where profitable achievements are being made and also where further work is required for more beneficial results. The paper presents several different analytical procedures adopted to evaluate the achievements of Salinity Management Plans in irrigated regions in Victoria, incorporating Benefit-Cost analysis (BCA), Geographic Information Systems (GIS) and Gross Margin analysis.
Design of a separation system for the closed-loop superheated steam drying process in the paper industry
Creators: name: de Oliveira, Felipe
name: Meinders, Marcel
name: Zondervan, Edwin
Publisher: name: Zenodo
Year: 2024
Subjects: superheated steam drying
paper industry
drying process

description: Poster presented at the 19th Netherlands Process technology Symposium. 8-9 October 2024, Groningen, the Netherlands.
An integrated model for water allocation in the Namoi River: economic module
Creators: name: Letcher, Rebecca A.
name: Watson, W.D.
name: Hall, Nigel H.
name: Letcher, Rebecca A.
name: Watson, W.D.
name: Hall, Nigel H.
Publisher: name: Unknown
Year: 2001
Subjects: Resource /Energy Economics and Policy

description: Increasing pressures on water resources and associated cuts in allocation currently threaten many irrigators in the Namoi River catchment. In particular, cuts to groundwater allocation in many zones are expected to have significant negative social and economic impacts. Changed access to off-allocation water has been seen by many in the catchment as one possibility for mediating the impacts of these cuts. This paper discusses water allocation problems in the Namoi River catchment and the way in which off-allocation water may be utilised under various management strategies. A conceptual framework for an integrated economic and hydrological model for considering these options is developed, and details of the economic module are presented.
Association of night-waking and inattention/hyperactivity symptoms trajectories in preschool-aged children
Creators: name: Reynaud, Eve
name: Forhan, Anne
name: Heude, Barbara
name: Charles, Marie-Aline
name: Plancoulaine, Sabine
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applications (stat.AP)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Objective: To study the longitudinal associations between inattention/hyperactivity symptoms and night-waking in preschool-years, in light of their joint evolution.Study design: Within the French birth-cohort study EDEN, repeated measures of 1342 children's night-waking and inattention/hyperactivity symptoms were collected at age 2, 3 and 5-6 through questionnaires. Trajectories were computed using group-based modeling. Logistic regressions, adjusted for confounding factors, were used to measure the association between trajectories and to determine risk factors for belonging to the identified joint trajectories.Results: Two night-waking trajectories were observed, 20% of the children had a trajectory of `common night-waking', and 80% a trajectory of `rare night-waking'. The children were distributed in three inattention/hyperactivity trajectories, a low (47%), medium (40%) and high one (13%). Both night-waking and inattention/hyperactivity trajectories showed persistence of difficulties in preschool years. The risk of presenting a high inattention/hyperactivity trajectory compared to a low one was of 4.19[2.68-6.53] for common night-wakers, compared to rare night-wakers. Factors associated with joint trajectories were parent's education level and history of childhood behavioral problems, and the child's gender, night-sleep duration and collective care at 2 years of age.Conclusion: Results suggest that children presenting behavioral difficulties would benefit from a systematic investigation of their sleep quality and conversely.
Perfect control of photoelectron anisotropy for randomly oriented ensembles of molecules by XUV REMPI and polarization shaping
Creators: name: Goetz, R. Esteban
name: Koch, Christiane P.
name: Greenman, Loren
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report two schemes to generate perfect anisotropy in the photoelectron angular distribution of a randomly oriented ensemble of polyatomic molecules. In order to exert full control over the anisotropy of photoelectron emission, we exploit interferences between single-photon pathways and a manifold of resonantly-enhanced two-photon pathways. These are shown to outperform non-sequential $(ω,2ω)$ bichromatic phase control for the example of CHFClBr molecules. We are able to optimize pulses that yield anisotropic photoelectron emission thanks to a very efficient calculation of photoelectron momentum distributions. This is accomplished by combining elements of quantum chemistry, variational scattering theory, and time-dependent perturbation theory.
First report of antioxidant 1H-benzochromenone from muricid gastropod Chicoreus ramosus as dual inhibitors of pro-inflammatory 5-lipoxygenase and carbolytic enzymes
Creators: name: Chakraborty, Kajal
name: Soumya Salas
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Chromene derivatives with manifold structural framework and pharmacological properties were ubiquitous in the mollusks of marine origin. A previously undescribed 1H-benzochromenone was isolated through bioassay-guided chromatographic purification of the organic extract of the marine gastropod mollusk Chicoreus ramosus. The compound was characterised as 6-(2′,2′-dimethyl)-3′-en-1′-yl-1′-oxy)-3-hydroxy-1H-benzo[c]chromene-2(10aH)-one based on integrated spectroscopic analysis. The antioxidant studies by employing the stable free radicals reported that the antioxidant activity (IC50 1.4–1.6 mM) was comparable to α-tocopherol (IC50 1.4–1.7 mM). The attenuating potential of the studied compound against pro-inflammatory 5-lipoxygenase (IC50 2.12 mM) was significantly greater than that exhibited by anti-inflammatory drug ibuprofen (IC50 4.4 mM), whereas its inhibitory properties against carbolytic α-amylase (IC50 ∼0.72 mM) was comparable with that displayed by acarbose (IC50 0.43 mM). The present study recognised the potential of 1H-benzochromenone derivative isolated from C. ramosus as important pharmaceutical lead with anti-diabetic and anti-inflammatory potentials to reduce the risk of hyperglycaemia and inflammatory pathologies.
[Mi muy querida Nivaria: Antes que nada, un gran abrazo de Año Nuevo]
Creators: name: Aurelio de la, Vega
name: Vega, Aurelio De La
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Commémoration du Centenaire de la République de Cuba

description: Destinataire : Tejera, Nivaria
description: L’auteur joint le programme d’une table ronde sur le thème ‘’Cuba: La República y la diáspora’’ dans le cadre de la Commémoration du Centenaire de la République de Cuba qui aura lieu le 19 janvier au La Cañada Country Club (La Cañada Flintridge, Californie). Interviendront : Carlos Alberto Montaner, Rafael Rojas, Enrico Mario Santí et Aurelio de la Vega (modérateur).
description: El autor adjunta el programa de una mesa redonda sobre el tema ''Cuba: La República y la diáspora'' en el marco de la Conmemoración del Centenario de la República de Cuba que tendrá lugar el 19 de enero en el La Cañada Country Club (La Cañada Flintridge, California). Intervendrán: Carlos Alberto Montaner, Rafael Rojas, Enrico Mario Santí y Aurelio de la Vega (moderador).
description: Note : Le Post-it © comportant le texte d’Aurelio de la Vega collé sur le feuillet imprimé du programme de la table ronde.
description: Source: NT-AB-2002-01-00
description: Source: Localisation du document : Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.
Constraining the Littlest Higgs
Creators: name: Hewett, J. L.
name: Petriello, F. J.
name: Rizzo, T. G.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Little Higgs models offer a new way to address the hierarchy problem, and give rise to a weakly-coupled Higgs sector. These theories predict the existence of new states which are necessary to cancel the quadratic divergences of the Standard Model. The simplest version of these models, the Littlest Higgs, is based on an $SU(5)/SO(5)$ non-linear sigma model and predicts that four new gauge bosons, a weak isosinglet quark, $t'$, with $Q=2/3$, as well as an isotriplet scalar field exist at the TeV scale. We consider the contributions of these new states to precision electroweak observables, and examine their production at the Tevatron. We thoroughly explore the parameter space of this model and find that small regions are allowed by the precision data where the model parameters take on their natural values. These regions are, however, excluded by the Tevatron data. Combined, the direct and indirect effects of these new states constrain the `decay constant' $f\gsim 3.5$ TeV and $m_{t'}\gsim 7 $ TeV. These bounds imply that significant fine-tuning be present in order for this model to resolve the hierarchy problem.
description: 31 pgs, 26 figures; bound on t' mass fixed to mt'>2f, conclusions unchanged
Role of Landau-Rabi quantization of electron motion on the crust of magnetars within the nuclear energy density functional theory
Creators: name: Mutafchieva, Y. D.
name: Chamel, N.
name: Stoyanov, Zh. K.
name: Pearson, J. M.
name: Mihailov, L. M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Magnetic fields of order $10^{15}$ G have been measured at the surface of some neutron stars, and much stronger magnetic fields are expected to be present in the solid region beneath the surface. The effects of the magnetic field on the equation of state and on the composition of the crust due to Landau-Rabi quantization of electron motion are studied. Both the outer and inner crustal regions are described in a unified and consistent way within the nuclear-energy density functional theory.
description: 23 pages, 11 figures
Highlights of human ectopic fascioliasis: a systematic review
Creators: name: Taghipour, Ali
name: Zaki, Leila
name: Rostami, Ali
name: Foroutan, Masoud
name: Ghaffarifar, Fatemeh
name: Atefeh Fathi
name: Abdoli, Amir
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Fascioliasis is a tropical zoonotic disease caused by the Fasciola parasite. The adult parasite usually resides in the liver and biliary ducts; however, several cases of ectopic fascioliasis (EF) have been reported. This study is a highlight on EF according to the confirmed case reports. In a setting of systematic review, we found 25 eligible articles containing 26 confirmed cases of EF (any date until 30 November 2018), including abdominal and intestinal EF in six cases, skin and subcutaneous tissues in five cases, eye in four cases, brain and pancreas in three cases, neck and lymph node in two cases, and lung, dorsal spine, and peritoneal cavity in one case, respectively. The result indicates that fascioliasis can have diverse ectopic forms and should be more attended in the endemic regions of fascioliasis in order to distinguish from other endemic diseases.
Agricultural Price Distortions: Trends and Volatility, Past and Prospective
Creators: name: Anderson, Kym
name: Anderson, Kym
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agricultural and Food Policy
subject: Long-term trade policy trends
subject: policy responses to price volatility
subject: relative rates of assistance

description: For decades, earnings from farming in many developing countries have been depressed by a pro-urban bias in own-country policies, as well as by governments of richer countries favouring their farmers with import barriers and subsidies. Both sets of policies reduced global economic welfare and agricultural trade, and almost certainly added to global inequality and poverty. Progress has been made over the past three decades in reducing agricultural protection in high-income countries and agricultural disincentives in developing countries, but the propensity of governments to insulate their domestic food market from fluctuations in international prices has not waned. Both food-importing and food-exporting countries engage in insulating behaviour, which contributes to the amplification of international food price fluctuations yet does little to advance their national food security. Thus much scope still remains to improve economic welfare and to reduce poverty by removing remaining trade distortions. This paper summarizes indicators of these trends and fluctuations in farm trade barriers before examining what unilateral or multilateral trade arrangements, together with complementary domestic measures, could help advance global food security.
Focusing Vacuum Fluctuations II
Creators: name: Ford, L. H.
name: Svaiter, N. F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The quantization of the scalar and electromagnetic fields in the presence of a parabolic mirror is further developed in the context of a geometric optics approximation. We extend results in a previous paper to more general geometries, and also correct an error in one section of that paper. We calculate the mean squared scalar and electric fields near the focal line of a parabolic cylindrical mirror. These quantities are found to grow as inverse powers of the distance from the focus. We give a combination of analytic and numerical results for the mean squared fields. In particular, we find that the mean squared electric field can be either negative or positive, depending upon the choice of parameters. The case of a negative mean squared electric field corresponds to a repulsive Van der Waals force on an atom near the focus, and to a region of negative energy density. Similarly, a positive value corresponds to an attractive force and a possibility of atom trapping in the vicinity of the focus.
description: 26 pages, 15 figures; additional discussion added in Sects. IV and IX
Maximal Acceleration Effects in Kerr Space
Creators: name: Bozza, V.
name: Feoli, A.
name: Lambiase, G.
name: Papini, G.
name: Scarpetta, G.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a model in which accelerated particles experience line--elements with maximal acceleration corrections that are introduced by means of successive approximations. It is shown that approximations higher than the first need not be considered. The method is then applied to the Kerr metric. The effective field experienced by accelerated test particles contains corrections that vanish in the limit $\hbar\to 0$, but otherwise affect the behaviour of matter greatly. The corrections generate potential barriers that are external to the horizon and are impervious to classical particles.
description: 16 pages, 10 figures, to appear on Phys. Lett. A
Universal spin-polarization fluctuations in 1D wires with magnetic impurities
Creators: name: Mortensen, N. A.
name: Egues, J. C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study conductance and spin-polarization fluctuations in one-dimensional wires with spin-5/2 magnetic impurities (Mn). Our tight-binding Green function approach goes beyond mean field thus including s-d exchange-induced spin-flip scattering. In a certain parameter range, we find that spin flip suppresses conductance fluctuations while enhancing spin-polarization fluctuations. More importantly, spin-polarization fluctuations attain a universal value 1/3 for large enough spin flip strengths. This intrinsic spin-polarization fluctuation may pose a severe limiting factor to the realization of steady spin-polarized currents in Mn-based 1D wires.
description: 5 pages including 4 figures
Rhadinella Smith 1941
Creators: name: Myers, Charles W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Dipsadidae
Rhadinella

description: Rhadinella Smith, 1941
 TYPE SPECIES: Rhadinella schistosa Smith (1941), by original designation and monotypy.
 DEFINITION AND DIAGNOSIS: See group definition in Myers (1974: 119). Separated from Rhadinaea and most other dipsadines by the straight-line arrangement of several enlarged posterior maxillary teeth (ultimate fang not offset). The maxillary dentition is similar in Trimetopon, a variable genus of diminutive snakes in lower Central America that differs from Rhadinella in lacking a basal nude pocket on the hemipenis (Myers, unpublished).
 CONTENT: Fifteen species: Rhadinella anachoreta (Smith and Campbell), new combination; Rhadinella godmani (Günther), new comb.; Rhadinella hannsteini (Stuart), new comb.; Rhadinella hempsteadae (Stuart and Bailey), new comb.; Rhadinella kanalchutchan (Mendelson III and Kirzirian), new comb.; Rhadinella kinkelini (Boettger), new comb.; 19 Rhadinella lachrymans (Cope), new comb.; Rhadinella montecristi (Mertens), new comb.; Rhadinella pegosalyta (McCranie), new comb.; Rhadinella pilonaorum (Stuart), new comb.; Rhadinella posadasi (Slevin), new comb.; Rhadinella rogerromani (Köhler and McCranie), new comb.; Rhadinella schistosa Smith; Rhadinella serperaster (Cope), new comb.; Rhadinella tolpanorum (Holm and Cruz D.), new comb.
description: Published as part of Myers, Charles W., 2011, A New Genus and New Tribe for Enicognathus melanauchen Jan, 1863, a Neglected South American Snake (Colubridae: Xenodontinae), with Taxonomic Notes on Some Dipsadinae, pp. 1-36 in American Museum Novitates 2011 (3715) on page 28, DOI: 10.1206/3715.2, http://zenodo.org/record/5359400
Vacuum polarization in the spacetime of charged nonlinear black hole
Creators: name: Berej, Waldemar
name: Matyjasek, Jerzy
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Building on general formulas obtained from the approximate renormalized effective action, the approximate stress-energy tensor of the quantized massive scalar field with arbitrary curvature coupling in the spacetime of charged black hole being a solution of coupled equations of nonlinear electrodynamics and general relativity is constructed and analysed. It is shown that in a few limiting cases, the analytical expressions relating obtained tensor to the general renormalized stress-energy tensor evaluated in the geometry of the Reissner-Nordström black hole could be derived. A detailed numerical analysis with special emphasis put on the minimal coupling is presented and the results are compared with those obtained earlier for the conformally coupled field. Some novel features of the renormalized stress-energy tensor are discussed.
Policy Implications and Mitigation Potential in China Agricultural Greenhouse Gas Emission
Creators: name: Huang, Delin
name: Huang, Delin
Publisher: name: Unknown
Year: 2012
Subjects: subject: Environmental Economics and Policy
subject: Chinese Agro-Greenhouse Gas Emissions
subject: Reduction Potential
subject: Control Policy.

description: By establishing the database for and constructing the GTAP-E model of Reduction Potential and Control Policy for Chinese Agricultural Greenhouse Gas Emissions, this paper simulates control policies and the reduction potential of Chinese Agricultural Greenhouse Gas Emissions. The result is that with a 5% reduction China's GDP is reduced by 0.059%, social welfare is increased by 1.16 billion U.S. dollars, there is a 22.08% increase in the price of rice and a 2.9% increase in other crop prices. The price of cattle and sheep increases by 163.43%, the price of pigs and poultry by 0.57%, while other livestock prices fall by 0.98%. With a 5% reduction, the competitiveness of agricultural products in the international market will be reduced, and their export significantly reduced, but increased exports in other sectors result in China's net exports increasing by USD 4.55 billion. Tax levied on agricultural emissions will be USD 22.311 billion.
Novelising Architecture: Gothic Reflections between Literature and Architecture in Eighteenth-Century England
Creators: name: Beckaert, Julien
Publisher: name: figshare
Year: 2019
Subjects: subject: 210305 British History
subject: FOS: History and archaeology

description: This Master's Thesis focuses on the relations — correspondences, analogies, mirror-images — that can be found between ekphrases of Gothic architecture in eighteenth-century Gothic novels (Horace Walpole, Ann Radcliffe and Walter Scott) and the architecture of the Gothic Revival in England.
Probability of radiation of twisted photons in an inhomogeneous isotropic dispersive medium
Creators: name: Bogdanov, O. V.
name: Kazinski, P. O.
name: Lazarenko, G. Yu.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The general formula for probability to record a twisted photon produced by a charged particle moving in an inhomogeneous isotropic dispersive medium is derived. The explicit formulas for probability to record a twisted photon are obtained for the radiation of a charged particle traversing a dielectric plate or an ideally conducting foil. It is shown that, in the case when the charged particle moves along the detector axis, all the radiated twisted photons possess a zero projection of the total angular momentum and the probability of their radiation is independent of the photon helicity. The radiation produced by helically microbunched beams of charged particles is also considered. The fulfillment of the strong addition rule for the projection of the total angular momentum of radiated twisted photons is demonstrated. Thus the helical beams allow one to generate coherent transition and Vavilov-Cherenkov radiations with large projections of the total angular momentum. The radiation produced by charged particles in a helical medium is studied. Typical examples of such a medium are metallic spirals and cholesteric liquid crystals. It is shown that the radiation of a charged particle moving along the helical axis of such a medium is a pure source of twisted photons.
description: 28 pp, 7 figs; some misprints corrected
Additional file 1 of Evaluation of acute myeloid leukemia blast percentage on MethylC-Capture Sequencing results
Creators: name: Yang, Erna
name: Gong, Desheng
name: Guan, Wei
name: Li, Jieying
name: Gao, Xuefeng
name: Li, Yonghui
name: Yu, Li
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Details for bioinformatics analysis.
Higher order QED corrections to deep inelastic scattering
Creators: name: Blümlein, Johannes
name: Kawamura, Hiroyuki
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the leptonic ${\cal O}(α^2 L)$ corrections for unpolarized deeply inelastic ep scattering using mixed variables.
description: 5 pages LaTeX, 1 style file, presented at RADCOR 2002, Kloster Banz, Sept.8-13, 2002
Public Expenditures, Private Incentives, and Farmer Adoption: The Economics of Hybrid Rice in South Asia
Creators: name: Spielman, David J.
name: Kolady, Deepthi
name: Cavalieri, Anthony
name: Spielman, David J.
name: Kolady, Deepthi
name: Cavalieri, Anthony
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agricultural and Food Policy
subject: Hybrid rice
subject: agricultural research and development
subject: technological change
subject: innovation
subject: South Asia

description: The rapid expansion of hybrid rice cultivation in China has contributed significantly to improving food security in the country since the 1980s. However, few other Asian countries have seen similar expansions in hybrid rice cultivation or the associated yield and output gains. This paper examines the technical challenges, market opportunities, and policy constraints related to hybrid rice in Asia, with specific emphasis on India and Bangladesh. The paper sets the discussion within a novel analytical approach to agricultural science, technology, and innovation that focuses on improving the efficiency with which new technologies are transformed into economically relevant products and services.
KAPITAL BOZORINING IQTISODIYOTDAGI O'RNI VA UNING RIVOJLANISHI
Creators: name: Nuriddinov, Ziyovuddin
Publisher: name: Zenodo
Year: 2024

description: Kapital bozori har qanday mamlakat iqtisodiyotining asosiy komponentlaridan biri hisoblanadi. U iqtisodiyotning moliyaviy qismi sifatida korxonalar, davlat va fuqarolar uchun uzoq muddatli moliyaviy resurslarni jalb qilish vositasi bo‘lib xizmat qiladi. Kapital bozorining rivojlanishi korxonalarning investitsion salohiyatini oshirishga, yangi loyihalarni amalga oshirishga va iqtisodiy o‘sishni tezlashtirishga yordam beradi. Shu bois, kapital bozorining samaradorligi va barqarorligi iqtisodiy barqarorlik uchun muhim ahamiyatga ega.
[Chère Nivaria, Je te remercie pour ta lettre noire et argent.]
Creators: name: François, Dominique
name: Dominique, François
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Littérature
‘’Somnambule du soleil’’
Poésie

description: Destinataire : Tejera, Nivaria
description: L’auteur l’informe qu’il a pu parlé à Bernard (Noël?) lors de la Rencontre à Royaumont sur les poètes ‘’objectivistes’’ américains. Celui-ci leur laisse toute liberté pour le choix de ses poèmes à publier chez Ulysse Fin de Siècle. Concernant les traductions, il annonce que son amie Danièle Duby n’as pas le temps, qu’il n’a pas de réponse à sa demande d’aide à Antonio Domínguez-Rey à Madrid, et évoque la nécessité d’un traducteur compétent. Pour terminer, il évoque un colloque sur Louis-René des Forêts à Paris, et espère une prochaine visite de sa part.
description: El autor le informa de que pudo hablar con Bernard (¿Noël?) durante el Encuentro en Royaumont sobre los poetas ''objetivistas'' americanos. Bernard les deja toda libertad para la elección de sus poemas para publicar en Ulysse Fin de Siècle. En cuanto a las traducciones, anuncia que su amiga Danièle Duby no tiene tiempo, que no tiene respuesta a su petición de ayuda a Antonio Domínguez-Rey en Madrid, y menciona la necesidad de un traductor competente. Por último, menciona un coloquio sobre Louis-René des Forêts en París, y espera una próxima visita de su parte.
description: Source: NT-AB-1989-12-05
description: Source: Localisation du document : Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.
Compensation for thermal effects in mirrors of Gravitational Wave Interferometers
Creators: name: Hello, P.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we study several means of compensating for thermal lensing which, otherwise, should be a source of concern for future upgrades of interferometric detectors of gravitational waves. The methods we develop are based on the principle of heating the cold parts of the mirrors. We find that thermal compensation can help a lot but can not do miracles. It seems finally that the best strategy for future upgrades (``advanced configurations'') is maybe to use thermal compensation together with another substrate materials than Silica, for example Sapphire.
description: 20 pages, 12 figures
Self-Reported Food Insecurity in Africa During the Food Price Crisis
Creators: name: Arora, Abhimanyu
name: Swinnen, Johan F.M.
name: Verpoorten, Marijke
name: Arora, Abhimanyu
name: Swinnen, Johan F.M.
name: Verpoorten, Marijke
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: Risk and Uncertainty
subject: Food policy
subject: food insecurity measurement
subject: Sub-Saharan Africa
subject: food crisis

description: This article analyzes data on self-reported food insecurity of more than 50,000 individuals in 18 Sub- Saharan African countries over the period 2005 to 2008, when global food prices increased dramatically. The average level of self-reported food insecurity was high but remarkably stable, at about 54%. However, this average hides large heterogeneity, both within countries and across countries. In eight of the sample countries, self-reported food security improved, while it worsened in the ten other countries. Our results suggest that heterogeneous effects in self-reported food security are consistent with economic predictions, as they are correlated with net food consumption (both at the household and country level) and economic growth. Specifically, self-reported food security improved on average in rural households, while it worsened in urban households. Improvements in food security were positively correlated with net food exports and GDP per capita growth. We estimate that over the period 2005-2008 between 5 and 12 million people in the 18 SSA countries became more food secure. While the self-reported indicator used in this paper requires further study and one should carefully interpret the results, our findings suggest the need for a critical evaluation of the currently used data in the public debate on the food price crisis, which makes mention of hundreds of millions of additional food insecure.
Photoinduced interfacial chiral modes in threefold topological semimetal
Creators: name: Islam, SK Firoz
name: Zyuzin, A. A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the chiral electronic modes at the interface between two regions of a threefold topological semimetal, which is illuminated by left and right handed elliptically polarized waves. The radiation effects on the band structure of semimetal is analyzed by using Floquet theory. Two distinct solutions of the interface modes are found with the chirality depending on the phase of the irradiation. We also consider the anomalous Hall response which is attributed to the transition between dispersionless flat band and conic bands.
description: 5 pages
Do Preferential Trade Agreements Increase Members’ Agri-food Trade?
Creators: name: Haq, Zahoor Ul
name: Meilke, Karl D.
name: Orden, David
name: Haq, Zahoor Ul
name: Meilke, Karl D.
name: Orden, David
Publisher: name: Unknown
Year: 2012
Subjects: subject: Research Methods/ Statistical Methods
subject: Trade Policy
subject: Trade Agreements
subject: Selection Bias

description: This study estimates the effect of a diverse group of 30 PTAs on members’ trade of 26 agri-food products categorized into eight commodity sectors for 1990, 1995, 2000 and 2000 using disaggregated trade data for 40 countries and the Heckman selection model. Results show that whether reported zero trade-flows are considered actual or potential affects the size of the estimated PTA impacts. However, irrespective of the true nature of the zero trade-flows, the effects of PTAs are found positive and statistically significant. OLS estimates fall between the Heckman-model-derived conditional and unconditional effects of PTAs.
Stable singularities of wave-fronts in general relativity
Creators: name: Low, Robert J
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A wave-front in a space-time $\cal M$ is a family of null geodesics orthogonal to a smooth spacelike two-surface in $\cal M$; it is of some interest to know how a wave-front can fail to be a smoothly immersed surface in $\cal M$. In this paper we see that the space of null geodesics $\cal N$ of $\cal M$, considered as a contact manifold, provides a natural setting for an efficient study of the stable singularities arising in the time evolution of wave-fronts.
description: 5 pages
Which would work better for improved soil fertility management in sub-Saharan Africa: Fertilizer Subsidies or Carbon Credits?
Creators: name: Marenya, Paswel Phiri
name: Nkonya, Ephraim M.
name: Xiong, Wei
name: Rossel, Jose Deustua
name: Edward, Kato
name: Marenya, Paswel Phiri
name: Nkonya, Ephraim M.
name: Xiong, Wei
name: Rossel, Jose Deustua
name: Edward, Kato
Publisher: name: Unknown
Year: 2012
Subjects: subject: Farm Management
subject: International Development
subject: Land Economics/Use
subject: Research and Development/Tech Change/Emerging Technologies
subject: fertilizer subsidy
subject: carbon payments
subject: sub-Saharan Africa

description: Why do many smallholder farmers fail to adopt improved land-use practices which can improve yields and incomes? The reason is not always because these practices are uneconomical but sometimes it is because resource poverty prevents farmers from taking advantage of yield and income enhancing agricultural practices. In this study we examine the relative merits of using a carbon payment scheme compared to a subsidy policy to help reduce the cost of specific best management practices (BMPs) with productivity and ecosystem benefits. Using a 30-year crop simulation model, we examine the impacts of different soil fertility management treatments (SFTs) on yields and soil carbon and proceed to compute discounted incremental revenue streams over the same period. We find that the SFTs simulated are on average profitable given the conditions assumed in the DSSAT simulations and subsequent net present value analysis and revenue-cost comparisons. When carbon was priced at $8 or $12/t, the increase in incremental incomes generated from a carbon payment were higher than those imputed from a 50% fertilizer subsidy. When carbon was priced at $4/t, the increase was almost always equal and sometimes higher than that from the imputed income transfer from a 50% subsidy. If these indications hold in further research, it could imply that using fertilizer subsidies as the sole mechanism for stimulating adoption of improved soil fertility management practices may unnecessarily forgo other complementary and possibly superior alternatives. Given the fiscal burden on public finances and unavoidable opportunity costs of any substantial subsidy program, it is possible that a carbon payment system is a reasonable alternative even at low carbon prices especially if accompanied by measures to ameliorate the costs of fertilizer to farmers.