169,716 research outputs found
Nonradial oscillations in classical Cepheids: the problem revisited
No full textContext.We analyse the presence of nonradial oscillations in Cepheids, a problem that has not been theoretically revised since the work of Dziembowski (1977, Acta Astron., 27, 95) and Osaki (1977, PASJ, 29, 235). Our analysis is motivated by a work of Moskalik et al. (2004, ASPC, 310, 498), which reports the detection of low-amplitude periodicities in
a few Cepheids of the large Magellanic cloud. These newly discovered periodicities
were interpreted as nonradial modes.
Aims.Based on linear nonadiabatic stability analysis, our goal is to reanalyse the presence and stability of nonradial modes, taking into account improvement in the main input physics required for the modelling of Cepheids.
Methods.We compare the results obtained from two different numerical methods used to solve
the set of differential equations: a matrix method and the Ricatti method.
Results.We show the limitation of the matrix method for finding low-order p-modes (), because of their dual character in evolved stars such as Cepheids. For higher order
p-modes, we find excellent agreement between the two methods.
Conclusions.No nonradial instability is found below , whereas many unstable nonradial modes
exist for higher orders. We also find that nonradial modes remain unstable,
even at hotter effective temperatures than the blue edge of the Cepheid
instability strip, where no radial pulsations are expected
Importation de déchets ménagers allemands. Convention de Bâle du 22 mars 1989. Application (non). Absence de ratification par l'Allemagne. Mouvements de déchets transfrontaliers. Élimination coordonnée dans les zones frontalières. Conditions nécessaires pour autoriser l'importation. Obligation de l'autorité administrative d'opposer un refus si l'élimination est susceptible de présenter un danger pour la santé humaine et l'environnement notamment en étant réalisée dans une installation classée ne fonctionnant pas régulièrement Tribunal administratif de Strasbourg, 19 mai 1993 A.F.R.P.N. Alsace-Nature c/ Préfet du Bas-Rhin et autres. Avec note.
No full textWinisdoerffer Yves. Importation de déchets ménagers allemands. Convention de Bâle du 22 mars 1989. Application (non). Absence de ratification par l'Allemagne. Mouvements de déchets transfrontaliers. Élimination coordonnée dans les zones frontalières. Conditions nécessaires pour autoriser l'importation. Obligation de l'autorité administrative d'opposer un refus si l'élimination est susceptible de présenter un danger pour la santé humaine et l'environnement notamment en étant réalisée dans une installation classée ne fonctionnant pas régulièrement Tribunal administratif de Strasbourg, 19 mai 1993 A.F.R.P.N. Alsace-Nature c/ Préfet du Bas-Rhin et autres. Avec note.. In: Revue Juridique de l'Environnement, n°4, 1994. pp. 429-443
Marais côtier d'intérêt écologique. / Ouverture à l'urbanisation par le préfet de l'île de Tinos en Grèce ayant entraîné sa destruction et l'implantation de constructions sources de nuisances pour le voisinage. / Non-violation de l'article 8 de la CEDH : dégradation du milieu naturel environnant et pollutions sonores et lumineuses engendrées par les activités touristiques (oui) / Détérioration substantielle du cadre de vie des individus (non). Cour européenne des droits de l'homme, 22 mai 2003, affaire Kyrtatos c/ Grèce. Avec opinion en partie dissidente et note
No full textZagrebelsky , Winisdoerffer Yves. Marais côtier d'intérêt écologique. / Ouverture à l'urbanisation par le préfet de l'île de Tinos en Grèce ayant entraîné sa destruction et l'implantation de constructions sources de nuisances pour le voisinage. / Non-violation de l'article 8 de la CEDH : dégradation du milieu naturel environnant et pollutions sonores et lumineuses engendrées par les activités touristiques (oui) / Détérioration substantielle du cadre de vie des individus (non). Cour européenne des droits de l'homme, 22 mai 2003, affaire Kyrtatos c/ Grèce. Avec opinion en partie dissidente et note. In: Revue Juridique de l'Environnement, n°2, 2004. pp. 171-179
Loi Verdeille du 10 juillet 1964. Apport forcé des droits de chasse sur les terrains à une ACCA. Propriétaires opposés à la pratique de la chasse. Limitations à la libre disposition du droit d'usage et atteinte disproportionnée au droit de propriété : violation de l'article premier du premier Protocole additionnel à la Convention européenne des droits de l'homme. Adhésion forcée aux ACCA. Atteinte disproportionnée à la liberté d'association : violation de l'article 11 de la CEDH. Discrimination fondée sur la fortune foncière au sens de l'article 14 de la CEDH combiné avec l'article premier du Protocole et l'article 11 de la CEDH. Violation du droit à la liberté de conscience et de manifester ses convictions (art. 9 de la CEDH) : rejet de la demande d'examen sous cet angle. Cour européenne des droits de l'homme, 29 avril 1999, Chassagnou et autres c/ France. Avec note
No full textWinisdoerffer Yves. Loi Verdeille du 10 juillet 1964. Apport forcé des droits de chasse sur les terrains à une ACCA. Propriétaires opposés à la pratique de la chasse. Limitations à la libre disposition du droit d'usage et atteinte disproportionnée au droit de propriété : violation de l'article premier du premier Protocole additionnel à la Convention européenne des droits de l'homme. Adhésion forcée aux ACCA. Atteinte disproportionnée à la liberté d'association : violation de l'article 11 de la CEDH. Discrimination fondée sur la fortune foncière au sens de l'article 14 de la CEDH combiné avec l'article premier du Protocole et l'article 11 de la CEDH. Violation du droit à la liberté de conscience et de manifester ses convictions (art. 9 de la CEDH) : rejet de la demande d'examen sous cet angle. Cour européenne des droits de l'homme, 29 avril 1999, Chassagnou et autres c/ France. Avec note . In: Revue Juridique de l'Environnement, n°3, 1999. pp. 431-460
Models of giant planet formation with migration and disc evolution
No full textWe present a new model of giant planet formation that
extends the core-accretion model of Pollack et al. (1996, Icarus, 124, 62)
to include migration, disc evolution and gap formation.
We show that taking these effects into account can lead
to much more rapid formation of giant planets, making
it compatible with the typical disc lifetimes inferred
from observations of young circumstellar discs.
This speed up is due to the fact that migration prevents
the severe depletion of the feeding zone as observed in
in situ calculations. Hence, the growing planet is
never isolated and it can reach cross-over mass on a much
shorter timescale. To illustrate the range of planets that
can form in our model, we describe a set of simulations in
which we have varied some of the initial parameters and
compare the final masses and semi-major axes with those
inferred from observed extra-solar planets.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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