Multi-instrumental observations of the 2014 Ursid meteor outburst

The Ursid meteor shower is an annual shower that usually shows little activity. However, its Zenith hourly rate sometimes increases, usually either when its parent comet, 8P/Tuttle, is close to its perihelion or its aphelion. Outbursts when the comet is away from perihelion are not common and outbursts when the comet is close to aphelion are extremely rare. The most likely explanation offered to date is based on the orbital mean motion resonances. The study of the aphelion outburst of 2000 December provided a means of testing that hypothesis. A new aphelion outburst was predicted for 2014 December. The SPanish Meteor Network, in collaboration with the French Fireball Recovery and InterPlanetary Observation Network, set up a campaign to monitor this outburst and eventually retrieve orbital data that expand and confirm previous preliminary results and predictions. Despite unfavourable weather conditions over the south of Europe over the relevant time period, precise trajectories from multistation meteor data recorded over Spain were obtained, as well as orbital and radiant information for four Ursid meteors. The membership of these four meteors to the expected dust trails that were to provoke the outburst is discussed, and we characterize the origin of the outburst in the dust trail produced by the comet in the year AD 1392.Peer reviewe

Orbits and emission spectra from the 2014 Camelopardalids

We have analyzed the meteor activity associated with meteoroids of fresh dust trails of Comet 209P/LINEAR, which produced an outburst of the Camelopardalid meteor shower (IAU code #451, CAM) in May 2014. With this aim, we have employed an array of high-sensitivity CCD video devices and spectrographs deployed at 10 meteor observing stations in Spain in the framework of the Spanish Meteor Network (SPMN). Additional meteoroid flux data were obtained by means of two forward-scatter radio systems. The observed peak zenithal hourly rate (ZHR) was much lower than expected, of around 20 meteors h-1. Despite of the small meteor flux in the optical range, we have obtained precise atmospheric trajectory, radiant and orbital information for 11 meteor and fireball events associated with this stream. The ablation behaviour and low tensile strength calculated for these particles reveal that Camelopardalid meteoroids are very fragile, mostly pristine aggregates with strength similar to that of the Orionids and the Leonids. The mineral grains seem to be glued together by a volatile phase. We also present and discuss two unique emission spectra produced by two Camelopardalid bright meteors. These suggest a non-chondritic nature for these particles, which exhibit Fe depletion in their composition.Comment: Accepted for publication in Monthly Notices of the Royal Astronomical Society on Sept. 22, 201

EUROfusion Integrated Modelling (EU-IM) capabilities and selected physics applications

International audienceRecent developments and achievements of the EUROfusion Code Development for Integrated Modelling project (WPCD), which aim is to provide a validated integrated modelling suite for the simulation and prediction of complete plasma discharges in any tokamak, are presented. WPCD develops generic complex integrated simulations, workflows, for physics applications, using the standardized European Integrated Modelling (EU-IM) framework. Selected physics applications of EU-IM workflows are illustrated in this paper

Multi-Station Observations of the 2014 Ursid Meteor Outburst

International audienceWe set up a co-joint campaign (SPMN-FRIPON) to observe the expected Ursid meteor shower outburst of 2014. We have accurately derived the orbits of four meteors

Multi-Station Observations of the 2014 Ursid Meteor Outburst

International audienceWe set up a co-joint campaign (SPMN-FRIPON) to observe the expected Ursid meteor shower outburst of 2014. We have accurately derived the orbits of four meteors

Multi-Station Observations of the 2014 Ursid Meteor Outburst

International audienceWe set up a co-joint campaign (SPMN-FRIPON) to observe the expected Ursid meteor shower outburst of 2014. We have accurately derived the orbits of four meteors

Flicka eller pojke? Pojke eller flicka? : Perceptuell lyssnarbedömning av små barns könstillhörighet och röstegenskaper

Föreliggande studie behandlar ämnet barnröst ur ett könsperspektiv. Syftet med studien är att undersöka om det vid lyssnarbedömningar av ljudinspelade standardiserade fraser är möjligt att identifiera könstillhörighet hos barn i åldrarna 3;0-4:0 år. Fyra logopeder med lång erfarenhet inom röstlogopedi skattade rösterna beträffande kvalitet. En perceptuell lyssnarbedömning genomfördes med logopedstudenter vilka identifierade könstillhörighet korrekt i 55% av röstinspelningarna. Fördelat på kön var identifieringen av pojkarna något säkrare (60%) jämfört med flickorna (57%). Inget tydligt samband mellan skattad osäkerhet/säkerhet och angivet svar upptäcktes. Ett visst samband mellan röstkvalitet och bedömning av könstillhörighet påvisas i föreliggande studie. Det är dock svårt att att uttala sig om resultatet är generaliserbart

EUROfusion Integrated Modelling (EU-IM) capabilities and selected physics applications

International audienceRecent developments and achievements of the EUROfusion Code Development for Integrated Modelling project (WPCD), which aim is to provide a validated integrated modelling suite for the simulation and prediction of complete plasma discharges in any tokamak, are presented. WPCD develops generic complex integrated simulations, workflows, for physics applications, using the standardized European Integrated Modelling (EU-IM) framework. Selected physics applications of EU-IM workflows are illustrated in this paper