Search results for "198"
showing 10 items of 334 documents
3D MHD modeling of the expanding remnant of SN 1987A : role of magnetic field and non-thermal radio emission
2018
Aims. We investigate the role played by a pre-supernova (SN) ambient magnetic field on the dynamics of the expanding remnant of SN 1987A and the origin and evolution of the radio emission from the remnant, in particular, during the interaction of the blast wave with the nebula surrounding the SN. Methods. We model the evolution of SN 1987A from the breakout of the shock wave at the stellar surface to the expansion of its remnant through the surrounding nebula by 3D MHD simulations. The model considers the radiative cooling, the deviations from equilibrium of ionization, the deviation from temperature-equilibration between electrons and ions, and a plausible configuration of the pre-SN ambie…
Supernova 1987A: a Template to Link Supernovae to their Remnants
2015
The emission of supernova remnants reflects the properties of both the progenitor supernovae and the surrounding environment. The complex morphology of the remnants, however, hampers the disentanglement of the two contributions. Here we aim at identifying the imprint of SN 1987A on the X-ray emission of its remnant and at constraining the structure of the environment surrounding the supernova. We performed high-resolution hydrodynamic simulations describing SN 1987A soon after the core-collapse and the following three-dimensional expansion of its remnant between days 1 and 15000 after the supernova. We demonstrated that the physical model reproducing the main observables of SN 1987A during …
Predictores socio-contextuales y motivacionales de la intención de continuar participando: Un análisis desde la SDT en danza. (Social-contextual and …
2011
En el marco de la Teoria de la Autodeterminacion (Deci y Ryan, 1985; 2000), se estudiaron los predictores socio-contextuales y motivacionales de la intencion de seguir practicando danza, y el papel del burnout en estas relaciones, poniendo a prueba dos modelos de ecuaciones estructurales. Los participantes, 197 bailarines vocacionales, completaron los cuestionarios con las variables clave de interes. Los resultados revelaron que las percepciones del apoyo a la autonomia ofrecidas por el profesor de danza actuo como predictor positivo de la motivacion autonoma (motivacion intrinseca, regulacion integrada y regulacion identificada) y como predictor negativo de la motivacion controlada (regula…
A propósito de Orwell 1984 : Calificar de profecias a su vehemente panfleto es impropio
1983
Son las respuestas de José Vidal-Beneyto a una entrevista que no llegó a publicarse. No se tienen datos sobre la publicación a la que iba destinada.
A propósito de Orwell 1984 : Calificar de profecias a su vehemente panfleto es impropio
1983
Son las respuestas de José Vidal-Beneyto a una entrevista que no llegó a publicarse. No se tienen datos sobre la publicación a la que iba destinada.
Percepción de las estrategias que emplean los profesores para mantener la disciplina, razones de los alumnos para ser disciplinados y comportamiento …
2011
Este trabajo ha relacionado la percepcion de las estrategias de los profesores para la disciplina, las razones de los alumnos para ser disciplinados y su comportamiento en educacion fisica (EF). Participaron 2189 adolescentes de 13 a 17 anos, que respondieron cuestionarios sobre estrategias para mantener la disciplina, razones para la disciplina y disciplina-indisciplina en EF. La edad y el genero de los alumnos son variables diferenciadoras, mientras que la interaccion genero de los alumnos x genero de los profesores no aporta diferencias significativas. Los analisis de regresion han mostrado que las razones intrinsecas de los alumnos y de los profesores y las razones responsables y de pre…
Zvaigžņotā Debess: 2017/18, Ziema (238)
2017
Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: I.Vilka. Starry Sky and Birds’ Journeys (abridged) ; N.Cimahoviča. Spirals of Saturn’s Rings (abridged) ; I.Šmelds. V Readings of Friedrich Zander ; DEVELOPMENTS in SCIENCE: K.Schwartz. Most Distant Galaxy Clusters and 3D Structure of the Universe ; DISCOVERIES: M.Gills. The Day when Multi-Messenger Astronomy Was Announced ; I.Pundure. ESO Telescopes and Hubble Observe the Source of Gravitational Waves for the First Time ; I.Eglītis. Asteroid “Balklavs” ; SPACE RESEARCH and EXPLORATION: R.Misa. Mission of Cassini – Discoveries to the Very End ; J.Jaunbergs. The Icy World Tethys ; OBSERVATORIES and INSTRUMENTS: M.Gills. The Giant Radio Telescope…
Study of the Ti-44(alpha, p)V-47 reaction and implications for core collapse supernovae
2014
The underlying physics triggering core collapse supernovae is not fully understood but observations of material ejected during such events helps to solve this puzzle. In particular, several satellite based γ -ray observations of the isotope 44Ti have been reported recently. Conveniently, the amount of this isotope in stellar ejecta is thought to depend critically on the explosion mechanism. The most influential reaction to the amount of 44Ti in supernovae is 44Ti(α, p)47V. Here we report on a direct study of this reaction conducted at the REX-ISOLDE facility, CERN. The experiment was performed with a 44Ti beam at Elab = 2.16 MeV/u, corresponding to an energy distribution, for reacting α-par…
A review of studies using the Körperkoordinationstest für Kinder (KTK)
2015
The Körperkoordinationstest für Kinder (KTK) (Kiphard & Schilling, 1974, 2007) is a standardized, norm-referenced measure used by physical therapists and occupational therapists in clinic and school practice settings to evaluate the motor coordination (MC) of 5- to 14-year-old children. To find out for which research purposes the KTK has been used and its reliability and validity, we conducted a systematic review. Searching five databases, we found 46 studies used the KTK over four decades. The KTK was widely used in Europe in children with typical and atypical development. The KTK was used to investigate associations, to test the effects of interventions and treatments, to identify or diag…
Reimparare il comune: A teatro dopo il 1989
2020
L'articolo coglie l’invito a recarsi a teatro con una domanda in mente: in che misura la data ‘spartiacque’ del 1989 ha influenzato, cambiato, sfidato la creazione scenica in Europa? Si tratterà di vedere in che misura la scossa dell’evento 1989 (di cui non è detto che coincida del tutto con la data 1989) permise alle arti sceniche di anticipare, nel paradossale ‘in più’ di una perdita di parola (che rintracceremo in alcuni lavori teatrali dell’epoca), una profonda trasformazione di cui viviamo oggi gli effetti.