Search results for " format"
showing 10 items of 2156 documents
New Insight on Archaeological Metal Finds, Nails and Lead Sheathings of the Punic Ship from Battle of the Egadi Islands
2023
The wreck of the Punic ship exhibited at the Archaeological Park of Lilybaeum (Marsala, Italy) is a unique example in the world. In this paper, the investigation of some metal finds (30 nails and 3 fragments of sheathings) belonging to the wreck of the Punic ship is reported. Portable X-ray fluorescence and Raman spectroscopy allowed us to identify the elements and compounds constituting them and make some deductions about their composition. X-ray diffractometry, polarised optical microscopy and scanning electron microscopy of the collected micro-samples allowed us to explain the degradation that occurred in the underwater environment.
Eficacia de la retroalimentación formativa para mejorar estrategias de competencia lectora en enseñanza secundaria
2013
El objetivo general de la presente tesis doctoral es analizar la efectividad de la retroalimentación formativa para mejorar estrategias de competencia lectora en estudiantes de Enseñanza Secundaria. La investigación actual (Vidal-Abarca, Mañá y Gil, 2010) y los resultados de la evaluación del programa PISA (OECD, 2010), han mostrado que es necesario diseñar intervenciones para fomentar que los estudiantes españoles se conviertan en lectores competentes. La retroalimentación formativa constituiría un procedimiento instruccional apropiado para promover la adquisición de estrategias de auto-regulación dirigidas a mejorar la competencia lectora (Butler y Winne, 1995). Específicamente, el presen…
Apprendere come insegnare ai bambini a comporre testi sintetici e chiari
2022
Nella scuola primaria l’itinerario di conquista della capacità di comporre testi chiari, corretti e significativi, è spesso denso di difficoltà che finiscono con il rallentare le diverse acquisizioni dell’alunno; in mancanza di interventi tempestivi le problematiche si riversano negli ordini di scuola successivi. La scrittura è un processo costruttivo e dinamico che vede l’apprendista scrittore impegnato in un compito di risoluzione di problemi, con lo scopo di realizzare un testo che risulti comprensibile, semplice nella struttura e completo nel suo senso. Se adeguatamente stimolato, l’alunno impara a progettare il testo, a pianificare e organizzare le informazioni, a sintetizzare gli argo…
Situazioni didattiche per pensare e ripensare criticamente la conoscenza
2022
Un obiettivo fondamentale da considerare a scuola come all’università è l’esercizio della capacità critica. Le abilità di pensiero critico sono sempre più necessarie per insegnare ai giovani a comprendere, a pensare meglio usando strategie di controllo ed autoanalisi della conoscenza. Il pensiero critico è importante nei contesti sociali e interpersonali in cui devono essere assunte scelte adeguate, autonome e indipendenti. Leggere e scrivere sono strumenti che aiutano gli studenti a ripensare e chiarire, discernere e valutare, interpretare significati in rapido cambiamento. Dopo una breve rassegna di studi, sono approfonditi gli obiettivi e le azioni per potenziare il pensiero critico negl…
Resolving the Fe XXV triplet with Chandra in Centaurus X-3
2005
We present the results of a 45 ks Chandra observation of the high-mass X-ray binary Cen X-3 at orbital phases between 0.13 and 0.40 (in the eclipse post-egress phases). Here we concentrate on the study of discrete features in the energy spectrum at energies between 6 and 7 keV, that is, on the iron K alpha line region, using the High Energy Transmission Grating Spectrometer (HETGS) on board the Chandra satellite. We clearly see a K alpha neutral iron line at similar to 6.40 keV and were able to distinguish the three lines of the Fe xxv triplet at 6.61, 6.67, and 6.72 keV, with equivalent widths of 6, 9, and 5 eV, respectively. The equivalent width of the Ka neutral iron line is 13 eV, an or…
Biogenic Fenton process - A possible mechanism for the mineralization of organic carbon in fresh waters.
2020
To explore the mechanisms that mineralize poorly bioavailable natural organic carbon (OC), we measured the mineralization of OC in two lake waters over long-term experiments (up to 623 days) at different pH and iron (Fe) levels. Both the microbial and photochemical mineralization of OC was higher at pH acidified to 4 than at the ambient pH 5 or an elevated pH 6. During 244 days, microbes mineralized up to 60% of OC in the 10-mu m filtrates of lake water and more than 27% in the 1-mu m filtrates indicating that large-sized microbes/grazers enhance the mineralization of OC. A reactivity continuum model indicated that the acidification stimulated the microbial mineralization of OC especially i…
Development and use of computational tools for modelling negative hydrogen ion source extraction systems
2013
Entrenamiento en remediación cognitiva y habilidades emocionales en formato grupal para pacientes con obesidad: un estudio piloto
2017
Abstract: Group cognitive remediation and emotion skills training for patients with obesity. A pilot study. Cognitive remediation and emotion skills training was initially designed by the Tchanturia group for individual intervention in patients with eating disorders. The purpose of the present study is to present its adaptation to patients with obesity in group format. It is structured in 8 weekly sessions that work on central executive functions, the relation between emotion and thought, and emotion regulation in oneself and others. In addition, we present the preliminary results of its application to a group of 5 participants with morbid obesity to assess its possible efficacy. The result…
Lyman break and ultraviolet-selected galaxies at z ̃ 1-I. Stellar populations from the ALHAMBRA survey
2013
We take advantage of the exceptional photometric coverage provided by the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA survey in the optical and near-infrared to analyse the physical properties of a sample of 1225 GALEX-selected Lyman break galaxies (LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field. This is the largest sample of LBGs studied in this redshift range to date. According to a spectral energy distribution (SED) fitting with synthetic stellar population templates, we find that LBGs at z ̃ 1 are mostly young galaxies with a median age of 341 Myr and have intermediate dust attenuation, (Es(B - V)) ̃ 0.20. Owing to the selection criterion, LBGs at z ̃…
Special Features of the Hippocampal Formation with Respect to Seizure Conditions
1987
The hippocampus has long been known as a region particularly prone to epileptiform discharges (Kandel et al. 1961). Connections and physiology of this archaic cortical structure are relatively well charac-terized and a wealth of information on features favoring exaggerated neuronal activity has emerged in recent years. The lamellar organization of the hippo-campus (Andersen et al. 1971) may be one of these features; it certainly has facilitated their investigation. Tissue slices cut along the lamellae, perpendicular to the axis of the structure, contain a relatively undisturbed chain of neurons which can be rigorously investigated in vitro. The results from such experiments have allowed mod…