Search results for "astronomia"
showing 10 items of 673 documents
Bibliographia astronómica et geodaética hispánica, 1795-1905 : Volumen I : Introducción, Inventario A-Z
1990
El presente volumen contiene una primera aportación a la bibliografía astronómica y geodésica española comprendida entre los años 1795 y 1905. Incluye 1.198 referencias, de las que más de la mitad son libros y folletos. //. Aquest volum conté una primera aportació a la bibliografia astronòmica i geodèsica espanyola compresa entre els anys 1795 i 1905. Inclou 1.198 referències, de les quals més de la meitat són llibres i fullets.
Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network
2019
Gravitational wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event was detected in this sear…
Deep ROSAT-HRI observation of the cD galaxy NGC 1399 in the fornax cluster: Morphology and dynamical status of the X-ray halo
2002
We present the results of a deep (167 ks) observation of the NGC 1399/NGC 1404 field obtained from data collected between 1993 and 1996 with the ROSAT High Resolution Imager. We take advantage of the 5" resolution of the HRI to study in detail the structure of the galactic halo and to relate the results to those obtained at larger scales with poorer resolution instruments. We discuss possible non-equilibrium scenarios that may explain the global halo structure. We also find evidence of interactions between the nuclear radio source and the inner gaseous halo.
Caponata, rovina di Sicilia
2019
L’articolo ricostruisce la significazione della caponata, storico piatto della cucina siciliana, a partire dalla sua dimensione simbolica di piatto locale e comunitario, passando, quindi ad analizzarne la defi- nizione dizionariale. Della caponata, si ricostruisce l’etimologia e la genealogia. A partire dall’interpretazione delle trasformazioni storiche del piatto, l’articolo avanza l’ipotesi che alla base del suo senso profondo possa essere rintracciata l’estetica romantica della rovina.
Observatory science with eXTP
2019
Disponible preprint en: arXiv:1812.04023v1 [astro-ph.HE] [v1] Mon, 10 Dec 2018 19:00:52 UTC (4,376 KB)
It Wetted my Appetite! Demographic Differences in Perceiving Gastronomy Content on Social Media : A Study of Fast Foods Restaurants in Port Harcourt
2017
Fast food chains have emerged to be a dominant sector in the Nigerian retail industry, contributing to employment generation and the nation’s GDP. In the face of dynamic competitive business landscape, this sector has continuously relied on the traditional method of communicating, engaging and retaining customers. This anachronistic approach has cut them from a profitable customer segment which relies heavily on ICT tools such as social media. Thus, the aim of this study is to examine the differences in the rate fast food chains utilize social media through professionally handling posting of gastronomy content on their social media pages. Utilising gastronomy as an emerging concept and/or t…
Enseñanza de las ciencias : revista de investigación y experiencias didácticas
2021
Este trabajo de investigación es la continuación de otro en el que se evaluaron los conocimientos astronómicos de un grupo de estudiantes (17 años) que habían recibido una enseñanza habitual de la astronomía. Aquellos resultados del grupo control se completan ahora con los obtenidos con un nuevo grupo, que ha recibido una enseñanza enmarcada en el socio-constructivismo siguiendo un programa de actividades que puede consultarse en www.astrodidactica.com, y al que se le ha realizado un diseño de tipo pre-test y post-test. El análisis de los datos ha revelado el tratamiento como muy eficaz, mostrando una mejora significativa en prácticamente todos los ítems analizados. También se ha mostrado q…
Filters design and characterization for LAD instrument onboard eXTP
2022
Copyright 2022 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited. The LAD (Large Area Detector) instrument, onboard the Sino-European mission eXTP (enhanced X-ray Timing and Polarimetry), will perform single-photon, high-resolution timing and energy measurements, in the energy range 2–30 keV, with a large collecting area. Its silicon drift detectors need shielding from NIR/Vis/UV light by astrophysical sources and the bright Ea…
Searching for differences in Swift's intermediate GRBs
2010
Gamma-ray bursts are usually classified through their high-energy emission into short-duration and long-duration bursts, which presumably reflect two different types of progenitors. However, it has been shown on statistical grounds that a third, intermediate population is needed in this classification scheme, although an extensive study of the properties of this class has so far not been done. The large amount of follow-up studies generated during the Swift era allows us to have a suficient sample to attempt a study of this third population through the properties of their prompt emission and their afterglows. Our study is focused on a sample of GRBs observed by Swift during its first four y…
Enseñanza de las ciencias : revista de investigación y experiencias didácticas
2021
Son frecuentes las aproximaciones cualitativas e intuitivas que se hacen en la escuela sobre el movimiento aparente del Sol por el firmamento que tratan de proporcionar al alumnado observaciones para que construya un modelo del sistema Sol-Tierra. El presente trabajo muestra la forma de obtener datos con mayor exactitud de manera que faciliten al alumnado una visión más amplia y profunda de dicho modelo, que lo capacite para enfrentarse y resolver problemas cotidianos y los pueda aplicar a diferentes contextos, como el cuestionamiento de situaciones sociales en las que interviene la luz solar. There are common the intuitive and qualitative approaches made in the School on the apparent movem…