131,444 research outputs found
Mostra "Ugo Mulas"
No full textAllestimento della mostra dedicata al fotografo Ugo Mulas presso la galleria d el MAXXI (Museo delle arti del XX secolo)a Rom
Geochemical features of thermal waters at Benetutti (Sardinia)
No full textThis paper reports the geochemistry of the thermal and cold waters at Benetutti in central Sardinia. Both major and trace components in 24 water samples were analysed using various techniques. The thermal waters show a sodium chloride composition and a salinity of 0.5 g/L; they are characterised by a pH of 9.5-9.7, very low magnesium (0.01-0.1 mg/L), and much higher F, B, Li, Rb, Cs, and Mo concentrations than in the cold waters of the area. No variations in temperature, flow, or chemical composition were observed at the thermal springs for which records dating back 20 years are available. Subsurface reservoirs associated with the thermal springs are of a low enthalpy (calculated temperature at depth is about 60°C), and are therefore candidates for direct uses, such as balneology, space heating, and horticulture
Numerical iterative analysis for vehicle-bridge dynamic interaction
No full textabstract in: D. Bismor, M.I. Michalczyk, M. Pawelczyk, J. Ciešlik eds., “The Sixteenth International Congress on Sound and Vibration, Krakow, Poland, 5-9 July, 2009, Program and Book of abstracts”, pag. 108, ISBN 978-83-60716-72-
Caratterizzazione di linee di piante legnose della riserva di Monte Arcosu utilizzabili per l’ecocertificazione vivaistica
No full textThe D-1 antagonist SCH 23390 stimulates while the D-1 agonist SKF 38393 fails to affect dopamine release in the dorsal caudate of freely moving rats.
No full textSCH 23390, from doses of 0.012 mg/kg s.c., dose dependently stimulated the release of dopamine (DA) and the output of its metabolites, dihydroxyphenylacetic acid and homovanillic acid, in the dorsal caudate of freely moving rats implanted with transcerebral dialysis fibers. SKF 38393 failed to modify DA release and metabolism at doses of 5, 10 and 25 mg/kg s.c. but at 25 mg/kg s.c. it abolished the effect of 0.025 mg/kg of SCH 23390. Administration of gamma-butyrolactone (700 mg/kg s.c.), which blocks the firing of DA neurons, prevented the effect of 0.050 mg/kg s.c. SCH 23390. The results indicate that D-1 receptors control the release of DA, probably through stimulation of the firing of DA neurons
Compañero presidente
No full textVolume unito ai 2 DVD dei documentari "Salvador Allende" e “La memoria ostinata” del regista cileno Patricio Guzmán (1941). Contiene saggi di D. Manera, L. Aguzzi, A. Mulas, racconti e testimonianze degli scrittori cileni V. Vidal, D. Muñoz Valenzuela, F. Jerez e M. Faunes Amigo (tradotti da D. Manera), e un testo di S. Allende
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Diagnostics for specific PAHs in the far-IR: Searching neutral naphthalene and anthracene in the Red Rectangle
No full textContext.In the framework of the interstellar polycyclic aromatic hydrocarbons
(PAHs) hypothesis, far-IR
skeletal bands are expected to be the fingerprints of single species in
this class.
Aims.We address the question of detectability of low energy PAH vibrational
bands, with respect to spectral contrast and intensity ratio with “classical”
Aromatic Infrared Bands (AIBs).
Methods.We extend our established Monte Carlo model of the photophysics of
specific PAHs in astronomical environments to include rotational and
anharmonic band structure. The required molecular parameters were
calculated in the framework of the Density Functional Theory.
Results.We calculate the detailed spectral profiles of three low-energy vibrational
bands of neutral naphthalene and four low-energy vibrational bands of
neutral anthracene. They are used to establish detectability constraints
based on intensity ratios with “classical” AIBs. A general procedure is
suggested to select promising diagnostics and tested on available
Infrared Space Observatory data for the Red Rectangl
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