197,620 research outputs found
Early Metal Age interactions in Island Southeast Asia and Oceania: jar burials from Aru Manara, northern Moluccas
No full textNew evidence from the rockshelter site of Aru Manara, on the island of Morotai, in the northern Moluccas, East Indonesia, suggests an earlier than previously assumed date for extensive interactions between this area of Southeast Asia and the wider Pacific. Shared mortuary customs and associated ceramic grave goods, along with other practices such as megalithic traditions, appear to start in the Late Neolithic, but become more widespread and consolidated in the Early Metal Age. Excavations at Aru Manara show that the northern Moluccas may have figured prominently in the newly established network of interaction evidenced at this time, making it an important location in the spread and dispersal of people and culture throughout Island Southeast Asia and into Oceania.No Full Tex
Il professor Manara Valgimigli alla Biblioteca Classense di Ravenna (1948-1955)
No full textStroia della bibliotec Classense attraverso l'operato del prof. Manara Valgimigli. Notizie su Ravenna e sull'archivio del professor
Il punto di vista dell’infermiere. Le sfide dell’alterità culturale al sapere medico-infermieristico
No full textComparison between instrumental sunshine duration and surface solar radiation trends for Italy over the period 1959-2013
No full textA dataset of quality checked and homogenized Italian instrumental sunshine duration (SD) and surface solar radiation (SSR) records has been set up collecting data from different sources, and the regional records for North and South Italy are obtained for both the variables. The trends refer to the period 1936-2013 for SD and to the period 1959-2013 for SSR. The SD records show an increasing tendency starting at the beginning of 1980s (i.e. brightening) and a decreasing tendency (i.e. dimming) in the previous period, which is, however, less evident than the more recent brightening, especially in northern Italy [Manara et al., 2015]. The SSR series show a decrease until the mid of 1980s and a following increase until the end of the series in all seasons with the only exception
of summer in the North where the dimming period is very weak and winter and autumn in the South where the brightening periods is not significant. The comparison between the two variables over the common period (1959-2013) shows some discrepancies in the magnitude of the trends, especially during the dimming period with a more intense and significant tendency for SSR than for SD. Another peculiarity of the SSR trends with respect to the ones obtained from SD is a shift of the trend reversal from the mid of 1980s to the beginning of 1980s. The correlations between the two variables for the annual mean are 0.65 and 0.50 for the North and the South respectively. At seasonal scale they range between 0.71 (autumn) and 0.88 (spring) in the North and between 0.58 (autumn) and 0.75 (spring) in the South. A more detailed understanding of differences highlighted by the comparison between SD and SSR records needs further research, based as an example on the comparison of the trends obtained also under clear-sky conditions. Nevertheless, the obtained results are in agreement with those reported in literature where the discrepancies observed during the dimming period are supposed to be caused by a different sensitivity of the two variables to the increase of aerosols concentration and/or to changes in cloud cover
The (M)over-bar-M-* relation of pre-main-sequence stars: a consequence of X-ray driven disc evolution
No full textWe analyse current measurements of accretion rates on to pre-main-sequence stars as a function of stellar mass, and conclude that the steep dependence of accretion rates on stellar mass is real and not driven by selection/detection threshold, as has been previously feared. These conclusions are reached by means of statistical tests including a survival analysis which can account for upper limits. The power-law slope of the (M) over dot-M-* relation is found to be in the range of 1.6-1.9 for young stars with masses lower than 1M(circle dot). The measured slopes and distributions can be easily reproduced by means of a simple disc model which includes viscous accretion and X-ray photoevaporation. We conclude that the (M) over dot - M-* relation in pre-main-sequence stars bears the signature of disc dispersal by X-ray photoevaporation, suggesting that the relation is a straightforward consequence of disc physics rather than an imprint of initial conditions
Spinal cord infarction due to fibrocartilaginous embolization: the role of diffusion weighted imaging and short-tau inversion recovery sequences.
No full textFibrocartilaginous embolization is a rare cause of ischemic myelopathy caused by embolization of intersomatic disk nucleus pulposus into spinal vasculature during Valsalva-like maneuvers. Diagnostic criteria are based on patients clinical history, magnetic resonance evidence of T2-hyperintense spinal cord lesion, and exclusion of other causes of ischemic myelopathy. These criteria do not take into account the development of magnetic resonance techniques able to enhance signal abnormalities within the neighboring intersomatic disc or vertebral body and to early characterize central nervous system lesions according to the presence of cytotoxic edema. We present 2 pediatric cases of progressive paraplegia attributed to fibrocartilaginous embolization in which short-tau inversion recovery and diffusion-weighted imaging sequences played a pivotal role showing the ischemic nature of spinal cord lesions. Due to its specificity, diffusion-weighted imaging should be included in the magnetic resonance criteria of fibrocartilaginous embolization and in standard magnetic resonance analysis when dealing with acute transverse myelopathy. © The Author(s) 2010
Reconstructing sunshine duration and solar radiation long-term evolution for Italy: a challenge for quality control and homogenization procedures
No full textIn the last two decades, the scientific community has become aware of the fact that the real climate signal in original series of meteorological data is generally hidden behind non-climatic noise caused by a number of factors. Time series of meteorological data can therefore not be used for climate research without facing this issue. In this context, we have recently set up a database of Italian sunshine duration and solar radiation daily records and we have subjected them to a detailed quality check and homogenization procedure. Moreover, as the records are rather sparse and a significant fraction of them have wide gaps, we completed the data and set up a procedure in order to obtain at first a gridded version of the dataset and then average records that are representative of the entire Italian territory. The paper will highlight the main steps of the methodology that allowed us to get these average quality-checked and homogenized records and will discuss some open issues
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