Search results for " early"
showing 10 items of 329 documents
4D paleoenvironmental evolution of the Early Triassic Sonoma Foreland Basin (western USA)
2017
In the wake of the Mesozoic, the Early Triassic (~251.95 Ma) corresponds to the aftermath of the most severe mass extinction of the Phanerozoic: the end-Permian crisis, when life was nearly obliterated (e.g., 90% of marine species disappeared). Consequences of this mass extinction are thought to have prevailed for several millions of years, implying a delayed recovery lasting the whole Early Triassic, if not more. Several paradigms have been established and associated to a delayed biotic recovery scenario expected to have resulted from harsh and deleterious paleoenvironments. These paradigms include a global anoxia in the marine realm, a “Lilliput” effect, and the presence of “disaster” tax…
La storiografia italiana e la proiezione atlantica della Monarchia Spagnola. Alcune riflessioni
2022
Since the end of the nineteenth century, the attention of Italian historiography to the Spanish monarchy in the modern age has been a constant in political, social and economic studies. However, until the end of the last century, the attention to the ‘Atlantic dimension’ of the Monarchy was an expression of the interest of individual scholars within a panorama strongly characterized by research on the Mediterranean and European context. The passage from the 20th to the 21st century, instead, has witnessed the affirmation of new historiographical paths that adopted as an indispensable assumption the awareness of the impossibility of studying the Spanish monarchy if not in its imperial dimens…
La utilización de marfil de cachalote en el Calcolítico de Portugal
2013
Scientific analysis were undertaken within a research project concerning ivory objects from the Chalcolithic to Early Bronze Age of the Iberian Peninsula. In several of the analyses of objects from Portuguese Estremadura, especially V-perforated buttons, we could detect for the first time the presence of sperm whale ivory. This highlights the advantage and necessity of scientific analysis of ivory. It also clearly demonstrates that not all ivory used was ivory from African or Asian elephants, but we also did find ivory from the extinct Elephas antiquus, the hippopotamus and in this case sperm-whale. Thus, already in the Chalcolithic the raw material provenience was highly diverse, which in …
Photometric and spectroscopic variability of the B5IIIe star HD 171219
2017
We analyzed the star HD 171219, one of the relatively bright Be stars observed in the seismo field of the CoRoT satellite, in order to determine its physical and pulsation characteristics. Classical Be stars are main-sequence objects of mainly B-type, whose spectra show, or have shown at some epoch, Balmer lines in emission and an infrared excess. Both characteristics are attributed to an equatorially concentrated circumstellar disk fed by non-periodic mass-loss episodes (outbursts). Be stars often show nonradial pulsation gravity modes and, as more recently discovered, stochastically excited oscillations. Applying the CLEANEST algorithm to the high-cadence and highly photometrically precis…
Pandemetrics: systematically assessing, monitoring, and controlling the evolution of a pandemic
2022
AbstractThe still ongoing pandemic of SARS-CoV-2 virus and COVID-19 disease, affecting the population worldwide, has demonstrated the need of more accurate methodologies for assessing, monitoring, and controlling an outbreak of such devastating proportions. Authoritative attempts have been made in traditional fields of medicine (epidemiology, virology, infectiology) to address these shortcomings, mainly by relying on mathematical and statistical modeling. However, here, we propose approaching the methodological work from a different, and to some extent alternative, standpoint. Applied systematically, the concepts and tools of statistical engineering and quality management, developed not onl…
Tell Shiyukh Tahtani, Syria Report of the 2006-09 Seasons
2012
The Italian excavations at Shiyukh Tahtani have recently resumed, revealing a long occupation sequence on the mound’s eastern slope (Area CD). In Trench D23, on the summit, an Iron Age level II building contained a rich array of pottery, sheep knuckle bones, clay ‘bobbins’ and an unstratified Egyptian scarab of Menkheperre. An earlier massive building (LBA ?) was also excavated below the Iron Age II occupation. Halfway down the slope the lower level of a large burnt complex of Middle Bronze I date contained rich finds and various burials characterized by peculiar rituals. Finally, in a deep trench down below the slope, EB I-II remains included niched mud-brick architecture of fine Mesopo…
Early Syrian Bottles
2014
Near Eastern archaeologists are accustomed today to labelling as “Syrian bottles” various kinds of oil/perfume fasks that enjoyed a wide popularity in Syria during the 3rd millennium. Owing to the volatile nature of their contents and the lack of archeometric analysis it has not been possible so far to ascertain whether these vessels were scent or unguent vases. Whatever the case, since they have been found far afeld from the core region of production it is clear that they were a luxury item of long-distance trade and are thus today – if possible misattributions are discarded – a valuable indicator of exchange networks and for establishing synchronisms among distant areas of the ancient Nea…
An analytical model of a new packet marking algorithm for TCP flows
2005
In Differentiated Services networks, packets may receive a different treatment according to their Differentiateo Services Code Point (DSCP) label. As a consequence, packet marking schemes can also be devised to differentiate packets belonging to a same TCP flow, with the goal of improving the performance experienced. This paper presents an analytical model for an adaptive packet marking scheme proposed in our previous work. The model combines three specific sub-models aimed at describing (i) the TCP sources aggregate, (ii) the marker, and (iii) the network status. Preliminary simulation results show quite accurate predictions for throughput and average queue occupancy. Besides, the research…
Tell Shiyukh Tahtani. New light on the Bronze Age sequence
2014
This report briefly describes the latest results of the Italian rescue excavations at Shiyukh Tahtani on the Upper Syrian Euphrates. Fieldwork continued on the eastern slope of the mound, aiming to further investigate the Bronze Age levels. A main operation, halfway down the slope, focused upon the earliest MB I layers, where a group of burials was unearthed, mostly consisting of adult interments in oval pits and child pot burials. A most striking finding was the ‘Spinstress tomb’. At the foot of the slope, the exploration of a mud-brick compound, dating back to the early third millennium BC, continued. Here further remarkable evidence of massive domestic architecture in a fine Mesopotamian…
Plain and luxury wares of the third millennium BC in the Carchemish region: two case-studies from Tell Shiyukh Tahtani
2007
In the last decades the large number of salvage excavations undertaken in north Syria and southeastern Anatolia has generated much interest regarding the role that the culture of the Big Bend of the Euphrates River played during the 3rd millennium BC. the aim of the present paper is to examine some particular pottery assemblages of the second half of the 3rd millennium which can be relevant for a discussion about a putative Carchemish region in the Early Bronze Age.