Search results for " Migrations"
showing 10 items of 26 documents
Smithian shoreline migrations and depositional settings in Timpoweap Canyon (Early Triassic, Utah, USA).
2014
AbstractIn Timpoweap Canyon near Hurricane (Utah, USA), spectacular outcrop conditions of Early Triassic rocks document the geometric relationships between a massive Smithian fenestral-microbial unit and underlying, lateral and overlying sedimentary units. This allows us to reconstruct the evolution of depositional environments and high-frequency relative sea-level fluctuations in the studied area. Depositional environments evolved from a coastal plain with continental deposits to peritidal settings with fenestral-microbial limestones, which are overlain by intertidal to shallow subtidal marine bioclastic limestones. This transgressive trend of a large-scale depositional sequence marks a lo…
The spread of steppe and Iranian-related ancestry in the islands of the western Mediterranean
2020
Steppe-pastoralist-related ancestry reached Central Europe by at least 2500 bc, whereas Iranian farmer-related ancestry was present in Aegean Europe by at least 1900 bc. However, the spread of these ancestries into the western Mediterranean, where they have contributed to many populations that live today, remains poorly understood. Here, we generated genome-wide ancient-DNA data from the Balearic Islands, Sicily and Sardinia, increasing the number of individuals with reported data from 5 to 66. The oldest individual from the Balearic Islands (~2400 bc) carried ancestry from steppe pastoralists that probably derived from west-to-east migration from Iberia, although two later Balearic individ…
Abitare i luoghi dell'integrazione
Il tema che la ricerca in questione indaga, riguarda l’abitare posto in relazione agli imponenti flussi migratori che si susseguono nelle città e che, configurano nuove pratiche sociali e urbane. La storia ci mostra come, da sempre, lo spostamento dei popoli abbia determinato sviluppi sia dal punto di vista demografico, storico, culturale, economico all’interno dei paesi ma, allo stesso tempo, ha modificato lo spazio urbano, in quanto portatori di culture tradotti in forme. Si pensi infatti, alle tante testimonianze, ancora presenti nelle città, in cui sono evidenti le diverse influenze (dal popolo greco, romano, arabo, ebreo, etc) che si pongono come valore di memoria e continuità. Rispett…
Modeling Local Social Migrations: A Cellular Automata Approach
2015
In local social migrations, agents move from their initial location looking for a better local social environment. Social migrations processes do not change the number of social agents of a given type (i.e., the empirical distribution of the population) but their spatial location. Although cellular automata seems to appear as a natural approach to model of social migrations, the evolution of the configuration through a cellular automata might induce a new configuration wherein the number of agents of each type might be actually modified. This article provides a characterization of these cellular automata rules such that for any initial empirical distribution, the evolution of the configurat…
Foreign Migration of Poles in Scientific Research at the Turn of Century
2008
Foreign Migration of Poles in Scientific Research at the Turn of CenturyThe article deals with problems related to present foreign migrations of Poles. The attention is concentrated on presenting scientific research results in this sphere indicating many problems caused by migrations not only in the social, demographic and economic spheres but also in political and cultural spheres thus enabling scientists to understand better this complex and multidimensional phenomenon.
Northern Tungus migrations in the Far East: Goldi and their ethnical affinities
1926
"From The Journal of the North China Branch of the Royal Asiatic Society, Volume LVII.-1926."
Floristic affinities between the somali and the mediterranean regions
1988
The phytogeographical connections between Somalia and the Mediterranean Region were analyzed. 99 families and about 300 genera turned out to be common to the two areas, representing 67 per cent of the families and 32 per cent of the genera in the whole Somali flora. If considering only the flora of the northern portion of Somalia, these values respectively reach 76 per cent of the families and 40 per cent of the genera. Furthermore several species are common to the two areas, some showing continuous distribution between eastern Africa and the Mediterranean Region, while others have strongly disjunct distribution.
DETERMINANTS OF EDUCATIONAL ADVANCEMENT OF RURAL AREAS IN POLAND
2017
The article is an aimed attempt at the diagnosis and evaluation of the educational level (character) of rural population in Poland perceived as educational advancement as well as of its environment (background). Growing importance of education in improving professional opportunities, changing educational aspirations and parents’ support as well as positive internal migration trends were emphasised. Rural regions are still lagging behind urban areas, though optimistic characteristics indicate receding stigmatisation and marginalisation of the Polish country with internal migration of young and educated individuals, including affluent ones (potential luxury goods buyers), to rural area…
Gli Albanesi in Istria (secc. XV-XVIII)
2020
Albanian emigration was a historic phenomenon which extended over a long period, and of which different countries of the inter-Adriatic area were the final destination. Besides different regions in present-day Italy, Istria as well constituted a destination. The Albanians arrived there at the end of the 15th century. According to documents from archives, the Istrian settlement displays the connotations of similar migrations – though the latter were much more complex – across the Italian peninsula. Documents reflect the common organisational skills of various groups of migrants.
UNC-52/perlecan affects gonadal leader cell migrations in C. elegans hermaphrodites through alterations in growth factor signaling.
2003
0012-1606 doi: DOI: 10.1016/S0012-1606(03)00014-9; The unc-52 gene of Claenorhabditis elegans encodes a homologue of the basement membrane heparan sulfate proteoglycan perlecan. Viable alleles reduce the abundance of UNC-52 in late larval stages and increase the frequency of distal tip cell (DTC) migration defects caused by mutations disrupting the UNC-6/netrin guidance system. These unc-52 alleles do not cause circumferential DTC migration defects in an otherwise wild-type genetic background. The effects of unc-52 mutations on DTC migrations are distinct from effects on myofilament organization and can be partially suppressed by mutations in several genes encoding growth factor-like molecu…