57 research outputs found
Uliano Lucas, Revoluções. Guiné Bissau, Angola e Portugal (1969-1974), a cura di Elisa Alberani, Miguel Cardina e Vincenzo Russo
No full textUliano Lucas, Revoluções. Guiné Bissau, Angola e Portugal (1969-1974), a cura di Elisa Alberani, Miguel Cardina e Vincenzo Russo (Lisboa, Edições do Saguão, 2023, 183 pp. ISBN 978-989-35051-0-6)
di Marianna Scaramucci
Uliano Lucas, Revoluções. Guiné Bissau, Angola e Portugal (1969-1974), a cura di Elisa Alberani, Miguel Cardina e Vincenzo Russo
(Lisboa, Edições do Saguão, 2023, 183 pp. ISBN 978-989-35051-0-6)
di Marianna Scaramucci
 
A ocupação do Vale do Côa pelo homem de Neandertal: o Sítio Arqueológico da Cardina Salto Do Boi (Vila Nova De Foz Côa, Portugal) como caso de estudo
No full textA caraterização tecno-tipológica das indústrias líticas recolhidas nas sondagens H, Z e N (18 m²) do sítio arqueológico
da Cardina-Salto do Boi, no vale do Rio Côa, conjugada com o estudo da gestão das respetivas matérias-primas, permitiu
identificar três ocupações do Paleolítico Médio, datadas de (1) ca. 155 ka BP a ca. 80 ka BP, (2) ca. 80 ka BP a 51 ka BP e
(3) 51 ka BP a 39 ka BP. Permitiu, também, reconhecer uma sequência de ocupações do Paleolítico Superior, sobrepostas
estratigraficamente às do Paleolítico Médio, posteriores a 34 ka BP, bem como mistura de materiais líticos dos dois períodos em
unidades estratigráficas das sondagens Z e N, datadas do intervalo compreendido entre 39 ka BP e 34 ka BP.
Dado que o sítio arqueológico da Cardina-Salto do Boi é, até ao momento, o único no Vale do Côa com uma sequência de
vestígios da presença humana que vai do MIS 6 (ca. 190 ka BP a ca. 140 ka BP) ao MIS 1 (11,7 ka BP ao presente), o seu estudo
revela-se da máxima importância, uma vez que contribui para a compreensão diacrónica da exploração do território por parte
do Homem de Neandertal e do Homem Anatomicamente Moderno.The techno-typological characterization of the lithic industries from trenches H, Z, and N (18 m²) from the Cardina-Salto do
Boi archaeological site, in the Côa River valley, combined with the study of the lithic resource management, made it possible
to identify three Middle Palaeolithic occupations, dating from (1) ca. 155 ka BP to ca. 80 ka BP, (2) ca. 80 ka BP to 51 ka BP,
and (3) 51 ka BP to 39 ka BP. It also allowed the recognition of a succession of Upper Paleolithic occupations, after 34 ka BP,
stratigraphically overlapping those from the Middle Paleolithic, as well as a mixture of lithic artifacts from both periods in
stratigraphic units of the Z and N trenches, dated to the interval between 39 ka BP and 34 ka BP.
Since the Cardina-Salto do Boi archaeological site is, to date, the only one in the Côa Valley with a succession of occupations
ranging from MIS 6 (ca. 190 ka BP to ca. 140 ka BP) to MIS 1 (11.7 ka BP to the present), its study proves to be of utmost
importance, as it contributes to the understanding of the strategies for exploring the territory carried out by the Neanderthals
and Anatomically Modern Humans
Timing of the Middle-to-Upper Palaeolithic transition in the Iberian inland (Cardina-Salto do Boi, Côa Valley, Portugal)
No full textThe timing of the Neanderthal-associated Middle Palaeolithic demise and a possible overlap with anatomically modern humans (AMH) in some regions of Eurasia continues to be debated. The Iberian Peninsula is considered a possible refuge zone for the last Neanderthals, but the chronology of the later Middle Palaeolithic record has undergone revision and has increased the debate on the timing of Neanderthal extinction. Here we report on a study of the 5-m-thick archaeological stratigraphy of the Cardina-Salto do Boi, an open-air site located in inland Iberia, from which optically stimulated luminescence (OSL) ages were obtained for Middle and Upper Palaeolithic occupations preserved in overbank alluvial deposits. Geomorphology, archaeostratigraphy, stone-tool evolution, and OSL dating support the persistence of Neanderthals after 41 ka in central Iberia; the transition between the Middle Palaeolithic material culture and the AMH-associated Aurignacian blade and bladelet production is estimated to lie between 34.0 ± 2.0 ka and 38.4 ± 1.9 ka. Our results demonstrate that investigations focusing on different geomorphological situations are necessary to overcome the current limitations of the evidence and to establish more consistent models for Neanderthal disappearance and AMH expansion in the Iberian Peninsula.info:eu-repo/semantics/publishedVersio
Caridina pseudogracilirostris sp.nov. (Atyidae: Caridina) from the Cochin Backwater
No full textA few specimens of Cardina collected from the Cochin Backwater during try net operations, resembled Caridina gracilirostris de Man in many respects. But close
examination of the material revealed that they differed from it in the shape and armature of the telson and the absence of the appendix interna on the first pleopod of male specimens. Therefore, a new species Cardina pseudogracilirostris is proposed to describe the
animal. Detailed discription of the new species and its affinities to allied species are given in the present note
Le mappe perdute: il Portogallo e le rovine della memoria imperiale
No full textLa memoria delle guerre coloniali e del colonialismo, la riconfigurazione che la Rivoluzione del 25 aprile ha implicato nell'immaginario del Portogallo sono oggetto di questa introduzione che si confronta con le eredità del passato coloniale portoghese e le sue ricadute nel presente postcoloniale
Accuracy of a Global Positioning System (GPS) for Weed Mapping
No full textExperiments were conducted to test the accuracy of a global positioning system (GPS) in measuring the area of simulated weed patches of varying size and to determine the accuracy in navigating back to particular points in a field. Circular areas of 5, 50, and 500 m2 were established and measured using point and polygon features of a GPS. The GPS estimations of the area of those patches had errors ranging from 7 to 45%, 6 to 15%, and 3 to 6%, respectively, when compared to actual measurements. As patch size increased, errors decreased. A curve describing the relationship between GPS error and patch size had an excellent fit (r2 = 0.92). The error remained the same in all measurements across all patch sizes, but composed a smaller percentage of large patches. The GPS had submeter accuracy in navigation to the correct quadrat 73% of the time, located the correct quadrat 27% of the time, and invariably navigated to within 1.58 m of the correct quadrat. The relationship between patch size and measurement error was applied to natural infestations of hemp dogbane.</jats:p
Common Cocklebur Competition in Forage Maize
No full textCommon cocklebur is a new weed in irrigated maize grown for forage in the hot, dry region of northwest Pakistan. We conducted experiments in the Khyber Pakhtunkhwa Province, Peshawar, Pakistan, during 2006 and 2007 to evaluate the interaction of common cocklebur density and maize density on biomass, leaf area index (LAI), and plant height of forage maize. Seven common cocklebur densities (0, 2, 4, 6, 8, 10, and 12 plants m−2) in maize planted at four densities (5, 7.5, 10, and 12.5 plants m−2) were evaluated. An ANOVA for both years revealed significant main effects and interactions for all variables. Regression of measured variables against common cocklebur density showed that maize biomass declined linearly as common cocklebur density increased from 0 to 12 plants m−2, with an increasing rate of decline for high maize densities and low maize densities. Combined data for all maize densities revealed that the relationship between maize biomass and common cocklebur biomass fit a linear function, with 1.28 to 1.35 kg ha−1loss in maize biomass for each kilogram per hectare increase in common cocklebur biomass from about 1,500 to 3,200 kg ha−1. Above 8 to 10 common cocklebur plants m−2, weed biomass declined, presumably due to intraspecific competition. An increase in common cocklebur density decreased maize LAI about 0.15 to 0.3 units for each additional common cocklebur plant per square meter in 2006, and 0.11 to 0.24 units in 2007. Common cocklebur LAI increased in a linear fashion as density of the weed increased. Results suggest that the effect of common cocklebur interference on maize biomass was associated with a change in allocation of resources, resulting in increased crop height growth at the expense of a reduction in LAI and presumably potential light interception by the crop as common cocklebur density increased.</jats:p
Location of the sites mentioned in the text.
No full text1. Gruta do Caldeirão. 2. Abrigo do Lagar Velho; 3. Lapa do Anecrial; 4. Lapa do Picareiro; 5. Gruta da Oliveira; 6. Gato Preto; 7. Gruta Nova da Columbeira; 8. Cardina/Salto do Boi; 9. Pego do Diabo; 10. Cova de Malladetes; 11. Cueva Antón; 12. Fica Doña Martina and Abrigo de La Boja (Rambla Perea). 13. Cueva Bajondillo. Relief map: Global Multi-Resolution Topography Synthesis (https://www.gmrt.org/GMRTMapTool/). Reproduced from [5] under a CC BY 4.0 license.</p
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