Time filter

Source Type

Luanda, Angola

The Agostinho Neto University is a public Angolan university based in the capital, Luanda. Until 2009, it had campuses in all major Angolan cities. In the academic year 2005–06, 68 licensing courses were ministered by Agostinho Neto University: 18 in Bachelor’s and 15 in Master’s degrees, involving areas of scientific knowledge in the faculties, institutes and higher learning schools. It is one of seven public universities in Angola. Until 2009 the Agostinho Neto University was the only public university, but that year it was split up and its campuses outside Luanda were transformed into six autonomous universities, in Benguela, Cabinda, Huambo, Lubango, Malange and Uíge. Today "Universidade Agostinho Neto" is reduced to the status of one regional university among others, confined to the Luanda and Bengo provinces, but even so it is the largest university in Angola. While until 2000 its only competitor had been the Catholic University of Angola, it faces at this stage the competition of about a dozen private universities. Wikipedia.

Guiraud M.,University of Burgundy | Buta-Neto A.,Agostinho Neto University | Quesne D.,University of Burgundy
Marine and Petroleum Geology | Year: 2010

We analyse tectonic and sedimentary field and subsurface data for the Angola onshore margin together with free-air gravity anomaly data for the offshore margin. This enables us to characterize the mode of syn-rift tectonism inherited from the Precambrian and its impact on the segmentation of the Angola margin. We illustrate that segmentation by the progressive transition from the Benguela transform-rifted margin segment to the oblique-rifted South Kwanza and orthogonal-rifted North Kwanza margin segments. The spatial variation in the intensity of post-rift uplift is demonstrated by the study of a set of geomorphic markers detected in the post-rift succession of the coastal Benguela and Kwanza Basins: Upper Cretaceous to Cenozoic uplifted palaeodeltas, erosional unconformities, palaeovalleys, Quaternary marine terraces and perched Gilbert deltas. The onshore Benguela transform margin has a distinctive, mainly progradational stratigraphic architecture with long-term sedimentary gaps and high-elevation marine terraces resulting from moderate Upper Cretaceous-Cenozoic to major Quaternary uplifting (i.e. 775-1775 mm/ky or m/Ma). By contrast, repeated synchronous episodes of minor Cenozoic to Quaternary uplift occurred along the orthogonal-rifted North Kwanza segment with its Cenozoic aggradational architecture, short-term sedimentary gaps and low-elevation Pleistocene terraces. Margin style likewise governs spatial variations in the volume of offshore sediment dispersed in the associated deep-sea fans. Along the low-lying North Kwanza margin, sedimentation of the broad Cenozoic to Pleistocene Kwanza submarine fan was probably governed by the width of the Kwanza interior palaeodrainage basin combined with the wet tropical Neogene climate. Along the high-rising Benguela margin, the small size of the Benguela deep-sea fan is related to the interplay between moderate continental sediment dispersal from long-lived small catchments and a warm, very arid Neogene climate. However, the driving forces behind the epeirogenic post-rift uplift of the Angola coastal bulge remain a matter of speculation. © 2010 Elsevier Ltd. Source

Bello G.,Instituto Oswaldo Cruz Fiocruz | Afonso J.M.,Instituto Oswaldo Cruz Fiocruz | Afonso J.M.,Agostinho Neto University | Morgado M.G.,Instituto Oswaldo Cruz Fiocruz
Infection, Genetics and Evolution | Year: 2012

The HIV-1 subtype F1 is exceptionally prevalent in Angola, Brazil and Romania. The epidemiological context in which the spread of HIV occurred was highly variable from one country to another, mainly due to the existence of a long-term civil war in Angola and the contamination of a large number of children in Romania. Here we apply phylogenetic and Bayesian coalescent-based methods to reconstruct the phylodynamic patterns of HIV-1 subtype F1 in such different epidemiological settings. The phylogenetic analyses of HIV-1 subtype F1 pol sequences sampled worldwide confirmed that most sequences from Angola, Brazil and Romania segregated in country-specific monophyletic groups, while most subtype F1 sequences from Romanian children branched as a monophyletic sub-cluster (Romania-CH) nested within sequences from adults. The inferred time of the most recent common ancestor of the different subtype F1 clades were as follow: Angola=1983 (1978-1989), Brazil=1977 (1972-1981), Romania adults=1980 (1973-1987), and Romania-CH=1985 (1978-1989). All subtype F1 clades showed a demographic history best explained by a model of logistic population growth. Although the expansion phase of subtype F1 epidemic in Angola (mid 1980s to early 2000s) overlaps with the civil war period (1975-2002), the mean estimated growth rate of the Angolan F1 clade (0.49year -1) was not exceptionally high, but quite similar to that estimated for the Brazilian (0.69year -1) and Romanian adult (0.36year -1) subtype F1 clades. The Romania-CH subtype F1 lineage, by contrast, displayed a short and explosive dissemination phase, with a median growth rate (2.47year -1) much higher than that estimated for adult populations. This result supports the idea that the AIDS epidemic that affected the Romanian children was mainly caused by the spread of the HIV through highly efficient parenteral transmission networks, unlike adult populations where HIV is predominantly transmitted through sexual route. © 2012 Elsevier B.V. Source

Livramento F.,Agostinho Neto University | Rangel I.M.,Instituto Nacional Of Investigacao Pesqueira
Toxicon | Year: 2010

The presence of ASP toxins in Luanda Bay, an area 2700 km apart from the closest record of this type of toxicity and with a different hydrographic regime, was studied. Two outbreaks were confirmed by LC/MS/MS with presence of domoic acid and some isomers both, in plankton and in three of the most important bivalve species from the area. Domoic acid levels in the studied bivalves were below the regulatory limits for most countries and the first estimations indicate that they depurated the toxin quickly. It is, therefore, unlikely that any intoxication would have taken place by consumption of these bivalve species. Notwithstanding, the relatively high annual frequency of the blooms together with possibility that other bivalve species could retain this compound more strongly, suggest that this kind of intoxication might pose a significant risk in Angola. © 2009 Elsevier Ltd. All rights reserved. Source

An annotated catalogue of the species and subspecies of tiger beetles (Coleoptera: Carabidae, Cicindelinae) hitherto known from Angola is given. A total of 89 forms (74 species and 15 subspecies) is recorded from this southwestern country of Africa. Within this assemblage there are 31 endemic forms (33.3%). Some species are represented by only the holotype specimen (some without locality) or the type series. Others were recorded based on a single specimen. Records for six species previously unknow from Angola are given: Foveodromica sp. n. 1, Foveodromica sp. n. 2, Ophryodera rufo-marginata bradshawi Péringuey, 1888, Elliptica muata parallelestriata (W. Horn, 1923), Lophyra differens (W. Horn, 1892) and Myriochila jucunda (Péringuey, 1892). A historical review, as well as some considerations on the distribution and conservation status of these beetles in Angola are also presented. Copyright © 2013 Magnolia Press. Source

Pinto F.J.,Agostinho Neto University
Advances in Intelligent Systems and Computing | Year: 2016

This work describes the structure and the operation of a basic genetic algorithm. The studies show that the genetics algorithms (GAs) always offer an answer that tends to be the best over time, satisfied with knowledge on the problem, we can improve the function of evaluation that was always search of inside the current population those solutions that possess the best characteristic and tries to combine them of form to generate solutions still better and the process is repeated until we have obtained a solution for our problem. The (GA) go in the scene to resolve those problems whose exact algorithms are extremely slow or unable to obtain a solution. © Springer International Publishing Switzerland 2016. Source

Discover hidden collaborations