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Search Results: 1 - 10 of 8169 matches for " Anastácio;Tosta "
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Cross-sectional study defines difference in malaria morbidity in two Yanomami communities on Amazonian boundary between Brazil and Venezuela
Marcano, Teodardo José;Morgado, Anastácio;Tosta, Carlos Eduardo;Coura, José Rodrigues;
Memórias do Instituto Oswaldo Cruz , 2004, DOI: 10.1590/S0074-02762004000400005
Abstract: it is well established that immunity to malaria is short-lived and is maintained by the continuous contact with the parasite. we now show that the stable transmission of malaria in yanomami amerindian communities maintains a degree of immunity in the exposed population capable to reduce prevalence and morbidity of malaria. we examined 508 yanomami amerindians living along orinoco (407) and mucajaí (101) rivers, on the venezuelan and brazilian amazon region, respectively. at orinoco villages, malaria was hyperendemic and presented stable transmission, while at mucajaí villages it was mesoendemic and showed unstable transmission. the frequency of plasmodium vivax and p. falciparum was roughly comparable in venezuelan and brazilian communities. malaria presented different profiles at orinoco and mucajaí villages. in the former communities, malaria showed a lower prevalence (16% x 40.6%), particularly among those over 10 years old (5.2% x 34.8%), a higher frequency of asymptomatic cases (38.5% x 4.9%), and a lower frequency of cases of severe malaria (9.2% x 36.5%). orinoco villagers also showed a higher reactivity of the immune system, measured by the frequency of splenomegaly (72.4% x 29.7%) and by the splenic index (71.4% over level 1 x 28.6), and higher prevalence (91.1% x 72.1%) and mean titer (1243 x 62) of antiplasmodial igg antibodies, as well as a higher prevalence (77.4% x 24.7%) and mean titer (120 x 35) of antiplasmodial igm antibodies. our findings show that in isolated yanomami communities the stability of malaria transmission, and the consequent continuous activation of the immune system of the exposed population, leads to the reduction of malaria prevalence and morbidity.
A Piece of a Puzzle of Haplotypes for the Indian Ocean Hawksbill Turtle  [PDF]
Rita Anastácio, Mário Jorge Pereira
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.88034
Abstract: The Indian Ocean basin has much to reveal in what concerns marine turtles. Its regional management units (RMUs) are still lacking molecular data to define conservation strategies and priorities. Vamizi Island is one of the best known rookeries in the north of the Mozambique Channel. A mitochondrial DNA analysis revealed 14 haplotypes for the hawksbill turtle’s nesting and foraging in/near Vamizi, twelve of which were new in 2011. Though more studies inside the Channel are needed, Vamizi Island possibly contributes with hatchlings for other locations. More knowledge is important to define priorities for management units inside the Indian Ocean.
From the Challenges Imposed by Climate Change to the Preservation of Ecosystem Processes and Services  [PDF]
Rita Anastácio, Mário Jorge Pereira
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.812048
Today, especially in countries that offer a satisfactory quality of life, it is easy to forget that we depend directly and indirectly on services provided by ecosystems such as quantity and quality of water, energy, food, health, and shelter. In less developed countries, the daily struggle for essential goods makes this dependency more real, despite the lack of knowledge, organization and/or financial resources to deal with the problems imposed on ecosystems by climate and anthropogenic changes. Protecting ecosystems by ensuring the services they provide has become highly dependent on our management capacity, our understanding of its functioning, and our capacity for persuasion. Demographic pressure and individualism compromise the survival of various species, including our own, and create pressures under governments and the stability of nations. The notion of facing a global challenge has awakened in the scientific community the need to focus on developing global strategies that change the mind-sets of decision makers, industry, governments and markets. Global knowledge networks and experts are being built to mitigate problems on a global scale. In this mini review, the authors make a brief visit to documents, intergovernmental initiatives, and platforms that have been built with the aim of contributing to promote a resolution for the global problems.
Epidemia de suicídio entre os Guaraní-Kaiwá: indagando suas causas e avan?ando a hipótese do recuo impossível
Morgado, Anastácio F.;
Cadernos de Saúde Pública , 1991, DOI: 10.1590/S0102-311X1991000400009
Abstract: the suicide of six young guaraní-kaiwá indians within the timespan of two weeks is enough to fulfill any criteria to define an epidemic. in a total population of 7,500 individuals, the available data account for 52 cases of suicide between 1987 and august 1991. the epidemic is more dramatic among the kaiwá subgroup among which 14 individuals died in 1990 and a number of suicides were reported for the first semester of 1991. for both sexes, most deaths were observed in the age group 12-20 years. the author advances the hypothesis of the impossible return according to which, under extreme pressure exerted by western society, they see no possibility of returning to their traditional way of living. under circumstances of extreme self-devaluation, suicide becomes the last alternative for the survival of their culture. suicide epidemics have been reported among amerindians in other countries suffering from the same kind of pressure. in brazil and also in other countries, other tribes have been urbanized and yet did not experience the tragedy which the kaiwá are going through because they had some kind of acceptable insertion in the national society.
Spy out to Protect: Sensing Devices for Wildlife Virtual Fencing  [PDF]
Rita Anastácio, Sérgio Cardoso, Mário Jorge Pereira
Open Journal of Ecology (OJE) , 2018, DOI: 10.4236/oje.2018.83013
Abstract: To avoid wildlife-human conflict several solutions are used, like electrical fences, the most expensive solution. Nowadays, technology enables alternative and cheaper approaches for conservation projects. A technological device was developed to detect elephants, moving on their habitat, and predict and react by avoiding confrontation with man. The devices were tested in field experiments, and proved to be efficient in capturing floor vibration, and air-sound signals. Collected data also enabled the estimation of the vibration-source by calculus (using triangulation), revealing the importance of the methodology for real-time location and tracking of high mass animals (e.g. elephants). Building up a mesh of devices, separated 25 m from each other, is estimated as possible to monitor and identify different animals (by discriminating patterns) in an area, like a virtual fencing system. Though the devices may be effective for animal behaviour research, or even animal communication analysis, or other Biology field, other applications outside Biology are possible for them, like monitoring of: rock-falling, micro seismic railway, infrastructures, and people movements.
Fatores culturais associados à doen?a da reclus?o do alto Xingu (Brasil Central)
Verani, Cibele;Morgado, Anastácio;
Cadernos de Saúde Pública , 1991, DOI: 10.1590/S0102-311X1991000400005
Abstract: this article presents an anthropological approach to the symbolic aspects of the disease, considering traditional representations about the puberty seclusion syndrome which affects adolescent indians from the upper xingu region (central brazil), in a comparative perspective with the clinical-epidemiological approach. the traditional nosological category and its etiological implications in indigenous medicine and culture are contrasted with the western medical category - a peripheral neuropathy, possibly of toxic origin - identified in some cases of the syndrome. an epidemiological analysis of the data collected from the traditional point of view shows relations with events of cultural origin, associated with social and political contexts and with the nature of cross-cultural relations. moreover, this culture-bound syndrome presents some methological issues for western medicine, particularly for biomedical and social-epidemiological approaches. finally, the authors make explicit some cultural assumptions characteristic of modern western society, underlying the procedures used by the scientific disciplines involved.
Evolu o tecnológica em sistema de informa o
Antonio Anastácio da Cruz
ETD : Educa??o Temática Digital , 2003,
Eretmochelys imbricata: Lessons to Learn from a Monitoring Program in the North of Mozambique  [PDF]
Rita Anastácio, Cardoso Lopes, Jorge Ferr?o, Mário Jorge Pereira
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.85024
Abstract: Monitoring programs for nesting turtles around the world have been important to build up a matrix of information for better comprehension of their behaviour and dispersion. The Western Indian Ocean has several monitoring programs that are being used to reveal migration routes, phylogenetic interconnections and nesting behaviour patterns. We determined the nesting parameters for 69 records of hawksbill turtles collected during the Vamizi Island monitoring program. We also determined carapace measurements parameters of the turtles caught by fishermen in the area and give some considerations to improve the conservation of this species. Results show that the island receives hawksbill females all year long. Vamizi is a small nesting ground for this species, with an incubation period of 60.9 ± 10.6 days and a high reproductive rate. The turtles’ carapace measurements (SCL 42.0 ± SD 9.0 cm) revealed the existence of young individuals, foraging near the island, and their vulnerability to the fishing practices. This study strongly defends the need to identify more developmental and nesting spots, to be protected near Vamizi, to establish a solid network of marine reserves and corridors in the north of the Mozambique Channel.
Global Science Teaching for Human Well-Being  [PDF]
Rita Anastácio, Ulisses M. M. Azeiteiro, Mário Jorge Pereira
Creative Education (CE) , 2017, DOI: 10.4236/ce.2017.814156
Abstract: A curriculum framework for seven years of science education is delivered as a proposal for discussion, for the nine years of schooling that the Incheon Declaration defines as compulsory (UNESCO, 2015). Every child should learn Science in their mother tongue, hence at least one global science curriculum should be provided for free, translated for free, and posted in a public site. The materials derived from the same curriculum should be provided with the same perspective: translated into the child’s mother tongue, easily available and free. These derived materials should address as well the traditional/local knowledge, respecting indigenous cultures. We strongly believe that, to achieve the 2030 goals for education, a massive global act of passion altruism that puts each teacher and pedagogue’s creativity at the service of global science teaching. For other subjects, the feeling and convictions are the same. But, because we all depend on ecosystems that sustain us, to deliver that message using a science curriculum is an obligation. Sharing a global science curriculum open to change and debate that conjugates Biology, Geology, Physics, and Chemistry, while having in consideration the sustainable development goals, is the aim of this manuscript.
A natureza dos números na República de Plat?o
Araújo Jr., Anastácio Borges de;
Kriterion: Revista de Filosofia , 2010, DOI: 10.1590/S0100-512X2010000200008
Abstract: the presence of the mathematics in plato's dialogues is unquestionable. however, its reach and sense is controversial for some specialists. some believe that the mathematical themes employed in the dialogues are mathematical fantasies; on the other hand, others defend, based on the aristotle's testimonies, that plato would have substituted the intelligible forms by the ideal numbers in his hypothesis. having not taken part in the quarrel, we propose an investigation on the nature of the numbers based exclusively in plato's texts, particularly oriented by the a passage in book vii of republic (525 b11 - c3), in which socrates says: "then it would be fitting, glaucon, to set this study down in law and persuade those who are going to participate in the greatest things in the city to go to calculation and to take it up, not after the fashion of private men, but stay with it until they come to the contemplation of nature of numbers with intellection itself (...)".
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