La percepción de camioneros sobre el uso de sustancias psicoactivas en el trabajo: un estudio etnog

Objectivos: comprender la experiencia subjetiva de camioneros con respecto al uso de sustancias psicoactivas. Método: se utilizó el método cualitativo de carácter etnográfico. Resultados: los elementos encontrados, como el alto índice de uso de sustancias, corroboran los estudios epidemiológicos sobre el tema, agregando, sin embargo, sentimientos subjetivos y testimonios. Conclusiones: existe una divergencia de opiniones que debilita la categoría en relación con la negociación para mejorar las condiciones de trabajo, mientras que el uso de sustancias ilícitas se considera normal y no se cuestiona por los sujetos.Objective: to understand the subjective experience of truck drivers regarding the use of psychoactive  substances. Method: an ethnographic approach to qualitative research was employed. Results: the discovered elements, such as high levels of substance abuse, corroborate epidemiological research about the theme including, however, subjective feelings and testimonials. Conclusions: there is a divergence of opinions that weakens the category regarding negotiation for better working conditions, while the use of illicit substances is considered normal and is unquestioned by the subjects.Objetivo: compreender a experiência subjetiva de caminhoneiros em relação ao uso de substâncias psicoativas. Método: utilizou-se método qualitativo de caráter etnográfico. Resultados: os elementos encontrados, tais como elevado índice de consumo de substâncias, corroboram estudos epidemiológicos acerca da temática, acrescentando, todavia, sentidos subjetivos e depoimentos. Conclusão: há uma divergência de opiniões que enfraquece a categoria em relação à negociação por melhores condições de trabalho, ao mesmo tempo que o uso de substâncias ilícitas é considerado normal e não é questionado por parte dos participantes

Direct evidence for phosphorus limitation on Amazon forest productivity

The productivity of rainforests growing on highly weathered tropical soils is expected to be limited by phosphorus availability1. Yet, controlled fertilization experiments have been unable to demonstrate a dominant role for phosphorus in controlling tropical forest net primary productivity. Recent syntheses have demonstrated that responses to nitrogen addition are as large as to phosphorus2, and adaptations to low phosphorus availability appear to enable net primary productivity to be maintained across major soil phosphorus gradients3. Thus, the extent to which phosphorus availability limits tropical forest productivity is highly uncertain. The majority of the Amazonia, however, is characterized by soils that are more depleted in phosphorus than those in which most tropical fertilization experiments have taken place2. Thus, we established a phosphorus, nitrogen and base cation addition experiment in an old growth Amazon rainforest, with a low soil phosphorus content that is representative of approximately 60% of the Amazon basin. Here we show that net primary productivity increased exclusively with phosphorus addition. After 2 years, strong responses were observed in fine root (+29%) and canopy productivity (+19%), but not stem growth. The direct evidence of phosphorus limitation of net primary productivity suggests that phosphorus availability may restrict Amazon forest responses to CO2 fertilization4, with major implications for future carbon sequestration and forest resilience to climate change

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

Sleep habits in native brazilian bororo children

Sleep behavior patterns in childhood are influenced by familial, cultural and environmental factors. In understanding sleep in Native Brazilian Bororo children, one should consider the influence of their culture on the child's sleep. This research analyzes sleep habits of Native Bororo children from the Meruri village, located in an Indian Reservation in the state of Mato Grosso. Fourty four children ( 24 M; 20 F) were evaluated; ages ranged from one month to 10 years, with a mean age of 4.9 years. Sleep characteristics were assessed by means of a standard questionnaire applied to the mothers. Cosleeping - sleeping together with family members - was a remarkable finding, in every child 0-2 year old and in 81.5% in the 2-10 years group. The second characteristic was sleeping with many people in the same room. There was an average of 5.1 people per room in the younger group and 3.9 people in the older grou

MENTORIA DA LÍNGUA BRASILEIRA DE SINAIS NA EDUCAÇÃO MÉDICA

O presente texto pretende esclarecer a relação da Mentoria de Libras na educação médica e explica que existe uma linha tênue entre o sistema de ensino-aprendizagem de Libras no Brasil e a formação médica. Em vista disto, a Mentoria de Libras corrige o sistema pedagógico de aprendizado tradicional acerca de uma Língua espaço-visual, que requer mais que a carga horária oferecida atualmente e aulas conteudistas sobre vocabulário e gramática