Princípios da Agroecologia

Agricultura sustentável tem que considerar aspectos socioeconômicos e culturais dos grupos sociais implicados. Não basta proteger e melhorar o solo ou a produtividade agrícola se não resulta em melhorias nas condições de vida das pessoas envolvidas. Portanto, agricultura sustentável é um conceito que implica aspectos políticos e ideológicos que tem a ver com o conceito de cidadania e libertação dos esquemas de dominação impostos por setores de nossa própria sociedade e por interesses econômicos de grandes grupos, de modo que não se pode abordar o tema reduzindo outra vez as questões técnicas.

Francisco Roberto Caporal


"Muita gente pequena, em muitos lugares pequenos, fazendo coisas pequenas, mudarão a face da Terra". provérbio africano

Como os lobos mudam rios

Como se processa os animais que comemos

Rio Banabuiu


sexta-feira, 6 de fevereiro de 2015

Indios e Midia Digital

Indigenous Engagement with Digital and Electronic Media: InDigital Conference at Vanderbilt University, March 26-28

A cartoon by Gary Larson from 1984 shows natives in grass skirts rushing to hide TV, VCR and telephone before the anthropologists arrive. As these devices have become smaller, cheaper, and more widely available, the penetration of electronic media into indigenous cultures has only grown.

Native peoples of the Amazon and elsewhere in Latin America have become engaged consumers of electronic media, while also making use of video cameras, cell phones and laptops to create and transmit their own artistic and cultural productions and political views. The results can be complex and surprising, ranging from videos about traditional ceremonies to catchy electronic music and even a native-language cover of the Beatles. Among the works made by Kayapó film makers I trained as part of an indigenous media project at the Goeldi Museum in Brazil are films documenting tug-of-war at an interethnic sports competition; a professional soccer game in Rio de Janeiro; the “Miss Kayapó” beauty contest at a local fairground; and a concert by the indigenous pop star Bepdjyre, who composes his own lyrics in Kayapó but sets them to popular Brazilian dance rhythms.

Bepdjyre's stage show includes Kayapó girls showing off sensual dance movesgleaned from watching TV and DVDs.

This conference, sponsored by Vanderbilt and Middle Tennessee University, brings together anthropologists, media scholars and indigenous filmmakers to reflect on the appropriations and interpretations of digital media by indigenous peoples, and to discuss the transformations this use of technology is bringing about.

The "Miss Kayapó" beauty contest captured by film maker Tatajere.

Faye Ginsberg of the Center for Media, Culture and History at New York University will give the keynote address at the event. Indigenous filmmaker Takumã Kuikuru and Brazilian anthropologist Carlos Fausto present their documentary “The Hyper-Women,” which follows a village on the Upper Xingu River as it strives to rescue, rehearse and host a traditional song festival before the last woman who knows the repertoire dies. The film has won several international awards including the Jury Prize at Brazil’s prestigious Gramado Festival, Best Film at the Curitiba International Film Festival and Best Documentary at the Hollywood Brazilian Film Festival. Kayapó film makers Bepunu and Krakrax will show works produced on their own village-based laptop editing suites as part of the Goeldi Museum media project, and Richard Pace of Middle Tennessee University will present results of a study financed by the National Science Foundation on the uses and impacts of satellite TV, DVD players and cell phones in a Kayapó village.
Conference registration is open through February 16. For more information, visit

Updated from the original posting by The New York Review of Books.


Protec-An-Acre - Rainforet Action Network


Since 1993, RAN’s Protect-an-Acre program (PAA) has distributed more than one million dollars in grants to more than 150 frontline communities, Indigenous-led organizations, and allies, helping their efforts to secure protection for millions of acres of traditional territory in forests around the world.
Indonesia's Friends of the National Parks Foundation staff teach community members how to plant trees on the edge of Tanjung Puting National Park on Borneo. Photo credit: FNPF
Rainforest Action Network believes that Indigenous peoples are the best stewards of the world’s rainforests and that frontline communities organizing against the extraction and burning of dirty fossil fuels deserve the strongest support we can offer. RAN established the Protect-an-Acre program to protect the world’s forests and the rights of their inhabitants by providing financial aid to traditionally under-funded organizations and communities in forest regions.
Indigenous and frontline communities suffer disproportionate impacts to their health, livelihood and culture from extractive industry mega-projects and the effects of global climate change. That’s why Protect-an-Acre provides small grants to community-based organizations, Indigenous federations and small NGOs that are fighting to protect millions of acres of forest and keep millions of tons of CO2 in the ground.
Our grants support organizations and communities that are working to regain control of and sustainably manage their traditional territories through land title initiatives, community education, development of sustainable economic alternatives, and grassroots resistance to destructive industrial activities.
Indonesia's Friends of the National Parks Foundation staff educate children about interacting with wildlife around Tanjung Puting National Park on Borneo. Photo credit: FNPF
PAA is an alternative to “buy-an-acre” programs that seek to provide rainforest protection by buying tracts of land, but which often fail to address the needs or rights of local Indigenous peoples. Uninhabited forest areas often go unprotected, even if purchased through a buy-an-acre program. It is not uncommon for loggers, oil and gas companies, cattle ranchers, and miners to illegally extract resources from so-called “protected” areas.
Traditional forest communities are often the best stewards of the land because their way of life depends upon the health of their environment. A number of recent studies <-Needs link add to the growing body of evidence that Indigenous peoples are better protectors of their forests than governments or industry.
Based on the success of Protect-an-Acre, RAN launched The Climate Action Fund (CAF) in 2009 as a way to direct further resources and support to frontline communities and Indigenous peoples challenging the fossil fuel industry.
Additionally, RAN has been a Global Advisor to Global Greengrants Fund (GGF) since 1995, identifying recipients for small grants to mobilize resources for global environmental sustainability and social justice using the same priority and criteria as we use for PAA and CAF.
Through these three programs each year we support grassroots projects that result in at least:
  • 10,000 acres of forest, held in customary ownership by Indigenous groups, is entered into the process of securing official land title recognition, providing communities with legal grounds to protect their traditional territories.
  • 10,000 trees planted, often as buffer zones around protected areas and/or as part of income and resource-generating permaculture projects that help stop land degradation.

Entrelaçamento quântico é finalmente posto dentro de um chip

Redação do Site Inovação Tecnológica - 05/02/2015
Entrelaçamento quântico é finalmente posto dentro de um chip
Os fótons oriundos de um laser ficam girando em torno do anel, sendo reemitidos aos pares, com um elevado percentual dos pares já saindo entrelaçados. [Imagem: Università degli Studi di Pavia]
Entrelaçamento integrado
Davide Grassani e seus colegas da Universidade de Pavia, na Itália, criaram um componente capaz de gerar direta e continuamente pares de fótons entrelaçados.
Os fótons entrelaçados ficam intrinsecamente "conectados" um ao outro, e tudo o que acontece a um alterará imediatamente o outro, qualquer que seja a distância que os separe.
Este é um elemento fundamental para a criação dos computadores quânticos, e sua integração no interior de um chip de silício promete simplificar muito todo o trabalho de leitura e escrita dos qubits, os bits quânticos.
Ressonadores em anel
O componente utiliza uma tecnologia já bem conhecida, chamada microanel ressonador, utilizada em diodos ópticosredes wireless a laser,microaceleradores de partículas e em experimentos de plasmônica, entre muitas outras aplicações.
Tipicamente, esses ressonadores capturam a luz, fazendo-a ficar dando voltas, e reemitem fótons com propriedades que podem ser ajustadas pelo projeto do componente. Neste caso, os fótons oriundos de um laser ficam girando em torno do anel, sendo reemitidos aos pares, com um elevado percentual dos pares já saindo entrelaçados.
"A principal vantagem da nossa nova fonte é que ela é ao mesmo tempo pequena, brilhante e feita de silício. O diâmetro do anel ressonador é de meros 20 micrômetros. Fontes anteriores eram centenas de vezes maiores do que a que desenvolvemos," disse o professor Daniele Bajoni, coordenador da equipe.
Os geradores de fótons entrelaçados até agora eram feitos sobretudo de cristais especiais e, com vários milímetros de diâmetro, inadequados portanto para serem inseridos no interior de chips.

Micrometer-scale integrated silicon source of time-energy entangled photons
Davide Grassani, Stefano Azzini, Marco Liscidini, Matteo Galli, Michael J. Strain, Marc Sorel, J. E. Sipe, Daniele Bajoni
Vol.: 2, 1, 88-94
DOI: 10.1364/OPTICA.2.000088


Assine o Abaixo-Assinado virtual que pede o banimento dos agrotóxicos já proibidos em outros países do mundo e que circulam livremente no Brasil.

A Campanha tem o objetivo de alertar a população sobre os perigos dos agrotóxicos, pressionar governos e propor um modelo de agricultura saudável para todas e todos, baseado na agroecologia.

Assine já, pelo banimento dos banidos! Entre no link abaixo.