O Programa Nova EJA do Estado do Rio de Janeiro na perspectiva dos seus sujeitos

O presente estudo propõe analisar a nova matriz curricular da Educação de Jovens e Adultos do Estado do Rio de Janeiro, que foi aprovada pelo CEE/RJ através da Deliberação CEE N 320/2011. Tal programa derivou das novas diretrizes curriculares apresentadas pelo Plano de Metas do Estado do Rio de Janeiro (PME/RJ- 2011), atribuído como uma das frentes de atuação governamental adotadas pelo Governo Sergio Cabral. Nesse sentido, propomos pesquisar as implicações formativas na formação de Jovens e Adultos decorrentes da implantação do currículo mínimo na EJA, tendo como arcabouço teórico metodológico a Filosofia da Práxis de Gramsci, norteado pela concepção de Escola e educação que deriva de seu pensamento. Para tal, busca-se a partir de uma práxis filosófica que se revela comprometida com a realidade, contribuir com estudos que possam oferecer uma perspectiva de análise à sociedade. Para Gramsci, é no campo das experiências concretas, na análise crítica sobre a cultura e a política que se chegará, progressivamente, a uma concepção singular de mundo atrelada a visão da totalidade que vincula política e história como elementos indissociáveis no processo de emancipação das classes subalternas. Daí o interesse em investigar nos espaços de tensão, os embates históricos dos modelos de formação do Estado em confronto com as demandas da educação popular, através das ações históricas coletivas, que evidenciam como principais protagonistas os movimentos sociais.

Investigating carbon materials for use as the electron emission source in a parallel electron-beam lithography system

A microelectronic parallel electron-beam lithography system using an array of field emitting microguns is currently being developed. This paper investigates the suitability of various carbon based materials for the electron source in this device, namely tetrahedrally bonded amorphous carbon (ta-C), nanoclustered carbon and carbon nanotubes. Ta-C was most easily integrated into a gated field emitter structure and various methods, such as plasma and heavy ion irradiation, were used to induce emission sites in the ta-C. However, the creation of such emission sites at desired locations appeared to be difficult/random in nature and thus the material was unsuitable for this application. In contrast, nanoclustered carbon material readily field emits with a high site density but the by-products from the deposition process create integration issues when using the material in a microelectronic gated structure. Carbon nanotubes are currently the most promising candidate for use as the emission source. We have developed a high yield and clean (amorphous carbon by-product free) PECVD process to deposit single free standing nanotubes at desired locations with exceptional uniformity in terms of nanotube height and diameter. Field emission from an array of nanotubes was also obtained. © 2001 Elsevier Science B.V.

Reproductive potential of Yellowfin Tuna (Thunnus albacares) in the western Indian Ocean

The reproductive biology of Yellowfin Tuna (Thunnus albacares) in the western Indian Ocean was investigated from samples collected in 2009 and 2010. In our study, 1012 female Yellowfin Tuna were sampled: 320 fish on board a purse seiner and 692 fish at a Seychelles cannery. We assessed the main biological parameters that describe reproductive potential: maturity, spawning seasonality, fish condition, and fecundity. The length at which 50% of the female Yellowfin Tuna population matures (L50) was estimated at 75 cm in fork length (FL) when the maturity threshold was established at the cortical alveolar stage of oocyte development. To enable comparison with previous studies, L50 also was estimated with maturity set at the vitellogenic stage of oocyte development; this assessment resulted in a higher value of L50 at 102 cm FL. The main spawning season, during which asynchrony in reproductive timing among sizes was observed, was November–February and a second peak occurred in June. Smaller females (<100 cm FL) had shorter spawning periods (December to February) than those (November to February and June) of large individuals, and signs of skip-spawning periods were observed among small females. The Yellowfin Tuna followed a “capital-income” breeder strategy during ovarian development, by mobilizing accumulated energy while using incoming energy from feeding. The mean batch fecundity for females 79–147 cm FL was estimated at 3.1 million oocytes, and the mean relative batch fecundity was 74.4 oocytes per gram of gonad-free weight. Our results, obtained with techniques defined more precisely than techniques used in previous studies in this region, provide an improved understanding of the reproductive cycle of Yellowfin Tuna in the western Indian Ocean.