LAND USE/ COVER (LULC) MAPPING IN BRAZILIAN CERRADO USING NEURAL NETWORK WITH SENTINEL-2 DATA

The Sentinel-2a and 2B satellites form a multispectral imaging mission for Earth observation. They have promising characteristics for the study of soils and vegetation cover, and their data can be applied for land use/cover (LULC) mapping. To this end, neural networks have shown good results in pattern recognition tasks in orbital images. In this sense, the study aimed to evaluate the use of Sentinel 2 (ESA) image for LULC mapping in the Cerrado Biome, through the application of artificial neural network methodology. Among the classes of use and occupation examined, 8 classes were selected, 4 of which were natural (water bodies, savanna, forest and field formation) and 4 anthropic (Pasture, Urban areas, Silviculture and Seasonal Crop). The classification system by artificial neural network (ANN) was considered successful, with thematic accuracy (Kappa coefficient) of 0.77. Although there are still some thematic confusions during the classification process, the classification results were considered superior when compared to the MaxVer classifier. The Sentinel-2 image, together with the use of a neural network, was shown a good input for carrying out this type of mapping.Key words: Orbital Remote Sensing System, Supervised Classification Techniques, LULC classes

Community regeneration for alternatives (I) = 另闢蹊徑重建社區 (I)

Speakers : INYAKU Tomoya (Save Seeds, Japan) Claudia Yadira CABALLERO BORJA (Barter Community Mixiuhca and Ecomun Network, Mexico) Hernan VARGAS (ALBA, Venezuela) Janailson ALMEIDA (MST, Brazil) Marco FERNANDES (MST, Brazil) Discussants : Walter MIGNOLO (Duke University, USA) John RESTAKIS (Community Evolution Foundation, Canada) Chantana WUN’GAEO (Chulalongkorn University, Thailand) Andrew AERIA (ALIRAN, Malaysia) Samuel LEE (Korea Dialogue Academy, South Korea

Obtenção de corante do repolho roxo, Brassica oleracea, por dois métodos de extração

Cabbage is avegetable crop with great versatility, not limited to its nutritional value. Besides coloring the mixture, it stands out for its high quantity of anthocyanin and phenolic compounds, which contribute to prevention of cardiovascular diseases and some types of cancer. Anthocyanins are widely found in nature and are responsible for the majority of blue, violet and red present in flowers and fruits. Thus, its main utilization is in industries as a natural dye. This study aims to obtain a colorant, anthocyanin, the red cabbage (Brassica oleracea) by two different extraction methods. In the present study, the cabbage extract was obtained through alcoholic and aqueous procedure. The pigment characteristics evaluated were: pH, total titratable acidity, soluble solid content (°Brix), humidity, ashes, proteins, extraction and quantification of total anthocyanins, vitamin C. The result found for anthocyanin in red cabbage in natura was 6.58 mg/100g. The results found for the extraction through alcoholic method and through aqueous method were 4.58 mg/100g and 5.33 mg/100g, respectively. It was observed that the extraction through aqueous procedure had a better efficiency, corresponding to 50% of the initial volume, while alcoholic procedure was 30% of the initial volume.O repolho é uma hortaliça folhosa, com grande versatilidade, não somente pelo seu valor nutritivo. Além de colorir a mistura, destaca-se pelo elevado teor de antocianinas e compostos fenólicos, contribuindo para a prevenção de doenças cardiovasculares, bem como de alguns tipos de câncer. As antocianinas são largamente encontradas na natureza e responsáveis pela maioria das colorações azuis, violeta e vermelhas de flores e frutos, sendo sua principal utilização como corante natural na indústria. O presente trabalho tem como objetivo a obtenção de um corante, antocianina, de repolho roxo (Brassica oleracea) por dois métodos distintos de extração. No corrente estudo, o extrato foi obtido por meio de procedimento alcoólico e aquoso. As características avaliadas foram: pH; acidez total titulável; Teor de sólidos solúveis (°Brix); umidade; cinzas; proteínas; extração e quantificação de antocianinas totais; Vitamina C. O resultado encontrado para antocianina no repolho roxo in natura foi de 6,58 mg/100g, para o extrato por método alcoólico foi de 4,58 mg/100g e 5,33 mg/100g para o extrato aquoso. Observou-se que a extração pelo método aquoso teve um rendimento melhor, correspondente a 50% do seu valor inicial, a extração alcoólica foi de 30% do seu volume inicial