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Sample records for utlizando imagens landsat

  1. Uma biblioteca de pontos de controle para imagens MSS Landsat

    OpenAIRE

    Fernando Augusto Mitsuo Ii

    1985-01-01

    O objetivo deste trabalho e desenvolver um sistema para criacao, manutencao e gerenciamento de uma biblioteca de pontos de controle para imagens MSS Landsat. Um ponto de controle e uma caracteristica fisicamente detectavel numa cena, cuja localizacao geodesica e precisamente conhecida. O uso destes pontos e de fundamental importancia num sistema de correcao geometrica de imagens de satelite. A biblioteca permitira que pontos de controle pertencentes a uma dada cena sejam recuperados de uma ma...

  2. Análise comparativa de classificadores digitais em imagens do Landsat-8 aplicados ao mapeamento temático

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    Danilo Francisco Trovo Garofalo

    2015-07-01

    Full Text Available Resumo: O objetivo deste trabalho foi avaliar o desempenho dos classificadores digitais SVM e K-NN para a classificação orientada a objeto em imagens Landsat-8, aplicados ao mapeamento de uso e cobertura do solo da Alta Bacia do Rio Piracicaba-Jaguari, MG. A etapa de pré-processamento contou com a conversão radiométrica e a minimização dos efeitos atmosféricos. Em seguida, foi feita a fusão das bandas multiespectrais (30 m com a banda pancromática (15 m. Com base em composições RGB e inspeções de campo, definiram-se 15 classes de uso e cobertura do solo. Para a segmentação de bordas, aplicaram-se os limiares 10 e 60 para as configurações de segmentação e união no aplicativo ENVI. A classificação foi feita usando SVM e K-NN. Ambos os classificadores apresentaram elevados valores de índice Kappa (k: 0,92 para SVM e 0,86 para K-NN, significativamente diferentes entre si a 95% de probabilidade. Uma significativa melhoria foi observada para SVM, na classificação correta de diferentes tipologias florestais. A classificação orientada a objetos é amplamente aplicada em imagens de alta resolução espacial; no entanto, os resultados obtidos no presente trabalho mostram a robustez do método também para imagens de média resolução espacial.

  3. Refinamento de imagens termais do Landsat 5 - TM com base em classes de NDVI Sharpening of thermal Landsat 5 - TM imagery data based on NDVI classification

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    Argemiro Lucena de Araújo

    2012-12-01

    Full Text Available O objetivo desse estudo foi avaliar um método simplificado, baseado em classes de NDVI para refinamento das imagens de temperatura da superfície (Ts, obtidas pelo sensor TM do Landsat 5 referentes aos anos de 2005 e 2006. Para tanto, foram propostos e comparados três modelos de refinamento baseados no método de regressão linear. Os erros percentuais e erros médios quadráticos obtidos com a utilização dos modelos avaliados foram, respectivamente, da ordem de 0,37% e 1,38 ºC, enquanto o modelo original apresentou erro médio quadrático da ordem de 1,32 ºC. Foram constatados que os erros obtidos com as calibrações realizadas não influenciaram significativamente nos valores médios das imagens termais, e que os resultados contribuíram substancialmente para a melhoria da resolução espacial das mesmas. O refinamento permitiu ainda a identificação precisa de alvos da superfície e a identificação de feições não detectáveis na resolução original. Isto evidencia que o método simplificado sugerido neste estudo, permite um refinamento preciso com uma forma de obtenção mais simples em relação ao modelo original.The objective of this study was to use a simplified method based on NDVI classes for the sharpening of the Landsat 5 - TM surface temperature images (Ts obtained during the years of 2005 and 2006. Thus, three sharpening models, based on the linear regression method, were proposed and compared. The relative and the root mean square errors obtained through the suggested models were of 0.37% and 1.38 ºC, respectively, while the original model presented root mean square error of 1.32 ºC. It was verified that the errors obtained with the accomplished calibrations did not significantly influence in the average values of the thermal images and the results contributed substantially to the improvement of their spatial resolution. The sharpening allowed the precise identification of the targets and features undetectable at

  4. Albedo à superfície a partir de imagens Landsat 5 em áreas de cana-de-açúcar e cerrado Surface albedo from Landsat 5 images in areas of sugar cane and cerrado

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    Pedro R. Giongo

    2010-03-01

    Full Text Available Propôs-se, neste trabalho, estimar dados de albedo à superfície terrestre usando-se o sensor Thematic Mapper (TM do satélite LANDSAT 5 e compará-lo com dados de duas estações agrometeorológicas localizadas em região de Cerrado e a outra em cultivo da cana-de-açúcar. A região de estudo está localizada no município de Santa Rita do Passa Quatro, SP, Brasil. Para a realização do estudo obtiveram-se seis imagens orbitais do satélite Landsat 5 sensores TM, na órbita 220 e ponto 75, nas datas de 22/02, 11/04, 29/05, 01/08, 17/08 e 21/11, todas do ano de 2005, a que correspondem os dias juliano de 53, 101, 149, 213, 229 e 325, respectivamente. As correções geométricas para as imagens foram realizadas e geradas as cartas de albedo. O algoritmo SEBAL estimou satisfatoriamente os valores de albedo de superfícies sobre áreas de cerrado e de cana-de-açúcar, na região de Santa Rita do Passa Quatro, SP, consistentes com observações realizadas do albedo à superfície.This study aimed to estimate albedo data from the land surface sensor using the images of Thematic Mapper (TM satellite LANDSAT 5 and to compare it with data from two agrometeorological stations located in the region of Cerrado, and another in sugar cane cultivation. The study area is located in the municipality of Santa Rita do Passa Quatro - SP, Brazil. To carry out the study six orbital images were obtained from the satellite Landsat 5 TM sensors in the orbit 220 and in the section 75, for the dates of 22/02, 11/04, 29/05, 01/08, 17/08 and 21/11 (all in the year of 2005 which correspond to the days 53, 101, 149, 213, 229 and 325, respectively. The geometric correction for images was performed and the letters of albedo were generated. The algorithm SEBAL estimated, satisfactorily, the values of albedo on the surface areas of Cerrado and sugar cane in the region of Santa Rita do Passa Quatro - SP, consistent with observations made of the surface albedo.

  5. Utilização das imagens MSS do Landsat-1 (ERTS do mapeamento do uso atual da terra

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    Irani Schonhofen Garcia

    2014-05-01

    Full Text Available Objetiva inferir o grau de acuidade oferecida pela imagem do LANDSAT-1 para a área de estudo (região de Dourados, estado do Mato Grosso, identificando os parâmetros de drenagem, rede viárias e vegetação.

  6. Estimativa do balanço de energia utilizando imagens TM - Landsat 5 e o algoritmo SEBAL no litoral sul de Pernambuco

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    Célia Cristina Machado

    2014-03-01

    Full Text Available As trocas de energia na interface solo-planta-atmosfera, por meio das componentes do balanço de radiação (Rn e dos fluxos de calor no solo (G, sensível (H e latente (LE, são essenciais para a modelagem climática e hidrológica que, por sua vez, afetam toda a biosfera. Dessa forma, esta pesquisa teve por objetivos: (1 estimar e comparar o comportamento dos componentes do balanço de energia, usando o algoritmo SEBAL - Surface Energy Balance Algorithm for Land, em diferentes tipos de uso e cobertura do solo e (2 validar o algoritmo. Para isso, foram usadas três imagens TM - Landsat 5 de órbita e ponto 214/066, com datas de passagem em 26 de agosto de 2006, 6 de setembro de 2010 e 28 de janeiro de 2011, todas recortadas para enquadrar o litoral sul de Pernambuco. Os resultados mostraram a capacidade do SEBAL de estimar a variabilidade espacial dos diferentes componentes do balanço de energia, com capacidade de distinguir diferentes ocupações do solo. O cômputo do balanço de energia possibilita observar as formas diferenciadas do uso da energia pelos diferentes tipos de cobertura do solo e verificar aqueles que propiciam melhor conforto térmico. As estimativas da evapotranspiração obtidas pelo algoritmo SEBAL apresentaram uma boa concordância com os resultados obtidos pelo método da FAO-Penman-Monteith demonstrando, dessa forma, a potencialidade da abordagem metodológica escolhida.

  7. Estimativa da evapotranspiração real diária utilizando-se imagens digitais TM - Landsat 5 Assessment of daily actual evapotranspiration using TM - Landsat 5 digital images

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    Bergson G. Bezerra

    2008-09-01

    Full Text Available A quantificação da evapotranspiração é de grande importância na modelagem hidrológica e meteorológica, sendo indispensável no manejo hídrico sustentável de cultivos irrigados. Neste sentido, o presente trabalho tem por objetivo estimar a evapotranspiração real diária - ETr, em escalas local e regional, através de imagens TM - Landsat 5 e dados complementares coletados em estação meteorológica, através da aplicação do SEBAL - Surface Energy Balance Algorithm for Land. A área estudada fica localizada no Cariri cearense, sendo composta por áreas irrigadas, vegetação nativa e parte da floresta da Chapada do Araripe. Foram utilizadas quatro imagens, obtidas em 29 de setembro, 15 e 31 de outubro e 16 de novembro de 2005. A ETr diária foi estimada a partir da densidade de fluxo de calor latente (LE, obtida como resíduo da equação do balanço de energia. O SEBAL é constituído de várias etapas, que incluem calibração radiométrica, cômputo da reflectância e albedo, índices de vegetação e emissividade, baseados nas bandas reflectivas de sensores orbitais, e neste caso o TM - Landsat 5, além da temperatura da superfície (banda termal. Os resultados obtidos foram validados com medições da ETr obtidas em dois campos irrigados com mamona (Ricinus communis L. e algodão (Gossypium hirsutum. A ETr diária média da área estudada apresentou valores de 3,8, 3,7, 4,6 e 3,4 mm.dia-1, para os dias 272, 288, 304 e 320, respectivamente. Quando comparados com medidas efetuadas nos campos irrigados de algodão e mamona os valores da ETr estimados pelo SEBAL apresentaram diferenças inferiores a 1,0 mm dia-1, evidenciando a sua importância e acurácia.Quantification of evapotranspiration is of great importance for hydrological and meteorological modeling and indispensable for water management of irrigated crops. In this sense the main objective of this study was the estimation of actual daily evapotranspiration (Etr, in local

  8. Determinação da evapotranspiração real diária em áreas irrigadas do projeto Jaíba (Minas Gerais, Brasil, mediante imagens Landsat 5 - TM

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    Gabriel Alves Veloso

    2017-06-01

    Full Text Available O presente trabalho teve como objetivo a estimativa da evapotranspiração em áreas irrigadas do projeto Jaíba (MG e áreas circunvizinhas por meio de dados satelitários. Foram utilizadas cinco imagens do satélite Landsat 5 –TM, órbita 219 ponto 70, do ano de 2011. A estimativa da evapotranspiração real diária foi obtida através do algoritmo SEBAL (Surface Energy Balance Algorithm for Land. O SEBAL é constituído de várias etapas, que consiste na estimativa do balanço de radiação e balanço de energia e evapotranspiração. Para a obtenção desses parâmetros, utilizou-se dados da estação meteorológica localizada na cena Landsat. Foram obtidos valores médios para a evapotranspiração no período de 24 horas de 6,85 mm.dia-1, 4,0 mm.dia-1, 2,6 mm.dia-1, 2,2 mm.dia-1 e 3,4 mm.dia-1 para os dias juliano DJ 31, DJ 111, DJ 175, DJ 191 e DJ 255, respectivamente. Observou-se que a evapotranspiração apresentou variação no período analisado devido à quantidade de radiação disponível para cada dia, indicando um comportamento decíduo nas áreas de floresta estacional. A técnica utilizada demonstrou-se eficiente nas análises dos componentes estudados, sendo o SEBAL uma ferramenta importante para a gestão ambiental dos recursos hídricos.

  9. Mapeamento da antiga cobertura vegetal de várzea do Baixo Amazonas a partir de imagens históricas (1975-1981 do Sensor MSS-Landsat Mapping ancient vegetation cover of the Amazon floodplain using historical MSS/Landsat images (1975-1981

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    Vivian Fróes Renó

    2011-03-01

    Full Text Available Este estudo apresenta um mapa da cobertura vegetal da planície de inundação do Rio Amazonas entre as cidades de Parintins (AM e Almeirim (PA, com base em imagens Landsat-MSS adquiridas entre 1975 e 1981. O processamento digital dessas imagens envolveu a transformação para imagens-fração de vegetação, solo e água escura (sombra, seguido da aplicação de técnicas de segmentação e classificação por região. O mapa resultante da classificação foi organizado em quatro classes de cobertura do solo: floresta de várzea, vegetação não-florestal de várzea, solo exposto e água aberta. A precisão do mapa foi estimada a partir de dois tipos de informações coletadas em campo: 1 pontos de descrição: para validação das classes de cobertura não sujeitas a grandes alterações, como é o caso dos corpos d'água permanentes, e identificação de indicadores dos tipos de cobertura original presentes na paisagem na ocasião da obtenção das imagens (72 pontos; 2 entrevistas com moradores antigos para a recuperação da memória sobre a cobertura vegetal existente há 30 anos (44 questionários. Ao todo foram coletadas informações em 116 pontos distribuídos ao longo da área de estudo. Esses pontos foram utilizados para calcular o Índice Kappa de concordância entre os dados de campo e o mapa resultante da classificação automática, cujo valor (0,78 indica a boa qualidade do mapa de cobertura vegetal da várzea. Os resultados mostram que a região possuía uma cobertura florestal de várzea de aproximadamente 8.650 km2 no período de aquisição das imagens.This study presents a vegetation map of the Amazon River floodplain between the towns of Parintins (AM and Almeirim (PA, based on Landsat-MSS scenes from 1975 to 1981. Digital processing involved the transformation of multispectral images into fraction-images of vegetation, soil and dark water (shadow, followed by the application of segmentation and region

  10. ESTIMATIVA DO VOLUME TOTAL DE MADEIRA EM ESPÉCIES DE EUCALIPTO A PARTIR DE IMAGENS DE SATÉLITE LANDSAT

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    Elias Fernando Berra

    2012-01-01

    Full Text Available Models relating spectral answers with biophysical parameters aim estimate variables, such as wood volume, without the necessity of frequent field measurements. The objective was to develop models to estimatewood volume by Landsat 5 TM images, supported by regional forest inventory data. The image was georeferenced and converted to spectral reflectance. After, the images-index NDVI (Normalized Difference Vegetation Index and SR (Simple Ratio was generated. The reflectance values of both spectral bands (TM1, TM2, TM3 e TM4 and indices (NDVI and SR was related with the wood volume. The biggest correlation with volume was with the NDVI and SR indices. The variables selection was made by Stepwise method, which returned three regression models as significant to explain the variation in volume. Finally,the best fitted model was selected (volume = -830,95 + 46,05 × (SR + 107,47 × (TM2, which was applied on the Landsat image where the pixels had started to represent the estimated volume in m³/ha on the Eucalyptus sp. production units. This model, significant at 95 % confidence level, explains 68 % of the wood volume variation.

  11. Análise de índices biofísicos a partir de imagens TM Landsat 5 em paisagem heterogênea no Sudoeste da Amazônia

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    Rodrigo Tartari

    2015-11-01

    Full Text Available O sudoeste da Amazônia Brasileira é composto por um mosaico de paisagem com transição de campos naturais e floresta ombrófila densa. A bacia do rio Puruzinho, localizada no “Arco do Desmatamento” no interflúvio Purus-Madeira, tem passado por mudança no uso e cobertura da terra. Assim, o objetivo deste estudo foi avaliar a variação espacial de índices biofísicos de uma paisagem heterogênea na bacia hidrográfica do rio Puruzinho. O índice de vegetação da diferença normalizada (NDVI, índice de área foliar (IAF, temperatura da superfície, albedo e saldo de radiação da superfície (Rn foram estimados pelo SEBAL (Surface Energy Balance Algorithm for Land a partir de imagens TM Landsat 5, e analisados sobre floresta densa, campos naturais, área desmatada e área urbana de Humaitá-AM. Todos os índices biofísicos foram significativamente diferentes, considerando o uso e cobertura da terra. Os índices biofísicos apresentaram padrão inverso entre a área urbana e a floresta densa, com menor NDVI, IAF e saldo de radiação e maior temperatura e albedo da superfície na área urbana. Portanto, as variáveis estimadas pelo SEBAL foram adequadas para avaliar o efeito das mudanças no uso do solo sobre as variáveis estimadas e distinguir áreas antropizadas de áreas naturais.

  12. Uso de imagens TM/Landsat-5 e termometria na identificação e mapeamento de solos afetados por sais na região de Sousa, PB TM/Landsat-5 images and thermometry in the identification and mapping of salt affected soils in the region of Sousa, Brazil

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    Cícero O. Lima

    2001-05-01

    Full Text Available A região de São Gonçalo/Baixada de Sousa é um dos principais centros agrícolas do Estado da Paraíba. O manejo inadequado das terras e da irrigação tem sido responsável pela redução do rendimento das culturas e pela degradação dos solos, por salinização. Na mitigação das vulnerabilidades agrícolas, o geoprocessamento está consolidado como ferramenta poderosa no estudo e monitoramento do meio ambiente, visando ao desenvolvimento sustentável, com diminuição dos riscos a desastres. O objetivo deste trabalho foi o uso de imagens TM/Landsat-5 (análise visual e processamento digital, de medidas superficiais de temperatura e de um SIG na identificação e mapeamento de solos afetados por sais. Os resultados mostraram que, ao longo dos últimos anos, houve incremento da área de solos degradados pela salinização e, hoje, aproximadamente 39,48% da área estudada apresentam ocorrência de solos afetados por sais.The São Gonçalo/Baixada de Sousa region is one of the main agricultural centers of the State of Paraíba. The inadequate management of the lands and irrigation has been responsible for the reduction of the agriculture income and for the soil degradation by salt. In the mitigation of the agricultural vulnerabilities, geoprocessing is consolidated as a powerful tool in the study and monitoring of the environment, aiming at sustainable development with risk reduction of disasters. The objective of this work was the use of TM/Landsat-5 images (visual analysis and digital processing, superficial measures of temperatures and a GIS in the identification and mapping of salt affected soils. The results showed that along the last years the area of soil degradation by salt had increased and today approximately 39.48% of the studied area presents salt affected soils.

  13. Estimativa da taxa de desmatamento do município de bannach, pará - amazônia legal, utilizando imagens landsat5/tm Estimation of deforestation rate in bannach municipality, pará state - amazon, using images landsat5/tm

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    Christiano Luna Arraes

    2010-12-01

    Full Text Available A Amazônia, maior floresta tropical do planeta, apresenta uma superfície de aproximadamente 6,4 milhões de quilômetros quadrados na América do Sul e ocupa 63% do território Brasileiro. Devido ao desmatamento, o monitoramento dessas áreas se faz necessário, principalmente pelo avanço das fronteiras agrícolas. Assim, o presente trabalho tem como objetivo estimar a taxa de desmatamento anual e diária para o Município de Bannach, Pará, Brasil. Foram adquiridas imagens do satélite Landsat 5, sensor TM (Thematic Mapper, para os anos de 1997 a 2009. Utilizou-se a classificação supervisionada por Maximum Likelihood. O índice de exatidão global apresentou resultados superiores a 90% e índices Kappa superiores a 0,83 para todos os anos de estudo. Ao longo da série temporal, observa-se um aumento do desmatamento de forma contínua, acarretado principalmente pela pecuária.The Amazon, the planet’s largest rain forest, has an area of approximately 6.4 million square kilometers in South America and occupies 63% of the Brazilian territory. Due to deforestation, the monitoring of these areas is needed, mainly by the expansion of management of the productive farming process. Thus, this study aims to estimate the annual and daily rate of deforestation for the Municipality of Bannach, Para State, Brazil. The Landsat images, sensor 5 TM (Thematic Mapper from 1997 to 2009 years were used. The supervised classification by Maximum Likelihood was made for analysis the deforestation rate. The index showed an overall accuracy results above 90% and the Kappa index above 0.83 for all years of study. Therefore, throughout the series, there is an increase in deforestation continuously with mainly land use by livestock.

  14. Aerofotos convencionais e imagens orbitais TM/LANDSAT no mapeamento morfopedológico em Santa Bárbara D'Oeste (SP Mapping and fisiographic characterization of soils using conventional aerial photographs and orbital images TM/LANDSAT-5 in Santa Bárbara D'Oeste (SP

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    J.A.M. Demattê

    1993-12-01

    Full Text Available Foram estudados, com o auxílio de fotografias aéreas, aspectos qualitativos e quantitativos do relevo e da rede de drenagem de solos de uma área de Santa Bárbara D'Oeste, SP. Esta região compreende 14.625 ha, onde foram selecionadas bacias hidrográficas de 3ª ordem de ramificação e amostras circulares de 5km². As unidades de mapeamento simples ou associações de solos são: Latossolo Vermelho Escuro, Podzólico, Litossolo + Podzólico, Terra Roxa Estruturada + Latossolo Roxo distrófico. Após a caracterização das feições fisiográficas, da área de ocorrência desses solos, foram realizados dois mapas morfopedológicos. No primeiro utilizou-se fotografias aéreas verticais pancromáticas na escala 1: 35.000 (data de 25/6/78 e no segundo imagens orbitais do sensor "Thematic Mapper" do LANDSAT-5, nas bandas 3, 4 e 5 e composição colorida 3/4/5 na escala 1: 100.000 (data de 12/9/91. As análises qualitativas e quantitativas do relevo (índice de declividade média e rede de drenagem (densidade de drenagem, freqüência de rios, razão de textura mostraram-se eficientes na diferenciação das unidades de solo estudadas, tanto em bacias hidrográficas como em amostras circulares. A utilização de fotografias aéreas, permitiu maior riqueza de detalhes na precisão dos limites das unidades de mapeamento e no maior número de unidades de mapeamento discriminadas em relação as imagens orbitais. A composição colorida 3/4/5 permitiu diferenciar os Latossolos argilosos dos Latossolos de textura média, assim como o Latossolo Húmico.Using aerial photographs quantitative and qualitative parameters of drainage patterns and landscape were studied in an area located in Santa Barbara D'Oeste,SP. This area has 14,625 ha, represented by the following simple map units or associations: Dark Red Latosols; Red Yellow Podzoh'c associated with some Lithosols; Dusky Latosol associated with "Terra Roxa Estruturada" (a Rodudal. Sampling areas were

  15. Análise da expansão urbana no entorno da Lagoa Grande e Lagoa da Tabua no município de Feira de Santana-BA a partir de série histórica de imagens Landsat MSS, TM e ETM

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    Alarcon Matos de Oliveira

    2014-10-01

    Full Text Available É crescente a necessidade de proteção dos recursos hídricos, em especial os mananciais urbanos, uma vez que são constantemente “invadidos” pela expansão desordenada das cidades. Nesse sentido, as ferramentas de análise espacial, o sensoriamento remoto e a cartografia constituem um poderoso instrumento de avaliação dos impactos ambientais. Tais ferramentas foram exploradas nesse trabalho, cujo objetivo é realizar mapeamento multitemporal do entorno da Lagoa Grande e Lagoa da Tabua, município de Feira de Santana/BA, no período de 1975 a 2008. A escolha desse período deve-se ao fato do grande crescimento populacional, ocasionado pela industrialização do município. Para realização do trabalho foram  utilizadas imagens de satélites, disponíveis pela Divisão de Geração de Imagens – DGI do Instituto Nacional de Pesquisas Espaciais – INPE, dos sensores MSS, TM do programa LANDSAT. Os procedimentos técnicos adotados na construção desse trabalho consistiram nas seguintes etapas: georreferenciamento das imagens; seleção da composição colorida, com aplicação de técnicas de realce e contraste; e classificação supervisionada, um método clássico de processamento, dando foco maior a avaliação das imagens empregadas (sazonalidade da região e ao correlacionamento do impacto ambiental com os resultados. Foi possível, através deste método identificar alguns indicadores de desequilíbrio ambiental, como por exemplo, o avanço do espaço urbano implicando em sedimentação da Lagoa da Tabua, e na presença de Taboa, vegetação aquática comum em áreas muito poluídas na Lagoa Grande.

  16. Landsat Program

    Science.gov (United States)

    Markham, Brian L.; Arvidson, Terry; Barsi, Julia A.; Choate, Michael; Kaita, Edward; Levy, Raviv; Lubke, Mark; Masek, Jeffrey G.

    2016-01-01

    Landsat initiated the revolution in moderate resolution Earth remote sensing in the 1970s. With seven successful missions over 40+ years, Landsat has documented - and continues to document - the global Earth land surface and its evolution. The Landsat missions and sensors have evolved along with the technology from a demonstration project in the analog world of visual interpretation to an operational mission in the digital world, with incremental improvements along the way in terms of spectral, spatial, radiometric and geometric performance as well as acquisition strategy, data availability, and products.

  17. Imagens e contra imagens da favela

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    Mário Hélio Trindade de Lima

    2008-01-01

    Full Text Available O presente artigo aborda as representações sociais da pobreza urbana no Brasil. O objeto de estudo é, por um lado, o conjunto de discursos e imagens sobre a favela na imprensa e, por outro lado, as auto-representações visuais de favelas e periferias da cidade do Rio de Janeiro, na virada do século XXI. O objetivo é analisar o uso da categoria favela na formação do imaginário social da cidade e, ao mesmo tempo, investigar como se constrói o olhar periférico nas representações fotográficas dos moradores de favelas. O método empregado baseia-se nas contribuições de Pierre Bourdieu e de Roland Barthes para a análise do discurso e nas contribuições da antropologia visual e da história cultural para a análise da fotografia enquanto campo documental na etnografia. Os resultados revelam um movimento de constituição de novas subjetividades no cenário das grandes cidades dos anos 90, por meio da ação de ONG’s nas favelas, criando um espaço de reflexão sobre si e sobre o outro e de afirmação de novas identidades.

  18. La imagen del pase.

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    Hernando Bernal.

    1999-11-01

    Full Text Available A partir de un texto del poeta Octavio Paz llamado «La imagen», se busca proseguir la equivalencia entre las imágenes de la poesía y la función que ellas tienen para el poeta, y el fantasma fundamental y su función para el analizante que está en el momento del pase. Se parte de la idea de que la poesía busca entrar en el ser así como el psicoanálisis tiene como finalidad apuntar al corazón del ser del sujeto. Se hace entonces una distinción del concepto de «ser» para el psicoanálisis, haciendo alusión también al discurso de la filosofía. Esclarecido el sentido de lo que es el «ser» para el psicoanálisis, se aborda de lleno – entre otras cosas, relacionadas con la experiencia del pase específicamente- la equivalencia entre la definición que hace Octavio Paz de «La Imagen» y el momento del pase en el análisis de un sujeto, imagen que, al igual que el mito para la filosofía, las leyes para la ciencia y el matema para el psicoanálisis, se constituyen en los instrumentos con los que cada una de estas disciplinas horadan en lo real.

  19. APLICAÇÃO DE IMAGENS IKONOS II E TM/LANDSAT-5 NA ELABORAÇÃO DE UMA BASE CARTOGRÁFICA PARA A RESERVA DE DESENVOLVIMENTO SUSTENTÁVEL MAMIRAUÁ – AMAZONAS / APPLICATION OF IKONOS II AND TM/LANDSAT-5 SATELLITES DATA FOR DIGITAL BASE MAPPING THE SUSTAINABLE DEVELOPMENT RESERVE MAMIRAUÁ, AMAZON, BRAZIL

    Directory of Open Access Journals (Sweden)

    Josimara Martins Dias

    2009-12-01

    Full Text Available This paper has as purpose present the methodology developed to produce an updated digital map base support for participatory management Mamirauá Reserve of Sustainable Development in the state of Amazonas, Braszil. Because this protected área is situated within an area of flooded forest, both the physical landscape and social organization often change, and the dynamic demand the systematic update of cartographic databases. This work has images of orbital sensors IKONOS II and LANDSAT 5 TM, interviews with users and collecting spatial data in the Mamirauá Reserve. This work obtained a cartographic base at 1:100.000 scale and a geodatabase compatible with the local references, with which is possible to generate thematic maps updated to support dialogue in the sustainable management programs of the Mamirauá Reserve and minimize conflicts with communities.

  20. Radar, geologic, airborne gamma ray and Landsat TM digital data integration for geological mapping of the Estrela granite complex (Para State); Integracao digital de imagens de radar e Landsat-TM com dados geologicos e aerogamaespectrometricos no auxilio ao mapeamento geologico da regiao do complexo granitico Estrela-Para (PA)

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, Edson Ricardo Soares Pereira da

    2002-07-01

    This work is focused on the geotectonic context of the Carajas Mineral Province, Amazon Craton, which represents the most important Brazilian Mineral Province and hosts iron, cooper, gold, manganese and nickel deposits. At the end of Archean age, during the techno-metamorphic evolution, moderated alkaline granitoids were generated, such as, Estrela Granite Complex (EGC). This work has used digital integration products with the purpose of study the granite suite, its host rock, and the surrounded area. The digital integrated data were gamma-ray and geological data with satellite images (SAR-SAREX e TM-Landsat). The geophysics data, originally in 32 bits and grid format, were interpolated and converted to 8 bits images. The geological data (facies map) was digitalized and converted to a raster format. The remote sensing images were geometrically corrected to guarantee an accuracy on the geological mapping. On the data processing phase, SAR images were digital integrated with gamma-ray data, TM-Landsat image and the raster facies map. The IHS transformation was used as the technique to integrate the multi-source data. On the photogeological interpretation, SAR data were extremely important to permit the extraction of the main tectonic lineaments which occur on the following directions: +/- N45W, +/- N70W, +/- NS, +/- N20E, +/- N45E e +/- N75E. This procedure was done both in analogic and automatic form, being the automatic process more useful to complement information in the extracting process. Among the digital products generated, SAR/GAMA products (uranium, thorium and total count) were the ones that give the most important contribution. The interpretation of the SAR/GAMA's products added to the field campaign have allowed to map the limits of units that occur in the region and four facies of the Estrela Granite Complex were detected. The origin of the granite suite might be related to a magmatic differentiation or to distinct intrusion pulses. The use of the

  1. Using Landsat satellite imagery to detect small-size forest stands of Pinus nigra Arn. and Pinus sylvestris L. affected by Scolytidae; Uso de imagenes satelite Landsat para la deteccion de rodales de Pinus nigra Arn. y Pinus sylvestris L. afectados por escolitidos

    Energy Technology Data Exchange (ETDEWEB)

    Blanco, E.; Bonet, J. A.; Eizaguirre, M.

    2009-07-01

    Medium resolution images from multispectral sensors like Landsat TM have been extensively used for decades in order to identify decline and defoliation generated by insects and other forest pests. The present work analyses the usefulness of these kinds of images to detect small-size stands of Pinus nigra Arn. and Pinus sylvestris L. affected by Scolytidae attacks. The study area was located in the Solsones region (Eastern Pyrenees), selecting 34 training zones (17 damaged small-size stands and 17 healthy small-size stands). The exploratory analysis of the images was conducted with the ERDAS IMAGINE 8.x. program.The results of the study showed significant differences between the affected and non-affected stands in 5 of the 7 spectral bands analysed. TM5 and TM7 bands were identified as those having the highest power to detect damaged stands. The digital levels obtained and the spaces of characteristics created, both showed trends to group small-size affected stands versus healthy, achieving improvements in the methodological procedure employed. (Author) 31 refs.

  2. Entre palabra, escritura e imagen

    Directory of Open Access Journals (Sweden)

    José Sánchez Parga

    2015-01-01

    Full Text Available Plantea el autor que, hace quinientos años, cuando se produjo el encuentro entre la cultura europea y las americanas junto con la conquista y la dominación colonial se instauró un régimen de comunicación en el que se reprodujo una situación de incomunicación y transcomunicaciones hasta ahora existentes. Se refiere el autor también a la violencia verbal y la ley del silencio, a lo que se entiende por mundo andino, a la comunicación como intercambio, la tradición oral-galaxia radial, la dominación gráfica, la Biblia-Gramática- leyes de Indias, Otavalo, quema de papeles, Guamán Poma, el imperialismo de la imagen, destrucción de ídolos, imagen cristiana colonizadora, imperialismo de la imagen, resistencia cultural, importancia de la virgen y el neocolonialismo electrónico.

  3. Imagens semoventes, imagens co-moventes: interfaces visuais no webjornalismo

    Directory of Open Access Journals (Sweden)

    Dulcilia H. Schroeder Buitoni

    2010-02-01

    Full Text Available As imagens presentes no webjornalismo utilizam recursos de hipermídia? Este artigo parte da constatação de que as tecnologias digitais ainda são pouco exploradas. A observação de jornais e sites jornalísticos – auxiliada pela reflexão sobre conceitos de hipertexto, hipermídia e imagem complexa – leva à escolha de algumas produções audiovisuais exemplares. Foram selecionados três especiais da seção "Multimedia" do argentino Clarin.com, que trazem caminhos inovadores, principalmente quanto ao tratamento da imagem de matriz fotográfica. Além da ampliação das potencialidades visuais, a imagem funciona como interface e conexão.

  4. Detecção de áreas agrícolas em tempo quase real com imagens Modis

    Directory of Open Access Journals (Sweden)

    Isaque Daniel Rocha Eberhardt

    2015-07-01

    Full Text Available Resumo: O objetivo deste trabalho foi desenvolver um método para identificação e monitoramento, em tempo quase real, de áreas agrícolas cultivadas com lavouras temporárias de verão, com uso de imagens orbitais Modis, no Estado do Rio Grande do Sul. A metodologia foi denominada detecção de áreas agrícolas em tempo quase real (DATQuaR e utiliza imagens do sensor Modis referentes aos índices de vegetação (IVs EVI e NDVI, disponibilizadas em composições de 16 dias. Foram utilizadas quatro métricas para agregar os valores de IVs por pixel, dentro dos períodos bimensais avaliados: média, máximo, mínimo e mediana. Para gerar as imagens (ImDATQuaR, a imagem agregada para o período imediatamente anterior foi subtraída da imagem agregada para o período em monitoramento. Essas imagens foram classificadas por meio de fatiamento e comparadas às classes de referência obtidas pela interpretação visual de pixels aleatorizados em imagens Landsat. Cada ImDATQuaR gerou dois mapas DATQuaR: um com filtragem de moda com janela 3x3 pixels e outro sem filtragem. O melhor mapa DATQuaR é produzido com uso de imagens EVI e filtragem - ao se subtrair a imagem de mínimo valor para o período anterior da imagem de máximo valor para o período monitorado - e atinge concordâncias com a referência superiores a 81%.

  5. Imagen narrativa: De la imagen prehistórica a las tecnologías de la imagen

    Directory of Open Access Journals (Sweden)

    Vicente Peña Timón

    2012-04-01

    Full Text Available El artículo está estructurado en dos partes. La primera, titulada La narración icónica en la prehistoria, explica el porqué, ya en aquella época, existían "narraciones", donde "alguien" contaba "algo" acerca de "otro alguien", ocurrido en "algún sitio", en un "momento dado". También se expone cómo esta construcción narrativa es el inicio de lo que se ha llegado a denominar imagen narrativa. En la segunda parte, titulada Perspectiva histórica de la imagen narrativa, se realiza un sucinto recorrido histórico,  para poner de manifiesto el protagonismo que siempre ha revelado la Imagen en el devenir y desarrollo de los Pueblos.

  6. Landsat and water pollution

    Science.gov (United States)

    Castruccio, P.; Fowler, T.; Loats, H., Jr.

    1979-01-01

    Report presents data derived from satellite images predicting pollution loads after rainfall. It explains method for converting Landsat images of Eastern United States into cover maps for Baltimore/five county region.

  7. Landsat's international partners

    Science.gov (United States)

    Byrnes, Raymond A.

    2012-01-01

    Since the launch of the first Landsat satellite 40 years ago, International Cooperators (ICs) have formed a key strategic alliance with the U.S. Geological Survey (USGS) to not only engage in Landsat data downlink services but also to enable a foundation for scientific and technical collaboration. The map below shows the locations of all ground stations operated by the United States and IC ground station network for the direct downlink and distribution of Landsat 5 (L5) and Landsat 7 (L7) image data. The circles show the approximate area over which each station has the capability for direct reception of Landsat data. The red circles show the components of the L5 ground station network, the green circles show components of the L7 station network, and the dashed circles show stations with dual (L5 and L7) status. The yellow circles show L5 short-term ("campaign") stations that contribute to the USGS Landsat archive. Ground stations in South Dakota and Australia currently serve as the primary data capture facilities for the USGS Landsat Ground Network (LGN). The Landsat Ground Station (LGS) is located at the USGS Earth Resources Observation and Science (EROS) Center in Sioux Falls, South Dakota. The Alice Springs (ASN) ground station is located at the Geoscience Australia facility in Alice Springs, Australia. These sites receive the image data, via X-band Radio Frequency (RF) link, and the spacecraft housekeeping data, via S-band RF link. LGS also provides tracking services and a command link to the spacecrafts.

  8. ESTUDO COMPARATIVO ENTRE OS ÍNDICES NDVI OBTIDOS A PARTIR DOS SENSORES LANDSAT 5 - TM E RESOURCESAT - LISS III

    Directory of Open Access Journals (Sweden)

    Cesar Vinícius Mendes Nery

    2013-07-01

    Full Text Available A importância das imagens de sensoriamento remoto para o monitoramento da cobertura vegetal é algo inegável. Por mais de três décadas a série Landsat tem fornecido imagens da terra, porém a partir de novembro de 2011 o satélite interrompeu a disponibilização de suas imagens para o monitoramento ambiental. Uma das alternativas de imagens ao Landsat têm sido as imagens do sensor LISS III a bordo do satélite indiano Resourcesat 1. O presente trabalho tem como área de estudo o município de Janaúba, por estar em uma área de transição de dois biomas, e o mesmo tem por objetivo comparar os dois sensores, o sensor TM que se encontra a bordo do satélite Landsat 5 e o sensor LISS III a bordo do satélite Resourcesat 1. Para esse estudo comparativo as imagens foram adquiridas do site do Instituto Nacional de Pesquisas Espaciais (INPE e seus valores de níveis digitais (ND foram convertidos em reflectância com correção atmosférica utilizando o método de correção DOS. Amostras de pixels das imagens índice foram coletadas para o estudo de correlação e ajuste de uma equação linear por meio da técnica de regressão. Utilizando a equação ajustada foram gerados dois mapas temáticos de ambos os sensores, sendo os mesmos comparados pelo teste estatístico Kappa. Os resultados mostraram uma forte correlação entre os valores de NDVI (0,81, sendo possível o ajuste de uma equação linear que expresse a forma dessa relação. O sensor TM, superestimou os valores de NDVI em relação ao sensor LISS III (Inclinação de 1,1035. O valor de Kappa para os mapas temáticos obtidos foi de 0,5894 e o índice de acerto foi de 98,81%, o que mostra uma boa similaridade entre eles. O sensor LISS III pode ser perfeitamente utilizado como alternativa ao Landsat 5.

  9. Landsat Data Continuity Mission

    Science.gov (United States)

    ,

    2012-01-01

    The Landsat Data Continuity Mission (LDCM) is a partnership formed between the National Aeronautics and Space Administration (NASA) and the U.S. Geological Survey (USGS) to place the next Landsat satellite in orbit in January 2013. The Landsat era that began in 1972 will become a nearly 41-year global land record with the successful launch and operation of the LDCM. The LDCM will continue the acquisition, archiving, and distribution of multispectral imagery affording global, synoptic, and repetitive coverage of the Earth's land surfaces at a scale where natural and human-induced changes can be detected, differentiated, characterized, and monitored over time. The mission objectives of the LDCM are to (1) collect and archive medium resolution (30-meter spatial resolution) multispectral image data affording seasonal coverage of the global landmasses for a period of no less than 5 years; (2) ensure that LDCM data are sufficiently consistent with data from the earlier Landsat missions in terms of acquisition geometry, calibration, coverage characteristics, spectral characteristics, output product quality, and data availability to permit studies of landcover and land-use change over time; and (3) distribute LDCM data products to the general public on a nondiscriminatory basis at no cost to the user.

  10. Uso de imagens orbitais como base de dados para projetos de reforma agrária The use of orbital images as subsidies to agrarian reform projects

    Directory of Open Access Journals (Sweden)

    Marina de Fátima Vilela

    2005-08-01

    Full Text Available Análises técnica e econômica foram realizadas em imagens dos sensores IKONOS, TM/Landsat 5, ETM+/Landsat 7 e CCD/CBERS, objetivando a verificação da viabilidade destas como base de dados em projetos de reforma agrária. Essas análises efetuadas e a situação de mercado indicaram que a imagem IKONOS apresenta excelente desempenho técnico, mas o custo de aquisição inviabiliza sua utilização como base de dados para a reforma agrária. A imagem do Landsat 7, com baixo custo de aquisição, apresentou grande viabilidade técnica para fins de reforma agrária. No entanto, a perda do contato com a plataforma Landsat 7 inviabilizou a compra de novas imagens do sensor ETM+. A imagem CCD/CBERS apresentou a segunda maior similaridade com a verdade de campo e o menor índice Kappa para a classificação. Apesar do baixo índice de exatidão para a classificação, as análises de custo, o lançamento do CBERS-2 e a possibilidade de correção dos problemas de radiometria podem tornar as imagens da plataforma CBERS-2 concorrentes de peso no mercado e, ainda, preencher a lacuna deixada pela perda do Landsat 7. A imagem do Landsat 5 apresentou o mais baixo desempenho técnico nas análises efetuadas. Entretanto, seu potencial como base de dados é amplamente reconhecido pelo INCRA, que ainda utiliza tais imagens. O declínio da vida útil do Landsat-5 atribui mais importância ao lançamento do CBERS-2.Technical and economical analyses were performed on IKONOS, Landsat TM 5 and Landsat ETM+ 7 and CCD/CBERS data in order to verify their feasibilities to subsidy agrarian reform projects. Results showed that IKONOS data presented excellent technical viability but its high cost prevents its use. Landsat ETM+ 7 data, with low cost, presented good technical viability, however due to the problems occurring in the satellite operation, its use was also prevented . CCD/CBERS data presented the second best similarity with the ground truth data, although it

  11. La imagen al servicio de la literatura

    Directory of Open Access Journals (Sweden)

    Aleix Cort

    2015-07-01

    Full Text Available http://dx.doi.org/10.5007/1807-9288.2015v11n1p173 El artículo mostrará el largo viaje realizado hasta el momento por la palabra y la imagen a través de los siglos para incidir en la importancia de conocer la historia como forma de avanzar hacia el futuro.

  12. A árvore de imagens

    Directory of Open Access Journals (Sweden)

    Jean-Jacques Wunenburger

    2018-01-01

    Full Text Available Recuperando possíveis consensos entre o conceito de imagem e sua representação perceptiva, esse artigo apresenta uma terceira via que examina a problemática da imagem a partir de sua origem simbólica. A análise leva em conta, ao mesmo tempo, a subjetividade e a objetividade da imagem, para propor não só uma classificação como também uma ordenação hierárquica consoante sua fertilidade simbólica. Para isso, apresenta a metáfora da árvore de imagens, em que as folhas equivalem à relação com o mundo exterior, a imageria; o tronco, que poderia ser chamado de imaginário, possibilita o trânsito entre a copa e as raízes; essas últimas abrigariam o imaginal, em correlação com o substrato arquetipológico. A partir dessa ilustração, é possível observar o ciclo das imagens, compreendendo como suas várias manifestações estão ligadas a uma amálgama suprassensível que atribui às imagens uma pujança simbolizante, não limitada ao conceito nem ao sentido, pois se lhes antecede.

  13. Landsat 6 contract signed

    Science.gov (United States)

    Maggs, William Ward

    A new agreement provides $220 million for development and construction of the Landsat 6 remote sensing satellite and its ground systems. The contract, signed on March 31, 1988, by the Department of Commerce (DOC) and the Earth Observation Satellite (EOSAT) Company of Lanham, Md., came just days after approval of DOC's Landsat commercialization plan by subcommittees of the House and Senate appropriations committees.The Landsat 6 spacecraft is due to be launched into orbit on a Titan II rocket in June 1991 from Vandenburg Air Force Base, Calif. The satellite will carry an Enhanced Thematic Mapper (ETM) sensor, an instrument sensitive to electromagnetic radiation in seven ranges or bands of wavelengths. The satellite's payload will also include the Sea Wide Field Sensor (Sea-WiFS), designed to provide information on sea surface temperature and ocean color. The sensor is being developed in a cooperative effort by EOSAT and the National Aeronautics and Space Administration (NASA). A less certain passenger is a proposed 5-m resolution, three-band sensor sensitive to visible light. EOSAT is trying to find both private financing for the device and potential buyers of the high-resolution imagery that it could produce. The company has been actively courting U.S. television networks, which have in the past used imagery from the European Système Probatoire d'Observation de la Terre (SPOT) satellite for news coverage.

  14. Importância da alteração do Histograma de Imagem de Alta Resolução (PAN para fusão de imagens digitais pelo método de componentes principais / The importance of Histogram Alteration in High Resolution Image (PAN for merging digital images by means of the principal components method

    Directory of Open Access Journals (Sweden)

    Ricardo Kwiatkowski Silva

    2009-04-01

    Full Text Available ResumoA fusão de imagens é um tema que despertou novo interesse devido à coleta simultânea de imagens multiespectrais e pancromáticas com diferentes resoluções. O método de fusão ganhou grande reconhecimento quando imagens LANDSAT, multiespectral, puderam ser combinadas com imagens SPOT, pancromáticas. O processo comprovou ser útil na geração de imagens híbridas que combinam as propriedades das imagens originais numa única nova imagem que preserva a informação espectral e possui uma melhor informação espacial. O resultado é uma nova imagem com melhor resolução espacial e a mesma resolução espectral. Este artigo apresenta o método de fusão de imagens por substituição por Componentes Principais com e sem alteração do histograma. Para a aplicação deste método, duas imagens de alta resolução espacial foram usadas, multiespectral e PAN do satélite Quickbird.AbstractImage merging is a subject that attracted new interest due to the simultaneous assembling of multispectral and PAN images with different resolutions. The merging approach became renown when multispectral Landsat images could be matched with panchromatic SPOT ones. The process was useful for generating hybrid images that combine properties from the originals in a new unique image that maintains the spectral information and features better spatial information. The result is a new image with better spatial resolution and the same spectral resolution. This paper considers the substitution merging method by Principal Components with and without histogram alteration. In order to apply this method, two high resolution spatial images were used, namely the multispectral and PAN from the Quickbird satellite.

  15. TV: la captura en la imagen

    OpenAIRE

    Roberto A. Follari

    2015-01-01

    "La cultura posmoderna que vivimos, en un mundo dominado por la omnipresencia del vídeo y la televisión es decir una cultura visual, nos hace sentir más como sujetos de ciencia ficción que como terminales de computadoras que como agentes de actividad", afirma el autor en esta reflexión en dos tiempos sobre lo visual y la posmodernidad. La invasión de la imagen artificial, del hiperrealismo en formato spot publicitario es absoluta, El género zapping es ahora una modalidad de conformación de la...

  16. Multispectral Landsat images of Antartica

    Energy Technology Data Exchange (ETDEWEB)

    Lucchitta, B.K.; Bowell, J.A.; Edwards, K.L.; Eliason, E.M.; Fergurson, H.M.

    1988-01-01

    The U.S. Geological Survey has a program to map Antarctica by using colored, digitally enhanced Landsat multispectral scanner images to increase existing map coverage and to improve upon previously published Landsat maps. This report is a compilation of images and image mosaic that covers four complete and two partial 1:250,000-scale quadrangles of the McMurdo Sound region.

  17. La imagen: una venta en silencio

    Directory of Open Access Journals (Sweden)

    Harold Silva Guerra

    2014-01-01

    Full Text Available Uno de los aspectos más importantes y que más gravita en el éxito financiero de una empresa es su imagen. Por eso, el manejo de la misma, es trascendental, porque no solo se debe pretender que sea competitiva, sino que armonice con la responsabilidad social y ambiental del todo el entorno, y que siempre sea recordada por los clientes, con gratitud y que permanezca en el universo de suspreferencias. Para ello, deben comulgar tantas cosas positivas que van desde el buen servicio al cliente, pasando por la calidad de productos que se ofrecen, hasta el impacto que cause en los compradores los símbolos cuidadosamente elegidos los cuales contribuyan a una fijación mental positiva y duradera.Palabras clave: Imagen; identidad; reputación; cliente.The image: a sale in silenceAbstrac One of the most important aspects, which supports the financial success of a company, is its image. Therefore, the management of it, is transcendental, as it does not only pretend to be competitive, but also that harmonize with the social and environmental responsibility of the whole surroundings, and that it always will be remembered by customers, with gratitude and remain in the universe of their preferences. for that many positive things must coincide, ranging from good customer service, to the quality of products offered, to the impact cause on the buyers the carefully chosen symbols, which contribute to a positive and lasting mental fixation.Keywords: Image; identity; reputation; customer.

  18. LandSAT TM 1994

    Data.gov (United States)

    Kansas Data Access and Support Center — Before the Landsat commercialization contract was signed between the Department of Commerce and the Earth Observation Satellite Company (EOSAT) on September 27,...

  19. Um método simplificado de fusão de imagens para fins de interpretação visual = A simplified merging method applied to image data for purposes of visual interpretation

    Directory of Open Access Journals (Sweden)

    Selma Regina Aranha Ribeiro

    2009-01-01

    Full Text Available A fusão de imagens é um tema que desperta interesse pela coleta de imagens multiespectrais e pancromáticas com diferentes resoluções espaciais e espectrais. O método de fusão ganhou grande reconhecimento quando imagens Landsat multiespectrais puderamser combinadas com imagens SPOT pancromáticas. Esse processo comprovou ser útil na geração de imagens híbridas que combinam as propriedades das imagens originais numa única nova imagem, que preserva a informação espectral e possui melhor informaçãoespacial. O resultado é uma nova imagem com maior resolução espacial e preservação da maior resolução espectral. Este documento apresenta o método I1I2I3, introduzido por Ohta et al. (1980, como uma opção de fusão por substituição em relação ao método RGBIHS. Para aplicar o método I1I2I3 e o RGB-IHS, duas imagens de altas resoluções foramutilizadas, Ikonos II e Quickbird.Image merging is a topic that has drawn new interest due to theacquirement of multispectral and panchromatic images with different resolutions. The merging approach received great recognition when multispectral Landsat images were matched with panchromatic SPOT images. This process proved to be useful for generating hybrid images that combine properties from the originals into a new unique image, still maintaining spectral information and featuring improved spatial information. The result is a new image with better spatial and preserved spectral resolution. This paper presents the I1I2I3 merging method, introduced by Ohta et al. (1980, as an option for image merging through substitution in relation to the RGB-HSI method. In order to apply the I1I2I3 and RGB-HIS methods, two high resolution images were utilized, Ikonos II and Quickbird.

  20. NASA 3D Models: Landsat 7

    Data.gov (United States)

    National Aeronautics and Space Administration — The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey. Since 1972, Landsat satellites have...

  1. Principales componentes de la imagen corporativa de entidades culturales

    Directory of Open Access Journals (Sweden)

    María Ramis Carrasco

    2016-11-01

    Full Text Available En el presente articulo se lleva a cabo un análisis de la imagen corporativa de una entidad cultural con el objetivo de destacar la importancia de la misma a la hora de elaborar estrategias relacionadas con la gestión cultural. Se ha investigado qué atributos concretos son mejor valorados por el público y qué dimensiones generales componen la imagen corporativa de la entidad. Basándonos en la literatura revisada, se ha realizado una entrevista en profundidad al gestor de programación de la entidad y una encuesta descriptiva a sus espectadores mediante un cuestionario estructurado. Los resultados de los análisis muestran que la imagen corporativa de la entidad analizada es positiva, si bien es cierto que se pueden mejorar ciertos aspectos.

  2. Identidad e imagen en Justo Villafañe

    Directory of Open Access Journals (Sweden)

    Diógenes D. Mayol Marcó

    2010-01-01

    Full Text Available De la lectura de los dos primeros capítulos del libro Imagen positiva, de Justo Villafañe, surgieron en nosotros una serie de preguntas en torno a la equivalencia entre identidad y el trío de variables comportamiento-cultura-personalidad corporativas y, particularmente, entre cultura e identidad corporativa; las imágenes funcional, organizacional e intencional propuestas por el autor, así como la presentación de la imagen corporativa, en cuanto síntesis gestáltica, lo que nos llevó a revisar los planteamientos del catedrático y consultor español, a partir de su esquema relación entre identidad e imagen corporativas.

  3. Continuity of Landsat observations: Short term considerations

    Science.gov (United States)

    Wulder, Michael A.; White, Joanne C.; Masek, Jeffery G.; Dwyer, John L.; Roy, David P.

    2011-01-01

    As of writing in mid-2010, both Landsat-5 and -7 continue to function, with sufficient fuel to enable data collection until the launch of the Landsat Data Continuity Mission (LDCM) scheduled for December of 2012. Failure of one or both of Landsat-5 or -7 may result in a lack of Landsat data for a period of time until the 2012 launch. Although the potential risk of a component failure increases the longer the sensor's design life is exceeded, the possible gap in Landsat data acquisition is reduced with each passing day and the risk of Landsat imagery being unavailable diminishes for all except a handful of applications that are particularly data demanding. Advances in Landsat data compositing and fusion are providing opportunities to address issues associated with Landsat-7 SLC-off imagery and to mitigate a potential acquisition gap through the integration of imagery from different sensors. The latter will likely also provide short-term, regional solutions to application-specific needs for the continuity of Landsat-like observations. Our goal in this communication is not to minimize the community's concerns regarding a gap in Landsat observations, but rather to clarify how the current situation has evolved and provide an up-to-date understanding of the circumstances, implications, and mitigation options related to a potential gap in the Landsat data record.

  4. Landsat eyes help guard the world's forests

    Science.gov (United States)

    Campbell, Jon

    2017-03-03

    SummaryThe Landsat program is a joint effort between the U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA), but the partner agencies have distinct roles. NASA develops remote-sensing instruments and spacecraft, launches satellites, and validates their performance in orbit. The USGS owns and operates Landsat satellites in space and manages their data transmissions, including ground reception, archiving, product generation, and public distribution. In 2008, with support from the U.S. Department of the Interior, the USGS made its Landsat data free to anyone in the world.The current satellites in the Landsat program, Landsat 7 (launched in 1999) and Landsat 8 (launched in 2013), provide complete coverage of the Earth every eight days. A Landsat 9 satellite is scheduled for launch in late 2020.

  5. Sistemas de reconocimiento basados en la imagen facial

    OpenAIRE

    Arguello Fuentes, Henry

    2012-01-01

    Este artículo sintetiza las principales investigaciones que se están llevando a cabo en el área de los sistemas de reconocimiento a través de la imagen facial. Se realiza la descripción de las principales líneas de trabajo en los sistema de identificación de personas por medio de la imagen del rostro. Además, se realiza una síntesis de las últimas técnicas matemáticas para realizar la extracción de características dentro de estos sistemas de identificación.

  6. Os olhos de Saddam: imagens do inimigo

    Directory of Open Access Journals (Sweden)

    Isabella Pezzini

    2010-07-01

    Full Text Available Na representação jornalística da captura de Saddam Hussein, as fotografias são utilizadas como “atos de guerra” na representação dos inimigos, e enfatizadas pelos circuitos midiáticos. Saddam foi capturado em um refúgio escavado debaixo da terra na zona rural: as suas condições físicas eram dignas de piedade, e impiedosamente foram imortalizadas pelos fotógrafos embedded na captura. O aspecto de seu corpo transcurado, de seu rosto inchado, de seus cabelos e de sua barba desalinhados eram o contrário de sua imagem “em majestade” entronizada em mil variantes por todo o Iraque até pouco tempo atrás. O por em cena a estética do corpo sobre a qual Saddam – como muitos políticos não necessariamente tiranos – fundou a representação de seu próprio poder, foi destruída e a interpretação de degradação ultrapassou com grande facilidade a sua imagem de honra. Nas intenções dos inimigos, desgosto e vergonha colaboravam perfeitamente para a sinalização da vitória, enquanto, entre os espectadores da parte adversária só suscitavam mais raiva, indignação, ódio e desejo de vingança. Essas fotos de Saddam, assim como, em seguida, aquelas de seu enforcamento após a sua condenação, de tratamento grotesco, representam somente um dos episódios mais significativos de uma longa “guerra de imagens” que contrapõe ainda povos e culturas, sensibilidade religiosa e política, e torna o terreno da mídia, um espaço ulterior de desencontros, ao invés de construções possíveis de comunidade. O texto se fecha entre outros sobre o estatuto ambíguo que os jornais atribuem às imagens fotográficas, de um lado utilizadas como prova incontestável do discurso verbal e, de outro, continuamente pondo em causa esse último, que as interroga, as interpreta e as coloca em dúvida, construindo um discurso sincrético a ser lido sob diversas possibilidades isotópicas.

  7. Geologic mapping using LANDSAT data

    Science.gov (United States)

    Siegal, B. S.; Abrams, M. J.

    1976-01-01

    The feasibility of automated classification for lithologic mapping with LANDSAT digital data was evaluated using three classification algorithms. The two supervised algorithms analyzed, a linear discriminant analysis algorithm and a hybrid algorithm which incorporated the Parallelepiped algorithm and the Bayesian maximum likelihood function, were comparable in terms of accuracy; however, classification was only 50 per cent accurate. The linear discriminant analysis algorithm was three times as efficient as the hybrid approach. The unsupervised classification technique, which incorporated the CLUS algorithm, delineated the major lithologic boundaries and, in general, correctly classified the most prominent geologic units. The unsupervised algorithm was not as efficient nor as accurate as the supervised algorithms. Analysis of spectral data for the lithologic units in the 0.4 to 2.5 microns region indicated that a greater separability of the spectral signatures could be obtained using wavelength bands outside the region sensed by LANDSAT.

  8. Landsat imagery: a unique resource

    Science.gov (United States)

    Miller, H.; Sexton, N.; Koontz, L.

    2011-01-01

    Landsat satellites provide high-quality, multi-spectral imagery of the surface of the Earth. These moderate-resolution, remotely sensed images are not just pictures, but contain many layers of data collected at different points along the visible and invisible light spectrum. These data can be manipulated to reveal what the Earth’s surface looks like, including what types of vegetation are present or how a natural disaster has impacted an area (Fig. 1).

  9. Landsat Science Team meeting: Winter 2015

    Science.gov (United States)

    Schroeder, Todd A.; Loveland, Thomas; Wulder, Michael A.; Irons, James R.

    2015-01-01

    The summer meeting of the joint U.S. Geological Survey (USGS)–NASA Landsat Science Team (LST) was held at the USGS’s Earth Resources Observation and Science (EROS) Center July 7-9, 2015, in Sioux Falls, SD. The LST co-chairs, Tom Loveland [EROS—Senior Scientist] and Jim Irons [NASA’s Goddard Space Flight Center (GSFC)—Landsat 8 Project Scientist], opened the three-day meeting on an upbeat note following the recent successful launch of the European Space Agency’s Sentinel-2 mission on June 23, 2015 (see image on page 14), and the news that work on Landsat 9 has begun, with a projected launch date of 2023.With over 60 participants in attendance, this was the largest LST meeting ever held. Meeting topics on the first day included Sustainable Land Imaging and Landsat 9 development, Landsat 7 and 8 operations and data archiving, the Landsat 8 Thermal Infrared Sensor (TIRS) stray-light issue, and the successful Sentinel-2 launch. In addition, on days two and three the LST members presented updates on their Landsat science and applications research. All presentations are available at landsat.usgs.gov/science_LST_Team_ Meetings.php.

  10. Radiometric characterization of Landsat Collection 1 products

    Science.gov (United States)

    Micijevic, Esad; Haque, Md. Obaidul; Mishra, Nischal

    2017-09-01

    Landsat data in the U.S. Geological Survey (USGS) archive are being reprocessed to generate a tiered collection of consistently geolocated and radiometrically calibrated products that are suitable for time series analyses. With the implementation of the collection management, no major updates will be made to calibration of the Landsat sensors within a collection. Only calibration parameters needed to maintain the established calibration trends without an effect on derived environmental records will be regularly updated, while all other changes will be deferred to a new collection. This first collection, Collection 1, incorporates various radiometric calibration updates to all Landsat sensors including absolute and relative gains for Landsat 8 Operational Land Imager (OLI), stray light correction for Landsat 8 Thermal Infrared Sensor (TIRS), absolute gains for Landsat 4 and 5 Thematic Mappers (TM), recalibration of Landsat 1-5 Multispectral Scanners (MSS) to ensure radiometric consistency among different formats of archived MSS data, and a transfer of Landsat 8 OLI reflectance based calibration to all previous Landsat sensors. While all OLI/TIRS, ETM+ and majority of TM data have already been reprocessed to Collection 1, a completion of MSS and remaining TM data reprocessing is expected by the end of this year. It is important to note that, although still available for download from the USGS web pages, the products generated using the Pre-Collection processing do not benefit from the latest radiometric calibration updates. In this paper, we are assessing radiometry of solar reflective bands in Landsat Collection 1 products through analysis of trends in on-board calibrator and pseudo invariant site (PICS) responses.

  11. TEMPERATURA DE SUPERFÍCIE CELSIUS DO SENSOR TIRS/LANDSAT-8: METODOLOGIA E APLICAÇÕES

    Directory of Open Access Journals (Sweden)

    André Luiz Nascentes Coelho

    2013-11-01

    Full Text Available Este trabalho tem como objetivo, contribuir na difusão e operacionalização das geotecnologias, apresentando os algoritmos para obtenção de temperatura da superfície horizontal Celsius na faixa infravermelho termal do sensor TIRS/Landsat-8, banda 10. A aplicação das equações proporcionou não só identificar os maiores percentuais de temperatura de superfície, em diferentes escalas espaciais, como também, definir o perfil do campo térmico em distintas texturas. Além disso, foi possível comparar, em imagens, a melhoria da resolução espacial do canal infravermelho termal Landsat-8 em relação ao Landsat-5. Tal metodologia possibilita a aplicação em outros intervalos de datas e locais distintos, contribuindo nas pesquisas e no auxílio detomadas de decisões.

  12. TEMPERATURA DE SUPERFÍCIE CELSIUS DO SENSOR TIRS/LANDSAT-8: METODOLOGIA E APLICAÇÕES

    Directory of Open Access Journals (Sweden)

    André Luiz Nascentes Coelho

    2015-09-01

    Full Text Available Este trabalho tem como objetivo, contribuir na difusão e operacionalização das geotecnologias, apresentando os algoritmos para obtenção de temperatura da superfície horizontal Celsius na faixa infravermelho termal do sensor TIRS/Landsat-8, banda 10. A aplicação das equações proporcionou não só identificar os maiores percentuais de temperatura de superfície, em diferentes escalas espaciais, como também, definir o perfil do campo térmico em distintas texturas. Além disso, foi possível comparar, em imagens, a melhoria da resolução espacial do canal infravermelho termal Landsat-8 em relação ao Landsat-5. Tal metodologia possibilita a aplicação em outros intervalos de datas e locais distintos, contribuindo nas pesquisas e no auxílio detomadas de decisões.

  13. Landsat-8 Sensor Characterization and Calibration

    Directory of Open Access Journals (Sweden)

    Brian Markham

    2015-02-01

    Full Text Available Landsat-8 was launched on 11 February 2013 with two new Earth Imaging sensors to provide a continued data record with the previous Landsats. For Landsat-8, pushbroom technology was adopted, and the reflective bands and thermal bands were split into two instruments. The Operational Land Imager (OLI is the reflective band sensor and the Thermal Infrared Sensor (TIRS, the thermal. In addition to these fundamental changes, bands were added, spectral bandpasses were refined, dynamic range and data quantization were improved, and numerous other enhancements were implemented. As in previous Landsat missions, the National Aeronautics and Space Administration (NASA and United States Geological Survey (USGS cooperated in the development, launch and operation of the Landsat-8 mission. One key aspect of this cooperation was in the characterization and calibration of the instruments and their data. This Special Issue documents the efforts of the joint USGS and NASA calibration team and affiliates to characterize the new sensors and their data for the benefit of the scientific and application users of the Landsat archive. A key scientific use of Landsat data is to assess changes in the land-use and land cover of the Earth’s surface over the now 43-year record. [...

  14. Claro e confuso: a mistura de imagens no cinema

    Directory of Open Access Journals (Sweden)

    Jacques Aumont

    2008-11-01

    Full Text Available No cinema, a mistura de imagens é um procedimento narrativo que pode ser obtido a partir da superposição de dois ou mais planos filmados. Este recurso vem sendo utilizado desde a fase do cinema mudo até os cineastas de vanguarda; pode ser facilmente observado tanto em filmes hollywoodianos quanto experimentais. Ao superpor imagens num mesmo quadro, o cinema nos obriga a pensar no estatuto e na "lógica" da imagem em movimento, estimulando-nos a entender, em última instância, o próprio processo de percepção e de constituição do sentido a partir de sua articulação no interior do plano ou entre planos. É da problemática da instauração e da apreensão perceptual e conceitual dessas imagens "misturadas" que este artigo se ocupa, valendo-se das relações possí­veis entre cinema, pintura e fotografia. Palavras-chave cinema, imagem, mistura, percepção, sentido Abstract In cinema, the dissolving of one image into another is a narrative procedure that is obtained through the juxtaposition of two or more shots. This resource has been utilized ever since the silent film era through to the vanguard filmmakers. It is present as much in Hollywood blockbusters as in experimental films. In superimposing images within a single frame, the cinema obliges us to in perceive the logic of the images in movement, leading us eventually to understand the actual process of perception and constitution of meaning through its articulation either within a single shot or between shots. This article is concerned with the issue of establishing these blended images and their perceptual, conceptual comprehension, exploring the possible relations between cinema, painting and phothograpy. Key words cinema, image, dissolve, perception, meaning

  15. Landsat Science Team: 2017 Winter Meeting Summary

    Science.gov (United States)

    Schroeder, Todd A.; Loveland, Thomas; Wulder, Michael A.; Irons, James R.

    2017-01-01

    The summer meeting of the joint U.S. Geological Survey (USGS)-NASA Landsat Science Team (LST) was held July 26-28, 2016, at South Dakota State University (SDSU) in Brookings, SD. LST co-chair Tom Loveland [USGS’s Earth Resources Observation and Science Center (EROS)] and Kevin Kephart [SDSU] welcomed more than 80 participants to the three-day meeting. That attendance at such meetings continues to increase—likely due to the development of new data products and sensor systems—further highlights the growing interest in the Landsat program. The main objectives of this meeting were to provide a status update on Landsat 7 and 8, review team member research activities, and to begin identifying priorities for future Landsat missions.

  16. La publicidad y el enfoque de la imagen femenina

    OpenAIRE

    Sánchez-Aranda, J.J. (José Javier)

    2003-01-01

    Desde hace años se ha reivindicado la necesidad de que la publicidad presente una imagen de la mujer más adecuada a la realidad presente. A partir de la Teoría del Enfoque se pueden esclarecer algunos conceptos fundamentales que ayuden a resolver algunas de los problemas planteados con esas protestas. Tras presentar los puntos más controvertidos que suelen destacarse y aplicar la Teoría del Enfoque al ámbito específico de la publicidad, se intenta delimitar los aspectos centrales de la polémi...

  17. RANCIÈRE: A POLÍTICA DAS IMAGENS

    Directory of Open Access Journals (Sweden)

    Pedro Hussak van Velthen Ramos

    2015-07-01

    Full Text Available Este artigo mostra os desdobramentos das reflexões deJacques Rancière em torno da relação entre política e estética nodomínio específico da imagem. Trata-se de mostrar em que sentidoas imagens se articulam politicamente em sua circulação social. Nasduas primeiras partes, expõe-se a crítica de Rancière a dois modosde se colocar a relação entre imagem e política: por um lado, a ideiade que a própria imagem seria nociva à política; por outro, aconsideração de que o elemento político da imagem estaria noconteúdo que ela apresenta. Por fim, pretende-se mostrar que, parao pensador francês, a politicidade das imagens deve ser encontradaem um regime determinado de articulações de seus elementos efunções que ele chama de “regime de imagéité”. Como conclusão,serão discutidas as consequências da passagem de um regime aoutro, a saber, do regime representativo ao regime estético.

  18. Landsat and water: case studies of the uses and benefits of landsat imagery in water resources

    Science.gov (United States)

    Serbina, Larisa O.; Miller, Holly M.

    2014-01-01

    The Landsat program has been collecting and archiving moderate resolution earth imagery since 1972. The number of Landsat users and uses has increased exponentially since the enactment of a free and open data policy in 2008, which made data available free of charge to all users. Benefits from the information Landsat data provides vary from improving environmental quality to protecting public health and safety and informing decision makers such as consumers and producers, government officials and the public at large. Although some studies have been conducted, little is known about the total benefit provided by open access Landsat imagery. This report contains a set of case studies focused on the uses and benefits of Landsat imagery. The purpose of these is to shed more light on the benefits accrued from Landsat imagery and to gain a better understanding of the program’s value. The case studies tell a story of how Landsat imagery is used and what its value is to different private and public entities. Most of the case studies focus on the use of Landsat in water resource management, although some other content areas are included.

  19. Requirements, Science, and Measurements for Landsat 10 and Beyond: Perspectives from the Landsat Science Team

    Science.gov (United States)

    Crawford, C. J.; Masek, J. G.; Roy, D. P.; Woodcock, C. E.; Wulder, M. A.

    2017-12-01

    The U.S. Geological Survey (USGS) and NASA are currently prioritizing requirements and investing in technology options for a "Landsat 10 and beyond" mission concept as part of the Sustainable Land Imaging (SLI) architecture. Following the successful February 2013 launch of the Landsat 8, the Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) have now added over 1 million images to the USGS Landsat archive. The USGS and NASA support and co-lead a Landsat Science Team made up largely of university and government experts to offer independent insight and guidance of program activities and directions. The rapid development of Landsat 9 reflects, in part, strong input from the 2012-2017 USGS Landsat Science Team (LST). During the last two years of the LST's tenure, individual LST members and within LST team working groups have made significant contributions to Landsat 10 and beyond's science traceability and future requirements justification. Central to this input, has been an effort to identify a trade space for enhanced measurement capabilities that maintains mission continuity with eight prior multispectral instruments, and will extend the Landsat Earth observation record beyond 55+ years with an approximate launch date of 2027. The trade space is framed by four fundamental principles in remote sensing theory and practice: (1) temporal resolution, (2) spatial resolution, (3) radiometric resolution, and (4) spectral coverage and resolution. The goal of this communication is to provide a synopsis of past and present 2012-2017 LST contributions to Landsat 10 and beyond measurement science and application priorities. A particular focus will be to document the links between new science and societal benefit areas with potential technical enhancements to the Landsat mission.

  20. Imagens do outro na filosofia: o desafio da diferença

    Directory of Open Access Journals (Sweden)

    Sílvio Gallo

    2012-06-01

    Full Text Available Este artigo tem por objetivo problematizar a tematização do outro pela Filosofia. Dialogando com imagens do cinema e da televisão, procura identificar quais as imagens ou os conceitos do outro, produzidos na história da Filosofia. De forma esquemática, apresenta as imagens do outro como bárbaro (Aristóteles; exótico (Montaigne; civilizado (Voltaire; inferno (Sartre, para, ao final, ensaiar uma "não-imagem" do outro como diferença radical, proposta pela filosofia da diferença de Deleuze.

  1. Landsat 1-5 Multispectral Scanner V1

    Data.gov (United States)

    National Aeronautics and Space Administration — Abstract: The Landsat Multispectral Scanner (MSS) was a sensor onboard Landsats 1 through 5 and acquired images of the Earth nearly continuously from July 1972 to...

  2. Imagens que pensam, que sonham, que sentem. Uma proposta ousada?

    Directory of Open Access Journals (Sweden)

    Adriana Baggio

    2013-06-01

    Full Text Available As imagens podem pensar, de maneira independente, como se fossem sujeitos? Para apresentar e discutir essa ideia, Etienne Samain reuniu textos próprios e de mais nove autores. Inspirados pelos conceitos de Aby Warburg, Gregory Bateson e Didi-Huberman, os artigos tratam de uma teoria da imagem e sua operação metodológica e analítica, especialmente em relação à fotografia. Os textos estão organizados em três partes e se complementam, dialogam e até mesmo se opõem, formando um panorama rico e consistente de outra proposta epistemológica da comunicação.

  3. Landsat science team meeting: Summer 2015

    Science.gov (United States)

    Schroeder, Todd; Loveland, Thomas; Wulder, Michael A.; Irons, James R.

    2015-01-01

    The summer meeting of the joint U.S. Geological Survey (USGS)–NASA Landsat Science Team (LST) was held at the USGS’s Earth Resources Observation and Science (EROS) Center July 7-9, 2015, in Sioux Falls, SD. The LST co-chairs, Tom Loveland [EROS—Senior Scientist] and Jim Irons [NASA’s Goddard Space Flight Center (GSFC)—Landsat 8 Project Scientist], opened the three-day meeting on an upbeat note following the recent successful launch of the European Space Agency’s Sentinel-2 mission on June 23, 2015 (see image on page 14), and the news that work on Landsat 9 has begun, with a projected launch date of 2023.

  4. 2017 Landsat Science Team Summer Meeting Summary

    Science.gov (United States)

    Crawford, Christopher J.; Loveland, Thomas R.; Wulder, Michael A.; Irons, James R.

    2018-01-01

    The summer meeting of the U.S. Geological Survey (USGS)-NASA Landsat Science Team (LST) was held June 11-13, 2017, at the USGS’s Earth Resources Observation and Science (EROS) Center near Sioux Falls, SD. This was the final meeting of the Second (2012-2017) LST.1 Frank Kelly [EROS—Center Director] welcomed the attendees and expressed his thanks to the LST members for their contributions. He then introduced video-recorded messages from South Dakota’s U.S. senators, John Thune and Mike Rounds, in which they acknowledged the efforts of the team in advancing the societal impacts of the Landsat Program.

  5. Landsat 7 - A challenge to America

    Science.gov (United States)

    Colvocoresses, Alden P.

    Factors in favor of Landsat 7 are discussed; they include: reasonable cost, a base on which to examine global change, and the need for comprehensive and continuous satellite coverage of the earth at moderate (5-30 m) resolution, in view of various occurrences on the earth's surface, ranging from the Chernobyl disaster to deforestation to the Persian Gulf conflict. Attention is given to proposed parameters for Landsat 7 and suggested actions that should be taken by Congress, the Administration, and the public to implement this space program.

  6. La Responsabilidad Social Corporativa: una estrategia para conseguir imagen y reputación

    Directory of Open Access Journals (Sweden)

    María Luisa García Guardia

    2012-04-01

    Full Text Available Este artículo surge a partir del interés que nos ha suscitado el desarrollo de la Responsabilidad Social Corporativa (RSC, en las empresas, como una estrategia para la consecución de una imagen positiva y estable. En el desarrollo de mencionado análisis, nos hemos centrado en la multinacional Coca-Cola, ya que esta empresa se ha constituido como referente internacional en términos de imagen corporativa.

  7. Chesapeake Bay plume dynamics from LANDSAT

    Science.gov (United States)

    Munday, J. C., Jr.; Fedosh, M. S.

    1981-01-01

    LANDSAT images with enhancement and density slicing show that the Chesapeake Bay plume usually frequents the Virginia coast south of the Bay mouth. Southwestern (compared to northern) winds spread the plume easterly over a large area. Ebb tide images (compared to flood tide images) show a more dispersed plume. Flooding waters produce high turbidity levels over the shallow northern portion of the Bay mouth.

  8. Landsat-D thematic mapper simulator

    Science.gov (United States)

    Flanagan, G. F.; Tilton, E. L., III

    The design and testing program for the airborne Landsat-D thematic-mapper simulator (TMS) is summarized. The TMS is intended to provide data similar enough to those expected from Landsat-D to facilitate the development of data-processing software. The design process comprised mainly modifications on the existing MSS-simulator fiber optics, dichroics, and detectors to provide 7-channel coverage of the 0.45-12.3-micron range at 60-deg angle of view, corresponding to a 418-element, 13.8-km-wide ground swath. The TMS is carried on a Lear 23 aircraft operating at 750 km/h and 12-m altitude and equipped with a 15.2-cm aerial mapping camera and a ground-updated inertial navigational system. Agricultural, forestry, and geological trial applications are reviewed, and some sample results are given. The significant improvements predicted for the Landsat-D thematic mapper (relative to the Landsat MSS) are seen as confirmed, with the possible exception of the 120-m-resolution version of channel 7.

  9. Continuous Calibration Improvement in Solar Reflective Bands: Landsat 5 Through Landsat 8

    Science.gov (United States)

    Mishra, Nischal; Helder, Dennis; Barsi, Julia; Markham, Brian

    2016-01-01

    Launched in February 2013, the Operational Land Imager (OLI) on-board Landsat 8 continues to perform exceedingly well and provides high science quality data globally. Several design enhancements have been made in the OLI instrument relative to prior Landsat instruments: pushbroom imaging which provides substantially improved Signal-to-Noise Ratio (SNR), spectral bandpasses refinement to avoid atmospheric absorption features, 12 bit data resolution to provide a larger dynamic range that limits the saturation level, a set of well-designed onboard calibrators to monitor the stability of the sensor. Some of these changes such as refinements in spectral bandpasses compared to earlier Landsats and well-designed on-board calibrator have a direct impact on the improved radiometric calibration performance of the instrument from both the stability of the response and the ability to track the changes. The on-board calibrator lamps and diffusers indicate that the instrument drift is generally less than 0.1% per year across the bands. The refined bandpasses of the OLI indicate that temporal uncertainty of better than 0.5% is possible when the instrument is trended over vicarious targets such as Pseudo Invariant Calibration Sites (PICS), a level of precision that was never achieved with the earlier Landsat instruments. The stability measurements indicated by on-board calibrators and PICS agree much better compared to the earlier Landsats, which is very encouraging and bodes well for the future Landsat missions too.

  10. Perspective View with Landsat Overlay, Costa Rica

    Science.gov (United States)

    2002-01-01

    This perspective view shows the Caribbean coastal plain of Costa Rica, with the Cordillera Central rising in the background and the Pacific Ocean in the distance. The prominent river in the center of the image is the Rio Sucio, which merges with the Rio Sarapiqui at the bottom of the image and eventually joins with Rio San Juan on the Nicaragua border.Like much of Central America, Costa Rica is generally cloud covered so very little satellite imagery is available. The ability of the Shuttle Radar Topography Mission (SRTM) instrument to penetrate clouds and make three-dimensional measurements will allow generation of the first complete high-resolution topographic map of the entire region. These data were used to generate the image.This three-dimensional perspective view was generated using elevation data from SRTM and an enhanced false-color Landsat 7 satellite image. Colors are from Landsat bands 5, 4, and 2 as red, green and blue, respectively. Topographic expression is exaggerated two times.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter resolution of most Landsat images and will substantially help in analyses of the large and growing Landsat image archive. The Landsat 7 Thematic Mapper image used here was provided to the SRTM by the United States Geological Survey, Earth Resources Observation Systems (EROS) Data Center, Sioux Falls, S.D.Elevation data used in this image was acquired by the SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices

  11. River morphodynamics from space: the Landsat frontier

    Science.gov (United States)

    Schwenk, Jon; Khandelwal, Ankush; Fratkin, Mulu; Kumar, Vipin; Foufoula-Georgiou, Efi

    2017-04-01

    NASA's Landsat family of satellites have been observing the entire globe since 1984, providing over 30 years of snapshots with an 18 day frequency and 30 meter resolution. These publicly-available Landsat data are particularly exciting to researchers interested in river morphodynamics, who are often limited to use of historical maps, aerial photography, and field surveys with poor and irregular time resolutions and limited spatial extents. Landsat archives show potential for overcoming these limitations, but techniques and tools for accurately and efficiently mining the vault of scenes must first be developed. In this PICO presentation, we detail the problems we encountered while mapping and quantifying planform dynamics of over 1,300 km of the actively-migrating, meandering Ucayali River in Peru from Landsat imagery. We also present methods to overcome these obstacles and introduce the Matlab-based RivMAP (River Morphodynamics from Analysis of Planforms) toolbox that we developed to extract banklines and centerlines, compute widths, curvatures, and angles, identify cutoffs, and quantify planform changes via centerline migration and erosion/accretion over large spatial domains with high temporal resolution. Measurement uncertainties were estimated by analyzing immobile, abandoned oxbow lakes. Our results identify hotspots of planform changes, and combined with limited precipitation, stage, and topography data, we parse three simultaneous controls on river migration: climate, sediment, and meander cutoff. Overall, this study demonstrates the vast potential locked within Landsat archives to identify multi-scale controls on river migration, observe the co-evolution of width, curvature, discharge, and migration, and discover and develop new geomorphic insights.

  12. Imagen, virtualidad y heterotopía. Reflexiones acerca de la imagen y su función heterotópica

    Directory of Open Access Journals (Sweden)

    Juan Diego Parra Valencia

    2017-06-01

    Full Text Available El presente artículo aborda la noción de imagen, como campo problemático, más allá del régimen semiológico instaurado desde los modelos lingüísticos. En general, la noción de imagen ha estado vinculada solo a la idea de “representación”, desde la cual se logró domesticar su potencial instaurador de estados de sensibilidad. Consideramos pertinente ampliar campos de reflexión sobre aspectos que no se restrinjan a su funcionalidad representacional y para ello, nos apoyaremos en el concepto de heterotopía de Michel Foucault, el cual nos servirá de ayuda, por cuanto expande el campo de reflexión estética y permite integrar a la dimensión simbólica, la función virtualizante de la imagen como productora de estados de sensibilidad. La imagen, a nuestro entender, funciona como una heterotopía, es una tipología espacio-temporal no convencional, y por tanto es estructurante y configuradora de realidad, tanto en términos sensibles como inteligibles.

  13. Tiempo e imagen en Gaston Bachelard y Herni Bergson

    Directory of Open Access Journals (Sweden)

    Juan de Dios Martínez Lozornio

    2016-01-01

    Full Text Available Este artículo busca un acercamiento a la cuestión del tiempo de la creación. Las reflexiones estéticas de Gastón Bachelard ponen énfasis en dicho aspecto, sin embargo, hace referencia constantemente –en contraposición– a la duración de Henri Bergson, desarrollando así una dialéctica intuicional en la que la duración se enfrenta al instante. El lugar en el que se da esta lucha de intuiciones es la imagen, pues en ésta se manifiesta la temporalidad esencial de la creación artística según Bachelard. This article seeks an approach to the question of the time of creation. The aesthetic reflections of Gaston Bachelard put emphasis on this aspect, however, constant reference –as opposed– to the duration of Henri Bergson, thus developing an intuitional dialectic in which the duration is faced to the instant. The place where takes place this struggle of intuitions is the image, because there, following Bachelard, the essential temporality of the artistic creation manifests itself.

  14. Bloggers y su influencia en la imagen de una marca

    Directory of Open Access Journals (Sweden)

    Mª Luisa García Guardia

    2012-04-01

    Full Text Available En el corazón de los debates y las prácticas actuales se encuentra la hipótesis sobre la comunicación a dos niveles: los líderes de opinión y los denominados seguidores. En el ámbito de la comunicación persuasiva se acepta la importancia de este tipo de comunicación dual a la hora de evaluar los efectos sobre la toma de decisiones de los consumidores. Los denominados bloggers se han convertido en una herramienta de nueva de comunicación digna de ser estudiada, dada la relevancia adquirida en el ámbito de la comunicación en general, y más concretamente, su poder para construir o modificar la imagen de marca y las interacciones en el área empresarial. Para ello es preciso observar los caracteres metafísicos de nuestras metapsicologías y mantener una actitud de deconstrucción permanente, de modo de no intentar resolver los renovados problemas que nos imponen las prácticas sociales de hoy, con las preguntas de ayer como herramientas (Schroeder, D. 2004 El riesgo es realizar entonces lecturas solamente desde lo que ya sabemos.

  15. Imagens da cidade: memória coletiva em Londrina

    Directory of Open Access Journals (Sweden)

    Ana Cleide Chiarotti Cesário

    2004-12-01

    Full Text Available O presente artigo, além de apresentar as experiências de um projeto de pesquisa e extensão, desenvolvido por um grupo interdisciplinar de docentes e acadêmicos da Universidade Estadual de Londrina das diferentes áreas do conhecimento (Antropologia, Arquitetura, Ciência Política, História e Sociologia, discute aspectos teóricos-metodológicos importantes que envolvem as ações de política cultural, bem como os trabalhos com o Patrimônio Cultural na região norte paranaense, especialmente, na cidade de Londrina. Nesse sentido, emergem discussões importantes acerca de categorias teóricas como cultura, patrimônio, preservação, memória, representações, imaginário, identidade, aliadas à investigação de campo e à utilização de procedimentos metodológicos, que contemplam tanto o estudo do cotidiano quanto a utilização da história oral, e que estão sendo, atualmente, objetos de novas reflexões, a exemplo do Projeto de Pesquisa: "Londrina - imagens da cidade", desenvolvido pelas autoras deste trabalho.

  16. La imagen alfonsina del Palacio Real de Madrid

    Directory of Open Access Journals (Sweden)

    José Luis Sancho

    1990-01-01

    Full Text Available A finales del siglo XIX el Palacio Real de Madrid sufrió una reforma que supuso un cambio importante en el aspecto interior de esta residencia real. En 1879 y con el segundo matrimonio de Alfonso XII como causa inmediata, la decoración se puso al servicio de una escenografía monárquica bastante diferente a la isabelina. Los cambios no fueron en absoluto puntuales, sino que respondieron a una campaña global y pensada de una vez, cuyas cabezas más destacadas fueron el arquitecto mayor de Palacio, José Segundo de Lema, y el conde de Valencia de Don Juan como asesor histórico-artístico, y que estaba en perfecto acuerdo con el momento político y el gusto de su momento. La restauración alfonsina, ya consolidada, exigía una imagen oficial de la monarquía en la cual el lujo inherente a la representación no podía quedar encerrado en perpetuar la pompa dieciochesca, según había señalado un publicista tan notable como Galdós.

  17. Landsat: A global land-imaging mission

    Science.gov (United States)

    ,

    2012-01-01

    Across four decades since 1972, Landsat satellites have continuously acquired space-based images of the Earth's land surface, coastal shallows, and coral reefs. The Landsat Program, a joint effort of the U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA), was established to routinely gather land imagery from space. NASA develops remote-sensing instruments and spacecraft, then launches and validates the performance of the instruments and satellites. The USGS then assumes ownership and operation of the satellites, in addition to managing all ground reception, data archiving, product generation, and distribution. The result of this program is a long-term record of natural and human induced changes on the global landscape.

  18. Anaglyph, Landsat Overlay: Wellington, New Zealand

    Science.gov (United States)

    2000-01-01

    Wellington, the capital city of New Zealand, is located on the shores of Port Nicholson, a natural harbor at the south end of North Island. The city was founded in 1840 by British emigrants and now has a regional population of more than 400,000 residents. As seen here, the natural terrain imposes strong control over the urban growth pattern. Rugged hills generally rising to 300 meters (1,000 feet) help protect the city and harbor from strong winter winds.New Zealand is seismically active and faults are readily seen in the topography. The Wellington Fault forms the straight northwestern (upper left) shoreline of the harbor. Toward the southwest (lower left) the fault crosses through the city, then forms linear canyons in the hills before continuing offshore. Toward the northeast (upper right) the fault forms the sharp mountain front along the northern edge of the heavily populated Hutt Valley.This anaglyph was generated by first draping a Landsat Thematic Mapper image over a topographic map from the Shuttle Radar Topography Mission, then using the topographic data to create two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.Landsat satellites have provided visible light and infrared images of the Earth continuously since 1972. SRTM topographic data match the 30 meter (99 foot) spatial resolution of most Landsat images and will provide a valuable complement for studying the historic and growing Landsat data archive. The Landsat 7 Thematic Mapper image used here was provided to the SRTM project by the United States Geological Survey, Earth Resources Observation Systems (EROS) data Center, Sioux Falls, South Dakota.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour

  19. Tapices y crónica, imagen y texto: un entramado persuasivo al servicio de la imagen de Carlos V

    Directory of Open Access Journals (Sweden)

    Antonio Gozalbo

    2016-12-01

    Full Text Available Las consecuencias artísticas de la conquista de Túnez por Carlos V (1535 resultaron fundamentales para la articulación plena de su imagen de poder. Dentro de este amplio conjunto de manifestaciones plásticas y literarias destaca la monumental serie de tapices de «La Jornada de Túnez». Con el presente artículo queremos aportar mayor claridad a la tesis que otorga la autoría intelectual del conjunto al cronista Alonso de Santa Cruz, mostrando los evidentes vínculos entre los paños y su Crónica del Emperador Carlos V. Así pues, tapices y crónica con uyeron generando un potente entramado icónico-literario destinado a la miti cación de Carlos V. The artistic consequences of the conquest of Tunis by Charles V (1535 were essential in the full articulation of its image of power. Within this broad set of visual and literary artistic expressions the monumental series of tapestries of «la Jornada de Túnez» are highlighted. In this article we want to throw light upon the thesis of intellectual authorship of the whole work attributed to the chronicler Alonso de Santa Cruz, showing the obvious links between tapestries and his Chronicle of Emperor Charles V. us, tapestries and chronicle converged generating a powerful iconic literary framework intended to mythicize Charles V.

  20. La imagen periodística no fotográfica (1. La imagen en el periodismo

    Directory of Open Access Journals (Sweden)

    Dr. Carlos Abreu Sojo

    2000-01-01

    Full Text Available Desde su aparición, la fotografía periodística capitalizó las preferencias de periodistas y editores como vehículo fundamental de estética de las páginas de diarios, revistas y demás publicaciones de actualidad. No obstante, otras formas tradicionales como el dibujo y la caricatura no han perdido su espacio en la prensa. Por el contrario, en los últimos años han tomado un "segundo aire" y su empleo -muchas veces bajo el rótulo de "ilustración"-, al igual que el de la infografía, forma parte consustancial del periodismo moderno. En una serie de trabajos que comienza a partir de la próxima entrega el doctor Carlos Abreu examina acuciosamente cada una de esas modalidades. Empero, antes -en esta edición- nos explica las características de la imagen en el periodismo, trabajo que sirve de preámbulo para los próximos artículos.

  1. Tratamiento de la imagen corporal en los trastornos alimentarios y cambio clínicamente significativo

    Directory of Open Access Journals (Sweden)

    José H. Marco

    2014-05-01

    Full Text Available Las alteraciones de la imagen corporal son un factor mantenedor y de pronóstico en los trastornos alimentarios. Los tratamientos actuales para los trastornos alimentarios se podrían beneficiar de la intervención directa sobre la imagen corporal. En el siguiente trabajo se realiza un estudio controlado en el que se comprara la Terapia Cognitivo Conductual para los trastornos alimentarios con y sin un componente para el tratamiento de la imagen corporal apoyado con técnicas de realidad virtual. El objetivo de este trabajo fue comprobar si ambos tipos de tratamiento producen un cambio clínicamente significativo al finalizar el tratamiento y en el seguimiento al año en la imagen corporal, en la psicopatología especifica de los trastornos alimentarios y en la psicopatología general. Para ello evaluamos y tratamos a 34 participantes diagnosticadas de trastorno alimentario y comparamos sus resultados con un grupo de mujeres de población general con baja vulnerabilidad a los trastornos alimentarios. Los resultados indican que después del tratamiento se ha producido un cambio fiable y clínicamente significativo únicamente en la condición en la que se ha intervenido en la imagen corporal. Las implicaciones de este resultado y sus limitaciones son comentadas.

  2. Evapotranspiração e coeficiente de cultura do algodoeiro irrigado a partir de imagens de sensores orbitais Cotton evapotranspiration and crop coefficient obtained by satellite images

    Directory of Open Access Journals (Sweden)

    Marcus Vinícius Cândido Bezerra

    2012-03-01

    Full Text Available O presente estudo teve como objetivos estimar a evapotranspiração - ETc e determinar a curva do coeficiente de cultura - Kc do algodoeiro irrigado através do Surface Energy Balance Algorithm for Land - SEBAL com imagens orbitais TM - Landsat 5. Foram utilizadas oito imagens distribuídas ao longo do ciclo fenológico do algodoeiro cultivado na Fazenda Busato localiza no município de Bom Jesus da Lapa, região do Médio São Francisco, Estado da Bahia (13°15'18''S, 43°25'05''W, 436 m. A classificação climática da região segundo Köppen é BSwh'. O saldo de radiação foi calculado a partir de imagens da temperatura, emissividade da superfície, índices de vegetação, albedo e calculados os fluxos de calor no solo e sensível para obter-se o fluxo de calor latente e a ETc. Verificou-se que o índice de vegetação NDVI apresentou evolução concomitante com o ciclo da cultura, com valores máximos (0,80 aos 70 dias após semeadura - DAS. A ETc e o Kc obtidos foram, respectivamente: 1,0 a 5,0 mm dia-1 e 0,65 no período de desenvolvimento (7 e 70 DAS; > 6 mm dia-1 e 1,18 durante a floração e formação dos capulhos e 2 mm dia-1 e 0,66 no fim do ciclo. Os resultados mostram que o NDVI é um bom indicador do desenvolvimento do algodoeiro e os dados de ETc e Kc estão coerentes com relatos na literatura.This research aimed determine cotton evapotranspiration - ETc and crop coefficient - Kc slope using the Surface Energy balance Algorithm for Land - SEBAL with TM-Landsat 5 images. We used eight images distributed throughout the cotton growth season on the Busato Farm located in Bom Jesus da Lapa, Médio São Francisco region, Bahia state (13°15'18" S, 43°25'05" W, 436 m. The Climate classification of region by Köppen is BSwh'. The net radiation was calculated from surface temperature, surface emissivity, vegetation index and albedo imagesn and calculated soil and sensible heats fluxes to obtain the latent heat flux and ETc. The NDVI

  3. Small forest cuttings mapped with Landsat digital data

    Science.gov (United States)

    Bryant, E.; Dodge, A. G.; Eger, M. J. E.

    1979-01-01

    The Cooperative Landsat Applications Research Group used computer classification of Landsat digital data to map forest cuttings (clearcuts) in northern New Hampshire. Cuttings as small as 3 hectares were identified. Several ages or conditions of clearcuts could be distinguished. Progress in two methods of duplicating classification categories from one Landsat pass to another are discussed. One method was used in making maps of areas in 1973, 1975, and 1978.

  4. Images generated by ultra-sound; Imagenes generadas por ultrasonido

    Energy Technology Data Exchange (ETDEWEB)

    Godinez, Valery Francisco; Marcial, Miguel Angel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-01-01

    inspeccion requirio del analisis de imagenes ultrasonicas de las soldaduras de dos muestras de bastones; dichas imagenes se generaron mediante un barrido ultrasonico tipo C (C-scan) usando un sistema integrado en el Laboratorio de Pruebas no Destructivas de la Unidad de Sistemas de Combustion del Instituto de Investigaciones Electricas (IIE). El analisis permitio establecer la configuracion adecuada del equipo a utilizar en la inspeccion en sitio, los procedimientos de calibracion del mismo y los criterios de aceptacion/rechazo de las soldaduras a inspeccionar. Asimismo, se presenta una correlacion entre los valores de los coeficientes de reflexion ultrasonicos medidos en las soldaduras y los valores teoricos para la adherencia en la interfaz solido-solido predichos por un modelo simple de interfaz imperfecta. Estos resultados son un primer paso en la caracterizacion cuantitativa de uniones solido-solido, que aunado a futuros desarrollos tendria un impacto tecnologico inmediato en la determinacion del estado de soldaduras por friccion, soldaduras con aporte de metal fundido y grado de adherencia de recubrimientos sobre estructuras expuestas a condiciones que inducen corrosion.

  5. LEDAPS Landsat Calibration, Reflectance, Atmospheric Correction Preprocessing Code

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) is a NASA project to map disturbance, regrowth, and permanent forest conversion...

  6. The impact of landsat satellite monitoring on conservation biology.

    Science.gov (United States)

    Leimgruber, Peter; Christen, Catherine A; Laborderie, Alison

    2005-07-01

    Landsat 7's recent malfunctioning will result in significant gaps in long-term satellite monitoring of Earth, affecting not only the research of the Earth science community but also conservation users of these data. To determine whether or how important Landsat monitoring is for conservation and natural resource management, we reviewed the Landsat program's history with special emphasis on the development of user groups. We also conducted a bibliographic search to determine the extent to which conservation research has been based on Landsat data. Conservation biologists were not an early user group of Landsat data because a) biologists lacked technical capacity--computers and software--to analyze these data; b) Landsat's 1980s commercialization rendered images too costly for biologists' budgets; and c) the broad-scale disciplines of conservation biology and landscape ecology did not develop until the mid-to-late 1980s. All these conditions had changed by the 1990s and Landsat imagery became an important tool for conservation biology. Satellite monitoring and Landsat continuity are mandated by the Land Remote Sensing Act of 1992. This legislation leaves open commercial options. However, past experiments with commercial operations were neither viable nor economical, and severely reduced the quality of monitoring, archiving and data access for academia and the public. Future satellite monitoring programs are essential for conservation and natural resource management, must provide continuity with Landsat, and should be government operated.

  7. A Cubesat enabled Spatio-Temporal Enhancement Method (CESTEM) utilizing Planet, Landsat and MODIS data

    KAUST Repository

    Houborg, Rasmus; McCabe, Matthew

    2018-01-01

    using a multi-scale target sampling scheme that draws Landsat 8 reference data from a series of scenes by using MODIS-consistent surface reflectance time series to quantify relative changes in Landsat-scale reflectances over given Landsat

  8. La Imagen Corporativa: Creación de ventajas competitivas a través de estrategias sociales

    Directory of Open Access Journals (Sweden)

    María Isabel Corvera Valenzuela

    2016-02-01

    Full Text Available El trabajo muestra la importancia de la imagen corporativa como elemento de la comunicación de la empresa hacia el mercado y la sociedad. Se destacan diferentes estrategias que las empresas emplean para proyectar su imagen hacia el exterior de la misma.

  9. La formación de la imagen turística inducida: un modelo conceptual

    Directory of Open Access Journals (Sweden)

    Raquel Camprubí

    2009-01-01

    más influyentes para la competitividad de los destinos turísticos, el principal objetivo de este artículo es construir un marco conceptual que muestre la influencia de la red relacional del destino en su imagen emitida. En este contexto, se asume que la imagen turística es una construcción social resultante de la interacción de los distintos agentes que intervienen en el destino turístico (administraciones públicas, instituciones locales, empresas turísticas, etc.; y se propone un modelo teórico para mostrar los efectos de la red relacional del destino turístico en la calidad de la imagen turística creada en términos de conocimiento generado y, por tanto, en su competitividad.

  10. Comunicación, imagen social y visibilidad de los Cuidados de Enfermería.

    Directory of Open Access Journals (Sweden)

    Fernández Salazar, Serafín

    2013-01-01

    Full Text Available En la actualidad, la imagen social del colectivo enfermero sigue estando encorsetada en demasiados estereotipos. Habitualmente, los medios de comunicación suelen hacerse eco de las grandes investigaciones, de los avances tecnológicos, de la robotización o de los nuevos hospitales, pero lo básico y lo sencillo no vende. Una adecuada y planificada comunicación de lo que hace las enfermeras podría aumentar la visibilidad de los cuidados.La realización de iniciativas colaborativas a través de Internet y Redes Sociales puede ayudarnos a mejorar la imagen social del colectivo enfermero, pero no es suficiente. La investigación, la orientación a resultados, la comunicación adecuada con los ciudadanos y la responsabilidad de cada uno de los profesionales son esenciales para mostrar una imagen más clara del cuidado enfermero.

  11. Imagen, violencia política y formación

    Directory of Open Access Journals (Sweden)

    Vladimir Olaya Gualteros

    2015-02-01

    Full Text Available A través de una serie de obras artísticas de Patricia Bravo: “huella y memoria” y “mata que Dios perdona” puestas en escena en algunos espacios públicos de Medellín, los autores construyen relaciones enunciativas en las que conectan imagen con subjetividad, imagen con política e imagen con memoria. Derivar de estas relaciones efectos formativos supone advertir nuevos modos para la comprensión histórica de la violencia social y política, al tiempo que se insinúan potencias propias del arte particularmente útiles tanto para el testimonio como para la afección.

  12. Uma abordagem evolutiva para recuperação de imagens da web

    OpenAIRE

    Katia Cristina Lage dos Santos

    2009-01-01

    Os avanços no armazenamento de dados e nas tecnologias para aquisição de imagens tornaram possível a criação de grandes bases ou coleções de imagens. Além disso, o enorme sucesso da Web tem proporcionado baixo custo e acessibilidade em larga escala deste material. Aliado a esses fatores, uma variedade de atividades lucrativas demandam transferência de informação baseada em imagem. Exemplos típicos são projetos arquitetônicos, desenhos de engenharia e de moda, perfumes, novos carros, campanhas...

  13. Incertidumbre, calidad de vida e imagen corporal en mujeres sometidas a mastectomía

    OpenAIRE

    Mejía Rojas, María Elena

    2012-01-01

    Estudio analítico, observacional, no experimental, correlacional, que analizó la relación entre incertidumbre, calidad de vida e imagen corporal con los instrumentos; (incertidumbre frente a la enfermedad Mishel 1988, calidad de vida en mujeres sobrevivientes al cáncer QOL Betty Ferrell 1995, y escala de imagen corporal de Hopwood 1983), en 76 mujeres sobrevivientes al cáncer de mama sometidas a mastectomía; con cirugía reconstructiva (37) y sin cirugía reconstructiva (39), de Cali Colombia e...

  14. Generalidades de la imagen corporal y sus implicaciones en el deporte

    Directory of Open Access Journals (Sweden)

    Diego Fabricio Rodríguez Camacho

    2015-04-01

    Conclusiones. La imagen corporal es dinámica, se construye y modifica a lo largo de la vida a partir de estímulos sensoriales en términos de cuerpo y espacio, así como de estímulos socioculturales involucrados en la autoestima y el rendimiento deportivo. El desarrollo de programas de actividad físico-deportiva genera un impacto positivo sobre la imagen corporal en todas las edades, siempre y cuando se tengan presentes parámetros específicos de entrenamiento.

  15. Percepción y satisfacción de la imagen corporal en estudiantes universitarios

    OpenAIRE

    Garrido García, Javier

    2017-01-01

    la imagen corporal es la representación mental que cada persona tiene de su cuerpo, el modo en el que cada uno percibe, siente, imagina y actúa respecto a su cuerpo. Gran cantidad de estudiantes universitarios presentan algún tipo de distorsión o insatisfacción en la percepción de ésta. Objetivos: evaluar la percepción y la satisfacción de la imagen corporal en una muestra de estudiantes universitarios Grado en Nutrición Humana y Dietética

  16. Analisis de estereotipos e imagen femenina en la publicidad del desodorante Axe

    OpenAIRE

    Mera Taimal, Jefferson Arturo

    2012-01-01

    El análisis del discurso de la imagen femenina en las campañas publicitarias comprende un campo de estudio para la comunicación amplio e interesante, en el cual se trata de dilucidar el uso de la imagen y de estereotipos femeninos presentes y su uso como herramientas de comunicación para persuadir al consumidor. Los estereotipos como imaginarios son construcciones sociales que están presentes en toda sociedad y forman parte de la concepción que tienen los individuos de su entor...

  17. Imagen, artista y enfermedad en la creación plástica

    OpenAIRE

    Sánchez García, Nieves

    2013-01-01

    NOTA 520 8 La Tesis Doctoral, titulada “Imagen, artista y enfermedad en la creación plástica“, tiene como objetivo investigar y establecer la relación entre el arte, - como proceso creativo- y la enfermedad, entendida esta como un factor importante e, incluso, decisivo en la propia configuración de la imagen y de la personalidad del artista. Como punto de partida, se procede a analizar diacrónicamente y con profundidad el concepto de “la leyenda del artista” y la consideración social de la...

  18. Imagen y elementos no verbales en informaciones políticas televisivas

    Directory of Open Access Journals (Sweden)

    María Reyes Domínguez Lázaro

    2009-12-01

    Full Text Available Destaca la importancia de la imagen, del lenguaje y otros elementos no verbales que intervienen en la comunicación. De este modo no basta con el dominio exhaustivo de las palabras orales, sino de todas aquellas no manifiestas pero si evocadoras en la mente de los telespectadores. La sociedad del siglo XXI es la sociedad de la imagen, y como tal, debe ser considerada y tenida en cuenta en cualquier proceso comunicativo y, mucho más cuando se trata de la televisión.

  19. Generating Daily Synthetic Landsat Imagery by Combining Landsat and MODIS Data.

    Science.gov (United States)

    Wu, Mingquan; Huang, Wenjiang; Niu, Zheng; Wang, Changyao

    2015-09-18

    Owing to low temporal resolution and cloud interference, there is a shortage of high spatial resolution remote sensing data. To address this problem, this study introduces a modified spatial and temporal data fusion approach (MSTDFA) to generate daily synthetic Landsat imagery. This algorithm was designed to avoid the limitations of the conditional spatial temporal data fusion approach (STDFA) including the constant window for disaggregation and the sensor difference. An adaptive window size selection method is proposed in this study to select the best window size and moving steps for the disaggregation of coarse pixels. The linear regression method is used to remove the influence of differences in sensor systems using disaggregated mean coarse reflectance by testing and validation in two study areas located in Xinjiang Province, China. The results show that the MSTDFA algorithm can generate daily synthetic Landsat imagery with a high correlation coefficient (R) ranged from 0.646 to 0.986 between synthetic images and the actual observations. We further show that MSTDFA can be applied to 250 m 16-day MODIS MOD13Q1 products and the Landsat Normalized Different Vegetation Index (NDVI) data by generating a synthetic NDVI image highly similar to actual Landsat NDVI observation with a high R of 0.97.

  20. Perspective with Landsat Overlay, Mount Kilimanjaro, Tanzania

    Science.gov (United States)

    2002-01-01

    Mount Kilimanjaro (Kilima Njaro or 'shining mountain' in Swahili), the highest point in Africa, reaches 5,895 meters (19,340 feet) above sea level, tall enough to maintain a permanent snow cap despite being just 330 kilometers (210 miles) south of the equator. It is the tallest free-standing mountain on the Earth's land surface world, rising about 4,600 meters (15,000 feet) above the surrounding plain. Kilimanjaro is a triple volcano (has three peaks) that last erupted perhaps more than 100,000 years ago but still exudes volcanic gases. It is accompanied by about 20 other nearby volcanoes, some of which are seen to the west (left) in this view, prominently including Mount Meru, which last erupted only about a century ago. The volcanic mountain slopes are commonly fertile and support thick forests, while the much drier grasslands of the plains are home to elephants, lions, and other savanna wildlife.This 3-D perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM), a Landsat 7 satellite image, and a false sky. Topographic expression is vertically exaggerated two times.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot) resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive, managed by the U.S. Geological Survey (USGS).Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and

  1. Landsat Remote Sensing Data as an Alternative Approach for ...

    African Journals Online (AJOL)

    Rungwe Volcanic Province (RVP) is mostly covered by extrusive rocks that overlain the Precambrian basement. The use of Landsat data in this area has revealed the need of effective use of these data in geological mapping programs in Tanzania. Landsat band ratios 5/1, 3/7, 5/7 and 5/4 as well as R: G: B composite ...

  2. Imagen popular de la ciencia transmitida por los cómics

    Directory of Open Access Journals (Sweden)

    Adriana Patricia Gallego-Torres

    2007-01-01

    Full Text Available En este trabajo nos centraremos en el análisis crítico de la imagen popular de la ciencia transmitida por los cómics existentes en el mercado (en la medida que hagan referencia al trabajo científico.

  3. La competencia comunicativa como premisa para la imagen social del maestro

    Directory of Open Access Journals (Sweden)

    Xiomara Catalina Ravelo Gainza

    2017-11-01

    Full Text Available Este artículo promueve la reflexión en torno a la incidencia que tiene la competencia comunicativa en la imagen social del maestro que se configura en el imaginario social, a partir del estudio de las obras de varios autores que han incursionado en el tema.

  4. Feocromocitoma bilateral: la importancia de los estudios de diagnóstico por imagen

    Directory of Open Access Journals (Sweden)

    Igor I. Bonnet, MD

    2011-08-01

    Full Text Available Se presenta un caso clínico poco frecuente de feocromocitoma bilateral, en el cual los estudios de diagnóstico por imagen, tanto de información estructural como funcional, constituyeron una fuente fundamental para su detección y seguimiento.

  5. La publicidad en la creación y fortalecimiento de la Imagen Corporativa y de la reputación. Análisis de la Imagen de Marca de Red Bull

    OpenAIRE

    Alvarez González, Edgar

    2013-01-01

    Proyecto Fin de Grado leído en la Universidad Rey Juan Carlos en el curso académico 2013/2014. Director: Maximiliano Fernández Fernández Estudio teórico sobre la Imagen y Comunicación Corporativa. Observación de las estrategias de marketing y comunicativas para la creación de la Imagen Corporativa y estudio de su impacto en el público. Análisis de la estrategia marketing de Red Bull e investigación sobre su Imagen de Marca Ciencias de la Comunicación I

  6. ¿Imagen didáctica o uso didáctico de la image?

    Directory of Open Access Journals (Sweden)

    María Paz PRENDES ESPINOSA

    2009-11-01

    Full Text Available RESUMEN: Este artículo se centra en el análisis del proceso de comunicación mediado que utiliza como recurso la imagen fija de tipo gráfico, es decir, la imagen impresa. Partiendo de tal análisis se plantea el uso de la imagen en el ámbito educativo centrándose la discusión en torno al concepto de "imagen didáctica". Afirmamos que cualquier imagen puede ser utilizada con fines educativos, pero determinadas imágenes han sido preconcebidas de forma especial para ello. Respecto a este punto introducimos la distinción entre la imagen didáctica "per se" y la imagen didáctica "per accident".ABSTRACT: In this article we do a conceptual review about communication process when iconic sign is the mediator instrument. Iconic sign has signification and significance, denotation and connotation, an idea that drives us to question about interpretation problem when images are information transmission instruments. This problem is more relevant if we talk about didactic communication, so we must talk about efficacy of graphic communication too. Finally, we inquire the idea of "didactic images" or perhaps if it is better to conceive the "didactic use of the images.RESUME: Cet article fait a revisión conceptuel sur le procés de communication si nous utilisons les signes iconiques comme mediateurs. Le signe iconique a son significaron et son significant, denotation et connotation, et ce pour ca que nous devons poser la question de l'interpretation des images s'ils sont instruments de transmission d'information. Ce problem est plus remarquable si les images sont partie du procés de comunication didactique, puisque cet idee nour porte a la question de l'efficacité de la communication graphique. Finalment nous nous demandons sur la pertinance de la conception "d'image didactique" ou si c'est plus convenable "l'utilisation didactique des images"

  7. Progress Towards a 2012 Landsat Launch

    Science.gov (United States)

    Irons, Jim; Sabelhaus, Phil; Masek, Jeff; Cook, Bruce; Dabney, Phil; Loveland, Tom

    2012-01-01

    The Landsat Data Continuity Mission (LDCM) is on schedule for a December 2012 launch date. The mission is being managed by an interagency partnership between NASA and the U.S. Geological Survey (USGS). NASA leads the development and launch of the satellite observatory while leads ground system development. USGS will assume responsibility for operating the satellite and for collecting, archiving, and distributing the LDCM data following launch. When launched the satellite will carry two sensors into orbit. The Operational Land Imager (OLI) will collect data for nine shortwave spectral bands with a spatial resolution of 30 m (with a 15 m panchromatic band). The Thermal Infrared Sensor (TIRS) will coincidently collect data for two thermal infrared bands with a spatial resolution of 100 m. The OLI is fully assembled and tested and has been shipped by it?s manufacturer, Ball Aerospace and Technology Corporation, to the Orbital Sciences Corporation (Orbital) facility where it is being integrated onto the LDCM spacecraft. Pre-launch testing indicates that OLI will meet all performance specification with margin. TIRS is in development at the NASA Goddard Space Flight Center (GSFC) and is in final testing before shipping to the Orbital facility in January, 2012. The ground data processing system is in development at the USGS Earth Resources Observation and Science (EROS) Center. The presentation will describe the LDCM satellite system, provide the status of system development, and present prelaunch performance data for OLI and TIRS. The USGS has committed to renaming the satellite as Landsat 8 following launch.

  8. Imagens para não deixar de ver o gesto inumano

    Directory of Open Access Journals (Sweden)

    Guilherme Foscolo de Moura Gomes

    2017-12-01

    Full Text Available Seguindo a pegada deixada por Didi-Huberman e colocando em destaque a questão política da produção e reprodução das imagens, este ensaio pretende pensar as disputas tecnopolíticas por recurso a imagens. Nesse sentido, duas imagens específicas emergem no contexto das experiências transversais de formação acadêmica nas universidades brasileiras, imagens que contam com a presença de mestres e mestras de tradições orais como sujeitos capazes de legitimar modos outros de produção de saber e de fazer estético-políticas. A partir daí, coloca-se em movimento uma discussão que compreende a materialidade dos aparatos tecnológicos (via Nietzsche, Marx e Kittler, a teoria geral dos gestos em Flusser, o conceito de dispositivo para Agamben e as relações entre estética e política, segundo Benjamin e Rancière. Se parece evidente, de partida, que não se passa — — que não passaremos jamais — pelas tecnologias impunemente, o que (nos resta como possibilidade de resistência e de potência de vida para o combate frente ao avanço aniquilador da falsa política? Pouco, talvez nada, talvez um quase nada, apenas, talvez, e ainda, imagens.

  9. Ferramentas para visualização de imagens médicas em hospital universitário

    OpenAIRE

    Caritá,Edilson Carlos; Matos,André Luiz Mendes; Azevedo-Marques,Paulo Mazzoncini de

    2004-01-01

    OBJETIVO: Apresentar a implementação de "toolkits" para visualização de imagens médicas no padrão DICOM e fazer uma revisão dos fundamentos e características deste padrão. É apresentado o VDTApplication para visualização das imagens locais e remotas, e o VDTApplet, que possibilita a visualização das imagens utilizando um navegador. MATERIAIS E MÉTODOS: Os "toolkits" foram implementados utilizando a linguagem de programação Java. Para seu desenvolvimento foram consideradas as variações do padr...

  10. Relaciones entre imagen de marca corporativa, satisfaccion y lealtad: estudio en una escuela de negocios de la Argentina

    OpenAIRE

    Domingo Sanna

    2010-01-01

    El objetivo del presente trabajo es presentar las relaciones entre imagen de marca corporativa (CBI), satisfacción y lealtad en el contexto de una Escuela de Negocios de la Argentina. Se proponen y validan tres hipótesis en este estudio: (1) la imagen de marca es un antecedente de la satisfacción del cliente, (2) la relación entre la imagen de marca y la lealtad es a través de la satisfacción y (3) la satisfacción del cliente es un antecedente significativo de la lealtad. Se emplea una escala...

  11. Tecnologías emergentes para la captura y visualización de imagen 3D

    OpenAIRE

    Salvador Balaguer, Eva

    2017-01-01

    En el mundo en el que vivimos se reconocen tres dimensiones espaciales. Sin embargo, los sensores más extendidos son bidimensionales y la tecnología 3D presenta numerosas limitaciones que impiden un uso más extendido. En la presente tesis se hace un recorrido por parte de la tecnología 3D disponible estudiando ventajas, limitaciones y aplicaciones. De las diferentes alternativas de imagen 3D, se exploran los dispositivos autoestereoscópicos multivista, la imagen integral, la imagen con inform...

  12. EL SONIDO COMO DISPOSITIVO DE ADENSAMIENTO DE LA IMAGEN

    Directory of Open Access Journals (Sweden)

    Fernando PEREIRA

    2015-02-01

    Full Text Available Las prácticas videográficas de los artistas contemporáneos han llegado a la edad adulta. Es un hecho incontrovertible. Con ello algunos procedimientos y posiciones ideológicas dejan de tener sentido y dan lugar a otros más adaptados a esta nueva condición.Sabemos que el progresivo enraizamiento del vídeo en el universo de las prácticas artísticas ha sido posible gracias al interés cada vez mayor por la experimentación con los medios ligados al tiempo: la imagen y el sonido. No podemos, sin embargo, excluir la importancia de los desarrollos tecnológicos, sobre todo digitales, en el camino seguido hasta la actual situación. Podemos, sí, defender la primacía del proyecto autoral sobre los desarrollos técnicos.Estos mismos son los que posibilitaron la visualización de los sonidos en timelines, tal como en las imágenes. Es este un salto importante pues, la «democratización» masificadora de la miniaturización tecnológica, permitió a los artistas la edición más allá de los estudios profesionales y del interior de su propio espacio de taller. Es con estos elementos ahora presentes que la experimentación con los sonidos han tenido un interés creciente en las prácticas de los artistas. Sobre todo en el sentido de adensar, es decir, dar un espesor a las imágenes que por sí solas no poseen. En este sentido, se puede afirmar sin recelos que el sonido en las prácticas videográficas contemporáneas es encarado como un elemento con la misma dignidad de las imágenes siendo que, en algunos casos, puede incluso ser la componente decisiva para la recepción de la obra.Una obra que, en su conjunto, contiene las premisas que la hacen capaz de resistir al espectáculo y a la facilidad. El sonido natural de las imágenes tiene aquí un papel decisivo. Aunque solo sea para espesar sin más una relación de la disensión que en estos tiempos que corren no es solo necesaria sino que se afirma, por encima de todo

  13. Landsat and agriculture—Case studies on the uses and benefits of Landsat imagery in agricultural monitoring and production

    Science.gov (United States)

    Leslie, Colin R.; Serbina, Larisa O.; Miller, Holly M.

    2017-03-29

    Executive SummaryThe use of Landsat satellite imagery for global agricultural monitoring began almost immediately after the launch of Landsat 1 in 1972, making agricultural monitoring one of the longest-standing operational applications for the Landsat program. More recently, Landsat imagery has been used in domestic agricultural applications as an input for field-level production management. The enactment of the U.S. Geological Survey’s free and open data policy in 2008 and the launch of Landsat 8 in 2013 have both influenced agricultural applications. This report presents two primary sets of case studies on the applications and benefits of Landsat imagery use in agriculture. The first set examines several operational applications within the U.S. Department of Agriculture (USDA) and the second focuses on private sector applications for agronomic management.  Information on the USDA applications is provided in the U.S. Department of Agriculture Uses of Landsat Imagery for Global and Domestic Agricultural Monitoring section of the report in the following subsections:Estimating Crop Production.—Provides an overview of how Landsat satellite imagery is used to estimate crop production, including the spectral bands most frequently utilized in this application.Monitoring Consumptive Water Use.—Highlights the role of Landsat imagery in monitoring consumptive water use for agricultural production. Globally, a significant amount of agricultural production relies on irrigation, so monitoring water resources is a critical component of agricultural monitoring. National Agricultural Statistics Service—Cropland Data Layer.—Highlights the use of Landsat imagery in developing the annual Cropland Data Layer, a crop-specific land cover classification product that provides information on more than 100 crop categories grown in the United States. Foreign Agricultural Service—Global Agricultural Monitoring.—Highlights Landsat’s role in monitoring global agricultural

  14. Bayesian Method for Building Frequent Landsat-Like NDVI Datasets by Integrating MODIS and Landsat NDVI

    OpenAIRE

    Limin Liao; Jinling Song; Jindi Wang; Zhiqiang Xiao; Jian Wang

    2016-01-01

    Studies related to vegetation dynamics in heterogeneous landscapes often require Normalized Difference Vegetation Index (NDVI) datasets with both high spatial resolution and frequent coverage, which cannot be satisfied by a single sensor due to technical limitations. In this study, we propose a new method called NDVI-Bayesian Spatiotemporal Fusion Model (NDVI-BSFM) for accurately and effectively building frequent high spatial resolution Landsat-like NDVI datasets by integrating Moderate Resol...

  15. Quality Assessment of Landsat Surface Reflectance Products Using MODIS Data

    Science.gov (United States)

    Feng, Min; Huang, Chengquan; Channan, Saurabh; Vermote, Eric; Masek, Jeffrey G.; Townshend, John R.

    2012-01-01

    Surface reflectance adjusted for atmospheric effects is a primary input for land cover change detection and for developing many higher level surface geophysical parameters. With the development of automated atmospheric correction algorithms, it is now feasible to produce large quantities of surface reflectance products using Landsat images. Validation of these products requires in situ measurements, which either do not exist or are difficult to obtain for most Landsat images. The surface reflectance products derived using data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS), however, have been validated more comprehensively. Because the MODIS on the Terra platform and the Landsat 7 are only half an hour apart following the same orbit, and each of the 6 Landsat spectral bands overlaps with a MODIS band, good agreements between MODIS and Landsat surface reflectance values can be considered indicators of the reliability of the Landsat products, while disagreements may suggest potential quality problems that need to be further investigated. Here we develop a system called Landsat-MODIS Consistency Checking System (LMCCS). This system automatically matches Landsat data with MODIS observations acquired on the same date over the same locations and uses them to calculate a set of agreement metrics. To maximize its portability, Java and open-source libraries were used in developing this system, and object-oriented programming (OOP) principles were followed to make it more flexible for future expansion. As a highly automated system designed to run as a stand-alone package or as a component of other Landsat data processing systems, this system can be used to assess the quality of essentially every Landsat surface reflectance image where spatially and temporally matching MODIS data are available. The effectiveness of this system was demonstrated using it to assess preliminary surface reflectance products derived using the Global Land Survey (GLS) Landsat

  16. Modelo para gestionar la sustentabilidad de las organizaciones a través de la rentabilidad, adaptabilidad e imagen

    Directory of Open Access Journals (Sweden)

    Miguel Blázquez

    2012-01-01

    Full Text Available El presente artículo tiene por objetivo presentar una herramienta denominada hexágono de imagen que, junto con la herramienta de los hexágonos de utilidad-rentabilidad, desarrollada anteriormente, pretende servir de soporte a la gestión de la sustentabilidad, en pos de lograr un equilibrio dinámico entre ambos aspectos: rentabilidad e imagen. La metodología empleada comprende una síntesis del marco teórico de la investigación, consistente en una revisión bibliográfica y posterior propuesta sobre los conceptos e implicancias de imagen y rentabilidad como determinantes de la sustentabilidad organizacional. Como resultado se construyeron las bases lógicas y conceptuales del hexágono de imagen que se complementa con el anteriormente desarrollado hexágono de utilidad rentabilidad para operacionalizar en forma integrada la sustentabilidad organizacional.

  17. Modelo para gestionar la sustentabilidad de las organizaciones a través de la rentabilidad, adaptabilidad e imagen

    Directory of Open Access Journals (Sweden)

    Miguel Blázquez

    2012-10-01

    Full Text Available El presente artículo tiene por objetivo presentar una herramienta denominada hexágono de imagen que, junto con la herramienta de los hexágonos de utilidad-rentabilidad, desarrollada anteriormente, pretende servir de soporte a la gestión de la sustentabilidad, en pos de lograr un equilibrio dinámico entre ambos aspectos: rentabilidad e imagen. La metodología empleada comprende una síntesis del marco teórico de la investigación, consistente en una revisión bibliográfica y posterior propuesta sobre los conceptos e implicancias de imagen y rentabilidad como determinantes de la sustentabilidad organizacional. Como resultado se construyeron las bases lógicas y conceptuales del hexágono de imagen que se complementa con el anteriormente desarrollado hexágono de utilidad rentabilidad para operacionalizar en forma integrada la sustentabilidad organizacional.

  18. O \\"reino das plantas\\" nos livros didáticos de ciências: análise das imagens

    OpenAIRE

    Rená Manoel de Souza e Silva

    2017-01-01

    As imagens sempre desempenharam papel fundamental na compreensão do conhecimento científico e, portanto, também nos livros didáticos de ciências. Porém, pesquisas têm mostrado que as imagens não são transparentes; por isso, defendemos a fundamental compreensão dos professores em relação ao uso das imagens no processo de ensino-aprendizagem, e na orientação da leitura e no uso desse recurso como suporte das atividades pedagógicas. Esta pesquisa analisou as imagens presentes nos livros didático...

  19. Imagen. Diseño gráfico e industrial de América Latina

    Directory of Open Access Journals (Sweden)

    Revista Chasqui

    2015-01-01

    Full Text Available Extractamos las conclusiones y recomendaciones del Encuentro sobre Diseño Gráfico e Industrial de América Latina organizado por el Centro Imagen Latinoamericana, Sao Paulo, Brasil, 1986.

  20. Imagens da violência e violência das imagens: considerações em torno do documentário Jardim Ângela

    Directory of Open Access Journals (Sweden)

    Cristiane da Silveira Lima

    2007-10-01

    Full Text Available Este trabalho discute a relação entre imagens e violência, nãoapenas a partir do seu conteúdo, mas sobretudo a partir domodo pelo qual elas solicitam um engajamento do olhar.Para tanto, comparamos algumas idéias de Marie-JoséMondzain, Jean-Luc Nancy e Jean-Louis Comolli. Emseguida, discorremos brevemente sobre o filme  JardimÂngela, de Evaldo Mocarzel. Por fim, nos interrogamossobre o tipo de experiência da violência que o filmeproporciona ao espectador.

  1. Landsat TM and ETM+ Kansas Satellite Image Database (KSID)

    Data.gov (United States)

    Kansas Data Access and Support Center — The Kansas Satellite Image Database (KSID):2000-2001 consists of terrain-corrected, precision rectified spring, summer, and fall Landsat 5 Thematic Mapper (TM) and...

  2. LANDSAT-1 data, its use in a soil survey program

    Science.gov (United States)

    Westin, F. C.; Frazee, C. J.

    1975-01-01

    The following applications of LANDSAT imagery were investigated: assistance in recognizing soil survey boundaries, low intensity soil surveys, and preparation of a base map for publishing thematic soils maps. The following characteristics of LANDSAT imagery were tested as they apply to the recognition of soil boundaries in South Dakota and western Minnesota: synoptic views due to the large areas covered, near-orthography and lack of distortion, flexibility of selecting the proper season, data recording in four parts of the spectrum, and the use of computer compatible tapes. A low intensity soil survey of Pennington County, South Dakota was completed in 1974. Low intensity inexpensive soil surveys can provide the data needed to evaluate agricultural land for the remaining counties until detailed soil surveys are completed. In using LANDSAT imagery as a base map for publishing thematic soil maps, the first step was to prepare a mosaic with 20 LANDSAT scenes from several late spring passes in 1973.

  3. The global Landsat archive: Status, consolidation, and direction

    Science.gov (United States)

    Wulder, Michael A.; White, Joanne C.; Loveland, Thomas; Woodcock, Curtis; Belward, Alan; Cohen, Warren B.; Fosnight, Eugene A.; Shaw, Jerad; Masek, Jeffery G.; Roy, David P.

    2016-01-01

    New and previously unimaginable Landsat applications have been fostered by a policy change in 2008 that made analysis-ready Landsat data free and open access. Since 1972, Landsat has been collecting images of the Earth, with the early years of the program constrained by onboard satellite and ground systems, as well as limitations across the range of required computing, networking, and storage capabilities. Rather than robust on-satellite storage for transmission via high bandwidth downlink to a centralized storage and distribution facility as with Landsat-8, a network of receiving stations, one operated by the U.S. government, the other operated by a community of International Cooperators (ICs), were utilized. ICs paid a fee for the right to receive and distribute Landsat data and over time, more Landsat data was held outside the archive of the United State Geological Survey (USGS) than was held inside, much of it unique. Recognizing the critical value of these data, the USGS began a Landsat Global Archive Consolidation (LGAC) initiative in 2010 to bring these data into a single, universally accessible, centralized global archive, housed at the Earth Resources Observation and Science (EROS) Center in Sioux Falls, South Dakota. The primary LGAC goals are to inventory the data held by ICs, acquire the data, and ingest and apply standard ground station processing to generate an L1T analysis-ready product. As of January 1, 2015 there were 5,532,454 images in the USGS archive. LGAC has contributed approximately 3.2 million of those images, more than doubling the original USGS archive holdings. Moreover, an additional 2.3 million images have been identified to date through the LGAC initiative and are in the process of being added to the archive. The impact of LGAC is significant and, in terms of images in the collection, analogous to that of having had twoadditional Landsat-5 missions. As a result of LGAC, there are regions of the globe that now have markedly improved

  4. Global Man-made Impervious Surface (GMIS) Dataset From Landsat

    Data.gov (United States)

    National Aeronautics and Space Administration — The Global Man-made Impervious Surface (GMIS) Dataset From Landsat consists of global estimates of fractional impervious cover derived from the Global Land Survey...

  5. Classificação orientada a objeto de imagens de sensoriamento remoto em estudos epidemiológicos sobre leishmaniose visceral em área urbana

    Directory of Open Access Journals (Sweden)

    Andréa Sobral de Almeida

    2014-08-01

    Full Text Available Neste estudo, explorou-se o uso da classificação orientada a objeto de imagens de sensoriamento remoto em estudos epidemiológicos sobre leishmaniose visceral (LV em áreas urbanas. A classificação orientada a objeto foi aplicada a cenas Landsat 5 TM da cidade de Teresina, Piauí, Brasil, para obtenção de informações ambientais e temperatura. Para o período de 1993-1996, a taxa de incidência de LV nos setores censitários da cidade foi positivamente correlacionada com a área do setor censitário coberta por vegetação densa, rasteira e solo exposto e negativamente com a área coberta por água e áreas densamente ocupadas. No período de 2001-2006, foram encontradas correlações positivas com vegetação densa, rasteira, solo exposto e áreas densamente ocupadas e negativas com áreas urbanas com alguma vegetação. A temperatura da superfície terrestre foi negativamente associada à incidência de LV nos dois períodos. A classificação orientada a objeto pode ser útil para caracterizar paisagens associadas à ocorrência da LV em áreas urbanas e delimitar áreas de risco para definição de prioridades na implementação de intervenções.

  6. Landsat 8 Data Modeled as DGGS Data Cubes

    Science.gov (United States)

    Sherlock, M. J.; Tripathi, G.; Samavati, F.

    2016-12-01

    In the context of tracking recent global changes in the Earth's landscape, Landsat 8 provides high-resolution multi-wavelength data with a temporal resolution of sixteen days. Such a live dataset can benefit novel applications in environmental monitoring. However, a temporal analysis of this dataset in its native format is a challenging task mostly due to the huge volume of geospatial images and imperfect overlay of different day Landsat 8 images. We propose the creation of data cubes derived from Landsat 8 data, through the use of a Discrete Global Grid System (DGGS). DGGS referencing of Landsat 8 data provides a cell-based representation of the pixel values for a fixed area on earth, indexed by keys. Having the calibrated cell-based Landsat 8 images can speed up temporal analysis and facilitate parallel processing using distributed systems. In our method, the Landsat 8 dataset hosted on Amazon Web Services (AWS) is downloaded using a web crawler and stored on a filesystem. We apply the cell-based DGGS referencing (using Pyxis SDK) to Landsat 8 images which provide a rhombus based tessellation of equal area cells for our use-case. After this step, the cell-images which overlay perfectly on different days, are stacked in the temporal dimension and stored into data cube units. The depth of the cube represents the number of temporal images of the same cell and can be updated when new images are received each day. Harnessing the regular spatio-temporal structure of data cubes, we want to compress, query, transmit and visualize big Landsat 8 data in an efficient way for temporal analysis.

  7. SPOT: How good for geology? A comparison with LANDSAT MSS

    Science.gov (United States)

    Sesoeren, A.

    1986-12-01

    Geological interpretation possibilities of SPOT MSS and LANDSAT MSS positive prints enlarged to the same scale were compared, using as a test area part of the Jebel Amour (Algeria). The SPOT imagery offers many advantages, filling the gap between remote sensing from space and aerial photography. The best results by visual interpretation are obtained in combining SPOT for the required details with LANDSAT for the synoptic veiw. Further improvements are expected from the use of SPOT stereo-pairs.

  8. La práctica corporal y la imagen corporal: reconstruyendo significados

    Directory of Open Access Journals (Sweden)

    Angela Vaquero Barba

    2014-01-01

    Full Text Available Este trabajo presenta una experiencia, en el ámbito de la formación del profesorado, vinculada a la propia imagen corporal. Ha pretendido, tomando como eje la actividad corporal y motriz, tomar conciencia de cómo percibimos, sentimos y valoramos nuestro cuerpo; valorar la actividad motriz-corporal como herramienta para la construcción de nuevos significados; y capacitar al alumnado para reaprender la manera en que percibimos, sentimos y valoramos nuestro cuerpo. Los resultados apoyan la necesidad de capacitar al alumnado femenino para valorar su imagen corporal, la idoneidad de las prácticas corporales para impulsar procesos de reconstrucción y el interés de la escritura como herramienta que da forma a la reconstrucción.

  9. La imagen de la mujer caída en algunas obras de la literatura mexicana

    Directory of Open Access Journals (Sweden)

    Martha Elena Munguía Zatarain

    2016-01-01

    Full Text Available En este ensayo se hace una revisión de las formas en las que se fue conformando en la literatura mexicana del siglo xix la imagen de la mujer caída, con claras reminiscencias religiosas. Textos de Payno, Vicente Riva Palacio, Rafael Delgado, Tablada, entre otros, integran el corpus del que se parte para este trabajo. Se analiza cómo se filtran en las obras preocupaciones de índole social y cómo, con frecuencia, se daba una deriva hacia perspectivas morales y condenatorias de la mujer prostituida. Se busca, en todo momento, reconstruir el diálogo polémico que sostuvo el arte verbal con la profusión discursiva de índole científica y moral de la época y se rastrean las reminiscencias de esta imagen en algunas obras del siglo xx.

  10. Digitalizador 3D para imagens antropométricas do pé

    OpenAIRE

    Bez, Marta R.; Seligman, Luiza; Estivalet, Patricia S.; Silva, Magalí P.

    2006-01-01

    Este artigo apresenta um sistema de hardware e software para extrair medidas de pés da população brasileira. Sabe-se que os pés são diferentes, dependendo de diversos fatores como sexo, idade, raça, etc. Atualmente, pouco se tem levado em consideração estas diferenças no processo de construção do calçado brasileiro. A idéia é, colher uma imagem plantar do pé através de um scanner e ao mesmo tempo cinco imagens laterais através de uma câmera giratória. A partir destas imagens obter medidas ...

  11. Happing: Nativos digitales al servicio de la imagen corporativa de Coca-Cola

    Directory of Open Access Journals (Sweden)

    Carmen Llorente Barroso

    2012-04-01

    Full Text Available Happing, la comunidad de la gente que se atreve a ser feliz, es la nueva propuesta de la compañía Coca-Cola para su promoción web en España; su éxito entre los nativos digitales pone de manifiesto el acierto de esta gran marca internacional, que ha sabido aprovechar la creatividad de los nativos digitales que participan en la comunidad, para dar brillo a una Imagen Corporativa Intencional de sobra solvente. Los nativos digitales que contribuyen a la creación del mágico mundo Coca-Cola, participan gustosos de la oportunidad expresiva que les brida la compañía, fascinados por la filosofía de vida que siempre ha sido bandera de la Imagen de marca de Coca-Cola, ahora alimentada y, en parte, creada por esos nativos digitales.

  12. ESTIMAÇÃO DA IDADE DA REGENERAÇÃO DA VEGETAÇÃO DE CERRADO A PARTIR DE IMAGENS LANDSAT

    Directory of Open Access Journals (Sweden)

    Philippe Maillard, Priscilla S. Costa-Pereira

    2011-07-01

    Full Text Available Nas regiões em que a rede de monitoramento hidrossedimentológico é precária ou inexistente, a utilização de modelos hidrológicos, de base física que proporcionem estimativas da geração de escoamento superficial e a perda de solo, se torna muito útil para fins de planejamento das bacias hidrográficas. O presente trabalho trata da aplicação do modelo hidrossedimentológico “Soil And Water Assessment Tool” nas Sub-Bacias 2 e 1 da Bacia Experimental de São João do Cariri. O modelo com a interface ArcSWAT, que se une ao SIG, necessita da entrada de “Modelo Digital de Elevação” (MDE da bacia e as simulações foram realizadas utilizando dois MDEs para fins de análise comparativa: um originado a partir da interpolação de dados de campo e outro obtido através de sensoriamento remoto. Com isto foi possível verificar a confiabilidade do uso de MDE obtido por sensoriamento remoto. Em nível das sub-bacias experimentais, foi realizada a parametrização, na Sub-Bacia 2, e a validação, na Sub-Bacia 1. O desempenho do modelo, para a geração da lâmina escoada, foi avaliado pelo coeficiente de determinação (R² e do fator da eficiência de Nash-Sutcliffe. Os resultados mostram desempenho satisfatório para ambos os MDEs, mostrando a pouca sensibilidade da topografia da geração de lâmina simulada em pequenas bacias. Por outro lado, a produção de sedimentos apresentou resultados insatisfatórios, além do que foi significativa a discrepância da distribuição da erosão do solo na superfície da bacia pelos dois MDEs utilizados.

  13. Imagen corporativa como elemento de posicionamiento estratégico en universidades públicas

    Directory of Open Access Journals (Sweden)

    Wilmar Sierra Toncel

    2014-12-01

    Full Text Available El presente artículo tiene como propósito socializar los resultados de la investigación imagen corporativa como elemento de posicionamiento en universidades públicas caso Universidad del Zulia, República Bolivariana de Venezuela y Universidad de La Guajira –Colombia–, que tiene como objetivo analizar la imagen corporativa y el posicionamiento en universidades públicas. Los planteamientos teóricos se fundamentaron en Costa (2003, Van Riel (1997, Scheinson (1997, Nicholas (1996, Pizzolante (1994, Sánchez (2005, Kaplan & Norton (2001, David (1996, entre otros. El tipo de investigación fue de corte transversal, descriptiva y correlacional, con diseño no experimental y de campo. Para la recolección de la información se utilizó una encuesta estructurada aplicada a la muestra poblacional constituida por 99 docentes y directivos. Se establecieron las dimensiones percepción, identidad corporativa, gestión, bases, tipos y estrategias de posicionamiento. Se concluyó que existe estrecha relación entre imagen corporativa y posicionamiento, con un coeficiente de correlación de Pearson de 1.0, considerada altamente positiva, lo que demuestra que la imagen corporativa es un elemento de posicionamiento de universidades públicas; sin embargo, se evidencian profundas debilidades en su gestión. Por lo tanto, se requiere aplicar buenas prácticas administrativas, mayor rigor científico y técnico en su diseño y considerarla como un activo importante dentro de la organización.

  14. La imagen pública. Un valor de comunicación

    Directory of Open Access Journals (Sweden)

    Francisco Echeverría Remón

    2012-04-01

    Full Text Available La imagen pública de una empresa está formada por las múltiples imágenes que proyectan las diferentes partes que la componen, ya sean divisiones o áreas (financieras, producción, comunicación... o personas que, de forma individual o colectiva, emiten de su empresa. Esta imagen estará formada, a su vez, por las múltiples imágenes públicas de los stakeholders y de cada uno de sus entornos o “territorio” que interiorice de la misma, conformando, la suma de todas ellas, la verdadera imagen pública de la compañía. Este proceso de comunicación es de enorme complejidad, interviniendo, entre otros factores, la marca y la identidad corporativa (como representación simbólica de ésta y es, a través de la marca, donde, mediante un diálogo entre todas las partes, se debe crear un vínculo emocional con el público, cliente o no, y con la sociedad. Estos procesos complejos, requerirán la asignación, por parte de la compañía, de recursos humanos y financieros específicos, reunidos alrededor del líder de la marca y con la intervención de diferentes expertos y consultores de imagen y marca, que aportan una visión más amplia a la organización y unos recursos especializados y en permanente actualización.

  15. La imagen del Departamento de Ingeniería Mecánica

    Directory of Open Access Journals (Sweden)

    Julio Mario Rodríguez Devis

    1991-07-01

    Full Text Available El presente trabajo extrae los principales puntos referentes al estudio de imagen de la Facultad de Ingenieria de la Universidad Nacional de Colombia, sede Bogotá, y se centra en el departamento de Ingenieria Mecánica. El estudio fue contratado a finales de 1989, y coordinado por el autor; como parte de una estrategia de la Facultad de vincularse más activamente al sector productivo.

  16. La observación de la imagen del cuerpo en las sesiones de psicomotricidad

    Directory of Open Access Journals (Sweden)

    Marisa MIR POZO

    2008-01-01

    Full Text Available En este artículo queremos mostrar el proceso de observación llevado a cabo en torno a algunos indicadores del desarrollo afectivo del niño a partir del repertorio de actividades habituales en las sesiones de práctica psicomotriz, con la finalidad de poder evaluar la construcción de una imagen ajustada y positiva.

  17. Desarrollo de un software de reconocimiento de imagen para ensayos EMC de inmunidad

    OpenAIRE

    Cerro Gálvez, Ibán

    2012-01-01

    Desenvolupar un software de reconeixement d'imatge per a detectar mal funcionaments durant els assaigs d'immunitat d'EMC. [ANGLÈS] Develop an image recognition software to detect errors during EMC immunity test. [CASTELLÀ] Desarrollar un software de reconocimiento de imagen para detectar el mal funcionamiento durante los ensayos de inmunidad del EMC. [CATALÀ] Desenvolupar un software de reconeixement d'imatge per a detectar mal funcionaments durant els assaigs d'immunitat d'EMC.

  18. Das imagens do mundo ao mundo das imagens − as possibilidades da TV digital para a educação

    Directory of Open Access Journals (Sweden)

    Simone de Lucena Ferreira

    2010-04-01

    Full Text Available O uso de imagens foi uma das primeirasformas da comunicação humana quecomeçou com as garatujas nas cavernasno período da pré-história. O desenvolvimentode tecnologias, como a máquinafotográfica, o cinema e a televisãopermitiu que as imagens pudessem serregistradas e apresentadas a um maiornúmero de pessoas. As tecnologias digitaisdesenvolvidas a partir na metadedo século XX, possibilitaram mudançasna forma de agir, pensar, se relacionare estudar dos indivíduos. A TV digital éuma dessas tecnologias que poderátrazer grandes transformações sociaisa depender das escolhas políticas eeconômicas feitas por cada país. Nesteartigo, abordamos sobre as possibilidadese potencialidades na TV digital naeducação considerando o uso das redescolaborativas como importantes para aimplantação do Canal de Educação naTV digital.

  19. Lo que todos miran y nadie quiere ver: la imagen de la vida desnuda

    Directory of Open Access Journals (Sweden)

    Mercedes Ruvituso

    2017-06-01

    Full Text Available Este trabajo analiza el tercer volumen de la serie “Homo sacer” de Giorgio Agamben, Quel che resta di Auschwitz. L’archivio e il testimone (1998, para mostrar que sus controvertidas tesis sobre la paradoja del testimonio de Auschwitz y la idea de que éste es “inimaginable” implican un concepto técnico de la imagen propio de su pensamiento. Para ello, muestra cómo la paradójica dialéctica de visibilidad e invisibilidad de la vida desnuda del musulmán que describe este libro, se basa en una crítica y reelaboración del concepto de imagen contenido en la categoría griega de prósopon, la iconografía de la Gorgona y la idea romana dignitas. El trabajo busca por último resituar estas tesis en el contexto más general del problema de la imagen en otras investigaciones de Agamben.

  20. TÉCNICAS DE INTERPRETAÇÃO VISUAL DE IMAGENS

    Directory of Open Access Journals (Sweden)

    Andrea de Castro Panizza

    2011-04-01

    Full Text Available Hoje, as imagens de satélite e fotografias aéreas fazem parte do cotidiano. Elas estão em todas as mídias. Isso vem favorecendo o treinamento do leitor a ver a paisagem de uma maneira diferente, do alto e, assim, aumentar seu campo de visão. A observação das paisagens realiza-se de diferentes formas e cada uma favorece a identificação e a interpretação de objetos ou fenômenos. As técnicas de interpretação visual de imagens são amplamente utilizadas nos estudos sobre as paisagens. Elas exigem, porém, treinamento do usuário. Este artigo apresenta um roteiro metodológico que contém critérios bem definidos e adaptados para a interpretação visual tanto de fotografias aéreas quanto de imagens de satélite e uma proposta de exercício didático aplicada ao ensino da Geografia.

  1. Metodologia de Baixo Custo para Registro de Imagens do Arco Voltaico de Soldagem

    Directory of Open Access Journals (Sweden)

    Anna Louise Voigt

    2017-12-01

    Full Text Available Resumo Equipamentos que permitem o registro de imagens são importantes ferramentas no estudo dos processos de soldagem. Contudo, câmeras de alta velocidade que permitem a captura de imagens do arco voltaico e dos fenômenos envolvidos, a exemplo da transferência metálica, são limitadas devido ao seu alto custo. Tendo em visto a utilização de câmeras de baixo custo relativo, o presente estudo tem por objetivo avaliar os efeitos dos parâmetros de exposição no registro do arco voltaico, sendo este, semelhante ao que se observa através da máscara de soldagem. Logo, analisou-se os efeitos da abertura do diafragma, tempo de exposição e sensibilidade ISO. Além destes parâmetros, foram empregados filtros na lente da câmera a fim de melhorar a qualidade das imagens. Por fim, aplicou-se o conhecimento adquirido no registro do processo TIG com alimentação de arame frio, sendo possível a visualização das gotas sendo transferidas bem como da poça de fusão.

  2. Más de un siglo de imagen médica

    Directory of Open Access Journals (Sweden)

    Desco, Manuel

    2004-02-01

    Full Text Available De acuerdo con varias encuestas, los médicos consideran que la imagen médica ha sido y es, con mucha diferencia, el avance técnico que mayor impacto ha tenido en su práctica clínica. El hombre es un animal esencialmente visual. Gran parte de nuestro cerebro está dedicado al procesamiento de la información visual; muchas estrategias mnemotécnicas y de aprendizaje rápido tratan de obtener ventaja de este hecho. Por esta razón, la información diagnóstica que proporcionan los sistemas de imagen es enormemente apreciada por el médico, hasta el punto de que, hoy en día, resulta difícil encontrar situaciones clínicas en las que no se haya hecho uso de una o más técnicas de imagen.…

  3. La imagen turística de Marruecos proporcionada por Internet: reinterpretando el orientalismo

    Directory of Open Access Journals (Sweden)

    Enrique López Lara

    2005-01-01

    Full Text Available El artículo sistematiza y analiza la imagen turística de Marruecos que transmite Internet. Se trazan los rasgos básicos de la formación de la imagen de cara a la oferta de productos turísticos de carácter cultural y urbano de Marruecos con la aparición de las nuevas redes de información y comunicaciones. El análisis muestra la recreación de un neo-orientalismo, en el sentido que se ofrece una «construcción» de Oriente como producto intelectual europeo, una imagen del «Otro» como frívola fantasía europea, relacionada con la fascinación y el deseo de «Otra» cultura (lejana-distante-diferenciada basada en manifestaciones empíricas o el conocimiento superficial, tangencial e interesado de la realidad (como producto de consumo de masas. Finaliza con la propuesta de buscar nuevas perspectivas para el desarrollo turístico de Marruecos, con la puesta en marcha de una oferta más diversificada.

  4. Imagens Intoleráveis: horror e morte nas embalagens de produtos de tabaco

    Directory of Open Access Journals (Sweden)

    Ana Amélia Erthal

    2014-07-01

    Full Text Available O artigo pretende explorar o conjunto das advertências sanitárias em mensagens de texto e imagens, utilizadas nas embalagens de produtos de tabaco como determinação da Organização Mundial de Saúde, para controle da epidemia do consumo de cigarros em todo o mundo. O Brasil foi um dos quatro países a estampar em até 50% as embalagens com imagens tétricas alertando para as consequências advindas do hábito de fumar e, suas demais políticas de controle são tomadas como exemplo de boas práticas em outros países. O objetivo é questionar se as imagens comunicam seu propósito a despeito de sua dramaticidade. Para tanto serão usados os conceitos de “imagem intolerável”, de Jacques Rancière, e a credibilidade e verossimilhança em George Didi-Huberman e Philippe Dubois, respectivamente.

  5. Teatro imagen: expresión corporal y dramatización

    Directory of Open Access Journals (Sweden)

    Tomás MOTOS TERUEL

    2010-11-01

    Full Text Available En este texto presentamos el Teatro Imagen de Augusto Boal. Se trata de una herramienta de intervención dramática basada en el lenguaje del cuerpo que mediante iconografías realizadas a través de las posturas adoptadas por los participantes trata de analizar un estado concreto de conflicto personal o colectivo provocado por una situación real de opresión, miedo o exclusión, con la finalidad de buscar colectivamente alternativas reales de solución para llevarlas a la práctica. Las imágenes elaboradas posteriormente son dinamizadas mediante diferentes procedimientos para así crear escenas dramáticas. Además, el Teatro Imagen también se puede utilizar en el ámbito educativo como un procedimiento para la dinamización de textos y animación a la lectura e incluso como alternativa creativa e intuitiva para la evaluación. El Teatro Imagen, modalidad transversal e integradora de intervención educativa centrada en la dramatización y en la expresión corporal, es un espacio complejo donde confluyen la estética, la ciudadanía, la ética y la psicoterapia.

  6. La imagen de los destinos turísticos cubanos. Un acercamiento desde La Habana Vieja

    Directory of Open Access Journals (Sweden)

    Dra. Maité Echarri Chávez

    2012-11-01

    Full Text Available El estudio y análisis de la imagen de los destinos turísticos, a partir de las expectativas del cliente y desde la perspectiva de las entidades comercializadoras de los mismos, constituye todo un reto teniendo en cuenta que la decisión de viajar está también condicionada por un cúmulo de información que puede no ser correspondida con la realidad que se constata en el lugar de destino y los medios de comunicación. El informe que se presenta es resultado de investigaciones cuyo objetivo es conocer y analizar esas expectativas para el caso cubano, así como el análisis de la imagen inducida desde la perspectiva de las entidades comercializadoras, tomando como referente La Habana Vieja, principal destino de ciudad de Cuba. Los resultados obtenidos permitieron reconocer los íconos culturales que identifican a la ciudad y el papel que los mismos juegan en los diferentes soportes comunicacionales, proporcionándoles a las entidades gestoras de la actividad turística el punto de vista adecuado para la futura toma de decisiones en el ámbito de la imagen.

  7. Automated Sargassum Detection for Landsat Imagery

    Science.gov (United States)

    McCarthy, S.; Gallegos, S. C.; Armstrong, D.

    2016-02-01

    We implemented a system to automatically detect Sargassum, a floating seaweed, in 30-meter LANDSAT-8 Operational Land Imager (OLI) imagery. Our algorithm for Sargassum detection is an extended form of Hu's approach to derive a floating algae index (FAI) [1]. Hu's algorithm was developed for Moderate Resolution Imaging Spectroradiometer (MODIS) data, but we extended it for use with the OLI bands centered at 655, 865, and 1609 nm, which are comparable to the MODIS bands located at 645, 859, and 1640 nm. We also developed a high resolution true color product to mask cloud pixels in the OLI scene by applying a threshold to top of the atmosphere (TOA) radiances in the red (655 nm), green (561 nm), and blue (443 nm) wavelengths, as well as a method for removing false positive identifications of Sargassum in the imagery. Hu's algorithm derives a FAI for each Sargassum identified pixel. Our algorithm is currently set to only flag the presence of Sargassum in an OLI pixel by classifying any pixel with a FAI > 0.0 as Sargassum. Additionally, our system geo-locates the flagged Sargassum pixels identified in the OLI imagery into the U.S. Navy Global HYCOM model grid. One element of the model grid covers an area 0.125 degrees of latitude by 0.125 degrees of longitude. To resolve the differences in spatial coverage between Landsat and HYCOM, a scheme was developed to calculate the percentage of pixels flagged within the grid element and if above a threshold, it will be flagged as Sargassum. This work is a part of a larger system, sponsored by NASA/Applied Science and Technology Project at J.C. Stennis Space Center, to forecast when and where Sargassum will land on shore. The focus area of this work is currently the Texas coast. Plans call for extending our efforts into the Caribbean. References: [1] Hu, Chuanmin. A novel ocean color index to detect floating algae in the global oceans. Remote Sensing of Environment 113 (2009) 2118-2129.

  8. La imagen de empresa como factor determinante en la elección de operador: identidad y posicionamiento de las empresas de comunicaciones móviles

    OpenAIRE

    García de los Salmones Sánchez, María del Mar

    2002-01-01

    La imagen corporativa se constituye como un activo intangible fuente de ventajas competitivas que debe ser correctamente gestionado para extraerle todo su potencial. Partiendo de una revisión de literatura sobre imagen e identidad, la Tesis profundiza en el carácter multidimensional de la imagen y en las variables que influyen en la misma. Para ello se plantean diversas hipótesis referidas a los determinantes de la elección de empresa con mejor imagen global, desarrollando al respecto un mode...

  9. LBA-ECO LC-24 Landsat TM and ETM+ Land Cover, Southern Para, Brazil: 1984-2003

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: This data set is a five-class land cover for Southern Para for the years 1984 (Landsat MSS), 1988 (Landsat TM), 1996, and 2003 (Landsat ETM+). The final...

  10. LBA-ECO LC-24 Landsat TM and ETM+ Land Cover, Southern Para, Brazil: 1984-2003

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set is a five-class land cover for Southern Para for the years 1984 (Landsat MSS), 1988 (Landsat TM), 1996, and 2003 (Landsat ETM+). The final...

  11. Landsat Data Continuity Mission - Launch Fever

    Science.gov (United States)

    Irons, James R.; Loveland, Thomas R.; Markham, Brian L.; Masek, Jeffrey G.; Cook, Bruce; Dwyer, John L.

    2012-01-01

    The year 2013 will be an exciting period for those that study the Earth land surface from space, particularly those that observe and characterize land cover, land use, and the change of cover and use over time. Two new satellite observatories will be launched next year that will enhance capabilities for observing the global land surface. The United States plans to launch the Landsat Data Continuity Mission (LDCM) in January. That event will be followed later in the year by the European Space Agency (ESA) launch of the first Sentinel 2 satellite. Considered together, the two satellites will increase the frequency of opportunities for viewing the land surface at a scale where human impact and influence can be differentiated from natural change. Data from the two satellites will provide images for similar spectral bands and for comparable spatial resolutions with rigorous attention to calibration that will facilitate cross comparisons. This presentation will provide an overview of the LDCM satellite system and report its readiness for the January launch.

  12. Landsat Science: 40 Years of Innovation and Opportunity

    Science.gov (United States)

    Cook, Bruce D.; Irons, James R.; Masek, Jeffrey G.; Loveland, Thomas R.

    2012-01-01

    Landsat satellites have provided unparalleled Earth-observing data for nearly 40 years, allowing scientists to describe, monitor and model the global environment during a period of time that has seen dramatic changes in population growth, land use, and climate. The success of the Landsat program can be attributed to well-designed instrument specifications, astute engineering, comprehensive global acquisition and calibration strategies, and innovative scientists who have developed analytical techniques and applications to address a wide range of needs at local to global scales (e.g., crop production, water resource management, human health and environmental quality, urbanization, deforestation and biodiversity). Early Landsat contributions included inventories of natural resources and land cover classification maps, which were initially prepared by a visual interpretation of Landsat imagery. Over time, advances in computer technology facilitated the development of sophisticated image processing algorithms and complex ecosystem modeling, enabling scientists to create accurate, reproducible, and more realistic simulations of biogeochemical processes (e.g., plant production and ecosystem dynamics). Today, the Landsat data archive is freely available for download through the USGS, creating new opportunities for scientists to generate global image datasets, develop new change detection algorithms, and provide products in support of operational programs such as Reducing Emissions from Deforestation and Forest Degradation in Developing Countries (REDD). In particular, the use of dense (approximately annual) time series to characterize both rapid and progressive landscape change has yielded new insights into how the land environment is responding to anthropogenic and natural pressures. The launch of the Landsat Data Continuity Mission (LDCM) satellite in 2012 will continue to propel innovative Landsat science.

  13. Bridging the Divide: Translating Landsat Research Into Usable Science

    Science.gov (United States)

    Rocchio, L. E.; Davis, A. L.

    2006-12-01

    Science has long served humankind. Breakthroughs in medicine have increased longevity and advances in technology have made modern-day conveniences possible. Yet, social benefits begotten by the environmental sciences, although critical for the survival of humanity, have not always been as widely recognized or used. To benefit today's rapidly growing population, the divides between environmental research, applied environmental science, and use of this information by decision makers must be bridged. Lessons about the translation from research to usable science can be learned from the four decades of Landsat history, and these lessons can serve as useful models for bridging the gaps between new technology, scientific research, and the use of that research and technology in real-world problem solving. In 1965, William Pecora, then-director of the U.S. Geological Survey, proposed the idea of a remote sensing satellite program to gather facts about natural resources of Earth. For the next seven years, an intense campaign showing the depth and diversity of satellite imagery applications was waged. This led to the 1972 launch of the first civilian land-observing satellite, Landsat 1. By 1975, successful application research based on Landsat 1 imagery prompted then-NASA Administrator Dr. James Fletcher to proclaim that if one space age development would save the world, it would be Landsat and its successor satellites. Thirty-four years of continual Landsat imaging and related-research has lead to the implementation of many socially beneficial applications, such as improved water management techniques, crop insurance fraud reduction, illicit crop inventories, natural disaster relief planning, continent-scale carbon estimates, and extensive cartographic advances. Despite these successes, the challenge of translating Landsat research into realized social benefits remains. Even in this geospatially-savvy era, the utility of Landsat largely escapes policymakers. Here, in an

  14. Remote sensing of species diversity using Landsat 8 spectral variables

    Science.gov (United States)

    Madonsela, Sabelo; Cho, Moses Azong; Ramoelo, Abel; Mutanga, Onisimo

    2017-11-01

    The application of remote sensing in biodiversity estimation has largely relied on the Normalized Difference Vegetation Index (NDVI). The NDVI exploits spectral information from red and near infrared bands of Landsat images and it does not consider canopy background conditions hence it is affected by soil brightness which lowers its sensitivity to vegetation. As such NDVI may be insufficient in explaining tree species diversity. Meanwhile, the Landsat program also collects essential spectral information in the shortwave infrared (SWIR) region which is related to plant properties. The study was intended to: (i) explore the utility of spectral information across Landsat-8 spectrum using the Principal Component Analysis (PCA) and estimate alpha diversity (α-diversity) in the savannah woodland in southern Africa, and (ii) define the species diversity index (Shannon (H‧), Simpson (D2) and species richness (S) - defined as number of species in a community) that best relates to spectral variability on the Landsat-8 Operational Land Imager dataset. We designed 90 m × 90 m field plots (n = 71) and identified all trees with a diameter at breast height (DbH) above 10 cm. H‧, D2 and S were used to quantify tree species diversity within each plot and the corresponding spectral information on all Landsat-8 bands were extracted from each field plot. A stepwise linear regression was applied to determine the relationship between species diversity indices (H‧, D2 and S) and Principal Components (PCs), vegetation indices and Gray Level Co-occurrence Matrix (GLCM) texture layers with calibration (n = 46) and test (n = 23) datasets. The results of regression analysis showed that the Simple Ratio Index derivative had a higher relationship with H‧, D2 and S (r2= 0.36; r2= 0.41; r2= 0.24 respectively) compared to NDVI, EVI, SAVI or their derivatives. Moreover the Landsat-8 derived PCs also had a higher relationship with H‧ and D2 (r2 of 0.36 and 0.35 respectively) than the

  15. Orientação de imagens CBERS-2B usando o modelo rigoroso de colinearidade com dados orbitais

    Directory of Open Access Journals (Sweden)

    José Marcato Junior

    Full Text Available Atualmente, o imageamento orbital é uma das principais técnicas de coleta de informações geoespaciais. Embora os sistemas orbitais sejam equipados com sensores de orientação direta (GNSS, giroscópios, sensores de estrelas, dentre outros, nem sempre as imagens corrigidas a partir dos dados (efemérides e atitude provenientes destes sensores apresentam a acurácia requerida para certas aplicações. Uma das alternativas para solucionar este problema é a orientação dessas imagens considerando as informações de órbita (efemérides e atitude com o uso adicional de pontos de apoio. O objetivo principal deste trabalho consiste em avaliar experimentalmente o modelo de colinearidade com dados orbitais no processo de orientação de imagens CBERS-2B. Este modelo foi implementado no programa TMS (Triangulação MultiSsensor, seguindo a abordagem de triangulação multissensor. Foram realizados experimentos com imagens do nível 1 (com apenas correção radiométrica coletadas pelos sensores CCD e HRC. Nos casos estudados verificou-se que a utilização das informações de órbita possibilita a orientação de imagens CBERS-2B com um número reduzido de pontos de apoio.

  16. Imagen exogrupal de adolescentes autóctonos e inmigrantes latinos: influencia del contacto intergrupal y la edad

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    Sonsoles Calderón-López

    2015-10-01

    Full Text Available Se presentan dos estudios cuyo objetivo es conocer la imagen exogrupal de 471 adolescentes autóctonos y 333 inmigrantes de origen latinoamericano residentes en Madrid, y analizarla en función de su edad y del grado de contacto con miembros del exogrupo. Para evaluar la percepción grupal se elaboró un instrumento compuesto por descripciones proporcionadas por adolescentes de similares características en un estudio preliminar con grupos de discusión. El instrumento resultante presenta igual estructura y propiedades psicométricas adecuadas en ambos grupos de participantes y permite evaluar la imagen exogrupal total y sus componentes positivo y negativo. En consonancia con las investigaciones existentes, los adolescentes latinos tienen una imagen más positiva de los españoles que viceversa; además, presentan puntuaciones más altas tanto en imagen exogrupal positiva como negativa. Los adolescentes con mayor contacto exogrupal presentan mejor imagen exogrupal total y positiva, pero los efectos sobre la negativa difieren en función del estatus del grupo (mayoritario o minoritario. El análisis de diferencias en función de la edad no ofrece resultados concluyentes. Los resultados de este estudio contribuyen a mejorar el conocimiento del fenómeno de la percepción intergrupal en la adolescencia, etapa evolutiva en la que los estudios en nuestro país son aún escasos.

  17. Landsat 7 ETM/1G satellite imagery - Hawaiian Islands cloud-free mosaics

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Cloud-free Landsat satellite imagery mosaics of the islands of the main 8 Hawaiian Islands (Hawaii, Maui, Kahoolawe, Lanai, Molokai, Oahu, Kauai and Niihau). Landsat...

  18. Global Human Built-up And Settlement Extent (HBASE) Dataset From Landsat

    Data.gov (United States)

    National Aeronautics and Space Administration — The Global Human Built-up And Settlement Extent (HBASE) Dataset from Landsat is a global map of HBASE derived from the Global Land Survey (GLS) Landsat dataset for...

  19. Using ecological zones to increase the detail of Landsat classifications

    Science.gov (United States)

    Fox, L., III; Mayer, K. E.

    1981-01-01

    Changes in classification detail of forest species descriptions were made for Landsat data on 2.2 million acres in northwestern California. Because basic forest canopy structures may exhibit very similar E-M energy reflectance patterns in different environmental regions, classification labels based on Landsat spectral signatures alone become very generalized when mapping large heterogeneous ecological regions. By adding a seven ecological zone stratification, a 167% improvement in classification detail was made over the results achieved without it. The seven zone stratification is a less costly alternative to the inclusion of complex collateral information, such as terrain data and soil type, into the Landsat data base when making inventories of areas greater than 500,000 acres.

  20. Kerr Reservoir LANDSAT experiment analysis for March 1981

    Science.gov (United States)

    Lecroy, S. R. (Principal Investigator)

    1982-01-01

    LANDSAT radiance data were used in an experiment conducted on the waters of Kerr Reservoir to determine if reliable algorithms could be developed that relate water quality parameters to remotely sensed data. A mix of different types of algorithms using the LANDSAT bands was generated to provide a thorough understanding of the relationships among the data involved. Except for secchi depth, the study demonstrated that for the ranges measured, the algorithms that satisfactorily represented the data encompass a mix of linear and nonlinear forms using only one LANDSAT band. Ratioing techniques did not improve the results since the initial design of the experiment minimized the errors against which this procedure is effective. Good correlations were found for total suspended solids, iron, turbidity, and secchi depth. Marginal correlations were discovered for nitrate and tannin + lignin. Quantification maps of Kerr Reservoir are presented for many of the water quality parameters using the developed algorithms.

  1. A Landsat study of water quality in Lake Okeechobee

    Science.gov (United States)

    Gervin, J. C.; Marshall, M. L.

    1976-01-01

    This paper uses multiple regression techniques to investigate the relationship between Landsat radiance values and water quality measurements. For a period of over one year, the Central and Southern Florida Flood Control District sampled the water of Lake Okeechobee for chlorophyll, carotenoids, turbidity, and various nutrients at the time of Landsat overpasses. Using an overlay map of the sampling stations, Landsat radiance values were measured from computer compatible tapes using a GE image 100 and averaging over a 22-acre area at each station. These radiance values in four bands were used to form a number of functions (powers, logarithms, exponentials, and ratios), which were then compared with the ground measurements using multiple linear regression techniques. Several dates were used to provide generality and to study possible seasonal variations. Individual correlations were presented for the various water quality parameters and best fit equations were examined for chlorophyll and turbidity. The results and their relationship to past hydrological research were discussed.

  2. Superfícies de resposta espectro-temporal de imagens do sensor MODIS para classificação de área de soja no Estado do Rio Grande do Sul Spectral-temporal response surface of MODIS sensor images for soybean area classification in Rio Grande do Sul State

    Directory of Open Access Journals (Sweden)

    Conrado de Moraes Rudorff

    2007-02-01

    Full Text Available Este trabalho objetivou avaliar o potencial e as limitações das imagens MODIS para classificação e estimativa de área de soja por meio do método de superfície de resposta espectro-temporal (Spectral-Temporal Response Surface - STRS. Um mapa temático das áreas com soja, oriundo da classificação de imagens Landsat do Estado do Rio Grande do Sul, foi utilizado como referência para auxiliar na orientação da amostragem dos pixels de treinamento e para a comparação dos resultados. Seis imagens compostas do sensor MODIS foram utilizadas para a classificação supervisionada da área de soja por meio do algoritmo de máxima verossimilhança (MAXVER adaptado ao método STRS. Os resultados foram avaliados pelo coeficiente Kappa para a totalidade da área em estudo e também para uma região de latifúndios e outra de minifúndios. O método STRS subestimou em 6,6% a área de soja para toda a região estudada, sendo que a estatística Kappa foi de 0,503. Para as regiões de latifúndios e minifúndios, a área de soja foi superestimada em 8% (Kappa=0,424 e subestimada em 43,4% (Kappa=0,358, respectivamente. As imagens MODIS, por meio do método STRS, demonstraram ter potencial para classificar a área de soja, principalmente em regiões de latifúndios. Em regiões de minifúndios, a correta identificação e classificação das áreas de soja mostrou-se pouco eficiente em razão da baixa resolução espacial das imagens MODIS.This paper was aimed at evaluating the potential and the limitations of MODIS images for soybean classification and area estimation through a Spectral-Temporal Response Surface (STRS method. A soybean thematic map from Rio Grande do Sul State, Brazil, derived from Landsat images was used as reference data to assist both sample training and results comparison. Six 16-day composite MODIS images were classified through a supervised maximum likelihood algorithm (MAXVER adapted to the STRS method. The results were

  3. Gestión comunicacional e imagen corporativa en la Universidad Nacional Abierta (UNA

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    Graciela Perozo de Jiménez

    2004-01-01

    Full Text Available El presente artículo tiene como objetivo determinar la imagen corporativa como herramienta de gestión comunicacional en la Universidad Nacional Abierta (UNA, de los Centros Locales: Táchira, Mérida, Trujillo, Lara, Falcón y Zulia. La investigación siguió la modalidad de trabajo de campo de tipo descriptiva, dentro del enfoque cuantitativo. La población estuvo constituida por 13.794 estudiantes y 138 miembros del personal académico de los centros locales del occidente del país, quedando la muestra conformada por 390 estudiantes y 103 miembros del personal académico. Como instrumento de recolección de datos se utilizaron 2 cuestionarios uno para cada muestra seleccionada con la finalidad de obtener información sobre la imagen corporativa en la UNA, a través de la dimensión:”necesidades en materia de comunicación y promoción”, los cuales se sometieron a validez de contenido por parte de diez (10 expertos y se calculó la confiabilidad obteniendo un coeficiente de 0,90 para ambos. Como técnica de análisis de datos se utilizó la estadística descriptiva, mediante distribución de frecuencias y medias aritméticas. Como resultado se determinó que la comunicación y la promoción tienen una tendencia media hacia una tendencia baja, por lo que las necesidades en materia de comunicación y promoción son muchas a fin de contar con una comunicación eficiente, clara y oportuna, que permita proyectar una imagen positiva de la Institución.

  4. ORIENTAÇÃO E ORTORRETIFICAÇÃO DE IMAGENS TERRESTRES NADIRAIS

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    Adilson Berveglieri

    Full Text Available Informações de controle terrestre são fundamentais para as aplicações fotogramétricas. Independentemente do tipo de controle utilizado, um passo interativo é ainda exigido para determinar as coordenadas imagem de pontos de apoio. Esta abordagem propõe uma técnica automática para orientar e ortorretificar imagens terrestres de pontos de apoio. As ortoimagens podem ser utilizadas como cenas de controle em algoritmos de correspondência para orientar imagens aéreas ou orbitais. O método emprega um alvo de controle acoplado a um receptor Global Navigation Satellite System (GNSS para o levantamento de pontos de apoio. Imagens dos pontos são coletadas em posição nadiral e em diferentes alturas com uma câmara panorâmica. Um modelo multiescala é gerado e orientado usando pontos de enlace e os cantos do alvo como pontos de apoio. As coordenadas 3D destes pontos de enlace são determinadas automaticamente por intersecção de raios. Um Modelo Digital de Terreno (MDT local é produzido para ortorretificar a área com centro no ponto de apoio. Experimentos foram realizados em pequenas áreas com variações em altitude. As coordenadas geradas automaticamente foram comparadas com amostras coletadas por medições topográficas, e os resultados demonstraram que as áreas foram reconstruídas com erro médio quadrático inferior a 2 cm em altimetria, o que é compatível com a aplicação proposta de geração de cenas de controle.

  5. Cuestiones centrales de la actual Filosofía de la imagen

    Directory of Open Access Journals (Sweden)

    Roberto Rubio

    2017-12-01

    Full Text Available Desde hace algunas décadas, se desarrolla en el ámbito germano-parlante un proyecto interdisciplinario enfocado en las imágenes. Se trata de la Bildwissenschaft o Ciencia de la imagen. Ella pretende integrar en un marco común el aporte de diversas disciplinas, tales como la historia del arte, la teoría del arte, la filosofía y la psicología, entre otras. El aporte de la filosofía al programa de la Bildwissenschaft ha dado lugar a la así denominada “filosofía de la imagen”. Ella es especialmente sensible a los intentos de renovación paradigmática que afectan de modo más o menos directo a la cuestión de la imagen, tales como el “giro performativo”, el “giro icónico” o el “giro medial”. A continuación, expondré dos cuestiones centrales en la filosofía de la imagen. Presentaré, en primer lugar, la pregunta por el estatuto exhibitorio de las imágenes, y en segundo lugar, la pregunta acerca de la condición medial de las imágenes. Luego de la exposición, ofreceré un análisis crítico de los debates correspondientes a tales cuestiones.

  6. La imagen corporal en los ancianos: Estudio descriptivo Body image in older: Descriptive studie

    Directory of Open Access Journals (Sweden)

    Carmen María Sarabia Cobo

    2012-03-01

    Full Text Available Estudio de corte transversal y descriptivo llevado a cabo en una residencia de mayores para la valoración de la imagen corporal (IC. Objetivo: determinar el autoconcepto de la imagen corporal en los mayores y la prevalencia de trastornos psiquiátricos asociados como depresión o anorexia. Sujetos y método: 198 mayores de 65 años procedentes de tres residencias. Se emplearon el Cuestionario BSQ (Body Shape Questionnarire y el test de Siluetas. Asimismo, se llevó a cabo una revisión sistemática de la historia clínica para detectar problemas psiquiátricos como depresión, ansiedad o anorexia nerviosa. Resultados: las personas con problemas psiquiátricos como depresión o ansiedad presentaron mayor insatisfacción con la imagen corporal, prevaleciendo en este caso las mujeres sobre los hombres, indiferentemente de la edad.Sectional study and descriptive conducted in a home for the elderly for the assessment of body image (CI. Objective: to determine the self-concept of Body Image in the elderly and the prevalence of associated psychiatric disorders such as depression or anorexia. Subjects and methods: 198 over 65 years, from three residences. Questionnaire were used BSQ (Body Shape Questionnarire and the Silhouettes test. Also carried out a systematic review of clinical history to detect psychiatric problems like depression, anxiety or anorexia nervosa. Results: people with psychiatric problems like depression or anxiety had higher body image dissatisfaction, to prevail in this case women over men, regardless of age.

  7. IMAGENS NO CALOR DA HORA OU A FÊNIX RENASCIDA DA IMAGEM DOCUMENTAL

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    Kati Caetano

    2008-12-01

    Full Text Available Apesar da freqüente discussão, tanto nos meios acadêmicos quanto nos midiáticos, envolvendo a crise da imagem documental, na esteira da propalada crise da cultura documental como um todo, não há como negar a proliferação de imagens e o incremento de uma produção assumida com esse propósito no universo das relações comunicacionais, seja ele impresso ou digital. Se, no domínio da arte, a ação hegemônica contemporânea consiste na desestabilização figurativa das imagens, do lado das mídias de produção massiva, afirma-se a sua estabilização como condiçãofundante do ato de documentar. Este trabalho não visa abordar as várias concepções de documental, porque parte do pressuposto de que esse aspecto se apresenta como resultado de estratégias figurativo-enunciativas de “fazer crer”, responsáveis por múltiplos regimes de sentido. De suas escolhas e agenciamentos decorrem modalidades interacionais amparadas na mediatez ou imediatez dos processos compreensivos, num sistema de valores condicionantes do ato comunicativo que coloca em evidência as funções prática, cognitiva, afetiva ou fiduciária (calcada em regimes de crençadas mediações simbólicas. A questão mais geral que norteia opresente texto é indagar como as diferentes mídias, do fotográfico ao virtual, operam com essas imagens e que tipos de implicações comunicacionais promovem.

  8. Imagens no calor da hora ou a Fênix renascida da imagem documental

    Directory of Open Access Journals (Sweden)

    Kati Caetano

    2008-12-01

    Full Text Available Apesar da freqüente discussão, tanto nos meios acadêmicos quanto nos midiáticos, envolvendo a crise da imagem documental, na esteira da propalada crise da cultura documental como um todo, não há como negar a proliferação de imagens e o incremento de uma produção assumida com esse propósito no universo das relações comunicacionais, seja ele impresso ou digital. Se, no domínio da arte, a ação hegemônica contemporânea consiste na desestabilização figurativa das imagens, do lado das mídias de produção massiva, afirma-se a sua estabilização como condição fundante do ato de documentar. Este trabalho não visa abordar as várias concepções de documental, porque parte do pressuposto de que esse aspecto se apresenta como resultado de estratégias figurativo-enunciativas de “fazer crer”, responsáveis por múltiplos regimes de sentido. De suas escolhas e agenciamentos decorrem modalidades interacionais amparadas na mediatez ou imediatez dos processos compreensivos, num sistema de valores condicionantes do ato comunicativo que coloca em evidência as funções prática, cognitiva, afetiva ou fiduciária (calcada em regimes de crença das mediações simbólicas. A questão mais geral que norteia o presente texto é indagar como as diferentes mídias, do fotográfico ao virtual, operam com essas imagens e que tipos de implicações comunicacionais promovem.

  9. Imagen país de Colombia desde la perspectiva extranjera

    Directory of Open Access Journals (Sweden)

    Echeverri Cañas, Lina María

    2015-06-01

    Full Text Available Colombia is a country with a negative historical positioning in international markets. Despite efforts by governments and influencers to improve its image, the perception of foreigners remains polarized, being associated with coffee and drug trafficking. This article is the result of a qualitative research conducted on foreign visitors from eight countries in the Americas with the largest number of visitors to Colombia in 2013: The United States, Venezuela, Ecuador, Argentina, Peru, Brazil, Mexico and Chile. The study found that the image of Colombia is not one-dimensional, but multidimensional. It identifies five dimensions that influence country image: knowledge of the country, the industrial orientation, visitor attitudes, perceptions of prospects and preferences and finally interests associated with its image.Colombia es un país con un posicionamiento histórico negativo en mercados internacionales. Si bien los gobiernos y los prescriptores han dedicado esfuerzos por mejorarla, la percepción del extranjero se mantiene polarizada, es decir, todavía el país es asociado con el café y con el narcotráfico. El presente artículo es el resultado de una investigación cualitativa realizada a extranjeros procedentes de ocho países que registran el mayor número de visitantes en Colombia en el 2013 desde el continente americano: Estados Unidos, Venezuela, Ecuador, Argentina, Perú, Brasil, México y Chile. Como resultado del estudio se encontró que la imagen de Colombia no es unidimensional, es multidimensional. Se logran identificar cinco dimensiones que influyen en la imagen país: el conocimiento del país, la orientación industrial, las actitudes de los visitantes, las percepciones de los prospectos y las preferencias e intereses asociado a su imagen.

  10. Harmonic regression of Landsat time series for modeling attributes from national forest inventory data

    Science.gov (United States)

    Barry T. Wilson; Joseph F. Knight; Ronald E. McRoberts

    2018-01-01

    Imagery from the Landsat Program has been used frequently as a source of auxiliary data for modeling land cover, as well as a variety of attributes associated with tree cover. With ready access to all scenes in the archive since 2008 due to the USGS Landsat Data Policy, new approaches to deriving such auxiliary data from dense Landsat time series are required. Several...

  11. Uma ninfa a perseguir cabeças: imagens de Salomé na coluna Garotas do Alceu

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    Daniela Queiroz Campos

    Full Text Available Resumo O presente artigo aborda as temporalidades das imagens da coluna Garotas do Alceu da revista O Cruzeiro. As pin-ups ilustradas por Alceu Penna para a coluna Garotas foram imagens permeadas de publicidades, comportamentos, morais e modas em voga em seu tempo histórico de produção. Contudo, segundo Georges Didi-Huberman, a imagem pertence ao tempo. Tempos múltiplos, impuros, heterogêneos, dialéticos, anacrônicos também perpassam as imagens da coluna em questão. Nas páginas que seguem as Garotas do Alceu, as pin-ups, foram também analisadas como ninfas modernas que associam o belo ao trauma. Entre as Garotas e as ninfas, as apresentações de Salomé e das cabeças decapitadas foram aqui destacadas e analisadas.

  12. Relating LANDSAT ETM+ and forest inventory data for mapping successional stages in a tropical wet forest / Relacionando LANDSAT ETM+ e dados de inventário florestal para mapeamento estádios sucessionais em uma floresta tropical úmida

    Directory of Open Access Journals (Sweden)

    Fábio G. Gonçalves

    2010-10-01

    Full Text Available AbstractIn this study, we test whether an existing classification technique based on the integration of LANDSAT ETM+ and forest inventory data enables detailed characterization of successional stages in a tropical wet forest site. The specific objectives were: (1 to map forest age classes across the La Selva Biological Station in Costa Rica; and (2 to quantify uncertainties in the proposed approach in relation to field data and existing vegetation maps. Although significant relationships between vegetation hight entropy (a surrogate for forest age and ETM+ data were detected, the classification scheme tested in this study was not suitable for characterizing spatial variation in age at La Selva, as evidenced by the error matrix and the low Kappa coefficient (0.129. Factors affecting the performance of the classification at this particular study site include the smooth transition in vegetation structure between intermediate and late successional stages, and the low sensitivity of NDVI to variations in vertical structure at high biomass levels. ResumoNesse estudo, testamos se uma técnica de classificação existente, baseada na integração de imagens LANDSAT ETM+ e os dados de inventário florestal, permite a caracterização detalhada dos estádios sucessionais em uma área de floresta tropical úmida. Os objetivos específicos foram: (1 mapear classes de idade florestal na Estação Biológica La Selva, na Costa Rica, e (2 quantificar as incertezas da abordagem proposta em relação aos dados de campo e mapas de vegetação existente. Apesar de terem sido detectadas relações significativas entre dados ETM+ e medidas de entropia da altura da vegetação (um substituto para a idade florestal o sistema de classificação testados nesse estudo não se demonstrou adequado para caracterizar a variação espacial em idade em La Selva, como evidenciado pela matriz de erro e o baixo coeficiente Kappa (0,129. Fatores que afetam o desempenho da

  13. Principles of computer processing of Landsat data for geologic applications

    Science.gov (United States)

    Taranik, James V.

    1978-01-01

    The main objectives of computer processing of Landsat data for geologic applications are to improve display of image data to the analyst or to facilitate evaluation of the multispectral characteristics of the data. Interpretations of the data are made from enhanced and classified data by an analyst trained in geology. Image enhancements involve adjustments of brightness values for individual picture elements. Image classification involves determination of the brightness values of picture elements for a particular cover type. Histograms are used to display the range and frequency of occurrence of brightness values. Landsat-1 and -2 data are preprocessed at Goddard Space Flight Center (GSFC) to adjust for the detector response of the multispectral scanner (MSS). Adjustments are applied to minimize the effects of striping, adjust for bad-data lines and line segments and lost individual pixel data. Because illumination conditions and landscape characteristics vary considerably and detector response changes with time, the radiometric adjustments applied at GSFC are seldom perfect and some detector striping remain in Landsat data. Rotation of the Earth under the satellite and movements of the satellite platform introduce geometric distortions in the data that must also be compensated for if image data are to be correctly displayed to the data analyst. Adjustments to Landsat data are made to compensate for variable solar illumination and for atmospheric effects. GeoMetric registration of Landsat data involves determination of the spatial location of a pixel in. the output image and the determination of a new value for the pixel. The general objective of image enhancement is to optimize display of the data to the analyst. Contrast enhancements are employed to expand the range of brightness values in Landsat data so that the data can be efficiently recorded in a manner desired by the analyst. Spatial frequency enhancements are designed to enhance boundaries between features

  14. LANDSAT-D ground segment operations plan, revision A

    Science.gov (United States)

    Evans, B.

    1982-01-01

    The basic concept for the utilization of LANDSAT ground processing resources is described. Only the steady state activities that support normal ground processing are addressed. This ground segment operations plan covers all processing of the multispectral scanner and the processing of thematic mapper through data acquisition and payload correction data generation for the LANDSAT 4 mission. The capabilities embedded in the hardware and software elements are presented from an operations viewpoint. The personnel assignments associated with each functional process and the mechanisms available for controlling the overall data flow are identified.

  15. Landsat change detection can aid in water quality monitoring

    Science.gov (United States)

    Macdonald, H. C.; Steele, K. F.; Waite, W. P.; Shinn, M. R.

    1977-01-01

    Comparison between Landsat-1 and -2 imagery of Arkansas provided evidence of significant land use changes during the 1972-75 time period. Analysis of Arkansas historical water quality information has shown conclusively that whereas point source pollution generally can be detected by use of water quality data collected by state and federal agencies, sampling methodologies for nonpoint source contamination attributable to surface runoff are totally inadequate. The expensive undertaking of monitoring all nonpoint sources for numerous watersheds can be lessened by implementing Landsat change detection analyses.

  16. La publicidad en la creación y fortalecimiento de la imagen corporativa

    OpenAIRE

    Baena Eguía, Gala

    2013-01-01

    Trabajo Fin de Grado leído en la Universidad Rey Juan Carlos en el curso académico 2013/2014. Director/a: Cristina Ayala del Pino La publicidad es una herramienta comunicativa que utilizan las organizaciones con el fin de crear, consolidar o cambiar actitudes de las personas, para que sean favorables a su producto y/o marca. Contribuye a transmitir la identidad corporativa de las mismas, que se traduce en imagen para los públicos, aunque no es el único input que reciben para crearla. La pu...

  17. Una perspectiva desde la psicología de la salud de la imagen corporal

    OpenAIRE

    Raich, Rosa María

    2011-01-01

    En este trabajo se describen algunas definiciones y el concepto de imagen corporal y las preocupaciones exageradas acerca de sí mismo que pueden llegar a constituir el trastorno dismórfico. Se analizan las características clínicas de este trastorno, así como las quejas que sobre la apariencia son más frecuentes. Se estudia la relación de este trastorno con nivel de autoestima, identidad de  género, ansiedad interpersonal y depresión. Se hace un repaso a diferentes técnicas de evaluación y de ...

  18. Imagen de marca, consumidor y empresa. Un análisis de sus interacciones

    OpenAIRE

    Carlos A. J. Molinari

    2013-01-01

    El artículo, se propone describir las interacciones que se establecen entre el consumidor, la empresa y la construcción de una imagen de la marca. En este marco, se analizan los distintos formatos en los que las marcas se manifiestan en los mercados de consumo e industriales, así como los caminos alternativos hacia su trascendencia internacional. El marco teórico utilizado para el análisis, es el de la disciplina del marketing, pero desde una visión interdisciplinaria, que posibilita comprend...

  19. Aplicaciones Móviles: Mejorar la imagen corporativa de los aeropuertos y diferenciarlos ante la competencia

    OpenAIRE

    Florido-Benítez, Lázaro

    2017-01-01

    La imagen que proyectan los aeropuertos a través de sus apps afectan directa e indirectamente en la satisfacción del pasajero. Hoy día los aeropuertos compiten entre si para captar un mayor números de aerolíneas y pasajeros, con el objetivo de incrementar sus ingresos comerciales. Las aplicaciones aeroportuarias como herramienta de marketing están ofreciendo un abanico de oportunidades al binomio pasajero y aeropuerto. Si los aeropuertos quieren mejorar la experiencia del pasajero y diferenci...

  20. Aspectos controvertidos de la imagen corporal en los trastornos de la conducta alimentaria

    Directory of Open Access Journals (Sweden)

    ANA R. SEPÚLVEDA

    2004-01-01

    Full Text Available Este trabajo revisa los resultados de 31 estudios que evalúan de alguna forma la "alteración de la imagen corporal" en anorexia nerviosa y bulimia nerviosa a través de los métodos de evaluación perceptiva o los métodos de evaluación actitudinal. Los estudios presentan en la mayoría de los casos resultados contradictorios entre ellos. Los autores ofrecen una serie de explicaciones metodológicas y meta-analíticas para tratar de interpretar los resultados.

  1. Quem fará a nossa Perestroika? Imagens de Mikhail Gorbatchev no jornal O Globo

    Directory of Open Access Journals (Sweden)

    Izabel Cristina Gomes da Costa

    2008-01-01

    Full Text Available Quem fará a nossa Perestroika? Esta surpreendente pergunta foi feita por O Globo em 1988. Mais desconcertante ainda: a publicação utilizou-se das reformas na União Soviética (URSS de Mikhail Gorbatchev para defender uma visão de mundo e um projeto político para o Brasil. O presente artigo identifica as estratégias elaboradas pelo jornal na construção das imagens do dirigente soviético. Delineando quatro momentos, elas revelaram as mudanças no seu perfil durante a crise do socialismo real.

  2. Modelos de correção geométrica para imagens HRV - SPOT

    OpenAIRE

    Antônio José Ferreira Machado e Silva

    1988-01-01

    A correção geométrica apresenta-se como uma ferramenta extremamente importante nas diversas aplicações de Sensoriamento Remoto. Por este motivo, ela deve incluir o rol das tarefas que compõem o pré-processamento de imagens. A literatura apresenta diversos modelos matemáticos para este fim, bem como modelos para refinar a correção geométrica. Esta dissertação busca apresentar, analisar e comparar alguns métodos de correção geométrica, procurando estudar a relação entre custos computacionais e ...

  3. Caminha, Meirelles, e Mauro : narrativas do (re) descobrimento do Brasil; decifrando as imagens do paraiso

    OpenAIRE

    Carolina Cavalcanti Bezerra

    2008-01-01

    Resumo: Essa dissertação tem como propositura uma nova leitura sobre o descobrimento do Brasil através das imagens/representações do Paraíso na Terra. A permanência dessa imagem no imaginário coletivo foi a base para o desenvolvimento dessa dissertação, partindo dos seguintes documentos: a Carta de Caminha sobre o descobrimento do Brasil (1500), o quadro A Primeira Missa no Brasil de Meirelles (1860/1) e O Descobrimento do Brasil (1937), filme de Humberto Mauro. A presente incursão pelas narr...

  4. Biologia: educação e imagens Biology: education and illustrations

    Directory of Open Access Journals (Sweden)

    Cristina Bruzzo

    2004-12-01

    Full Text Available Este texto aborda a presença do desenho na educação e divulgação em biologia na obra dos naturalistas nos séculos XVIII e XIX. Estas considerações pretendem estimular uma discussão sobre a possibilidade de as imagens fornecerem uma compreensão singular do mundo natural.The present material shows the presence of the illustration in education and popularization of biology on the work of naturalists in the XVIIIth and XIXth centuries. These thoughts are intended to stimulate discussion on the possibility of images supplying a unique comprehension of natural world.

  5. CARACTERIZACION MORFOMETRICA DE LA GERMINACION DE CHLORAEA CRISPA LINDL. (ORCHIDACEAE) USANDO UN ANALISIS DE IMAGEN

    OpenAIRE

    Verdugo, Gabriela; Marchant, Jorge; Cisternas, Mauricio; Calderón, Ximena; Peñaloza, Patricia

    2007-01-01

    Mediante la técnica de análisis de imagen se evaluó las etapas de germinación de un lote de semillas de Chloraea crispa Lindl. Se pudo observar las cuatro etapas de germinación propuestas por Mitchell. La etapa cero corresponde a semillas sin germinar, éstas son alargadas, curvadas en uno de sus extremos, y alcanzan un largo promedio de 0,5 mm. En la etapa uno se aprecia un incremento sólo en ancho debido al crecimiento del embrión, en la etapa dos hay cambios tanto en la forma como en el aum...

  6. Estudio de caso del Postgrado Comunicación e Imagen del IADE Lisboa

    OpenAIRE

    Pereira, María Helena Cardoso Simoes

    2006-01-01

    El Proceso de Bolonia ha creado huevas reglas para la uniformación de la Enseñanza Superior en la Europa, implantando nuevos paradigmas, entre los cuales está el aseguramiento de la calidad y la importancia de la formación a lo largo de la vida. El objetivo de este estudio se inserta en estas dos temáticas, pretendiendo saber si el curso de Postgrado en Comunicac ión e Imagen del IADE (Lisboa) administra una enseñanza de calidad. La metodología utilizada se basó en el modelo EFQM. Se auscultó...

  7. IMAGEN TURÍSTICA Y MEDIOS DE COMUNICACIÓN. Una construcción social

    OpenAIRE

    Gerardo Novo E. de los Monteros

    2012-01-01

    El presente artículo tiene por objetivo analizar la construcción de la imagen de los destinos turísticos tomando como marco teórico de referencia la teoría de sistemas de Niklas Luhmann. Particularmente se profundiza en el proceso de construcción de la realidad social que hace el sistema de los medios masivos de comunicación como el espacio donde se socializan los imaginarios que los turistas tienen con respecto de los destinos a partir de la información que se les presenta. Para explicar est...

  8. Nise da Silveira: imagens do inconsciente entre psicologia, arte e política

    Directory of Open Access Journals (Sweden)

    Frayze-Pereira João A.

    2003-01-01

    Full Text Available A HISTÓRIA de vida de Nise da Silveira é considerada à luz do complexo campo simbólico que sua obra de maior envergadura inaugurou na cultura brasileira - o Museu de Imagens do Inconsciente, campo de passagem entre o hospício e o mundo da arte. Neste artigo, este museu é analisado segundo os principais eixos que o articulam: o psicológico, o artístico e o político. É considerado o impacto da art brutt sobre o próprio criador marginal e sobre o olhar do espectador.

  9. La imagen de marca como elemento vertebrador del territorio. El caso andaluz

    OpenAIRE

    De-las-Heras-Pedrosa, Carlos; Jambrino-Maldonado, Carmen; Iglesias-Sánchez, Patricia Pilar

    2014-01-01

    Andalucía siempre se ha caracterizado por formar parte del selecto grupo de comunidades autónomas que atraen la mayoría de turistas que llegan a nuestro país, pero no siempre fue la marca Andalucía la imagen de nuestra comunidad autónoma. Sevilla, Granada, Córdoba, Costa del Sol, Costa de la Luz, entre otras, fueron durante muchos años las marcas que proyectaban al exterior cada una de nuestras provincias. Con una política de comunicación bien diferenciadas cada ciudad, cada destino realizaba...

  10. La importancia de la comunicación no verbal en la configuración de la imagen corporativa

    Directory of Open Access Journals (Sweden)

    Carlos Fanjul Peyró

    2012-04-01

    Full Text Available La creación de una imagen corporativa sólida, fuerte y positiva supone un trabajo de enriquecimiento constante de los valores y principios de base que definen la realidad de una organización, a los cuales debe ser fiel en todas sus manifestaciones comunicativas. Los componentes no verbales que rodean o configuran cualquiera de estas manifestaciones, emergen como piezas clave en la construcción de imagen, dado el peso pragmático de los mismos dentro del proceso sistémico que implica la formación del principal intangible corporativo.

  11. Modelo para gestionar la sustentabilidad de las organizaciones a través de la rentabilidad, adaptabilidad e imagen

    OpenAIRE

    Miguel Blázquez; María Florencia Peretti

    2012-01-01

    El presente artículo tiene por objetivo presentar una herramienta denominada hexágono de imagen que, junto con la herramienta de los hexágonos de utilidad-rentabilidad, desarrollada anteriormente, pretende servir de soporte a la gestión de la sustentabilidad, en pos de lograr un equilibrio dinámico entre ambos aspectos: rentabilidad e imagen. La metodología empleada comprende una síntesis del marco teórico de la investigación, consistente en una revisión bibliográfica y posterior propuesta so...

  12. Apropiación por la mirada, La paradoja de la "huella digital" en la imagen fotográfica

    OpenAIRE

    Vélez Salazar, Gabriel Mario

    2003-01-01

    La imagen fotográfica, por la forma como se produce su génesis técnica, se ha relacionado con la huella y el efecto indicial que supone . No obstante con la llegada de la imagen digital y el cambio de naturaleza asociado, ¿es acaso posible sostener mismo principio? The photographical image, because of the way its technical genesis is produced, has been related with the prints and the sign effects it supposes. Nonetheless, with the arrival of the digital image and the nature change as...

  13. Influencia de la imagen corporal y la autoestima en la experiencia sexual de estudiantes universitarias sin trastornos alimentarios

    OpenAIRE

    María Calado Otero; María Lameiras Fernández; Yolanda Rodríguez Castro

    2004-01-01

    En este estudio se evalúa la relación que tienen diversas variables de la imagen corporal cognitivas (miedo a ganar peso, distorsión de la imagen corporal e insatisfacción corporal) y perceptivas (índice de masa corporal y autopercepción de atractivo) junto con la autoestima sobre la actividad sexual (nivel de experiencia sexual y actividad sexual en la actualidad, edad de la primera relación sexual coital, número de parejas sexuales coitales y satisfacción de las relaciones se...

  14. Edén: relato, imagen y proyecto. El concepto de paraíso terrenal como generador de arquitecturas

    OpenAIRE

    Casha Vida, Stephanie

    2016-01-01

    Esta tesis, Edén: relato, imagen y proyecto. El concepto de Paraíso terrenal como generador de arquitecturas se realiza con el objetivo de estudiar los vínculos entre la idea de Edén, o Paraíso y la arquitectura. Siempre trabajando desde los tres niveles de representación, relato, imagen y proyecto. En la aproximación al objeto de estudio, se procede a estudiar el relato en sí, y se hallan, en la forma misma del relato, unas implicaciones relacionadas con el mundo mitológico y arquetípico. E...

  15. Contribuciones del protocolo a la creación de la imagen de las autoridades en España

    OpenAIRE

    Cuadrado Esclapez, Carmen

    2017-01-01

    El propósito de esta investigación es demostrar cómo el protocolo, elemento decisivo para alcanzar los objetivos comunicacionales de los objetos sobre los que opera –los actos públicos–, contribuye a la construcción de la imagen pública del sujeto protagonista de esos actos. La creación y transmisión de una determinada imagen mediática en coherencia con unos objetivos previamente definidos requiere un plan de comunicación estratégico, del cual el protocolo es parte fundamental. El protocolo s...

  16. Tecnología y estética. Los motion graphics como exponente de la imagen interfaz

    OpenAIRE

    Ràfols Cabrisses, Rafael

    2016-01-01

    El objeto de estudio de esta tesis son los motion graphics (MG), el género audiovisual nacido con la tecnología audiovisual digital y que es resultado de la introducción de la cultura gráfica en la imagen en movimiento. Es un formato que incorpora desde expresiones netamente artísticas hasta aquellas que con carácter funcional constituyen el diseño audiovisual. Sus formatos más característicos son: los títulos de crédito de las películas, la publicidad, los videoclips, la imagen de los canale...

  17. Tecnología y estética los motions graphics como como exponente de la imagen interfaz /

    OpenAIRE

    Ràfols Cabrisses, Rafael

    2016-01-01

    El objeto de estudio de esta tesis son los motion graphics (MG), el género audiovisual nacido con la tecnología audiovisual digital y que es resultado de la introducción de la cultura gráfica en la imagen en movimiento. Es un formato que incorpora desde expresiones netamente artísticas hasta aquellas que con carácter funcional constituyen el diseño audiovisual. Sus formatos más característicos son: los títulos de crédito de las películas, la publicidad, los videoclips, la imagen de los canale...

  18. Regímenes de poder y tecnologías de la imagen. Foucault y los estudios visuales

    OpenAIRE

    León Mantilla, Christian Manuel

    2014-01-01

    Este ensayo analiza los legados del pensamiento de Michel Foucault para el estudio de las prácticas visuales, la mirada y las tecnologías de la imagen. A partir la recepción de Foucault en el campo de los estudios visuales, me interesa reflexionar sobre cómo la imagen y la mirada se inscriben dentro de una red de relaciones, saberes, tecnologías, normativas e instituciones que develan formas de operación del poder y de construcción de los sujetos. Para empezar, pongo en diálogo conceptos como...

  19. Las webs de las comunidades autónomas: Imagen corporativa y servicios

    Directory of Open Access Journals (Sweden)

    Fernando Sabés Turmo

    2012-04-01

    Full Text Available Este artículo ofrece un análisis de los portales web institucionales de las Comunidades Autónomas españolas, unas páginas en las que la comunicación corporativa se une a la necesidad de prestar servicios a los ciudadanos. Además, no hay que olvidar que la aprobación de la Ley 11/2007, de 22 de junio, de acceso electrónico de los ciudadanos a los Servicios Públicos, supone una auténtica revolución en cuanto a la oferta de servicios desde estos portales. Estas páginas se convierten en la puerta de entrada de los ciudadanos a las Instituciones y suponen un elemento vital en la imagen que desde ellas se quiere proyectar. De todos modos, estamos ya en una fase mucho más avanzada, en la que la imagen corporativa ha de ir de la mano con los servicios de e-Administración que se deben ir implementando en todas las Instituciones públicas.

  20. Children use in sensationalist pictures O uso de crianças em imagens sensacionalistas

    Directory of Open Access Journals (Sweden)

    Paulo Cesar Boni

    2005-11-01

    Full Text Available This work covers the production and use of sensationalist images of violence though the media, mainly those which include children, and focus on the variables which influence their wide consumption by the public. A case study is drawn over the photographic report on the terrorist attack occurred in Beslan, Russia, as published by Veja. It historically explains how violent images may have an impact on society and finds theoretical approaches and the psychological and market determinants which foster the obsession towards horror. Este trabalho aborda a produção e uso de imagens sensacionalistas de violência pela mídia, principalmente as que incluem crianças, e observa as variáveis que propiciam seu amplo consumo pelo público. Faz um estudo de caso da reportagem fotográfica sobre o ataque terrorista acontecido em Beslan, na Rússia, publicada pela Veja. Verifica historicamente como as imagens violentas de crianças podem impactar a sociedade e busca referenciais teóricos e condicionantes psicológicos e mercadológicos que impulsionam a obsessão pelo horror.

  1. LA IMAGEN DE SANTIAGO DE COMPOSTELA EN EL MERCADO TURÍSTICO ITALIANO

    Directory of Open Access Journals (Sweden)

    Lucrezia Lopez

    2009-01-01

    Full Text Available El sector turístico se está convirtiendo en uno de los sectores económicos más importantes en la economía gallega y compostelana. Durante los últimos años se han desarrollado nuevas y exitosas políticas turísticas para diversificar la oferta turística de Santiago y al mismo tiempo para renovar su imagen. En la actualidad, Santiago deja de ser sólo meta religiosa o de peregrinaje, y la presencia turística es cada vez más internacional; por su parte las motivaciones de viaje se van diversificando. Para comprobar el éxito de estas políticas hacia el exterior, el presente trabajo toma en consideración la imagen que la ciudad de Santiago proyecta hacia el mercado italiano (uno de los más importantes en la actualidad gracias a un trabajo de campo mediante encuestas y entrevistas dirigido a los turistas italianos en Santiago.

  2. A CIDADE VERDE, IMAGENS E DISCURSOS: O CASO DE MARINGÁ (PR BRASIL

    Directory of Open Access Journals (Sweden)

    Marcos Clair BOVO

    2012-12-01

    Full Text Available A presente pesquisa tem como propósito/intenção apresentar uma breve reflexão referente à imagem da “cidade verde” que predomina no município de Maringá-PR, destacando a concepção de cidade jardim, as imagens e os discursos que vinculam na mídia, seguidas das principais propostas implantadas no município referente à legislação ambiental. Desta forma buscamos investigar a ação do marketing “Maringá Cidade Verde”, por meio das propagandas, reportagens de revistas de circulação nacional, e dos discursos vinculados pelo poder público referente à imagem e a forma urbana dos projetos que estimulam a valorização imobiliária da cidade de Maringá. As imagens produzidas aparecem com intencionalidades específicas utilizando principalmente suas áreas verdes como ícones de divulgação, ou seja, os parques, as praças e suas amplas ruas arborizadas como sinônimo de qualidade ambiental.

  3. Circo tradicional en Chile. Forma de vida y la imagen del arte

    Directory of Open Access Journals (Sweden)

    Milenko Lasnibat

    2017-01-01

    Full Text Available A pesar de sus peculiaridades, suele pensarse que el circo es un arte como el teatro o la danza. Bajo esta consideración, surge la tentación de utilizar la imagen del arte par a asir lo que ocurre en el circo tradicional. En el presente artículo esa tentación se pone en cuestión mediante la descripción de algunos rasgos relativos a la forma de vida de quienes pertenecen al circo tradicional en Chile. Con ello, mi objetivo no es confrontar el uso que con fines prácticos pueda hacerse de la afinidad que existe entre el circo y el arte, sino mostrar los límites que tiene la imagen del arte al momento de aproximarse al circo tradicional con intereses cognoscitivos. A partir de esa di scusión, se sostiene que una manera más adecuada de entender las dinámicas relativas al circo tradicional radica en la figura del gremio.

  4. Hábitos alimentarios e imagen corporal en estudiantes universitarios sin trastornos alimentarios

    Directory of Open Access Journals (Sweden)

    María Lameiras Fernández

    2003-01-01

    Full Text Available Actualmente los adolescentes manifiestan su afinidad hacia una determinada estética corporal impuesta por la sociedad contemporánea; esto hace que los más jóvenes presenten una preocupación excesiva por su cuerpo y lleven a cabo conductas de riesgo para el desarrollo de trastornos de la conducta alimentaria. En esta investigación se entrevista a 482 estudiantes universitarios/as a los que se les aplica el Eating Disorders Inventory (EDI y un cuestionario sobre comportamientos alimentarios e imagen corporal. Los resultados muestran la mayor preocupación de las mujeres por el peso y la imagen corporal, siendo ellas además las que en mayor medida recurren a las dietas para alcanzar el peso ideal. Siendo el colectivo de chicas las que presentan en mayor medida tanto variables cognoscitivas como comportamentales de riesgo para el desarrollo de trastornos de la conducta alimentaria, lo que justifica la necesidad de implementar programas de prevención al colectivo de estudiantes universitarias. Se trata de un estudio descriptivo mediante encuestas con diseño transversal.

  5. Imagen país de Colombia desde la perspectiva estadounidense

    Directory of Open Access Journals (Sweden)

    Lina María Echeverri

    2014-01-01

    Full Text Available La reputación de los países está vinculada a la percepción que tengan los visitantes sobre un destino específico, se construye sobre sus experiencias y da como resultado el concepto de imagen de un país. Autores como Anholt, Dinnie y Kotler han logrado evaluar y analizar la importancia que está cobrando el contenido sobre imagen país en el diseño de estrategias de reputación territorial. En el caso de Colombia, el país tiene un posicionamiento polarizado, se asocia con narcotráfico y con café. El presente artículo expone los resultados de una investigación empírica aplicada en Estados Unidos, sobre las impresiones del país que tienen aquellos que han visitado y no han visitado a Colombia. La hipótesis planteada es que Colombia mantiene un posicionamiento histórico negativo, asociado al narcotráfico. Se eligió como ámbito geográfico a Estados Unidos, por ser el emisor más grande de viajeros hacia Colombia.

  6. VER PARA CRER: A ARTE DE OLHAR E A FILOSOFIA DAS IMAGENS

    Directory of Open Access Journals (Sweden)

    Eduardo Pellejero

    2015-07-01

    Full Text Available Retomada de forma dogmática, a tematizaçãoplatónica da pintura projeta sobre a produção e a contemplaçãode imagens atributos de irrealidade, irracionalidade epassividade, fazendo do olhar o oposto de conhecer e o opostode atuar, uma aceitação acrítica das aparências, coisa decrianças. O presente artigo pretende problematizar essa tradiçãoiconoclasta, colocando em causa os seus pressupostos filosóficose explorando a potência das imagens da arte e do olhar crítico.Dialogando com as obras de Merleau-Ponty, Berger, Damish,Didi-Huberman, Manguel e Rancière, aspira a mostrar que osolhares do pintor e do espectador estão longe de deixar-sereduzir às simplificações platónicas, dando lugar a uma dialéticacrítica e criativa que desconhece qualquer distinção entreaparência e realidade, entre passividade e atividade, e, emúltima instância, entre interpretar e transformar o mundo.

  7. North American forest disturbance mapped from a decadal Landsat record

    Science.gov (United States)

    Jeffrey G. Masek; Chengquan Huang; Robert Wolfe; Warren Cohen; Forrest Hall; Jonathan Kutler; Peder. Nelson

    2008-01-01

    Forest disturbance and recovery are critical ecosystem processes, but the spatial pattern of disturbance has never been mapped across North America. The LEDAPS (Landsat Ecosystem Disturbance Adaptive Processing System) project has assembled a wall-to-wall record of stand-clearing disturbance (clearcut harvest, fire) for the United States and Canada for the period 1990-...

  8. OHIO RIVER WATER QUALITY ASSESSMENT USING LANDSAT-7 DATA

    Science.gov (United States)

    The objectives of this project were (1) to develop a universal index for measuring Turbidity and Chlorophyll-A from remote sensing data and (2) to correlate satellite image parameters from Landsat-7 data with field measurements of water quality for five parameters: Chlorophyll-A ...

  9. United States forest disturbance trends observed with landsat time series

    Science.gov (United States)

    Jeffrey G. Masek; Samuel N. Goward; Robert E. Kennedy; Warren B. Cohen; Gretchen G. Moisen; Karen Schleweiss; Chengquan. Huang

    2013-01-01

    Disturbance events strongly affect the composition, structure, and function of forest ecosystems; however, existing US land management inventories were not designed to monitor disturbance. To begin addressing this gap, the North American Forest Dynamics (NAFD) project has examined a geographic sample of 50 Landsat satellite image time series to assess trends in forest...

  10. landsat remote sensing data as an alternative approach

    African Journals Online (AJOL)

    Mgina

    The use of Landsat data in this area has revealed the need of effective use of these data in ... and efficient in all aspects of cost. ... Removal of noise and cloud cover effects can well be ... approximatelly1000 km from the business city of Dar es ...

  11. Temporal validation for landsat-based volume estimation model

    Science.gov (United States)

    Renaldo J. Arroyo; Emily B. Schultz; Thomas G. Matney; David L. Evans; Zhaofei Fan

    2015-01-01

    Satellite imagery can potentially reduce the costs and time associated with ground-based forest inventories; however, for satellite imagery to provide reliable forest inventory data, it must produce consistent results from one time period to the next. The objective of this study was to temporally validate a Landsat-based volume estimation model in a four county study...

  12. Spectral Unmixing Analysis of Time Series Landsat 8 Images

    Science.gov (United States)

    Zhuo, R.; Xu, L.; Peng, J.; Chen, Y.

    2018-05-01

    Temporal analysis of Landsat 8 images opens up new opportunities in the unmixing procedure. Although spectral analysis of time series Landsat imagery has its own advantage, it has rarely been studied. Nevertheless, using the temporal information can provide improved unmixing performance when compared to independent image analyses. Moreover, different land cover types may demonstrate different temporal patterns, which can aid the discrimination of different natures. Therefore, this letter presents time series K-P-Means, a new solution to the problem of unmixing time series Landsat imagery. The proposed approach is to obtain the "purified" pixels in order to achieve optimal unmixing performance. The vertex component analysis (VCA) is used to extract endmembers for endmember initialization. First, nonnegative least square (NNLS) is used to estimate abundance maps by using the endmember. Then, the estimated endmember is the mean value of "purified" pixels, which is the residual of the mixed pixel after excluding the contribution of all nondominant endmembers. Assembling two main steps (abundance estimation and endmember update) into the iterative optimization framework generates the complete algorithm. Experiments using both simulated and real Landsat 8 images show that the proposed "joint unmixing" approach provides more accurate endmember and abundance estimation results compared with "separate unmixing" approach.

  13. Landsat's role in ecological applications of remote sensing.

    Science.gov (United States)

    Warren B. Cohen; Samuel N. Goward

    2004-01-01

    Remote sensing, geographic information systems, and modeling have combined to produce a virtual explosion of growth in ecological investigations and applications that are explicitly spatial and temporal. Of all remotely sensed data, those acquired by landsat sensors have played the most pivotal role in spatial and temporal scaling. Modern terrestrial ecology relies on...

  14. An algorithm to retrieve Land Surface Temperature using Landsat-8 ...

    African Journals Online (AJOL)

    Ayodeji Ogunode;Mulemwa Akombelwa

    The results show temperature variation over a long period of time can be ... Remote sensing of LST using infrared radiation gives the average surface temperature of the scene ... advantage over previous Landsat series. ..... Li, F., Jackson, T. J., Kustas, W. P., Schmugge, T. J., French, A. N., Cosh, M. H. & Bindlish, R. 2004.

  15. Sun position calculator (SPC) for Landsat imagery with geodetic latitudes

    Science.gov (United States)

    Seong, Jeong C.

    2015-12-01

    Landsat imagery comes with sun position information such as azimuth and sun elevation, but they are available only at the center of a scene. To aid in the use of Landsat imagery for various solar radiation applications such as topographic correction, solar power, urban heat island, agriculture, climate and vegetation, it is necessary to calculate the sun position information at every pixel. This research developed a PC application that creates sun position data layers in ArcGIS at every pixel in a Landsat scene. The SPC program is composed of two major routines - converting universal transverse Mercator (UTM) projection coordinates to geographic longitudes and latitudes, and calculating sun position information based on the Meeus' routine. For the latter, an innovative method was also implemented to account for the Earth's flattening on an ellipsoid. The Meeus routine implemented in this research showed about 0.2‧ of mean absolute difference from the National Renewable Energy Laboratory (NREL) Solar Position Algorithm (SPA) routine when solar zenith and azimuth angles were tested with every 30 min data at four city locations (Fairbanks, Atlanta, Sydney and Rio Grande) on June 30, 2014. The Meeus routine was about ten times faster than the SPA routine. Professionals who need the Sun's position information for Landsat imagery will benefit from the SPC application.

  16. Harmonized Landsat/Sentinel-2 Reflectance Products for Land Monitoring

    Science.gov (United States)

    Masek, J. G.; Ju, J.; Claverie, M.; Vermote, E.; Dungan, J. L.; Roger, J. C.; Skakun, S.; Justice, C. O.

    2017-12-01

    Many land applications require more frequent observations than can be obtained from a single "Landsat class" sensor. Agricultural monitoring, inland water quality assessment, stand-scale phenology, and numerous other applications all require near-daily imagery at better than 1ha resolution. Thus the land science community has begun expressing a desire for a "30-meter MODIS" global monitoring capability. One cost-effective way to achieve this goal is via merging data from multiple, international observatories into a single virtual constellation. The Harmonized Landsat/Sentinel-2 (HLS) project has been working to generate a seamless surface reflectance product by combining observations from USGS/NASA Landsat-8 and ESA Sentinel-2. Harmonization in this context requires a series of radiometric and geometric transforms to create a single surface reflectance time series agnostic to sensor origin. Radiometric corrections include a common atmospheric correction using the Landsat-8 LaSRC/6S approach, a simple BRDF adjustment to constant solar and nadir view angle, and spectral bandpass adjustments to fit the Landsat-8 OLI reference. Data are then resampled to a consistent 30m UTM grid, using the Sentinel-2 global tile system. Cloud and shadow masking are also implemented. Quality assurance (QA) involves comparison of the output 30m HLS products with near-simultaneous MODIS nadir-adjusted observations. Prototoype HLS products have been processed for 7% of the global land area using the NASA Earth Exchange (NEX) compute environment at NASA Ames, and can be downloaded from the HLS web site (https://hls.gsfc.nasa.gov). A wall-to-wall North America data set is being prepared for 2018.This talk will review the objectives and status of the HLS project, and illustrate applications of high-density optical time series data for agriculture and ecology. We also discuss lessons learned from HLS in the general context of implementing virtual constellations.

  17. Imagen y objetivos de la ciudad funcional: Conjuntos habitacionales modernos, Avda. Los Carrera, Concepción

    Directory of Open Access Journals (Sweden)

    Pablo Fuentes Hernández

    2011-11-01

    Este trabajo, trata sobre esta avenida, en la que durante el siglo XX, se ubicaron una importante cantidad de conjuntos habitacionales erigidos al amparo de los ideales del urbanismo funcionalista y determinados por instituciones estatales que promovieron la conformación de una imagen ideal de la ciudad moderna.

  18. Redes sociais, privacidade, confidencialidade e ética: a exposição de imagens de pacientes no facebook

    Directory of Open Access Journals (Sweden)

    Leandro Brambilla Martorell

    2016-03-01

    Full Text Available A pesquisa teve por objetivo estudar a exposição de imagens de pacientes promovida por médicos e cirurgiões-dentistas no facebook. A coleta dos dados foi feita entre os meses de agosto e setembro de 2013, selecionando-se, retrospectivamente, 39 imagens que haviam sido publicadas por 17 profissionais. Nestas imagens foi possível identificar situações de quebra de confidencialidade e/ou privacidade. O princípio do respeito à privacidade e confidencialidade das pessoas faz parte dos principais documentos internacionais relacionados com o campo da ética. Tanto o Estado como as entidades profissionais têm a obrigação de proteger vítimas da exposição de imagens que comprometam o direito inalienável à privacidade. O estudo reforça que tais exposições trazem repercussões negativas para pacientes, profissionais de saúde e sociedade. Recomenda-se que o tema seja abordado transversalmente pelo corpo docente, com discussões estimuladas e orientadas pelas disciplinas de Bioética.

  19. Evaluación de la imagen organizacional universitaria en una institución de educación superior

    Directory of Open Access Journals (Sweden)

    Juana Patlán Pérez

    2017-01-01

    Full Text Available La imagen organizacional es importante para muchas instituciones de educación superior por encontrarse en un entorno ampliamente competitivo que demanda servicios educativos de calidad. El propósito de esta investigación fue evaluar la imagen organizacional universitaria en una institución de educación superior. Para este propósito se realizó una investigación de acuerdo con las siguieron etapas: adaptación de la escala de imagen organizacional a población mexicana; integración de escala en formato de diferencial semántico; aplicación de la escala a una muestra de 226 profesores y 541 estudiantes de la Universidad Autónoma del Estado de Hidalgo; determinación de las propiedades psicométricas de la escala (validez de constructo y confiabilidad; estadísticas descriptivas de la imagen organizacional y análisis comparativo de la imagen organizacional por escuela. Los resultados indican que la escala de imagen organizacional adaptada a población mexicana tiene propiedades psicométricas adecuadas para evaluar este constructo. Además, se identificaron diferencias significativas de la imagen de la organización en cada instituto de la IES evaluada.

  20. Análise das propriedades ópticas da água do reservatório Rodolfo Costa e Silva – Itaara, RS, Brasil, usando dados espectrais de campo e imagens orbitais multiespectrais

    Directory of Open Access Journals (Sweden)

    Conrado de Moraes Rudorff

    2007-06-01

    Full Text Available O trabalho avaliou a separabilidade de classes de água, a partir de técnicas de análises da reflectância de superfície, com dados medidos em campo e imagens multiespectrais adquiridas em nível orbital. A área de estudo foi o reservatório Rodolfo Costa e Silva, localizado na região central do Rio Grande do Sul. A metodologia foi baseada na coleta de dados in situ – total de sólidos em suspensão, clorofila (a, b, c, transparência da água e espectros de reflectância bidirecional – em 21 pontos amostrais no dia 16 de maio de 2006. A técnica de remoção do contínuo foi aplicada aos espectros de campo em quatro intervalos de bandas de absorção: 400-550nm, 610-640nm, 650-680nm e 580-700nm. Os parâmetros de remoção do contínuo das bandas de absorção analisados foram: profundidade, área e largura. Verificou-se que os parâmetros de profundidade, área e a largura da banda de absorção não apresentaram potencial de separabilidade em classes espectrais relacionadas à pequena variação na concentração dos componentes opticamente ativos na água. Imagens CBERS-2/CCD e Landsat 5/TM adquiridas em datas próximas à atividade de campo foram corrigidas dos efeitos atmosféricos e classificadas. Os resultados das classificações não apresentaram correlações significativas com os parâmetros de qualidade da água, a fim de proporcionar uma caracterização espectral das classes de água ou compartimentos. A dificuldade no estabelecimento de relações entre os parâmetros de reflectância espectral e qualidade da água foi devida, principalmente, à baixa variabilidade dos componentes opticamente ativos na água do Reservatório Rodolfo Costa e Silva. Neste caso, as análises espectrais testadas neste trabalho não foram sensíveis às pequenas variações observadas por meio dos dados de campo.

  1. "La voz de los espectros" - Imagen y política en la Argentina de fin de siglo

    Directory of Open Access Journals (Sweden)

    Lic. María L. Beatriz Alem

    1998-01-01

    Full Text Available El presente trabajo intenta dar cuenta de ciertas imágenes políticas que aparecen en el escenario público, a partir de la relación de presencia/ausencia; y que marcan en principio una particularidad, la de no ser hechos actuales; sin embargo, siempre vuelven, y se instalan generando diversas y antagónicas reacciones, que van desde la adhesión al rechazo. En este recorrido intentaremos explicar esta modalidad, a partir de ciertas imágenes de la política argentina. Para ello vamos a citar dos ejemplos: la imagen de Eva Perón y la imagen de los desaparecidos en la última dictadura militar de 1976. Comenzaremos por describir el origen de las imagos, ya que las mismas tenían por función inmortalizar el poder. Y esta categoría de inmortal era posible a partir de la consagración de los cuerpos. Las imágenes que aquí proponemos aparecen de modo diferente, podemos inferir que la imagen de Eva Perón se constituye en el modo que tienen las imágenes religiosas que unen a la comunidad de creyentes y mantienen con su imagen una relación que trasciende la devoción para instalarla en el plano milagroso. En tanto que la imagen de los desaparecidos vuelven de un modo fantasmagórico, al modo que vuelven los fantasmas reclamando justicia. Concluiremos que entender el significado de estas imágenes, desde lo espectral y desde lo siniestro que ellas contienen, es sacarlas de la simple idea alucinógena que pueden resultarnos; fundamentalmente porque el escenario de la política argentina sigue recibiendo el mensaje de los fantasmas, que sectores del poder se niegan a escuchar, por se justamente un reclamo que cuestiona el "orden" establecido.

  2. Estimativa de imagens solares soho através de redes neurais artificiais

    Science.gov (United States)

    Andrade, M. C.; Fernandes, F. C. R.; Cecatto, J. R.; Rios Neto, A.; Rosa, R. R.; Sawant, H. S.

    2003-08-01

    A Rede Neural Artificial (RNA), no âmbito da teoria computacional, constitui uma teoria emergente que, por possuir habilidade em aprender a partir de dados de entrada, encontra diferentes aplicações em diferentes áreas. Um exemplo é a utilização de RNA na caracterização de padrões associados à dinâmica de processos espaço-temporais relacionados a fenômenos físicos não-lineares. Para obter informações sobre o comportamento destes fenômenos físicos utiliza-se, em diversos casos, seqüências de imagens digitalizadas, onde a caracterização de alguns fenômenos espaço-temporais é o procedimento mais viável para descrever a dinâmica das regiões ativas do Sol. Com base em imagens observadas por telescópios a bordo de satélites, estudos de previsão de eventos solares podem ser programados, permitindo prever possíveis efeitos posteriores nas regiões mais próximas da Terra (tempestades geomagnéticas e irregularidades ionosféricas). Neste trabalho avaliamos o desempenho da RNA para estimar padrões espaço-temporais, ou seja, imagens solares em ultravioleta, obtidas através do telescópio a bordo do satélite SOHO. Os resultados mostraram que as RNA conseguem generalizar os padrões de maneira satisfatória sem perder de forma significativa os principais aspectos da configuração global da atmosfera solar, comprovando a eficácia da RNA como ferramenta para esse tipo de aplicação. Portanto, este trabalho comprova a viabilidade de uso desta ferramenta em projetos voltados ao estudo do comportamento solar, em trabalhos do grupo de Física do Meio Interplanetário (FMI) na DAS e em programas desenvolvidos pelo Núcleo de Simulação e Análise de Sistemas Complexos (NUSASC) do Laboratório Associado de Computação e Matemática Aplicada (LAC) do INPE.

  3. Avaliação da simetria craniana através de imagens de TC cone beam = Cranial symmetry assessment through cone-beam CT images

    OpenAIRE

    Vilella, Oswaldo de Vasconcellos; Rothier, Eduardo Kant Colunga; Vilella, Beatriz de Souza

    2014-01-01

    Objetivo: O objetivo do presente estudo foi comparar os lados direito e esquerdo de indivíduos que apresentavam simetria craniana através de 2 imagens geradas pela tomografia computadorizada cone beam (TCCB). Métodos: A amostra consistiu de 35 imagens obtidas pelo tomógrafo 3D-i-CAT (Imaging Sciences International Inc. , Hatfield, USA), sendo 13 de indivíduos do gênero masculino e 22 do gênero feminino, com idades variando de 8 a 64 anos, que apresentavam simetria facial aceitável. As imagens...

  4. La imagen violenta como argumento contra la violencia. El papel de las imágenes violentas en la lucha por los derechos civiles de los afroamericanos

    OpenAIRE

    López Serrano, Alfredo

    2008-01-01

    Actas del Primer Congreso Internacional sobre Imagen, Cultura y Tecnología celebrado del 3 al 5 de septiembre de 2008 en la Universidad Carlos III de Madrid Contrariamente a lo que ocurría en otros momentos del pasado, en que la imagen de los vencidos era el principal argumento del poder de los vencedores, la imagen de los efectos de la violencia y de sus víctimas genera animadversión hacia los que ejercen esta violencia y simpatías hacia la causa de los que la sufren. Las razones hay que ...

  5. El rol de la semiótica en la imagen corporativa de las empresas Almacenes Éxito, Davivienda S.A. y Bancolombia

    OpenAIRE

    Vargas Almeida, Gissell Alejandra; Mora Charria, Oscar Leonardo; Ramírez Vasquez, Tatiana Paola

    2012-01-01

    La semiótica hace parte de la construcción de la imagen, desde la concepción primaria de la misma, ya que sin el análisis semiótico no podría concebirse la imagen tal como se entiende hoy en día. Gracias a los mercados cambiantes, la globalización y los impredecibles cambios económicos que encara la sociedad, las empresas deben mantenerse a la vanguardia, no solo en lo concerniente a sus productos y servicios, sino también en la imagen que proyectan a sus clientes. Por lo anterior, esta monog...

  6. Perspective View with Landsat Overlay, Salt Lake City, Utah

    Science.gov (United States)

    2002-01-01

    Most of the population of Utah lives just west of the Wasatch Mountains in the north central part of the state. This broad east-northeastward view shows that region with the cities of Ogden, Salt Lake City, and Provo seen from left to right. The Great Salt Lake (left) and Utah Lake (right) are quite shallow and appear greenish in this enhanced natural color view. Thousands of years ago ancient Lake Bonneville covered all of the lowlands seen here. Its former shoreline is clearly seen as a wave-cut bench and/or light colored 'bathtub ring' at several places along the base of the mountain front - evidence seen from space of our ever-changing planet.This 3-D perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM), a Landsat 5 satellite image mosaic, and a false sky. Topographic expression is exaggerated four times.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot) resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive, managed by the U.S. Geological Survey (USGS).Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif

  7. Effects of Landsat 5 Thematic Mapper and Landsat 7 Enhanced Thematic Mapper plus radiometric and geometric calibrations and corrections on landscape characterization

    Science.gov (United States)

    Vogelmann, James E.; Helder, Dennis; Morfitt, Ron; Choate, Michael J.; Merchant, James W.; Bulley, Henry

    2001-01-01

    The Thematic Mapper (TM) instruments onboard Landsats 4 and 5 provide high-quality imagery appropriate for many different applications, including land cover mapping, landscape ecology, and change detection. Precise calibration was considered to be critical to the success of the Landsat 7 mission and, thus, issues of calibration were given high priority during the development of the Enhanced Thematic Mapper Plus (ETM+). Data sets from the Landsat 5 TM are not routinely corrected for a number of radiometric and geometric artifacts, including memory effect, gain/bias, and interfocal plane misalignment. In the current investigation, the effects of correcting vs. not correcting these factors were investigated for several applications. Gain/bias calibrations were found to have a greater impact on most applications than did memory effect calibrations. Correcting interfocal plane offsets was found to have a moderate effect on applications. On June 2, 1999, Landsats 5 and 7 data were acquired nearly simultaneously over a study site in the Niobrara, NE area. Field radiometer data acquired at that site were used to facilitate crosscalibrations of Landsats 5 and 7 data. Current findings and results from previous investigations indicate that the internal calibrator of Landsat 5 TM tracked instrument gain well until 1988. After this, the internal calibrator diverged from the data derived from vicarious calibrations. Results from this study also indicate very good agreement between prelaunch measurements and vicarious calibration data for all Landsat 7 reflective bands except Band 4. Values are within about 3.5% of each other, except for Band 4, which differs by 10%. Coefficient of variation (CV) values derived from selected targets in the imagery were also analyzed. The Niobrara Landsat 7 imagery was found to have lower CV values than Landsat 5 data, implying that lower levels of noise characterize Landsat 7 data than current Landsat 5 data. It was also found that following

  8. Entre prisões da imagem, imagens da prisão

    Directory of Open Access Journals (Sweden)

    Fernanda Spanier Amador

    2014-04-01

    Full Text Available O artigo discute a temática das prisões, da imagem e da subjetividade. Pensando na direção das análises foucaultianas de que as prisões estão estabelecidas nos mais ínfimos espaços da vida cotidiana pelas práticas disciplinares e por jogos de visibilidade e enunciabilidade, pergunta-se: como a experimentação de produção de imagens digitais a respeito do trabalho na prisão, por parte de trabalhadores penitenciários, pode criar um plano perturbador das tecnologias prisionais já estabelecidas, introduzindo dissonâncias nas enunciabilidades e nas visibilidades que atravessam a prisão?

  9. La imagen del pueblo en el Panegírico de Coripo a Justino II

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    Manuel RODRIGUEZ GERVÁS

    2010-02-01

    Full Text Available RESUMEN: Este artículo pretende analizar la representación ideal que Flavio Cresconio Coripo, un gramático del siglo VI, tiene acerca del elemento popular del mundo bizantino. Partiendo de la enunciación del léxico empleado por el autor y de las diversas actuaciones de la plebe de Constantinopla observamos cómo la imagen transmitida no es más que el reflejo de una dualidad social.ABSTRACT: The aim of this paper is to analyze the social role that Flavius Cresconius Corippus, a sixth-century grammarian, grants to the popular element of the Byzantine world. Based on the enunciation of the lexicon used by the author to designate the people and the various actions of the plebeians of Constantinople, we can observe how the image transmitted, although the representation is deceiving, is only a reflection of a social duality.

  10. ¿Puede ocultarse información en una imagen de computador?

    Directory of Open Access Journals (Sweden)

    Jorge Eduardo Ortiz Triviño

    2001-01-01

    Full Text Available Con la actual tecnología computacional es posible implementar técnicas de procesamiento de señales que permitan ocultar información dentro de archivos existentes. De esta manera es posible, por ejemplo, emplear un archivo gráfico para guardar un texto dentro de él sin que la imagen contenida en éste se dañe o se deteriore y con la ventaja de que el texto oculto puede recuperarse. Este tipo de procedimientos es útil en seguridad de redes y permitirá realizar transacciones seguras en la red Internet, entre otras aplicaciones. En este artículo se propone una técnica y se explica el programa prototipo que logra realizar esta tarea (programa implementado por estudiantes de la carrera de Ingeniería de Sistemas.

  11. LA IMAGEN EN EL TURISMO URBANO: REVISITANDO EL TOLEDO ROMÁNTICO

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    Carmen García Martínez

    2011-01-01

    Full Text Available La imagen de la ciudad es un elemento fundamental para el turismo cultural dirigido a los núcleos urbanos. La literatura ha contribuido en gran medida a crear algunas de estas imágenes y las que ha proporcionado el Romanticismo figuran entre las más valiosas. En este trabajo se repasan las características paisajísticas de la interpretación romántica de Toledo a través de los relatos de viajeros entre 1830 y 1870. La utilización de estas imágenes se inserta en el modelo actual de turismo, y en la falta de autenticidad de algunas de las propuestas de gestión de la actividad turística.

  12. Imagen familiar y concepto de tiempo. Propuesta para tercer grado de educación primaria.

    OpenAIRE

    Carreras-Soler, Anna

    2014-01-01

    El presente Trabajo de Fin de Grado hace una aproximación a la didáctica de la historia y el modo cómo se comprende el concepto del tiempo en la Educación Primaria. Con el principio de la imagen como código de comunicación de nuestro tiempo y sus posibilidades a través de las TIC, analiza el papel que desempeña en este proceso cognitivo, desde el estudio de los parámetros de la percepción visual, las posibilidades emocionales que ofrece y las estrategias para su correcta interpretación. En...

  13. Percepción de la propia imagen corporal en pacientes obesos o con sobrepeso.

    Directory of Open Access Journals (Sweden)

    Faustino Abad Massanet

    2012-08-01

    Full Text Available La obesidad es un importante problema de salud en la comunidad, y su abordaje es complejo. La valoración de la propia imagen corporal podría ser de ayuda, en pacientes obesos o con sobrepeso, para orientar hacia la obtención de un peso más saludable. Con este objetivo se utilizó una escala de figuras (escala de Stunkard en pacientes de estas características, comparando la figura seleccionada por cada participante con la correspondiente a su Índice de Masa Corporal real. La concordancia entre ambas fue escasa, con marcado predominio de sujetos que infravaloran su IMC. El error en la valoración fue significativamente mayor entre las mujeres, en los participantes con menor nivel de estudios, y entre los que presentaban algún componente del síndrome metabólico.

  14. La cultura de la imagen y el declive de la lecto-escritura

    Directory of Open Access Journals (Sweden)

    R. de la Flor, Fernando

    2010-06-01

    Full Text Available This article surveys the so-called visual turn that has currently taken place in cultural studies. It departs from the existing rivalry between writing and image and it advances a genealogy for this confrontation. This study insists on the diverse effects that the so-called visual turn has brought about in the reorganization of various areas of academic studies.

    El artículo aborda en perspectiva el llamado visual turn producido en los estudios culturales: remonta la cuestión de una rivalidad entre la escritura y la imagen, estableciendo una cierta genealogía para este “enfrentamiento”. Para concluir, el trabajo finalmente recala en ciertos efectos que dicho giro visual tendrá sin duda en la reorganización de los campos de saber académicos.

  15. La imagen de las mujeres en la era de la comunicación

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    Felicidad Loscertales

    2008-01-01

    Full Text Available Los medios de comunicación producen desigualdad de género mediante la construcción de un entorno simbólico dañino. A través del discurso mediático, compuesto de roles y estereotipos, la imagen de la mujer es gestionada, transmitiendo inferioridad respecto al hombre. El artículo resalta la influencia de estos discursos mediáticos sobre las relaciones sociales y humanas, la discriminación y la marginación de la mujer. Media produce gender inequality by means of the construction of a harmful symbolic environment. Through media discourse, made up with stereotypes, woman image is negotiated, transmitting inferiority regarding man. The paper highlights the influence of these media discourses on social relationships and woman's discrimination.

  16. Úbeda : la consolidación de la imagen renacentista

    Directory of Open Access Journals (Sweden)

    María Dolores Antigüedad del Castillo Olivares

    2004-01-01

    Full Text Available La ciudad de Úbeda ha sido calificada por la UNESCO Ciudad Patrimonio de la Humanidad por su singularidad como ciudad renacentista. Esta imagen renacentista se ha ido consolidando desde los inicios del siglo XX y está en buena medida asociada a la valorización de la arquitectura del Renacimiento. Las restauraciones modernas han insistido en la importancia de los restos arquitectónicos renacentistas que adquieren así relevancia en detrimento de la estructura urbana de origen medieval.Úbeda was included in the UNESCO’s World Heritage List due to its singularity as Renaissance town. This Renaissance image has been consolidated since the begining of the 20th century and it is also closely related to a higher consideration of the Renaissance architecture. Modern restorations gave Renaissance architectural remains some importance over the medieval urban structure.

  17. El video(arte o el grado Lego de la imagen

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    Sergio Roncallo

    2005-01-01

    Full Text Available Este artículo pretende acercarse al videoarte y repensarlo como una forma expresiva en la que la imagen recupera un estatus ontológico que permanecía eclipsado por la sombra del platonismo. Se intenta, además, buscar algunas raíces del videoarte, explicitar sus relaciones con las vanguardias, la fotografía, el cine y la televisión. Asimismo, el texto intenta poner sobre la mesa algunas reflexiones tradicionales sobre el videoarte y cuestionarlas desde una óptica menos convencional, más orientada hacia la reflexión que, a partir de éste, puede hacerse a propósito de la mímesis y la representación del mundo.

  18. Uso de SSIM como índice de calidad de imagen médica

    OpenAIRE

    Prieto Renieblas, Gabriel

    2009-01-01

    El objetivo de este trabajo ha sido estudiar el comportamiento del Índice de Similitud Estructural (SSIM) , en su versión Índice de Correlación Cruzada de Similitud Estructural Multiescala (R*) en la evaluación de imágenes médicas. Este modelo se basa en la hipótesis de que el sistema visual humano está muy adaptado para extraer información estructural de las imágenes, de tal forma que una medida de la información estructural puede dar una buena aproximación de la calidad de imagen percibida....

  19. Tratamiento curricular de la imagen corporal, autoestima y autoconcepto en España

    Directory of Open Access Journals (Sweden)

    Antonio V. Rodríguez

    2015-03-01

    Full Text Available La adolescencia es un periodo del desarrollo del ser humano en el que proliferan problemas con la percepción de la imagen corporal, la autoestima y el autoconcepto, mientras el niño se encuentra cursando estudios de Educación Secundaria Obligatoria. Este estudio analiza el tratamiento curricular que se dedica a la imagen corporal, la autoestima y el autoconcepto en los diferentes elementos legislativos en el ámbito educativo de la Comunidad Valenciana (España, mediante una metodología cualitativa, a través de la técnica del análisis documental no interactiva. Los resultados del análisis de los documentos, correspondientes a la ordenación académica de la etapa en esta comunidad autónoma, mostraron una presencia de estos contenidos tanto en los planteamientos del ámbito nacional concerniente a la LOE (2006 y el Real Decreto 1631/2006, como en los regionales materializados en el Decreto 112/2007. Aparecen específicamente en algunos elementos del currículo de materias como Educación Física, Educación para la Ciudadanía, Matemáticas, Biología y Geología, Ciencias de la Naturaleza y Música, a pesar de que no en todas ellas adquieren el mismo protagonismo, destacando en este sentido la Educación Física como materia que más se centra tanto en el trabajo como en el desarrollo de estos aspectos. Dentro de ella se muestra un desequilibrio en cuanto al protagonismo alcanzado en lo que se pretende que aprendan (objetivos y en su ínfima plasmación en las herramientas para alcanzarlo (contenidos, así como en el cómo evaluarlo (criterios de evaluación.

  20. Influencia del microsite en la imagen de marca a través de experiencias significativas

    Directory of Open Access Journals (Sweden)

    Belinda de Frutos Torres

    2012-04-01

    Full Text Available Las empresas e instituciones, actualmente, son conscientes del potencial que ofrece internet como instrumento para mantener una relación activa con sus públicos de interés. Con este propósito diseñan estrategias de comunicación específicamente destinadas a que el usuario pueda establecer una relación interactiva con la marca. Una de las formas de estar presente en la red es a través del microsite que se perfilan como una solución para estrechar los lazos entre el usuario y la marca.El objetivo del estudio es valorar la influencia del microsite como herramienta de comunicación corporativa y su importancia en la construcción de la imagen de marca. Para ello se ha llevado a cabo un estudio empírico a partir de tres acciones de comunicación reales de tres marcas conocidas representativas de tres estrategias de comunicación. Las tres acciones se llevaron a cabo con microsites y fueron visitados y evaluados por una muestra de 41 personas. Los resultados muestran que la valoración global hacia el microsite puede explicarse en torno a tres dimensiones su grado de entretenimiento, su valor informativo y el agrado asociado. Se comprueba que la experiencia generada por el microsite es diferente dependiendo de la estrategia de comunicación utilizada y contribuye de forma distinta a explicar la actitud hacia la marca. Cada estrategia constituye una experiencia diferenciada para el usuario sin embargo la implicación del usuario con la categoría del producto obtiene un papel determinante en  la relación con la imagen de marca.

  1. Control monocular 3D dinámico basado en imagen

    Directory of Open Access Journals (Sweden)

    Luis Hernández Santana

    2011-09-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} En este trabajo se presenta un sistema de control servovisual para regulación de posición de un robot manipulador con cámara en mano que se mueve en el espacio cartesiano 3D. El objetivo es control el robot de tal forma que la imagen de una esfera en movimiento se mantenga en el centro del plano imagen con radio constante. Se propone una estrategia de control con dos lazos en cascada, el lazo interno resuelve el control articular y el lazo externo implementa el control con realimentación visual. El robot y el sistema de visión son modelados para pequeñas variaciones alrededor del punto de operación para control de posición. Para estas condiciones se muestran la estabilidad del sistema y la respuesta en estado estable para trayectorias del objeto. Para ilustrar las prestaciones del sistema, se presentan los resultados experimentales para un manipulador ASEAIRB6.

  2. Imagen y Arte: La Necesidad de la Experiencia por la Sensación

    Directory of Open Access Journals (Sweden)

    Donald Hugh de Barros Kerr Junior (Goy

    2016-02-01

    Full Text Available Muchos procedimientos utilizados en propuestas pedagógicas definen las artes visuales en el cotidiano de escuelas brasileras. Cuestionamos aquellos que, despotencializados, continúan afirmando un carácter meramente instrumental y utilitario del quehacer artístico. Comenzamos la discusión tomando procedimientos que acaban confirmando que la imagen en la escuela, en gran parte, es tratada como ilustración y no como productora de pensamiento. Preguntamos: ¿qué alternativas pueden ser erguidas en el sentido de actualizar el uso de la imagen artística en el salón de clase? ¿Cómo huir de los estereotipos y modelos? Nos fundamentamos en los conceptos de experiencia y de arte como sensación. Con el concepto e heterotopía provocamos la percepción de algo que puede romper la sintaxis y presentarse por la sensación. Defendemos prácticas que hagan funcionar el arte como sensación y no a través de un lenguaje que fija y codifica lo no codificable de la experiencia artística. La sensación puede romper también con una formación docente apegada a rótulos, modelos y modismos. Abriéndonos al no cliché, nuevas formas de pensar y sentir, nos aproximan de los modos de crear propios del arte. Al dar continuidad a estos modos en nuestras vidas, repetimos en la diferencia rompiendo con aquellos procesos tan gobernados y lineales que se empeñan obstinadamente en permanecer en nuestra cotidianidad.

  3. Percepción de la imagen corporal en adolescentes españoles

    Directory of Open Access Journals (Sweden)

    Marrodán, María D.

    2005-01-01

    Full Text Available A finales del 2003 un trabajo realizado por nuestro equipo sobre un efectivo muestral de 5921 jóvenes madrileños, puso de manifiesto que comenzaba a ser preocupante en nuestro medio, tanto la proporción de adolescentes con sobrepeso, como los que manifestaban cierto grado de malnutrición proteico-calórica (González-Montero y Marrodán 2003; Marrodán et al. 2004. Convencidos de que es fundamental identificar los factores de riesgo que conducen a tales situaciones iniciamos nuevas vías de investigación con tal propósito. En este sentido, la autopercepción de la propia imagen, así como el grado de satisfacción que el adolescente manifiesta en relación a su aspecto y morfofisiología pueden ser un determinante del riesgo a desarrollar comportamientos alimentarios inadecuados que, finalmente, desemboquen en trastornos como la anorexia o la bulimia. Con este fin, se recogió, en Institutos de Enseñanza Secundaria de Madrid, una muestra de jóvenes entre 12-16 años, período de especial sensibilidad ante la influencia de patrones comportamentales trasmitidos por los medios de comunicación. Se tomaron medidas antropométricas indicadoras de tamaño, forma y composición corporal y se valoró la percepción de la imagen mediante una adaptación de los modelos propuesto por Stuntkard y Setellard (1990 y Collins (1991. Se analizó el grado de concordancia entre los índices antropométricos y la percepción individual de la figura corporal.

  4. LANDSAT menhaden and thread herring resources investigation. [Gulf of Mexico

    Science.gov (United States)

    Kemmerer, A. J. (Principal Investigator); Brucks, J. T.; Butler, J. A.; Faller, K. H.; Holley, H. J.; Leming, T. D.; Savastano, K. J.; Vanselous, T. M.

    1977-01-01

    The author has identified the following significant results. The relationship between the distribution of menhaden and selected oceanographic parameters (water color, turbidity, and possibly chlorophyll concentrations) was established. Similar relationships for thread herring were not established nor were relationships relating to the abundance of either species. Use of aircraft and LANDSAT remote sensing instruments to measure or infer a set of basic oceanographic parameters was evaluated. Parameters which could be accurately inferred included surface water temperature, salinity, and color. Water turbidity (Secchi disk) was evaluated as marginally inferrable from the LANDSAT MSS data and chlorophyll-a concentrations as less than marginal. These evaluations considered the parameters only as experienced in the two test areas using available sensors and statistical techniques.

  5. Landsat Data Continuity Mission (LDCM) Standard Product Generation and Characteristics

    Science.gov (United States)

    Micijevic, E.; Hayes, R.

    2012-12-01

    The LDCM's Landsat 8 (L8), planned for launch in February 2013, is the latest satellite in the 40 year history of the Landsat program. The satellite will have two imagers: the Operational Land Imager (OLI) and the Thermal Infrared Sensor (TIRS). The data from both sensors will be processed and combined into the final Level 1 Terrain (L1T) standard product by the Landsat Product Generation System (LPGS) at the USGS Earth Resources Observation and Science (EROS). Landsat 8 products will nominally have 11 image bands; however, products will still be created if OLI only, or TIRS only collections are acquired. The LPGS is designed to create L1T products from Level 0 data by merging OLI and TIRS outputs and performing systematic radiometric and geometric corrections, followed by precision and terrain corrections that include Ground Control Points (GCP), and a Digital Elevation Model (DEM) for topographic accuracy. Scenes that have a quality score of 9 or greater and a percent cloud cover less than 40 will be automatically processed. In addition, any archived scene, regardless of cloud cover, can be requested for processing through USGS EROS clients, GloVis or Earth Explorer. While most data will be processed as Level L1T, some scenes will not have ground control or elevation data necessary for precision or terrain correction, respectively. In these cases, the best level of correction will be applied (Level 1G-systematic or Level 1Gt-systematic terrain). The standard Level 1T products will contain scaled Top of Atmosphere (TOA) reflectance data, only for OLI. The conversion between radiance and reflectance within radiometric processing (L1R) will be performed using the band specific coefficients that are proportional to the respective exoatmospheric solar irradiances and the Earth-Sun distance for the scene's acquisition day. The TIRS data will contain scaled at-sensor radiances and no at-sensor brightness temperature or emissivity conversions are planned. For users that

  6. Techniques for land use change detection using Landsat imagery

    Science.gov (United States)

    Angelici, G. L.; Bryant, N. A.; Friedman, S. Z.

    1977-01-01

    A variety of procedures were developed for the delineation of areas of land use change using Landsat Multispectral Scanner data and the generation of statistics revealing the nature of the changes involved (i.e., number of acres changed from rural to urban). Techniques of the Image Based Information System were utilized in all stages of the procedure, from logging the Landsat data and registering two frames of imagery, to extracting the changed areas and printing tabulations of land use change in acres. Two alternative methods of delineating land use change are presented while enumerating the steps of the entire process. The Houston, Texas urban area, and the Orlando, Florida urban area, are used as illustrative examples of various procedures.

  7. Space science for applications - The history of Landsat

    Science.gov (United States)

    Mach, P. E.

    1981-01-01

    The history of the Landsat project is discussed in terms of three historical phases, each characterized by a dominant problem. From 1964 to 1967, the challenge was to develop interagency cooperation and to achieve consensus on basic plans for the satellite. Between 1968 and 1971, the cooperating agencies had to persuade the Bureau of the Budget to provide funding for the project. Since 1972, the challenge to NASA has been to encourage applications of the Landsat data and plan the shift from an experimental program to an operational one. The tension between experimental and operational goals has run through all these phases, and the conflicts between agencies is detailed, as well as the interaction between technological and political systems.

  8. Monitoring water quality from LANDSAT. [satellite observation of Virginia

    Science.gov (United States)

    Barker, J. L.

    1975-01-01

    Water quality monitoring possibilities from LANDSAT were demonstrated both for direct readings of reflectances from the water and indirect monitoring of changes in use of land surrounding Swift Creek Reservoir in a joint project with the Virginia State Water Control Board and NASA. Film products were shown to have insufficient resolution and all work was done by digitally processing computer compatible tapes. Land cover maps of the 18,000 hectare Swift Creek Reservoir watershed, prepared for two dates in 1974, are shown. A significant decrease in the pine cover was observed in a 740 hectare construction site within the watershed. A measure of the accuracy of classification was obtained by comparing the LANDSAT results with visual classification at five sites on a U-2 photograph. Such changes in land cover can alert personnel to watch for potential changes in water quality.

  9. La imagen radiográfica, una herramienta compleja de interpretar

    Directory of Open Access Journals (Sweden)

    Patricia Alejandra Bertone

    2015-06-01

    Full Text Available ‘Aprender a aprender’ es una propuesta educativa asumida en la Universidad Nacional de Río Cuarto (UNRC-Argentina, que objetiva ayudar a los alumnos a adquirir estrategias y capacidades socio-cognitivas que les permitan construir conocimientos, reconocer motivos y deseos que impulsan sus proyectos de formación personal y profesional. En lo que atañe específicamente a la formación del Médico Veterinario, la información gráfica es cada vez más importante en la práctica veterinaria, situación que debe ser atendida durante el proceso de formación universitaria de los estudiantes. La información gráfica está presente desde el primer año de la carrera, en distintas disciplinas: en Anatomía, Histología, Embriología, Física Biológica, Química Biológica y Fisiología Animal. Situación que permitiría pensar que  durante los primeros tres años de la carrera, los alumnos han desarrollado estrategias de interpretación gráfica; sin embargo, al ingresar al 4to año y se deparan con la lectura de las placas radiográficas en la búsqueda de significados clínicos, se plantean dificultades importantes para los alumnos. Las preguntas que nortean el estudio son: ¿Qué procedimientos cognitivos y metacognitivos los alumnos desarrollan cuando leen una imagen radiográfica?, ¿Cómo está organizada la sección Radiología desde el currículo? Los objetivos generales planteados proponen: a Señalar la creciente importancia de la Radiología en la formación en Medicina Veterinaria en la UNRC; b Conocer los procedimientos intelectuales, cognitivos y metacognitivos, y los aspectos motivacionales involucrados en los alumnos de Medicina Veterinaria cuando ‘leen’ imágenes radiográficas, durante el cursado de la asignatura Semiología. En cuanto a la organización textual del estudio, la primera parte refiere a la dimensión curricular, de corte histórico-narrativo, situando la presencia de la Radiología en la historia de la

  10. Research and development of LANDSAT-based crop inventory techniques

    Science.gov (United States)

    Horvath, R.; Cicone, R. C.; Malila, W. A. (Principal Investigator)

    1982-01-01

    A wide spectrum of technology pertaining to the inventory of crops using LANDSAT without in situ training data is addressed. Methods considered include Bayesian based through-the-season methods, estimation technology based on analytical profile fitting methods, and expert-based computer aided methods. Although the research was conducted using U.S. data, the adaptation of the technology to the Southern Hemisphere, especially Argentina was considered.

  11. Near Real-Time Browsable Landsat-8 Imagery

    Directory of Open Access Journals (Sweden)

    Cheng-Chien Liu

    2017-01-01

    Full Text Available The successful launch and operation of Landsat-8 extends the remarkable 40-year acquisition of space-based land remote-sensing data. To respond quickly to emergency needs, real-time data are directly downlinked to 17 ground stations across the world on a routine basis. With a size of approximately 1 Gb per scene, however, the standard level-1 product provided by these stations is not able to serve the general public. Users would like to browse the most up-to-date and historical images of their regions of interest (ROI at full-resolution from all kinds of devices without the need for tedious data downloading, decompressing, and processing. This paper reports on the Landsat-8 automatic image processing system (L-8 AIPS that incorporates the function of mask developed by United States Geological Survey (USGS, the pan-sharpening technique of spectral summation intensity modulation, the adaptive contrast enhancement technique, as well as the Openlayers and Google Maps/Earth compatible superoverlay technique. Operation of L-8 AIPS enables the most up-to-date Landsat-8 images of Taiwan to be browsed with a clear contrast enhancement regardless of the cloud condition, and in only one hour’s time after receiving the raw data from the USGS Level 1 Product Generation System (LPGS. For any ROI in Taiwan, all historical Landsat-8 images can also be quickly viewed in time series at full resolution (15 m. The debris flow triggered by Typhoon Soudelor (8 August 2015, as well as the barrier lake formed and the large-scale destruction of vegetation after Typhoon Nepartak (7 July 2016, are given as three examples of successful applications to demonstrate that the gap between the user’s needs and the existing Level-1 product from LPGS can be bridged by providing browsable images in near real-time.

  12. An automated approach to mapping corn from Landsat imagery

    Science.gov (United States)

    Maxwell, S.K.; Nuckols, J.R.; Ward, M.H.; Hoffer, R.M.

    2004-01-01

    Most land cover maps generated from Landsat imagery involve classification of a wide variety of land cover types, whereas some studies may only need spatial information on a single cover type. For example, we required a map of corn in order to estimate exposure to agricultural chemicals for an environmental epidemiology study. Traditional classification techniques, which require the collection and processing of costly ground reference data, were not feasible for our application because of the large number of images to be analyzed. We present a new method that has the potential to automate the classification of corn from Landsat satellite imagery, resulting in a more timely product for applications covering large geographical regions. Our approach uses readily available agricultural areal estimates to enable automation of the classification process resulting in a map identifying land cover as ‘highly likely corn,’ ‘likely corn’ or ‘unlikely corn.’ To demonstrate the feasibility of this approach, we produced a map consisting of the three corn likelihood classes using a Landsat image in south central Nebraska. Overall classification accuracy of the map was 92.2% when compared to ground reference data.

  13. Online Global Land Surface Temperature Estimation from Landsat

    Directory of Open Access Journals (Sweden)

    David Parastatidis

    2017-11-01

    Full Text Available This study explores the estimation of land surface temperature (LST for the globe from Landsat 5, 7 and 8 thermal infrared sensors, using different surface emissivity sources. A single channel algorithm is used for consistency among the estimated LST products, whereas the option of using emissivity from different sources provides flexibility for the algorithm’s implementation to any area of interest. The Google Earth Engine (GEE, an advanced earth science data and analysis platform, allows the estimation of LST products for the globe, covering the time period from 1984 to present. To evaluate the method, the estimated LST products were compared against two reference datasets: (a LST products derived from ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer, as higher-level products based on the temperature-emissivity separation approach; (b Landsat LST data that have been independently produced, using different approaches. An overall RMSE (root mean square error of 1.52 °C was observed and it was confirmed that the accuracy of the LST product is dependent on the emissivity; different emissivity sources provided different LST accuracies, depending on the surface cover. The LST products, for the full Landsat 5, 7 and 8 archives, are estimated “on-the-fly” and are available on-line via a web application.

  14. Qualidade das Imagens de Alta Resolução Geradas por Sensores Aéreos Digitais / Image Quality from High Resolution Airbone Sensors

    Directory of Open Access Journals (Sweden)

    Irineu da Silva

    2006-10-01

    Full Text Available Os sensores digitais aerotransportados atualmente disponíveis no mercado possuem dois tipos de soluções: a solução de imagens por quadros, que emula a fotografia clássica, e a solução de imagem tipo “pushbroom”, que se caracteriza por uma imagem contínua, gerada a partir de um arranjo linear de sensores, que varrem a cena e possuem capacidade para gerar faixas de imagens pancromáticas, coloridas e de falsa cor com um nível de resolução elevado, compatível com as imagens pancromáticas geradas pelas câmaras convencionais. Neste artigo serão analisadas e discutidas as principais características das imagens geradas por esse tipo de sensor.

  15. Tabular data base construction and analysis from thematic classified Landsat imagery of Portland, Oregon

    Science.gov (United States)

    Bryant, N. A.; George, A. J., Jr.; Hegdahl, R.

    1977-01-01

    A systematic verification of Landsat data classifications of the Portland, Oregon metropolitan area has been undertaken on the basis of census tract data. The degree of systematic misclassification due to the Bayesian classifier used to process the Landsat data was noted for the various suburban, industrialized and central business districts of the metropolitan area. The Landsat determinations of residential land use were employed to estimate the number of automobile trips generated in the region and to model air pollution hazards.

  16. Reposicionamiento de la imagen corporativa de la Universidad Politécnica Salesiana-UPSQ, en la carrera de Ingeniería Comercial

    OpenAIRE

    Izquierdo, Carlos

    2007-01-01

    Conseguir la sostenibilidad de las instituciones es un imperativo en un mundo globalizado y altamente competitivo; lo cual, implica un posicionamiento de liderazgo en el mercado. Este posicionamiento se logra si el público objetivo tiene una imagen positiva de la institución. La imagen corporativa entendida como el concepto favorable, desfavorable o indiferente que tiene el público sobre una organización, de sus productos y servicios que presta, representa un patrimonio de la institu...

  17. Users, uses, and value of Landsat satellite imagery: results from the 2012 survey of users

    Science.gov (United States)

    Miller, Holly M.; Richardson, Leslie A.; Koontz, Stephen R.; Loomis, John; Koontz, Lynne

    2013-01-01

    Landsat satellites have been operating since 1972, providing a continuous global record of the Earth’s land surface. The imagery is currently available at no cost through the U.S. Geological Survey (USGS). Social scientists at the USGS Fort Collins Science Center conducted an extensive survey in early 2012 to explore who uses Landsat imagery, how they use the imagery, and what the value of the imagery is to them. The survey was sent to all users registered with USGS who had accessed Landsat imagery in the year prior to the survey and over 11,000 current Landsat imagery users responded. The results of the survey revealed that respondents from many sectors use Landsat imagery in myriad project locations and scales, as well as application areas. The value of Landsat imagery to these users was demonstrated by the high importance of and dependence on the imagery, the numerous environmental and societal benefits observed from projects using Landsat imagery, the potential negative impacts on users’ work if Landsat imagery was no longer available, and the substantial aggregated annual economic benefit from the imagery. These results represent only the value of Landsat to users registered with USGS; further research would help to determine what the value of the imagery is to a greater segment of the population, such as downstream users of the imagery and imagery-derived products.

  18. Digital color analysis of color-ratio composite LANDSAT scenes. [Nevada

    Science.gov (United States)

    Raines, G. L.

    1977-01-01

    A method is presented that can be used to calculate approximate Munsell coordinates of the colors produced by making a color composite from three registered images. Applied to the LANDSAT MSS data of the Goldfield, Nevada, area, this method permits precise and quantitative definition of the limonitic areas originally observed in a LANDSAT color ratio composite. In addition, areas of transported limonite can be discriminated from the limonite in the hydrothermally altered areas of the Goldfield mining district. From the analysis, the numerical distinction between limonitic and nonlimonitic ground is generally less than 3% using the LANDSAT bands and as much as 8% in ratios of LANDSAT MSS bands.

  19. Landsat-8: Science and product vision for terrestrial global change research

    Science.gov (United States)

    Roy, David P.; Wulder, M.A.; Loveland, Thomas R.; Woodcock, C.E.; Allen, R. G.; Anderson, M. C.; Helder, D.; Irons, J.R.; Johnson, D.M.; Kennedy, R.; Scambos, T.A.; Schaaf, Crystal B.; Schott, J.R.; Sheng, Y.; Vermote, E. F.; Belward, A.S.; Bindschadler, R.; Cohen, W.B.; Gao, F.; Hipple, J. D.; Hostert, Patrick; Huntington, J.; Justice, C.O.; Kilic, A.; Kovalskyy, Valeriy; Lee, Z. P.; Lymburner, Leo; Masek, J.G.; McCorkel, J.; Shuai, Y.; Trezza, R.; Vogelmann, James; Wynne, R.H.; Zhu, Z.

    2014-01-01

    Landsat 8, a NASA and USGS collaboration, acquires global moderate-resolution measurements of the Earth's terrestrial and polar regions in the visible, near-infrared, short wave, and thermal infrared. Landsat 8 extends the remarkable 40 year Landsat record and has enhanced capabilities including new spectral bands in the blue and cirrus cloud-detection portion of the spectrum, two thermal bands, improved sensor signal-to-noise performance and associated improvements in radiometric resolution, and an improved duty cycle that allows collection of a significantly greater number of images per day. This paper introduces the current (2012–2017) Landsat Science Team's efforts to establish an initial understanding of Landsat 8 capabilities and the steps ahead in support of priorities identified by the team. Preliminary evaluation of Landsat 8 capabilities and identification of new science and applications opportunities are described with respect to calibration and radiometric characterization; surface reflectance; surface albedo; surface temperature, evapotranspiration and drought; agriculture; land cover, condition, disturbance and change; fresh and coastal water; and snow and ice. Insights into the development of derived ‘higher-level’ Landsat products are provided in recognition of the growing need for consistently processed, moderate spatial resolution, large area, long-term terrestrial data records for resource management and for climate and global change studies. The paper concludes with future prospects, emphasizing the opportunities for land imaging constellations by combining Landsat data with data collected from other international sensing systems, and consideration of successor Landsat mission requirements.

  20. SRTM Perspective View with Landsat Overlay: San Jose, Costa Rica

    Science.gov (United States)

    2001-01-01

    This perspective view shows the capital city of San Jose, Costa Rica, in the right center of the image (gray area). Rising behind it are the volcanoes Irazu, 3402 meters high (11,161 feet) and Turrialba, 3330 meters high (10,925 feet.)Irazu is the highest volcano in Costa Rica and is located in the Irazu Volcano National Park, established in 1955. There have been at least 23 eruptions of Irazu since 1723, the most recent during 1963 to 1965. This activity sent tephra and secondary mudflows into cultivated areas, caused at least 40 deaths, and destroyed 400 houses and some factories.This image was generated in support of the Central American Commission for Environment and Development through an agreement with NASA. The Commission involves eight nations working to develop the Mesoamerican Biological Corridor, an effort to study and preserve some of the most biologically diverse regions of the planet.This three-dimensional perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM) and an enhanced false-color Landsat 7 satellite image. Colors are from Landsat bands 5, 4, and 2 as red, green and blue, respectively. Topographic expression is exaggerated 2X.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter resolution of most Landsat images and will substantially help in analyses of the large and growing Landsat image archive. The Landsat 7 Thematic Mapper image used here was provided to the SRTM by the United States Geological Survey, Earth Resources Observation Systems (EROS) Data Center, Sioux Falls, South Dakota.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11,2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM

  1. Analysis of Coastline Extraction from Landsat-8 OLI Imagery

    Directory of Open Access Journals (Sweden)

    Yaolin Liu

    2017-10-01

    Full Text Available Coastline extraction is a fundamental work for coastal resource management, coastal environmental protection and coastal sustainable development. Due to the free access and long-term record, Landsat series images have the potential to be used for coastline extraction. However, dynamic features of different types of coastlines (e.g., rocky, sandy, artificial, caused by sea level fluctuation from tidal, storm and reclamation, make it difficult to be accurately extracted with coarse spatial resolution, e.g., 30 m, of Landsat images. To access this problem, we analyze the performance of coastline extraction by integrating downscaling, pansharpening and water index approaches in increasing the accuracy of coastline extraction from the latest Landsat-8 Operational Land Imager (OLI imagery. In order to prove the availability of the proposed method, we designed three strategies: (1 Strategy 1 uses the traditional water index method to extract coastline directly from original 30 m Landsat-8 OLI multispectral (MS image; (2 Strategy 2 extracts coastlines from 15 m fused MS images generated by integrating 15 m panchromatic (PAN band and 30 m MS image with ten pansharpening algorithms; (3 Strategy 3 first downscales the PAN band to a finer spatial resolution (e.g., 7.5 m band, and then extracts coastlines from pansharpened MS images generated by integrating downscaled spatial resolution PAN band and 30 m MS image with ten pansharpening algorithms. Using the coastline extracted from ZiYuan-3 (ZY-3 5.8 m MS image as reference, accuracies of coastlines extracted from MS images in three strategies were validated visually and quantitatively. The results show that, compared with coastline extracted directly from 30 m Landsat-8 MS image (strategy 1, strategy 3 achieves the best accuracies with optimal mean net shoreline movement (MNSM of −2.54 m and optimal mean absolute difference (MAD of 11.26 m, followed by coastlines extracted in strategy 2 with optimal MNSM

  2. SRTM Perspective View with Landsat Overlay: Costa Rica Coastal Plain

    Science.gov (United States)

    2001-01-01

    This perspective view shows the northern coastal plain of Costa Rica with the Cordillera Central, composed of a number of active and dormant volcanoes, rising in the background. This view looks toward the south over the Rio San Juan, which marks the boundary between Costa Rica and Nicaragua. The smaller river joining Rio San Juan in the center of the image is Rio Sarapiqui, which is navigable upstream as far inland as Puerto Viejo (Old Port) de Sarapiqui at the mountain's base. This river was an important transportation route for those few hardy settlers who first moved into this region, although as recently as 1953 a mere three thatched-roof houses were all that comprised the village of Puerto Viejo.This coastal plain is a sedimentary basin formed about 50 million years ago composed of river alluvium and lahar (mud and ash flow) deposits from the volcanoes of the Cordillera Central. It comprises the province of Heredia (the smallest of Costa Rica's seven) and demonstrates a wide range of climatic conditions, from warm and humid lowlands to cool and damp highlands, and including the mild but seasonally wet and dry Central Valley.This image was generated in support of the Central American Commission for Environment and Development through an agreement with NASA. The Commission involves eight nations working to develop the Mesoamerican Biological Corridor, an effort to study and preserve some of the most biologically diverse regions of the planet.This three-dimensional perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM) and an enhanced false-color Landsat 7 satellite image. Colors are from Landsat bands 5, 4, and 2 as red, green and blue, respectively. Topographic expression is exaggerated 2X.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter resolution of most Landsat images and will substantially help in analyses of the large and growing Landsat

  3. Perspective View with Landsat Overlay, Lakes Managua and Nicaragua

    Science.gov (United States)

    2002-01-01

    This perspective view shows Lakes Managua and Nicaragua near the Pacific coast of Nicaragua. Lake Managua is the 65-kilometer (40-mile)-long fresh water lake in the foreground of this south-looking view, emptying via the Tipitapa River into the much larger Lake Nicaragua in the distance. The capital city of Managua, with a population of more than 500,000, is located along the southern shore of Lake Managua, the area with the highest population density in Nicaragua.The physical setting of Lake Managua is dominated by the numerous volcanic features aligned in a northwest-southeast axis. The cone-like feature in the foreground is Momotombo, a 1,280-meter (4,199-foot)-high stratovolcano located on the northwest end of the lake. Two water-filled volcanic craters (Apoyegue and Jiloa volcanoes) reside on the Chiltepe Peninsula protruding into the lake from the west. Two volcanoes can also be seen on the island of Ometepe in Lake Nicaragua: El Maderas rising to 1,394 meters (4,573 feet) and the active El Conception at 1,610 meters (5,282 feet).This three-dimensional perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM) and an enhanced false-color Landsat 7 satellite image. Colors are from Landsat bands 5, 4, and 2 as red, green and blue, respectively. Topographic expression is exaggerated two times.Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter resolution of most Landsat images and will substantially help in analyses of the large and growing Landsat image archive. The Landsat 7 Thematic Mapper image used here was provided to the SRTM by the United States Geological Survey, Earth Resources Observation Systems (EROS) Data Center, Sioux Falls, S.D.Elevation data used in this image was acquired by the SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar

  4. Coleta de dados a partir de imagens: considerações sobre a privacidade dos usuários em redes sociais

    Directory of Open Access Journals (Sweden)

    Fabrício Silva Assumpção

    2015-08-01

    Full Text Available Considerando a privacidade dos dados dos usuários nas redes sociais, o papel das imagens nas redes sociais e as imagens como fontes de dados, objetiva-se identificar como a coleta de dados a partir de imagens é tratada no Facebook e no Instagram. Para isso, são identificados os principais métodos utilizados para a coleta de dados a partir de imagens no Facebook e no Instagram, as menções à coleta de dados a partir das imagens nas políticas dessas redes sociais, e as opções dos usuários para a configuração desta coleta. Conclui-se que as políticas dessas redes sociais se mostram vagas em diversos momentos no que diz respeito à coleta de dados a partir de imagens, sem especificar quais dados são coletados e listando itens apenas com caráter exemplificativo. Essas conclusões ressaltam a necessidade de conscientização dos usuários de redes sociais acerca de sua privacidade durante a coleta de dados.

  5. Factores determinantes del éxito para entender la imagen de un alojamiento turístico. Un estudio empírico en Islas Canarias

    Directory of Open Access Journals (Sweden)

    Sergio Moreno-Gil

    2012-06-01

    Full Text Available La imagen de un alojamiento turístico es vital para garantizar su éxito y reputación en el mercado. Sin embargo, hasta el momento, se ha ignorado por completo el análisis sobre la imagen de cierta tipología de alojamientos turísticos, como es la oferta extra-hotelera (apartamentos, condominios, villas, bungalows, etc., pese a su importancia en muchos países de Latinoamérica o en España. El objetivo de este trabajo es contribuir a entender mejor la imagen de los establecimientos extra-hoteleros, identificando sus dimensiones, y analizar la importancia de las mismas para explicar la imagen global de dichos establecimientos turísticos. Al mismo tiempo, también se pretende comprender mejor el proceso de formación de la imagen del cliente, estudiando para ello cómo influyen los factores personales del turista y los relativos al propio establecimiento en la formación de su imagen del alojamiento. El estudio concluye con las implicaciones prácticas y académicas al respecto.

  6. Imagen corporal y autoestima en mujeres con cáncer de mama participantes en un programa de intervención psicosocial

    Directory of Open Access Journals (Sweden)

    Julia Sebastián

    2007-01-01

    Full Text Available En el tema del cáncer de mama, uno de los aspectos que ha suscitado mayor interés se refiere a la adaptación a los cambios en la imagen corporal que su tratamiento conlleva. Los objetivos que persigue nuestro trabajo se refieren a varios aspectos relacionados con la imagen corporal y la autoestima, como son: a comprobar la eficacia de un programa de intervención psicosocial que incide sobre la mejora de la imagen corporal y la autoestima, comparando dos grupos de intervención y control en cada uno de los momentos pretratamiento, post-tratamiento y seguimiento y b analizar la influencia de las variables socioeconómicas y médicas (tipo de cirugía y tipo de tratamiento en la imagen corporal y la autoestima. Los resultados muestran que para la imagen corporal, el grupo de intervención obtiene puntuaciones más elevadas que el grupo control en el postratamiento y seguimiento, mientras que para la autoestima, las diferencias sólo se dan en el seguimiento y aparece la relevancia de la variable tiempo transcurrido. Ninguna de las variables sociodemográficas fue significativa. En cuanto al tipo de cirugía, las mujeres tumorectomizadas tuvieron una mejor imagen corporal que las mastectomizadas.

  7. Poética da rua : estética do meio ambiente urbano em imagens de cineastas negros

    OpenAIRE

    Feitosa, Aida Rodrigues

    2016-01-01

    O presente trabalho é um esforço de elaboração de uma poética da rua a partir de imagens de filmes de cineastas negros. O objetivo é construir uma experiência visual poética singular, destacando a centralidade do espaço rua, como parte de um caminho de abertura poética às imagens fílmicas em sua relação com diferentes estéticas. Para tal investida, o referencial teórico é a fenomenologia, principalmente, a partir de estudos de Gaston Bachelard (2008) e Michel Maffesoli (2008). O recorte metod...

  8. Paraísos artificiales. La imagen drogada en la pintura europea del entresiglos XIX-XX

    OpenAIRE

    Barrón, Sofía

    2015-01-01

    Paraísos artificiales. La imagen drogada en la pintura europea del entresiglos XIX-XX. La presente investigación recopila y analiza la imagen pictórica drogada en el entresiglos XIX-XX europeo, prestando especial atención al caso español, desde la exposición descriptiva; un trabajo elaborado con voluntad de catálogo. Las conclusiones teóricas dan cuenta no sólo de que el leitmotiv tóxico puede convertirse en una temática cambiosecular en sí misma, también pone de manifiesto como el uso y ...

  9. Efectos de la imagen corporativa en el comportamiento del consumidor. Un estudio aplicado a la banca comercial

    Directory of Open Access Journals (Sweden)

    Rafael Bravo

    2011-06-01

    Full Text Available En este trabajo se analiza el efecto de las dimensiones de imagen corporativa sobre la satisfacción, compromiso y lealtad del cliente hacia su entidad bancaria, así como el efecto moderador de las variables sexo, edad y tipo de entidad en estas relaciones. A través de un estudio empírico se muestra que la dimensión relacionada con el personal es la que tiene un mayor efecto directo sobre la satisfacción y la lealtad. Asimismo, la dimensión de justicia en precios es la que tiene un mayor efecto directo sobre el compromiso. El análisis comparativo por grupos de sexo y edad señala diferencias en los efectos de algunas de las dimensiones de imagen, si bien no se observan diferencias significativas entre los bancos y las cajas de ahorros.

  10. PROPONDO CAMINHOS PARA O LETRAMENTO VISUAL: UMA LEITURA SEMIÓTICA DO LIVRO DE IMAGENS CENA DE RUA

    Directory of Open Access Journals (Sweden)

    Eduardo Lopes Piris

    2017-03-01

    Full Text Available Este trabalho visa a oferecer uma proposta de leitura de narrativas visuais aos professores de Artes e de Línguas. Para tanto, apresenta uma análise semiótica do livro de imagens intitulado Cena de Rua de autoria de Angela Lago (1994. Discute alguns problemas em torno do letramento visual no contexto escolar. Delineia um panorama do realismo crítico na literatura infantil e juvenil a fim de mostrar o contexto sócio-histórico por meio do qual emerge o discurso desse livro de magens. Analisa a expressão e o conteúdo das imagens, examinando alguns elementos dos níveis narrativo e discursivo do percurso gerativo de sentido para depreender seu sentido.

  11. La imagen transformadora. El poder de cambio social de una fotografía: la muerte de Aylan

    Directory of Open Access Journals (Sweden)

    2016-04-01

    Full Text Available Este trabajo plantea el papel de la imagen como agente de transformación social. La metodología que se emplea es un estudio de caso sobre el impacto de la fotografía de Aylan Kurdi, el niño de tres años ahogado en el intento de huida en una balsa de inmigrantes sirios en Bodrum. Se trata de uno de los documentos recientes de fotoperiodismo social más difundidos transnacionalmente y con gran impacto en redes sociales. El estudio aborda diferentes niveles de análisis (iconográfico, iconológico y ético para decapar los aspectos constitutivos de una imagen con poder de cambio social. Como principales conclusiones, esta investigación comprueba el poder de la imagen gráfica digital por su carácter de fácil reedición y resignificación en el paso de transformar simbólicamente la realidad y generar procesos de pronunciamiento y activismo en la ciudadanía a partir de entornos digitales. Los resultados del análisis del caso que se delimita muestran cómo el valor de una imagen en el cambio social no viene dado solo por la magnitud de la tragedia o el hecho que registra, ni por sus aspectos formales (iconográficos, sino por ser capaz de expresar un cambio de lógica (aspecto iconológico y propiciar procesos de reapropiación y denuncia ciudadana. Por último, el debate ético sobre su difusión traslada el problema de la deontología periodística a la responsabilidad ciudadana.

  12. Imagen, sociedad, y modernidad en el departamento de Nariño, 1870-2010

    Directory of Open Access Journals (Sweden)

    Ricardo Oviedo Arévalo

    2012-01-01

    Full Text Available El Departamento de Nariño es una entidad territorial con un rico acervo histórico escrito, demostrado por investigadores de renombre como don José Rafael Sañudo, Leopoldo López Álvarez y Jorge Elías Ortiz a través de fecundas trayectorias investigativas sobre diferentes etapas de su vida republicana. La reconstrucción de la memoria histórica y social del Departamento de Nariño por medio de la fotografía se constituye en una modalidad de investigación alternativa en el campo de las ciencias sociales cuando se plantea hacer hermenéutica de archivo para el análisis social a través la imagen, como un recurso alternativo y novedoso en la indagación social. De esta manera, la fotografía facilita los procesos de investigación, permite otro tipo de acercamientos y lecturas a través de la semiótica de la imagen, cuya práctica tiene como antecedentes disciplinares los trabajos de: Serge Gruzinski (1949- , sobre la creación de imaginarios sociales e historia de las mentalidades. De Humberto Eco (1932- con sus estudios sobre la semiótica y la estética, y Armando Silva (1998, sobre los imaginarios urbanos. La creación del Departamento de Nariño fue un proyecto tardío en la reorganización del territorio a inicio del siglo XX, con una gran influencia conservadora y religiosa, evidenciándose de manera gráfica las dificultades y los conflictos sociales del sur occidente colombiano con las características propias de multietnicidad y pluriculturidad, lo que sin embargo, contribuyó en la construcción del discurso de región a través de la imagen. De esta manera, se construyen y se relacionan tres tipos de lecturas sobre el Departamento de Nariño: la primera, referente a los contrastes de la geografía y la sociedad (Harvey, 2007, la segunda, referente al paisaje social (Appadurai, 2001, y la tercera, a los procesos de poblamiento en su territorio (Santos, 2000. La fotografía permite hacer la lectura de estas tres variables en

  13. Development of new Molecular Imaging probes; Desarrollo de nuevas sondas de Imagen Molecular

    Energy Technology Data Exchange (ETDEWEB)

    Gómez-Vallejo, V.; Baz, Z.; Llop, J.

    2014-07-01

    Nuclear Imaging techniques such as positron emission tomography (PET) and single photon emission computerized tomography (SPECT) are essential tools for the early diagnose of certain pathologies, and have been widely applied to the mechanistic investigation of disease, the visualization of biological and physiological phenomena and in the process of drug development. PET and SPECT require the administration of a radiotracer (compound labelled with a radioactive nuclide) to the subject under investigation (patient, healthy volunteer or experimental animal). Due to their high sensitivity and their noninvasive nature, nuclear imaging techniques have a great potential. However, only a few radiotracers are currently routinely used in clinical diagnose. In contrast, new tracers suitable for the visualization of new targets or showing improved specificity, selectivity or pharmacokinetic properties are continuously designed, synthesized and assayed in the preclinical setting. Far from performing an exhaustive revision of the new radiotracers currently under development, this paper aims to collate recent advances related to the preparation of novel nuclear imaging probes, which have a significant scientific impact in terms of literature volume, and which could be translated to the clinical environment in the near future. First, peptides and nanoparticles (NPs) are discussed. Finally, antibody derivatives and the recently developed pretargeting strategy, which enables the visualization of tumours while lowering significantly the effective dose posed on the subject under investigation, will be briefly covered. [Spanish] Las técnicas de imagen nuclear, entre las que se encuentran la tomografía por emisión de positrones (PET) y la tomografía por emisión de fotón único (SPECT) son herramientas fundamentales no sólo en el entorno clínico diagnóstico, sino también para el estudio mecanístico de determinadas patologías, la visualización de procesos biol

  14. Impresiones de los Mexicanos sobre la imagen país de Colombia

    Directory of Open Access Journals (Sweden)

    Lina María Echeverri Cañas

    2014-08-01

    Full Text Available La imagen país de Colombia ha sido objeto de discusión en los campos de los negocios internacionales y el marketing territorial. Colombia es un país con un posicionamiento tradicional asociado al narcotráfico y al café, situación que ha llevado a los gobiernos de la última década a definir nuevas estrategias que ayuden a mejorar la reputación del país en mercados internacionales. Sin embargo, sus esfuerzos han sido de poco impacto porque la imagen país de Colombia todavía mantiene una asociación histórica negativa resultado del narcotráfico. En este sentido, el presente artículo aborda los resultados de una investigación realizada sobre las impresiones que tienen los mexicanos que han visitado y no han visitado a Colombia. Se eligió a México porque es el segundo emisor de turistas hacia Colombia procedentes de Norteamérica. Por medio de una investigación empírica aplicada a una muestra de 190 mexicanos mayores de 18 años, se encontró que el posicionamiento se mantiene negativo y se asocia al país con drogas, terrorismo, inseguridad y corrupción. Dicha percepción contrasta con un atributo que se destaca en el estudio, y es que se asocia a Colombia con la amabilidad de su población. Los resultados del estudio se obtuvieron finalizando el 2013. Palabras clave: Asociación; Colombia; imagen país; México; percepción; visitantes.Mexicans' impressions of Colombia's country imageAbstractThe country image of Colombia has been discussed in the fields of international business and territorial marketing. Colombia is a country with a positioning associated with drug trafficking and coffee. This situation has led governments in the last decade to define new strategies to help improve Colombia’s reputation in international markets. However, its efforts have been of little impact, because the image of Colombia country still maintains negative due to its historical association. In this sense, this article discusses the results

  15. La imagen del judío en la España medieval

    Directory of Open Access Journals (Sweden)

    Enrique Cantera Montenegro

    1998-01-01

    Full Text Available Desde fechas tempranas de la Edad Media fue configurándose y difundiéndose una imagen peyorativa de los judíos, expresión de la profunda antipatía que hacia ellos sentía la población mayoritaria cristiana. La imagen del judío medieval, que fue conformada a lo largo de los siglos por los derechos civil y canónico, consiste en un estereotipo, con rasgos muy semejantes entre los diferentes ámbitos geo-históricos del Occidente europeo. Lejos de ser un reflejo fiel de la realidad, guarda una estrecha relación con el lugar que la minoría hebrea ocupaba en la conciencia colectiva cristiana medieval: de este modo, pese a que los judíos constituían un grupo heterogéneo desde los más diversos puntos de vista socio-económico, religioso o cultural, aparecían homogeneizados a través de diversos rasgos que el subconsciente de la población mayoritaria convertía en universales. Entre los rasgos que identificaban hacia el exterior a la minoría hebrea se escogían los más llamativos: determinados rasgos físicos y del carácter; el uso de ciertas prendas de vestir; el ejercicio de algunas actividades profesionales, principalmente el préstamo con interés, y la posesión de enormes riquezas; o la práctica de ciertos crímenes rituales. Esta homogeneización del grupo actuaba como un auténtico estigma, y explica en buena medida la actitud hostil hacia la minoría hebrea, tanto desde un punto de vista teórico como en la práctica. En este trabajo se analizan los distintos argumentos que conformaron la imagen del judío medieval, a su vez generadores de odio hacia la población hebrea y legitimadores de las actitudes hostiles de la población mayoritaria.Since the early beginning of the Middie Ages, the jewish bad image spread among the christian - majority population as an expression of a deep feeling of rejection towards them. The middie ages jewish image is a result of the influence of the civil and religious laws through centuries and

  16. ANALISIS DINAMIKA SEBARAN SPASIAL SEDIMENTASI MUARA SUNGAI CANTUNG MENGGUNAKAN CITRA LANDSAT MULTITEMPORAL

    Directory of Open Access Journals (Sweden)

    Zulaiha Zulaiha

    2017-01-01

    Full Text Available ABSTRACT: Given the pivotal role played by the Cantung River for the supervision and management of the public good becomes important. Incoming sediment load can damage the uncontrolled flow conditions of the Cantung river and estuary. Observations of suspended sediment can take advantage of multitemporal Landsat imagery. This study uses Landsat satellite image data corrected 5TM March 5, 1992 data acquisition path/row 117/62, Landsat data acquisition 5TM 22 May 1997 path/row 117/62, Landsat data acquisition 5TM March 27, 2000 the path/row 117/62. Several stages in processing the image, that is the conversion of DN to reflectance values, cropping, water-not water secession, and the class divide sediment concentration by density slicing technique. Spatial distribution of suspended sediment in the estuary of the Cantung River Landsat image processing results 5TM March 5, 1992, Landsat 5TM May 22, 1997, and March 27, 2000 Landsat 5TM show distribution patterns of suspended sediment from the River Cantung the same direction, that is northeast. Sediment concentrations were detected in the Landsat image processing 5TM March 5, 1992 the largest-value 27,564096 mg/l and the smallest 14,886048 mg/l. Sediment concentrations were detected in the Landsat image processing 5TM May 22, 1997 the largest-value 121,476776 mg/l and the smallest 12,647415 mg/l. Sediment concentrations were detected in the Landsat image processing 5TM March 27, 2000 most valuable 159,256704 mg/l and the smallest 10,584161 mg/l. Getting away from the effect Cantung River estuary sediment concentration of river flow Cantung tends to get smaller. Changes in the distribution area of the sediments of March 5, 1992 until March 27, 2000 amounted to 450 m2/year.   Keywords: Remote Sensing, Sedimentation, Landsat, Cantung River

  17. Música e dor crônica músculoesquelética: o potencial evocativo de imagens mentais

    Directory of Open Access Journals (Sweden)

    Leão Eliseth Ribeiro

    2004-01-01

    Full Text Available Noventa mulheres com diagnósticos de fibromialgia, lesão por esforços repetitivos/doenças osteoarticulares, relacionadas ao trabalho (LER/DORT, e afecções relacionadas à coluna vertebral foram submetidas à audição individual de três peças musicais. Os dados foram obtidos por meio de entrevista e a intensidade da dor foi avaliada pela escala numérica verbal (0-10 antes e ao término da audição musical. As imagens mentais foram quantificadas mediante a análise de desenhos realizados durante cada audição. Os três grupos apresentaram redução estatisticamente significativa da intensidade da dor ao final da audição musical (p<0,001. As imagens mentais não diferiram quantitativamente, entre Ravel e Wagner. O Mix apresentou resultados quantitativamente inferiores. As estruturas musicais se relacionaram à produção de imagens e o efeito terapêutico observado, sugerindo que análises nesse sentido podem contribuir para a utilização da música pela Enfermagem.

  18. Influencia de la imagen corporal y la autoestima en la experiencia sexual de estudiantes universitarias sin trastornos alimentarios

    Directory of Open Access Journals (Sweden)

    María Calado Otero

    2004-01-01

    Full Text Available En este estudio se evalúa la relación que tienen diversas variables de la imagen corporal cognitivas (miedo a ganar peso, distorsión de la imagen corporal e insatisfacción corporal y perceptivas (índice de masa corporal y autopercepción de atractivo junto con la autoestima sobre la actividad sexual (nivel de experiencia sexual y actividad sexual en la actualidad, edad de la primera relación sexual coital, número de parejas sexuales coitales y satisfacción de las relaciones sexuales de jóvenes universitarias gallegas. La muestra está compuesta por 325 chicas con una edad media de 19,5 años. Se concluye, a la luz de los resultados, que las variables miedo a ganar peso, insatisfacción corporal, autopercepción de atractivo físico y autoestima se relacionan con la actividad sexual; por otro lado, el índice de masa corporal y la distorsión de la imagen corporal no se relacionan con la expresión de la sexualidad. Se trata de un estudio descriptivo mediante encuestas con diseño transversal.

  19. Aborto e corporalidade: sofrimento e violência nas disputas morais através de imagens

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    Naara Luna

    2014-12-01

    Full Text Available O artigo analisa representações do aborto por meio do discurso e imagens contidas em documentários. Na controvérsia do aborto no espaço público, grupos alinhados pró-vida e pró-escolha buscam o audiovisual como meio de propagar suas mensagens políticas. A retórica visual pró-vida recorre a imagens de diferentes estágios do desenvolvimento para provar a individualidade de embriões e fetos e sua condição de pessoa dotada de direitos. O movimento pró-escolha constrói seu discurso por meio de relatos de pessoas que passaram pela experiência do aborto, enfatizando o sofrimento e a violência da criminalização e da clandestinidade. O foco é a mulher como sujeito moral. A exceção está no tópico da anencefalia, quando imagens são usadas para representar a figura do "bebê sem cérebro" inviável. A partir do sofrimento e da violência, fetos e mulheres são apresentados como vítimas pelos diferentes lados da disputa, modo de reivindicar acesso a direitos.

  20. Uma educação do olho: as imagens na sociedade urbana, industrial e de mercado

    Directory of Open Access Journals (Sweden)

    MIRANDA CARLOS EDUARDO ALBUQUERQUE

    2001-01-01

    Full Text Available Neste artigo, pretendemos pensar o processo de produção industrial de imagens como parte de um programa de educação visual, cujas origens históricas antecedem o atual desenvolvimento industrial. Nossa hipótese é de que a valoriza��ão irrefletida da produção e do consumo de imagens através de aparelhos tecnológicos reproduz e intensifica a desvalorização dos sentidos na produção de conhecimento e revaloriza o pensamento "cartesiano", educando o olho a ver o homem e o mundo conforme as possibilidades e os limites destas formas de representação da realidade. A ausência de uma atitude crítica em relação aos processos de produção destas imagens e o desconhecimento de suas origens históricas fazem com que a escola incorpore, de forma conservadora, o programa de educação visual acima referido e eduque, de forma alienada, o olho a ver a realidade.

  1. Cuerpos marcados: la imagen como documento, testimonio y crítica social

    Directory of Open Access Journals (Sweden)

    Leticia Rigat

    2015-01-01

    Full Text Available [es] El presente trabajo busca reflexionar sobre los procesos de significación de un determinado uso de la fotografía documental, sobre cómo la imagen fotográfica se emplea no sólo para construir documentación sino también como imagen testimonial y de crítica social a partir de la estetización de la representación y una particular forma de mostración del cuerpo. A partir de lo anterior, nos proponemos indagar de qué manera algunos reportajes fotográficos pueden considerarse desde un punto de vista referencial y funcional como testimonios que manifiestan la existencia de un otro en situaciones veladas de miseria, descontento y deterioro físico y/o psíquico. Se trata de producciones que más que representar los sucesos del mundo, manifiestan su existencia. No se trataría del registro del acontecimiento (relacionado al archivo, a lo noticioso, al documento y a la memoria sino de la producción de imágenes que hacen aparecer -dan a ver- situaciones veladas en formas de testimonios fotográficos. [en] This paper seeks to reflect on the processes of meaning of a particular use of documentary photography, how the photographic image is used not only to build documentation but also as witness image and social criticism from the aestheticization of representation and particular form of demonstration of the body. Taking this into consideration, we intend to research how some photographic reports can be considered from a referential and functional point of view as evidence that shows the existence of the other in situations of misery, unhappiness and physical and /or psychological deterioration. Instead of representing world events, these productions express their existence. It is not about the register of the event (related to the file, news, to document and memory but the production of images that make undercovered situations appear, in the shape of photographic testimony.

  2. Texto e imagen en España de sol a sol de Alfonso Armada

    Directory of Open Access Journals (Sweden)

    Champeau, Geneviève

    2011-06-01

    Full Text Available España de sol a sol (2001 by Alfonso Armada gives an example of the development of the «travel narrative» genre in Spain today. Faced with the «end of travel» (Marc Augé, he proposes a renovation of the perception of the familiar by travelling across Spain and Portugal and by substituting «endotic» (Georges Pérec for exotic.The poetics in the narrative differs greatly from that by travelling writers of «social realism», in the Spain of the sixties. Interpretation replaces information, the poetic image prevails over the referential function of language, and polysemy, omnipresent intertexuality and metatextuality play an important part. The change also affects the links between text and image, which are now more complementary than redundant. Playing with stereotypes, the photography actively contributes to establishing argumentative strategies meant to make the reader-viewer adhere to the message, all while affirming itself as an autonomous aesthetic experience.España de sol a sol (2001 de Alfonso Armada proporciona una muestra de la evolución del género del «libro de viajes» en la España contemporánea. Ante la imposibilidad del viaje (Marc Augé, propone renovar la percepción de lo familiar recorriendo el espacio nacional y sustituyendo el «endotismo» (Georges Pérec al exotismo. La poética del viaje que propone el relato difiere profundamente de la de los escritores viajeros del «realismo social», en la España de los años sesenta, anteponiendo la interpretación a la información, la imagen poética a la función referencial del lenguaje, cultivando la polisemia, una intertextualidad masiva y una reflexión metatextual. Distintos son también los vínculos que se establecen entre texto e imagen, de complementariedad más que de redundancia. La fotografía participa activamente, por la reelaboración de tópicos, del dispositivo argumentativo destinado a favorecer la adhesión del lector-espectador al mensaje y se afirma

  3. Spatiotemporal Variation in Mangrove Chlorophyll Concentration Using Landsat 8

    Directory of Open Access Journals (Sweden)

    Julio Pastor-Guzman

    2015-11-01

    Full Text Available There is a need to develop indicators of mangrove condition using remotely sensed data. However, remote estimation of leaf and canopy biochemical properties and vegetation condition remains challenging. In this paper, we (i tested the performance of selected hyperspectral and broad band indices to predict chlorophyll concentration (CC on mangrove leaves and (ii showed the potential of Landsat 8 for estimation of mangrove CC at the landscape level. Relative leaf CC and leaf spectral response were measured at 12 Elementary Sampling Units (ESU distributed along the northwest coast of the Yucatan Peninsula, Mexico. Linear regression models and coefficients of determination were computed to measure the association between CC and spectral response. At leaf level, the narrow band indices with the largest correlation with CC were Vogelmann indices and the MTCI (R2 > 0.5. Indices with spectral bands around the red edge (705–753 nm were more sensitive to mangrove leaf CC. At the ESU level Landsat 8 NDVI green, which uses the green band in its formulation explained most of the variation in CC (R2 > 0.8. Accuracy assessment between estimated CC and observed CC using the leave-one-out cross-validation (LOOCV method yielded a root mean squared error (RMSE = 15 mg·cm−2, and R2 = 0.703. CC maps showing the spatiotemporal variation of CC at landscape scale were created using the linear model. Our results indicate that Landsat 8 NDVI green can be employed to estimate CC in large mangrove areas where ground networks cannot be applied, and mapping techniques based on satellite data, are necessary. Furthermore, using upcoming technologies that will include two bands around the red edge such as Sentinel 2 will improve mangrove monitoring at higher spatial and temporal resolutions.

  4. Interpretasi Vulkanostratigrafi Daerah Mamuju Berdasarkan Analisis Citra Landsat-8

    Directory of Open Access Journals (Sweden)

    Frederikus Dian Indrastomo

    2015-11-01

    Full Text Available Mamuju and its surrounding area are constructed mainly by volcanic rocks. Volcanoclastic sedimentary rocks and limestones are laid above the volcanic rocks. Volcanic activities create some unique morphologies such as craters, lava domes, and pyroclastic flow paths as their volcanic products. These products are identified from their circular features characters on Landsat-8 imagery. After geometric and atmospheric corrections had been done, a visual interpretation on Landsat-8 imagery was conducted to identify structure, geomorphology, and geological condition of the area. Regional geological structures show trend to southeast – northwest direction which is affects the formation of Adang volcano. Geomorphology of the area are classified into 16 geomorphology units based on their genetic aspects, i.e Sumare fault block ridge, Mamuju cuesta ridge, Adang eruption crater, Labuhan Ranau eruption crater, Sumare eruption crater, Ampalas volcanic cone, Adang lava dome, Labuhan Ranau intrusion hill, Adang pyroclastic flow ridge, Sumare pyroclastic flow ridge, Adang volcanic remnant hills, Malunda volcanic remnant hills, Talaya volcanic remnant hills, Tapalang karst hills, Mamuju alluvium plains, and Karampuang reef terrace plains. Based on the Landsat-8 imagery interpretation result and field confirmation, the geology of Mamuju area is divided into volcanic rocks and sedimentary rocks. There are two groups of volcanic rocks; Talaya complex and Mamuju complex. The Talaya complex consists of Mambi, Malunda, and Kalukku volcanic rocks with andesitic composition, while Mamuju complex consist of Botteng, Ahu, Tapalang, Adang, Ampalas, Sumare, danLabuhanRanau volcanic rocks with andesite to leucitic basalt composition. The volcanostratigraphy of Mamuju area was constructed based on its structure, geomorphology and lithology distribution analysis. Volcanostratigraphy of Mamuju area is classified into Khuluk Talaya and Khuluk Mamuju. The Khuluk Talaya consists

  5. Propiedades Psicométricas del Cuestionario de Insatisfacción con la Imagen Corporal en estudiantes de Educación de la Universidad Nacional de Trujillo

    OpenAIRE

    Hueda Capristan, Ana Cecilia

    2016-01-01

    Se determinó Propiedades Psicométricas en el Cuestionario de Insatisfacción con la Imagen Corporal (IMAGEN) y el análisis descriptivo en alumnos de la Universidad Nacional de Trujillo. La muestra (n=576) no probabilística aleatoria de una población (N=1272) y el diseño Psicométrico. Se aplicó IMAGEN analizando las propiedades psicométricas. Los resultados, evidencian que IMAGEN presenta validez de contenido por criterio de jueces, alcanzando relevancia, claridad y coherencia. Validez de const...

  6. An Analysis LANDSAT-4 Thematic Mapper Geometric Properties

    Science.gov (United States)

    Walker, R. E.; Zobrist, A. L.; Bryant, N. A.; Gokhman, B.; Friedman, S. Z.; Logan, T. L.

    1984-01-01

    LANDSAT Thematic Mapper P-data of Washington, D. C., Harrisburg, PA, and Salton Sea, CA are analyzed to determine magnitudes and causes of error in the geometric conformity of the data to known Earth surface geometry. Several tests of data geometry are performed. Intraband and interband correlation and registration are investigated, exclusive of map based ground truth. The magnitudes and statistical trends of pixel offsets between a single band's mirror scans (due to processing procedures) are computed, and the inter-band integrity of registration is analyzed. A line to line correlation analysis is included.

  7. Post Landsat-D advanced concept evaluation /PLACE/

    Science.gov (United States)

    Alexander, L. D.; Alvarado, U. R.; Flatow, F. S.

    1979-01-01

    The aim of the Post Landsat-D Advanced Concept Evaluation (PLACE) program was to identify the key technology requirements of earth resources satellite systems for the 1985-2000 period. The program involved four efforts: (1) examination of future needs in the earth resources area, (2) creation of a space systems technology model capable of satisfying these needs, (3) identification of key technology requirements posed by this model, and (4) development of a methodology (PRISM) to assist in the priority structuring of the resulting technologies.

  8. Landsat analysis of tropical forest succession employing a terrain model

    Science.gov (United States)

    Barringer, T. H.; Robinson, V. B.; Coiner, J. C.; Bruce, R. C.

    1980-01-01

    Landsat multispectral scanner (MSS) data have yielded a dual classification of rain forest and shadow in an analysis of a semi-deciduous forest on Mindonoro Island, Philippines. Both a spatial terrain model, using a fifth side polynomial trend surface analysis for quantitatively estimating the general spatial variation in the data set, and a spectral terrain model, based on the MSS data, have been set up. A discriminant analysis, using both sets of data, has suggested that shadowing effects may be due primarily to local variations in the spectral regions and can therefore be compensated for through the decomposition of the spatial variation in both elevation and MSS data.

  9. Near Real-Time Browsable Landsat-8 Imagery

    OpenAIRE

    Cheng-Chien Liu; Ryosuke Nakamura; Ming-Hsun Ko; Tomoya Matsuo; Soushi Kato; Hsiao-Yuan Yin; Chung-Shiou Huang

    2017-01-01

    The successful launch and operation of Landsat-8 extends the remarkable 40-year acquisition of space-based land remote-sensing data. To respond quickly to emergency needs, real-time data are directly downlinked to 17 ground stations across the world on a routine basis. With a size of approximately 1 Gb per scene, however, the standard level-1 product provided by these stations is not able to serve the general public. Users would like to browse the most up-to-date and historical images of thei...

  10. Landsat Thematic Mapper monitoring of turbid inland water quality

    Science.gov (United States)

    Lathrop, Richard G., Jr.

    1992-01-01

    This study reports on an investigation of water quality calibration algorithms under turbid inland water conditions using Landsat Thematic Mapper (TM) multispectral digital data. TM data and water quality observations (total suspended solids and Secchi disk depth) were obtained near-simultaneously and related using linear regression techniques. The relationships between reflectance and water quality for Green Bay and Lake Michigan were compared with results for Yellowstone and Jackson Lakes, Wyoming. Results show similarities in the water quality-reflectance relationships, however, the algorithms derived for Green Bay - Lake Michigan cannot be extrapolated to Yellowstone and Jackson Lake conditions.

  11. Technological advances in Preclinical Molecular Imaging; Avances tecnológicos en Imagen Molecular Preclínica

    Energy Technology Data Exchange (ETDEWEB)

    Peña-Zalbidea, S.; Vaquero, J.

    2014-07-01

    Molecular imaging is undergoing an intense activity, mainly due to the availability of new detection and image reconstruction technologies, which in recent years have improved significantly both the resolution and sensitivity of these methods. The greatest potential for innovation comes from multimodality imaging, which combines information from more than one imaging technique and exploits the synergies between them. The main arguments in favour of these devices are the possibility of performing intrinsically registered scans in a minimum time and without moving the animal. Currently, the combination of PET and MRI as a hybrid imaging modality is receiving great attention and although its potential is clear, as it was with the PET/CT, this technology will have to overcome certain limitations and demonstrate its value for different applications. [Spanish] La imagen molecular es un área de investigación muy activa acelerada en los últimos años por la disponibilidad de nuevas tecnologías de detección y reconstrucción de imágenes. Estas innovaciones han permitido mejorar considerablemente tanto la resolución como la sensibilidad de las imágenes obtenidas sobre modelos preclínicos desarrollados en pequeños animales (ratón y rata principalmente). El mayor potencial de esta tecnología proviene de la imagen multimodalidad, que combina información de más de una técnica de imagen y explota las posibles sinergias entre ellas al integrar en una sola imagen “forma y función”. Los principales argumentos a favor de estos dispositivos multimodales son la posibilidad de hacer las exploraciones intrínsecamente registradas en un tiempo reducido, y sin necesidad de mover el animal entre diferentes equipos. De todas las posibles combinaciones la que está reclamando más la atención últimamente es la PET/IRM (tomografía por emisión de positrones e imagen de resonancia magnética), aunque de momento la PET/CT (tomografía por emisión de positrones y tomograf

  12. Multitemporal Snow Cover Mapping in Mountainous Terrain for Landsat Climate Data Record Development

    Science.gov (United States)

    Crawford, Christopher J.; Manson, Steven M.; Bauer, Marvin E.; Hall, Dorothy K.

    2013-01-01

    A multitemporal method to map snow cover in mountainous terrain is proposed to guide Landsat climate data record (CDR) development. The Landsat image archive including MSS, TM, and ETM+ imagery was used to construct a prototype Landsat snow cover CDR for the interior northwestern United States. Landsat snow cover CDRs are designed to capture snow-covered area (SCA) variability at discrete bi-monthly intervals that correspond to ground-based snow telemetry (SNOTEL) snow-water-equivalent (SWE) measurements. The June 1 bi-monthly interval was selected for initial CDR development, and was based on peak snowmelt timing for this mountainous region. Fifty-four Landsat images from 1975 to 2011 were preprocessed that included image registration, top-of-the-atmosphere (TOA) reflectance conversion, cloud and shadow masking, and topographic normalization. Snow covered pixels were retrieved using the normalized difference snow index (NDSI) and unsupervised classification, and pixels having greater (less) than 50% snow cover were classified presence (absence). A normalized SCA equation was derived to independently estimate SCA given missing image coverage and cloud-shadow contamination. Relative frequency maps of missing pixels were assembled to assess whether systematic biases were embedded within this Landsat CDR. Our results suggest that it is possible to confidently estimate historical bi-monthly SCA from partially cloudy Landsat images. This multitemporal method is intended to guide Landsat CDR development for freshwaterscarce regions of the western US to monitor climate-driven changes in mountain snowpack extent.

  13. Shape selection in Landsat time series: A tool for monitoring forest dynamics

    Science.gov (United States)

    Gretchen G. Moisen; Mary C. Meyer; Todd A. Schroeder; Xiyue Liao; Karen G. Schleeweis; Elizabeth A. Freeman; Chris Toney

    2016-01-01

    We present a new methodology for fitting nonparametric shape-restricted regression splines to time series of Landsat imagery for the purpose of modeling, mapping, and monitoring annual forest disturbance dynamics over nearly three decades. For each pixel and spectral band or index of choice in temporal Landsat data, our method delivers a smoothed rendition of...

  14. Validating gap-filling of Landsat ETM+ satellite images in the Golestan Province, Iran

    NARCIS (Netherlands)

    Mohammdy, M.; Moradi, H.R.; Zeinivand, H.; Temme, A.J.A.M.; Pourghasemi, H.R.; Alizadeh, H.

    2014-01-01

    The Landsat series of satellites provides a valuable data source for land surface mapping and monitoring. Unfortunately, the scan line corrector (SLC) of the Landsat7 Enhanced Thematic Mapper plus (ETM+) sensor failed on May 13, 2003. This problem resulted in about 22 % of the pixels per scene not

  15. Opening the archive: how free data has enabled the science and monitoring promise of Landsat

    Science.gov (United States)

    Michael A. Wulder; Jeffrey G. Masek; Warren B. Cohen; Thomas R. Loveland; Curtis E. Woodcock

    2012-01-01

    Landsat occupies a unique position in the constellation of civilian earth observation satellites, with a long and rich scientific and applications heritage. With nearly 40 years of continuous observation—since launch of the first satellite in 1972—the Landsat program has benefited from insightful technical specification, robust engineering, and the necessary...

  16. Harmonic analysis of dense time series of landsat imagery for modeling change in forest conditions

    Science.gov (United States)

    Barry Tyler. Wilson

    2015-01-01

    This study examined the utility of dense time series of Landsat imagery for small area estimation and mapping of change in forest conditions over time. The study area was a region in north central Wisconsin for which Landsat 7 ETM+ imagery and field measurements from the Forest Inventory and Analysis program are available for the decade of 2003 to 2012. For the periods...

  17. Regional analysis of Landsat data concerning unconformity-vein uranium deposits, Pine Creek Geosyncline, Australia

    International Nuclear Information System (INIS)

    Raines, G.L.

    1982-01-01

    Linear features mapped from enhanced Landsat images in zones defining lineaments trending northeast and east-northeast across the uranium area of northern Australia. A model using Landsat data to select areas for uranium exploration is proposed, based on the observed spatial relation of uranium deposits and the newly defined major lineaments

  18. Using Landsat-derived disturbance history (1972-2010) to predict current forest structure

    Science.gov (United States)

    Dirk Pflugmacher; Warren B. Cohen; Robert E. Kennedy

    2012-01-01

    Lidar is currently the most accurate method for remote estimation of forest structure, but it has limited spatial and temporal coverage. Conversely, Landsat data are more widely available, but exhibit a weaker relationship with structure under medium to high leaf area conditions. One potentially valuable means of enhancing the relationship between Landsat reflectance...

  19. Continuous fields of land cover for the conterminous United States using Landsat data: First results from the Web-Enabled Landsat Data (WELD) project

    Science.gov (United States)

    Hansen, M.C.; Egorov, Alexey; Roy, David P.; Potapov, P.; Ju, J.; Turubanova, S.; Kommareddy, I.; Loveland, Thomas R.

    2011-01-01

    Vegetation Continuous Field (VCF) layers of 30 m percent tree cover, bare ground, other vegetation and probability of water were derived for the conterminous United States (CONUS) using Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data sets from the Web-Enabled Landsat Data (WELD) project. Turnkey approaches to land cover characterization were enabled due to the systematic WELD Landsat processing, including conversion of digital numbers to calibrated top of atmosphere reflectance and brightness temperature, cloud masking, reprojection into a continental map projection and temporal compositing. Annual, seasonal and monthly WELD composites for 2008 were used as spectral inputs to a bagged regression and classification tree procedure using a large training data set derived from very high spatial resolution imagery and available ancillary data. The results illustrate the ability to perform Landsat land cover characterizations at continental scales that are internally consistent while retaining local spatial and thematic detail.

  20. Transformada fraccional de Fourier en el caso de un plano imagen inclinado Fraccional Fourier transform in the case of an inclined image plane

    Directory of Open Access Journals (Sweden)

    Y Torres

    2010-12-01

    Full Text Available La conocida fórmula de difracción de Fresnel relaciona la distribución de amplitud compleja de una onda en el plano objeto (campo ondulatorio de entrada con la distribución de amplitud compleja de la onda en el plano imagen(campo ondulatorio de salida cuando se trata de propagación en el espaciolibre; esto significa que si los planos objeto e imagen son paralelos entre sí, el sistema imagen correspondiente se dice que es un sistema lineal invariantea desplazamiento (LSI. Esta propiedad ventajosa es esencial para el desarrollo de técnicas de imagen sensitivas a fase; sin embargo, si el plano imagen está inclinado con respecto al haz incidente, la distancia efectiva de propagación cambiará sobre el plano imagen, consecuentemente el sistema imagen será no invariante a desplazamiento. En este artículo es propuesta una extensión del formalismo de la difracción de Fresnel al caso de un plano imageninclinado utilizando la transformada de Fourier de orden fraccional.The well-known Fresnel integral relates a known complex wave defined in the object plane (the input wave field to the observable complex wave (the output wave field defined in the image plane after free-space propagation; this means that if the object and image plane are parallel to each other, corresponding imaging system is said to be linear-shift-invariant (LSI. This advantageous property was essential for the development of phase sensitive imaging techniques; however, if the image plane is inclined with respect to the incident beam, the effective propagation distance will vary over the image plane, consequently, the imaging system is not shiftinvariant. In this paper an extension of the theoretical formalism of Fresnel diffraction to the case of an inclined image plane is proposed using the fractional Fourier transform.

  1. UNIVERSIDAD NACIONAL EXPERIMENTAL “RAFAEL MARÍA BARALT”: IMAGEN CORPORATIVA EXTERNA

    Directory of Open Access Journals (Sweden)

    Julio Rafael Pire Morales

    2014-04-01

    Full Text Available El estudio tuvo como propósito describir la Universidad Nacional Experimental “Rafael María Baralt” desde su imagen corporativa externa en el municipio Miranda estado Zulia. El estudio fue de carácter descriptivo, con diseño no experimental transversal cuya población estuvo conformada por 2 grupos 18 sujetos denominados comerciantes del sector productivo y 384 jefes de las familias que habitan el 13 sectores de la Parroquia Altagracia, municipio Miranda a quienes se les aplicó un instrumento cuestionario de doble versión tipo Likert, cuya confiabilidad se alcanzó con la realización de una prueba piloto a 20 sujetos obteniendo un alfa cronbach de 0,8494. El análisis de los resultados se llevó a cabo con una estadística descriptiva a través de frecuencia absoluta y relativa tal como se observa en el siguiente apartado. Como conclusiones se resaltó. Los públicos responden tener una actitud positiva cuando opinan que la UNERMB ha contribuido en el desarrollo del Municipio Miranda y mejorado la calidad de vida de sus habitantes, al tiempo que la comunidad se siente orgullosa de contar con esta institución en el municipio Miranda.

  2. Imagen de responsabilidad social: factores competitivos que influyen en el comportamiento del consumidor

    Directory of Open Access Journals (Sweden)

    Ma. Cristina Pacheco Ornelas

    2016-03-01

    Full Text Available Estudios señalan que el comportamiento responsable de una empresa ejerce una conexión consumidor-empresa que influye en sus relaciones de consumo. El propósito en este trabajo es evaluar si la imagen de responsabilidad social (iRs medida mediante los factores: ética, credibilidad, reputación y transparencia tiene efecto en el comportamiento del consumidor, tanto en la identificación consumidor-empresa (C-E como en la decisión de compra. El estudio empírico se realizó en una muestra de 195 consumidores de las ciudades de Guadalajara y Zapopan, Jalisco. Los datos se analizaron mediante modelos estructurales utilizando el método de máxima verosimilitud logit. Los hallazgos revelan factores y componentes de la iRs que son muy significativos en la identificación C-E y en el comportamiento de decisión de compra, los cuales representan una guía de acciones con que distintos sectores de negocios pueden construir una sólida iRs que sea fuente de ventaja competitiva ante competidores globales

  3. La imagen de la migración calificada en América del Norte

    Directory of Open Access Journals (Sweden)

    Camelia TIGAU

    2015-01-01

    Full Text Available Este artículo analiza la migración calificada en América del Norte desde la perspec-tiva de la comunicación de riesgo, con base en el análisis narrativo de 241 artículos publicados en el 2012-2013 en periódicos mexicanos, estadounidenses y canadien-ses. Mientras que los medios mexicanos advierten sobre los riesgos de la migración calificada, los estadounidenses construyen la imagen de los inmigrantes como una posible amenaza para la economía del país. Los medios canadienses destacan la es-casez de mano de obra calificada en Canadá, a la vez que lamentan los efectos de la fuga de cerebros en ese país. De esta forma, la comunicación de riesgo sobre la fuga de cerebros crea una agenda de problemas a ser considerados en las políticas públicas nacionales y los acuerdos regionales.

  4. Mujer y teología: la cuestión de la imagen de Dios

    Directory of Open Access Journals (Sweden)

    Castilla de Cortázar, Blanca

    2016-04-01

    Full Text Available The question of the image of God, described in the book of Genesis, is a long-standing theological issue. Although there has been some progress in this regard in recent decades, particularly in relation to the theology of women, there is still work to be done. In this paper, after a brief iter on the progress on this matter, we take a closer look at Karol Wojtyla’s novel proposal in his magnum opus: The theology of the body, analyzing his method, starting points and main consequences. We conclude by pointing out the tasks ahead.La cuestión de la imagen de Dios, afirmada en el libro del Génesis, es un tema teológico con amplio recorrido, acerca del cual se ha avanzado en las últimas décadas, en relación con la teología de la mujer, tarea aún pendiente. En el presente trabajo, tras un breve iter en torno al progreso de esta cuestión, nos detendremos a analizar la novedosa propuesta de Karol Wojtyla en su obra magna: La teología del cuerpo, analizando su método, sus puntos de partida y sus principales consecuencias, para concluir señalando las tareas pendientes.

  5. La imagen en el cuerpo urbano. La transformación de Madrid hacia el consumo

    Directory of Open Access Journals (Sweden)

    Daniel Morcillo Álvarez

    2017-05-01

    Full Text Available El neoliberalismo ha supuesto una transformación en la conceptualización de las clases sociales y una reconfiguración de las relaciones entre ellas. En tal sentido, ha emprendido un cambio en los centros urbanos, intensificando su uso comercial y turístico a partir de la inversión pública en la imagen de la ciudad. En Madrid, entre los años 1998 y 2007, de hegemonía neoliberal, se ha invertido, precisamente, en proyectos que han cambiado la escena urbana, reforzando el carácter fetichista del espacio y fomentando, con ello, el reforzamiento de los valores de excelencia y prestigio social. A partir del análisis de la inversión pública en proyectos de escena urbana, se procede a estudiar aquí los efectos que las peatonalizaciones y semipeatonalizaciones han tenido en la conceptualización del centro de Madrid, en los años de máxima expansión neoliberal.

  6. La imagen del turismo cultural en Cuba percibida por el mercado español

    Directory of Open Access Journals (Sweden)

    Yamilé Pérez Guilarte

    2015-06-01

    Full Text Available El turismo cultural, percibido no solo como las visitas a sitios y monumentos históricos, sino ampliado al conocimiento de la forma de vida y tradiciones de las poblaciones locales, podría constituir una importante alternativa para Cuba. La presente investigación tiene como objetivos determinar si Cuba es apreciada como un destino cultural desde la perspectiva del mercado español e identificar cuáles son sus elementos distintivos. Por medio de un cuestionario realizado a 400 españoles, se evalúan los dos componentes de la imagen de un destino: el cognitivo y el afectivo. El estudio revela una preferencia por el turismo cultural y señala a la gente, la música, al Centro Histórico de La Habana y el estilo de vida como los elementos distintivos de Cuba. Estos resultados contribuyen a un diseño más efectivo de la promoción turística en el mercado español, aunque se recomienda ampliar el estudio a otros mercados potenciales.

  7. Ut Pictura Poesis : dialéctica entre palabras e imagen en Sir William Sterling Maxwell

    Directory of Open Access Journals (Sweden)

    Hilary Macartney

    2002-01-01

    Full Text Available En el presente artículo se analiza la estrecha relación entre la historia del arte de Sir William Stirling Maxwell, su biblioteca y su colección artística. Este vínculo encierra la clave para la comprensión de su excepcional aportación a la historiografía del arte español. Sus diversas actividades, como historiador del arte, coleccionista de libros y cuadros, y director de ediciones privadas de libros raros, fueron todas manifestaciones de su gran fascinación por el paralelo entre la literatura y el arte, la palabra y la imagen. Tal relación se encuentra incluso en el esquema decorativo de su biblioteca.This article examines the remarkable unity between Sir William Stirling Maxwell's art history, his library and his art collection and argües that this relationship is the key to understanding his unique contribution to scholarship of Spanish art. In particular, it will be shown that his actlvities as an art historian, bibliophile, art collector and editor of prívate editions of rare books were all expressions of his fascination with the relationship between literature and art in general, and more specifically between word and image. Even the decorative scheme of his library emphasised this relationship.

  8. Líderes, imagen pública y medios de comunicación social

    Directory of Open Access Journals (Sweden)

    Dr. Iván Abreu Sojo

    1998-01-01

    Full Text Available El tema del liderazgo es uno del mayor interés para Venezuela, y estimamos que para la región y el mundo entero, en estos momentos. Los medios de comunicación en mi país han "puesto en agenda" el asunto, de acuerdo con la gran cantidad de artículos y reportajes que en los últimos años se han venido publicando. Ante la situación del país, caracterizada por una ya larga crisis, el factor liderazgo aparece como crítico a la hora de buscar explicaciones a nuestros males. En este resumen se pasa revista a un diagnóstico sobre el tema, se realizan algunas consideraciones sobre el fenómeno del liderazgo, se analizan los resultados de una investigación sobre el liderazgo carismático en Venezuela y se discute sobre el liderazgo y la imagen pública, concluyendo en el análisis del liderazgo necesario.

  9. Integrating Landsat-derived disturbance maps with FIA inventory data: Applications for state-Level forest resource assessments

    Science.gov (United States)

    Sonja Oswalt; Chengquan Huang; Hua Shi; James Vogelmann; Zhiliang Zhu; Samuel N. Goward; John Coulston

    2009-01-01

    Landsat images have been widely used for assessing forest characteristics and dynamics. Recently, significant progress has been made towards indepth exploration of the rich Landsat archive kept by the U.S. Geological Survey to improve our under standing of forest disturbance and recovery processes. In this study, we used Landsat images to map forest disturbances at...

  10. Water Feature Extraction and Change Detection Using Multitemporal Landsat Imagery

    Directory of Open Access Journals (Sweden)

    Komeil Rokni

    2014-05-01

    Full Text Available Lake Urmia is the 20th largest lake and the second largest hyper saline lake (before September 2010 in the world. It is also the largest inland body of salt water in the Middle East. Nevertheless, the lake has been in a critical situation in recent years due to decreasing surface water and increasing salinity. This study modeled the spatiotemporal changes of Lake Urmia in the period 2000–2013 using the multi-temporal Landsat 5-TM, 7-ETM+ and 8-OLI images. In doing so, the applicability of different satellite-derived indexes including Normalized Difference Water Index (NDWI, Modified NDWI (MNDWI, Normalized Difference Moisture Index (NDMI, Water Ratio Index (WRI, Normalized Difference Vegetation Index (NDVI, and Automated Water Extraction Index (AWEI were investigated for the extraction of surface water from Landsat data. Overall, the NDWI was found superior to other indexes and hence it was used to model the spatiotemporal changes of the lake. In addition, a new approach based on Principal Components of multi-temporal NDWI (NDWI-PCs was proposed and evaluated for surface water change detection. The results indicate an intense decreasing trend in Lake Urmia surface area in the period 2000–2013, especially between 2010 and 2013 when the lake lost about one third of its surface area compared to the year 2000. The results illustrate the effectiveness of the NDWI-PCs approach for surface water change detection, especially in detecting the changes between two and three different times, simultaneously.

  11. LANDSAT-8 OPERATIONAL LAND IMAGER CHANGE DETECTION ANALYSIS

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    W. Pervez

    2017-05-01

    Full Text Available This paper investigated the potential utility of Landsat-8 Operational Land Imager (OLI for change detection analysis and mapping application because of its superior technical design to previous Landsat series. The OLI SVM classified data was successfully classified with regard to all six test classes (i.e., bare land, built-up land, mixed trees, bushes, dam water and channel water. OLI support vector machine (SVM classified data for the four seasons (i.e., spring, autumn, winter, and summer was used to change detection results of six cases: (1 winter to spring which resulted reduction in dam water mapping and increases of bushes; (2 winter to summer which resulted reduction in dam water mapping and increase of vegetation; (3 winter to autumn which resulted increase in dam water mapping; (4 spring to summer which resulted reduction of vegetation and shallow water; (5 spring to autumn which resulted decrease of vegetation; and (6 summer to autumn which resulted increase of bushes and vegetation . OLI SVM classified data resulted higher overall accuracy and kappa coefficient and thus found suitable for change detection analysis.

  12. Study of the Nevada Test Site using Landsat satellite imagery

    International Nuclear Information System (INIS)

    Zimmerman, P.D.

    1993-07-01

    In the period covered by the purchase order CSIS has obtained one Landsat image and determined that two images previously supplied to the principal investigator under a subcontract with George Washington University were inherently defective. We have negotiated with EOSAT over the reprocessing of those scenes and anticipate final delivery within the next few weeks. A critical early purchase during the subcontract period was of an EXABYTE tape drive, Adaptec SCSI interface, and the appropriate software with which to read Landsat images at CSIS. This gives us the capability of reading and manipulating imagery in house without reliance on outside services which have not proven satisfactory. In addition to obtaining imagery for the study, we have also performed considerable analytic work on the newly and previously purchased images. A technique developed under an earlier subcontract for identifying underground nuclear tests at Pahute Mesa has been significantly refined, and similar techniques were applied to the summit of Rainier Mesa and to the Yucca Flats area. An entirely new technique for enhancing the spectral signatures of different regions of NTS was recently developed, and appears to have great promise of success

  13. Landsat surface reflectance quality assurance extraction (version 1.7)

    Science.gov (United States)

    Jones, J.W.; Starbuck, M.J.; Jenkerson, Calli B.

    2013-01-01

    The U.S. Geological Survey (USGS) Land Remote Sensing Program is developing an operational capability to produce Climate Data Records (CDRs) and Essential Climate Variables (ECVs) from the Landsat Archive to support a wide variety of science and resource management activities from regional to global scale. The USGS Earth Resources Observation and Science (EROS) Center is charged with prototyping systems and software to generate these high-level data products. Various USGS Geographic Science Centers are charged with particular ECV algorithm development and (or) selection as well as the evaluation and application demonstration of various USGS CDRs and ECVs. Because it is a foundation for many other ECVs, the first CDR in development is the Landsat Surface Reflectance Product (LSRP). The LSRP incorporates data quality information in a bit-packed structure that is not readily accessible without postprocessing services performed by the user. This document describes two general methods of LSRP quality-data extraction for use in image processing systems. Helpful hints for the installation and use of software originally developed for manipulation of Hierarchical Data Format (HDF) produced through the National Aeronautics and Space Administration (NASA) Earth Observing System are first provided for users who wish to extract quality data into separate HDF files. Next, steps follow to incorporate these extracted data into an image processing system. Finally, an alternative example is illustrated in which the data are extracted within a particular image processing system.

  14. Imagen social de las enfermeras y estrategias de comunicación pública para conseguir una imagen positiva Social image of nursing and public communication satrategies to obtain a positive image

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    Manuel Ángel Calvo Calvo

    2011-09-01

    Full Text Available La identidad o esencia de las enfermeras no coincide con su imagen social pues continua plagada de estereotipos, y el público sigue percibiendo una imagen dependiente y poco profesional de las enfermeras. Esa discordancia entre identidad e imagen, en parte se debe a que las propias enfermeras no se han preocupado suficientemente, de modo individual y colectivo, por comunicar eficazmente su verdadera identidad a la sociedad. Y para transmitir la identidad de las enfermeras estas deben comunicar a la sociedad su función y quehacer, para lo cual conviene que las instituciones enfermeras cuenten con gabinetes de comunicación eficientes y bien estructurados, y que las enfermeras integren en su práctica profesional el uso de recursos de la comunicación pública, tales como aplicar las nuevas tecnologías en su práctica diaria, difundir científica y masivamente su producción intelectual, divulgarla e informar a los medios de actividades enfermeras susceptibles de convertirse en producto informativo.The identity or essence of nursing does not match their social image as this profession continues to be full of stereotypes and the general public still retains the idea of dependence and lack of professionalism of nurses. This lack of concordance between image and identity is partly due to the fact that nurses themselves have not cared enough, both individually and as a group, to communicate effectively their true identity to society. In order to transmit the identity of nursing, these professionals must explain their tasks and functions to society. In this sense, nursing institutions should have at their disposal efficient and well organized communication departments. Also, nurses should include in their daily practice the use of public communication resources such as the application of ITCs to their tasks, the mass divulgation of their intellectual production in scientific publications, the broadcasting of nursing activities which could become

  15. Evolução e mapeamento do uso da terra, através de imagens aerofotogramétricas e orbitais em Santa Bárbara D'Oeste (SP Land use mapping and evolution through aerial photographs and orbital images, in Santa Bárbara D'Oeste (SP

    Directory of Open Access Journals (Sweden)

    M.H. Borges

    1993-12-01

    Full Text Available Em Santa Bárbara D'Oeste,SP, foram realizados dois mapeamentos do uso da terra em área de 14.625 ha. No primeiro utilizou-se fotografias aéreas verticais pancromáticas (data de 25/6/78, na escala 1:35.000, e no segundo utilizou-se imagens orbitais do satélite LANDSAT-5 com sensor "Thematic Mapper" (data de 12/8/91, escala 1: 100.000, nas bandas 3, 4 e 5 e composição colorida 3/4/5. Para auxiliar a confecção desses mapas, obteve-se chaves de interpretação, tanto para as aerofotos como para as imagens orbitais. As fotografias aéreas proporcionaram um maior nível de detalhamento na identificação do uso da terra. A banda 3 e a composição colorida 3/4/5 foram as mais eficientes entre as imagens orbitais. Entre 1978 e 1991, a área de ocorrência de cana-de-açúcar permaneceu a mesma, as áreas de mata e pastagem diminuíram, enquanto que as áreas de reflorestamento e urbana aumentaram. Essa região teve sua capacidade de uso enquadrada, na maior parte, na classe IV: terras mais apropriadas para pastagens ou plantas perenes como a cana-de-açúcar, devendo-se aplicar técnicas intensivas de conservação, e com aptidão baseada em práticas agrícolas que refletem um alto nível tecnológico.Land use was studied in Santa Bárbara D'Oeste,SP in an area of 14,625 ha. Two land use mappings were made using pancromatic aerial photographs (date 25/6/78, in a scale of 1:35,000 and orbital images from LANDSAT-5 satellite (date 12/8/91 in a scale 1:100,000, at bands 3, 4 and 5 and color composition 3/4/5. Interpretation keys for aerial photos and orbital images were established to assist map making. For land use identification photos presented more details. On the other hand, orbital images at band 3 and color composition 3/4/5 were more efficient in relation to the other bands. Sugar cane crop area did not change in the studied period (1978-1991, forest and pasture areas had a reduction and urban areas increased. Using the land capability

  16. Muerte, límite y necesidad frente a la imagen cultural del hombre

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    Ricardo SANMARTÍN ARCE

    2009-11-01

    Full Text Available RESUMEN: La muerte es el límite radical y natural por excelencia y su conciencia hace replantearse el sentido de la vida. Aunque la gente no suele hablar de la muerte —la tendencia es evitarlo— las representaciones culturales de la vida y la muerte son dos caras de la misma moneda, y en ellas subyace la imagen del hombre encarnada en la acción de cada día. El artículo trata sobre dichas imágenes tal como han sido inferidas a partir de la observación etnográfica en Madrid, tras el 11 de marzo, entre profesionales de la educación y hospitales, así como de las confesiones personales de distintos escritores enfrentados a su propia enfermedad final o ante un gran peligro. La imagen expansiva, creciente y sempiterna de la vida en la cultura actual, contrasta poderosamente con la experiencia de la enfermedad y la muerte, en la cual la limitación y la necesidad despiertan la búsqueda de trascendencia.ABSTRACT: Death is the radical and natural limit par excellence, and being aware of that makes oneself to rethink the sense of the whole life. Althoug people do not usually speak about death —in fact, the tendency is to avoid it— cultural representations of life and death are two faces of the same coin, and the cultural image of man rests in them embodied in daily action. The article deals with such images as they have been infered from ethnographic observation in Madrid, after March 11th, among professionals of education and hospitals, and from personal confessions of various writers faced against their final illness or a great danger. The everlasting, evergrowing and expansive image of life in present culture sharply contrasts with the experience of illness and death, in which limit and necessity arouse the quest for transcendence.SOMMAIRE: La mort est, par excellence, la limite radicale et naturelle et sa conscience fait repenser le sens de la vie entière. Si bien les gens n'ont pas l'habitude de parler sur la mort —plus bien, la

  17. Paisaje e imagen: formas y herencias en la construcción cultural del territorio agrario

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    Prada Llorente, Esther Isabel

    2013-12-01

    Full Text Available The history of rural areas gives rise, as a result of interaction between residents and the environment, to a dense network of permanencies, distributed along a scale ranging from the domestic to the territorial. This amounts to forms unfolding as landscape, both in terms of significant image and living heritage. Three municipalities in the Western Spanish Meseta are analyzed with the help of images, historical records and local enquiries. The cases selected show in different degrees the influence of land consolidation policies. The agrarian system, at the territorial, urban and architectonic scales, is scanned in search of the key elements of landscape character. Different tools are combined: direct questionnaires, archival research and a reflective form-interpretation by means of drawing, as well as advanced land mapping and photographing. The outcomes are a taxonomy of evolutive responses to land use, an array of detected landscape values and the determination of landscape character, leading to innovative proposals for rural land planning policy.La historia del espacio agrario, merced a la interacción entre pobladores y medio, genera una rica red de permanencias, en escalas que van de lo territorial a lo doméstico: un despliegue formal como paisaje, entendido como imagen significativa y patrimonio vivo. A través de la imagen, la documentación antigua y el estudio del territorio se analizan tres términos municipales del Occidente mesetario, Destriana, Escuadro y Brincones. Los casos elegidos muestran de forma diferenciada el influjo de la concentración parcelaria. El sistema agrario, en sus escalas territorial, urbana y arquitectónica, es escudriñado en busca de las claves del carácter paisajístico, mediante la encuesta oral, el registro documental, la interpretación reflexiva a través del dibujo, y las técnicas cartográficas y fotogramétricas avanzadas. La diversidad de respuestas evolutivas ante la gestión del medio, el

  18. La imagen en el tiempo: el uso de las fuentes visuales en Historia

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    Mario Díaz Barrado

    2012-10-01

    Full Text Available La Imagen puede ser soporte del discurso -al mismo nivel que la palabra-, en el entorno de la disciplina histórica. Los tiempos actuales exigen superar la prevención ante el uso de fuentes visuales para conformar relatos. El exceso de información, la desatención y la espectacularidad, contribuyen a banalizar los retos científicos. Este trabajo intenta partir del legado visual fotográfico, para abordar el reto de desarrollar discursos visuales que sirvan para el explicar el pasado como se hace con la palabra, aunque la naturaleza diferente de las fuentes visuales exige que esos discursos se desarrollen en el nuevo entorno digital. La fotografía resulta una fuente básica para el trabajo del historiador, mucho más si se sistematizan y conceptualizan los principios que sustentan su empleo en historia. Partiendo de las percepciones visuales que la fotografía logra desde su aparición en el siglo XIX, pasando por su consolidación social con el fotoperiodismo en el siglo XX, la tesis final del trabajo plantea reutilizar los fragmentos fotográficos que conforman la memoria de la humanidad en los dos últimos siglos, para volcarlos en el soporte digital y desarrollar así el discurso histórico visual del siglo XXI.Palabras clave: Imagen, historia, discurso, fotografía, soporte digital.________________________Abstract:Images can be the support of discourse —in the same way as words—  in the discipline of history. The present time demands from us the overcoming of any impediment against the use of visual sources to shape a historical account. Excessive information, inattention and an inclination towards spectacular effects contribute to trivialize scientific challenges.  This study stems from the visual photographic legacy in order to face the challenge to develop visual discourses which are able to explain the past in the same way words do, although the different nature of the visual sources demand those discourses to be developed

  19. Otimização de imagens mamográficas Optimization of mammographic images

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    Diana Rodrigues de Pina

    2006-10-01

    Full Text Available OBJETIVO: Este trabalho tem como objetivo a otimização de imagens mamográficas, com consideráveis reduções de doses. MATERIAIS E MÉTODOS: Neste estudo o feixe de raios-X foi calibrado para cada tensão (kVp, de modo a determinar a melhor combinação de kVp e mAs que irá proporcionar uma densidade ótica (DO em torno de 1.0 acima da base mais véu do filme utilizado. RESULTADOS: Serão discutidas questões sobre os métodos empregados para a seleção de parâmetros de exposição do feixe de raios-X, seleção da melhor imagem utilizando o método de avaliação gradativa visual, comparações entre as doses e carga do tubo (kVp × mAs proporcionadas pelas técnicas determinadas neste estudo e pelas utilizadas na rotina clínica do Serviço de Diagnóstico por Imagem do Hospital das Clínicas da Faculdade de Medicina de Botucatu. Neste estudo foram obtidas imagens radiográficas de mama de excelente qualidade, com redução de dose e carga de tubo, respectivamente, de 36,8% e 46,2%, quando comparadas com a técnica utilizada pela rotina clínica da instituição. CONCLUSÃO: Esta pesquisa vem contribuir com a otimização da relação risco-benefício para o paciente e custo-benefício para a instituição.OBJECTIVE: The aim of this study is the optimization of mammographic images with a considerable radiation dose reduction. MATERIALS AND METHODS: In the present study the X-ray beam was calibrated for each tension (kVp, aiming at determining the best combination between kVp and mAs, resulting in optical densities of about 1.0 above the base-plus-fog density. RESULTS: This study will bring into question the methods for X-ray beam calibration, the choice of the best image by means of visual grading analysis, comparisons between doses and tube load (kVp × mAs delivered by the techniques described in this study and by those adopted in the clinical routine at Service of Diagnostic Imaging of Faculdade de Medicina de Botucatu Clinics

  20. From Landsat through SLI: Ball Aerospace Instrument Architecture for Earth Surface Monitoring

    Science.gov (United States)

    Wamsley, P. R.; Gilmore, A. S.; Malone, K. J.; Kampe, T. U.; Good, W. S.

    2017-12-01

    The Landsat legacy spans more than forty years of moderate resolution, multi-spectral imaging of the Earth's surface. Applications for Landsat data include global environmental change, disaster planning and recovery, crop and natural resource management, and glaciology. In recent years, coastal water science has been greatly enhanced by the outstanding on-orbit performance of Landsat 8. Ball Aerospace designed and built the Operational Land Imager (OLI) instrument on Landsat 8, and is in the process of building OLI 2 for Landsat 9. Both of these instruments have the same design however improved performance is expected from OLI 2 due to greater image bit depth (14 bit on OLI 2 vs 12 bit on OLI). Ball Aerospace is currently working on two novel instrument architectures applicable to Sustainable Land Imaging for Landsat 10 and beyond. With increased budget constraints probable for future missions, technological improvements must be included in future instrument architectures to enable increased capabilities at lower cost. Ball presents the instrument architectures and associated capabilities enabling new science in past, current, and future Landsat missions.

  1. Linfoma renal: espectro de imagens na tomografia computadorizada Renal lymphoma: spectrum of computed tomography findings

    Directory of Open Access Journals (Sweden)

    Carol Pontes de Miranda Maranhão

    2005-04-01

    Full Text Available O acometimento renal no linfoma é raro, uma vez que o rim não possui tecido linfóide. O envolvimento secundário é mais freqüente, ocorrendo em até um terço das autópsias dos portadores de linfoma. Alguns autores acreditam que esta seja a única forma de acometimento renal, questionando a existência do linfoma primário. O linfoma renal representaria metástases hematogênicas ou invasão direta do tumor ocorrendo no espaço perirrenal. A partir destes tipos de envolvimento decorrem as formas de apresentação do linfoma renal: múltiplos nódulos, massa solitária, invasão renal por doença retroperitoneal contígua, doença perirrenal e infiltração difusa. Neste trabalho são discutidas e apresentadas imagens destas diferentes formas de acometimento.Isolated renal lymphoma is rare due to the absence of lymphoid tissue in kidneys. Secondary involvement occurs more frequently and is reported in up to 1/3 of the autopsies of patients who died from lymphoma. Some authors believe this is actually the only existing form of renal lymphoma. The involvement of the kidney by lymphoma would occur through hematogenic metastasis or direct tumor invasion of the perirenal space. These different types of involvement determine the several forms of renal lymphoma presentation: multiple nodules, solitary mass, renal invasion from contiguous retroperitoneal disease, perirenal disease and diffuse infiltration. In this study the imaging findings features of the different forms of involvement are presented and discussed.

  2. Ptose palpebral: avaliação do posicionamento palpebral por imagens digitais

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    Taisa Bertocco Carregal

    2012-02-01

    Full Text Available OBJETIVO: Avaliar a posição palpebral de portadores de ptose congênita e adquirida, procurando identificar diferenças entre elas. MÉTODOS: Foi realizada avaliação retrospectiva de portadores de ptose palpebral atendidos no Ambulatório de Plástica Ocular da Faculdade de Medicina de Botucatu-UNESP, no período de 1995 a 2006, com dados recuperados de fichas de atendimento e de arquivo de imagens digitais. Foram avaliados dados de 87 pacientes, como idade, sexo e dados relativos à ptose. As ptoses foram separadas em dois grandes grupos: congênita e adquirida. Foram realizadas medidas digitais da distância margem-reflexo (DMR, distância margem-sulco palpebral superior (DMSC e distância margem supercílio (DMSP. A unidade de medida considerada foi o diâmetro corneano de cada um dos indivíduos. Todos os dados foram transferidos para tabela Excel e receberam análise estatística. RESULTADOS: A análise mostrou que não existe associação entre a presença de ptose e sexo, assim como tipo de ptose e sexo. Houve diferença significativa entre pálpebras com ptose e sem ptose para DMR. A DMR não apresentou diferença significativa nas ptoses congênita ou adquirida. No que tange a DMSP e DMSC, a ptose adquirida possui valores superiores aos obtidos para portadores de ptose congênita. CONCLUSÃO: A avaliação do posicionamento palpebral confirmou que a DMR é menor nos portadores de ptose palpebral e que as ptoses congênitas e adquiridas possuem DMR semelhantes. A DMSC e a DMSP apresentam valores superiores em portadores de ptose adquirida.

  3. ¿Lo oyes? Concepto, imagen y sonoridad en Árbol adentro de Octavio Paz

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    Benjamín Valdivia

    2014-07-01

    Full Text Available Entre las grandes aportaciones intelectuales y creativas que ha hecho Octavio Paz a la poesía universal es relevante la fusión de una diversidad de tradiciones y técnicas en poemas de composición unitaria que se oponen a muchos autores de las vanguardias artísticas, a quienes, sin embargo, aprovecha adecuadamente. En ese sentido, el libro Árbol adentro es una especie de síntesis de síntesis, tanto por su lugar en el conjunto de la obra del poeta como por la intención que demuestra. El propósito del presente texto es considerar algunos aspectos de cómo se forma en Octavio Paz la unidad del poema a partir del entrelazamiento de concepto, imagen y sonoridad. Among the great intellectual and artistic contributions made by Octavio Paz to universal poetry is relevant the mixing of a variety of traditions and techniques in poems that were composed each one as a consistent unit, in a style opposed to that of many avant-garde authors, but suitably used in some extent by Paz himself. In this direction, the book Árbol adentro is a kind of “synthesis of synthesis”, both for its place in the whole of the poet’s work and for its visible intention. The purpose of this paper is to consider some aspects on how Octavio Paz builds the poem as a unit from a strong entanglement of concept, image and sound.

  4. Fotojornalismo e imagens locais: dois pontos de vista, duas profissões?

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    Daniel Thierry

    2011-06-01

    Full Text Available A prática clássica do fotojornalismo - profundamente enraizada no “credo” constituído a partir de Lewis Hine (1874-1940 – tem estabelecido, década após década, uma práxis e uma doxa quase não afetadas pelas transformações das formas do jornalismo. Desde a busca pela “boa imagem” - que seria percebida em sua transparência, em um esforço de refutar os traços enunciativos, numa perspectiva de objetividade máxima -, até a fotografia mais sedutora disponível em um hipermercado de ilustrações, a oferta de imagens parece bem delimitada.  Entretanto, longe da grande reportagem e da prática da excelência fotográfica recompensada por inúmeros prêmios internacionais e aparições nos espaços artístico-mediáticos, a fotografia da imprensa local permanece em segundo plano. Como oferecer uma representação de si mesmo que possa ser compartilhada no espaço local? Essa é a primeira pergunta que se faz aos editores da imprensa diária e semanal local. A partir de exemplos das práticas profissionais nesse domínio, o artigo propõe uma abordagem das filiações dessas mesmas práticas e uma análise com base na originalidade do status profissional dos autores das fotografias locais.

  5. La imagen numismática de Jano = Numismatic image of Janus

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    María Teresa Pradas Blasco

    2014-12-01

    Full Text Available El análisis iconográfico de la muestra numismática permite distinguir dos periodos distintos, en extensión y contenido: entre el 225 a. C. y el 31 a. C. aparece, se repite y, finalmente, se contamina el tipo «cabeza de Jano», y entre el 119 d. C. y el 260 d. C. se recupera al dios mediante el tipo «cuerpo de Jano». Al contrastar este resultado, aunque las fuentes literarias no coinciden con exactitud en la descripción sin embargo muestran concomitancias relevantes en cuanto a la cronología y a la interpretación. En la República, la imagen reiterada y simple se vincula con el poder militar de Roma pero, insólitamente, el rescate antonino marca el uso y el cambio de significado ya que Jano se integra en un programa que requiere del dios su competencia temporal.Iconographic analysis of the numismatic sample allows us to distinguish two different periods, both in length as well as in content: between 225 BC and 31 BC, the «Janus’ head» type appears, is repeated and, in the end, is contaminated; between 119 AD and 260 AD, the god´s image is recovered by means of the «Janus’ body» type. Contrasting this result, although the literary sources do not agree accurately on the description, they show important similarities in terms of chronology and interpretation. In the Republic, the repeated and simple image is linked to the military power of Rome but, unusually, the Antonine rescue changes the use and meaning because Janus is included in a program that needs the god’s functions concerning time.

  6. LA IMAGEN DEL PROFESOR DE EDUCACIÓN SECUNDARIA EN LA FORMACIÓN INICIAL

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    Zoe Martínez de la Hidalga

    2015-01-01

    Full Text Available Una de las metas educativas de la formación de profesorado es la construcción de la identidad profesional. Esta investigación tiene como objetivo conocer el concepto de la profesión de una muestra de estudiantes del Máster en Formación del Profesorado de Educación Secundaria. Para llevar a cabo el estudio, 35 alumnos y alumnas de dicho Máster han respondido un cuestionario de preguntas abiertas al finalizar el curso. Los resultados indican que los estudiantes son conscientes de muchas de las competencias que debe tener un profesor para desempeñar funciones, aunque no consideran algunas importantes como la evaluación de los aprendizajes, la gestión de la información o el análisis de la profesión en el contexto histórico-social. Entre las cualidades del buen profesor, los estudiantes mencionan el dominio de los conocimientos disciplinares y pedagógicos, la motivación, la actitud innovadora, las habilidades sociales, la paciencia y la responsabilidad. Las metáforas elegidas por los participantes, permiten constatar diferencias entre los estudiantes en cuanto al papel más o menos protagonista que conceden al profesor en el desarrollo y aprendizaje de sus alumnos. Los participantes reconocen que el Máster ha contribuido a cambiar su imagen del profesor y les ha llevado a valorar más la profesión.

  7. FOTOJORNALISMO E IMAGENS LOCAIS: dois pontos de vista, duas profissões?

    Directory of Open Access Journals (Sweden)

    Daniel Thierry

    2011-06-01

    Full Text Available A prática clássica do fotojornalismo - profundamente enraizada no “credo” constituído a partir de Lewis Hine (1874-1940 – tem estabelecido, década após década, uma práxis e uma doxa quase não afetadas pelas transformações das formas do jornalismo. Desde a busca pela “boa imagem” - que seria percebida em sua transparência, em um esforço de refutar os traços enunciativos, numa perspectiva de objetividade máxima -, até a fotografia mais sedutora disponível em um hipermercado de ilustrações, a oferta de imagens parece bem delimitada.  Entretanto, longe da grande reportagem e da prática da excelência fotográfica recompensada por inúmeros prêmios internacionais e aparições nos espaços artístico-mediáticos, a fotografia da imprensa local permanece em segundo plano. Como oferecer uma representação de si mesmo que possa ser compartilhada no espaço local? Essa é a primeira pergunta que se faz aos editores da imprensa diária e semanal local. A partir de exemplos das práticas profissionais nesse domínio, o artigo propõe uma abordagem das filiações dessas mesmas práticas e uma análise com base na originalidade do status profissional dos autores das fotografias locais.

  8. O Uso de Imagens Digitais na Classificação de Flores de Corte

    Directory of Open Access Journals (Sweden)

    GLÁUCIA MORAES DIAS

    2010-12-01

    Full Text Available O uso de técnicas de imagem em processo de produção agrícola está se tornando uma ferramenta muito promissora em apoio ao desenvolvimento da padronização, que levam em consideração a forma e o tamanho do produto. A análise dos elementos individuais no processo de classificação ou reconhecimento inicial da espécie, atende aos requisitos de tempo e precisão. O Brasil apresenta um enorme potencial para desenvolver a produção de flores e plantas ornamentais para o mercado interno, bem como para os mercados internacionais. Atualmente a produção de flores proporciona uma renda próxima a EUA $ 1,3 bilhões / ano, reunindo mais de 500 produtores concentrados em uma área de 8500 hectares, gerando uma receita de U $ 35 milhões no ano de 2007. As flores do Brasil e estratégia de exportação de plantas ornamentais tem o objetivo de orientar e dirigir as potencialidades específicas de produção de flores para aproveitar as oportunidades comerciais oferecidas pelo mercado internacional, enfatizando a tecnologia pós-colheita. É possível expressar um produto de qualidade por meio de imagens digitais. Programas de computador geram satisfatoriamente as análises necessárias para os padrões desejados, produzindo um processo rápido e eficiente. É esperado, que no futuro, o mercado brasileiro venha a adotar a classificação automática, reduzindo custos, melhorando a eficiência e a qualidade do produto oferecido ao consumidor.

  9. El poder organizador de la imagen // The organizing power of the image

    Directory of Open Access Journals (Sweden)

    Gloria Gómez

    2012-06-01

    Full Text Available Se trata de examinar la teoría del estadio del espejo de Lacan, en los dos tiempos de su construcción (1936 y 1949 con las referencias utilizadas para tal fin. Estas conciernen a fenómenos, problemas y nociones como: imagen (sensorial, corporal y especular, imago, imaginario, psicogénesis del cuerpo y del yo, unidad del yo, gestalt, prematuración y fetalización humana, que provienen del mismo psicoanálisis (Freud, Klein, Schilder, así como de campos del saber tales como la psicología infantil (Wallon y Balwin; la teoría de la Gestalt y su utilización por parte de la misma psicología infantil (Bühler, la fenomenología y la filosofía (Hussell, Kojève, Sartre, Merleau-Ponty, la etología (Köhler, Lorenz; la biología (Uexküll; la anatomía (Bolk. // The idea is to analyze the Lacan’s theory of the mirror stage, in the two periods of its construction (1936 and 1949 with the references used for reaching such purpose. These references correspond to phenomena, problems and notions like: image (sensorial, corporal and speculate, imago, imaginary, body and ego psychogenesis, ego unity, gestalt, human prematurity and fetal position, which come from psychoanalysis itself (Freud, Klein, Schilder, as well as fields of knowledge such as children psychology (Wallon y Balwin; Gestalt’s theory and its use by children psychology itself (Bühler; phenomenology and philosophy (Hussell, Kojeve, Sartre, Merleau- Ponty; ethology (Kohler, Lorenz; biology (Uexkull; anatomy (Bolk.

  10. ANALYSIS OF RELATIONSHIP BETWEEN URBAN HEAT ISLAND EFFECT AND LAND USE/COVER TYPE USING LANDSAT 7 ETM+ AND LANDSAT 8 OLI IMAGES

    Directory of Open Access Journals (Sweden)

    N. Aslan

    2016-06-01

    Full Text Available The main objectives of this study are (i to calculate Land Surface Temperature (LST from Landsat imageries, (ii to determine the UHI effects from Landsat 7 ETM+ (June 5, 2001 and Landsat 8 OLI (June 17, 2014 imageries, (iii to examine the relationship between LST and different Land Use/Land Cover (LU/LC types for the years 2001 and 2014. The study is implemented in the central districts of Antalya. Initially, the brightness temperatures are retrieved and the LST values are calculated from Landsat thermal images. Then, the LU/LC maps are created from Landsat pan-sharpened images using Random Forest (RF classifier. Normalized Difference Vegetation Index (NDVI image, ASTER Global Digital Elevation Model (GDEM and DMSP_OLS nighttime lights data are used as auxiliary data during the classification procedure. Finally, UHI effect is determined and the LST values are compared with LU/LC classes. The overall accuracies of RF classification results were computed higher than 88 % for both Landsat images. During 13-year time interval, it was observed that the urban and industrial areas were increased significantly. Maximum LST values were detected for dry agriculture, urban, and bareland classes, while minimum LST values were detected for vegetation and irrigated agriculture classes. The UHI effect was computed as 5.6 °C for 2001 and 6.8 °C for 2014. The validity of the study results were assessed using MODIS/Terra LST and Emissivity data and it was found that there are high correlation between Landsat LST and MODIS LST data (r2 = 0.7 and r2 = 0.9 for 2001 and 2014, respectively.

  11. Comparison of Sentinel-2A and Landsat-8 Nadir BRDF Adjusted Reflectance (NBAR) over Southern Africa

    Science.gov (United States)

    Li, J.; Roy, D. P.; Zhang, H.

    2016-12-01

    The Landsat satellites have been providing moderate resolution imagery of the Earth's surface for over 40 years with continuity provided by the Landsat 8 and planned Landsat 9 missions. The European Space Agency Sentinel-2 satellite was successfully launched into a polar sun-synchronous orbit in 2015 and carries the Multi Spectral Instrument (MSI) that has Landsat-like bands and acquisition coverage. These new sensors acquire images at view angles ± 7.5° (Landsat) and ± 10.3° (Sentinel-2) from nadir that result in small directional effects in the surface reflectance. When data from adjoining paths, or from long time series are used, a model of the surface anisotropy is required to adjust observations to a uniform nadir view (primarily for visual consistency, vegetation monitoring, or detection of subtle surface changes). Recently a generalized approach was published that provides consistent Landsat view angle corrections to provide nadir BRDF-adjusted reflectance (NBAR). Because the BRDF shapes of different terrestrial surfaces are sufficiently similar over the narrow 15° Landsat field of view, a fixed global set of MODIS BRDF spectral model parameters was shown to be adequate for Landsat NBAR derivation with little sensitivity to the land cover type, condition, or surface disturbance. This poster demonstrates the application of this methodology to Sentinel-2 data over a west-east transect across southern Africa. The reflectance differences between adjacent overlapping paths in the forward and backward scatter directions are quantified for both before and after BRDF correction. Sentinel-2 and Landsat-8 reflectance and NBAR inter-comparison results considering different stages of cloud and saturation filtering, and filtering to reduce surface state differences caused by acquisition time differences, demonstrate the utility of the approach. The relevance and limitations of the corrections for providing consistent moderate resolution reflectance are discussed.

  12. Vilèm Flusser: crítica estética e imagen tecno-visual

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    Victor Silva Echeto

    2013-06-01

    Full Text Available El giro estético de la ilustración se debe, fundamentalmente, a Kant y a Hegel. En ese contexto, el concepto de imagen visual emerge, atrapando al arte en las redes estéticas. La modernidad, en esa época, adquiere toda su madurez y habilita un giro, en la filosofía, occidental, que estetiza la razón. Radicalizado el giro, en el llamado postestructuralismo, es Vilém Flusser, quien, desde su nomadismo e indisciplinamiento, plantea una radical crítica al pensamiento hegeliano, desde “la imagen técnica” como “elogio de la superficialidad”, o, en nuestro parecer, “teoría de la pantalla”. Los intermedios y posteriores, planteamientos críticos en crisis, deconstructivos, fundamentalmente, en el caso de Derrida, desestabilizan y tensionan, el planteamiento estético, desde los márgenes (párergon y la interrogante por “la verdad” de lo visual. La postestética, tanto en Badiou como en Rancière, se pregunta en un caso (Badiou por lo inestético y, en el otro (Rancière, por el reparto de lo sensible. El presente texto, analiza, desde la crítica a la estética, tanto en Kant como en Hegel, el giro visual en Flusser, la deconstrucción y el giro de los llamados postalthusserianos (Badiou y Rancière, y la implicancia de la imagen técnica que, desde lo superficial y lo profundo, permiten delinear los trazos de una teoría de la pantalla.

  13. Diagrama e catástrofe: Deleuze e a produção de imagens pictóricas

    Directory of Open Access Journals (Sweden)

    Cíntia Vieira da Silva

    2015-01-01

    Full Text Available O artigo é uma leitura das duas primeiras aulas proferidas por Deleuze em torno da pintura no início de 1981. Seu intuito é expor a articulação entre os conceitos de catástrofe (ou caos, conforme o vocabulário escolhido seja o das aulas ou o de O que é a filosofia? e de diagrama. Tal par conceitual encontra-se no cerne da produção de fatos pictóricos ou novas imagens com força suficiente para se contrapor ao conjunto de imagens-clichê. Diagrama designa o procedimento por meio do qual o pintor obtém algum ordenamento do caos resultante da dissolução das imagens já vistas e tornadas clichê, permitindo, ainda assim, a continuidade da ação das forças de deformação advindas do caos. Outro tema visitado pelo artigo é a primazia conferida por Deleuze à relação da pintura com o tempo, em detrimento daquela entretida com o espaço. Interessante notar que não só a definição desses conceitos, como também o vocabulário empregado para nomeá-los atesta que foram criados em meio ao estudo das obras pictóricas e textuais dos pintores, como que em parceria com estes.

  14. Processamento de imagens de veículos aéreos não tripulados para estudos da vegetação

    OpenAIRE

    Luna Avilés, Inti Ernesto

    2012-01-01

    O objetivo principal desta tese de mestrado foi avaliar as aplicações ambientais e agrícolas de imagens obtidas com veículos aéreos não-tripulados (VANT) para estudar a vegetação e para avaliar o processamento de imagens envolvido, a fim de obter informação útel e compatível com outro tipo de geo-dados. Imagens dos veículos aéreos não tripulados foram processadas em três diferentes casos de estudo individualmente descritos e analisados com uma estreita relação entre si. (1) ...

  15. Canarias triunfante: la plasmación de la imagen a través del mito

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    Jonás Armas Núñez

    2013-01-01

    Full Text Available La obtención de la capitalidad de la Provincia de Canarias por parte de Santa Cruz de Tenerife en el siglo XIX llevó implícita la necesidad de mostrar en la urbe las ideas de poder y progreso. La erección de nuevos edificios representativos y el empuje de la nueva y pujante clase social, la burguesía, crearon en Santa Cruz de Tenerife suntuosos escaparates de la imagen del poder de la capital, entre los que destaca el palacio de la Capitanía General de Canarias, y en especial su singular Salón del Trono.

  16. Composición e invarianza factorial del cuestionario IMAGEN en adolescentes mexicanos y españoles

    OpenAIRE

    Blanco, J.R.; Solano, N.; Benavides, E.V.; Ornelas, M.

    2017-01-01

    El presente estudio analiza las propiedades psicométricas propuestos por Solano-Pinto y Cano-Vindel (2010) para el cuestionario IMAGEN. La muestra total fue de 533 participantes 257 mexicanos y 276 españoles, con una edad media de 13.15 años (DE=1.10). La estructura factorial del cuestionario se analizó a través de análisis factoriales exploratorios y confirmatorios. Los análisis, muestran que una estructura de cinco factores es viable y adecuada. La estructura de cinco factores (perceptivo, ...

  17. A OBRA ALÉM DA OBRA: IMAGENS E REPRESENTAÇÕES MÍTICAS GUARANI MBYA

    Directory of Open Access Journals (Sweden)

    Cássia A. Guimarães

    2015-12-01

    Full Text Available As narrativas e imagens retratadas no livro didático criado pelo CECI (Centro de Educação e Cultura Indígena Guarani Mbya - PMSP Nhandereko Nhemombe’u Tenonderã (Histórias para Contar e Sonhar (2007, expressam um corpus documental sobre a cultura desse grupo étnico. Através deste, compreende-se o mito como uma linguagem fundacional e de recriação de saberes imemoriais. Ordena-se um imaginário social que progride historicamente por uma linguagem que recria e fortalece a identidade e história desse povo.

  18. La relación entre cortesía e imagen social en entrevistas radiofónicas

    OpenAIRE

    Kahrs, Cathrine

    2010-01-01

    Esta tesina trata la relación entre el estilo de cortesía empleado por el periodista y la imagen del entrevistado en entrevistas radiofónicas. Se estudia un corpus compuesto por transcripciones hechas por nosotros de los primeros cuatro minutos de 24 entrevistas radiofónicas. Todas las entrevistas están hechas por la periodista Gemma Nierga en el programa La Ventana de la emisora española Cadena SER en el año 2008. Las entrevistas se dividen en tres grupos según el rol de los entrevistados: c...

  19. Applications of the Preclinical Molecular Image in Biomedicine; Aplicaciones de la imagen Molecular Preclínica en Biomedicina

    Energy Technology Data Exchange (ETDEWEB)

    Delgado, M.; Bascuñana, P.; Fernández de la Rosa, R.; De Cristobal, J.; García-García, L.; Pozo, M. A.

    2014-07-01

    Molecular imaging is a broad platform, which provides valuable information about physiological and pathophysiological changes in living organisms by non-invasive methods. Depending on the used technique: anatomical, functional metabolic or molecular data could be assessed. Positron Emission Tomography (PET) provides with functional and molecular data, and combined with Computerized Tomography (CT) and Magnetic Resonance (MRI) with the multimodality equipment, it can be exponentially improved. Metabolic pathways and changes on the molecular and cellular level are target in molecular imaging cancer research. Tumour microenvironment, stroma and new vessels can be assessed by PET imaging. Additionally the visualization of functions and monitoring data of provided therapies could be obtained. The aim of the current review is to summarize principles and novel findings in molecular imaging specifically in PET and its application in preclinical cancer research. The theoretical background of techniques and main applications will be highlighted [Spanish] La imagen molecular aporta información muy valiosa, mediante métodos no invasivos, acerca de la fisiología de organismos vivos y sus cambios debidos a patologías. Dependiendo de la técnica utilizada se pueden obtener datos anatómicos, funcionales, metabólicos o moleculares. La Tomografía por Emisión de Positrones (PET) aporta datos metabólicos y moleculares con una alta sensibilidad, y en asociación con la Tomografía Computarizada (TC) o con Resonancia Magnética (RM), con la aparición de los nuevos equipos multimodalidad, las posibilidades de diagnóstico se incrementan exponencialmente. La imagen molecular en investigación oncológica presenta como objetivos principales identificar las diferentes vías metabólicas tumorales y sus cambios a nivel molecular y celular, el comportamiento del microentorno tumoral, aparición de nuevos vasos, estroma, etc. Además, es posible el análisis y cuantificación del

  20. LA GESTIÓN DE LA IMAGEN SUBJETIVA Y OBJETIVA DE LA EMPRESA EN LOS NUEVOS CANALES COMERCIALES

    Directory of Open Access Journals (Sweden)

    David López Jiménez

    2012-08-01

    Full Text Available La reputación corporativa es un valor difícil de crear, pero muy fácil de perder. Tal aspecto se proyecta tanto en el mundo tradicional como en el escenario virtual. En la formación de la imagen empresarial influyen numerosos factores, si bien, en la actualidad, los instrumentos sociales presentes en Internet amplifican los efectos, positivos o negativos, respecto a la misma. Una vez cuantificada, podrá monitorizarse para realizar las medidas pertinentes.

  1. Significado patológico de la imagen ultrasónica en pequeños animales

    OpenAIRE

    Moreno Boiso, Antonio; Hervás Rodríguez, José; Chacón, F.

    2011-01-01

    La ecografía es una técnica de diagnóstico por imagen segura, no invasiva y que no requiere una preparación excesiva del animal. Se utiliza para estudiar tejidos blandos, permitiendo la valoración del tamaño, forma, situación y estructura de los mismos. La ecografía o ultrasonografía se basa en los ultrasonidos generados en un dispositivo llamado transductor, compuesto por cristales piezoeléctricos. La Histopatología constituye un medio diagnóstico especializado, complementario de otras técni...

  2. La imagen periodística no fotográfica (II. El dibujo: definiciones y orígenes

    Directory of Open Access Journals (Sweden)

    Dr. Carlos Abreu

    2000-01-01

    Full Text Available En este segundo trabajo de la serie sobre la imagen periodística no fotográfica, el doctor Abreu nos ofrece una reseña crítica de las definiciones acerca del dibujo para luego hacer una cronología acerca del mismo, desde sus orígenes hasta su incursión en el periodismo impreso. De esta manera, el autor nos ilustra sobre su uso, bien como adorno o con fines representativos, propio de sus primeras manifestaciones, para posteriormente hacer referencia al dibujo en medios impresos, desde las primeras hojas sueltas hasta las publicaciones periodísticas pioneras.

  3. Relleno de huecos en mallas 3D completas mediante algoritmos de restauración de imagen

    Directory of Open Access Journals (Sweden)

    Emiliano Pérez Hernàndez

    2012-10-01

    Full Text Available Resumen: En este artículo se propone un método para rellenar huecos en objetos 3D. La idea principal es la de utilizar un algoritmo de restauración de imágenes para reconstruir las partes que se han de completar. Para ello es necesario hacer una transformación de los datos de la superficie 3D en datos de imagen 2D. Por tanto, el algoritmo propuesto parte de una etapa inicial de identificación de huecos. A continuación se hace la selección, para cada hueco, de una porción de malla representativa. Seguidamente se calcula el punto de vista o plano de proyección adecuado para obtener una imagen de rango de esa porción de malla. A la imagen de rango obtenida se le aplica el algoritmo de restauración de imagen. Finalmente, se aplica una transformación inversa 2D a 3D y se integra el éresultado con la malla inicial. Se trata de un algoritmo robusto, válido para diversos tipos de huecos y diferentes tamaños de los mismos. Abstract: In this work a method for filling holes in 3D meshes based on a 2D image restoration algorithm is expounded. To do that, data must be converted to a suitable input format, a 3D to 2D transformation is executed by projecting the 3D surface onto a grid. Therefore, the proposed algorithm starts by a first stage of holes identification. Then, a meaningful mesh portiéon is choosen for each hole. Afterward, the suitable plane of projection must be computed to get the range image of the mesh portion. Later, it is applied the restauration image algorithm to the range image. Finally, an inverse transformation 2D to 3D is performed and the new produced data are integrated with the initial mesh. The result is a robust algorithm which works correctly with several kind of holes and for di_erent sizes of them. Palabras clave: visión por computador, gráficos por computador, imágenes digitales, imágenes de rango, restauración de imágenes, Keywords: computer vision, computer graphics, digital images, range images

  4. Analysis and correction of Landsat 4 and 5 Thematic Mapper Sensor Data

    Science.gov (United States)

    Bernstein, R.; Hanson, W. A.

    1985-01-01

    Procedures for the correction and registration and registration of Landsat TM image data are examined. The registration of Landsat-4 TM images of San Francisco to Landsat-5 TM images of the San Francisco using the interactive geometric correction program and the cross-correlation technique is described. The geometric correction program and cross-correlation results are presented. The corrections of the TM data to a map reference and to a cartographic database are discussed; geometric and cartographic analyses are applied to the registration results.

  5. A Hybrid Color Mapping Approach to Fusing MODIS and Landsat Images for Forward Prediction

    OpenAIRE

    Chiman Kwan; Bence Budavari; Feng Gao; Xiaolin Zhu

    2018-01-01

    We present a new, simple, and efficient approach to fusing MODIS and Landsat images. It is well known that MODIS images have high temporal resolution and low spatial resolution, whereas Landsat images are just the opposite. Similar to earlier approaches, our goal is to fuse MODIS and Landsat images to yield high spatial and high temporal resolution images. Our approach consists of two steps. First, a mapping is established between two MODIS images, where one is at an earlier time, t1, and the...

  6. Use of LANDSAT data to define soil boundaries in Carroll County, Missouri

    Science.gov (United States)

    Davidson, S. E.

    1981-01-01

    Bands 4, 5 and 7 false color composite photographs were prepared using data from LANDSAT scenes acquired during April 1977 and April 1981 on computer compatible tapes, and these color composites were compared with band 7 black and white photographs prepared for the entire county. Delineations of soil boundaries at the soil association level were achieved using LANDSAT spectral reflectance data and slope maps for a portion of Carroll County, Missouri. Forty two spectral reflectance classes from April 1977 LANDSAT data were overlaid on digitized slope maps of nine USGS 7.5 minute series topographic quadrangle slope maps to achieve boundary delineations of the soil associations.

  7. Validation of the USGS Landsat Burned Area Essential Climate Variable (BAECV) across the conterminous United States

    Science.gov (United States)

    Vanderhoof, Melanie; Fairaux, Nicole; Beal, Yen-Ju G.; Hawbaker, Todd J.

    2017-01-01

    The Landsat Burned Area Essential Climate Variable (BAECV), developed by the U.S. Geological Survey (USGS), capitalizes on the long temporal availability of Landsat imagery to identify burned areas across the conterminous United States (CONUS) (1984–2015). Adequate validation of such products is critical for their proper usage and interpretation. Validation of coarse-resolution products often relies on independent data derived from moderate-resolution sensors (e.g., Landsat). Validation of Landsat products, in turn, is challenging because there is no corresponding source of high-resolution, multispectral imagery that has been systematically collected in space and time over the entire temporal extent of the Landsat archive. Because of this, comparison between high-resolution images and Landsat science products can help increase user's confidence in the Landsat science products, but may not, alone, be adequate. In this paper, we demonstrate an approach to systematically validate the Landsat-derived BAECV product. Burned area extent was mapped for Landsat image pairs using a manually trained semi-automated algorithm that was manually edited across 28 path/rows and five different years (1988, 1993, 1998, 2003, 2008). Three datasets were independently developed by three analysts and the datasets were integrated on a pixel by pixel basis in which at least one to all three analysts were required to agree a pixel was burned. We found that errors within our Landsat reference dataset could be minimized by using the rendition of the dataset in which pixels were mapped as burned if at least two of the three analysts agreed. BAECV errors of omission and commission for the detection of burned pixels averaged 42% and 33%, respectively for CONUS across all five validation years. Errors of omission and commission were lowest across the western CONUS, for example in the shrub and scrublands of the Arid West (31% and 24%, respectively), and highest in the grasslands and

  8. Analysis of conifer forest regeneration using Landsat Thematic Mapper data

    Science.gov (United States)

    Fiorella, Maria; Ripple, William J.

    1995-01-01

    Landsat Thematic Mapper (TM) data were used to evaluate young conifer stands in the western Cascade Mountains of Oregon. Regression and correlation analyses were used to describe the relationships between TM band values and age of young Douglas-fir stands (2 to 35 years old). Spectral data from well regenerated Douglas-fir stands were compared to those of poorly regenerated conifer stands. TM bands 1, 2, 3, 5, 6, and 7 were inversely correlated with the age (r greater than or equal to -0.80) of well regenerated Douglas-fir stands. Overall, the 'structural index' (TM 4/5 ratio) had the highest correlation to age of Douglas-fir stands (r = 0.96). Poorly regenerated stands were spectrally distinct from well regenerated Douglas-fir stands after the stands reached an age of approximately 15 years.

  9. Budapest, Hungary, Perspective View, SRTM Elevation Model with Landsat Overlay

    Science.gov (United States)

    2004-01-01

    After draining the northern flank of the Alps Mountains in Germany and Austria, the Danube River flows east as it enters this west-looking scene (upper right) and forms the border between Slovakia and Hungary. The river then leaves the border as it enters Hungary and transects the Transdanubian Mountains, which trend southwest to northeast. Upon exiting the mountains, the river turns southward, flowing past Budapest (purplish blue area) and along the western margin of the Great Hungarian Plain.South and west of the Danube, the Transdanubian Mountains have at most only about 400 meters (about 1300 feet) of relief but they exhibit varied landforms, which include volcanic, tectonic, fluvial (river), and eolian (wind) features. A thick deposit of loess (dust deposits likely blown from ancient glacial outwash) covers much of this area, and winds from the northwest, funneled between the Alps and the Carpathian Mountains, are apparently responsible for a radial pattern of erosional streaks across the entire region.This image was generated from a Landsat satellite image draped over an elevation model produced by the Shuttle Radar Topography Mission (SRTM). The view uses a 3-times vertical exaggeration to enhance topographic expression. The false colors of the scene result from displaying Landsat bands 1, 4, and 7 in blue, green, and red, respectively. Band 1 is visible blue light, but bands 4 and 7 are reflected infrared light. This band combination maximizes color contrasts between the major land cover types, namely vegetation (green), bare ground (red), and water (blue). Shading of the elevation model was used to further highlight the topographic features.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space

  10. Landsat Data Continuity Mission (LDCM) - Optimizing X-Band Usage

    Science.gov (United States)

    Garon, H. M.; Gal-Edd, J. S.; Dearth, K. W.; Sank, V. I.

    2010-01-01

    The NASA version of the low-density parity check (LDPC) 7/8-rate code, shortened to the dimensions of (8160, 7136), has been implemented as the forward error correction (FEC) schema for the Landsat Data Continuity Mission (LDCM). This is the first flight application of this code. In order to place a 440 Msps link within the 375 MHz wide X band we found it necessary to heavily bandpass filter the satellite transmitter output . Despite the significant amplitude and phase distortions that accompanied the spectral truncation, the mission required BER is maintained at LDPC code and the amplitude and phase compensation provided in the receiver. Similar results were obtained with receivers from several vendors.

  11. Perspective view, Landsat overlay San Andreas Fault, Palmdale, California

    Science.gov (United States)

    2000-01-01

    The prominent linear feature straight down the center of this perspective view is the San Andreas Fault. This segment of the fault lies near the city of Palmdale, California (the flat area in the right half of the image) about 60 kilometers (37 miles) north of Los Angeles. The fault is the active tectonic boundary between the North American plate on the right, and the Pacific plate on the left. Relative to each other, the Pacific plate is moving away from the viewer and the North American plate is moving toward the viewer along what geologists call a right lateral strike-slip fault. Two large mountain ranges are visible, the San Gabriel Mountains on the left and the Tehachapi Mountains in the upper right. The Lake Palmdale Reservoir, approximately 1.5 kilometers (0.9 miles) across, sits in the topographic depression created by past movement along the fault. Highway 14 is the prominent linear feature starting at the lower left edge of the image and continuing along the far side of the reservoir. The patterns of residential and agricultural development around Palmdale are seen in the Landsat imagery in the right half of the image. SRTM topographic data will be used by geologists studying fault dynamics and landforms resulting from active tectonics.This type of display adds the important dimension of elevation to the study of land use and environmental processes as observed in satellite images. The perspective view was created by draping a Landsat satellite image over an SRTM elevation model. Topography is exaggerated 1.5 times vertically. The Landsat image was provided by the United States Geological Survey's Earth Resources Observations Systems (EROS) Data Center, Sioux Falls, South Dakota.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11,2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR

  12. A fully redundant power hinge for LANDSAT-D appendages

    Science.gov (United States)

    Mamrol, F. E.; Matteo, D. N.

    1981-01-01

    The configuration and testing of a power driven hinge for deployment of the solar array and antenna boom for the LANDSAT-D spacecraft is discussed. The hinge is fully mechanically and electrically redundant and, thereby, can sustain a single point failure of any one motor (or its power supply), speed reducer, or bearing set without loss of its ability to function. This design utilizes the capability of the stepper motor drive to remove the flexibility of the drive train from the joint stiffness equation when the hinge is loaded against its stop. This feature precludes gapping of the joint under spacecraft maneuver loads even in the absence of a latching feature. Thus, retraction is easily accomplished by motor reversal without the need for a solenoid function to remove the latch.

  13. Impacto de los programas de aportes y donaciones de almacenes de cadena de Cartagena sobre la imagen y reputación

    Directory of Open Access Journals (Sweden)

    Francisco José Arias-Aragonés

    2017-02-01

    Full Text Available El presente artículo es resultado de un estudio realizado a los almacenes de cadena de la ciudad de Cartagena para medir el impacto de los programas de aportes y donaciones sobre la imagen corporativa y reputación. Se hace primero un seguimiento de la discusión teórica reciente alrededor de los conceptos de RSE, aportes y donaciones, imagen corporativa y reputación. Luego se aplica un método cuantitativo y se formulan cuatro hipótesis para medir la incidencia de las variables acción social y relaciones con la comunidad sobre la imagen corporativa y reputación. La discusión teórica encontró que la RSE debe entenderse como una filosofía de gestión empresarial comprometida con el mejoramiento de las condiciones de vida de la sociedad en general. Adicionalmente, las pruebas de hipótesis confirmaron las diferencias conceptuales entre la imagen corporativa y reputación por encontrarse una relación directa y positiva entre las variables acción social y relaciones con la comunidad sobre la imagen corporativa y una relación no directa entre las variables acción social y reputación. Esto muestra que los programas de aportes y donaciones pueden contribuir a mejorar la imagen corporativa, mientras que la reputación exige un esfuerzo más integral y de acciones a lo largo del tiempo.

  14. Conductas alimentarias de riesgo y su relación con la imagen corporal en estudiantes de enfermería

    Directory of Open Access Journals (Sweden)

    María del Pilar Ureña Molina

    2015-06-01

    Full Text Available Objetivo: determinar la relación entre las conductas alimentarias de riesgo y la imagen corporal en los estudiantes de enfermería durante el primer semestre del año 2015. Materiales y Métodos: estudio de tipo cuantitativo, correlacional. Se utilizaron como instrumentos, el Test de Imagen Corporal - Cuestionario Body Shape Questionnaire y el Test De Actitudes Alimentarias - 26. La muestra estuvo conformada por 181 estudiantes. Resultados: la mayor proporción de estudiantes pertenecen al género femenino, las edades fluctuaron entre los 16 a 28 años, predominando el estado civil soltero, pertenecientes a un estrato socioeconómico bajo (1 -2 y conviven con sus padres. El 63% obtuvo un estado nutricional normal, la mayor parte de ellos no presentaron conductas alimentarias de Riesgo (94% y se encontraban satisfechos con su imagen corporal (91%. Se estableció una relación estadísticamente significativa entre las conductas alimentarias de riesgo y la imagen corporal. Conclusiones: los estudiantes de enfermería, en su mayoría, no presentaron conductas alimentarias de riesgo, es decir, no realizan prácticas extremas para el control de su peso corporal y los que la presentaron, pueden tener afectaciones en su desempeño académico, las relaciones interpersonales y la calidad de vida. Así mismo, la mayoría de ellos mostraron una apreciación satisfactoria de su imagen corporal y un pequeño porcentaje, estuvo insatisfecho, reflejando diversos desórdenes de tipo conductual, cognitivo y emocional. Se determinó que la integridad de la imagen corporal disminuye la presencia de conductas alimentarias de riesgo.

  15. United States Forest Disturbance Trends Observed Using Landsat Time Series

    Science.gov (United States)

    Masek, Jeffrey G.; Goward, Samuel N.; Kennedy, Robert E.; Cohen, Warren B.; Moisen, Gretchen G.; Schleeweis, Karen; Huang, Chengquan

    2013-01-01

    Disturbance events strongly affect the composition, structure, and function of forest ecosystems; however, existing U.S. land management inventories were not designed to monitor disturbance. To begin addressing this gap, the North American Forest Dynamics (NAFD) project has examined a geographic sample of 50 Landsat satellite image time series to assess trends in forest disturbance across the conterminous United States for 1985-2005. The geographic sample design used a probability-based scheme to encompass major forest types and maximize geographic dispersion. For each sample location disturbance was identified in the Landsat series using the Vegetation Change Tracker (VCT) algorithm. The NAFD analysis indicates that, on average, 2.77 Mha/yr of forests were disturbed annually, representing 1.09%/yr of US forestland. These satellite-based national disturbance rates estimates tend to be lower than those derived from land management inventories, reflecting both methodological and definitional differences. In particular the VCT approach used with a biennial time step has limited sensitivity to low-intensity disturbances. Unlike prior satellite studies, our biennial forest disturbance rates vary by nearly a factor of two between high and low years. High western US disturbance rates were associated with active fire years and insect activity, while variability in the east is more strongly related to harvest rates in managed forests. We note that generating a geographic sample based on representing forest type and variability may be problematic since the spatial pattern of disturbance does not necessarily correlate with forest type. We also find that the prevalence of diffuse, non-stand clearing disturbance in US forests makes the application of a biennial geographic sample problematic. Future satellite-based studies of disturbance at regional and national scales should focus on wall-to-wall analyses with annual time step for improved accuracy.

  16. Un enfoque de gestión de la imagen de marca de los destinos turísticos basado en las características del turista.

    OpenAIRE

    San Martín Gutiérrez, Héctor; Rodríguez del Bosque Rodríguez, Ignacio Alfredo

    2010-01-01

    RESUMEN. La generación de asociaciones de marca favorables, fuertes y únicas en la mente de los turistas, más conocido como branding, resulta básica en la consecución de una buena imagen y posicionamiento de los destinos turísticos en sus mercados objetivo. En este contexto, en la investigación de turismo se ha puesto de manifiesto recientemente la necesidad de estudiar con mayor profundidad de lo hecho hasta el momento en la literatura la formación de la imagen de marca de los de...

  17. La imagen de los inmigrantes en la ficción televisiva de prime time. Análisis y recomendaciones para los profesionales.

    OpenAIRE

    Marcos Ramos, María

    2014-01-01

    [ES] La presente tesis doctoral analiza la imagen de la inmigración en la ficción televisiva de prime time. Gracias al análisis de casi 3.000 personajes de ficción se ha podido realizar una radiografía de la población inmigrante en los relatos ficcionales. Así, la tesis que aquí se presenta tiene como principal objetivo analizar la imagen de los inmigrantes en la ficción televisiva. Se pretende comprobar si la aparición del fenómeno inmigratorio se caracteriza, como concluyeron el resto de...

  18. Restauración de la imagen de Santa María. Portada norte de la Concatedral de Castellón

    Directory of Open Access Journals (Sweden)

    José Luis Roig Salom

    1998-04-01

    Full Text Available La trágica demolición de la Iglesia de Santa María de Castellón trajo consigo la destrucción  de la imagen de la Virgen con el Niño que presidía el tímpano de la portada norte. Varios fragmentos recogidos enton­ces por un transeúnte han esperado más de cin­cuenta años para ver la luz, y constituirse en la base de un interesante ejercicio de anastilosis que ha devuelto al nuevo templo la imagen recuperada.

  19. Guerra de imagens e imagens da guerra: estupro e sacrifício na Guerra do Iraque War of images and images of war: rape and sacrifice in the Iraq War

    Directory of Open Access Journals (Sweden)

    Carmen Rial

    2007-04-01

    Full Text Available O artigo aborda um dos grandes silêncios da mídia global: o caso dos estupros de mulheres muçulmanas por soldados e mercenários norte-americanos no Iraque, através da análise das imagens dessas violências. O mediascape contemporâneo é um dos mais prolixos. No entanto, silêncios permanecem como estes e outros estupros de guerra. Com uma abordagem antropológica do significado da guerra, o artigo enfoca também a participação e as imagens das mulheres neste espaço masculino que é a guerra.This article addresses one of the great issues about which global media remains silent: the rape of Muslim women by U.S. soldiers in Iraq. Contemporary mediascape is prolix. But some silences remain, such as the issue of rape during war. With an anthropological approach to the meaning of war and through the analysis of images, the article focuses on the participation of women in this male space.

  20. SEDIMENT ANALYSIS NETWORK FOR DECISION SUPPORT (SANDS) LANDSAT GEOLOGICAL SURVEY OF AL (GSA) ANALYSIS V1

    Data.gov (United States)

    National Aeronautics and Space Administration — The Sediment Analysis Network for Decision Support (SANDS) Landsat Geological Survey of AL (GSA) Analysis dataset analyzed changes in the coastal shoreline and...

  1. Landsat 8 Operational Land Imager (OLI)_Thermal Infared Sensor (TIRS) V1

    Data.gov (United States)

    National Aeronautics and Space Administration — Abstract:The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are instruments onboard the Landsat 8 satellite, which was launched in February of...

  2. A study of atmospheric diffusion from the LANDSAT imagery. [pollution transport over the ocean

    Science.gov (United States)

    Dejesusparada, N. (Principal Investigator); Viswanadham, Y.; Torsani, J. A.

    1981-01-01

    LANDSAT multispectral scanner data of the smoke plumes which originated in eastern Cabo Frio, Brazil and crossed over into the Atlantic Ocean, are analyzed to illustrate how high resolution LANDSAT imagery can aid meteorologists in evaluating specific air pollution events. The eleven LANDSAT images selected are for different months and years. The results show that diffusion is governed primarily by water and air temperature differences. With colder water, low level air is very stable and the vertical diffusion is minimal; but water warmer than the air induces vigorous diffusion. The applicability of three empirical methods for determining the horizontal eddy diffusivity coefficient in the Gaussian plume formula was evaluated with the estimated standard deviation of the crosswind distribution of material in the plume from the LANDSAT imagery. The vertical diffusion coefficient in stable conditions is estimated using Weinstock's formulation. These results form a data base for use in the development and validation of meso scale atmospheric diffusion models.

  3. LBA-ECO LC-24 Landsat ETM+ Forest Cover Classification, Uruara, Para, Brazil: 1999

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set contains a 1999 Landsat ETM+ mosaic image land of cover classification showing forested and deforestation areas in Uruara, Para, Brazil. This image may...

  4. LBA-ECO LC-24 Landsat ETM+ Forest Cover Classification, Uruara, Para, Brazil: 1999

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: This data set contains a 1999 Landsat ETM+ mosaic image land of cover classification showing forested and deforestation areas in Uruara, Para, Brazil. This...

  5. The new Landsat 8 potential for remote sensing of colored dissolved organic matter (CDOM)

    Science.gov (United States)

    Slonecker, Terry; Jones, Daniel K.; Pellerin, Brian A.

    2016-01-01

    Due to a combination of factors, such as a new coastal/aerosol band and improved radiometric sensitivity of the Operational Land Imager aboard Landsat 8, the atmospherically-corrected Surface Reflectance product for Landsat data, and the growing availability of corrected fDOM data from U.S. Geological Survey gaging stations, moderate-resolution remote sensing of fDOM may now be achievable. This paper explores the background of previous efforts and shows preliminary examples of the remote sensing and data relationships between corrected fDOM and Landsat 8 reflectance values. Although preliminary results before and after Hurricane Sandy are encouraging, more research is needed to explore the full potential of Landsat 8 to continuously map fDOM in a number of water profiles.

  6. LBA-ECO CD-34 Landsat Fractional Land Cover Analysis, Manaus, Brazil: 2004-2005

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set provides the results of fractional land cover analysis for nonphotosynthetic vegetation (NPV) from two Landsat images of Manaus, Brazil, for October...

  7. Fire monitoring capability of the joint Landsat and Sentinel 2 constellation

    Science.gov (United States)

    Murphy, S.; Wright, R.

    2017-12-01

    Fires are a global hazard. Landsat and Sentinel 2 can monitor the Earth's surface every 2 - 4 days. This provides an important opportunity to complement the operational (lower resolution) fire monitoring systems. Landsat-class sensors can detect small fires that would be missed by MODIS-classed sensors. All large fires start out as small fires. We analyze fire patterns in California from 1984 to 2017 and compare the performance of Landsat-type and MODIS-type sensors. Had an operational Landsat-Sentinel 2 fire detection system been in place at the time of the Soberanes fire last year (i.e. August 2016), the cost of suppressing of this fire event (US $236 million) could potentially have been reduced by an order of magnitude.

  8. The new Landsat 8 potential for remote sensing of colored dissolved organic matter (CDOM).

    Science.gov (United States)

    Slonecker, E Terrence; Jones, Daniel K; Pellerin, Brian A

    2016-06-30

    Due to a combination of factors, such as a new coastal/aerosol band and improved radiometric sensitivity of the Operational Land Imager aboard Landsat 8, the atmospherically-corrected Surface Reflectance product for Landsat data, and the growing availability of corrected fDOM data from U.S. Geological Survey gaging stations, moderate-resolution remote sensing of fDOM may now be achievable. This paper explores the background of previous efforts and shows preliminary examples of the remote sensing and data relationships between corrected fDOM and Landsat 8 reflectance values. Although preliminary results before and after Hurricane Sandy are encouraging, more research is needed to explore the full potential of Landsat 8 to continuously map fDOM in a number of water profiles. Published by Elsevier Ltd.

  9. Distribution of Snow and Maximum Snow Water Equivalent Obtained by LANDSAT Data and Degree Day Method

    Science.gov (United States)

    Takeda, K.; Ochiai, H.; Takeuchi, S.

    1985-01-01

    Maximum snow water equivalence and snowcover distribution are estimated using several LANDSAT data taken in snowmelting season over a four year period. The test site is Okutadami-gawa Basin located in the central position of Tohoku-Kanto-Chubu District. The year to year normalization for snowmelt volume computation on the snow line is conducted by year to year correction of degree days using the snowcover percentage within the test basin obtained from LANDSAT data. The maximum snow water equivalent map in the test basin is generated based on the normalized snowmelt volume on the snow line extracted from four LANDSAT data taken in a different year. The snowcover distribution on an arbitrary day in snowmelting of 1982 is estimated from the maximum snow water equivalent map. The estimated snowcover is compared with the snowcover area extracted from NOAA-AVHRR data taken on the same day. The applicability of the snow estimation using LANDSAT data is discussed.

  10. Gap-Filling of Landsat 7 Imagery Using the Direct Sampling Method

    KAUST Repository

    Yin, Gaohong; Mariethoz, Gregoire; McCabe, Matthew

    2016-01-01

    The failure of the Scan Line Corrector (SLC) on Landsat 7 imposed systematic data gaps on retrieved imagery and removed the capacity to provide spatially continuous fields. While a number of methods have been developed to fill these gaps, most

  11. A Useful Tool for Atmospheric Correction and Surface Temperature Estimation of Landsat Infrared Thermal Data

    Science.gov (United States)

    Rivalland, Vincent; Tardy, Benjamin; Huc, Mireille; Hagolle, Olivier; Marcq, Sébastien; Boulet, Gilles

    2016-04-01

    Land Surface temperature (LST) is a critical variable for studying the energy and water budgets at the Earth surface, and is a key component of many aspects of climate research and services. The Landsat program jointly carried out by NASA and USGS has been providing thermal infrared data for 40 years, but no associated LST product has been yet routinely proposed to community. To derive LST values, radiances measured at sensor-level need to be corrected for the atmospheric absorption, the atmospheric emission and the surface emissivity effect. Until now, existing LST products have been generated with multi channel methods such as the Temperature/Emissivity Separation (TES) adapted to ASTER data or the generalized split-window algorithm adapted to MODIS multispectral data. Those approaches are ill-adapted to the Landsat mono-window data specificity. The atmospheric correction methodology usually used for Landsat data requires detailed information about the state of the atmosphere. This information may be obtained from radio-sounding or model atmospheric reanalysis and is supplied to a radiative transfer model in order to estimate atmospheric parameters for a given coordinate. In this work, we present a new automatic tool dedicated to Landsat thermal data correction which improves the common atmospheric correction methodology by introducing the spatial dimension in the process. The python tool developed during this study, named LANDARTs for LANDsat Automatic Retrieval of surface Temperature, is fully automatic and provides atmospheric corrections for a whole Landsat tile. Vertical atmospheric conditions are downloaded from the ERA Interim dataset from ECMWF meteorological organization which provides them at 0.125 degrees resolution, at a global scale and with a 6-hour-time step. The atmospheric correction parameters are estimated on the atmospheric grid using the commercial software MODTRAN, then interpolated to 30m resolution. We detail the processing steps

  12. Assessing the value of Landsat imagery: Results from a 2012 comprehensive user survey

    Science.gov (United States)

    Miller, H. M.; Richardson, L.; Loomis, J.; Koontz, S.; Koontz, L.

    2012-12-01

    Landsat satellite imagery has long been recognized as unique among remotely sensed data due to the combination of its extensive archive, global coverage, and relatively high spatial and temporal resolution. Since the imagery became available at no cost in 2008, the number of users registered with the U.S. Geological Survey (USGS) has increased tenfold while the number of scenes downloaded annually has increased a hundredfold. It is clear that the imagery is being used extensively, and understanding the benefits provided by this imagery can help inform decisions involving its provision. However, the value of Landsat imagery is difficult to measure for a variety of reasons, one of which stems from the fact that the imagery has characteristics of a public good and does not have a direct market price to reflect its value to society. Further, there is not a clear understanding of the full range of users of the imagery, as well as how these users are distributed across the many different end uses this data is applied to. To assess the value of Landsat imagery, we conducted a survey of users registered with USGS in early 2012. Over 11,000 current users of Landsat imagery responded to the survey. The value of the imagery was measured both qualitatively and quantitatively. To explore the qualitative value of the imagery, users were asked about the importance of the imagery to their work, their dependence on the imagery, and the impacts on their work if there was no Landsat imagery. The majority of users deemed Landsat imagery important to their work and stated they were dependent on Landsat imagery to do their work. Additionally, if Landsat imagery was no longer available, over half of the users would have to discontinue some of their work. On average, these users would discontinue half of their current work if the imagery was no longer available. The focus of this presentation will be the quantitative results of a double-bounded contingent valuation analysis which reveals

  13. La imagen publicitaria de la actriz Magaly Solier: entre el exotismo y la re-afiliación

    Directory of Open Access Journals (Sweden)

    Ricardo Bedoya

    2013-10-01

    Full Text Available El artículo analiza la imagen de la actriz peruana Magaly Solier en dos construcciones publicitarias. La primera, marcada por un estilo de exotismo primitivo que busca aprovechar los componentes étnicos de la modelo; la otra, resignificando los datos biográficos y el sentido de la presencia cultural de una actriz que ha adquirido figuración internacional. En ambos casos, el análisis busca interpretar la significación de la imagen publicitaria del personaje en relación con los discursos de pacificación del país, emprendimiento y nacionalismo que la sustentan. El texto condensa el capítulo quinto de la tesis «Madeinhuanta. Tránsitos y escenarios de Magaly Solier: la construcción de un texto cultural», con el que el autor optó el grado de magíster en Antropología Visual en la Pontificia Universidad Católica del Perú, en agosto del 2012.

  14. Imagen turística de los países latinoamericanos en el mercado español

    Directory of Open Access Journals (Sweden)

    Emira Josefina Rodríguez Ducallín

    2006-01-01

    Full Text Available La imagen turística en un país es un factor clave en su elección como destino. Conocerla es de vital importancia puesto que ella permite definir su posición competitiva y establecer las estrategias de marketing para su comercialización en el mercado turístico internacional. Bajo esta perspectiva se pretendió conocer la imagen de 6 países latinoamericanos (México, Cuba, Venezuela, República Dominicana, Brasil y Centroamérica utilizando para ello un estudio descriptivo. La información se recogió de una muestra de 1.000 personas en la ciudad de Madrid, haciendo uso del diferencial semántico para valorar los atributos y se obtuvo como resultado de forma general que los países latinoamericanos son considerados por el mercado español como amigos, alegres, acogedores, con sol, buen clima entre otros, pero también fueron percibidos, inseguros, poco desarrollados, con inestabilidad política y pobres.

  15. Pensamento social, ciência e imagens do Brasil: tradições revisitadas pelos educadores brasileiros

    Directory of Open Access Journals (Sweden)

    Marcos Freitas Cezar de

    2000-01-01

    Full Text Available Este artigo analisa dois momentos decisivos no âmbito da história das idéias no Brasil. Imagens e sínteses do Brasil tornaram-se referências fundamentais na história da cultura brasileira, especialmente aquelas produzidas por uma “tradição realista”, que vem desde o século XIX, por intermédio dos escritos do Visconde do Uruguai, e prossegue com Silvio Romero, com Alberto Torres, com Oliveira Vianna e com Alberto Guerreiro Ramos. Tais autores deram vida à imagem do Brasil cindido em dois brasis: o país legal e o país real. A partir de 1902, o marco fundamental dessa tradição passará a ser Euclides da Cunha, autor que projetou o sertão como “metáfora para a nação”. Nos anos cinqüentas, ao redor de Anísio Teixeira, intelectuais como Antonio Candido, Florestan Fernandes, Luiz Pereira, Fernando de Azevedo e muitos antropólogos mergulharam novamente nas metáforas euclidianas e compuseram novas imagens sobre a cultura regional no Brasil que se modernizava

  16. La construcción de imagen y reputación de las organizaciones vía Twitter

    Directory of Open Access Journals (Sweden)

    Rebeca Illiana Arévalo Martínez

    2014-11-01

    Full Text Available La comunicación que realizan las organizaciones con sus grupos de interés ha evolucionado conforme a las innovaciones tecnológicas (Kanter, 2006, haciéndose necesario el incremento de la interacción, particularmente vía las redes sociales digitales, pero también se ha reconocido la importancia de incorporar aspectos de responsabilidad y fundamentos en valores (Kotler, Kartajava, y Setiawan, 2011 que influyan directamente en la construcción de la imagen (Capriotti, 2009 y reputación (Villafañe, 2004 de dichas organizaciones. En el presente artículo se presentan los resultados de la investigación sobre la actividad que tienen algunas organizaciones privadas en México vía Twitter, con el fin de identificar cómo desarrollan su imagen y reputación a partir de su estrategia en el uso de esta red social digital y cómo es que pueden generar una comunicación de doble vía con sus grupos de interés para tener una interacción e influencia sostenida en el tiempo.

  17. Vender imagen: la propaganda estadounidense en Irán entre 1950 y 1953

    Directory of Open Access Journals (Sweden)

    Alejandro Crespo Jusdado

    2009-12-01

    Full Text Available Un vistazo a la campaña de propaganda de los Estados Unidos en Irán a principios de los años Cincuenta, durante el gobierno del Dr. Mossadeq, y en el contexto global de la Guerra Fría. Sus objetivos, medios y logros, a través del análisis de una serie de documentos. Por medio del Departamento de Estado y utilizando los recursos de las Embajadas en los respectivos países, se diseñaron una serie de medidas con el objetivo de “vender” la imagen de los Estados Unidos y de la democracia occidental, para crear en el subconsciente de los habitantes de los países árabes una impresión positiva de Occidente y del american way of life. A su vez, se mostraría la “falacia” de la doctrina comunista y los efectos desastrosos que tendría para las respectivas naciones y sus vecinos el hecho de que la URSS lograse obtener una influencia importante en la zona. En el fondo se trataba del principio básico de la publicidad: conseguir que el público compre tu producto por delante del de la competencia.____________________ABSTRACT:This article treats about the propaganda campaign of the United States in Iran in the early fifties, during the government of Dr. Mossadeq and in the Cold War context: i.e. its objectives, means and achievements, through the analysis of a series of documents. Through the Department of State and using the resources of the Embassies in the respective countries, it has been designed a series of measures to "sell" the image of the United States and Western democracy, in order to create in the subconscious of the inhabitants of the Arab countries a positive impression of the West and the American way of life. Meanwhile, this propaganda showed the "fallacy" of the communist doctrine and the disastrous effects that USSR achieved a major influence in the area would have for the respective nations and their neighbors. Basically it was the basic principle of advertising: to get the public to buy your product before the one of the

  18. Linguagem, cultura e alteridade: imagens do outro Language, culture and otherness: children and ethinicity

    Directory of Open Access Journals (Sweden)

    Neusa Maria Mendes de Gusmão

    1999-07-01

    Full Text Available A interação a um só tempo complementar e conflitiva de três temas: linguagem, cultura e alteridade, constituem o eixo de um debate sobre a infância e a criança portadora de marcas sociais e étnicas. Na medida em que a percepção do social se prende a princípios e a valores considerados universais, verdadeiros, legítimos e únicos, que precisam ser relativizados, questiona-se o fato de a cultura e a alteridade se expressarem por linguagens nem sempre visíveis e explícitas, que exigem um olhar atento e aprofundado nas muitas realidades do campo social e no seu cotidiano como meio de compreender-lhes seus muitos significados. Crianças pobres de periferia urbana e do meio rural, crianças brancas, negras e mestiças e, ainda, crianças de rua, emprestam-nos suas falas e imagens construídas com desenhos, para expressar a sua percepção do meio em que vivem. Tais expressões referem-se também à escola que aí está, a seus processos e agentes para dizer, por meio de outras linguagens, como olham seu mundo e como são olhados por ele.Language, culture, and otherness are complementary and also confliting issues representing the central debate on childhood and the child who carries the signals of social and/or ethinical of exclusion. The debate on the social still connected to universal and absolute values and trues, therefore the theme needs a reavaliation on the realm of relativism. Questioning the fact that culture and otherness are expressed by language which are not always visible and explicit, requering a close and deep look at many social realities enpoorvered suburbs and rural areas, white and black children, homeless children, we kept their voices and speaches, their images from their own drawings to understand the way the percept mean they live and they are. These children have a word for school, and also about the process and agents to say by many different ways to express how they look their own world and how the world look

  19. Estéticas tecnológicas en la imagen educativa

    Directory of Open Access Journals (Sweden)

    Kuchen, Regina Elena

    2012-01-01

    Full Text Available [es] Las estéticas tecnológicas son tomadas como puerta de entrada para el estudio de las imágenes destinadas a la transmisión de conocimiento. El análisis de un libro sobre el cuerpo humano es el pretexto para desarrollar la hipótesis de que las estéticas tecnológicas exteriorizan fenómenos más profundos y generales, que lejos de acotarse a la inscripción de éstas en el imaginario técnico contemporáneo, dan cuenta de la dinámica interna de la cultura visual.El propósito de estas observaciones, más allá de la descripción de las estéticas tecnológicas en el entramado de relaciones entre los códigos de la percepción, de la representación y del saber (planos de codificación relevantes en nuestra cultura visual, es contribuir a reconsiderar el potencial cognitivo de las imágenes para pensar proyectivamente la producción de textos visuales que exploten la potencialidad lúdica, heurística y sinérgica de la imagen, en la transmisión de conocimiento. [en] Technological esthetics is considered a door that enables the study of images aimed at knowledge transmission. The analysis of a book about a human body is an excuse for the hypothesis development that techological esthetics externalizes deeper and broader phenomena that far from being restricted to its inscription in contemporary technical representations account for the internal dynamics of the visual culture.The aim of these observations beyond the description of technological esthetics in a web wound round relations among perception, representation and knowledege codes (codification planes relevant to our visual culture is to contribute to a reappraisal of the cognitive potential of images in order to think in a prospective way about the production of visual texts that exploit the playful, heuristic and synergetic potentiality of images for knowledge transmission.

  20. Zara: Imagen de marca internacional y debut en la venta online en Europa occidental

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    Noemí Martínez Caraballo

    2011-11-01

    Full Text Available Objeto: Zara abrió en España, Francia, Alemania, Reino Unido, Italia y Portugal su tienda online en la campaña otoño/invierno 2010. Se trata de un paso estratégico importante, encuadrado en la búsqueda que el Grupo Inditex realiza diariamente para ofrecer el mejor servicio a los clientes en todo el mundo. El presente trabajo analiza la notoriedad de marca de Zara y las posibilidades que plantea Internet como herramienta de comunicación y como canal de distribución.Diseño/metodología: Se presenta un análisis descriptivo de la experiencia de Zara desde el lanzamiento de zara.com desde septiembre de 2010. Se muestra, además, un análisis comparativo respecto a dos de sus competidores: H&M y Mango.Resultados: Se observa cómo Zara parece estar superando en alcance y en número de páginas vistas a Mango, pero todavía no alcanza los niveles de H&M, a nivel internacional.Limitaciones: Se trata de un artículo descriptivo; no se han podido analizar con detalle los resultados de la venta online de Zara debido a su reciente incorporación en este canal de distribución y a que la política del Grupo Inditex es esperar a que transcurran doce meses de funcionamiento de la tienda virtual para ofrecer los primeros resultados.Implicaciones prácticas: Conocer la estrategia emprendida por Zara y sus competidores para, a través del comercio electrónico, lograr consolidar su imagen de marca internacional. Ello permite perfilar recomendaciones para los gestores y que la incursión en el canal de venta online sea un éxito.Valor añadido: Dada la situación de recesión económica en que nos encontramos y debido al papel protagonista que está tomando el sector textil en la comercialización y venta online en España en los últimos meses, el comercio electrónico en el sector textil resulta un tema de gran actualidad. Además, se centra en una de las empresas españolas que más estudios ha acaparado gracias a su indudable éxito.

  1. Diazo processing of LANDSAT imagery: A low-cost instructional technique

    Science.gov (United States)

    Lusch, D. P.

    1981-01-01

    Diazo processing of LANDSAT imagery is a relatively simple and cost effective method of producing enhanced renditions of the visual LANDSAT products. This technique is capable of producing a variety of image enhancements which have value in a teaching laboratory environment. Additionally, with the appropriate equipment, applications research which relys on accurate and repeatable results is possible. Exposure and development equipment options, diazo materials, and enhancement routines are discussed.

  2. Preliminary analysis of the potential of LANDSAT imagery to study desertification. [Xique-Xique, Brazil

    Science.gov (United States)

    Dejesusparada, N. (Principal Investigator); Lombardo, M. A.; Decarvalho, V. C.

    1980-01-01

    The use of LANDSAT imagery to define and delimit areas under process of desertification was investigated. Imagery for two different years (1973 and 1978) and two different seasons (dry and rainy seasons in 1976), were used to identify terrain morphology and vegetation cover. The analysis of LANDSAT interpretation, combined with geological and soil information obtained from published literature, allowed the identification of eleven ecological units which were classified corresponding to the degree of the Xique Xique region of Rio Sao Francisco.

  3. Data fusion of Landsat TM and IRS images in forest classification

    Science.gov (United States)

    Guangxing Wang; Markus Holopainen; Eero Lukkarinen

    2000-01-01

    Data fusion of Landsat TM images and Indian Remote Sensing satellite panchromatic image (IRS-1C PAN) was studied and compared to the use of TM or IRS image only. The aim was to combine the high spatial resolution of IRS-1C PAN to the high spectral resolution of Landsat TM images using a data fusion algorithm. The ground truth of the study was based on a sample of 1,020...

  4. Evaluation of directional normalization methods for Landsat TM/ETM+ over primary Amazonian lowland forests

    Science.gov (United States)

    Van doninck, Jasper; Tuomisto, Hanna

    2017-06-01

    Biodiversity mapping in extensive tropical forest areas poses a major challenge for the interpretation of Landsat images, because floristically clearly distinct forest types may show little difference in reflectance. In such cases, the effects of the bidirectional reflection distribution function (BRDF) can be sufficiently strong to cause erroneous image interpretation and classification. Since the opening of the Landsat archive in 2008, several BRDF normalization methods for Landsat have been developed. The simplest of these consist of an empirical view angle normalization, whereas more complex approaches apply the semi-empirical Ross-Li BRDF model and the MODIS MCD43-series of products to normalize directional Landsat reflectance to standard view and solar angles. Here we quantify the effect of surface anisotropy on Landsat TM/ETM+ images over old-growth Amazonian forests, and evaluate five angular normalization approaches. Even for the narrow swath of the Landsat sensors, we observed directional effects in all spectral bands. Those normalization methods that are based on removing the surface reflectance gradient as observed in each image were adequate to normalize TM/ETM+ imagery to nadir viewing, but were less suitable for multitemporal analysis when the solar vector varied strongly among images. Approaches based on the MODIS BRDF model parameters successfully reduced directional effects in the visible bands, but removed only half of the systematic errors in the infrared bands. The best results were obtained when the semi-empirical BRDF model was calibrated using pairs of Landsat observation. This method produces a single set of BRDF parameters, which can then be used to operationally normalize Landsat TM/ETM+ imagery over Amazonian forests to nadir viewing and a standard solar configuration.

  5. Comparison of Landsat-8 and Sentinel-2A reflectance and normalized difference vegetation index

    Science.gov (United States)

    Zhang, H.; Roy, D. P.; Yan, L.; Li, Z.; Huang, H.

    2017-12-01

    The moderate spatial resolution satellite data from the polar-orbiting Landsat-8 (launched 2013) and Sentinel-2A (launched 2015) sensors provide 10 m to 30 m multi-spectral global coverage with a better than 5-day revisit. Although a national laboratory traceable cross-calibration comparison of the Landsat-8 Operational Land Imager (OLI) and the Sentinel-2A MultiSpectral Instrument (MSI) was undertaken pre-launch, there are a number of other sensor differences, notably due to spectral, spatial and angular differences. To examine these in a comprehensive way, Landsat-8 and Sentinel-2A data for approximately 20° × 10° of southern Africa acquired in the summer (January to March) and winter (July to September) of 2016 were compared. Only Landsat-8 and Sentinel-2A observations acquired within one-day apart were considered. The sensor data were registered and then each orbit projected into 30 m fixed global Web Enabled Landsat Data (GWELD) tiles defined in the MODIS sinusoidal equal area projection. Only corresponding sensor observations of each 30 m tile pixel that were flagged as cloud and snow-free, unsaturated, and that had no significant change in their one day separation, were compared. Both the Landsat-8 and Sentinel-2A data were atmospherically corrected using the Landsat Surface Reflectance Code (LaSRC) and were also corrected to nadir BRDF adjusted reflectance (NBAR). Top of atmosphere and surface reflectance for the spectrally corresponding visible, near infrared and shortwave infrared OLI and MSI bands, and derived normalized difference vegetation index (NDVI), were compared and their differences quantified using regression analyses. The resulting statistical transformations may be used to improve the consistency between the Landsat-8 OLI and Sentinel-2A MSI data. The importance and sensitivity of the results to correct filtering, atmospheric correction and adjustment to NBAR is demonstrated.

  6. Thermal Infrared Radiometric Calibration of the Entire Landsat 4, 5, and 7 Archive (1982-2010)

    Science.gov (United States)

    Schott, John R.; Hook, Simon J.; Barsi, Julia A.; Markham, Brian L.; Miller, Jonathan; Padula, Francis P.; Raqueno, Nina G.

    2012-01-01

    Landsat's continuing record of the thermal state of the earth's surface represents the only long term (1982 to the present) global record with spatial scales appropriate for human scale studies (i.e., tens of meters). Temperature drives many of the physical and biological processes that impact the global and local environment. As our knowledge of, and interest in, the role of temperature on these processes have grown, the value of Landsat data to monitor trends and process has also grown. The value of the Landsat thermal data archive will continue to grow as we develop more effective ways to study the long term processes and trends affecting the planet. However, in order to take proper advantage of the thermal data, we need to be able to convert the data to surface temperatures. A critical step in this process is to have the entire archive completely and consistently calibrated into absolute radiance so that it can be atmospherically compensated to surface leaving radiance and then to surface radiometric temperature. This paper addresses the methods and procedures that have been used to perform the radiometric calibration of the earliest sizable thermal data set in the archive (Landsat 4 data). The completion of this effort along with the updated calibration of the earlier (1985 1999) Landsat 5 data, also reported here, concludes a comprehensive calibration of the Landsat thermal archive of data from 1982 to the present

  7. Use of Landsat data to predict the trophic state of Minnesota lakes

    Science.gov (United States)

    Lillesand, T. M.; Johnson, W. L.; Deuell, R. L.; Lindstrom, O. M.; Meisner, D. E.

    1983-01-01

    Near-concurrent Landsat Multispectral Scanner (MSS) and ground data were obtained for 60 lakes distributed in two Landsat scene areas. The ground data included measurement of secchi disk depth, chlorophyll-a, total phosphorous, turbidity, color, and total nitrogen, as well as Carlson Trophic State Index (TSI) values derived from the first three parameters. The Landsat data best correlated with the TSI values. Prediction models were developed to classify some 100 'test' lakes appearing in the two analysis scenes on the basis of TSI estimates. Clouds, wind, poor image data, small lake size, and shallow lake depth caused some problems in lake TSI prediction. Overall, however, the Landsat-predicted TSI estimates were judged to be very reliable for the secchi-derived TSI estimation, moderately reliable for prediction of the chlorophyll-a TSI, and unreliable for the phosphorous value. Numerous Landsat data extraction procedures were compared, and the success of the Landsat TSI prediction models was a strong function of the procedure employed.

  8. Georgia resource assessment project: Institutionalizing LANDSAT and geographic data base techniques

    Science.gov (United States)

    Pierce, R. R.; Rado, B. Q.; Faust, N.

    1981-01-01

    Digital data from LANDSAT for each 1.1-acre cell in Georgia were processed and the land cover conditions were categorized. Several test cases were completed and an operational hardware and software processing capability was established at the Georgia Institute of Technology. The operational capability was developed to process the entire state (60,000 sq. miles and 14 LANDSAT scenes) in a cooperative project between eleven divisions and agencies at the regional, state, and federal levels. Products were developed for State agencies such as in both mapped and statistical formats. A computerized geographical data base was developed for management programs. To a large extent the applications of the data base evolved as users of LANDSAT information requested that other data (i.e., soils, slope, land use, etc.) be made compatible with LANDSAT for management programs. To date, geographic data bases incorporating LANDSAT and other spatial data deal with elements of the municipal solid waste management program, and reservoir management for the Corps of Engineers. LANDSAT data are also being used for applications in wetland, wildlife, and forestry management.

  9. An Improved Physics-Based Model for Topographic Correction of Landsat TM Images

    Directory of Open Access Journals (Sweden)

    Ainong Li

    2015-05-01

    Full Text Available Optical remotely sensed images in mountainous areas are subject to radiometric distortions induced by topographic effects, which need to be corrected before quantitative applications. Based on Li model and Sandmeier model, this paper proposed an improved physics-based model for the topographic correction of Landsat Thematic Mapper (TM images. The model employed Normalized Difference Vegetation Index (NDVI thresholds to approximately divide land targets into eleven groups, due to NDVI’s lower sensitivity to topography and its significant role in indicating land cover type. Within each group of terrestrial targets, corresponding MODIS BRDF (Bidirectional Reflectance Distribution Function products were used to account for land surface’s BRDF effect, and topographic effects are corrected without Lambertian assumption. The methodology was tested with two TM scenes of severely rugged mountain areas acquired under different sun elevation angles. Results demonstrated that reflectance of sun-averted slopes was evidently enhanced, and the overall quality of images was improved with topographic effect being effectively suppressed. Correlation coefficients between Near Infra-Red band reflectance and illumination condition reduced almost to zero, and coefficients of variance also showed some reduction. By comparison with the other two physics-based models (Sandmeier model and Li model, the proposed model showed favorable results on two tested Landsat scenes. With the almost half-century accumulation of Landsat data and the successive launch and operation of Landsat 8, the improved model in this paper can be potentially helpful for the topographic correction of Landsat and Landsat-like data.

  10. Mount Ararat, Turkey, Perspective with Landsat Image Overlay

    Science.gov (United States)

    2004-01-01

    This perspective view shows Mount Ararat in easternmost Turkey, which has been the site of several searches for the remains of Noah's Ark. The main peak, known as Great Ararat, is the tallest peak in Turkey, rising to 5165 meters (16,945 feet). This southerly, near horizontal view additionally shows the distinctly conically shaped peak known as 'Little Ararat' on the left. Both peaks are volcanoes that are geologically young, but activity during historic times is uncertain.This image was generated from a Landsat satellite image draped over an elevation model produced by the Shuttle Radar Topography Mission (SRTM). The view uses a 1.25-times vertical exaggeration to enhance topographic expression. Natural colors of the scene are enhanced by image processing, inclusion of some infrared reflectance (as green) to highlight the vegetation pattern, and inclusion of shading of the elevation model to further highlight the topographic features. Volcanoes pose hazards for people, the most obvious being the threat of eruption. But other hazards are associated with volcanoes too. In 1840 an earthquake shook the Mount Ararat region, causing an unstable part of mountain's north slope to tumble into and destroy a village. Visualizations of satellite imagery when combined with elevation models can be used to reveal such hazards leading to disaster prevention through improved land use planning.But the hazards of volcanoes are balanced in part by the benefits they provide. Over geologic time volcanic materials break down to form fertile soils. Cultivation of these soils has fostered and sustained civilizations, as has occurred in the Mount Ararat region. Likewise, tall volcanic peaks often catch precipitation, providing a water supply to those civilizations. Mount Ararat hosts an icefield and set of glaciers, as seen here in this late summer scene, that are part of this beneficial natural processElevation data used in this image was acquired by the Shuttle Radar Topography Mission

  11. Suppression of vegetation in LANDSAT ETM+ remote sensing images

    Science.gov (United States)

    Yu, Le; Porwal, Alok; Holden, Eun-Jung; Dentith, Michael

    2010-05-01

    Vegetation cover is an impediment to the interpretation of multispectral remote sensing images for geological applications, especially in densely vegetated terrains. In order to enhance the underlying geological information in such terrains, it is desirable to suppress the reflectance component of vegetation. One form of spectral unmixing that has been successfully used for vegetation reflectance suppression in multispectral images is called "forced invariance". It is based on segregating components of the reflectance spectrum that are invariant with respect to a specific spectral index such as the NDVI. The forced invariance method uses algorithms such as software defoliation. However, the outputs of software defoliation are single channel data, which are not amenable to geological interpretations. Crippen and Blom (2001) proposed a new forced invariance algorithm that utilizes band statistics, rather than band ratios. The authors demonstrated the effectiveness of their algorithms on a LANDSAT TM scene from Nevada, USA, especially in open canopy areas in mixed and semi-arid terrains. In this presentation, we report the results of our experimentation with this algorithm on a densely to sparsely vegetated Landsat ETM+ scene. We selected a scene (Path 119, Row 39) acquired on 18th July, 2004. Two study areas located around the city of Hangzhou, eastern China were tested. One of them covers uninhabited hilly terrain characterized by low rugged topography, parts of the hills are densely vegetated; another one covers both inhabited urban areas and uninhabited hilly terrain, which is densely vegetated. Crippen and Blom's algorithm is implemented in the following sequential steps: (1) dark pixel correction; (2) vegetation index calculation; (3) estimation of statistical relationship between vegetation index and digital number (DN) values for each band; (4) calculation of a smooth best-fit curve for the above relationships; and finally, (5) selection of a target average DN

  12. El Papel de la Cualidad del Servicio y de la Imagen de la Tienda em la Experiencia de Consumo de Servicios Automotrices.

    Directory of Open Access Journals (Sweden)

    Ieda Pedógia Martins Damian

    2014-06-01

    Full Text Available Los servicios han desempeñado un papel cada vez más relevante, al agregar valor a los consumidores. En ese sentido, la evaluación de la experiencia de consumo en relación a esos servicios es importante para los minoristas que actúan en ambientes competitivos. El objetivo de este trabajo es analizar el papel de la cualidad del servicio y de la imagen de la tienda en la experiencia de consumo de servicios automotrices. El estudio fue dividido en dos momentos. En el primero se realizó una investigación cuantitativa (survey con 1346 consumidores, con el objetivo de obtener de ellos una evaluación de los atributos de imagen y cualidad y su contribución para una evaluación positiva de la experiencia de consumo. En seguida, fue realizada una investigación cualitativa, del tipo grupo enfocado, para discutir los resultados obtenidos en la investigación cuantitativa. La principal contribución del estudio fue dejar evidente la relevancia de los aspectos relacionados a la imagen del prestador del servicio. Se debe destacar que la imagen presentó, en la investigación, un papel tan relevante cuanto el de los elementos directamente relacionados a la cualidad de los servicios para el desarrollo de una experiencia de consumo agradable.

  13. Maestros, Imágenes e Imaginarios Prácticas y saberes en relación con la didáctica de la imagen

    Directory of Open Access Journals (Sweden)

    Rafael Barragán Gómez

    2011-12-01

    Full Text Available los imaginarios de los maestros en torno a la imagen y los lenguajes verbo-visuales en dos instituciones educativas. Apoyado en una metodología etnográfica, el proyecto busca establecer la manera como tales imaginarios se articulan con unas prácticas edu

  14. Relación entre la imagen corporal y los trastornos del comportamiento alimentario en una serie de jóvenes españoles y argentinos

    Directory of Open Access Journals (Sweden)

    Marrodán, María D.

    2007-01-01

    Full Text Available Se analizó la conformidad con la imagen corporal y prevalencia de trastornos del comportamiento alimentario (TCA en una muestra de 517 jóvenes españoles y 490 argentinos. Se calculó el índice de masa corporal (IMC y se relacionó la imagen real con la estimada mediante un método gráfico de siluetas. Para conocer la conducta alimentaria se utilizó un el test psicométrico de respuesta múltiple. Respecto a la autopercepción no existen diferencias significativas en función del país de origen pero si hay diferencias de género. También se tuvieron en cuenta las preferencias por el sexo contrario, así como la imagen considerada más saludable. La insatisfacción con la propia imagen aparece como probable factor de predisposición al desarrollo de TCA, que presenta una frecuencia mas elevada en la serie femenina española.

  15. Improving the mapping of crop types in the Midwestern U.S. by fusing Landsat and MODIS satellite data

    Science.gov (United States)

    Zhu, Likai; Radeloff, Volker C.; Ives, Anthony R.

    2017-06-01

    Mapping crop types is of great importance for assessing agricultural production, land-use patterns, and the environmental effects of agriculture. Indeed, both radiometric and spatial resolution of Landsat's sensors images are optimized for cropland monitoring. However, accurate mapping of crop types requires frequent cloud-free images during the growing season, which are often not available, and this raises the question of whether Landsat data can be combined with data from other satellites. Here, our goal is to evaluate to what degree fusing Landsat with MODIS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) data can improve crop-type classification. Choosing either one or two images from all cloud-free Landsat observations available for the Arlington Agricultural Research Station area in Wisconsin from 2010 to 2014, we generated 87 combinations of images, and used each combination as input into the Spatial and Temporal Adaptive Reflectance Fusion Model (STARFM) algorithm to predict Landsat-like images at the nominal dates of each 8-day MODIS NBAR product. Both the original Landsat and STARFM-predicted images were then classified with a support vector machine (SVM), and we compared the classification errors of three scenarios: 1) classifying the one or two original Landsat images of each combination only, 2) classifying the one or two original Landsat images plus all STARFM-predicted images, and 3) classifying the one or two original Landsat images together with STARFM-predicted images for key dates. Our results indicated that using two Landsat images as the input of STARFM did not significantly improve the STARFM predictions compared to using only one, and predictions using Landsat images between July and August as input were most accurate. Including all STARFM-predicted images together with the Landsat images significantly increased average classification error by 4% points (from 21% to 25%) compared to using only Landsat

  16. Mapeamento de áreas aluvionares no semiárido brasileiro por meio de dados colaterais e imagens orbitais Mapping alluvial areas in semi-arid region of Brazil through collateral data and satellite images

    Directory of Open Access Journals (Sweden)

    Helio L. Lopes

    2013-07-01

    Full Text Available A região semiárida do Brasil possui grande potencial para armazenamento de água em áreas aluvionares, podendo potencializar a pequena agricultura. Verifica-se a necessidade de uma metodologia para mapeamento dessas áreas, com o objetivo de futuros estudos in loco para implantação de barragens subterrâneas e manejo correto dos solos aluvionares. Neste sentido, objetivou-se a aplicação de imagens Landsat- Mapeador Temático 5 em conjunto com dados colaterais, como a rede de drenagem, mapa de classes de solo e mapa de relevo para auxiliar na classificação de terraços aluviais. Teve-se, como área de estudo, a bacia do Rio Pajeú, no sertão do estado de Pernambuco. Buscou-se também, por meio de dados SRTM (Shuttle Radar Topography Mission, a avaliação topográfica das áreas classificadas. Verifica-se que a utilização única de dados orbitais traz classificação incongruente mas com a inserção de dados colaterais é possível obter melhores resultados na classificação. A rede de drenagem é fundamental no mascaramento de classificações espúrias. Quando procede à análise topográfica por meio de dados do SRTM das áreas classificadas como terraços aluvionares, observa-se a inconsistência desses dados.The semi-arid region of Brazil has great potential for storing water in alluvial areas, and may give support to small-scale family farming. There is a need to establish a methodology for mapping these areas with the objective of future studies to implement underground dams and suitable management of the soils that occur on alluvial terraces. In this way, the aim of this study was to apply Landsat-Thematic Mapper images together with collateral data such as the drainage network, map of soil classes and elevation data to assist in the classification of alluvial terraces. The study area was Pajeú River basin located in the 'Caatinga' ecosystem of the Pernambuco state. Topographic assessment of the alluvial areas was done by

  17. Exploring TM image texture and its relationships with biomass estimation in Rondônia, Brazilian Amazon Explorando texturas de imagens TM e suas relações com estimativas de biomassa em Rondônia

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    Dengsheng Lu

    2005-06-01

    Full Text Available Many texture measures have been developed and used for improving land-cover classification accuracy, but rarely has research examined the role of textures in improving the performance of aboveground biomass estimations. The relationship between texture and biomass is poorly understood. This paper used Landsat Thematic Mapper (TM data to explore relationships between TM image textures and aboveground biomass in Rondônia, Brazilian Amazon. Eight grey level co-occurrence matrix (GLCM based texture measures (i.e., mean, variance, homogeneity, contrast, dissimilarity, entropy, second moment, and correlation, associated with seven different window sizes (5x5, 7x7, 9x9, 11x11, 15x15, 19x19, and 25x25, and five TM bands (TM 2, 3, 4, 5, and 7 were analyzed. Pearson's correlation coefficient was used to analyze texture and biomass relationships. This research indicates that most textures are weakly correlated with successional vegetation biomass, but some textures are significantly correlated with mature forest biomass. In contrast, TM spectral signatures are significantly correlated with successional vegetation biomass, but weakly correlated with mature forest biomass. Our findings imply that textures may be critical in improving mature forest biomass estimation, but relatively less important for successional vegetation biomass estimation.Muitas medidas de textura têm sido desenvolvidas e utilizadas para melhorar a acurácia de classificações de cobertura das terras, mas raramente têm-se avaliado a importância dessas medidas em estimativas de biomassa. Este trabalho utilizou dados Landsat TM para explorar as relações entre texturas de imagens TM e biomassa em Rondônia, Amazônia. Foram analisadas oito medidas de textura baseadas em matrizes de co-ocorrência de tons de cinza (i.e., média, variância, homogeneidade, contraste, dissimilaridade, entropia, segundo momento e correlação, associadas com sete diferentes tamanhos de janela (5x5, 7x7

  18. An analysis of Landsat-4 Thematic Mapper geometric properties

    Science.gov (United States)

    Walker, R. E.; Zobrist, A. L.; Bryant, N. A.; Gohkman, B.; Friedman, S. Z.; Logan, T. L.

    1984-01-01

    Landsat-4 Thematic Mapper data of Washington, DC, Harrisburg, PA, and Salton Sea, CA were analyzed to determine geometric integrity and conformity of the data to known earth surface geometry. Several tests were performed. Intraband correlation and interband registration were investigated. No problems were observed in the intraband analysis, and aside from indications of slight misregistration between bands of the primary versus bands of the secondary focal planes, interband registration was well within the specified tolerances. A substantial number of ground control points were found and used to check the images' conformity to the Space Oblique Mercator (SOM) projection of their respective areas. The means of the residual offsets, which included nonprocessing related measurement errors, were close to the one pixel level in the two scenes examined. The Harrisburg scene residual mean was 28.38 m (0.95 pixels) with a standard deviation of 19.82 m (0.66 pixels), while the mean and standard deviation for the Salton Sea scene were 40.46 (1.35 pixels) and 30.57 m (1.02 pixels), respectively. Overall, the data were judged to be a high geometric quality with errors close to those targeted by the TM sensor design specifications.

  19. An assessment of areal evapotranspiration using Landsat TM data

    Energy Technology Data Exchange (ETDEWEB)

    Chae, Hyo-Sok; Park, Jae-Young [Water Resources Research Institute, Taejeon(Korea); Song, Young-Soo [Chonbuk National Univ., Chonju(Korea)

    2000-08-31

    Surface energy balance components were evaluated by Landsat TM data and GIS with meteorological data. Calibration and validation for the applicability of this methodology were made through the estimating of the large-scale evapotranspiration (ET). In addition, sensitivity and error analysis was conducted to see the effects of the surface energy balance components on ET and the accuracy of each components. Bochong-chon located on the upper part of Guem River basin was selected as the case study area. Spatial distribution map of ET were produced for five dates: Jan. 1, Apr. 3, May. 10, and Nov. 27, 1995. The study results showed that ET was greatly varied with the aspect and the land use type on the surface. In the case of having northeast and southeast in the aspect, ET was linearly increased depending on growing net radiation. While surface temperature has a high value, NDVI(Normalized Difference Vegetation Index) has a low value in the vegetated area. Therefore, ground heat flux was increased but ET was relatively decreased. The results of sensitivity and error analysis showed that net radiation is most sensitive and effective, ranging from 12.5% to 23.6% of sensitivity. Furthermore, the surface temperature, air temperature, and wind speed have the significant effects on ET estimation using remotely sensed data. (author). 26 refs., 4 tabs., 8 figs.

  20. Improved outgassing models for the Landsat-5 thematic mapper

    Science.gov (United States)

    Micijevic, E.; Chander, G.; Hayes, R.W.

    2008-01-01

    The Landsat-5 (L5) Thematic Mapper (TM) detectors of the short wave infrared (SWIR) bands 5 and 7 are maintained on cryogenic temperatures to minimize thermal noise and allow adequate detection of scene energy. Over the instrument's lifetime, gain oscillations are observed in these bands that are caused by an ice-like contaminant that gradually builds up on the window of a dewar that houses these bands' detectors. This process of icing, an effect of material outgassing in space, is detected and characterized through observations of Internal Calibrator (IC) data. Analyses of IC data indicated three to five percent uncertainty in absolute gain estimates due to this icing phenomenon. The thin-film interference lifetime models implemented in the image product generation systems at the U.S. Geological Survey (USGS) Center for Earth Resources Observation and Science (EROS) successfully remove up to 80 percent of the icing effects for the image acquisition period from the satellite's launch in 1984 until 2001; however, their correction ability was found to be much lower for the time thereafter. This study concentrates on improving the estimates of the contaminant film growth rate and the associated change in the period of gain oscillations. The goal is to provide model parameters with the potential to correct 70 to 80 percent of gain uncertainties caused by outgassing effects in L5 TM bands 5 and 7 over the instrument's entire lifetime. ?? 2007 IEEE.

  1. Automated Method for Monitoring Water Quality Using Landsat Imagery

    Directory of Open Access Journals (Sweden)

    D. Clay Barrett

    2016-06-01

    Full Text Available Regular monitoring of water quality is increasingly necessary to keep pace with rapid environmental change and protect human health and well-being. Remote sensing has been suggested as a potential solution for monitoring certain water quality parameters without the need for in situ sampling, but universal methods and tools are lacking. While many studies have developed predictive relationships between remotely sensed surface reflectance and water parameters, these relationships are often unique to a particular geographic region and have little applicability in other areas. In order to remotely monitor water quality, these relationships must be developed on a region by region basis. This paper presents an automated method for processing remotely sensed images from Landsat Thematic Mapper (TM and Enhanced Thematic Mapper Plus (ETM+ and extracting corrected reflectance measurements around known sample locations to allow rapid development of predictive water quality relationships to improve remote monitoring. Using open Python scripting, this study (1 provides an openly accessible and simple method for processing publicly available remote sensing data; and (2 allows determination of relationships between sampled water quality parameters and reflectance values to ultimately allow predictive monitoring. The method is demonstrated through a case study of the Ozark/Ouchita-Appalachian ecoregion in eastern Oklahoma using data collected for the Beneficial Use Monitoring Program (BUMP.

  2. LANDSAT M. S. S. IMAGE MOSAIC OF TUNISIA.

    Science.gov (United States)

    Boswell-Thomas, J. C.; ,

    1984-01-01

    The Landsat mosaic of Tunisia funded by USAID for the Remote Sensing Laboratory, Soils Division, Ministry of Agriculture, Tunisia, was completed by the USGS in September 1983. It is a mixed mosaic associating digital corrections and enhancements to manual mosaicking and corresponding to the Tunisian request for high resolution and the limited available funds. The scenes were processed by the Environmental Research Institute of Michigan, resampling the data geodesically corrected to fit the Universal Transverse Mercator projection using control points from topographic maps at 1:50,000 and 1:100,000 scales available in the U. S. The mosaicking was done in the Eastern Mapping Center under the supervision of the Graphic Arts System Section. The three black and white mosaics were made at the 1:1,000,000 scale and various products generated. They included color film positives at 1:2,000,000 and 1:4,000,000 scales reproducible in the Remote Sensing Laboratory in Tunis and corresponding color prints as well as tricolor prints at various scales from 1:500,000 to 1:2,000,000.

  3. Landsat Thematic Mapper digital information content for agricultural environments

    Science.gov (United States)

    Haack, Barry; Bryant, Nevin; Adams, Steven

    1986-01-01

    Landsat Thematic Mapper (TM) data collected for Imperial Valley, California in December, 1982 were digitally examined to assess their utility to distinguish among agricultural and other land-covers. Statistics for thirty-seven training sites representing a variety of crops plus urban, water and desert land-covers were obtained and analyzed using transformed divergence (TD) calculations. TD values were employed to assess intraclass variability and the best bands for classification. Four subscenes were selected for clustering or unsupervised signature extraction. These areas were agriculture, urban, desert and water land-covers. The number of clusters for these subscenes were examined and the best TM bands for interclass separability were identified. The results of the clustering and training site analyses for interclass separability were compared. The TM data were useful for the digital delimitation of most crops and other cover types in this analysis. Four bands of data are adequate for classification with the best results obtained by the selection of one band from each of the available portions of the electromagnetic spectrum. Different band combinations are best for various land-cover intraclass separability.

  4. Velocities of antarctic outlet glaciers determined from sequential Landsat images

    Science.gov (United States)

    MacDonald, Thomas R.; Ferrigno, Jane G.; Williams, Richard S.; Lucchitta, Baerbel K.

    1989-01-01

    Approximately 91.0 percent of the volume of present-day glacier ice on Earth is in Antarctica; Greenland contains about another 8.3 percent of the volume. Thus, together, these two great ice sheets account for an estimated 99.3 percent of the total. Long-term changes in the volume of glacier ice on our planet are the result of global climate change. Because of the relationship of global ice volume to sea level (± 330 cubic kilometers of glacier ice equals ± 1 millimeter sea level), changes in the mass balance of the antarctic ice sheet are of particular importance.Whether the mass balance of the east and west antarctic ice sheets is positive or negative is not known. Estimates of mass input by total annual precipitation for the continent have been made from scattered meteorological observations (Swithinbank 1985). The magnitude of annual ablation of the ice sheet from calving of outlet glaciers and ice shelves is also not well known. Although the velocities of outlet glaciers can be determined from field measurements during the austral summer,the technique is costly, does not cover a complete annual cycle,and has been applied to just a few glaciers. To increase the number of outlet glaciers in Antarctica for which velocities have been determined and to provide additional data for under-standing the dynamics of the antarctic ice sheets and their response to global climate change, sequential Landsat image of several outlet glaciers were measured.

  5. Automated mapping of persistent ice and snow cover across the western U.S. with Landsat

    Science.gov (United States)

    Selkowitz, David J.; Forster, Richard R.

    2016-01-01

    We implemented an automated approach for mapping persistent ice and snow cover (PISC) across the conterminous western U.S. using all available Landsat TM and ETM+ scenes acquired during the late summer/early fall period between 2010 and 2014. Two separate validation approaches indicate this dataset provides a more accurate representation of glacial ice and perennial snow cover for the region than either the U.S. glacier database derived from US Geological Survey (USGS) Digital Raster Graphics (DRG) maps (based on aerial photography primarily from the 1960s–1980s) or the National Land Cover Database 2011 perennial ice and snow cover class. Our 2010–2014 Landsat-derived dataset indicates 28% less glacier and perennial snow cover than the USGS DRG dataset. There are larger differences between the datasets in some regions, such as the Rocky Mountains of Northwest Wyoming and Southwest Montana, where the Landsat dataset indicates 54% less PISC area. Analysis of Landsat scenes from 1987–1988 and 2008–2010 for three regions using a more conventional, semi-automated approach indicates substantial decreases in glaciers and perennial snow cover that correlate with differences between PISC mapped by the USGS DRG dataset and the automated Landsat-derived dataset. This suggests that most of the differences in PISC between the USGS DRG and the Landsat-derived dataset can be attributed to decreases in PISC, as opposed to differences between mapping techniques. While the dataset produced by the automated Landsat mapping approach is not designed to serve as a conventional glacier inventory that provides glacier outlines and attribute information, it allows for an updated estimate of PISC for the conterminous U.S. as well as for smaller regions. Additionally, the new dataset highlights areas where decreases in PISC have been most significant over the past 25–50 years.

  6. Combination of Landsat and Sentinel-2 MSI data for initial assessing of burn severity

    Science.gov (United States)

    Quintano, C.; Fernández-Manso, A.; Fernández-Manso, O.

    2018-02-01

    Nowadays Earth observation satellites, in particular Landsat, provide a valuable help to forest managers in post-fire operations; being the base of post-fire damage maps that enable to analyze fire impacts and to develop vegetation recovery plans. Sentinel-2A MultiSpectral Instrument (MSI) records data in similar spectral wavelengths that Landsat 8 Operational Land Imager (OLI), and has higher spatial and temporal resolutions. This work compares two types of satellite-based maps for evaluating fire damage in a large wildfire (around 8000 ha) located in Sierra de Gata (central-western Spain) on 6-11 August 2015. 1) burn severity maps based exclusively on Landsat data; specifically, on differenced Normalized Burn Ratio (dNBR) and on its relative versions (Relative dNBR, RdNBR, and Relativized Burn Ratio, RBR) and 2) burn severity maps based on the same indexes but combining pre-fire data from Landsat 8 OLI with post-fire data from Sentinel-2A MSI data. Combination of both Landsat and Sentinel-2 data might reduce the time elapsed since forest fire to the availability of an initial fire damage map. Interpretation of ortho-photograph Pléiades 1 B data (1:10,000) provided us the ground reference data to measure the accuracy of both burn severity maps. Results showed that Landsat based burn severity maps presented an adequate assessment of the damage grade (κ statistic = 0.80) and its spatial distribution in wildfire emergency response. Further using both Landsat and Sentinel-2 MSI data the accuracy of burn severity maps, though slightly lower (κ statistic = 0.70) showed an adequate level for be used by forest managers.

  7. Avaliação da qualidade de sementes de girassol por meio de análise de imagens

    OpenAIRE

    Cartiane Rubishirley Macêdo da Rocha

    2012-01-01

    A ampliação de novos procedimentos para rápida obtenção de informações precisas sobre o potencial fisiológico é importante para a pesquisa e programas de controle de qualidade de sementes. A análise de imagens de raios X, para avaliar a qualidade de sementes, é um método de precisão que possibilita examinar, com detalhes, a região danificada ou alterada, sua localização e extensão. Por ser um método não destrutivo, as sementes em análise podem ser submetidas a testes fisiológicos e, desta for...

  8. Imagens técnicas e distopias. A sociedade programada no pensamento de Vilém Flusser

    Directory of Open Access Journals (Sweden)

    Milton Pelegrini

    2010-06-01

    Full Text Available O presente artigo pretende encontrar um viés condutor que permita observar, no pensamento de Vilém Flusser, como as imagens técnicas, ou tecnoimagens, possuem uma intenção programática de levar a cabo a lógica do capital para articular consensos sociais sobre seus consumos. Como conseqüência pode-se perceber o desmantelamento de uma utopia e o surgimento de uma nova maneira de se vincular com o futuro, agora de um modo diferente, distópico, com base na programação totalitária das sociedades pelas exposições maciças de tecnoimagens.

  9. La imagen del personaje homosexual masculino como protagonista en la cinematografía española

    OpenAIRE

    Alfeo Álvarez, Juan Carlos

    1997-01-01

    El objetivo de la investigación es analizar la imagen cinematográfica de la cuestión homosexual, tomando en cuenta las películas producidas en España entre 1961 y 1996 cuyos relatos estén protagonizados por personajes homosexuales. Mediante un modelo de análisis basado en el método de cuantificación de rasgos, se ha estudiado la representación de parámetros tales como edad, nivel cultural y socieconómico, grado de visibilidad social, grado de aceptación en función de los ámbitos (personal, fa...

  10. Imagen y palabra en la evangelización y catequesis de la Ruta de La Plata. Potosi–Arica

    Directory of Open Access Journals (Sweden)

    Guzmán, Fernando

    2014-12-01

    Full Text Available The following article intends to recreate, by means of studying a number of wall paintings in the churches located in the “Ruta de la Plata” (Silver route trade between Potosi mining village and Arica's port, analyzing the catechisms of the Third Council of Lima (1584, the way in which the Christianization and catechesis process took place in these locations. Based in the trilogy listened word, memorized formula, and contemplated-remembered image of the religious paintings, the research purpose is focused on detecting how that particular articulation modified or determined the remembrance that the observers made of them. In addition, it will deepen in the way the paintings were observed, and in the images that were created in memory, figuring how they gave life to a particular Christian experience for the inhabitants of this territory.El presente trabajo se propone reconstruir, a través del estudio de las pinturas murales en las iglesias ubicadas en la Ruta de la Plata y del análisis de los catecismos del Tercer Concilio limense, la forma como podría haber operado el método de evangelización y catequesis fundado en la trilogía: palabra escuchada, fórmula memorizada, imagen contemplada y recordada. Buscando proponer de qué manera esa articulación modificaba o determinaba la observación o la recordación de las pinturas religiosas o, en la dirección contraria, de qué forma las pinturas observadas o la imagen de ellas en la memoria daban forma a la vida cristiana de quienes habitaban este territorio.

  11. Retórica Das Imagens Na Construção Do Discurso Anti-homofóbico

    Directory of Open Access Journals (Sweden)

    Daniel Mazzaro Vilar de Almeida

    2016-07-01

    Full Text Available Este trabalho consiste em analisar como o imaginário da tolerância é construído em imagens contidas em propagandas de prevenção à homofobia no Brasil e em outros países latino-americanos na contemporaneidade. O corpus é formado por propagandas veiculadas em redes sociais e o foco de nossa análise é o papel dos efeitos patêmicos na construção dos ethé de vítima. Para tanto, nos valemos das contribuições de Mendes (2010, 2012, 2013 sobre a análise integrada de imagens e de Wieviorka (2005 sobre a compreensão moderna da "vítima". Recorremos também a Butler (2010, segundo a qual a linguagem projeta feixes de realidade sobre o corpo social, marcando-o e moldando-o violentamente com base em um esquema heterossexual. Observamos, no corpus, a ocorrência de efeitos patêmicos ligados à empatia e ao medo [da violência], em uma escala que vai da repugnância ao terror. A finalidade de tais efeitos visados é justamente tentar sensibilizar os cidadãos para a causa do combate à homofobia. No que tange ao ethos, percebemos a projeção de uma imagem de si, inicialmente, como vítima, mas que se transforma em uma imagem de ator social capaz de lutar pelos seus direitos pelo fato de estar em uma propaganda de combate à homofobia.

  12. Entre a Arte e a Terapia: as “imagens do inconsciente” e o surgimento de novos artistas

    Directory of Open Access Journals (Sweden)

    Magdalena Sophia Ribeiro de Toledo

    2016-11-01

    Full Text Available Em 1946, a psiquiatra Nise da Silveira e o artista plástico Almir Mavignier trabalharam na criação de um ateliê de pintura no Setor de Terapêutica Ocupacional do Centro Psiquiátrico Pedro II, no Rio de Janeiro. Para a psiquiatra, as obras produzidas no ateliê possibilitariam revelar os estados psíquicos dos indivíduos portadores de transtornos mentais, seguindo a linha de análise junguiana. Deste modo, as imagens eram entendidas como um importante veículo de expressão em estados esquizofrênicos, nos quais a linguagem verbal se mostraria limitada e inadequada, e o ato de pintar, possuidor de efeitos terapêuticos. Tais obras constituíam, nas palavras de Nise da Silveira, “documentos plásticos” que deveriam ser devidamente catalogados e pesquisados, motivo de criação, em 1952, do Museu de Imagens do Inconsciente. Em seus primeiros anos, o ateliê foi frequentado por uma nova geração de artistas que, mais tarde, formaria o movimento concreto carioca. Com isso, as obras produzidas no ateliê pelos internos ganharam uma visibilidade fora dos muros da instituição psiquiátrica, possibilitando que a muitas delas fosse atribuído, por parte da crítica especializada,sobretudo Mário Pedrosa, o estatuto de “obras de arte”, o que, conjuntamente, contribuiu para o “surgimento” de novos artistas.

  13. Cloud detection algorithm comparison and validation for operational Landsat data products

    Science.gov (United States)

    Foga, Steven Curtis; Scaramuzza, Pat; Guo, Song; Zhu, Zhe; Dilley, Ronald; Beckmann, Tim; Schmidt, Gail L.; Dwyer, John L.; Hughes, MJ; Laue, Brady

    2017-01-01

    Clouds are a pervasive and unavoidable issue in satellite-borne optical imagery. Accurate, well-documented, and automated cloud detection algorithms are necessary to effectively leverage large collections of remotely sensed data. The Landsat project is uniquely suited for comparative validation of cloud assessment algorithms because the modular architecture of the Landsat ground system allows for quick evaluation of new code, and because Landsat has the most comprehensive manual truth masks of any current satellite data archive. Currently, the Landsat Level-1 Product Generation System (LPGS) uses separate algorithms for determining clouds, cirrus clouds, and snow and/or ice probability on a per-pixel basis. With more bands onboard the Landsat 8 Operational Land Imager (OLI)/Thermal Infrared Sensor (TIRS) satellite, and a greater number of cloud masking algorithms, the U.S. Geological Survey (USGS) is replacing the current cloud masking workflow with a more robust algorithm that is capable of working across multiple Landsat sensors with minimal modification. Because of the inherent error from stray light and intermittent data availability of TIRS, these algorithms need to operate both with and without thermal data. In this study, we created a workflow to evaluate cloud and cloud shadow masking algorithms using cloud validation masks manually derived from both Landsat 7 Enhanced Thematic Mapper Plus (ETM +) and Landsat 8 OLI/TIRS data. We created a new validation dataset consisting of 96 Landsat 8 scenes, representing different biomes and proportions of cloud cover. We evaluated algorithm performance by overall accuracy, omission error, and commission error for both cloud and cloud shadow. We found that CFMask, C code based on the Function of Mask (Fmask) algorithm, and its confidence bands have the best overall accuracy among the many algorithms tested using our validation data. The Artificial Thermal-Automated Cloud Cover Algorithm (AT-ACCA) is the most accurate

  14. Updating stand-level forest inventories using airborne laser scanning and Landsat time series data

    Science.gov (United States)

    Bolton, Douglas K.; White, Joanne C.; Wulder, Michael A.; Coops, Nicholas C.; Hermosilla, Txomin; Yuan, Xiaoping

    2018-04-01

    Vertical forest structure can be mapped over large areas by combining samples of airborne laser scanning (ALS) data with wall-to-wall spatial data, such as Landsat imagery. Here, we use samples of ALS data and Landsat time-series metrics to produce estimates of top height, basal area, and net stem volume for two timber supply areas near Kamloops, British Columbia, Canada, using an imputation approach. Both single-year and time series metrics were calculated from annual, gap-free Landsat reflectance composites representing 1984-2014. Metrics included long-term means of vegetation indices, as well as measures of the variance and slope of the indices through time. Terrain metrics, generated from a 30 m digital elevation model, were also included as predictors. We found that imputation models improved with the inclusion of Landsat time series metrics when compared to single-year Landsat metrics (relative RMSE decreased from 22.8% to 16.5% for top height, from 32.1% to 23.3% for basal area, and from 45.6% to 34.1% for net stem volume). Landsat metrics that characterized 30-years of stand history resulted in more accurate models (for all three structural attributes) than Landsat metrics that characterized only the most recent 10 or 20 years of stand history. To test model transferability, we compared imputed attributes against ALS-based estimates in nearby forest blocks (>150,000 ha) that were not included in model training or testing. Landsat-imputed attributes correlated strongly to ALS-based estimates in these blocks (R2 = 0.62 and relative RMSE = 13.1% for top height, R2 = 0.75 and relative RMSE = 17.8% for basal area, and R2 = 0.67 and relative RMSE = 26.5% for net stem volume), indicating model transferability. These findings suggest that in areas containing spatially-limited ALS data acquisitions, imputation models, and Landsat time series and terrain metrics can be effectively used to produce wall-to-wall estimates of key inventory attributes, providing an

  15. Fusion of MODIS and landsat-8 surface temperature images: a new approach.

    Science.gov (United States)

    Hazaymeh, Khaled; Hassan, Quazi K

    2015-01-01

    Here, our objective was to develop a spatio-temporal image fusion model (STI-FM) for enhancing temporal resolution of Landsat-8 land surface temperature (LST) images by fusing LST images acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS); and implement the developed algorithm over a heterogeneous semi-arid study area in Jordan, Middle East. The STI-FM technique consisted of two major components: (i) establishing a linear relationship between two consecutive MODIS 8-day composite LST images acquired at time 1 and time 2; and (ii) utilizing the above mentioned relationship as a function of a Landsat-8 LST image acquired at time 1 in order to predict a synthetic Landsat-8 LST image at time 2. It revealed that strong linear relationships (i.e., r2, slopes, and intercepts were in the range 0.93-0.94, 0.94-0.99; and 2.97-20.07) existed between the two consecutive MODIS LST images. We evaluated the synthetic LST images qualitatively and found high visual agreements with the actual Landsat-8 LST images. In addition, we conducted quantitative evaluations of these synthetic images; and found strong agreements with the actual Landsat-8 LST images. For example, r2, root mean square error (RMSE), and absolute average difference (AAD)-values were in the ranges 084-0.90, 0.061-0.080, and 0.003-0.004, respectively.

  16. a Comparative Analysis of Spatiotemporal Data Fusion Models for Landsat and Modis Data

    Science.gov (United States)

    Hazaymeh, K.; Almagbile, A.

    2018-04-01

    In this study, three documented spatiotemporal data fusion models were applied to Landsat-7 and MODIS surface reflectance, and NDVI. The algorithms included the spatial and temporal adaptive reflectance fusion model (STARFM), sparse representation based on a spatiotemporal reflectance fusion model (SPSTFM), and spatiotemporal image-fusion model (STI-FM). The objectives of this study were to (i) compare the performance of these three fusion models using a one Landsat-MODIS spectral reflectance image pairs using time-series datasets from the Coleambally irrigation area in Australia, and (ii) quantitatively evaluate the accuracy of the synthetic images generated from each fusion model using statistical measurements. Results showed that the three fusion models predicted the synthetic Landsat-7 image with adequate agreements. The STI-FM produced more accurate reconstructions of both Landsat-7 spectral bands and NDVI. Furthermore, it produced surface reflectance images having the highest correlation with the actual Landsat-7 images. This study indicated that STI-FM would be more suitable for spatiotemporal data fusion applications such as vegetation monitoring, drought monitoring, and evapotranspiration.

  17. Burned area detection based on Landsat time series in savannas of southern Burkina Faso

    Science.gov (United States)

    Liu, Jinxiu; Heiskanen, Janne; Maeda, Eduardo Eiji; Pellikka, Petri K. E.

    2018-02-01

    West African savannas are subject to regular fires, which have impacts on vegetation structure, biodiversity and carbon balance. An efficient and accurate mapping of burned area associated with seasonal fires can greatly benefit decision making in land management. Since coarse resolution burned area products cannot meet the accuracy needed for fire management and climate modelling at local scales, the medium resolution Landsat data is a promising alternative for local scale studies. In this study, we developed an algorithm for continuous monitoring of annual burned areas using Landsat time series. The algorithm is based on burned pixel detection using harmonic model fitting with Landsat time series and breakpoint identification in the time series data. This approach was tested in a savanna area in southern Burkina Faso using 281 images acquired between October 2000 and April 2016. An overall accuracy of 79.2% was obtained with balanced omission and commission errors. This represents a significant improvement in comparison with MODIS burned area product (67.6%), which had more omission errors than commission errors, indicating underestimation of the total burned area. By observing the spatial distribution of burned areas, we found that the Landsat based method misclassified cropland and cloud shadows as burned areas due to the similar spectral response, and MODIS burned area product omitted small and fragmented burned areas. The proposed algorithm is flexible and robust against decreased data availability caused by clouds and Landsat 7 missing lines, therefore having a high potential for being applied in other landscapes in future studies.

  18. LANDSAT 8 MULTISPECTRAL AND PANSHARPENED IMAGERY PROCESSING ON THE STUDY OF CIVIL ENGINEERING ISSUES

    Directory of Open Access Journals (Sweden)

    M. A. Lazaridou

    2016-06-01

    Full Text Available Scientific and professional interests of civil engineering mainly include structures, hydraulics, geotechnical engineering, environment, and transportation issues. Topics included in the context of the above may concern urban environment issues, urban planning, hydrological modelling, study of hazards and road construction. Land cover information contributes significantly on the study of the above subjects. Land cover information can be acquired effectively by visual image interpretation of satellite imagery or after applying enhancement routines and also by imagery classification. The Landsat Data Continuity Mission (LDCM – Landsat 8 is the latest satellite in Landsat series, launched in February 2013. Landsat 8 medium spatial resolution multispectral imagery presents particular interest in extracting land cover, because of the fine spectral resolution, the radiometric quantization of 12bits, the capability of merging the high resolution panchromatic band of 15 meters with multispectral imagery of 30 meters as well as the policy of free data. In this paper, Landsat 8 multispectral and panchromatic imageries are being used, concerning surroundings of a lake in north-western Greece. Land cover information is extracted, using suitable digital image processing software. The rich spectral context of the multispectral image is combined with the high spatial resolution of the panchromatic image, applying image fusion – pansharpening, facilitating in this way visual image interpretation to delineate land cover. Further processing concerns supervised image classification. The classification of pansharpened image preceded multispectral image classification. Corresponding comparative considerations are also presented.

  19. Enhancing a Simple MODIS Cloud Mask Algorithm for the Landsat Data Continuity Mission

    Science.gov (United States)

    Wilson, Michael J.; Oreopoulos, Lazarous

    2011-01-01

    The presence of clouds in images acquired by the Landsat series of satellites is usually an undesirable, but generally unavoidable fact. With the emphasis of the program being on land imaging, the suspended liquid/ice particles of which clouds are made of fully or partially obscure the desired observational target. Knowing the amount and location of clouds in a Landsat scene is therefore valuable information for scene selection, for making clear-sky composites from multiple scenes, and for scheduling future acquisitions. The two instruments in the upcoming Landsat Data Continuity Mission (LDCM) will include new channels that will enhance our ability to detect high clouds which are often also thin in the sense that a large fraction of solar radiation can pass through them. This work studies the potential impact of these new channels on enhancing LDCM's cloud detection capabilities compared to previous Landsat missions. We revisit a previously published scheme for cloud detection and add new tests to capture more of the thin clouds that are harder to detect with the more limited arsenal channels. Since there are no Landsat data yet that include the new LDCM channels, we resort to data from another instrument, MODIS, which has these bands, as well as the other bands of LDCM, to test the capabilities of our new algorithm. By comparing our revised scheme's performance against the performance of the official MODIS cloud detection scheme, we conclude that the new scheme performs better than the earlier scheme which was not very good at thin cloud detection.

  20. Landsat 8 Multispectral and Pansharpened Imagery Processing on the Study of Civil Engineering Issues

    Science.gov (United States)

    Lazaridou, M. A.; Karagianni, A. Ch.

    2016-06-01

    Scientific and professional interests of civil engineering mainly include structures, hydraulics, geotechnical engineering, environment, and transportation issues. Topics included in the context of the above may concern urban environment issues, urban planning, hydrological modelling, study of hazards and road construction. Land cover information contributes significantly on the study of the above subjects. Land cover information can be acquired effectively by visual image interpretation of satellite imagery or after applying enhancement routines and also by imagery classification. The Landsat Data Continuity Mission (LDCM - Landsat 8) is the latest satellite in Landsat series, launched in February 2013. Landsat 8 medium spatial resolution multispectral imagery presents particular interest in extracting land cover, because of the fine spectral resolution, the radiometric quantization of 12bits, the capability of merging the high resolution panchromatic band of 15 meters with multispectral imagery of 30 meters as well as the policy of free data. In this paper, Landsat 8 multispectral and panchromatic imageries are being used, concerning surroundings of a lake in north-western Greece. Land cover information is extracted, using suitable digital image processing software. The rich spectral context of the multispectral image is combined with the high spatial resolution of the panchromatic image, applying image fusion - pansharpening, facilitating in this way visual image interpretation to delineate land cover. Further processing concerns supervised image classification. The classification of pansharpened image preceded multispectral image classification. Corresponding comparative considerations are also presented.

  1. Change detection using landsat time series: A review of frequencies, preprocessing, algorithms, and applications

    Science.gov (United States)

    Zhu, Zhe

    2017-08-01

    The free and open access to all archived Landsat images in 2008 has completely changed the way of using Landsat data. Many novel change detection algorithms based on Landsat time series have been developed We present a comprehensive review of four important aspects of change detection studies based on Landsat time series, including frequencies, preprocessing, algorithms, and applications. We observed the trend that the more recent the study, the higher the frequency of Landsat time series used. We reviewed a series of image preprocessing steps, including atmospheric correction, cloud and cloud shadow detection, and composite/fusion/metrics techniques. We divided all change detection algorithms into six categories, including thresholding, differencing, segmentation, trajectory classification, statistical boundary, and regression. Within each category, six major characteristics of different algorithms, such as frequency, change index, univariate/multivariate, online/offline, abrupt/gradual change, and sub-pixel/pixel/spatial were analyzed. Moreover, some of the widely-used change detection algorithms were also discussed. Finally, we reviewed different change detection applications by dividing these applications into two categories, change target and change agent detection.

  2. “Dime cómo vendes y te diré quién eres”: actividades de imagen e identidad en la publicidad de Yoigo

    Directory of Open Access Journals (Sweden)

    Vizcaíno María José García

    2016-11-01

    Full Text Available Este trabajo analiza los anuncios de televisión y prensa de la compañía española de telefonía móvil Yoigo para explorar cómo la publicidad usa la apelación emocional para persuadir al consumidor a adquirir un servicio. El marco teórico se basa, por una parte, en el concepto de efecto social del acto comunicativo (Bravo, 2008. The implications of studying politeness in Spanish-speaking contexts: a discussion. Pragmatics, 18 (4: 577–603 y el de actividad de imagen (Hernández Flores, 2013. Actividad de imagen: caracterización y tipología en la interacción comunicativa. Pragmática Sociocultural, 1(2: 175–198, entendiendo la imagen social desde las categorías básicas de autonomía y afiliación (Bravo, 1999. ¿Imagen “positiva” vs. imagen “negativa”?: Pragmática sociocultural y componentes de face. Oralia, 2: 155–184 con sus manifestaciones grupal e individual (Bravo, 1999; 2002. Actos asertivos y cortesía: Imagen del rol en el discurso de académicos argentinos. En D. Bravo y M. E. Placencia (Eds., Actos de habla y cortesía en el español (pp. 141–174. Munich: Lincom Europa. Por otro lado, se parte de las propuestas de identidad de Spencer-Oatey (2007, 2010. Theories of identity and the analysis of face. Journal of Pragmatics, 39, 639–656; Face, identity and interactional goals. En F. Bargiela-Chiappini y M. Haugh (eds., Face, Communication and Social Interaction (pp. 137–154 y los tipos de valores centrales e individuales de los que se nutren tanto la imagen social como la identidad (Schwartz y Bardi, 2001. Value hierarquies across cultures. Take a similarities perspective. Journal of Cross-Cultural Psychology, 32(3, 268-290. Los resultados de los análisis demuestran que en los anuncios de Yoigo los valores de honestidad y originalidad están presentes en las estrategias comunicativas elegidas, lo que supone una serie de actividades de imagen (del tipo de autoimagen, cortesía y descortesía donde la afiliaci

  3. A one year Landsat 8 conterminous United States study of spatial and temporal patterns of cirrus and non-cirrus clouds and implications for the long term Landsat archive.

    Science.gov (United States)

    Kovalskyy, V.; Roy, D. P.

    2014-12-01

    The successful February 2013 launch of the Landsat 8 satellite is continuing the 40+ year legacy of the Landsat mission. The payload includes the Operational Land Imager (OLI) that has a new 1370 mm band designed to monitor cirrus clouds and the Thermal Infrared Sensor (TIRS) that together provide 30m low, medium and high confidence cloud detections and 30m low and high confidence cirrus cloud detections. A year of Landsat 8 data over the Conterminous United States (CONUS), composed of 11,296 acquisitions, was analyzed comparing the spatial and temporal incidence of these cloud and cirrus states. This revealed (i) 36.5% of observations were detected with high confidence cloud with spatio-temporal patterns similar to those observed by previous Landsat 7 cloud analyses, (ii) 29.2% were high confidence cirrus, (iii) 20.9% were both high confidence cloud and high confidence cirrus, (iv) 8.3% were detected as high confidence cirrus but not as high confidence cloud. The results illustrate the value of the cirrus band for improved Landsat 8 terrestrial monitoring but imply that the historical CONUS Landsat archive has a similar 8% of undetected cirrus contaminated pixels. The implications for long term Landsat time series records, including the global Web Enabled Landsat Data (WELD) product record, are discussed.

  4. MODELLING BIOPHYSICAL PARAMETERS OF MAIZE USING LANDSAT 8 TIME SERIES

    Directory of Open Access Journals (Sweden)

    T. Dahms

    2016-06-01

    Full Text Available Open and free access to multi-frequent high-resolution data (e.g. Sentinel – 2 will fortify agricultural applications based on satellite data. The temporal and spatial resolution of these remote sensing datasets directly affects the applicability of remote sensing methods, for instance a robust retrieving of biophysical parameters over the entire growing season with very high geometric resolution. In this study we use machine learning methods to predict biophysical parameters, namely the fraction of absorbed photosynthetic radiation (FPAR, the leaf area index (LAI and the chlorophyll content, from high resolution remote sensing. 30 Landsat 8 OLI scenes were available in our study region in Mecklenburg-Western Pomerania, Germany. In-situ data were weekly to bi-weekly collected on 18 maize plots throughout the summer season 2015. The study aims at an optimized prediction of biophysical parameters and the identification of the best explaining spectral bands and vegetation indices. For this purpose, we used the entire in-situ dataset from 24.03.2015 to 15.10.2015. Random forest and conditional inference forests were used because of their explicit strong exploratory and predictive character. Variable importance measures allowed for analysing the relation between the biophysical parameters with respect to the spectral response, and the performance of the two approaches over the plant stock evolvement. Classical random forest regression outreached the performance of conditional inference forests, in particular when modelling the biophysical parameters over the entire growing period. For example, modelling biophysical parameters of maize for the entire vegetation period using random forests yielded: FPAR: R² = 0.85; RMSE = 0.11; LAI: R² = 0.64; RMSE = 0.9 and chlorophyll content (SPAD: R² = 0.80; RMSE=4.9. Our results demonstrate the great potential in using machine-learning methods for the interpretation of long-term multi-frequent remote sensing

  5. Modelling Biophysical Parameters of Maize Using Landsat 8 Time Series

    Science.gov (United States)

    Dahms, Thorsten; Seissiger, Sylvia; Conrad, Christopher; Borg, Erik

    2016-06-01

    Open and free access to multi-frequent high-resolution data (e.g. Sentinel - 2) will fortify agricultural applications based on satellite data. The temporal and spatial resolution of these remote sensing datasets directly affects the applicability of remote sensing methods, for instance a robust retrieving of biophysical parameters over the entire growing season with very high geometric resolution. In this study we use machine learning methods to predict biophysical parameters, namely the fraction of absorbed photosynthetic radiation (FPAR), the leaf area index (LAI) and the chlorophyll content, from high resolution remote sensing. 30 Landsat 8 OLI scenes were available in our study region in Mecklenburg-Western Pomerania, Germany. In-situ data were weekly to bi-weekly collected on 18 maize plots throughout the summer season 2015. The study aims at an optimized prediction of biophysical parameters and the identification of the best explaining spectral bands and vegetation indices. For this purpose, we used the entire in-situ dataset from 24.03.2015 to 15.10.2015. Random forest and conditional inference forests were used because of their explicit strong exploratory and predictive character. Variable importance measures allowed for analysing the relation between the biophysical parameters with respect to the spectral response, and the performance of the two approaches over the plant stock evolvement. Classical random forest regression outreached the performance of conditional inference forests, in particular when modelling the biophysical parameters over the entire growing period. For example, modelling biophysical parameters of maize for the entire vegetation period using random forests yielded: FPAR: R² = 0.85; RMSE = 0.11; LAI: R² = 0.64; RMSE = 0.9 and chlorophyll content (SPAD): R² = 0.80; RMSE=4.9. Our results demonstrate the great potential in using machine-learning methods for the interpretation of long-term multi-frequent remote sensing datasets to model

  6. Oil exploration in Central Arabian Arch using Landsat images

    Energy Technology Data Exchange (ETDEWEB)

    Sabins, F.F. (Remote Sensing Engerprises, Inc., Fullerton, CA (United States))

    1996-01-01

    Beginning in 1988, the Chevron Remote Sensing Research Group and Aramco digitally processed and interpreted seven Landsat thematic mapper images of the Central Arabian Arch for two purposes: 1. Map geology at 1:250,000 scale; 2. Identify anomalies that may be surface expression of structural traps. The well-exposed outcrops are predominantly marine strata of Mesozoic age with regional dips to east and southeast at less than 2[degrees]. This structural setting lacks the patterns of arcuate and offset beds that characterize folds and faults in more strongly deformed terrains. Therefore we developed a model to predict the image expression of structures in this homoclinal terrain. We based the model on oil fields in the Arabian Gulf region that are drape anticlines overlying high-angle faults that offset basement rocks and Palecizoic strata. The anticlines grade upward into structural terraces caused by flattening of the regional dip. Erosion of the terraces produces subtle topographic and stratigraphic anomalies that are recognizable on the images. The model was used to interpret a number of image anomalies. We field-checked the anomalies and eliminated a few. Aramco then acquired seismic data for several of the more promising anomalies that confirmed the presence of subsurface structure. Drilling resulted in discovery of Raghib and Dilam fields that produce from the Unayzah Sandstone (Permian). Initial production in the discovery and development wells ranges from 3000 to 4300 BOPD with gravity of 44 to 46[degrees] API. The source of this high-quality oil is the Qusaiba Shale (Silurian). The new discoveries are approximately 100 km from the nearest fields. Less than two years elapsed from beginning of digital image processing to completion of the discovery wells.

  7. Oil exploration in Central Arabian Arch using Landsat images

    Energy Technology Data Exchange (ETDEWEB)

    Sabins, F.F. [Remote Sensing Engerprises, Inc., Fullerton, CA (United States)

    1996-12-31

    Beginning in 1988, the Chevron Remote Sensing Research Group and Aramco digitally processed and interpreted seven Landsat thematic mapper images of the Central Arabian Arch for two purposes: 1. Map geology at 1:250,000 scale; 2. Identify anomalies that may be surface expression of structural traps. The well-exposed outcrops are predominantly marine strata of Mesozoic age with regional dips to east and southeast at less than 2{degrees}. This structural setting lacks the patterns of arcuate and offset beds that characterize folds and faults in more strongly deformed terrains. Therefore we developed a model to predict the image expression of structures in this homoclinal terrain. We based the model on oil fields in the Arabian Gulf region that are drape anticlines overlying high-angle faults that offset basement rocks and Palecizoic strata. The anticlines grade upward into structural terraces caused by flattening of the regional dip. Erosion of the terraces produces subtle topographic and stratigraphic anomalies that are recognizable on the images. The model was used to interpret a number of image anomalies. We field-checked the anomalies and eliminated a few. Aramco then acquired seismic data for several of the more promising anomalies that confirmed the presence of subsurface structure. Drilling resulted in discovery of Raghib and Dilam fields that produce from the Unayzah Sandstone (Permian). Initial production in the discovery and development wells ranges from 3000 to 4300 BOPD with gravity of 44 to 46{degrees} API. The source of this high-quality oil is the Qusaiba Shale (Silurian). The new discoveries are approximately 100 km from the nearest fields. Less than two years elapsed from beginning of digital image processing to completion of the discovery wells.

  8. Análise de Imagens Médicas através de Sistemas Computacionais Inteligentes para Apoio ao Diagnóstico Clínico

    Directory of Open Access Journals (Sweden)

    Anderson Alvarenga de Moura Meneses

    2015-07-01

    Full Text Available Histomorfometria óssea é uma importante análise na prevenção e tratamento de câncer e osteoporose,fornecendo informação quantitativa para diagnóstico clínico. A MicrotomografiaComputadorizada por Raios X é uma técnica de imagens não-destrutiva e não-invasiva comuma alta resolução que permite imagens ampliadas. Na análise histomorfométrica de tais imagens,é possível usar técnicas de tratamento tais como filtros morfológicos e binarização. Taistécnicas, no entanto, podem causar perda de informação relevante para a quantificação damassa óssea. Neste trabalho é descrita a aplicação de Redes Neurais Artificiais (RNA parareconhecimento de tecido ósseo como parte de uma pesquisa sobre análise histomorfométricaem imagens cuja aquisição foi feita no Laboratório ELETTRA, em Trieste, Itália, na linha depesquisa SYRMEP (Synchrotron Radiation for Medical Physics – Radiação Síncrotron paraFísica Médica. Nestes testes iniciais, uma RNA Perceptron Multi-Camadas (PMC Feed-Forward (FF com algoritmo de aprendizagem de Retro-Propagação de Erro foi utilizada natarefa de reconhecimento. A qualidade dos resultados na tarefa da classificação de subimagensfoi verificada através de Curvas ROC (Receiver Operating Characteristic. Para este tipo deRNA obtivemos uma area sob a curva de 1,000, o que significa que a arquitetura e o treinamentoda RNA se mostraram adequados para a tarefa de reconhecimento de tecido ósseo. As imagensobtidas também são mostradas neste trabalho. Os resultados dos testes demonstraram aviabilidade de aplicação metodológica de Redes Neurais Artificiais e sua adequação às característicasdas imagens obtidas por Microtomografia Computadorizada por Raios X, para evitar perdas ocasionadas por outras técnicas de manipulação e tratamento de imagens. Tambémapresentamos uma breve descrição das principais tecnologias de implementação do projeto.

  9. Percepción de la imagen corporal como aproximación cualitativa al estado de nutrición

    Directory of Open Access Journals (Sweden)

    Madrigal-Fritsch Herlinda

    1999-01-01

    Full Text Available OBJETIVO: Comparar la percepción de la imagen corporal con el índice de masa corporal (IMC calculado a partir del peso y la talla declarados por los sujetos y valorar su capacidad para clasificar el estado de nutrición. MATERIAL Y MÉTODOS: Se eligió una muestra representativa de la población de España, integrada por 517 hombres y 483 mujeres mayores de 15 años. Las variables fueron sexo, edad, nivel educativo, IMC e imagen corporal percibida. Las diferencias entre grupos se estimaron con la prueba de ji². La capacidad de clasificación de la imagen corporal se comparó con el IMC empleando la sensibilidad y la especificidad. RESULTADOS: El estado nutricional para ambos indicadores mostró mayor sobrepeso en hombres y mayor obesidad en mujeres. Se observó que el sobrepeso y la obesidad se incrementan conforme aumenta la edad, y con mayor educación disminuyen. La percepción de la imagen corporal fue distinta entre sexos, así como por edad y nivel educativo (p<0.01. La comparación entre el IMC y la imagen corporal notificó valores superiores a 0.90 para sensibilidad y especificidad, así como para los valores predictivos positivos y negativos en sujetos que presentaron un estado nutricional que alcanzaba los rangos extremos. La precisión fue mayor para la sensibilidad que para la especificidad. La capacidad de clasificación fue mejor en mujeres que en hombres. La correlación de Spearman fue mayor en mujeres que en hombres (p<0.001 y la concordancia W de Kendall notificó valores altos para ambos sexos. CONCLUSIONES: La percepción de la imagen corporal permitió identificar a los sujetos que presentaban nutrición normal y deficiente o excesiva; por tal motivo, este indicador puede resultar útil en estudios epidemiológicos, aunque tiene algunas limitaciones para diagnósticos individuales.

  10. Application of integrated Landsat, geochemical and geophysical data in mineral exploration

    International Nuclear Information System (INIS)

    Conradsen, K.; Nilsson, G.; Thyrsted, T.; Gronlands Geologiske Undersogelse, Copenhagen, Denmark)

    1985-01-01

    In South Greenland (20000 sq. km) a remote sensing investigation is executed in connection with uranium exploration. The investigation includes analysis of Landsat data, conversion of geological, geochemical and geophysical data to image format compatible with Landsat images, and analysis of the total set of integrated data. The available geochemical data consisted of samples from 2000 sites, analyzed for U, K, Rb, Sr, Nb, Ga, Y, and Fe. The geophysical data comprised airborne gamma-spectrometric measurements and aeromagnetic data. The interpolation routines consisted of a kriging procedure for the geochemical data and a minimum curvature routine for the geophysical data. The analysis of the integrated data set is at a preliminary stage. As example a composite image showing Landsat channel 7, magnetic values, and Fe values as respectively intensity, hue and saturation is analyzed. It reveals alkaline intrusions and basaltic layers as anomalies while other anomalies cannot be accounted for on the basis of the present geological knowledge. 12 references

  11. REGIONAL GEOLGICAL MAPPING IN TROPICAL ENVIRONMENTS USING LANDSAT TM AND SRTM REMOTE SENSING DATA

    Directory of Open Access Journals (Sweden)

    A. Beiranvand Pour

    2015-10-01

    Full Text Available Landsat Thematic Mapper (TM and Shuttle Radar Topography Mission (SRTM data were used to produce geological maps in tropical environments. Lineament, lithology and landform maps were produced for all states in peninsular Malaysia in this study. Kedah, Perak and Terengganu states have been selected as case studies to demonstrate the results of the data and techniques used. Directional filtering technique was applied to Landsat TM bands 4, 5 and 3 for lineament mapping. The lithology map was produced using Landsat TM bands combination consist of bands 4, 3 and 2. Digital elevation model and landform map were produced using SRTM data in 3 Dimension (3D and 2 Dimension (2D perspective views, respectively. The produced geological maps and the remote sensing data and methods applied in this study are mostly appropriate for hazard risk mapping applications and mineral exploration projects in the peninsular Malaysia and tropical environments.

  12. Applications of LANDSAT data to the integrated economic development of Mindoro, Phillipines

    Science.gov (United States)

    Wagner, T. W.; Fernandez, J. C.

    1977-01-01

    LANDSAT data is seen as providing essential up-to-date resource information for the planning process. LANDSAT data of Mindoro Island in the Philippines was processed to provide thematic maps showing patterns of agriculture, forest cover, terrain, wetlands and water turbidity. A hybrid approach using both supervised and unsupervised classification techniques resulted in 30 different scene classes which were subsequently color-coded and mapped at a scale of 1:250,000. In addition, intensive image analysis is being carried out in evaluating the images. The images, maps, and aerial statistics are being used to provide data to seven technical departments in planning the economic development of Mindoro. Multispectral aircraft imagery was collected to compliment the application of LANDSAT data and validate the classification results.

  13. Application of LANDSAT to the surveillance and control of lake eutrophication in the Great Lakes Basin

    Science.gov (United States)

    Rogers, R. H. (Principal Investigator)

    1975-01-01

    The author has identified the following significant results. Preliminary results in Saginaw Bay show that processed LANDSAT data provides a synoptic view of turbidity and circulation patterns that no degree of ground monitoring can provide. Processed imagery was produced to show nine discrete categories of turbidity, as indicated by nine Secchi depths between 0.3 and 3.3 meters. Analysis of lakes near Madison, Wisconsin show that inland lake water can be categorized by LANDSAT as clear, tannin, algal, and red clay. LANDSAT's capability to inventory watershed land use was throughly demonstrated in the Ohio-Kentucky-Indiana regional planning area. Computer tabulations providing area covered by each of 16 land use categories were rapidly and economically produced for each of the 225 watersheds and nine counties.

  14. The value of earth observations: methods and findings on the value of Landsat imagery

    Science.gov (United States)

    Miller, Holly M.; Serbina, Larisa O.; Richardson, Leslie A.; Ryker, Sarah J.; Newman, Timothy R.

    2016-01-01

    Data from Earth observation systems are used extensively in managing and monitoring natural resources, natural hazards, and the impacts of climate change, but the value of such data can be difficult to estimate, particularly when it is available at no cost. Assessing the socioeconomic and scientific value of these data provides a better understanding of the existing and emerging research, science, and applications related to this information and contributes to the decision making process regarding current and future Earth observation systems. Recent USGS research on Landsat data has advanced the literature in this area by using a variety of methods to estimate value. The results of a 2012 survey of Landsat users, a 2013 requirements assessment, and 2013 case studies of applications of Landsat imagery are discussed.

  15. Use of GLOBE Observations to Derive a Landsat 8 Split Window Algorithm for Urban Heat Island

    Science.gov (United States)

    Fagerstrom, L.; Czajkowski, K. P.

    2017-12-01

    Surface temperature has been studied to investigate the warming of urban climates, also known as urban heat islands, which can impact urban planning, public health, pollution levels, and energy consumption. However, the full potential of remotely sensed images is limited when analyzing land surface temperature due to the daunting task of correcting for atmospheric effects. Landsat 8 has two thermal infrared sensors. With two bands in the infrared region, a split window algorithm (SWA), can be applied to correct for atmospheric effects. This project used in situ surface temperature measurements from NASA's ground observation program, the Global Learning and Observations to Benefit the Environment (GLOBE), to derive the correcting coefficients for use in the SWA. The GLOBE database provided land surface temperature data that coincided with Landsat 8 overpasses. The land surface temperature derived from Landsat 8 SWA can be used to analyze for urban heat island effect.

  16. Improved land use classification from Landsat and Seasat satellite imagery registered to a common map base

    Science.gov (United States)

    Clark, J.

    1981-01-01

    In the case of Landsat Multispectral Scanner System (MSS) data, ambiguities in spectral signature can arise in urban areas. A study was initiated in the belief that Seasat digital SAR could help provide the spectral separability needed for a more accurate urban land use classification. A description is presented of the results of land use classifications performed on Landsat and preprocessed Seasat imagery that were registered to a common map base. The process of registering imagery and training site boundary coordinates to a common map has been reported by Clark (1980). It is found that preprocessed Seasat imagery provides signatures for urban land uses which are spectrally separable from Landsat signatures. This development appears to significantly improve land use classifications in an urban setting for class 12 (Commercial and Services), class 13 (Industrial), and class 14 (Transportation, Communications, and Utilities).

  17. A time-series analysis of flood disaster around Lena river using Landsat TM/ETM+

    Science.gov (United States)

    Sakai, Toru; Hatta, Shigemi; Okumura, Makoto; Takeuchi, Wataru; Hiyama, Tetsuya; Inoue, Gen

    2010-05-01

    Landsat satellite has provided a continuous record of earth observation since 1972, gradually improving sensors (i.e. MSS, TM and ETM+). Already processed archives of Landsat image are now available free of charge from the internet. The Landsat image of 30 m spatial resolution with multiple spectral bands between 450 and 2350 nm is appropriate for detailed mapping of natural resource at wide geographical areas. However, one of the biggest concerns in the use of Landsat image is the uncertainty in the timing of acquisitions. Although detection of land cover change usually requires acquisitions before and after the change, the Landsat image is often unavailable because of the long-term intervals (16 days) and variation in atmosphere. Nearly cloud-free image is acquired at least once per year (total of 22 or 23 scenes per year). Therefore, it may be difficult to acquire appropriate images for monitoring natural disturbances caused at short-term intervals (e.g., flood, forest fire and hurricanes). Our objectives are: (1) to examine whether a time-series of Landsat image is available for monitoring a flood disaster, and (2) to evaluate the impact and timing of the flood disaster around Lena river in Siberia. A set of Landsat TM/ETM+ satellite images was used to enable acquisition of cloud-free image, although Landsat ETM+ images include failure of the Scan Line Corrector (SLC) from May 2003. The overlap area of a time series of 20 Landsat TM/ETM+ images (path 120-122, row 17) from April 2007 to August 2007 was clipped (approximately 33 km × 90 km), and the other area was excluded from the analyses. Image classification was performed on each image separately using an unsupervised ISODATA method, and each Landsat TM/ETM+ image was classified into three land cover types: (1) ice, (2) water, and (3) land. From three land cover types, the area of Lena river was estimated. The area of Lena river dramatically changed after spring breakup. The middle part of Lena river around

  18. BOREAS RSS-15 SIR-C and Landsat TM Biomass and Landcover Maps of the NSA

    Science.gov (United States)

    Hall, Forrest G. (Editor); Nickeson, Jaime (Editor); Ranson, K. Jon

    2000-01-01

    As part of BOREAS, the RSS-15 team conducted an investigation using SIR-C, X-SAR, and Landsat TM data for estimating total above-ground dry biomass for the SSA and NSA modeling grids and component biomass for the SSA. Relationships of backscatter to total biomass and total biomass to foliage, branch, and bole biomass were used to estimate biomass density across the landscape. The procedure involved image classification with SAR and Landsat TM data and development of simple mapping techniques using combinations of SAR channels. For the SSA, the SIR-C data used were acquired on 06-Oct-1994, and the Landsat TM data used were acquired on 02-Sep-1995. The maps of the NSA were developed from SIR-C data acquired on 13-Apr-1994. The data files are available on a CD-ROM (see document number 20010000884), or from the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).

  19. Implementation and testing of WELD and automatic spectral rule-based classifications for Landsat ETM+ in South Africa

    CSIR Research Space (South Africa)

    Wessels, Konrad J

    2013-04-01

    Full Text Available The Web-enabled Landsat Data (WELD) system was successfully installed in South Africa (SA) and used for pre-processing large amounts of Landsat ETM+ data to composited seasonal mosaics. In pursuit of automated land cover mapping, the overall...

  20. Application of two regression-based methods to estimate the effects of partial harvest on forest structure using Landsat data.

    Science.gov (United States)

    S.P. Healey; Z. Yang; W.B. Cohen; D.J. Pierce

    2006-01-01

    Although partial harvests are common in many forest types globally, there has been little assessment of the potential to map the intensity of these harvests using Landsat data. We modeled basal area removal and percentage cover change in a study area in central Washington (northwestern USA) using biennial Landsat imagery and reference data from historical aerial photos...

  1. Application of two regression-based methods to estimate the effects harvest on forest structure using Landsat data

    Science.gov (United States)

    Sean P. Healey; Zhiqiang Yang; Warren B. Cohen; D. John Pierce

    2006-01-01

    Although partial harvests are common in many forest types globally, there has been little assessment of the potential to map the intensity of these harvests using Landsat data. We modeled basal area removal and percent cover change in a study area in central Washington (northwestern USA) using biennial Landsat imagery and reference data from historical aerial photos...

  2. Monitoring water quality in a hypereutrophic reservoir using Landsat ETM+ and OLI sensors: how transferable are the water quality algorithms?

    Science.gov (United States)

    Deutsch, Eliza S; Alameddine, Ibrahim; El-Fadel, Mutasem

    2018-02-15

    The launch of the Landsat 8 in February 2013 extended the life of the Landsat program to over 40 years, increasing the value of using Landsat to monitor long-term changes in the water quality of small lakes and reservoirs, particularly in poorly monitored freshwater systems. Landsat-based water quality hindcasting often incorporate several Landsat sensors in an effort to increase the temporal range of observations; yet the transferability of water quality algorithms across sensors remains poorly examined. In this study, several empirical algorithms were developed to quantify chlorophyll-a, total suspended matter (TSM), and Secchi disk depth (SDD) from surface reflectance measured by Landsat 7 ETM+ and Landsat 8 OLI sensors. Sensor-specific multiple linear regression models were developed by correlating in situ water quality measurements collected from a semi-arid eutrophic reservoir with band ratios from Landsat ETM+ and OLI sensors, along with ancillary data (water temperature and seasonality) representing ecological patterns in algae growth. Overall, ETM+-based models outperformed (adjusted R 2 chlorophyll-a = 0.70, TSM = 0.81, SDD = 0.81) their OLI counterparts (adjusted R 2 chlorophyll-a = 0.50, TSM = 0.58, SDD = 0.63). Inter-sensor differences were most apparent for algorithms utilizing the Blue spectral band. The inclusion of water temperature and seasonality improved the power of TSM and SDD models.

  3. Detección de patrones y anomalías espectrales del terreno mediante espectrometría de imagen de alta resolución : reconocimiento, optimización y evaluación multiescenario

    OpenAIRE

    Rejas Ayuga, Juan Gregorio

    2014-01-01

    El objeto de esta Tesis doctoral es el desarrollo de una metodologia para la deteccion automatica de anomalias a partir de datos hiperespectrales o espectrometria de imagen, y su cartografiado bajo diferentes condiciones tipologicas de superficie y terreno. La tecnologia hiperespectral o espectrometria de imagen ofrece la posibilidad potencial de caracterizar con precision el estado de los materiales que conforman las diversas superficies en base a su respuesta espectral. Es...

  4. Filling Landsat ETM+ SLC-off gaps using a segmentation model approach

    Science.gov (United States)

    Maxwell, Susan

    2004-01-01

    The purpose of this article is to present a methodology for filling Landsat Scan Line Corrector (SLC)-off gaps with same-scene spectral data guided by a segmentation model. Failure of the SLC on the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) instrument resulted in a loss of approximately 25 percent of the spectral data. The missing data span across most of the image with scan gaps varying in size from two pixels near the center of the image to 14 pixels along the east and west edges. Even with the scan gaps, the radiometric and geometric qualities of the remaining portions of the image still meet design specifications and therefore contain useful information (see http:// landsat7.usgs.gov for additional information). The U.S. Geological Survey EROS Data Center (EDC) is evaluating several techniques to fill the gaps in SLC-off data to enhance the usability of the imagery (Howard and Lacasse 2004) (PE&RS, August 2004). The method presented here uses a segmentation model approach that allows for same-scene spectral data to be used to fill the gaps. The segment model is generated from a complete satellite image with no missing spectral data (e.g., Landsat 5, Landsat 7 SLCon, SPOT). The model is overlaid on the Landsat SLC-off image, and the missing data within the gaps are then estimated using SLC-off spectral data that intersect the segment boundary. A major advantage of this approach is that the gaps are filled using spectral data derived from the same SLC-off satellite image.

  5. Phenological monitoring of Acadia National Park using Landsat, MODIS and VIIRS observations and fused data

    Science.gov (United States)

    Liu, Y.; McDonough MacKenzie, C.; Primack, R.; Zhang, X.; Schaaf, C.; Sun, Q.; Wang, Z.

    2015-12-01

    Monitoring phenology with remotely sensed data has become standard practice in large-plot agriculture but remains an area of research in complex terrain. Landsat data (30m) provides a more appropriate spatial resolution to describe such regions but may only capture a few cloud-free images over a growing period. Daily data from the MODerate resolution Imaging Spectroradiometer(MODIS) and Visible Infrared Imaging Radiometer Suite(VIIRS) offer better temporal acquisitions but at coarse spatial resolutions of 250m to 1km. Thus fused data sets are being employed to provide the temporal and spatial resolutions necessary to accurately monitor vegetation phenology. This study focused on Acadia National Park, Maine, attempts to compare green-up from remote sensing and ground observations over varying topography. Three north-south field transects were established in 2013 on parallel mountains. Along these transects, researchers record the leaf out and flowering phenology for thirty plant species biweekly. These in situ spring phenological observations are compared with the dates detected by Landsat 7, Landsat 8, MODIS, and VIIRS observations, both separately and as fused data, to explore the ability of remotely sensed data to capture the subtle variations due to elevation. Daily Nadir BRDF Adjusted Reflectances(NBAR) from MODIS and VIIRS are fused with Landsat imagery to simulate 30m daily data via the Enhanced Spatial and Temporal Adaptive Reflectance Fusion Model(ESTARFM) algorithm. Piecewise logistic functions are fit to the time series to establish spring leaf-out dates. Acadia National Park, a region frequently affected by coastal clouds, is a particularly useful study area as it falls in a Landsat overlap region and thus offers the possibility of acquiring as many as 4 Landsat observations in a 16 day period. With the recent launch of Sentinel 2A, the community will have routine access to such high spatial and temporal data for phenological monitoring.

  6. Two techniques for mapping and area estimation of small grains in California using Landsat digital data

    Science.gov (United States)

    Sheffner, E. J.; Hlavka, C. A.; Bauer, E. M.

    1984-01-01

    Two techniques have been developed for the mapping and area estimation of small grains in California from Landsat digital data. The two techniques are Band Ratio Thresholding, a semi-automated version of a manual procedure, and LCLS, a layered classification technique which can be fully automated and is based on established clustering and classification technology. Preliminary evaluation results indicate that the two techniques have potential for providing map products which can be incorporated into existing inventory procedures and automated alternatives to traditional inventory techniques and those which currently employ Landsat imagery.

  7. Computer mapping of turbidity and circulation patterns in Saginaw Bay, Michigan from LANDSAT data

    Science.gov (United States)

    Rogers, R. H. (Principal Investigator); Reed, L. E.; Smith, V. E.

    1975-01-01

    The author has identified the following significant results. LANDSAT was used as a basis for producing geometrically-corrected, color-coded imagery of turbidity and circulation patterns in Saginaw Bay, Michigan (Lake Huron). This imagery shows nine discrete categories of turbidity, as indicated by nine Secchi depths between 0.3 and 3.3 meters. The categorized imagery provided an economical basis for extrapolating water quality parameters from point samples to unsample areas. LANDSAT furnished a synoptic view of water mass boundaries that no amount of ground sampling or monitoring could provide.

  8. Summary of Current Radiometric Calibration Coefficients for Landsat MSS, TM, ETM+, and EO-1 ALI Sensors

    Science.gov (United States)

    Chander, Gyanesh; Markham, Brian L.; Helder, Dennis L.

    2009-01-01

    This paper provides a summary of the current equations and rescaling factors for converting calibrated Digital Numbers (DNs) to absolute units of at-sensor spectral radiance, Top-Of- Atmosphere (TOA) reflectance, and at-sensor brightness temperature. It tabulates the necessary constants for the Multispectral Scanner (MSS), Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+), and Advanced Land Imager (ALI) sensors. These conversions provide a basis for standardized comparison of data in a single scene or between images acquired on different dates or by different sensors. This paper forms a needed guide for Landsat data users who now have access to the entire Landsat archive at no cost.

  9. Downscaling of MODIS One Kilometer Evapotranspiration Using Landsat-8 Data and Machine Learning Approaches

    Directory of Open Access Journals (Sweden)

    Yinghai Ke

    2016-03-01

    Full Text Available This study presented a MODIS 8-day 1 km evapotranspiration (ET downscaling method based on Landsat 8 data (30 m and machine learning approaches. Eleven indicators including albedo, land surface temperature (LST, and vegetation indices (VIs derived from Landsat 8 data were first upscaled to 1 km resolution. Machine learning algorithms including Support Vector Regression (SVR, Cubist, and Random Forest (RF were used to model the relationship between the Landsat indicators and MODIS 8-day 1 km ET. The models were then used to predict 30 m ET based on Landsat 8 indicators. A total of thirty-two pairs of Landsat 8 images/MODIS ET data were evaluated at four study sites including two in United States and two in South Korea. Among the three models, RF produced the lowest error, with relative Root Mean Square Error (rRMSE less than 20%. Vegetation greenness related indicators such as Normalized Difference Vegetation Index (NDVI, Enhanced Vegetation Index (EVI, Soil Adjusted Vegetation Index (SAVI, and vegetation moisture related indicators such as Normalized Difference Infrared Index—Landsat 8 OLI band 7 (NDIIb7 and Normalized Difference Water Index (NDWI were the five most important features used in RF model. Temperature-based indicators were less important than vegetation greenness and moisture-related indicators because LST could have considerable variation during each 8-day period. The predicted Landsat downscaled ET had good overall agreement with MODIS ET (average rRMSE = 22% and showed a similar temporal trend as MODIS ET. Compared to the MODIS ET product, the downscaled product demonstrated more spatial details, and had better agreement with in situ ET observations (R2 = 0.56. However, we found that the accuracy of MODIS ET was the main control factor of the accuracy of the downscaled product. Improved coarse-resolution ET estimation would result in better finer-resolution estimation. This study proved the potential of using machine learning

  10. Monitoring Springs in the Mojave Desert Using Landsat Time Series Analysis

    Science.gov (United States)

    Potter, Christopher S.

    2018-01-01

    The purpose of this study, based on Landsat satellite data was to characterize variations and trends over 30 consecutive years (1985-2016) in perennial vegetation green cover at over 400 confirmed Mojave Desert spring locations. These springs were surveyed between in 2015 and 2016 on lands managed in California by the U.S. Bureau of Land Management (BLM) and on several land trusts within the Barstow, Needles, and Ridgecrest BLM Field Offices. The normalized difference vegetation index (NDVI) from July Landsat images was computed at each spring location and a trend model was first fit to the multi-year NDVI time series using least squares linear regression.Â

  11. Comparison of LANDSAT-2 and field spectrometer reflectance signatures of south Texas rangeland plant communities

    Science.gov (United States)

    Richardson, A. J.; Escobar, D. E.; Gausman, H. W.; Everitt, J. H. (Principal Investigator)

    1982-01-01

    The accuracy was assessed for an atmospheric correction method that depends on clear water bodies to infer solar and atmospheric parameters for radiative transfer equations by measuring the reflectance signature of four prominent south Texas rangeland plants with the LANDSAT satellite multispectral scanner (MSS) and a ground based spectroradiometer. The rangeland plant reflectances produced by the two sensors were correlated with no significant deviation of the slope from unity or of the intercept from zero. These results indicated that the atmospheric correction produced LANDSAT MSS estimates of rangeland plant reflectances that are as accurate as the ground based spectroradiometer.

  12. A Cubesat enabled Spatio-Temporal Enhancement Method (CESTEM) utilizing Planet, Landsat and MODIS data

    KAUST Repository

    Houborg, Rasmus

    2018-03-19

    Satellite sensing in the visible to near-infrared (VNIR) domain has been the backbone of land surface monitoring and characterization for more than four decades. However, a limitation of conventional single-sensor satellite missions is their limited capacity to observe land surface dynamics at the very high spatial and temporal resolutions demanded by a wide range of applications. One solution to this spatio-temporal divide is an observation strategy based on the CubeSat standard, which facilitates constellations of small, inexpensive satellites. Repeatable near-daily image capture in RGB and near-infrared (NIR) bands at 3–4 m resolution has recently become available via a constellation of >130 CubeSats operated commercially by Planet. While the observing capacity afforded by this system is unprecedented, the relatively low radiometric quality and cross-sensor inconsistencies represent key challenges in the realization of their full potential as a game changer in Earth observation. To address this issue, we developed a Cubesat Enabled Spatio-Temporal Enhancement Method (CESTEM) that uses a multi-scale machine-learning technique to correct for radiometric inconsistencies between CubeSat acquisitions. The CESTEM produces Landsat 8 consistent atmospherically corrected surface reflectances in blue, green, red, and NIR bands, but at the spatial scale and temporal frequency of the CubeSat observations. An application of CESTEM over an agricultural dryland system in Saudi Arabia demonstrated CubeSat-based reproduction of Landsat 8 consistent VNIR data with an overall relative mean absolute deviation of 1.6% or better, even when the Landsat 8 and CubeSat acquisitions were temporally displaced by >32 days. The consistently high retrieval accuracies were achieved using a multi-scale target sampling scheme that draws Landsat 8 reference data from a series of scenes by using MODIS-consistent surface reflectance time series to quantify relative changes in Landsat

  13. Forest management applications of Landsat data in a geographic information system

    Science.gov (United States)

    Maw, K. D.; Brass, J. A.

    1982-01-01

    The utility of land-cover data resulting from Landsat MSS classification can be greatly enhanced by use in combination with ancillary data. A demonstration forest management applications data base was constructed for Santa Cruz County, California, to demonstrate geographic information system applications of classified Landsat data. The data base contained detailed soils, digital terrain, land ownership, jurisdictional boundaries, fire events, and generalized land-use data, all registered to a UTM grid base. Applications models were developed from problems typical of fire management and reforestation planning.

  14. BOREAS RSS-7 Landsat TM LAI IMages of the SSA and NSA

    Science.gov (United States)

    Hall, Forrest G. (Editor); Nickeson, Jaime (Editor); Chen, Jing; Cihlar, Josef

    2000-01-01

    The BOReal Ecosystem-Atmosphere Study Remote Sensing Science (BOREAS RSS-7) team used Landsat Thematic Mapper (TM) images processed at CCRS to produce images of Leaf Area Index (LAI) for the BOREAS study areas. Two images acquired on 06-Jun and 09-Aug-1991 were used for the SSA, and one image acquired on 09-Jun-1994 was used for the NSA. The LAI images are based on ground measurements and Landsat TM Reduced Simple Ratio (RSR) images. The data are stored in binary image-format files.

  15. Extensão do SGBD PostgreSQL para suportar recuperação de imagens por conteúdo

    OpenAIRE

    Melo, Ernani Viriato de

    2006-01-01

    Este projeto descreve uma extensão para o SGBDR PostgreSQL para suportar recuperação de imagens por conteúdo. Esta extensão, denominada PostgreSQL-IE, é independente de aplicação e possui as vantagens de ser portável e de ter o código aberto. A linguagem SQL estendida (SQL-IE), disponibilizada pelo PostgreSQL-IE, é composta por um conjunto de funções que inclui comandos para criar novas funções de extração do conteúdo das imagens, novos vetores de características com uma combin...

  16. Ciegos que ahora ven: Presupuestos teóricos y pistas didácticas para la lectura de la imagen cinematográfica (I

    Directory of Open Access Journals (Sweden)

    Erasto Antonio Espino Barahona

    2003-01-01

    Full Text Available Este artículo –del cual se presenta aquí una primera parte– constituye un entramado teórico-didáctico para la lectura de la imagen cinematográfica. Se trata del resultado de una investigación etnográfica que, desde la observación sistemática y la entrevista en profundidad a expertos, se articula con fuentes teóricas pertinentes con la pretensión de generar una propuesta didáctica para superar el analfabetismo icónico imperante y transitar, así, de una actitud consumista frente a la imagen cinematográfica a una experiencia productora de sentido.

  17. (Rexistir com imagens: considerações sobre a produção audiovisual indígena no Brasil

    Directory of Open Access Journals (Sweden)

    Karliane Macedo Nunes

    2017-01-01

    Full Text Available O presente artigo trata das produções audiovisuais indígenas realizadas no Brasil, sobretudo aquelas vinculadas ao projeto Vídeo nas Aldeias, que desde o final dos anos 1980 vem promovendo oficinas de formação audiovisual em diversos territórios, incentivando o protagonismo de jovens indígenas na construção de suas imagens e narrativas. Chama a atenção a forma criativa como os jovens cineastas vem se apropriando das tecnologias de modo a produzir filmes que - para além propósito inicial de registrar e “preservar” a tradição – potencializam as possibilidades abertas pelo cinema, pondo-se a criar novas imagens, (reinventar culturas, abalar imaginários, manter-se em movimento, (rexistir.

  18. Segmentação das áreas isquêmicas no acidente vascular cerebral utilizando imagens de tomografia computadorizada de perfusão

    OpenAIRE

    Lilian Contin

    2011-01-01

    As técnicas de processamento digital de imagens têm sido vastamente aplicadas às imagens médicas. Um dos benefícios ocasionado por estas ferramentas é o de prover medidas de parâmetros que são difíceis de estimar e suscetíveis a viés do médico. O presente trabalho teve por objetivo desenvolver um software semi-automático de segmentação das áreas isquêmicas, core e penumbra, no acidente vascular cerebral, utilizando técnicas de segmentação por limiarização e baseada em regiões. Os dois algorit...

  19. MELHORIA DO PROCESSO DE CORREÇÃO GEOMÉTRICA DE IMAGENS CBERS-CCD PELO USO DE AMOSTRAS GEORREFERENCIADAS CLASSIFICADAS

    OpenAIRE

    Castejon, Emiliano Ferreira; Fonseca, Leila Maria Garcia; Forster, Carlos Henrique Quartucci

    2015-01-01

    As imagens da série de satélites CBERS são distribuídas gratuitamente, mas para que seja possível utilizá-las, é necessário aplicar um método de correção geométrica. É proposta uma melhoria do processo de correção automática de forma a selecionar as melhores amostras de referência a partir das quais é possível definir pontos de controle usados para o cálculo dos parâmetros do modelo usado na correção. Para demonstrar a eficácia, o método proposto é aplicado em um conjunto de imagens CBERS usa...

  20. Aplicación de técnicas de diagnóstico por imagen avanzadas en el estudio de la cabeza del caballo

    OpenAIRE

    Manso Díaz, Gabriel

    2015-01-01

    La cabeza del caballo es una muy compleja anatómicamente lo que dificulta su diagnóstico. Por tanto las técnicas de diagnóstico por imagen son fundamentales.Las técnicas de diagnóstico por imagen avanzadas, resonancia magnética o RM y tomografía computarizada o TC, generan imágenes tomográficas, evitando la superposición de estructuras. La TC se basa en la rotación de un generador de rayos x y una matriz de detectores alrededor del paciente, mientras que la RM se basa en la excitación de teji...

  1. VOCES FOTOGRÁFICAS: EL USO DE LA IMAGEN EN PROYECTOS DE COMUNICACIÓN Y DESARROLLO EN EL SUR DE BOLIVIA

    Directory of Open Access Journals (Sweden)

    Mónica Eliana García Gil

    2008-01-01

    Full Text Available Este texto aborda el uso de la imagen fotográfica como herramienta de investigación en Ciencias Sociales, espe - cialmente en proyectos de comunicación y desarrollo, tomando como punto de partida la imagen, no sólo como medio para recolectar información sino también como parte activa del proceso de investigación, en el cual la fotografía puede impulsar procesos de autorreconocimiento y de transformación social. Asimismo, se desarrolla el planteamiento metodológico de Photovoice (foto voz o voz fotográfica y, finalmente, se presentan algunos resultados del proyecto participativo denominado Chaicuriri por el Objetivo, experiencia desarrollada en Bolivia que posibilitó a los habitantes de una zona rural establecer sus propias nociones de desarrollo comunitario a partir del uso de la fotografía.

  2. Classificação de óleos vegetais comestíveis usando imagens digitais e técnicas de reconhecimento de padrões

    OpenAIRE

    Milanez, Karla Danielle Tavares de Melo

    2013-01-01

    Este trabalho apresenta um método simples e de baixo custo, baseado na utilização de imagens digitais e técnicas de reconhecimento de padrões, para a classificação de óleos vegetais comestíveis com relação ao tipo (soja, canola, girassol e milho) e ao estado de conservação (prazo de validade expirado e não expirado). Para isso, imagens das amostras de óleos vegetais foram obtidas a partir de uma webcam e, em seguida, as mesmas foram decompostas em histogramas contendo as distribuições dos nív...

  3. Una introducción a la imagen literaria del pintor en la España del Siglo de Oro

    Directory of Open Access Journals (Sweden)

    Javier Portús Pérez

    1999-01-01

    Full Text Available La literatura española es extraordinariamente rica en referencias a artistas. En este artículo se estudia la imagen que se deriva de esas alusiones y se reflexiona sobre los intereses sociales e intelectuales que se hallan detrás de esa imagen. También se trata sobre el carácter instrumental que a veces tenían las menciones a pintores para predisponer a la opinión pública hacia este grupo profesional.Spanish literature includes an extraordinary number of mentions to artists. This article studies the idea of the artist that emerges from these literary references, and the social and intellectual concerns that lie behind them. It also deals with the way in which mentions to painters could be used in orden to gain public support for that profession.

  4. Diseño y Validación de un Cuestionario de Imagen Corporal Para Personas en Situación de Discapacidad Física

    Directory of Open Access Journals (Sweden)

    PAULA ANDREA BOTERO SOTO

    2015-01-01

    Full Text Available El presente estudio pretendió diseñar y validar el Cuestionario de Imagen Corporal para Personas con Discapacidad Física. La muestra incidental estuvo conformada por 114 personas de 18 a 50 años, residentes en Bogotá, que presentaban una discapacidad física. Se diseñaron 40 ítems, evaluados por jueces expertos, se aplicaron a la muestra y se definieron los criterios de calificación. El análisis factorial evidenció la existencia de tres factores constituyentes del constructo de imagen corporal: atractivo, funcionalidad y satisfacción. El cuestionario cumplió con las condiciones de confiabilidad y validez necesarias, por lo que se concluye que es posible utilizarlo, aunque es preciso continuar con el proceso de validación.

  5. Mackenzie River Delta morphological change based on Landsat time series

    Science.gov (United States)

    Vesakoski, Jenni-Mari; Alho, Petteri; Gustafsson, David; Arheimer, Berit; Isberg, Kristina

    2015-04-01

    Arctic rivers are sensitive and yet quite unexplored river systems to which the climate change will impact on. Research has not focused in detail on the fluvial geomorphology of the Arctic rivers mainly due to the remoteness and wideness of the watersheds, problems with data availability and difficult accessibility. Nowadays wide collaborative spatial databases in hydrology as well as extensive remote sensing datasets over the Arctic are available and they enable improved investigation of the Arctic watersheds. Thereby, it is also important to develop and improve methods that enable detecting the fluvio-morphological processes based on the available data. Furthermore, it is essential to reconstruct and improve the understanding of the past fluvial processes in order to better understand prevailing and future fluvial processes. In this study we sum up the fluvial geomorphological change in the Mackenzie River Delta during the last ~30 years. The Mackenzie River Delta (~13 000 km2) is situated in the North Western Territories, Canada where the Mackenzie River enters to the Beaufort Sea, Arctic Ocean near the city of Inuvik. Mackenzie River Delta is lake-rich, productive ecosystem and ecologically sensitive environment. Research objective is achieved through two sub-objectives: 1) Interpretation of the deltaic river channel planform change by applying Landsat time series. 2) Definition of the variables that have impacted the most on detected changes by applying statistics and long hydrological time series derived from Arctic-HYPE model (HYdrologic Predictions for Environment) developed by Swedish Meteorological and Hydrological Institute. According to our satellite interpretation, field observations and statistical analyses, notable spatio-temporal changes have occurred in the morphology of the river channel and delta during the past 30 years. For example, the channels have been developing in braiding and sinuosity. In addition, various linkages between the studied

  6. Spatiotemporal Built-up Land Density Mapping Using Various Spectral Indices in Landsat-7 ETM+ and Landsat-8 OLI/TIRS (Case Study: Surakarta City)

    Science.gov (United States)

    Risky, Yanuar S.; Aulia, Yogi H.; Widayani, Prima

    2017-12-01

    Spectral indices variations support for rapid and accurate extracting information such as built-up density. However, the exact determination of spectral waves for built-up density extraction is lacking. This study explains and compares the capabilities of 5 variations of spectral indices in spatiotemporal built-up density mapping using Landsat-7 ETM+ and Landsat-8 OLI/TIRS in Surakarta City on 2002 and 2015. The spectral indices variations used are 3 mid-infrared (MIR) based indices such as the Normalized Difference Built-up Index (NDBI), Urban Index (UI) and Built-up and 2 visible based indices such as VrNIR-BI (visible red) and VgNIR-BI (visible green). Linear regression statistics between ground value samples from Google Earth image in 2002 and 2015 and spectral indices for determining built-up land density. Ground value used amounted to 27 samples for model and 7 samples for accuracy test. The classification of built-up density mapping is divided into 9 classes: unclassified, 0-12.5%, 12.5-25%, 25-37.5%, 37.5-50%, 50-62.5%, 62.5-75%, 75-87.5% and 87.5-100 %. Accuracy of built-up land density mapping in 2002 and 2015 using VrNIR-BI (81,823% and 73.235%), VgNIR-BI (78.934% and 69.028%), NDBI (34.870% and 74.365%), UI (43.273% and 64.398%) and Built-up (59.755% and 72.664%). Based all spectral indices, Surakarta City on 2000-2015 has increased of built-up land density. VgNIR-BI has better capabilities for built-up land density mapping on Landsat-7 ETM + and Landsat-8 OLI/TIRS.

  7. Incidencia de la imagen corporativa en el posicionamiento de las ventas, mediante una investigación de mercado que involucre a los clientes.

    Directory of Open Access Journals (Sweden)

    Nathyn Collins

    2016-01-01

    Full Text Available En la actualidad las empresas necesitan crear una Imagen idónea, compuesta por elementos identificadores distintivos, que permitan la diferenciación por parte de la empresa y a la vez genera atención, aceptación y confianza al cliente. Así mismo, parte de esta Imagen, es lograr el posicionamiento positivo de la empresa en el cliente, esto consiste en ocupar un lugar en la mente y corazón del consumidor, para que en el proceso de la compra, sea este un signo distintivo que permita al final elegir el producto que oferta aquella empresa. En este trabajo se desarrolla a partir de una investigación de campo y bibliográfica que analiza profundamente encuesta y sesiones de grupo la influencia de la imagen corporativa y posicionamiento en las ventas. Los datos del estudio muestran el alto nivel de influencia que se origina por una imagen acorde a las expectativas de los clientes, las cuales permiten crear estima y relevancia de marca de una empresa ante el cliente meta.   ABSTRACT Today companies need to create an ideal image, composed of distinctive identifiers that allow differentiation by the company while generating attention, customer acceptance and trust. Also, part of this picture is to achieve positive positioning of the company in the customer, this is a place in the hearts and minds of the consumer, so that in the process of purchase, this is a distinctive sign which allows the end choose the product that this company offer. This paper analyzes from a survey and focus groups the influence of corporate image and sales positioning. The study data show the high level of influence that arises from an image according to the expectations of customers, which allow you to create estimates and significance of a company's brand to the target customer.

  8. Amenaza e invasión de la imagen. Un estudio sobre la naturaleza de la cortesía verbal.

    Directory of Open Access Journals (Sweden)

    José María Gil

    2010-11-01

    Full Text Available Normal 0 21 false false false ES X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} De acuerdo con el trabajo fundacional de P. Brown y S. Levinson (1978, 1987, algunos actos verbales (y no verbales son intrínsecamente amenazadores de la imagen del hablante (H o del oyente (O. En este trabajo voy a sostener que en realidad todos los actos de habla, i.e., todos los enunciados, afectan inevitablemente la imagen de H y de O. Esta postura nos lleva a distinguir entre actos de habla no-descorteses y actos de habla descorteses. Los actos de habla no-descorteses, que pueden involucrar estrategias de cortesía, amenazan la imagen de H y de O. Los actos descorteses directamente invaden la imagen de O y, por ello, la de H.

  9. Discriminação de variedades de citros em imagens CCD/CBERS-2 Discrimination of citrus varieties using CCD/CBERS-2 satellite imagery

    Directory of Open Access Journals (Sweden)

    Ieda Del'Arco Sanches

    2008-02-01

    Full Text Available O presente trabalho teve o objetivo de avaliar as imagens CCD/CBERS-2 quanto à possibilidade de discriminarem variedades de citros. A área de estudo localiza-se em Itirapina (SP e, para este estudo, foram utilizadas imagens CCD de três datas (30/05/2004, 16/08/2004 e 11/09/2004. Um modelo que integra os elementos componentes da cena citrícola sensoriada é proposto com o objetivo de explicar a variabilidade das respostas das parcelas de citros em imagens orbitais do tipo CCD/CBERS-2. Foram feitas classificações pelos algoritmos Isoseg e Maxver e, de acordo com o índice kappa, concluiu-se que é possível obterem-se exatidões qualificadas como muito boas, sendo que as melhores classificações foram conseguidas com imagens da estação seca.This paper was aimed at evaluating the possibility of discriminating citrus varieties in CCD imageries from CBERS-2 satellite ("China-Brazil Earth Resouces Satellite". The study area is located in Itirapina, São Paulo State. For this study, three CCD images from 2004 were acquired (May 30, August 16, and September 11. In order to acquire a better understanding and for explaining the variability of the spectral behavior of the citrus areas in orbital images (like as the CCD/CBERS-2 images a model that integrates the elements of the citrus scene is proposed and discussed. The images were classified by Isoseg and MaxVer classifiers. According to kappa index, it was possible to obtain classifications qualified as 'very good'. The best results were obtained with the images from the dry season.

  10. Arquivamento e comunicação de imagens radiológicas na formação médica online

    Directory of Open Access Journals (Sweden)

    Alexandre Nogueira dos Santos

    Full Text Available O estudo investiga as possibilidades de utilização dos recursos de arquivamento e comunicação de imagens nas salas de aula e à distância no processo de formação médica através da telemedicina. Discutem-se as possibilidades de usar programas de informática que reproduzem os recursos de diferentes meios de diagnóstico por imagem como ferramenta didática nas aulas de telemedicina, por meio do acesso a imagens radiológicas utilizando sistemas de informática para fins de emissão de laudos à distância na formação médica. Avaliou-se a apresentação de imagens digitais nas salas de aula dos cursos de saúde a partir da experiência de residentes em formação que atuam na modalidade online, por meio de questionários aplicados com especialistas e residentes que atuam no caso relatado no estudo. Os aspectos de formação docente dos médicos, especialmente para atuar em ambientes online, definição de metodologias de avaliação, interação entre os sujeitos envolvidos foram avaliados para considerar a possibilidade de usar a experiência em cursos de Medicina como um meio de educação à distância (EAD utilizando Arquivamento e Comunicação de Imagens (PACS

  11. Feocromocitoma bilateral: la importancia de los estudios de diagnóstico por imagen Bilateral pheochromocytoma: the importance of imaging studies

    Directory of Open Access Journals (Sweden)

    Igor I Bonnet

    2011-10-01

    Full Text Available Se presenta un caso clínico poco frecuente de feocromocitoma bilateral, en el cual los estudios de diagnóstico por imagen, tanto de información estructural como funcional, constituyeron una fuente fundamental para su detección y seguimiento.We report a rare case of bilateral pheochromocytoma, in which imaging studies, both of structural and functional information, were a major source for its detection and follow-up.

  12. Landsat at 45: How it Changed the Way We See the Earth

    Science.gov (United States)

    Uri, John

    2017-01-01

    On October 24, 1946, more than 10 years before the launch of the first artificial satellite Sputnik, scientists at the White Sands Missile Range in New Mexico placed a camera on top of a captured German V-2 ballistic missile. As the rocket flew to an altitude of about 65 miles - just above the generally recognized border of outer space - the 35-millimeter motion picture camera snapped a frame every one and a half seconds. Minutes later, the missile came crashing back down and slammed into the ground at more than 340 mph, but the film survived and gave us our first glimpse of Earth from space. Earth Resources Technology Satellite aka Landsat It was images like those first grainy black and white pictures and later those taken by America's first astronauts in the 1960's that inspired the development of the Earth Resources Technology Satellite (ERTS). From the unique vantage point of space, we could now observe Earth using a variety of different instruments to monitor changes over time. The ERTS-1 satellite, wisely renamed Landsat-1, was launched aboard a Delta rocket on July 23, 1972, into a Sun-synchronous polar orbit at an altitude of about 560 miles. In this unique orbit, Landsat could observe the same point on the Earth every 18 days, always with the same solar illumination, allowing for precise monitoring of changes on the ground over time. Landsat-1, derived from the highly successful Nimbus weather satellites, carried two instruments that allowed it to take images not only in visible light but also in infrared, well-suited to track changes in vegetation over time. Designed to last only one year, Landsat-1 actually operated for nearly three years, by which time it had been joined in space by Landsat-2, a near identical copy of the original. Since then, ever more sophisticated instruments were flown aboard Landsat-3 through -8, with Landsat-9 planned for launch in 2020, acquiring millions of images of Earth over more than four decades. At first, images from

  13. Avaliação da morfologia interna de sementes de Acca sellowiana O. Berg por meio de análise de imagens

    Directory of Open Access Journals (Sweden)

    Vanessa Neumann Silva

    2013-12-01

    Full Text Available Acca sellowiana O. (Berg Burret é uma fruteira nativa da região Sul do Brasil e do Uruguai, que apresenta grande potencial de uso na recuperação de áreas degradadas. O objetivo deste trabalho foi avaliar a morfologia interna de sementes de Acca sellowiana O. Berg por meio da análise de imagens de raios X e relacionar os resultados com a germinação das sementes. Sementes de Acca sellowiana O. Berg, representadas por três lotes, foram analisadas pelo teste de raios X e, posteriormente, conduzidas ao teste de germinação, com avaliação aos 44 dias após a semeadura. As imagens de raios X foram analisadas com o software ImageJ. A análise das imagens radiográficas de sementes de Acca sellowiana permite a mensuração das áreas internas livres, assim como a determinação da relação entre estas e a germinação. Danos internos detectados por meio de raios X afetam a germinação das sementes.

  14. PRODUÇÃO DE MATERIAL INSTRUCIONAL PARA O ENSINO DA RADIOLOGIA POR MEIO DA DIGITALIZAÇÃO DE IMAGENS

    Directory of Open Access Journals (Sweden)

    Geraldeli Flávio E.

    2002-01-01

    Full Text Available Criou-se um banco de dados usando a digitalização de imagens radiográficas para salvá-las da deterioração do tempo e, também, tornar mais ágil sua manipulação pelos profissionais que as utilizam. Foi criado um banco de dados que torna possível o armazenamento dos dados clínicos de cada paciente e, vinculadas a esses dados, suas respectivas imagens digitalizadas, com o propósito de ensino e pesquisa. Os elementos que compõem o banco de dados foram determinados por meio de pesquisa feita com os professores do Departamento de Radiologia da Universidade Federal do Rio de Janeiro. Conseguiu-se elaborar um sistema que contém dados e imagens, de baixo custo e de fácil manipulação por parte dos usuários.

  15. A influência de imagens tridimensionais no plano de tratamento ortodôntico Orthodontic treatment plan changed by 3-D images

    Directory of Open Access Journals (Sweden)

    Iury Oliveira Castro

    2011-02-01

    Full Text Available INTRODUÇÃO: a tomografia computadorizada de feixe cônico (TCFC foi introduzida no final da década de 90 e estudos têm aprimorado o seu emprego na Odontologia. OBJETIVO: o objetivo desse artigo foi verificar a influência de imagens tridimensionais (3D no plano de tratamento ortodôntico. MÉTODOS: duas situações clínicas (reabsorção cervical e deiscência óssea foram descritas por meio de imagens 3D. RESULTADOS: a conduta ortodôntica foi redirecionada para a simplificação da mecânica e o controle das lesões durante o tratamento ortodôntico. CONCLUSÃO: imagens 3D são capazes de aumentar a acurácia do diagnóstico e redirecionar o plano de tratamento ortodôntico.INTRODUCTION: Cone-Beam Computed Tomography (CBCT was introduced in the 90's and studies have improved its use in dentistry. OBJECTIVE: The aim of this article was to investigate the influence of three-dimensional (3D images in orthodontic treatment planning. METHOD: Two clinical situations (bone dehiscence and cervical resorption were described by 3D images. RESULTS: The orthodontic treatment plan was redirected to a simplified mechanics and control of the lesions during orthodontic treatment. CONCLUSION: 3D images are able to increase diagnostic accuracy and redirect orthodontic treatment plan.

  16. Los componentes de la imagen de la nación como base para formulación de la identidad competitiva: el caso del Perú

    Directory of Open Access Journals (Sweden)

    Gina Pipoli de Azambuja

    2009-06-01

    Full Text Available En el mundo globalizado en el que vivimos, hoy, los países pugnan por diferenciarse unos a otros como mecanismo para poder atraer más turistas, incrementar el volumen de sus exportaciones y captar más inversiones, de manera que puedan tener mayores fuentes de ingresos. Para ello, buscan lograr una diferenciación en el mercado, a partir de los elementos que constituyen su identidad nacional, la cual influirá en la percepción de la imagen de la nación del consumidor y será la base para generar su identidad competitiva, que constituirá la piedra angular sobre la que se diseñará la estrategia de marketing internacional de los países para salir a competir en el mercado internacional.Es así que la identidad competitiva se ha convertido en una pieza clave para promover la competitividad nacional, al sintetizar la imagen de la nación mostrada al mercado para cumplir sus objetivos. Por tal motivo, el objetivo de este trabajo es identificar los elementos de la imagen nación Perú, a partir de la identidad nacional percibida por los consumidores, tanto nacionales como extranjeros, para que sobre esa base se diseñe una estrategia de identidad competitiva para el Perú.

  17. ESTUDO DE ETNOECODESIGN DE IMAGENS SACRAS EM GESSO DANIFICADAS E DESCARTADAS PELO USUÁRIO. ESTUDO DE MODELO SUSTENTÁVEL DE NICHO DE DESCARTE.

    Directory of Open Access Journals (Sweden)

    Paulo Sergio de Sena

    2016-10-01

    Full Text Available O Etnoecodesingn trata-se de um estudo interdisciplinar onde o dialogo envolve os critérios culturais, sociais e ambientais. Os componentes etnoecológicos do estudo das Imagens Sacras de Gesso se materializam no grupo de artesãos tradicionais locais (mais de 100 anos de exploração da técnica e recurso natural gesso. Na produção de imagens sacras, como souvenir, em Aparecida- SP, que agrega processos e materiais que contribuem significativamente para contaminação do ambiente, durante a pré-produção, produção, pós-produção e descarte, principalmente quando houve constatação, no projeto anterior, de matéria prima contaminada por metais pesados. Este trabalho trata dos possíveis impactos causados pelo descarte das imagens, uma vez danificadas, diretamente no ambiente por conta de uma prática cultural denominada de “Santa Cruz” e vem contribuir para o estudo comparado dos atuais modelos de nicho de descarte e a proposta de um modelo mais sustentável para a Santa Cruz.

  18. ASPECTOS DIFERENCIALES EN LA IMAGEN CORPORAL Y LA AUTODESCRIPCIÓN DE LA FORMA FÍSICA EN MUJERES SEDENTARIAS VS. MUJERES ACTIVAS DEPORTIVAMENTE

    Directory of Open Access Journals (Sweden)

    F. Arbinaga Ibarzábal

    2010-10-01

    Full Text Available

     

    Se analizan las relaciones entre imagen corporal y autodescripción física en mujeres que practican danza aeróbica de forma amateur frente a un grupo de mujeres sedentarias.
    La muestra se compuso de 112 mujeres activas deportivamente y 51 mujeres sedentarias.
    Los resultados al “Body Shape Questionnaire” (B.S.Q indican que no se presentan diferencias significativas entre las mujeres sedentarias y las mujeres activas. Del conjunto de la muestra, el 18,4% de las mujeres presentaría problemas con la imagen corporal; siendo en las sedentarias el 19,6% y en las activas el 17,9%. Al valorar los resultados en el “Physical Self-Description Questionnaire” (P.S.D.Q, las mujeres sedentarias puntúan por debajo de las activas en todos los factores salvo en el de fuerza.
    Palabras Clave: imagen corporal, forma física, aeróbic, mujer, sedentarias.

  19. Irrupción y metamorfosis: la imagen en la poesía de Mario Ortiz. Para una crítica poética

    Directory of Open Access Journals (Sweden)

    Ana Porrúa

    2014-11-01

    Full Text Available La poesía de Mario Ortiz podría pensarse como una escritura crítica dentro de la poesía argentina de los 90, o al menos de su gesto objetivista y su gesto realista. El modo de la crítica es la imagen en tanto irrupción, advenimiento de la imaginación (imago, en el sentido que le da Didi-Huberman que parte, en estos casos, de lo concreto, incluso de lo nimio. La fuerza de la imagen en tanto proceso en la poesía de Ortiz establece un movimiento que le devuelve a los objetos de uso su aura, a la vez que sostiene su definición materialista; un doblez en el que, además, se construye el relicario, la miniatura e incluso la colección. A la vez, puede leerse esta aparición de la imagen como migración y metamorfosis de los objetos tal como aparecen en los poemas más objetivistas y como revisión de sus colecciones

  20. CARTOGRAFÍA DE LA VEGETACIÓN DE LA ISLA DE BIOKO (GUINEA ECUATORIAL MEDIANTE EL USO DE IMÁGENES LANDSAT 7 ETM+: PARTICULARIZACIÓN DEL PISO AFROMONTANO

    Directory of Open Access Journals (Sweden)

    Rafael M. Navarro Cerrillo

    2012-01-01

    Full Text Available La gestión forestal sostenible requiere de una información cartográfica adecuada. En este trabajo se elaboró una cartografía actual de la vegetación de la isla de Bioko (Guinea Ecuatorial basada en la clasificación supervisada de una imagen Landsat 7 ETM+, y una cartografía de la vegetación del piso afromontano, que incluye datos de la distribución, la superficie y los tipos forestales con presencia de Prunus africana. Se proponen seis nuevos tipos de vegetación de transición entre los bosques Guineo- Congolesa y los bosques afromontanos, y distintas formaciones afromontanas secundarias. El mapa de vegetación de Bioko tuvo un coeficiente Kappa de 0,69. Los principales errores se asociaron a las clases correspondientes a bosque secundarios de tierras bajas y a las zonas de transición entre los bosques congoleses y afromontanos. La fiabilidad del análisis mejoró en una segunda clasificación restringida a la vegetación afromontana de la isla (> 1400 m s.m., obteniéndose un coeficiente Kappa de 0,81. En este trabajo se muestra la utilidad de la teledetección para la elaboración de cartografía en zonas tropicales de escasa accesibilidad, dado que se obtuvieron resultados con una fiabilidad adecuada para la gestión forestal.

  1. Cinema e juventude: uma discussão sobre ética das imagens = Cinema and youth: a discussion about image and ethics = Cine y juventud: una discusión sobre la ética de imagen

    Directory of Open Access Journals (Sweden)

    Fischer, Rosa Maria Bueno

    2014-01-01

    Full Text Available O artigo discute dados de pesquisa recente com jovens estudantes de cursos de Pedagogia, a respeito da sua relação com narrativas da TV, da internet e especialmente do cinema. No tratamento dos dados, debatemos o conceito de imagem, com o objetivo de introduzir nessa discussão a relevante perspectiva do olhar do espectador, dos jogos de olhar que se dão no espaço da cultura, e também dos discursos que circulam, como uma espécie particular de mediação, numa determinada formação social. Com base em Foucault, Didi-Huberman, Badiou e Ismail Xavier, entre outros, e com o recurso a exemplos de narrativas cinematográficas, enfatizamos a “presença ausente” das imagens, uma vez que estas, diferente do que se diz no senso comum, não se apresentam a nós como transparência (pelo contrário, elas sempre carregam forte carga de opacidade. Entendemos que isso tem consequências importantes, dos pontos de vista ético e estético, para a formação docente

  2. Using space-time features to improve detection of forest disturbances from Landsat time series

    NARCIS (Netherlands)

    Hamunyela, E.; Reiche, J.; Verbesselt, J.; Herold, M.

    2017-01-01

    Current research on forest change monitoring using medium spatial resolution Landsat satellite data aims for accurate and timely detection of forest disturbances. However, producing forest disturbance maps that have both high spatial and temporal accuracy is still challenging because of the

  3. A forest map of Southern Africa with the aid of LANDSAT imagery

    CSIR Research Space (South Africa)

    Van der Zel, DW

    1988-01-01

    Full Text Available Even after 300 years of indigenous forest protection as well as 100 years of plantation forestry, no forestry map of South Africa was available. The development and availability of LANDSAT images in the early 1970s opened possibility to use...

  4. How Similar Are Forest Disturbance Maps Derived from Different Landsat Time Series Algorithms?

    Directory of Open Access Journals (Sweden)

    Warren B. Cohen

    2017-03-01

    Full Text Available Disturbance is a critical ecological process in forested systems, and disturbance maps are important for understanding forest dynamics. Landsat data are a key remote sensing dataset for monitoring forest disturbance and there recently has been major growth in the development of disturbance mapping algorithms. Many of these algorithms take advantage of the high temporal data volume to mine subtle signals in Landsat time series, but as those signals become subtler, they are more likely to be mixed with noise in Landsat data. This study examines the similarity among seven different algorithms in their ability to map the full range of magnitudes of forest disturbance over six different Landsat scenes distributed across the conterminous US. The maps agreed very well in terms of the amount of undisturbed forest over time; however, for the ~30% of forest mapped as disturbed in a given year by at least one algorithm, there was little agreement about which pixels were affected. Algorithms that targeted higher-magnitude disturbances exhibited higher omission errors but lower commission errors than those targeting a broader range of disturbance magnitudes. These results suggest that a user of any given forest disturbance map should understand the map’s strengths and weaknesses (in terms of omission and commission error rates, with respect to the disturbance targets of interest.

  5. Development of the Landsat Data Continuity Mission Cloud Cover Assessment Algorithms

    Science.gov (United States)

    Scaramuzza, Pat; Bouchard, M.A.; Dwyer, John L.

    2012-01-01

    The upcoming launch of the Operational Land Imager (OLI) will start the next era of the Landsat program. However, the Automated Cloud-Cover Assessment (CCA) (ACCA) algorithm used on Landsat 7 requires a thermal band and is thus not suited for OLI. There will be a thermal instrument on the Landsat Data Continuity Mission (LDCM)-the Thermal Infrared Sensor-which may not be available during all OLI collections. This illustrates a need for CCA for LDCM in the absence of thermal data. To research possibilities for full-resolution OLI cloud assessment, a global data set of 207 Landsat 7 scenes with manually generated cloud masks was created. It was used to evaluate the ACCA algorithm, showing that the algorithm correctly classified 79.9% of a standard test subset of 3.95 109 pixels. The data set was also used to develop and validate two successor algorithms for use with OLI data-one derived from an off-the-shelf machine learning package and one based on ACCA but enhanced by a simple neural network. These comprehensive CCA algorithms were shown to correctly classify pixels as cloudy or clear 88.5% and 89.7% of the time, respectively.

  6. Modified Optimization Water Index (mowi) for LANDSAT-8 Oli/tirs

    Science.gov (United States)

    Moradi, M.; Sahebi, M.; Shokri, M.

    2017-09-01

    Water is one of the most important resources that essential need for human life. Due to population growth and increasing need of human to water, proper management of water resources will be one of the serious challenges of next decades. Remote sensing data is the best way to the management of water resources due time and cost effectiveness over a greater range of temporal and spatial scales. Between many kinds of satellite data, from SAR to optic or from high resolution to low resolution, Landsat imagery is more interesting data for water detection and management of earth surface water. Landsat8 OLI/TIRS is the newest version of Landsat satellite series. In this paper, we investigated the full spectral potential of Landsat8 for water detection. It is developed many kinds of methods for this purpose that index based methods have some advantages than other methods. Pervious indices just use a limited number of spectral band. In this paper, Modified Optimization Water Index (MOWI) defined by consideration of a linear combination of bands that each coefficient of bands calculated by particle swarm algorithm. The result shows that modified optimization water index (MOWI) has a proper performance on different condition like cloud, cloud shadow and mountain shadow.

  7. Oyster Aquaculture Site Selection Using Landsat 8-Derived Sea Surface Temperature, Turbidity, and Chlorophyll a

    Directory of Open Access Journals (Sweden)

    Jordan Snyder

    2017-06-01

    Full Text Available Remote sensing data is useful for selection of aquaculture sites because it can provide water-quality products mapped over large regions at low cost to users. However, the spatial resolution of most ocean color satellites is too coarse to provide usable data within many estuaries. The Landsat 8 satellite, launched February 11, 2013, has both the spatial resolution and the necessary signal to noise ratio to provide temperature, as well as ocean color derived products along complex coastlines. The state of Maine (USA has an abundance of estuarine indentations (~3,500 miles of tidal shoreline within 220 miles of coast, and an expanding aquaculture industry, which makes it a prime case-study for using Landsat 8 data to provide products suitable for aquaculture site selection. We collected the Landsat 8 scenes over coastal Maine, flagged clouds, atmospherically corrected the top-of-the-atmosphere radiances, and derived time varying fields (repeat time of Landsat 8 is 16 days of temperature (100 m resolution, turbidity (30 m resolution, and chlorophyll a (30 m resolution. We validated the remote-sensing-based products at several in situ locations along the Maine coast where monitoring buoys and programs are in place. Initial analysis of the validated fields revealed promising new areas for oyster aquaculture. The approach used is applicable to other coastal regions and the data collected to date show potential for other applications in marine coastal environments, including water quality monitoring and ecosystem management.

  8. The Use of Landsat and Aerial Photography for the Assessment of ...

    African Journals Online (AJOL)

    Coastal erosion is a worldwide hazard, the consequences of which can only be mitigated via thorough and efficient monitoring of erosion. This study aimed to employ remote sensing techniques on aerial photographs and Landsat TM/ETM+ imagery for the detection and monitoring of coastal erosion in False Bay, South ...

  9. Estimation of Airborne Lidar-Derived Tropical Forest Canopy Height Using Landsat Time Series in Cambodia

    Directory of Open Access Journals (Sweden)

    Tetsuji Ota

    2014-11-01

    Full Text Available In this study, we test and demonstrate the utility of disturbance and recovery information derived from annual Landsat time series to predict current forest vertical structure (as compared to the more common approaches, that consider a sample of airborne Lidar and single-date Landsat derived variables. Mean Canopy Height (MCH was estimated separately using single date, time series, and the combination of single date and time series variables in multiple regression and random forest (RF models. The combination of single date and time series variables, which integrate disturbance history over the entire time series, overall provided better MCH prediction than using either of the two sets of variables separately. In general, the RF models resulted in improved performance in all estimates over those using multiple regression. The lowest validation error was obtained using Landsat time series variables in a RF model (R2 = 0.75 and RMSE = 2.81 m. Combining single date and time series data was more effective when the RF model was used (opposed to multiple regression. The RMSE for RF mean canopy height prediction was reduced by 13.5% when combining the two sets of variables as compared to the 3.6% RMSE decline presented by multiple regression. This study demonstrates the value of airborne Lidar and long term Landsat observations to generate estimates of forest canopy height using the random forest algorithm.

  10. Improving automated disturbance maps using snow-covered landsat time series stacks

    Science.gov (United States)

    Kirk M. Stueve; Ian W. Housman; Patrick L. Zimmerman; Mark D. Nelson; Jeremy Webb; Charles H. Perry; Robert A. Chastain; Dale D. Gormanson; Chengquan Huang; Sean P. Healey; Warren B. Cohen

    2012-01-01

    Snow-covered winter Landsat time series stacks are used to develop a nonforest mask to enhance automated disturbance maps produced by the Vegetation Change Tracker (VCT). This method exploits the enhanced spectral separability between forested and nonforested areas that occurs with sufficient snow cover. This method resulted in significant improvements in Vegetation...

  11. A COMPARISON OF HAZE REMOVAL ALGORITHMS AND THEIR IMPACTS ON CLASSIFICATION ACCURACY FOR LANDSAT IMAGERY

    Directory of Open Access Journals (Sweden)

    Yang Xiao

    Full Text Available The quality of Landsat images in humid areas is considerably degraded by haze in terms of their spectral response pattern, which limits the possibility of their application in using visible and near-infrared bands. A variety of haze removal algorithms have been proposed to correct these unsatisfactory illumination effects caused by the haze contamination. The purpose of this study was to illustrate the difference of two major algorithms (the improved homomorphic filtering (HF and the virtual cloud point (VCP for their effectiveness in solving spatially varying haze contamination, and to evaluate the impacts of haze removal on land cover classification. A case study with exploiting large quantities of Landsat TM images and climates (clear and haze in the most humid areas in China proved that these haze removal algorithms both perform well in processing Landsat images contaminated by haze. The outcome of the application of VCP appears to be more similar to the reference images compared to HF. Moreover, the Landsat image with VCP haze removal can improve the classification accuracy effectively in comparison to that without haze removal, especially in the cloudy contaminated area

  12. Calibration and Validation of Landsat Tree Cover in the Taiga−Tundra Ecotone

    Directory of Open Access Journals (Sweden)

    Paul Mannix Montesano

    2016-06-01

    Full Text Available Monitoring current forest characteristics in the taiga−tundra ecotone (TTE at multiple scales is critical for understanding its vulnerability to structural changes. A 30 m spatial resolution Landsat-based tree canopy cover map has been calibrated and validated in the TTE with reference tree cover data from airborne LiDAR and high resolution spaceborne images across the full range of boreal forest tree cover. This domain-specific calibration model used estimates of forest height to determine reference forest cover that best matched Landsat estimates. The model removed the systematic under-estimation of tree canopy cover >80% and indicated that Landsat estimates of tree canopy cover more closely matched canopies at least 2 m in height rather than 5 m. The validation improved estimates of uncertainty in tree canopy cover in discontinuous TTE forests for three temporal epochs (2000, 2005, and 2010 by reducing systematic errors, leading to increases in tree canopy cover uncertainty. Average pixel-level uncertainties in tree canopy cover were 29.0%, 27.1% and 31.1% for the 2000, 2005 and 2010 epochs, respectively. Maps from these calibrated data improve the uncertainty associated with Landsat tree canopy cover estimates in the discontinuous forests of the circumpolar TTE.

  13. Assessment of Forest Degradation in Vietnam Using Landsat Time Series Data

    Directory of Open Access Journals (Sweden)

    James E. Vogelmann

    2017-07-01

    Full Text Available Landsat time series data were used to characterize forest degradation in Lam Dong Province, Vietnam. We conducted three types of image change analyses using Landsat time series data to characterize the land cover changes. Our analyses concentrated on the timeframe of 1973–2014, with much emphasis on the latter part of that range. We conducted a field trip through Lam Dong Province to develop a better understanding of the ground conditions of the region, during which we obtained many photographs of representative forest sites with Global Positioning System locations to assist us in our image interpretations. High-resolution Google Earth imagery and Landsat data of the region were used to validate results. In general, our analyses indicated that many land-use changes have occurred throughout Lam Dong Province, including gradual forest to non-forest transitions. Recent changes are most marked along the relatively narrow interfaces between agricultural and forest areas that occur towards the boundaries of the province. One important observation is that the most highly protected national reserves in the region have not changed much over the entire Landsat timeframe (1972–present. Spectral changes within these regions have not occurred at the same levels as those areas adjacent to the reserves.

  14. Monitoring of suspended sediment variation using Landsat and MODIS in the Saemangeum coastal area of Korea.

    Science.gov (United States)

    Min, Jee-Eun; Ryu, Joo-Hyung; Lee, Seok; Son, Seunghyun

    2012-02-01

    Suspended sediment concentration (SS) is an important indicator of marine environmental changes due to natural causes such as tides, tidal currents, and river discharges, as well as human activities such as construction in coastal regions. In the Saemangeum area on the west coast of Korea, construction of a huge tidal dyke for land reclamation has strongly influenced the coastal environment. This study used remotely sensed data to analyze the SS changes in coastal waters caused by the dyke construction. Landsat and MODIS satellite images were used for the spatial analysis of finer patterns and for the detailed temporal analysis, respectively. Forty Landsat scenes and 105 monthly composite MODIS images observed during 1985-2010 were employed, and four field campaigns (from 2005 to 2006) were performed to verify the image-derived SS. The results of the satellite data analyses showed that the seawater was clear before the dyke construction, with SS values lower than 20 g/m(3). These values increased continuously as the dyke construction progressed. The maximum SS values appeared just before completion of the fourth dyke. Values decreased to below 5 g/m(3) after dyke construction. These changes indicated tidal current modification. Some eddies and plumes were observed in the images generated from Landsat data. Landsat and MODIS can reveal that coastal water turbidity was greatly reduced after completion of the construction. Copyright © 2011 Elsevier Ltd. All rights reserved.

  15. Change detection of bare areas in the Xolobeni region, South Africa using Landsat NDVI

    CSIR Research Space (South Africa)

    Singh, RG

    2015-06-01

    Full Text Available to provide some information on the inter-relationship between vegetated classes and bare areas. Normalised Difference Vegetation Index (NDVI) data derived from multi-temporal Landsat 5 imagery has formed the baseline information for this study. A density...

  16. Downscaling of Aircraft, Landsat, and MODIS-bases Land Surface Temperature Images with Support Vector Machines

    Science.gov (United States)

    High spatial resolution Land Surface Temperature (LST) images are required to estimate evapotranspiration (ET) at a field scale for irrigation scheduling purposes. Satellite sensors such as Landsat 5 Thematic Mapper (TM) and Moderate Resolution Imaging Spectroradiometer (MODIS) can offer images at s...

  17. ANALISIS KARAKTERISTIK SPASIAL KABUPATEN TAKALAR BERBASIS GIS DAN REMOTE SENSING MENGGUNAKAN CITRA LANDSAT

    OpenAIRE

    Sidra, Sidra

    2017-01-01

    Metode penginderaan jauh digunakan untuk mengumpulkan informasi tentang suatu obyek dipermukaan bumi yang kemudian akan dianalisis. Metode remote sensing ini akan menghasilkan citra. Pemanfaatan citra landsat khususnya digunakan untuk mengidentifikasi indeks vegetasi dan indeks air disuatu wilayah. Sistem informasi geografis mempunyai kemampuan dalam mengolah informasi yang kemudian akan menghasilkan data bereferensi geografis atau geospasial. Data tersebut dapat digunakan untuk menganalisis...

  18. a Landsat Time-Series Stacks Model for Detection of Cropland Change

    Science.gov (United States)

    Chen, J.; Chen, J.; Zhang, J.

    2017-09-01

    Global, timely, accurate and cost-effective cropland monitoring with a fine spatial resolution will dramatically improve our understanding of the effects of agriculture on greenhouse gases emissions, food safety, and human health. Time-series remote sensing imagery have been shown particularly potential to describe land cover dynamics. The traditional change detection techniques are often not capable of detecting land cover changes within time series that are severely influenced by seasonal difference, which are more likely to generate pseuso changes. Here,we introduced and tested LTSM ( Landsat time-series stacks model), an improved Continuous Change Detection and Classification (CCDC) proposed previously approach to extract spectral trajectories of land surface change using a dense Landsat time-series stacks (LTS). The method is expected to eliminate pseudo changes caused by phenology driven by seasonal patterns. The main idea of the method is that using all available Landsat 8 images within a year, LTSM consisting of two term harmonic function are estimated iteratively for each pixel in each spectral band .LTSM can defines change area by differencing the predicted and observed Landsat images. The LTSM approach was compared with change vector analysis (CVA) method. The results indicated that the LTSM method correctly detected the "true change" without overestimating the "false" one, while CVA pointed out "true change" pixels with a large number of "false changes". The detection of change areas achieved an overall accuracy of 92.37 %, with a kappa coefficient of 0.676.

  19. Assessment of coastal wetland resources of central west coast, India, using LANDSAT data

    Digital Repository Service at National Institute of Oceanography (India)

    Jagtap, T.G.; Naik, S.; Nagle, V.L.

    The part of central west coast (Maharashtra and Goa) of India has been classified and quantified for coastal wetlands using LANDSAT data of 1985-86. The classification accuracy of the maps and area estimates achieved was 84% at 90% confidence level...

  20. Continental-Scale Mapping of Adelie Penguin Colonies from Landsat Imagery

    Science.gov (United States)

    Schwaller, Mathew R.; Southwell, Colin; Emmerson, Louise

    2013-01-01

    Breeding distribution of the Adlie penguin, Pygoscelis adeliae, was surveyed with Landsat-7 Enhanced Thematic Mapper Plus (ETM+) data in an area covering approximately 330 of longitude along the coastline of Antarctica.An algorithm was designed to minimize radiometric noise and to retrieve Adlie penguin colony location and spatial extent from the ETM+data. In all, 9143 individual pixels were classified as belonging to an Adlie penguin colony class out of the entire dataset of 195 ETM+ scenes, where the dimension of each pixel is 30 m by 30 m,and each scene is approximately 180 km by 180 km. Pixel clustering identified a total of 187 individual Adlie penguin colonies, ranging in size from a single pixel (900 sq m) to a maximum of 875 pixels (0.788 sq km). Colony retrievals have a very low error of commission, on the order of 1% or less, and the error of omission was estimated to be 3% to 4% by population based on comparisons with direct observations from surveys across east Antarctica. Thus, the Landsat retrievals successfully located Adlie penguin colonies that accounted for 96 to 97% of the regional population used as ground truth. Geographic coordinates and the spatial extent of each colony retrieved from the Landsat data are available publically. Regional analysis found several areas where the Landsat retrievals suggest populations that are significantly larger than published estimates. Six Adlie penguin colonies were found that are believed to be previously unreported in the literature.