1000 resultados para Gronniosaw, James Albert Ukawsaw.


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Coral reef maps at various spatial scales and extents are needed for mapping, monitoring, modelling, and management of these environments. High spatial resolution satellite imagery, pixel <10 m, integrated with field survey data and processed with various mapping approaches, can provide these maps. These approaches have been accurately applied to single reefs (10-100 km**2), covering one high spatial resolution scene from which a single thematic layer (e.g. benthic community) is mapped. This article demonstrates how a hierarchical mapping approach can be applied to coral reefs from individual reef to reef-system scales (10-1000 km**2) using object-based image classification of high spatial resolution images guided by ecological and geomorphological principles. The approach is demonstrated for three individual reefs (10-35 km**2) in Australia, Fiji, and Palau; and for three complex reef systems (300-600 km**2) one in the Solomon Islands and two in Fiji. Archived high spatial resolution images were pre-processed and mosaics were created for the reef systems. Georeferenced benthic photo transect surveys were used to acquire cover information. Field and image data were integrated using an object-based image analysis approach that resulted in a hierarchically structured classification. Objects were assigned class labels based on the dominant benthic cover type, or location-relevant ecological and geomorphological principles, or a combination thereof. This generated a hierarchical sequence of reef maps with an increasing complexity in benthic thematic information that included: 'reef', 'reef type', 'geomorphic zone', and 'benthic community'. The overall accuracy of the 'geomorphic zone' classification for each of the six study sites was 76-82% using 6-10 mapping categories. For 'benthic community' classification, the overall accuracy was 52-75% with individual reefs having 14-17 categories and reef systems 20-30 categories. We show that an object-based classification of high spatial resolution imagery, guided by field data and ecological and geomorphological principles, can produce consistent, accurate benthic maps at four hierarchical spatial scales for coral reefs of various sizes and complexities.

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A mosaic of two WorldView-2 high resolution multispectral images (Acquisition dates: October 2010 and April 2012), in conjunction with field survey data, was used to create a habitat map of the Danajon Bank, Philippines (10°15'0'' N, 124°08'0'' E) using an object-based approach. To create the habitat map, we conducted benthic cover (seafloor) field surveys using two methods. Firstly, we undertook georeferenced point intercept transects (English et al., 1997). For ten sites we recorded habitat cover types at 1 m intervals on 10 m long transects (n= 2,070 points). Second, we conducted geo-referenced spot check surveys, by placing a viewing bucket in the water to estimate the percent cover benthic cover types (n = 2,357 points). Survey locations were chosen to cover a diverse and representative subset of habitats found in the Danajon Bank. The combination of methods was a compromise between the higher accuracy of point intercept transects and the larger sample area achievable through spot check surveys (Roelfsema and Phinn, 2008, doi:10.1117/12.804806). Object-based image analysis, using the field data as calibration data, was used to classify the image mosaic at each of the reef, geomorphic and benthic community levels. The benthic community level segregated the image into a total of 17 pure and mixed benthic classes.

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Este artículo describe una propuesta de innovación docente basada en la corriente educativa de la Educación para el Desarrollo, así como la mejora de Competencia Comunicativa en L2 y de las Competencias Literarias e Interculturales por medio de un taller diseñado para tal fin. El propósito de este artículo es doble: por un lado mostrar las posibilidades que ofrece el Taller de Escritura e Ilustración Creativa para el desarrollo de las Competencias Literaria, Intercultural y Comunicativa en L2. Se muestra cómo el taller cumple con las directrices marcadas por la Educación para el Desarrollo que se describe en el marco teórico. El segundo objetivo es narrar cómo se han organizado, coordinado e implementado el Taller de Escritura e Ilustración Creativa en la Universidade Federal do Amazonas en Manaos (Brasil), basándose en la metodología del aprendizaje basado en tareas, y cómo se ha conseguido (i) promover la creación de puentes para la consolidación de las relaciones bilaterales entre universidades; (ii) motivar la colaboración científica con los centros brasileños que cuentan con un departamento de español, y (iii) emplear y crear herramientas que permitan incluir la Educación para el Desarrollo.

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A letter from James Wilson, Park Superintendent to Albert D. Shaw in the year 1892. Wilson describes plans to produce hydroelectric power using Niagara Falls. He details advantages to the plan in this five page correspondence with Shaw.

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Published in 1914 under title: A great peace maker: the diary of James Gallatin.

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Published in 1914 under title: A great peace maker: the diary of James Gallatin.