1,356,693 research outputs found

    Mobility enhancement and assessment for a visual prosthesis

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    This paper investigates methods of processing mobility related static images to enhance the effectiveness of a visual prosthesis system. Eight images were processed into 50x50 pixel binary, greyscale, Sobel and Canny edge detected images. 10 subjects were asked 5 mobility related identification tasks for each (randomly ordered) image. Results indicate that edge detection may be useful at this resolution. However, there was not a significant difference found between the results achieved using the Canny and Sobel algorithms. These results support the development of an adaptive device. A mobility display framework has been proposed to assist in this development. Future work will focus on processing image sequences and the development of a visual prosthesis simulation device

    Story 1. About Ngutapa

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    Historia de Ngutapa, padre de Yoí e Ípi y primer inmortal creado por Mowíchina. Narración por Jorge Manduca en la Comunidad Indígena Arara, cuatro de noviembre de 1992. Este casete formó parte de la colección de Hugo Camacho, quien trabajó en el Proyecto de Atención Integral a la Familia Indígena del ICBF. La grabación contiene los lados A y B del casete.Story of Ngutapa, father of Yoí and Ípi. He is the first immortal created by Mowíchina. Narrated by Jorge Manduca in the Arara Indigenous Community, November 4, 1992. This cassette was part of the collection of Hugo Camacho, who worked in the Proyecto de Atención Integral a la Familia Indígena of the ICBF. The recording contains sides A and B of the cassette.Audacit

    Remote sensing for environmental assessment in the context of humanitarian emergencies: a case study of Ethiopia, Gambella region, in Africa

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    The improvement in remote sensing techniques to obtain environmental information, coupled with a significant expansion in the number of refugee camps, in their size and longevity, and in their impacts on natural resources, has increased the need for better information about the nature of those resources and their resilience to human demands. Large and fast-growing refugee camps place heavy demands on areas to locate new arrivals and may have long-lasting impacts on land cover and land use, forest degradation, environmental services and social dynamics. In this context, the role of remote sensing is becoming increasingly popular in the field of humanitarian action, as it is an independent and reliable source of information and allows both a quick response to emergencies and the monitoring of gradual changes, especially when field observations in the area are not possible. This study was chosen to adhere to the “traditional” meaning of refugee and managed settlements in Africa, under the UNHCR mandate. As a result, certain groups, such as returnees or internally displaced people, as well as city slums and locations of dispersed or informal settlements, were left out of the selection process. The main goal of this study is to use remote sensing to analyse significant land cover changes relatable to refugee camp settlements. The Gambela region of Ethiopia was selected as a region of interest. Already in 2016, several sources reported Ethiopia to be within the top 6th refugee-hosting country worldwide, with the Gambela region having rich natural resources but hosting the country's largest refugee population. Most refugees are from South Sudan and live in seven refugee camps. The four biggest camps, Nguenyyiel, Tierkidi, Jewi, and Kule, were selected to conduct the study. A comprehensive and multidisciplinary literary review investigated existing RS application studies, historical developments, and social and state patterns. C-band synthetic aperture radar (SAR) from Copernicus Sentinel-1 and USGS Landsat-8, Level 2, Collection 2 imagery are used to compare and analyse vegetation cover and land use and land cover changes (LULCC) over a ten-year time series analysis period. Despite several limitations found in assessing optical imagery, SAR data was revealed to be a good alternative. These last have been pre-processed, including radiometric calibration, geocoding, and excluding speckle filtering. A composite time series raster image with a 10-meter resolution was created to display an RGB layer representing buildings and shelters’ presence over the years. As a result, this study found a correlation between the trend of SAR backscatter values and refugee population growth, paving the way for future investigations

    Tobacco Hornworm Manduca sexta (Linnaeus) (Insecta: Lepidoptera: Sphingidae)

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    The tobacco hornworm, Manduca sexta (L.), is a common pest of plants in the family Solanaceae, which includes tobacco, tomato, pepper, eggplant, and various ornamentals and weeds (del Campo and Renwick 1999). Caterpillars in the family Sphingidae are known as hornworms, due to their worm-like body shape and the presence of a small, pointed “horn” at their posterior (Figure 1). The adult stage of Manduca sexta is a heavy-bodied moth that resembles a hummingbird, and Manduca adults are commonly referred to as hawkmoths or hummingbird moths (Figure 2). The larval stage (hornworm) of this species is more often encountered, as it is resides on the host plant during the day and can cause significant defoliation of economically important crops. [...

    Tobacco Hornworm Manduca sexta (Linnaeus) (Insecta: Lepidoptera: Sphingidae)

    No full text
    The tobacco hornworm, Manduca sexta (L.), is a common pest of plants in the family Solanaceae, which includes tobacco, tomato, pepper, eggplant, and various ornamentals and weeds (del Campo and Renwick 1999). Caterpillars in the family Sphingidae are known as hornworms, due to their worm-like body shape and the presence of a small, pointed “horn” at their posterior (Figure 1). The adult stage of Manduca sexta is a heavy-bodied moth that resembles a hummingbird, and Manduca adults are commonly referred to as hawkmoths or hummingbird moths (Figure 2). The larval stage (hornworm) of this species is more often encountered, as it is resides on the host plant during the day and can cause significant defoliation of economically important crops. [...

    Observations on Flights of Released Tobacco Hornworm Moths, Manduca Sexta (Johannson) Order Lepidoptera: Family Sphingidae

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    Author Institution: 203 Mooreland Drive, Oxford, North Carolina 27565STEWART, PAUL A. Observations on Flights of Released Tobacco Hornworm Moths, Manduca- sexla (johannson) Order Lepidoptera; Family Sphingi'dae. Ohio J. Sci. 75(2): 83, 1975

    Systématique et répartition des Manduca du groupe lefeburei (Guérin) (Lepidoptera, Sphingidae)

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    Summary. -The Manduca species of the Manduca lefeburei(Guérin) group are revised. The author proposes two keys of determination, one based on the habitus and the other on the genitalia. The subspecies Manduca prestoni (Gehlen) of Manduca incisa (Walker) established by Kernbach is raised to species level. The status of Manduca bossardi (Gehlen) and Manduca incisa pallidula (Daniel) are discussed. The first is here treated as a subspecies of Manduca lefeburei, the second is put into synonymy with Manduca lefeburei bossardi. A distribution map for these five taxa is established.Résumé. -L'auteur révise les Manduca du groupe Manduca lefeburei (Guérin). Il propose deux clés de détermination des quatre espèces du groupe, l'une basée sur l'habitus et l'autre sur les armatures génitales. La sous-espèce Manduca prestoni (Gehlen) de Manduca incisa (Walker) définie par Kernbach est rehaussée au rang de bonne espèce. Les statuts des Manduca bossardi (Gehlen) et Manduca incisa pallidula (Daniel) sont discutés. Le premier étant traité ici comme une sous-espèce de Manduca lefeburei, le second placé en synonymie de Manduca lefeburei bossardi. Une carte de répartition de ces cinq taxons est établie.Haxaire Jean. Systématique et répartition des Manduca du groupe lefeburei (Guérin) (Lepidoptera, Sphingidae). In: Bulletin de la Société entomologique de France, volume 100 (3), août 1995. pp. 277-286

    Lullaby 3

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    Arrullo cantado por la abuela Agustina Manduca el 27 de julio de 1996 en la Comunidad Indígena de Arara (Amazonas, Colombia) como parte del Proyecto de Atención Indígena del Instituto Colombiano de Bienestar Familiar bajo la dirección de Hugo Armando Camacho y equipo de trabajo.Lullaby sung by Agustina Manduca on July 27, 1996 in the Indigenous Community of Arara (Amazonas, Colombia) as part of the Indigenous Attention Project of the Colombian Institute of Family Welfare under the direction of Hugo Armando Camacho and his team.Audacit

    Tobacco Hornworm Manduca sexta (Linnaeus) (Insecta: Lepidoptera: Sphingidae)

    No full text
    The tobacco hornworm, Manduca sexta (L.), is a common pest of plants in the family Solanaceae, which includes tobacco, tomato, pepper, eggplant, and various ornamentals and weeds (del Campo and Renwick 1999). Caterpillars in the family Sphingidae are known as hornworms, due to their worm-like body shape and the presence of a small, pointed “horn” at their posterior (Figure 1). The adult stage of Manduca sexta is a heavy-bodied moth that resembles a hummingbird, and Manduca adults are commonly referred to as hawkmoths or hummingbird moths (Figure 2). The larval stage (hornworm) of this species is more often encountered, as it is resides on the host plant during the day and can cause significant defoliation of economically important crops. [...
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