Características colorimétricas de una pantalla con tecnología OLED

En este trabajo se han presentado las características colorimétricas de una pantalla OLED, valorando la luminancia, rango dinámico, constancia de primarios, aditividad y dependencia de canales, además de comprobar si puede aplicarse un método físico de caracterización. También, se ha evaluado la gama de color reproducible por este dispositivo considerando el sólido de color teórico asociado al mismo. Se ha comprobado que esta pantalla OLED presenta una buena constancia de cromaticidad de los primarios, pero un nivel de aditividad bajo, hecho que no garantiza que pueda utilizarse el método de caracterización GOG directamente, sino que tenga que realizarse una modificación para asegurar una buena caracterización. También, se ha comprobado que la gama real de colores es más pequeña que la gama de color teórica obtenida a partir del blanco de la pantalla. No obstante, este trabajo es un estudio preliminar que debería completarse con el estudio de diferentes dispositivos basados en tecnología OLED con el fin de conocer adecuadamente sus propiedades colorimétricas.

Measurement of wide frequency range structural microvibrations with a pocket digital camera and sub-pixel techniques

Analysis of vibrations and displacements is a hot topic in structural engineering. Although there is a wide variety of methods for vibration analysis, direct measurement of displacements in the mid and high frequency range is not well solved and accurate devices tend to be very expensive. Low-cost systems can be achieved by applying adequate image processing algorithms. In this paper, we propose the use of a commercial pocket digital camera, which is able to register more than 420 frames per second (fps) at low resolution, for accurate measuring of small vibrations and displacements. The method is based on tracking elliptical targets with sub-pixel accuracy. Our proposal is demonstrated at a 10 m distance with a spatial resolution of 0.15 mm. A practical application over a simple structure is given, and the main parameters of an attenuated movement of a steel column after an impulsive impact are determined with a spatial accuracy of 4 µm.

Measurement of wide frequency range structural microvibrations with a pocket digital camera and sub-pixel techniques

Analysis of vibrations and displacements is a hot topic in structural engineering. Although there is a wide variety of methods for vibration analysis, direct measurement of displacements in the mid and high frequency range is not well solved and accurate devices tend to be very expensive. Low-cost systems can be achieved by applying adequate image processing algorithms. In this paper, we propose the use of a commercial pocket digital camera, which is able to register more than 420 frames per second (fps) at low resolution, for accurate measuring of small vibrations and displacements. The method is based on tracking elliptical targets with sub-pixel accuracy. Our proposal is demonstrated at a 10 m distance with a spatial resolution of 0.15 mm. A practical application over a simple structure is given, and the main parameters of an attenuated movement of a steel column after an impulsive impact are determined with a spatial accuracy of 4 µm.

3D Visual Data-Driven Spatiotemporal Deformations for Non-Rigid Object Grasping Using Robot Hands

Sensing techniques are important for solving problems of uncertainty inherent to intelligent grasping tasks. The main goal here is to present a visual sensing system based on range imaging technology for robot manipulation of non-rigid objects. Our proposal provides a suitable visual perception system of complex grasping tasks to support a robot controller when other sensor systems, such as tactile and force, are not able to obtain useful data relevant to the grasping manipulation task. In particular, a new visual approach based on RGBD data was implemented to help a robot controller carry out intelligent manipulation tasks with flexible objects. The proposed method supervises the interaction between the grasped object and the robot hand in order to avoid poor contact between the fingertips and an object when there is neither force nor pressure data. This new approach is also used to measure changes to the shape of an object’s surfaces and so allows us to find deformations caused by inappropriate pressure being applied by the hand’s fingers. Test was carried out for grasping tasks involving several flexible household objects with a multi-fingered robot hand working in real time. Our approach generates pulses from the deformation detection method and sends an event message to the robot controller when surface deformation is detected. In comparison with other methods, the obtained results reveal that our visual pipeline does not use deformations models of objects and materials, as well as the approach works well both planar and 3D household objects in real time. In addition, our method does not depend on the pose of the robot hand because the location of the reference system is computed from a recognition process of a pattern located place at the robot forearm. The presented experiments demonstrate that the proposed method accomplishes a good monitoring of grasping task with several objects and different grasping configurations in indoor environments.

Railway map of routes to the White Mountains, New Hampshire 1859 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Railway map of routes to the White Mountains, by Harvey Boardman. It was published in 1859 by J.H. Bufford's Lith. Scale not given. Covers New Hampshire, Vermont, Massachusetts, Connecticut, Rhode Island, and portions of Maine, New York, and the province of Quebec, Canada. The image inside the map neatline is georeferenced to the surface of the earth and fit to the USA Contiguous Albers Equal Area Conic projection (Meters). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, railroads, railroad stations, drainage, selected cities, towns, villages, and points of interest (hotels, houses, etc.), state boundaries, and more. Relief shown by hachures. Includes text on routes in margins. This layer is part of a selection of digitally scanned and georeferenced historic maps of New England from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

New York, N.Y. and vicinity, 1899 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: New York City and vicinity, H.M. Wilson, geographer in charge ; triangulation by U.S. Coast and Geodetic Survey ; topography by S.H. Bodfish ... [et al. and] U.S. Coast and Geodetic Survey, N.Y. City Government and the Geological Survey of New Jersey. It was published by U.S.G.S. in 1899. Scale 1:62,500. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator (UTM) Zone 18N NAD83 projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, railroads, drainage, cities and towns, villages, forts, cemeteries, aqueducts, boundaries, and more. Relief is shown with standard contour intervals of 20 feet. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

New York, N.Y. and vicinity, 1961 : Oyster Bay, N.Y.-Conn. (8 Sheet Set) (Raster Image)

This layer is a georeferenced raster image of the United States Geological Survey 7.5 minute topographic sheet map entitled: New York and vicinity : Oyster Bay, N.Y.-Conn., 1955. It is part of an 8 sheet map set covering the metropolitan New York City area. It was published in 1961. Scale 1:24,000. The source map was prepared by the Geological Survey from 1:24,000-scale maps of Bayville 1954, Mamaroneck 1955, Sea Cliff 1954, and Hicksville 1954 7.5 minute quadrangles compiled by the Army Map Service. The Mamaroneck quadrangle was previously compiled by the Geological Survey in 1933 and 1934. Culture revised by the Geological Survey. Hydrography compiled from USC&GS charts 222 (1955), 223 (1954, 1955), and 224 (1954). The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator (UTM) Zone 18N NAD27 projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. USGS maps are typical topographic maps portraying both natural and manmade features. They show and name works of nature, such as mountains, valleys, lakes, rivers, vegetation, etc. They also identify the principal works of humans, such as roads, railroads, boundaries, transmission lines, major buildings, etc. Relief is shown with standard contour intervals of 10 and 20 feet; depths are shown with contours and soundings. Please pay close attention to map collar information on projections, spheroid, sources, dates, and keys to grid numbering and other numbers which appear inside the neatline. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

The current state, problems and future of Germany's air and missile defence. OSW Commentary No. 105, 2013-04-10

From German point of view, air and missile defence systems are of little relevance for the protection of Germany’s territory. However, they are seen as important for conducting ‘out of area’ operations, providing military assistance to allies, and for Germany’s political and military- technical position within NATO. The Bundeswehr has been modernising its air and missile defence systems for several years. The modernisation of very short-range and short-range systems is slightly behind schedule. Plans to modernise the medium-range air and missile defence have been encountering problems since the United States decided to refrain from buying the jointly developed MEADS system. Therefore Germany is currently considering using the results of the MEADS program in the development of its own medium-range air and missile defence system, possibly in co-operation with France and Italy. Such a system would ensure protection against short-range ballistic missiles (up to 1000 km) and might become part of NATO’s ballistic missile defence, replacing the Patriot batteries which Germany is currently operating. Furthermore, Germany could expand its involvement in NATO’s ballistic missile defence in the future by buying or developing system to intercept medium- and intermediate- range ballistic missiles (up to 3000 km and 5500 km). The final decision on this matter has not yet been taken, and will be left for the successive governments of Germany to resolve. It will depend on a number of political, military and financial factors.