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Development of interfaces for impaired users

100%

Moita F. , Oliveira R. , Santos V. , Silva M.

Przegląd Elektrotechniczny

2012

tom R. 88, nr 1a

127-131

This paper presents EyeSEC, a project being conducted in DEE/ISEC in the area of Assistive Technology, which aims to create alternative technologies to compensate for functional limitations and facilitate the independence of elderly and impaired users. The main goal is to merge the data from eye-tracking, provided by vision sensors embedded in eyeglasses, with head movement’s data, provided by inertial sensors. This non-invasive interface that uses low cost sensors can be used to drive electric wheelchairs or as an interface with the computer.

Zaproponowano technologię interfejsu dostosowaną do możliwości użytkowników niepełnosprawnych. Zastosowano czujniki w obudowie okularów umożliwiające śledzenie ruchu oczu. System może być pomocny przy używaniu wózków inwalidzkich, ale także w obsłudze komputera.

Presenting a technique for registering images and range data using a topological representation of a path within an environment

88%

Ferreira F. , Davim L. , Rocha R. , Dias J. , Santos V.

2007

tom Vol. 1, No. 3

47-56

This article presents a novel method to the utilize topological representation of a path, thatpath that is created from sequences of images from digital cameras and sensor data from range sensors. A topological representation of the environment is created by leading the robot around the environment during a familiarisation phaseLeading the robot around the environment during a familiarisation phase creates a topological representation of the environment. While moving down the same path, the robot is able to localise itself within the topological representation that is has been previously created. The principal contribution to the state of the art is that, by using a topological representation of the environment, individual 3D data sets acquired from a set of range sensors need not be registered in a single, [Global] Coordinate Reference System. Instead, 3D point clouds for small sections of the environment are indexed to a sequence of multi-sensor views, of images and range data. Such a registration procedure can be useful in the construction of 3D representations of large environments and in the detection of changes that might occur within these environments.

Patterns of occurrence and distribution of crustacean ichnofossils in the Lower Jurassic-Upper Cretaceous of Atlantic occidental margin basins, Portugal

88%

Carvalho C. , Baucon A. , Rodrigues N. , Santos V. , Viegas P.

Acta Geologica Polonica

2010

tom Vol. 60, no. 1

19-28

Crustacean ichnofossils are most abundant in the stratigraphic record of Portugal. In this paper is presented a study on crustacean ichnoassemblages from the Sinemurian to middle Cenomanian, during the opening and subsequent filling of Atlantic occidental margin basins (Lusitanian Basin and western part of Algarve Basin). Thalassinoides dominates the lagoonal and inner shelf facies from the late Sinemurian at least to the Turonian, generally defining all of the carbonate sequence with its dense, "nodular" ichnofabric since the Late Jurassic. Asequence is described in the lower Barremian of Cabo Espichel in which burrow mazes of Thalassinoides suevicus occur, containing hundreds of Mecochirus rapax as an obrution lagerstatte. The Cretaceous of the Lusitanian Basin is rich in marly limestones mottled with Thalassinoides but almost devoid of Rhizocorallium. Fairly common in dark marls and biomicrites from the Jurassic, Rhizocorallium irregulare locally occurs in dense monospecific fabrics. Slipper-shaped and oblique forms (Rhizocorallium jenense) as well as spiral and lobate forms are rhizocoralliid foraging modifications usually developed in deeper tiers than Thalassinoides and sometimes evidencing bioimprints in Glossifungites preservation. Siliciclastic facies related to rifting subsidence along major fault scarps and fan deltas/braided river depositional systems show pervasive bioturbation with Psilonichnus tubiformis.Another crab-style behaviour ascribed to Macanopsis plataniformis is described for the first time in Portugal, associated with a coarse-grained sandstone episode in a tidal flat setting from the Kimmeridgian, where monospecific brachyuran burrows were developed in a firmground.