2014
Autores
Martins, MJ; Lopes, F; Fonseca, I; Machado Ferreira, CM; Maciel Barbosa, FM;
Publicação
2014 25TH ANNUAL CONFERENCE EAEEIE (EAEEIE)
Abstract
In this paper, Electrical Engineering Education at the Master level is presented through three perspectives of collaborative projects involving industry and academia. The presented perspectives originate from three Portuguese Higher Education Institutions representing the University, Military Academy and Polytechnic School viewpoints. Throughout the presented projects, an increasing student motivation was observed, driven by the practical experience provided through the industrial sector approach. This cooperation also generates opportunities to develop new perspectives and ideas for follow-on projects as well as innovative academic publications.
2014
Autores
Barbosa, LS; Lumpe, M;
Publicação
SCIENCE OF COMPUTER PROGRAMMING
Abstract
2014
Autores
Agra Amboage, V; Garcia, PJV;
Publicação
ASTRONOMY & ASTROPHYSICS
Abstract
Context. FU Orionis objects are a class of young stars with powerful bursts in luminosity that show evidence of accretion and ejection activity. It is generally accepted that they are surrounded by a Keplerian circumstellar disk and an infalling envelope. The outburst occurs because of a sudden increase in the accretion rate. Aims. We study the regions closer to the central star in order to observe the signs of the accretion and ejection activity. Methods. We present optical observations of the Ha line using the Integral Field Spectrograph OASIS, at the William Herschel Telescope, combined with adaptive optics. Since this technique gives the spectral information for both spatial directions, we carried out a two-dimensional spectro-astrometric study of the signal. Results. We measured a clear spectro-astrometric signal in the north-south direction. The cross-correlation between the spectra showed a spatial distribution in velocity suggestive of scattering by a disk surrounding the star. This would be one of the few spatial inferences of a disk observed in an FU Orionis object. However, to fully understand the observed structure, higher angular and spectral resolution observations are required. V1515 Cyg now appears to be an important object to be observed with a new generation of instruments to increase our knowledge about the disk and outflow structure in FU Orionis objects.
2014
Autores
Silva, E; Silva, N; Morgado, L;
Publicação
HCI (17)
Abstract
In this paper we present an approach that makes possible the staging of choreographies for education and training purposes in potentially any virtual world platform. A choreography is seen here as the description of a set of actions that must or may be executed by a group of participants, including the goals to be achieved and any restrictions that may exist. We present a system-architecture and the formalization of a set of processes that are able to transform a choreography from a platform-independent representation into a specific virtual world platform's representation. We adopt an ontology-based approach with distinct levels of abstraction for capturing and representing multi-actors and multi-domain choreographies to be staged in virtual world platforms with distinct characteristics. Ontologies are characterized according to two complementary dimensions - choreography's domain (independent and dependent) and virtual world platform (independent and dependent) - giving rise to four ontologies. Ontology mappings between these ontologies enable the automatic generation of a choreography for virtually any target virtual world platform, thus reducing the time and effort of the choreography development. © 2014 Springer International Publishing.
2014
Autores
Cabo, M; Fernandes, F; Pereira, T; Fonseca, B; Paredes, H;
Publicação
5TH INTERNATIONAL CONFERENCE ON SOFTWARE DEVELOPMENT AND TECHNOLOGIES FOR ENHANCING ACCESSIBILITY AND FIGHTING INFO-EXCLUSION, DSAI 2013
Abstract
eCall is a car system which automatically calls for help in case of a car accident. The system sends a minimum set of data containing information about the occurrence, such as the geographic location and the vehicle identification. Simultaneously, a 112-voice connection is established. Therefore, the operator at the Public-Safety Answering Point (PSAP) is able to hear what is happening in the vehicle and actually communicate with the occupant(s). However if the occupant(s)'s are deaf or has earing impairments he will not be able to describe the situation using the voice channel established. This paper proposes a solution for this problem extending the SOSPhone concept, developed for enabling universal access to emergency services. A prototype of an application integrated with the eCall that enables the communication with deaf people or earing impaired people is presented. The solution makes use of touch interfaces, embedding the emergency protocols in the user's device, gathering information with an iconographic interface. (C) 2013 The Authors. Published by Elsevier B.V.
2014
Autores
Gordo, P; Amorim, A; Abreu, J; Eisenhauer, F; Anugu, N; Garcia, P; Pfuhl, O; Haug, M; Sturm, E; Wieprecht, E; Perrin, G; Brandner, W; Straubmeier, C; Perraut, K; Duarte Naia, MD; Guimaraes, M;
Publicação
OPTICAL AND INFRARED INTERFEROMETRY IV
Abstract
The GRAVITY Acquisition Camera was designed to monitor and evaluate the optical beam properties of the four ESO/VLT telescopes simultaneously. The data is used as part of the GRAVITY beam stabilization strategy. Internally the Acquisition Camera has four channels each with: several relay mirrors, imaging lens, H-band filter, a single custom made silica bulk optics (i.e. Beam Analyzer) and an IR detector (HAWAII2-RG). The camera operates in vacuum with operational temperature of: 240k for the folding optics and enclosure, 100K for the Beam Analyzer optics and 80K for the detector. The beam analysis is carried out by the Beam Analyzer, which is a compact assembly of fused silica prisms and lenses that are glued together into a single optical block. The beam analyzer handles the four telescope beams and splits the light from the field mode into the pupil imager, the aberration sensor and the pupil tracker modes. The complex optical alignment and focusing was carried out first at room temperature with visible light, using an optical theodolite/alignment telescope, cross hairs, beam splitter mirrors and optical path compensator. The alignment was validated at cryogenic temperatures. High Strehl ratios were achieved at the first cooldown. In the paper we present the Acquisition Camera as manufactured, focusing key sub-systems and key technical challenges, the room temperature (with visible light) alignment and first IR images acquired in cryogenic operation.
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