Cookies Policy
The website need some cookies and similar means to function. If you permit us, we will use those means to collect data on your visits for aggregated statistics to improve our service. Find out More
Accept Reject
  • Menu
Publications

2010

PETTool: A pattern-based GUI testing tool

Authors
Cunha, M; Paiva, ACR; Ferreira, HS; Abreu, R;

Publication
ICSTE 2010 - 2010 2nd International Conference on Software Technology and Engineering, Proceedings

Abstract
Nowadays, the usage of graphical user interfaces (GUIs) in order to ease the interaction with software applications is preferred over command line interfaces. Despite recent advances in software testing, GUIs are still tested in a complete ad-hoc, manual fashion, with little support from (industrial) testing tools. Automating the process of testing GUIs has additional challenges when compared to command-line applications. This paper presents an approach for GUI (semi-automated) testing which uses knowledge of the common behaviour of a GUI. To do so, the most common aspects in a GUI are identified and then a suite of test cases is automatically generated and executed. To validate our approach, we have run it against well known web-based applications, such as GMail. © 2010 IEEE.

2010

All Fiber Mach-Zehnder Interferometer Based on Suspended Twin-Core Fiber

Authors
Frazao, O; Silva, SFO; Viegas, J; Baptista, JM; Santos, JL; Kobelke, J; Schuster, K;

Publication
IEEE PHOTONICS TECHNOLOGY LETTERS

Abstract
An all fiber Mach-Zehnder interferometer using suspended twin-core fiber is described. Due to the birefringence of the fiber cores, two interferometers are obtained when the fiber is illuminated by a polarized light. Applying curvature or temperature to the sensing head, different sensitivities are observed. In order to discriminate curvature from temperature in the suspended twin-core fiber Mach-Zehnder sensor, the matrix method is used.

2010

RAYLEIGH ASSISTED BRILLOUIN EFFECTS IN DISTRIBUTED RAMAN AMPLIFIERS UNDER SATURATED CONDITIONS AT 40 Gb/s

Authors
Rocco Giraldi, MTM; Rocha, AM; Neto, B; Correia, C; Segatto, MEV; Pontes, MJ; Barbero, APL; Costa, JCW; Martinez, MAG; Frazao, O; Baptista, JM; Salgado, HM; Marques, MB; Teixeira, ALJ; Andre, PS;

Publication
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS

Abstract
This article analyzes experimentally the limitations observed in lightwave systems using distributed Raman amplifiers operating under large pump power input conditions. The Brillouin effect is observed as the pump power reaches 1 W. The presence of Brillouin peaks degrades the performance of the system. The Raman amplification occurs in single mode and dispersion compensating fibers, being evaluated in a link at transmission rate of 40 Gb/s. (C) 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1331-1335, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25162

2010

The office-space-allocation problem in strongly hierarchized organizations

Authors
Lopes, R; Girimonte, D;

Publication
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Abstract
The office-space-allocation (OSA) problem will be introduced for strongly hierarchized organizations. In several organizations the relation between the entities is strongly hierarchized, affecting the design and handling of constraints and algorithms used to solve the problem. Moreover there is also an increase in the constraint number when compared to the common test instances. Several well known meta-heuristics were used, new constraints developed, and some variations to the local search algorithms were studied. This article describes the work done and its application to a particular case study, the European Space Research and Technology Center (ESTEC). © 2010 Springer-Verlag Berlin Heidelberg.

2010

Modeling and control of a dragonfly-like robot

Authors
Ferreira, NMF; Couceiro, MS; Tenreiro MacHado, JA;

Publication
Journal of Control Science and Engineering

Abstract
Dragonflies demonstrate unique and superior flight performances than most of the other insect species and birds. They are equipped with two pairs of independently controlled wings granting an unmatchable flying performance and robustness. In this paper, the dynamics of a dragonfly-inspired robot is studied. The system performance is analyzed in terms of time response and robustness. The development of computational simulation based on the dynamics of the robotic dragonfly allows the test of different control algorithms. We study different movements, the dynamics, and the level of dexterity in wing motion of the dragonfly. The results are positive for the construction of flying platforms that effectively mimic the kinematics and dynamics of dragonflies and potentially exhibit superior flight performance than existing flying platforms. Copyright © 2010 Micael S. Couceiro et al.

2010

Singing voice resynthesis using vocal sound libraries

Authors
Fonseca, N; Ferreira, A;

Publication
13th International Conference on Digital Audio Effects, DAFx 2010 Proceedings

Abstract
Although resynthesis may seem a simple analysis/synthesis process, it is a quite complex task, even more when it comes to recreating a singing voice. This paper presents a system whose goal is to start with an original audio stream of someone singing and recreate the same performance (melody, phonetics, dynam-ics) using an internal vocal sound library (choir or solo voice). By extracting dynamics and pitch information, and looking for phonetic similarities between the original audio frames and the frames of the sound library, a completely new audio stream is created. The obtained audio results, although not perfect (mainly due to the existence of audio artifacts), show that this technologi-cal approach may become an extremely powerful audio tool.

  • 3706
  • 4496