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Publicações

2010

Lowering the low-energy threshold of xenon detectors

Autores
Sorensen, P; Angle, J; Aprile, E; Arneodo, F; Baudis, L; Bernstein, A; Bolozdynya, A; Coelho, LCC; Dahl, CE; DeViveiros, L; Ferella, AD; Fernandes, LMP; Fiorucci, S; Gaitskell, RJ; Giboni, KL; Gomez, R; Hasty, R; Kastens, L; Kwong, J; Lopes, JAM; Madden, N; Manalaysay, A; Manzur, A; McKinsey, DN; Monzani, ME; Ni, K; Oberlack, U; Orboeck, J; Plante, G; Santorelli, R; Dos Santos, JMF; Schulte, S; Shagin, P; Shutt, T; Winant, C; Yamashita, M;

Publicação
Proceedings of Science

Abstract
We show that the energy threshold for nuclear recoils in the XENON10 dark matter search data can be lowered to ~ 1 keV, by using only the ionization signal. In other words, we make no requirement that a valid event contain a primary scintillation signal. We therefore relinquish incident particle type discrimination, which is based on the ratio of ionization to scintillation in liquid xenon. This method compromises the detector's ability to precisely determine the z coordinate of a particle interaction. However, we show for the first time that it is possible to discriminate bulk events from surface events based solely on the ionization signal. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

2010

EXPERIMENTS WITH BOLOGNA CURRICULUM IN A HIGH EDUCATION ENGINEERING SCHOOL

Autores
Marques, BP; Martins, AM;

Publicação
3RD INTERNATIONAL CONFERENCE OF EDUCATION, RESEARCH AND INNOVATION (ICERI2010)

Abstract

2010

Virtual Factory Framework: An innovative approach to support the planning and optimization of the next generation factories

Autores
Azevedo, A; Francisco, RP; Bastos, J; Almeida, A;

Publicação
IFAC Proceedings Volumes (IFAC-PapersOnline)

Abstract
Industrial managers are in the expectation that the new generation factories bring more competitiveness to the manufacturing companies through innovative approaches, methods and tools that support the factory planning process. The concept of "factory as a product" perceives the factory as a complex long life product introducing design advantages for factory planning and optimization, seeking to improve quality, reduce ramp-up, product delivery and overall reduce time and costs. In order to attain these objectives, there is an urgent need for an innovative and suitable Virtual Factory Framework to structure the development of new generation factories. © 2010 IFAC.

2010

A non-intrusive multi-sensor system for characterizing driver behavior

Autores
Rodrigues, JGP; Vieira, F; Vinhoza, TTV; Barros, J; Silva Cunha, JP;

Publicação
13th International IEEE Conference on Intelligent Transportation Systems, Funchal, Madeira, Portugal, 19-22 September 2010

Abstract
Understanding driver behavior is critical towards ensuring superior levels of safety and environmental sustainability in intelligent transportation systems. Existing solutions for vital sign extraction are generally intrusive in that they affect the comfort of the driver and may consequently lead to biased observations. Moreover, low-complexity devices such as GPS receivers and the multitude of sensors present in the vehicle are yet to be exploited to the full extent of their capabilities. We present a real-life system that combines wearable non-intrusive heart wave monitors with a wireless enabled computing platform capable of gathering and processing the data streams of multiple in-vehicle sources. Observed variables include electrocardiogram, vehicle location, speed, acceleration, fuel consumption, and pedal position, among others. Preliminary results show that the proposed system is well suited not only for characterizing driver behavior but also for identifying and mapping potentially dangerous road segments and intersections. ©2010 IEEE.

2010

An Innovative Framework Supporting SME Networks for Complex Product Manufacturing

Autores
Carneiro, LM; Almeida, R; Azevedo, AL; Kankaanpaa, T; Shamsuzzoha, AHM;

Publicação
COLLABORATIVE NETWORKS FOR A SUSTAINABLE WORLD

Abstract
Current market dynamics require European SME's to focus on complex products manufacturing and to build non-hierarchical business networks, to assure competitiveness and sustainability. Such trend demands appropriate methods for network formation and management, including reference collaboration processes and supporting ICT tools. This paper presents a framework to support SME's in the creation and management of non-hierarchical networks designed and developed within the European RTD project Net-Challenge. This framework includes methodologies, processes and ICT decision support tools aiming at the efficient creation and management of these networks assuring quick response times and competitive and differentiated offerings.

2010

Suspended-core Fabry-Perot Temperature Sensor Interrogation Through a Dual Wavelength Raman Fiber Laser

Autores
Pinto, AMR; Frazao, O; Santos, JL; Lopez Amo, M; Kobelke, J; Schuster, K;

Publicação
FOURTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

Abstract
The interrogation of a suspended-core Fabry-Perot interferometric cavity through the illumination of a dual wavelength Raman fiber laser is reported. The proposed scheme is based on the use of a dual wavelength source for the generation of two quadrature phase-shifted signals that allows the recovery of the temperature change. The dual wavelength Raman fiber laser is based on fiber Bragg gratings combined with a virtual mirror. The use of this source allows a passive and accurate interrogation of the temperature variation, while taking advantage of the Rayleigh scattering growth as a virtual mirror in the laser.

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