Abstract
We present an optical imaging system based on compressive sensing (CS) along with its principal mathematical aspects. Although CS is undergoing significant advances and empowering many discussions and applications throughout various fields, this article focuses on the analysis of a single-pixel camera. This work was the core for the development of a single-pixel camera approach based on active illumination. Therefore, the active illumination concept is described along with the experimental results, which were very encouraging toward the development of compressive-sensing-based cameras for various applications, such as pixel-level programmable gain imaging. (C) 2011 Optical Society of America

Abstract
In this paper, direct UV-laser writing was used to produce channel waveguides and diffraction gratings on thin films of siliceous-based organic-inorganic hybrid materials. The optical quality of the films surface was studied by light scattering measurements. The produced Y-power splitters, optical filters and Fabry-Perot cavities were experimentally characterized for propagation in the near infrared spectral region.

Abstract
This paper presents a general overview about the system operation, management and control following a large scale integration of renewable energy sources, focusing in particular the wind generation, both onshore and offshore. Regarding the operation of distribution networks, the integration of renewable energy sources and other distributed generation systems requires the adoption of active control and management structures. These structures will contribute to extend intelligence from the transmission to the distribution networks, aiming to change the operation paradigm from passive towards the smart grids vision for European networks of energy. The MicroGrid concept plays a key role in this context and has been exploited in order to support the progressive integration of electric vehicles, trying to avoid grid reinforcements. © 2011 IEEE.

Abstract
Teleradiology is the acquisition and transmission of radiologic images and respective diagnosis from a different location where the patient performed the exam. A teleradiology system was implemented in the ACES Alto Tras-os-Montes I Nordeste, in the Northeast of Portugal in 2008, aiming to overcome the shortage of this healthcare resource and expertise in the region. The main objective of this paper is to assess users' satisfaction with the use of the teleradiology system presented above and investigate the main changes and impact that this system had for the patients and healthcare professionals involved in the process. Focus groups were applied and allowed to ascertaining the users' perspectives regard the system. The main characteristic of the participants was that they used the system to perform their work on a daily basis or they benefited from its use. A focus group was performed for each of the three categories: Radiology Technicians, Primary Care Physicians and Patients, and they lasted one hour on average. Both healthcare professionals and patients have benefited with the introduction of the teleradiology system. The methodology applied allowed to better explore why it is so for each different group and for the various aspects of the system.

Abstract

Abstract
The human possibility of becoming old - the so called Nestor Effect -, as an evolutionary adaptation, is beneficial only if there is some preservation of a certain cognitive character. Differing neuropathological conditions, such as neurodegenerative diseases, due to an abnormal aggregation of certain proteins, may induce chronic inflammatory processes. As so, physical activity increases aerobic fitness and the brain's blood flow capacity, contributing to the decrease of the central nervous system's chronic inflammation, promoting neuroplasticity, and neural circuitry's reorganisation.