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On 11 November 1994, 26 preadolescent girls, 2 adult supervisors and seven dogs were sleeping in a tent in rural South Africa when it was hit by lightning. Four of the girls and four of the dogs were killed. What follows is a nineteen year follow-up study of the survivors. Of the 22 surviving young women, 11 responded. Clinical and psychological symptoms are reported in this paper which adds to the...
Recent changes of paradigm in power systems opened the opportunity to the active participation of new players. The small and medium players gain new opportunities while participating in demand response programs. This paper explores the optimal resources scheduling in two distinct levels. First, the network operator facing large wind power variations makes use of real time pricing to induce consumers...
We propose an efficient scheme for blind image restoration that takes advantage of recent advances in blind algorithms used for equalization of communication channels. It is based on a blind adaptive algorithm that interprets images with more than two grayscale levels as images with only two grayscale levels. In order to take a greater advantage of the adaptive scheme, we also propose some changes...
An accurate computer model was created for the extraction of the quality factor, Q, and the sensitivity of piezoelectric pressure transducer. The quality factor is a key parameter to determine the transducer resolution. The effect of viscosity loss and geometrical factors, such as: thickness, diameter, and concavity (plano-convex and bi-convex) are simulated in AT-cut quartz and Hi-Q cut gallium phosphate...
The three-level (3L) neutral-point-clamped (NPC) voltage-source (VSC) converter has been the standard solution in medium-voltage range for industrial applications. Recently, the NPC converter structure was improved by adding two extra active switches per phase leg, thus overcoming one of its main drawbacks: the unequal power loss among the power semiconductors. The resulting structure became known...
Network interfaces are present in a variety of battery powered computer systems, such as notebooks, ultrabooks, tablets and mobile phones. Considering that the battery life is still a constraint, there are opportunities for power management by reducing the power consumption of idle network interfaces. In this work, a dynamic timeout power policy for network interfaces is presented, incorporating workload...
Adaptive combination of adaptive filters is an attractive approach that improves the performance attainable with individual filters. However, the computational cost associated with the operation of several filters in parallel could be unaffordable for some applications. In this paper, we propose a scheme with reduced computational cost for a combination of two adaptive filters with different step...
Energy resource scheduling is becoming increasingly important, such as the use of more distributed generators and electric vehicles connected to the distribution network. This paper proposes a methodology to be used by Virtual Power Players (VPPs), regarding the energy resource scheduling in smart grids and considering day-ahead, hour-ahead and realtime time horizons. This method considers that energy...
The mesh approximation of solid models is an important and necessary step for several applications. Particularly when surfaces with T-junctions are presented in the model. In this situation, the surface boundaries can have different number of segment approximations. Such a surface can be filled by an irregular mesh. The paving algorithm is one of the best mesh generators, however its implementation...
This paper addresses the distributed execution of Input-Output Place Transition Petri nets (IOPT-nets) models through a network of distributed controllers by providing platform independent modules for communication. Each controller is associated with an IOPT-net sub-model and a set of static communication modules characterized dynamically by the communication meta-model. The sub-models use communication...
This paper addresses the distributed execution of IOPT Petri nets models supported by a network of distributed controllers. Each controller is associated with a sub-model. Submodels use communication channels to exchange events allowing global evolution. Whenever controllers are interconnected through some kind of network, communication channels are implemented by communication nodes associated with...
CMOS RC oscillators have low area, can be built with a low cost technology, and have a wide tuning range, but they have higher phase-noise than LC oscillators. This can be overcome by synchronizing the oscillator by injection-locking with an low phase-noise external source. We present here an experimental study of injection-locking in an RC two-integrator oscillator. First and second harmonic injection...
RC oscillators have lower cost and higher tuning range than LC oscillators. However, their phase noise performance is poor and in the case of the relaxation oscillator it is also far from the theoretical optimum. In this paper we present a new circuit of a quadrature relaxation oscillator with faster switching and high amplitude output signal to improve the FoM. The sizing of a prototype in a 130nm...
The problem of finding admissible tunings for a PID-controller for automatic neuromuscular blockade drug administration in closed-loop anesthesia is considered. A conventional compartmental pharmacokinetic/pharmacodynamic model with Wiener structure under a PID feedback is analyzed in order to discern the safe intervals of the controller parameters that are free of complex dynamics phenomena. The...
This paper presents a multi-functional automatic control approach for total intravenous anesthesia (TIVA) administration, valid for several drug combinations and able to run autonomously during the three main phases of general anesthesia: induction, maintenance and recovery. While using this standalone TIVA module, named as amTIVA, the anesthesiologist has the crucial role of system supervisor. Bolus...
This work presents a probabilistic constructive heuristic to design the roadside infrastructure for information dissemination in vehicular networks. We formulate the problem as a Probabilistic Maximum Coverage Problem (PMCP) and we use them to maximize the number of vehicles in contact with the infrastructure. We compare our approach to a non-probabilistic MCP in simulated urban areas considering...
High voltage high power semiconductor devices are being used for grid integration of renewable energy sources. 1200V, 100A SiC Mosfets, 10 kV SiC Mosfets and 10kV SiC JBS Diodes have proven to be beneficial for high voltage application. High Voltage SiC devices enable high switching frequency operation thus reducing size of passive elements. Scope of this paper focuses on an alternative approach for...
The Angra Neutrino Project aims to design and assemble an antineutrinos detection device to perform the monitoring of the Angra dos Reis nuclear reactor activity. Nuclear reactors are intense sources of antineutrinos, and the thermal power released in the fission process is directly related to the flow-rate of these particles. The antineutrino production also provides valuable information on the nuclear...
Due to their unique characteristics, optical sensor networks have found application in many fields, such as in Civil and Geotechnical Engineering, Aerospace, Energy and Oil & Gas Industries. Monitoring solutions based on this technology have proven particularly cost effective and can be applied to large scale structures where hundreds of sensors must be deployed for long term measurement of different...
Automated tracking of axonal neurotransmitter vesicles is a challenging problem in neuroscience. The present vesicle tracking is typically performed manually over confocal microscopy images. NeuronDynamics is a method designed to automate and speed-up the characterization of global vesicle movement in neurons while yielding high accuracy and precision results (similar or better than expert clinicians)...
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