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The need for integration of renewable energy to the electricity grid promotes research and development of new energy storage technologies, as well as models and techniques to study them. In this sense, the present work proposes a model to evaluate the benefit that can be harnessed through energy arbitrage in function of a daily hourly rate differentiation. The Vanadium Redox Battery is one of the...
The need for integration of renewable energy to the electricity grid promotes research and development of new energy storage technologies, as well as models and techniques to study them. In this sense, the present work proposes a model to evaluate the benefit that can be harnessed through energy arbitrage in function of a daily hourly rate differentiation. The Vanadium Redox Battery is one of the...
A nanostructured disordered FeAlSn solid solution of Fe-26% Al-2% Sn composition was obtained from elemental Fe, Al and Sn powders using a high-energy ball mill. X-ray diffraction and electron microscopy supported by Mössbauer spectroscopy techniques have been applied to follow changes in the microstructure, phase composition and magnetic properties in dependence on milling time. The transformation...
Due to significant economies of scale, the capital-intensive involved and government regulations that still don't rule a perfect competition environment, the power generation industry is usually organized as a market with oligopolistic competition. In this type of market structure, participating agents implement different strategies or games to exercise market power in order to increase their profits...
The liberalization of electricity markets has significantly changed the perspective of the power generation business. Nowadays, generation companies pursue economic goals due their investment decisions are based on expectations of profitability and the risk of their alternatives. These expectations are difficult to predict because they depend upon various factors that are highly uncertain, including...
In the last decade, the renewed interest in antiferromagnetic (AF) magnetoelectric (ME) materials has been driven by the challenging multifunctionality of spintronic devices. One of the most ambitious goals is to build exchange-biased ferromagnetic/AF junctions with electric field-controlled properties. In this context, the understanding of the modifications that size reduction induces in the magnetic...
We show topological waveguiding of single and correlated photons generated in a spatially modulated array of silicon nanowires. These are the first experiments with correlated quantum states in any topological photonic system.
We experimentally demonstrate topologically protected optical waveguiding in silicon at the interface between two topologically distinct dimer chains. Further, we propose and demonstrate beating between topological and trivial defect modes.
This paper proposes a new configuration of a 3 DOF parallel robot which uses revolute and spherical joints. It also presents the inverse kinematic model and proposes a PID-type controller with tracking to asymptotically track a desired reference trajectory. This 3 DOF parallel robot can be utilized as a motion simulator or ankle rehabilitator robot. Some simulations were performed with the virtual...
In this paper is presented an analysis of the phase lag index (PLI) in healthy controls and patients with disorders of consciousness aimed to find differences in connectivity of brain sources between these two states in different frequency bands. It was analyzed a total of 50 EEGs, 28 from healthy patients and 22 from patients with disorders of consciousness with two kind of montages, bipolar and...
Open-shop scheduling problems are highly complex (NP-Hard), where solution is represented by a permutation of machines order that each job must follow to be processed, and for each job, it can have a different machines order. The main goal in these problems is to reduce consumption resources, and at same time, improving several performance criteria. In this work we propose a computational strategy...
As part of the synchronization process between a tower and a cell phone in an LTE network, a timing advance (TA) that forces the cell phone to advance the transmission of its signal based upon the signal propagation time between the cell phone and the tower is calculated. The correlation between TA value and distance allows for a potential location scheme to be implemented. We present an improved...
The main challenge with microsensors is limited space, because tiny batteries store little energy. Harvesting energy helps, but only when ambient energy is available. And even then, power is low because miniaturized transducers harness little power. This is why managing how and when to schedule functional tasks is so important. This paper proposes a schedule that requires the battery to hold only...
This paper shows the results of a survey about teaching practices and teachers' awareness of Open Educational Resources (OER). The survey has been prepared taking as reference the teaching activities in accordance to the action research theory. In this way, teachers are asked about their current practices during the preparation of lesson plans before classroom sessions, the documentation with evidences...
We experimentally demonstrate topologically protected optical waveguiding in silicon at the interface between two topologically distinct dimer chains. Further, we propose and demonstrate beating between topological and trivial defect modes.
Solid-state drives (SSDs) have become pervasive in modern computing and are replacing hard disk drives in many applications. However, the mechanism by which SSDs store and modify data is intrinsically different from hard disk drives. For example, a memory location on a SSD must be erased prior to being written. The main contribution of this paper is a set of measurement and analysis techniques for...
A simulation for torque estimation during a sit-to-stand movement was developed on the aim of actuator selection on the development of an exoskeleton for the lower limb rehabilitation of hemiplegic patients. The results by simulation on a virtual environment are presented. A comparison between simulation results and experiments with real subjects performed by 4 authors are presented. Differences between...
Existing approaches for quantifying mental workload using electroencephalography often rely on probe stimuli to elicit stereotyped neural responses such as the P300 wave. Here we explore probe-independent algorithms for classifying three levels of task-complexity in a flight simulator experiment. Using input features derived from estimates of the average power in five frequency bands, we test a variety...
Positron Emission Tomography (PET) is a powerful functional imaging technique targeted for in vivo quantification and localization of physiological and pathophysiological functions. The possibility to develop a vast number of diseases in transgenic and knockout mice, and the chance to follow the onset of the diseases and the evolution of the treatment efficacy in an individual basis, made PET the...
Many wireless devices in common use today are worn either on or in close proximity to the body. Among them are a growing number of wrist-mounted devices designed for applications such as activity or vital-signs monitoring, typically using Bluetooth technology to communicate with external devices. Here, we use a tissue-mimicking phantom material in conjunction with anechoic chamber and network analyzer...
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