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Everyday, Smart Cities are closer to becoming ubiquitous around the world; current deployments include not only city wide parking systems but also energy-aware lightning and smart grid applications. This exponentially growing field is backed with several standards for communication and interaction, from the physical to the application level, such as RFC5548 on routing requirements for LLNs, and the...
The rapid growth of wind power generation brings new requirements for the integration of wind turbines generators to the grid. Among these requirements is the Low Voltage Ride Through (LVRT) requisite which demands wind turbines generators to remain connected to the grid during grid voltage sags at certain conditions, as well as the contribution of reactive current during the voltage sag so as to...
We discuss a contrast method for nuclear magnetic resonance imaging (MRI) based on the nutation frequency dispersion of the NMR signal amplitude in the rotating frame. As a practical matter, we test the concept using a specially designed phantom with independent compartments containing doped water (with copper sulfate) and a liposome suspension prepared with dimyristoylphosphatidylcholine. This last...
The Data Collection System (DCS) instrument on board the Argentine satellite SAC-D receives messages sent from environmental Data Collection Platforms (DCP). DCS system requirements not considered the positioning of the platform as a first step. As a result, the receiver does not have access to the GPS time information of the mission OBT (On Board Time). This paper deals with the problem of obtaining...
The present work proposes a serie of strategies for evaluation, oriented to highly technical contents courses, where traditional evaluation methods are getting less effective to measure the results in the learning process. At first we consider the actual problematic that exist on these courses, and then we propose how traditional evaluation methods are not so effectives nowadays. At the end, we present...
A Reflection Type Phase Shifter for 432 MHz is developed, based on the use of a 90° Hybrid Coupler and Varactor Diodes using software simulation tools to make the optimization.
The main goal of triage protocols in medical emergency room is to select and classify patients according to their disease severity, based on clinical data and vital signs. However, at least in Mexico, there is not a unification in this process, causing a subjective classification. In this paper, a basic stage of a prototype capable to assign an unbiased emergency level is presented. The protocol is...
Within the population with disabilities, there is a group that has intellectual, sensory, motor disabilities, or a combination of them. The International Classification of Functioning, Disability and Health (CIF) defines disability as an umbrella term for impairments, activity limitations and participation restrictions. It is estimated that over 15 % of the world's population is afflicted by disability...
A development of an Crossed Slot Antenna with ground plane is presented. This one was designed for work like Array Antenna Elementary Unit in an Incoherent Scatter Radar and was designed for 432 MHz. Here are described the requirements, the design process and optimization with software tools. Also there are description of measurements of a prototype, between 410 and 450 MHz, giving a VSWR < 2....
This paper describes the methodology implemented for the estimation of integrated water vapor (IPWV) over the land, by the use of brightness temperature measurements of the microwave radiometer (MWR) provided from the Argentinian Satellite SACD-Aquarius.
In the present work, a method of simplified design of a power transformer for a DC-DC full-bridge converter is proposed. The main variable of the method is the magnetic flux density of the transformer core. Copper and core losses are calculated as a function of the flux density. The information required for the calculation is obtained from the data sheets of the manufacturers. This method allows to...
All man-made system bases its decisions on sensory information. Sampling sensor signal is extremely important because it is the only process that connects the real world with the digital world. This paper presents sampling techniques for analog sensor signals that extract, from the sampling instant, information about the signal shape being of great interest for control and real time systems. Besides,...
In this work, the static performance of the Cordoba power system is analyzed, considering the 2015 Argentinean scenario. This year is characterized by the scheduled outage of Embalse Nuclear Power Plant; this plant is responsible for controlling the voltage of the central zone of the country (San Luis and Cordoba). In consequence, a remarkable deterioration of the power quality supply is produced;...
Delay-Tolerant Networks (DTNs) have been recently recognized as an alternative solution for building future space-based networks where communications are inherently intermittent due to orbital mechanics, resource constrains, or even spacecraft failures. Among the challenges to implement practical DTNs, the definition of a new communication protocol, which does not assume a persistent connectivity...
Volterra models have been shown to adequately capture nonlinear behavior. In this work, a Volterra-type model named Modified Generalized Memory Polynomial (MGMP) model is dealt with. An uncertainty characterization is developed to account for the uncertain system dynamics. For this purpose, a bounded interval is determined for every parameter in the model. Then, a robust identification procedure is...
Piezoelectric devices are critical components in many different fields. They are often used as ultrasonic transducers, micro/nano positioners, and actuators. Electrical characterization of these devices can be performed by means of very well known techniques focused mainly on impedance measurements at different frequencies. However, since the measurement of mechanical properties corresponds to the...
This project proposes the use of a well-known visual attention model for the construction of a traffic light detection algorithm that works on monocular images. The algorithm design is based on the physiological mechanisms that lead to attention. Its main function is to maximize the probability of the target in the regions of interest (ROIs) found. The algorithm presents a number of contributions...
In Argentine, like other countries of the world, information technologies and communications have had a significant boom in recent years. Consequently waste generation has increased, waste called e-scrap, e-waste or Waste of Electrical and Electronic Equipment (WEEE). This complex fraction of municipal solid waste must be treated in a particular way because of the quantities and variety of its constituents...
Zero-emission vehicles has been widely recognized as the most viable way to solve the problems associated with conventional thermal combustion, such as their operational inefficiency, the depletion of fossil fuels and increasing environmental pollution in urban settings. The purpose of this paper is the optimization of a hybrid electric vehicle powered by a fuel cell as primary source and lithium...
The progress of the power electronic devices and the reduction of their costs have made possible include Flexible Alternative Current Transmission Systems (FACTS) in the power systems. These devices have the ability to modify the parameters of an electrical network. These features make it an attractive strategy to reduce congestion in the power grid, increasing the transfer capability and providing...
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