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In this paper, we present a detailed analysis of a draining tank filled with a certain fluid by means of numerical simulations. All calculations were performed using interactive software developed by the authors in Python programming language. This computer code was made in the context of the final project of Physics I course for Computer Engineering career of the National University Arturo Jauretche...
This paper presents the main features of the PVSET software (Photovoltaic Simulation and Evaluation Tool) developed by the Institute of Electrical Energy of the National University of San Juan-Argentina. This tool enables researchers and designers to interact friendly and easily understandable with proposed detailed models and control algorithms for solar photovoltaic (PV) generation systems. Thus,...
This paper presents a method to control the delays generated by a cascade of optical ring resonators (ORRs). Delays generated were implemented numerically using 5 ORRs of 12 mm diameter, embedded in silicon dioxide (SiO2) and silicon nitride (Si3N4), and their values were approximately constant in a bandwidth near to 3 GHz. The control parameters of the system are given by the coupling factor and...
A prototype of stacked patch antennas with circular polarization for ISM 2.4 GHz band has been designed, simulated, constructed and characterized, based on the difference of dielectric constant of two RF substrates. The simulation results with FEKO software, available for academic applications in the Escuela Superior Técnica (EST), have been compared with preliminary measurements at INTI.
Arithmetic operations on matrices are frequently used in scientific computing areas. They usually become a performance bottleneck due to their high complexity. In this context, the parallel processing of matrix operations in distributed environments arises as an important field of study. This work presents several strategies for distributing sparse matrix arithmetic operations on computer clusters,...
This work describes the main aspects about the system design that performs the current control of high power LED for street lighting. This system is powered by a gel battery which is charged using a solar panel. In this control scheme, is achieved: (i) the operation of the solar panel on its maximum power point by a simple MPPT algorithm, and (ii) the acceptable battery voltage and current control...
Radio Tomographic Imaging (RTI) is a new method for tracking and localizing moving objects within an area surrounded by wireless nodes. Signal blockage caused by one or multiple objects (i.e. a person) will attenuate the Received Signal Strength (RSS). In this paper, we experimentally present the limits where RTI may not operate properly, taking into account some of the main parameters such as number...
This work presents a mobile robot capable of producing a rough map of an interior of a building. The goal is to build a mobile robot, with the ability of self-localization, navigation, and mapping. To accomplish this, several technologies were used: Arduino development board, the Robot Operating System (ROS), and a Kinect sensor. The constructed robot offers a wide field of applications; besides mapping,...
Ladder converter architectures offer substantial improvements compared to traditional solutions since each converter only needs to process the power difference between series connected photovoltaic (PV) devices (module, substring, cells). A strategy for balancing the current produced by each cell is studied in this work, using a group of dc-dc buck-boost converters. A controller capable of profiting...
A proposal for the implementation of an autonomous defects detection in wooden boards and their implementation with multi-core parallel processing is described in this paper. Also an adaptive histogram enhancement method as a pre-processing stage for automatic histogram threshold segmentation of defects is presented. Specifically, experiences were made with pine samples extracted manually by an expert...
This work presents a novel linear algebra methodology able to adequately design the controller algorithm for an efficient trajectory tracking of a continuous stirred tank reactor (CSTR). The mathematical model of the CSTR is represented by a system of coupled nonlinear differential equations, which is then approximated through a discrete statement of the problem. The discrete model is reorganized...
Heterogeneous computers performance measurement is not a trivial task. Because of the implicit diversity of the architectures, it is hard to define a clear performance metric. We used SURF as a benchmark for heterogeneous computers. We measure results on multiple computers using OpenCL and CUDA implementations. Results show consistent measurements among platforms, implementations, and dataset size...
A common complaint among engineering grade students is the lack of experimental and laboratory practices that help materializing the theoretical knowledge acquired during regular courses. This paper shares the experience attained over several years by integrating computer and physical simulation models and low-cost microcontrollers for control system grade-level courses among different careers, each...
In this work characterize random signals which can be linearly determined by its discrete time samples, this problem is related to the question of the representation of random variables by means of a frame sequence. We study different representations for processes which are linearly determined by a frame sequence. This concerns the stable representation of continuous time processes by means of discrete...
The environmental Data Collection System began in June 2011 when the satellite SAC-D went into orbit. One of its instruments, the DCS receiver (Data Collection System), receives data transmitted by autonomous platforms located on earth. The information is received by the Earth Station Cordoba in order to be distributed to the users. For the installation of the DCP (Data Collection Platform) it is...
This paper is dedicated to the design, simulation and construction of a probe to measure NIR power density affecting human tissues, and thus, how to extract data needed to compare them with values set by WHO (World Health Organization) and other international organizations. Thus, specifying whether transmission systems are within the ranges of damaging power. This research was conducted as part of...
Worldwide, the technological change of Analog Television into Terrestrial Digital Television started since 1998. It's an inevitable change that each country has to face and which is part of the digitizing process that already has taken place in many other technologies. In order to determine the most convenient standard for Cuba, and technological infrastructure planning, it was necessary to take into...
Design and implementation of a Luenberger nonlinear observer to estimate the road condition in a 4-wheel electric vehicle is presented in this paper. Knowledge of the road condition allows controlling the force transmitted to the road by traction wheels, thus preventing slippage even in low-traction surfaces. This is done to improve vehicle control and prevent loss of stability that may be risky....
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