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Currently, heterogeneous management affects the operation of networks in many organizations, causing economic losses and the degradation of the quality of their services. This situation gives way to the need for integrated management, hampered by the presence of multiple integration mechanisms that are incompatible with each other. A possible solution found for this was the use of APIs, in order to ensure that the management information offered by the different managers can be integrated into a single application. The great diversity of existing APIs in the market and the non-existence of a guide for their most appropriate use make the design and deployment of an integrated management system based on them a complicated task. In order to solve the aforementioned difficulties, this paper proposes a procedure to implement integrated management through the use of APIs, which starts from the search for the objectives of the organization, to achieve the deployment of a solution that responds faithfully to them. Said procedure allows to point out, from its first steps, important requirements from the analysis of the types of data that are handled in the solution in question. The usefulness of the proposed procedure was verified through its application in an entity. [ABSTRACT FROM AUTHOR]

In this paper, the results carried out about a study over the possibilities of the Predictive Functional Control (PFC) are presented. The French professor Jacques Richalet and his collaborators developed the PFC. The results presented were obtained, when PFC is applied to industrial processes with complex dynamics such as high order, integral effects in the direct step that make the process asymptotically unstable in open loop and the undesirable phenomena of delay and inverse response. The main objective of the study is to demonstrate the potential offered by the PFC algorithm, in its simplestform, for the control of such processes. To this end, a methodology for synthesizing the PFC controller is developed based on the postulates and principles proposed by the precursors of the method, applied to several real case studies. In all cases, completely satisfactory results were obtained by means of simulation in Simulink-MatLab and finally the results of applying the method to the temperature control of the TCLab minilaboratory developed at the University of Utah are compared. This verifies the real possibilities of the FPC as a prominent alternative to control of real process. [ABSTRACT FROM AUTHOR]

Due to the increasing use of LEDs in lighting systems, the LEDs reliability evaluation is a vitally important issue in the lighting industry, and consequently, the understanding of their failure mechanisms and failure modes are also. Although the construction process of LEDs is similar to other microelectronic devices, there are materials and functional requirements that make their failure modes and mechanisms different. This paper presents a review of research on the failure mechanisms and failure modes of LEDs used in lighting systems. This paper provides a basis for understanding the reliability issues of LEDs, as even the reliability information provided by LED manufacturers is not sufficient for users of this technology. [ABSTRACT FROM AUTHOR]

The study of the electrical phenomena that originate during the operation of the transformers is of vital importance to predict the consequences that these will bring and to improve the design of the system and of the transformer itself. To carry out these studies it is necessary to use existing simulation tools. The accuracy of the response of the simulation process depends on the degree of detail and the veracity of the data, as well as the type of mathematical model used, so it is necessary to obtain these data and their application in the most suitable model for the simulation of each phenomenon. This paper presents the results of a project that consisted in obtaining, through simulation, the impulse voltage distribution within the transformer windings from a detailed model with the final objective of verifying the effectiveness of the insulating systems used in the transformers prototypes used. [ABSTRACT FROM AUTHOR]

Three-phase asynchronous motors represent between 60% and 75% of world consumption. Their high incidence in the load curves of a country and, consequently, in the operation of electrical systems makes necessary the development of models that allow their analysis in an effective way and their use in software for the analysis of electrical networks. In any industry there are a large number of electrical machines located in Motor Control Centers all connected to the same busbar. It is possible to group all the motors that are connected to the same busbar forming a single equivalent motor. This paper presents a methodology for obtaining the parameters of an aggregate. From its application to three different case studies, the parameters of a universal aggregate model of a three-phase asynchronous motor for power system analysis are obtained. [ABSTRACT FROM AUTHOR]

In recent years, a large number of works have been presented that seek to solve the problem of road following by autonomous surface vehicles (ASV). In this sense, a non-linear guidance algorithm (NLGL), which has emerged in recent years for use in aerial vehicles, is presented as an interesting option for path tracking by marine vehicles as it does not use the yaw angle to achieve its objectives. control objectives. The biggest problem that these vehicles present when following paths is the influence of environmental disturbances on them, mainly sea currents and wind. To provide a solution to this problem, this paper presents a guidance and control scheme to achieve the following of straight paths by marine vehicles. It presents a cascade structure with an internal yaw velocity loop, which presents a PI controller as the main element, and the NLGL algorithm in the external loop. Thus, achieving that the vehicle follows a straight path with zero error without the need to measure the yaw angle and avoiding the implementation of an integral action in the external loop. An analysis is made of how the marine currents and the wind influence this system from the linearization of the presented scheme, in addition to a stability analysis of the scheme is presented. Finally, the results of simulation and real experiments of the implementation of this scheme in a small ASV are presented, where the vehicle converges to the desired trajectory with precision in the presence of environmental disturbances. [ABSTRACT FROM AUTHOR]

The water scarcity is a concern of the agricultural industry as it uses four fifths of the of the total fresh water consumed for irrigation and two thirds of the total used for human consumption. For this reason, the development of systems that optimize the use of water in irrigation is essential. In the greenhouses of the UEB "Valle del Yabú" of the Santa Clara municipality, irrigation is carried out using a drip-based system that requires the presence of an operator for decisionmaking who does not have information about some of the hydrometeorological variables that govern the crop. This paper focused on to design a support system for decision-making in irrigation based on machine learning. As an important parameter of the system, the evapotranspiration coefficient of the crop is calculated using the Turc formula. The collected environmental data is conditioned and linear regression, regressive random forests, and gradient-boosted trees regression models are trained with them to determine future evapotranspiration values using the Apache Spark framework. The model that obtained the best results was the regressive random forest with a coefficient of determination (r2) of 0,79 and with it the volume of water lost by the crop is calculated. Finally, the system was able to provide the estimates of both variables, which favour decision-making by specialists. [ABSTRACT FROM AUTHOR]

Due to the complexity of LEDs failure modes and mechanisms, its reliability is a key research issue. Existing methods for LEDs reliability prediction only consider one failure mode: lumen degradation or color change; however, working with only one failure mode could limit the scope of the analysis. This paper shows the procedure for obtaining reliability models of white LEDs through of bivariate copulas, from ''times to failure'' taken from the consulted literature. The results obtained show that the best fitting copula model, according to the Akaike Information Criterion (AIC) is the Clayton copula, whose Kendall correlation coefficient indicates that the characteristic parameters ''lumen maintenance" and ''variation of chromaticity coordinates'' are not completely independent. [ABSTRACT FROM AUTHOR]

Optimal distribution networks reconfiguration is very important in reducing losses and operating costs and in improving networks security, stability and reliability indicators. The work objective is reprogramming an algorithm that improves results obtained previously. Paper presents non-dominated classification genetic algorithm II parts adaptation and reprogramming, with a new coding that, unlike previous authors, avoids modified genetic operators and take better advantage of algorithm's potentialities. In addition, graph theory is used to transform non-feasible individuals and avoid new generations of them, dispensing with annoying mesh checking and reducing the search space and computational burden. Proposal's effectiveness was tested with 33 and 70 bars test distribution systems, showing promising results and better than previous proposals. [ABSTRACT FROM AUTHOR]

This paper addresses the current technological advances in the development of facilities for the testing and approval electrical vehicles batteries. Also, the main aspects for the design this kind of laboratory were analyzed with the objective in the near future in Cuba we will build it. Likewise, the most applied techniques and procedures in the world related with diagnosis and certification of electric vehicles batteries were studied. Based on these studies, the safety requirements and the equipment required for made the tests of those batteries were also considerate where the rough acquisition cost and the potential for the implementation in the country was estimated. The results of the investigation demonstrate the benefits of the implementation of this kind battery labs would be achieved, based on the profits it will generate by its use in the country. [ABSTRACT FROM AUTHOR]

This paper, it was analyzed how the angle of inclination and the azimuth influence the generation of a photovoltaic plant. The plants belonging to the 100 MW program, consisting of 30 photovoltaic plants distributed in Cuba, were analyzed. First, the plants with their current design were simulated and the results were compared with the measurements obtained in each plant. The comparison allowed validating the simulations, where the difference remained below 10%, in most cases. The next step was that different angles of inclination and an east-west orientation were analyzed. The results were compared with studies carried out in other parts of the world, where it is proposed that the angle of inclination and the east-west orientation as a new solution to increase the energy produced by a photovoltaic power plant, taking into account the geographical position, climatic conditions and the investment value or cost of the plant. [ABSTRACT FROM AUTHOR]

The Industry 4.0 paradigm aims to obtain high levels of productivity and efficiency, more competitive final products, and compliance with demanding regulations related to industrial safety and cyber-security. To achieve these goals, industrial systems must be equipped with condition monitoring systems for the early detection and localization of faults and cyberattacks. This paper proposes a robust condition-monitoring strategy through the use of Deep Learning algorithms. The proposed scheme was validated using a Tennessee Eastman (TE) process with excellent results. The proposed strategy was compared with other condition monitoring schemes. The higher performance obtained by the proposed scheme indicates its feasibility. [ABSTRACT FROM AUTHOR]

The tracking of radiofrequency signals emission source that use directive antennas constitutes a trend in the modern telecommunication systems. The present investigation is based in the application of digital signal processing techniques in FPGA to estimate the angular position of the signal emission source using monopulse. The paper shows design and implementation of processing blocks to determinate source direction from sum and difference resulting channels of the antenna. The system is done by multidomain simulation platform Simulink and exported to hardware description language for implementation in FPGA (Field Programmable Gate Array). In the obtaining of error curve are used polynomial approximation models. The developed system is verified through eight elements antennas array with digital beamforming. [ABSTRACT FROM AUTHOR]

The existing combined regulation methods do not lead to efficient management of water in isolated hydraulic turbines; these do not prioritize the minimization of the value of the resistive dump load. In this paper, a frequency regulation scheme was proposed that combines a minimum dump resistive load and the flow of the Pelton turbines that operate autonomously. At the begining on this paper was identified the state of the art of autonomous isolated hydro. Also was charactererized in cuban contect and the posibilities of dump load and flow cntrolls methods. Finally was evauated the combination of this two methods due to a generalized cuban study case. The simulation results of the method in Matlab®/Simulink was processed through a case study, from models obtained in previous investigations, contrasted with benchmark reported in the literature. With this scheme it was possible to increase the energy efficiency of autonomous mini-hydroelectric plants. Through simulation the proposed scheme was validated in a way that complies with Cuban standard NC62-04, with a reduction of the resistive dump load at 6% of the generator nominal power value. [ABSTRACT FROM AUTHOR]

Tennessee Eastman plant (TEP) involves very complex process with presence of non linearity, for that it is necessary the control of important variables. In this paper a TEP model is developed. Gray box models are selected to model the process. Gray box models have advantages with respect to classic model techniques, these techniques are knowledge models and empirical models. First, models are obtained employing mass and energy balances, defining parameters and making supposed. Then, from process data and employing MatLab® software, empirical models are obtained. The combination of all models constitutes the gray box final model and the general objective of this paper. [ABSTRACT FROM AUTHOR]

This paper presents a study of the self-interference on SFN for DTMB based on the results of laboratory tests with professional and commercial receivers. The spectral inefficiency of the actual MFN represents a constraint for the evolution of the telecommunication technologies on Cuba, but It's is necessary to know the real capabilities of SFN on DTMB before a possible transition. The principal restriction for the design of SFN is the incapability of the receivers to estimate and equalize correctly the signals with delays bigger than frame header length. However, signals within this interval could represent either constructive or destructive interference. For that reason, in this paper, two ways to determinate the influence of the auto-interference on the DTMB signal quality are presented. First, the SFN gain values are analyzed using the MER as the measuring parameter. The signal strength and the delay and attenuation between signals are varied to emulate real conditions of a two-transmitter SFN. Second, a group of commercial receivers is evaluated using the TOV condition to determine the necessary attenuation between two SFN signals for keeping the correct visualization. [ABSTRACT FROM AUTHOR]

The circular economy (CE) model promotes the production of goods and services in a sustainable way, optimizing the consumption of natural resources and mitigating the wastes. In the last years, this model has received a lot of attention and support at the governments' level, internationally; also, in Latin America. Cuba pleads for a sustainable development, with political and incentives for the recycling, the use of the renewable sources and the energy efficiency, as impeller motor of its economic model. Hence, Cuban universities have been requested to include this topic in their study plans, for all the careers. The objective of this paper is to describe how the topic of Circular Economy has been incorporated in the Study Plan of the Electrical Engineering Career at the Technological University of Havana "José A. Echeverría "CUJAE and the results, during the implementation in the 2021 academic year. [ABSTRACT FROM AUTHOR]

Electric Power Systems (EPS) are not conceived without contingency plans for partial and total collapses. National Electric System is constantly threatened by meteorological phenomena, so it is not exempt from the preparation of mentioned plans and it has a procedure in case of collapses of such magnitude. This paper describes the procedure's updating process for total collapses, introducing new strategies to follow for its realization. The restoration's stages after the collapse are briefly detailed. Then, it is proposed to use the strategies of "all open" and restoration in parallel. For their selection, the advantages and disadvantages of these strategies will be taken into account according to the consulted bibliography. In addition, it is proposed how the islands should be formed for the restoration. [ABSTRACT FROM AUTHOR]

This paper focuses on the implementation of a hardware coprocessor intended to speed up multiplications over the Fp² finite field extension in the context of bilinear pairings. Being aware of the high degree of parallelism present at different levels of pairings computation, especially in the case of Fp² multiplications, we propose a hardware architecture based on internal and external pipeline structures allowing both, accelerate a single multiplication and perform several multiplications in parallel. This enables the development of a hybrid hardware/software solution on a SoC-FPGA for computing bilinear pairings that improves the performance of equivalent state-of-the-art implementations up to a 22.5%. [ABSTRACT FROM AUTHOR]

Automating the measurement of arterial blood pressure (ABP) remains an ongoing challenge. In a recent paper, a proposal is presented to automate the measurement of PSA based on the pulse transit time or (PTT), measured between the electrocardiographic (ECG) R-peaks and the peaks maximum slope of the oscillometric signal. In this research the method was evaluated; noticing loss of information regarding the pulse amplitude, increased distortion of the envelope and rising measurement system. However, it provides a reference to the ECG signal so that it is proposed to integrate with other methods of measuring PSA greater degree of robustness to motion artifacts such as CITLO method as fiducial mark. [ABSTRACT FROM AUTHOR]

Massive neonatal screening is a test performed on all newborns to detect and prevent congenital, hereditary and metabolic diseases that affect the child's normal growth and development. This test consists of making a small puncture in the heel of the baby to take a few drops of blood and place them on a filter paper to be analyzed in the laboratory. One of the stages of this analysis is the quality evaluation of the samples based on elements such as the coloring of the samples, the drying, the presence of impurities and the presence of clots. Because this stage requires high experience, agility and visual memory of the specialists, sometimes samples are taken to the laboratory and they do not provide the best results due to the low quality they present. This paper presents a study to develop an automatic classifier based on deep artificial neural networks that evaluates the quality of the blood samples analyzed. This classifier is based on pattern recognition associated to the color moments and the HSV components, extracted from the images of blood samples. For this, a deep neural network formed by two deep autoencoders and a softmax classifier is trained with examples of images of blood samples, obtaining satisfactory results in the validation of the method with the correct classification of the samples submitted for analysis. [ABSTRACT FROM AUTHOR]

In recent years, a large number of works have been presented that seek to solve the problem of road following by autonomous surface vehicles (ASV). In this sense, a non-linear guidance algorithm (NLGL), which has emerged in recent years for use in aerial vehicles, is presented as an interesting option for path tracking by marine vehicles as it does not use the yaw angle to achieve its objectives. control objectives. The biggest problem that these vehicles present when following paths is the influence of environmental disturbances on them, mainly sea currents and wind. To provide a solution to this problem, this paper presents a guidance and control scheme to achieve the following of straight paths by marine vehicles. It presents a cascade structure with an internal yaw velocity loop, which presents a PI controller as the main element, and the NLGL algorithm in the external loop. Thus achieving that the vehicle follows a straight path with zero error without the need to measure the yaw angle and avoiding the implementation of an integral action in the external loop. An analysis is made of how the marine currents and the wind influence this system from the linearization of the presented scheme, in addition to a stability analysis of the scheme is presented. Finally, the results of simulation and real experiments of the implementation of this scheme in a small ASV are presented, where it can be seen that the vehicle converges to the desired trajectory with precision in the presence of environmental disturbances. [ABSTRACT FROM AUTHOR]

The aim of this paper is to design 1-Dimensional Non-Uniform Constellation for DTMB standard and evaluate their performance improvements with regard to channel capacity. The use of such constellations offers a biggest spectral efficiency, reception at lower Signal to Noise Ratio and a Shannon limit gap reduction. Such constellations are designed based on the BICM optimization criterion. The DTMB system with the proposed constellations is validated by mean the analysis of BER, Capacity and Spectral Efficiency vs. Signal to Noise ratio. The results are always compared with the original standard. The simulations take into account the different available code rates of the standard, 6 MHz of bandwidth and AWGN channel model. The paper present the theoricals fundamentals of channel capacity, Uniform and Non-Uniform constellations and the description of the design algorithm. Moreover, the characteristics of the resulting constellations are shown. [ABSTRACT FROM AUTHOR]

This paper approaches the issue of the partial introduction of electric vehicles in the public transport sector, analyzing the possible reduction of environmental pollution and fossil fuel consumption by replacing part of the real fleet as the main aim. Starting from the previous analyzes and the characterization of the vehicles fleet belonging to the company, a substitution is proposed based on the changes that would be made in the associated electrical system, as well as the electric vehicle technology itself through the technical, economic and environmental evaluation, taking into account two prototypes that are currently working. The results of the research show the benefits of replacing internal combustion cars with electric ones, based on the savings obtained in operation and maintenance, as well as the reduction of greenhouse emissions. [ABSTRACT FROM AUTHOR]

In this paper a typical electric vehicle (EV) control system driven by an interior permanent magnet synchronous motor is described. First of all, the mechanical requirements that an EV imposes to its drive are described and explained. The construction, operational characteristics and advantages of an interior permanent magnet synchronous motor that justifies its widespread utilization as an EV drive are explained and justified. Afterward, the control strategy of an EV is exposed and justified. Finally, the Maximum Torque per Ampere (MTPA) control method of an interior permanent magnet synchronous motor is highlighted. Finally, a simulation of a car's electric vehicle driven with a permanent magnet synchronous motor is presented. Four typical scenarios of the operation of the car was selected and through the simulation of motor control system as a whole it was possible to predict the transient performance of the vehicle with the scenarios selected. [ABSTRACT FROM AUTHOR]

This paper presents the methodological development to coordinate the insulation of medium-voltage electrical networks; the study was carried out applying calculation procedures, in which the different factors involved in defining and dimensioning the appropriate insulation level for the equipment making up a primary electrical network are evaluated. In order to carry out insulation coordination, it is necessary to know and determine the operating parameters of the system under analysis and to determine its components, in order to then define the electrical characteristics that the lightning conductor (lightning conductor) must have and, based on the provisions of IEC 60071-1 and IEC 60071-2 standards, to determine the types and levels of overvoltages that could occur in the network, considering the different coordination factors, safety and height correction, in order to cover the defects that may occur in the insulation due to the real operating conditions and thus select an adequate insulation level. [ABSTRACT FROM AUTHOR]

This paper presents a super resolution Direction of Arrival (DOA) estimation system based on a combined hardware-software implementation for radio frequency signals. After computational simulation of the chosen method, the system is designed and implemented using two multichannel wideband microwave transceivers controlled by a FPGA board connected to a host computer with a PCI Express adapter. A graphic interface is developed to visualize the spatial spectrum and validate the right system performance. The followed procedure shows up the main issues and requirements when this kind of method is implemented. Moreover, a generic modular and flexible hardware solution is proposed where no custom printed circuit board design and fabrication is needed. [ABSTRACT FROM AUTHOR]

This paper shows the obtaining process of a digital beamformer of multiple simultaneous directional patterns for signals reception using the ARRadio evaluation board. The board is based on the integrated transceiver AD9361 and guarantees the reception, digitization and seending to an FPGA (Field Programmable Gate Array) of the received radio waves by each radiofrequency channel. The FPGA is located on the TR4 Development Board. Communication between FPGA and ARRadio is realized through a high speed connector. On the programmable device are performed AD9361's configuration and control, multichannel calibration process based on Fourier Transform (as method of measuring the delay between channels) and beamforming of multiple simultaneous directional patterns digitally. Simulink is used as design tool for digital system develop. Finally is realized the implementation and experimental verification of multiple digital beamforming system. [ABSTRACT FROM AUTHOR]

This paper intends to formalize a proposal of multiservice schemes based on the Digital Terrestrial Multimedia Broadcast (DTMB) standard, using the TDM (Time Division Multiplexing) and LDM (Layered Division Multiplexing) techniques. It is a well-known fact, that TDM is a widely used technique, which has been implemented in multiple applications; on the other hand, LDM which grew out from the Cloud Transmission concept, is a new promising multiplexing technique for offering simultaneously stationary and mobile/indoor services with different robustness and bitrates using the same radiofrequency channel. Recently, LDM has been accepted as a baseline technology for the new generation digital terrestrial television standards (ATSC 3.0). The proposed LDM implementation that is addressed in this paper is based on a structure of two layers for the services: mobile and fixed. In the same way, three different scenarios of TDM schemes have been defined, with the aim of performing a comparative analysis of the performance of both schemes. Finally, based on the obtained results of the simulations carried out, for each of the multiplexing techniques were identified the optimal operating points. [ABSTRACT FROM AUTHOR]

Today, the development of human life depends on the supply of energy obtained mainly from fossil fuels. This resource is limited and its availability finite. Solar energy can meet the needs of the global population. Concentrated solar energy uses a mirrored surfaces that reflects and concentrates the rays in a receiver that absorbs the solar energy transferring it as heat to the fluid that circulates inside it and that can be used in processes that need thermal energy. The efficiency of the system depends on the optical quality of the concentrating mirror. In this paper, the optical efficiency(ηop) of a prototype parabolic disk is determined using a calorimeter, which acts as a receiver, being the value ηop=0,71±0,02. The method is validated by applying a modified Hartmann's optical scanning test, the values wereηop=0,70±0,02 for the of intercept factor method and ηop=0,69±0,02 for the optical simulation. [ABSTRACT FROM AUTHOR]

This paper presents the development of a fuzzy inference module (FIM) implemented on reconfigurable hardware with the ability to dynamically modify its knowledge base. The original FIM is designed using the fuzzy systems development environment Xfuzzy, which allows the generation of VHDL hardware description language code for the FIM architecture. Subsequently, the VHDL code is modified to add ports with the address, data and read / write control signals to the antecedents and rule memories that contain the knowledge base. The modified FIM is encapsulated in an intellectual property module following two possible options, making the corresponding interconnections in each case, so that these memories can be accessed through the added port from a processing system embedded in the same device, enabling the modification of its contents in operation time. The implementations were carried out on two types of reconfigurable devices: a Spartan-3E1600 FPGA, using a processing system based on the Microblaze softcore and the ISE/EDK development environment; as well as on a SoC-FPGA Zynq-7Z010, using its hardcore processing system based on ARM and the Vivado development environment, checking the dynamic modification of the FIM knowledge base. The carried out modifications make it easy to fine-tune the knowledge base during the development stage of a hybrid hardware/software fuzzy controller as well as the implementation of an adaptive fuzzy controller. [ABSTRACT FROM AUTHOR]

This paper describes the new functionalities introduced to the source code of the decoder box model SDP160 of the SOYEA brand to obtain, adjust and correct the Signal Level values and the Signal to Noise Ratio of the DTMB digital television signal received. (Digital Terrestrial Multimedia Broadcast) with 6 MHz channeling. These modifications to the source code of the decoder box give rise to the Tool to monitor the digital television signal. It explains the process of calibration and adjustment of these parameters. The functionalities implemented for storage are shown with flow diagrams. Moreover, it is exposed the incorporated functionalities for the analysis and display on the screen of the received signal data. [ABSTRACT FROM AUTHOR]

This paper proposes the design of an IMC-PID controller with a fractional order filter (IMC-FPID) for the effective control of water distribution in a main irrigation canal pool. From real-time data and applying the system identification procedure a dynamic mathematical model of this process is obtained, which is represented by a first-order transfer function with a time delay. Based on the model obtained an IMC-PID controller with a fractional order filter was designed that behaves effectively. The simulation results compare the performance of the proposed controller with a conventional IMC-PID controller. In this comparison, the performance index of the integral of absolute error (IAE) was used. The results obtained show that the proposed controller provides lower values of this index and consequently outperforms the conventional IMCPID controller in terms of performance and accuracy. [ABSTRACT FROM AUTHOR]

With the development of the Internet of Things, the number of devices connected to the Internet grows exponentially, and this brings with it a huge increase in the amount of data to be processed in the cloud, increasing traffic, to the detriment of the quality of service. This, together with the low latency and mobility requirements of more than a few applications associated with the Web, has led to a rethinking of the cloud computing paradigm, with decentralized variants appearing that are made closer to the network devices. Fog computing emerges as a new paradigm to solve the problems raised, extending the traditional architecture of cloud computing to the edge of the network. Despite the boom that fog computing has been gaining, there are challenges concerning its implementation in real scenarios, such as smart cities, where the heterogeneity and mobility of devices, as well as the scalability and interoperability required, are aspects that must be considered. The main objective of this paper is the presentation of a guide that guides how to implement this technology in smart cities. The proposed procedure is partially validated for a garbage collection use case in Old Havana, within the framework of a project of the National Program of Science, Technology and Innovation of Informatization. [ABSTRACT FROM AUTHOR]

This paper deals with the implementation of an Artificial Neural Network on reconfigurable hardware. The authors developed an application for character recognition using a feedforward backpropagation neural network, developed on an FPGA. In order to carry out such implementation the computational model of the neural network is translated into a FPGA synthesizable model using the Matlab/Simulink environment as well as the System Generator Xilinx tool. The results are illustrated in a prototype developed on an Atlys board. The authors focus the analysis and discussion on the main aspects considered to synthetize an ANN on an FPGA as well as the methodology to follow during such implementation, which are the main contributions of this paper. [ABSTRACT FROM AUTHOR]

The simultaneous tripping of the two end power circuit breaker in the transmission line is one of the complex and costly problem to be solved for the distance protection. The solutions to accelerate the distance protection tripping that not use the communication channels do not reach the necessary requirements. This document presents a bibliographic review of the acceleration methods of distance protections in transmission lines. In this paper is presented first the acceleration methods without communication are presented, investigated and implemented by several scientists and companies that market protection systems for transmission systems and then the conventional methods are referenced, implemented on communication systems to accelerate the operation of protections against failures, and. Also in this document, fault detection and acceleration systems are analyzed, using the traveling wave analysis methodology. [ABSTRACT FROM AUTHOR]

All the photovoltaic farms in operation in Cuba use monofacial photovoltaic panels. With the technological maturity of the bifacial panel production, since 2018, these have been gaining a growing presence, and it is presumed that in 2021 they will constitute 30% of the world market for solar panels. Bifacial panels, also generating on the reverse side, can increase efficiency between 5 and 30% of the same area. The national and international literature on the subject was reviewed and simulations of a real project in the province of Las Tunas were carried out, assuming an albedo of 0,202 and bifacial modules. This paper was concluded that it is feasible to evaluate the introduction of bifacial panels for future fixed tilt and horizontal single axis tracking projects in Cuba. [ABSTRACT FROM AUTHOR]

In this paper an implementation of Robotic Operating System (ROS) on a mobile robot designed for human interaction and service is presented. The platform is designed using a digital system based on an Arduino Mega board and a Single Board Computer (SBC) Raspberry Pi in communication with a remote computer. The microcontroller board is used to perform all low-level operations over the hardware. It's established a serial communication between microcontroller and Raspberry Pi which is running various ROS packages to manipulate information. A Raspberry Pi camera it's connected to the SBC and the frames captured by the camera are sent to the remote computer for image processing using ROS and OpenCv; the response is generated on the remote computer in dependence of the image taken. The project gives the description of a layered distributed implementation of ROS in a mobile platform developed in Cuba in lower cost that many present on the market. [ABSTRACT FROM AUTHOR]

Satellite broadcasting systems are an economical alternative for the deployment of television and other services in sparsely populated and difficult to access areas. This paper presents the modeling and hardware implementation of a DVB-S receiver according to the specifications contained in the EN 300 421 standard. The receiver is modeled and validated within the Simulink environment. From the validated model, an equivalent VHDL code is generated using the HDL Coder and HDL Verifier tools. Both Simulink synthesizable HDL modules and Xilinx Core Generator IP modules are used in the design for implementation and validation in a hardware environment, using the FPGA in the Loop tool. A comparison is made between implementation with native HDL blocks from the Simulink environment and the use of modules from the Xilinx platform. [ABSTRACT FROM AUTHOR]

This paper describes the implementation of a motion detector system for traffic control's smart cameras on embedded devices that can be used in multiple application fields. The proposed system detects moving areas in video sequences, thus reducing the processing time of video analysis algorithms by selecting regions of interest. As part of this work, three motion detection modules, and auxiliary blocks, were developed based on the bio-inspired elementary motion detector presented by Reichardt & Hassenstein. These motion detection modules have been incorporated in the portfolio of modules in the XIL XSGImgLib video and image processing library, which aims to speed-up and ease visual image processing applications over Xilinx FPGAs and SoC FPGAs. To test the detectors, a spatio-temporal motion detection application has been implemented on a Spartan-6 LX45 FPGA using video sequences from a vehicular traffic control point, showing execution time improvements on the elementary motion detector block compared with similar developments reported in the consulted literature. [ABSTRACT FROM AUTHOR]

This paper describes the design and implementation of a wireless electrocardiographic monitoring system for Android devices. The system consists of a device that will act as a server located in the patient and another device that will act as a client. The server incorporates the stages of protection against external defibrillators, acquisition and transmission of the signal through a Wi-Fi module (ESP8266 NodeMCU), and the client receives, processes and displays in real time the electrocardiogram (ECG) signal in a smartphone or an electronic tablet, with Android operating system. In addition, it calculates and displays the RR series from ECG and two diagnostic indicators with a delay of less than two seconds. The experimental tests of the prototype with seven volunteers showed the excellent performance of the proposed protocol for the application layer of the system and the fulfillment of the established design requirements and criteria. The system allows registering the ambulatory ECG within a range of up to 15 m and is an excellent alternative to increase the quality of life of the elderly or other people who present problems for locomotion (temporary or permanent). [ABSTRACT FROM AUTHOR]

In this paper, a review of the state of the art of the control strategies used for the water distribution control in irrigation systems is developed, aimed at increasing the operability of these systems, as well as reducing water losses due to operation. The historical advances of this kind of control systems are shown. Finally, some of the challenges of the international scientific community are offered to continue improving the capability and performance of the controllers used in irrigation systems. [ABSTRACT FROM AUTHOR]

Software defined Wireless Sensor Networks (SDWSN) decouples the control plane from the data plane, thus moving the control logic from the sensor node to a central controller. SDWSN is a new paradigm that promise to simplify the network management of traditional Wireless Sensor Networks (WSN). This paper presents a reviews of SDWSN architectures, with special emphasis on the development of the data and control plans and the functionalities provided by these architectures. The development of this technology is still in the initial phase and although it brings benefits to solve the problems of the WSN, the inherent challenges of the WSN characteristics must be overcome. [ABSTRACT FROM AUTHOR]

This paper presents a method for designing a power amplifier for high efficiency Class-E broadband topology using a low- pass filter of a high order is presented. A study of the state of the art regarding the design of a power amplifier Class-E performed operating within the frequency band of 0.8 GHz to 1.5 GHz. In the design accordingly ensures the attenuation of the power of the second and third harmonic, critical to achieving high efficiency amplification criterion. The design equations and simulation were made in AWR Design Environment V13. The efficiency levels achieved were 74%, the efficiency of added power (PAE) 72% power gain was more than 8 dB across the band, a bandwidth of665 MHz, and the band of 60.8% was achieved, with an efficiency drain and PAE above 50%. [ABSTRACT FROM AUTHOR]

The congenital hearing loss causes important changes in the cerebral organization, as well as a delay in the neurodevelopment of the child. The adequate implementation of neonatal auditory screening programs guarantees early diagnosis and intervention. The equipment used in these programs must be easy to operate, portable and present automatic methods for the detection of hearing loss. In this paper we present the Control Module, based on the STM32F429xx microcontroller, of the neonatal screening system known as Infantix, developed by the Neurosciences Center of Cuba. This module has among its functions, feed and control the rest of the system, process the bioelectrical signals from the recording module, store the patient data and their tests, and establish the interface with the user. As a result, a Control Module was obtained, which provides portability to the system, powered by battery and low consumption. The implemented module presents a friendly user interface and the ability to run tests automatically, without the need for highly qualified personnel. With the development of this module, a new alternative for the early detection of hearing loss emerges. [ABSTRACT FROM AUTHOR]

Due to the increased use of LED technology and the complexity of its modes and failure mechanisms, its reliability is a key research issue. To carry out reliability studies based on accelerated test data, the Weibull distribution is generally the most widely used; but in the LEDs, as these are degraded continuously, this distribution may not work with the same efficacy. This paper shows the procedure for obtaining reliability models of white LEDs used in lighting, from non-traditional probability distributions of "times to failure" obtained, according to the criterion L70 of ASSIST, from accelerated testing of the consulted literature. The analyzes carried out with the "times to failure" showed that there is insufficient evidence to reject that the data follow the distributions of Weibull-Exponential Generalized(WGED) and Modified Weibull(MWD), according to the Kolmogorov-Smirnov Test. [ABSTRACT FROM AUTHOR]

The objective of this paper is to design and implement an automated robotic installation to perform measurements of magnetic induction and data processing. To achieve this goal, an automated prototype carrying the Hall effect probe is designed and constructed. A software is developed for the control and processing of the data obtained in the measurements made that allows statistical calculations and data mapping. The magnetic induction on the surface of the conditioner that provides the possibility of evaluating the characteristics of the same. With this work you can achieve quality in terms of efficiency and precision when taking measurements to perform the magnetic characterizations in the Magnetic Characterization Laboratory of the CNEA, the only laboratory of this type in the country that is close to being accredited. To achieve greater precision in the acquisition of measurements by providing a reliability laboratory at the level of other laboratories in the world, since it will now have calibrated equipment, automatic measurements and experts in these subjects. [ABSTRACT FROM AUTHOR]

Wind generated waves are a very random phenomenon and it is one of the main environmental disturbances that affect the operation of Autonomous Underwater Vehicles (AUV) navigating in shallow waters and coastal zones. In order to attenuate the undesirable effect of the ocean waves on the control system of AUVs, the measurements from the sensors need to be filtered out, using the estimated wave encounter frequency. Developing an estimator capable of providing the encounter frequency in real time using the Algebraic Identification method, is fully reported in this paper. In the design of the proposed algebraic estimator, a linear differential equation to represent the waves spectrum is used, which simplifies the mathematical procedure. The simulations carried out with simulated data and with real data from an experiment at sea, show the excellent results of the estimator in terms of precision in the final value and estimation time. In addition, its show the use of the wave encounter frequency estimation to adjust the filtering techniques previously implemented for the vehicle in a proper way, which results in a reduction of vibrations and energy consumption of the vehicle's rudder system. [ABSTRACT FROM AUTHOR]

The paper starts by casting new light to the existing Phase Lock Loop (PLL) schemes used to synchronize the static converters with the grid under utility disturbances. Two approaches are pursued to detect the fundamental harmonic of the positive-sequence component of the grid voltages in presence of the disturbances. Arithmetical approaches improve the operation of the basic PLL circuit by making robust the PLL algorithm. Structural approaches improve the operation of the basic PLL circuit by adding a block intended to cope with the disturbances. This paper considers the structural approach and shows that it works by either post processing the detected grid quantities or preprocessing the grid voltages. Afterwards, the paper proposes an improved PLL scheme termed as double processing (DP) PLL scheme since it includes preprocessing and post processing functionalities. By properly designing the scheme parameters, it is proved that the proposed scheme exhibits superior robustness against the utility disturbances. [ABSTRACT FROM AUTHOR]

One of the variable speed wind turbines most commonly used today is the doubly feed induction generator(DFIG).A control scheme of DFIG is discussed in this paper. The power converter connected to the grid side (bus) is modeled and controlled using voltage vectororiented dq reference frame, whichguarantees that the active power can be controlled by the daxiscurrent component and consequently the DC bus voltage. The qaxis component is forced to be zero in order to ensurethe unitary power factor. Astator flux oriented control in the rotor circuit converter is used.A novel GDSC - PLL method is used in order to achieve an efficient synchronization with the grid.Onthe order hand, this paper presents an analysis about the DFIG (Double Feed Induction Generator) behavior during voltages sags. [ABSTRACT FROM AUTHOR]