Adriano Rogério Bruno Tech

Quantifying electrode position effects in EEG data with Lempel-Ziv complexity

Complexity measurement using Lempel and Ziv algorithm (LZ) has been used to analyze physiological data. This work shows that the Lempel and Ziv complexity measurement of EEG signals using wavelets transforms is independent of electrode position and dependent on cognitive tasks and brain activity. EEG database with 122 subjects from the public EEG dataset was used in this study. This database have spontaneous EEG and evoked potential (EP) data from a 64-multielectrode array under a variety of conditions collected at several centers in the United States, sponsored by the National Institute on Alcohol Abuse and Alcoholism (NIAAA) project. Two experiments were performed with this database. The first experiment was to test the dependency of electrode positions into LZ complexity measures and the second experiment was to analyze if the LZ complexity was sensitive to the EEG acquired from control and alcoholic subjects. The results show that the complexity measurement is dependent on the changes of the pattern of brain dynamics and not dependent on electrode position.

MONITORIZACIÓN DE REBAÑOS DE BOVINOS A TRAVÉS DE REDES DE SENSORES INALÁMBRICOS

Se presenta el prototipo de un sistema proyectado utilizando tecnicas de instrumentacion electronica y tecnologia de comunicacion inalambrica pudiendo ser utilizado para recolectar datos fisiologicos y monitorizar rebanos de bovinos. La necesidad de desarrollar tecnicas de adquisicion de datos, que causen menos perturbaciones al comportamiento natural de los animales, de interes en la zootecnia de precision, fue la principal motivacion de este trabajo. Para probar la aplicabilidad de la tecnologia de las redes de sensores inalambricos en este campo, se construyo una infraestructura utilizando tecnicas de instrumentacion electronica y comunicacion por radio-frecuencia. La red fue proyectada con el protocolo floating base sensor network (FBSN) que implementa una topologia adhoc con seleccion aleatoria de nodos. Los prototipos construidos fueron utilizados para efectuar colectas de datos de la actividad electrica cerebral y temperatura corporal de seis novillas de raza Holandesa. A fin de optimizar la infraestructura, fue desarrollado un software que a partir de la simulacion del desplazamiento de un rebano bovino ayuda a determinar la mejor distribucion de esa infraestructura en el area monitorizada. Los resultados alcanzados mostraron que es posible utilizar redes de sensores inalambricas como tecnicas eficientes para obtener datos fisiologicos de bovinos.

Thermal Response to Heat in Buildings with Green Covers for Tropical Climate: Green Facades and Green Roofs

The main aims of this paper were to study and demonstrate the benefits the plant systems can provide indoors in a critical heat day. This study proposed an experimental method to try to understand the thermal response to heat of four different systems: a prototype called control (no vegetation) and three with different combinations of vegetation (green roofs and green facades) installed in a tropical climate region. The experiments were developed in four test cells with dimensions 2.0 m × 2.50 m × 2.71 m. Measurements of internal surface temperatures and internal air temperatures were collected with the use of specific equipment, a data logger (CR1000, Campbell Scientific Inc.), connected with two multiplexers 32 channels (416AM Campbell Scientific Inc.). Data were recorded over a year and a critical day heat was selected, which was September 24, 2015.The results show that the use of plant systems in buildings establishes a passive technique in reducing energy consumption because of the high incidence of summer solar radiation which is reduced and simultaneously, it maintains thermal internal conditions more pleasant than external ones, because of the best thermal behaviour, which was observed in the test cell with vegetation on both roofs and facades. The biggest difference between maximum internal air temperatures registered was 2 °C.

Um modelo de gestão baseado em e-science e data warehouse para aplicação no agronegócio

O presente artigo tem como objetivo descrever um sistema de gestao aplicado a pecuaria, atraves do monitoramento e identificacao de animal a distância utilizando tecnicas de comunicacao sem fio. Este sistema permitira o acompanhamento do animal durante o seu ciclo de vida, permitindo ao gestor inclusive, coletar dados telemetricos em tempo real. Esta coleta podera ser realizada localmente ou atraves de um acesso a internet, facilitando assim o gerenciamento e controle de produtividade e qualidade animal, pois o sistema podera gerenciar determinados elementos, tais como: temperatura, tempo de descanso, tempo em alimentacao dentre outros, formando assim um grande banco de dados (data warehouse) que podera ser acessado por varios pesquisadores criando um sistema e-science.

Methods of image acquisition and software development for leaf area measurements in pastures

Abstract The development of software for automated image processing, with particular emphasis on agricultural monitoring applications, has increased in the last years. Leaf area measurements are important for several crops and pastures, once the leaf area index is related with growth and photosynthesis rates, being an essential parameter of process-based models of vegetation. The processing algorithms implemented in most software for leaf area measurements currently available require the determination of leaf dimensions. Hence, the automated processing of samples with multiple leaves is still limited, frequently requiring manual pre-processing of the images. In order to develop a new software system aimed at processing images of samples composed of multiple leaves without any requirements of manual pre-processing of the images, the USP-Leaf software was developed. The software’s performance was compared by using different devices for image acquisition: a semiprofessional digital camera (Sony, resolution of 12 megapixels); a mobile phone (Lenovo k5, resolution of 5 megapixels) and a desktop scanner (HP B20, 300 dpi corresponding to 3.508 × 2.480 pixels). The results were validated by comparing the values obtained with the standard method (electronic planimeter model Li-Cor 3100). The experiment was carried out at the Faculty of Animal Science and Food Engineering (FZEA), University of Sao Paulo, Pirassununga, SP, Brazil. The leaf samples were obtained from Brachiaria decumbens Stapf. cv. Basilisk pastures. A total of 20 samples comprising 15 leaves were collected, from which the images were acquired with each device. Edge detection, filtering and thresholding algorithms were applied to identify the leaf section of the image against the background. Considering the leaf area measured with the electronic planimeter, the relative error rate of the software’s estimates was lower than 7%, being highest when the scanner was used and lower with the digital camera. Pearson’s correlation coefficients were higher than 95%, regardless of the device used for image capturing, indicating that the software was able to provide accurate estimates of leaf area. The linear regression equation associated with the estimated leaf area using the mobile phone showed the highest values for the intercept and the higher standard error associated with this parameter (2.9 ± 5.69), despite showing a slope close to 1 (1.0 ± 0.07). The leaf area estimates were close to the standard method, showing that the software’s performance was not affected by the device used for image acquisition.

Thermal Behaviour in Buildings with Green Covers Combined with Natural Ventilation, Green Facades and Green Roofs

The main aim of this paper was to study the influence of ventilation during a typical experimental day, in the internal air temperature as well as in internal surface temperatures under the conditions of the outer environment, using an experimental method which allows a comparison of the thermal performance between four cell tests: a prototype called control (no vegetation) and three with different combinations of vegetation (roofs and facades) installed in a region of tropical climate. The experiments were developed in four test cells with dimensions 2.0 m × 2.50 m × 2.7 m. Measurements of internal surface temperatures and internal air temperatures were collected with the use of specific equipment, a data logger (CR1000, Campbell Scientific Inc.), connected with two multiplexers 32 channels (416AM Campbell Scientific Inc.). Data were recorded over a year and a typical heat day was selected, which was September 24, 2015. The results show that ventilation affects the internal temperature of the air, so that this gets even surpass the external temperature. Regarding surface temperatures, increased temperature, except those which are provided with vegetation, namely, the surfaces which have green walls and green roofs file the lower temperatures. Therefore, we can confirm the ability of vegetation to maintain more pleasant internal conditions compared to the test cells built with conventional materials, thus it can reduce cooling load efficiency.

Ensinando os fundamentos de redes de sensores sem fio usando um sistema simples

The electronic monitoring using wireless sensor network is a human knowledge that has boon investigated in order to improve their functional capabilities and incoming applications. This paper aim to present an educational system that able basic physics concept, concerned to the wireless sensor communications, to be more comprehensive.

A wireless data acquisition system for cattle behavior monitoring in zootechnics E-Science

portuguesEste artigo estuda a viabilidade de um sistema de monitoramento e coleta de dados atraves da WEB, com a construcao de um e-Science Zootecnico. Foram utilizadas tecnicas de modelagem orientada a objetos, linguagens de programacao php, C++, Java e banco de dados MySql para a elaboracao do ambiente compu- tacional. O sistema de hardware, o dispositivo eletronico de comunicacao e os protocolos de monitoramento foram desenvolvidos utilizando o protocolo Float Base Sensor Network e tecnicas de instrumentacao eletronica. Para testar o siste- ma desenvolvido, foi realizado um experimento com 6 animais da raca Holstein equipados com dispositivos de coleta de dados. O ambiente expe- rimental foi equipado com 6 antenas fixas e uma câmera IP. Os resultados obtidos mostraram a eficiencia do sistema de coleta e de recepcao dos dados atraves das antenas distribuidas na area. A metodologia usada no projeto, bem como os resultados do experimento, permitem concluir que o objetivo de gerenciar e monitorar o animal duran- te um experimento, com a coleta de dados telemetricos em tempo real foi alcancada, alem de possibilitar o deslocamento livre do animal durante a coleta dos dados. EnglishThis paper studies the feasibility of a system of monitoring and data collection via the web, with the construction of an e-Science Zootechnical. Object-oriented modelling techniques were used and programming languages: php, C++, Java and MySql database for development of the computing environment. The system hardware, electronic communication device, and monitoring protocols were developed using the Float Base Sensor Network Protocol and techniques of electronic instrumentation. To test the system, an experiment was conducted with six Holstein animals equipped with data collection devices. The experimental environment was equipped with six antennas and a fixed IP camera. The results showed the efficiency of the collection system and receiving data through the antennas distributed in the area. Considering the methodology used in the project, as well as the results of the experiment, is possible conclude that, with the telemetric data collection in real time, the management and monitoring the animal during an experiment can be done, in addition to allowing free movement of the animal during the data collection.

Uma análise de deslocamento de rebanho bovino através dos modelos random walk e browniano

The present article simulate the movement of bovine herd through the aleatory movements random walk and brownian, trying to analyze which of those predicts the movement better of bovine herd displacement, defining parameters and describing the algorithms used in both movements and using them in the construction of the events of the simulator. With the construction of the simulator it was possible the analysis of the movements, besides the understand that model of displacement better if apply of bovine herd displacement. Also it was possible an analysis of space acting for the construction of the location nets and identification of the herd through of wireless sensor network.