A comparative study of applying Mason’s Rule in the case of flow-graphs and bond-graphs

The paper presents two methods to analyzethe electric circuits using the flow-graphs and thebond-graphs studying the differences between thesemethods.As it can be noticed, the two methods are totallydifferent; their common point being Mason’s rule thatis applied in both cases but it is applied differently foreach type of graphs

Medical diagnosis by using the motion information in image sequences

This paper consist in a comparative studybetween some differential motion estimation methodsthat could be applied in the case of medical diagnosisby using motion information in image sequences.The studied algorithms could be applied in the caseof the diagnosis of heart diseases, thyroid nodulardiseases, arteriosclerosis and other diseases thatimply the uses of image sequences. The paper aim tounderline some advantages and disadvantages ofseveral differential motion estimation methods inorder to allow to ease choose a certain motionestimation method for a certain application. Thestudied methods will be tested on MRI (MagneticResonance Imaging) images but the methods are notlimited only to this kind of data

Bond-graph Methods for Electric Circuits Analysis

The paper presents a bond-graph method for solving and analyzing an electric circuit with four or more circuit loops. Using this method, the time for circuit analysis is much shorter then using a classicalmethod. Besides determining the intensities of electrical currents through the sides of the circuit, the bond-graphs provide the possibility to obtain the transmittance of the analyzed system applying a fast working method. The main advantage of bond-graphs is the interaction with various areas of physics. The analyzedelectrical circuit could be a part of a complex physical system that could be modeled and analyzed as a unitary system by using bond-graphs

The bond-graph design of a motor used for electrical traction

In this paper the asynchronous motorwith cage, used for electrical traction is studied andanalyzed. For this motor we realized the associatedbond-graph, we pointed out the equations thatdescribe this motor, and we analyzed the electricaland mechanical features of this motor, by using thesimulation program 20 SIM, in order to improve theperformances of this motor even from the early stageof design

Current trends in scientific research in IT and Electrical and Electronics Engineering

From the vast research and development subjects in IT and Electrical and Electronics Engineering, some of the most important of them have been selected and are presented in this paper. Arguments that justify the chosen of these subjects among the most important in present are presented. The main selection criteria are the relevance for the current trends in these industries and the funding availability to insure the transition from theoretical and experimental research into practical applications. It might also help college students in shaping their preferences for a successful engineering carrier. Before approaching the specifics of the selected subjects the paper illustrates the interplay between learning strategies and scientific epistemological views to help framing an attitude toward science

The project for a dig out installation of the geothermal water with the help of solar energy

This installation realives the water pumpingfrom a well or fountain, in a feight vesse, with acentrifugal pump trained by an continuous, alternateelectrical engine, depending on the users preferences,feed from a solar battery through a system ofstabilizers and respectively of inverter of electricaltension

Performance Analysis of Turbo Codes, LDPC Codes, and Polar Codes over an AWGN Channel in the Presence of Inter Symbol Interference

This paper discusses the results of simulations relating to the performances of turbo codes, low density parity check (LDPC) codes, and polar codes over an additive white Gaussian noise (AWGN) channel in the presence of inter symbol interference, denoting the disturbances that altered the original signal. To eliminate the negative effects of inter symbol interference (ISI), an equalizer was used at the level of the receiver. Practically, two types of equalizers were used: zero forcing (ZF) and minimum mean square error (MMSE), considering the case of perfect channel estimation and the case of estimation using the least square algorithm. The performance measure used was the modification of the bit error rate compared to a given signal to noise ratio; in this sense, the MMSE equalizer offered a higher performance than the ZF equalizer. The aspect of channel equalization considered here is not novel, but there have been very few works that dealt with equalization in the context of the use of turbo codes, especially LDPC codes and polar codes for channel coding. In this respect, this research can be considered a contribution to the field of digital communications

NITROGEN FERTILIZATION OF PAIAGUÁS GRASS: PRODUCTION AND NUTRITION

Nitrogen (N) is a nutrient associated with the development of plant shoots, which makes it a vitally important element for the maintenance and sustainability of pasture. The goal of this study was to evaluate the effects of nitrogen fertilization on the productive and nutritional traits of Urochloa brizantha Paiaguás, as well as the efficiency of digital imaging and the use of a chlorophyll meter in obtaining green color indices. The experiment was conducted in the field on the Escola farm at the State University of Goiás, located in São Luís de Montes Belos, GO. A randomized-block design with five treatments and four replicates was adopted. Treatments consisted of four N rates (0, 75, 150, 300, and 600 kg ha‒1) in the form of ammonium sulfate. The grass responded up to the N rate of 374 kg ha‒1 for production-related traits, such as plant height, number of tillers, and shoot dry matter. Maximum dry matter yields were 21,225 and 13,710 kg ha‒1 yr‒1 for the first and second cycles, respectively. Both the chlorophyll meter and digital imaging were efficient in indicating plant N nutritional status. Paiaguás grass responds to N similarly to other Urochloa brizantha cultivars