Telecommunications networks have been with us for a long time, and every year new technologies emerge that make our day-to-day life easier. With the arrival of the third generation, we obtained an improvement in the internet service in the sense that we could obtain higher speeds. This gave way to a very wide path to continue with the networks. Thus comes the fourth generation network with the intention of being compatible, interoperable and convergent for all telecommunications services, also, with a high internet speed, greater capacity, improvements in its antennas and signal quality. One of its problems remains the unpredictability of its service as it is not entirely stable in its speed because it depends on the region and the users connected to the network. This article helps to know the characteristics of the third and fourth generation mobile networks, their evolution over time and talks about the changes and innovations that will bring the fifth generation mobile network (5G).
To publicize the results of research carried out in the fields of engineering and applied sciences, and in any other specialty, it is necessary to write a scientific article. This has a specific format called IMRAD method, which includes introduction, methods, results and discussion. In it, graphs, tables, figures and own designs of the methods used in the study can be included. A set of tools and general recommendations are offered to students and researchers in engineering and applied sciences in order to improve their preparation for the challenge of communicating science to their peers, the general public and decision makers. Suggestions for the typical preparation of a manuscript, recommendations for good practice in writing scientific articles and links to resources available on the web are included in the article.
Remote surveillance is a security weapon all over the world. The freedom market also called «M’zee Laurent Désiré Kabila» is one of the largest markets in Kinshasa, located in the Commune of Masina in the DRC. Thus, the security of sellers and their goods is essential. The objective of this article is to set up a remote surveillance network by IP camera via fiber optics. The daytime IP cameras and alarms are installed in different access points of the said market. The images captured by the IP cameras in this environment are transmitted to the WIN APPLICATION server (Database) installed in the control room, also called monitoring (server) for their processing (reading, storage, visualization, and printing). The results obtained show the feasibility of the optimal video surveillance project on the detection of suspicious elements. Surveillance cameras do not protect against burglaries but allow burglars to be unmasked.
In this article the analysis of implementation of the technique of genetic algorithms for the adjustment of the optimum of the quadrics is carried out. A set of sample points of the quadric, which may possibly contain noise and therefore may represent in the fitting, a different geometric figure from the one from which they come, are defined and will be used to fit the quadric which best represents these points. The purpose of this work is the application of GA (Genetic Algorithms) for an optimization problem, in which this technique has been very appropriate in solving the different problems. We seek to obtain a greater knowledge of GA, as well as a better understanding of what an implementation of this technique entails in any problem.
In image processing, it is often essential to remove the noise from the image since this noise is an anomaly which degrades its quality, while making its visual interpretation difficult. The purpose of filtering is to eliminate the effect of these disturbances by trying not to touch the essential information of the image (contours, dynamics, and textures). This article describes the development of a Gaussian filter for noise reduction in medical images, the ggfilter function is designed for the calculation of the filter matrix and the convolution process, the tests on different parameters show the advantage of use 7x7 windows and σ= 0.5.
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