Tecnura

27-36

Authors: Gabriel Elías Chanchí Golondrino, Franco Arturo Urbano Ordoñez, Wilmar Yesid Campo Muñoz

Video-streaming is a technology with major implications these days in such diverse contexts as education, health and the business sector; all of this regarding the ease it provides for remote access to live or recorded media content, allowing communication regardless of geographic location. One standard protocol that enables implementation of this technology is real time streaming protocol, or RTSP. However, since most application servers and Internet services are supported on HTTP requests, very little research has been done on generating tools for carrying out stress tests on streaming servers. This paper presents a stress measuring tool called Hermes, developed in Python, which allows calculation of response times for establishing RTSP connections to streaming servers, as well as obtaining RAM memory consumption and CPU usage rate data from these servers. Hermes was deployed in a video-streaming environment where stress testing was carried out on the LIVE555 server, using calls in the background to VLC and OpenRTSP open source clients

49-64

Authors: Mario Ricardo Arbulú Saavedra, Fernando Martínez Santa, Holman Montiel Ariza

This paper shows the analysis and the implementation methodology of the technique of dynamic systems roots location used in free-obstacle path planning for mobile robots. First of all, the analysis and morphologic behavior identification of the paths depending on roots location in complex plane are performed, where paths type and their attraction and repulsion features in the presence of other roots similarly to the obtained with artificial potential fields are identified. An implementation methodology for this technique of mobile robots path planning is proposed, starting from three different methods of roots location for obstacles in the scene. Those techniques change depending on the obstacle key points selected for roots, such as borders, crossing points with original path, center and vertices. Finally, a behavior analysis of general technique and the effectiveness of each tried method is performed, doing 20 tests for each one, obtaining a value of 65% for the selected method. Modifications and possible improvements to this methodology are also proposed.

79-92

Authors: Fabinton Sotelo Gómez, Armando Ordóñez, Mario Fernando Solarte

The learning management platforms (LMS) as Dot LRN (.LRN) have been widely disseminated and used as a teaching tool. However, despite its great potential, most of these platforms do not allow easy integration of common services on the Web. Integration of external resources in LMS is critical to extend the quantity and quality of educational services LMS. This article presents a set of criteria and architectural guidelines for the integration of Web resources for e-learning in the LRN platform. To this end, three steps are performed: first; the possible integration technologies to be used are described, second; the Web resources that provide educational services and can be integrated into LMS platforms are analyzed, finally; some architectural aspects of the relevant platform are identified for integration. The main contributions of this paper are: a characterization of Web resources and educational services available today on the Web; and the definition of criteria and guidelines for the integration of Web resources to .LRN

103-114

Authors: Daniel Ruiz Olaya, Edinson Franco Mejía

The experimentation laboratories for the studies of control system courses can become expensive, either in its acquisition, operation or maintenance. An alternative resource have been the remote laboratories. However, not always is possible to get complex systems. A solution to this matter are the remote emulation laboratories. In this paper describes the development of a Web application for the emulation of dynamic systems using a free-distribution software tool of rapid control prototyping based on Linux/ RTAI. This application is focused especially for the experimentation with dynamic systems that are not available easily in a laboratory where the model have been configured by the user. The design of the frontend and the back-end are presented. The latency times of the real-time operating system and the ability of the system to reproduce similar signals to a real system from an emulated model were verified. An example, to test the functionality of the application the model of an evaporator was used. One of the advantages of the application is the work methodology which is based on the development of blocks in Scicos. This allows the user to reuse those parameters and the code that was implemented to build a block on the Scicos toolbox with the Linux/RTAI/ScicosLab environment. Moreover, only a web-browser and the Java Virtual Machine are required

123-134

Authors: José Gregorio Arévalo Ascanio, Ramón Armando Bayona Trillos, Dewar Willmer Rico Bautista

In this article the structure of the business of the city of Ocaña is explored with the aim of expanding the information and knowledge of the main variables of the productive activity of the municipality, its entrepreneurial spirit, technological development and productive structure. For this, a descriptive research was performed to identify economic activity in its various forms and promote the implementation of administrative practices consistent with national and international references. The results allowed to establish business weaknesses, including information, which once identified are used to design spaces training, acquisition of abilities and employers management practices in consistent with the challenges of competitiveness and stay on the market. As of the results was collected information regarding technological component companies of the productive fabric of the city, for which the application of tools for the analysis of information systems is proposed using the ISO 27001: 2005, using most appropriate technologies to study organizations that protect their most important asset information: information

149-164

Authors: Juan Pablo Rodríguez Miranda, César Augusto García Ubaque, Janneth Pardo Pinzón

In water environmental planning in watersheds should contain aspects for the decontamination of receiving water body, therefore the selection of the treatment plants municipal wastewater in developing countries, you should consider aspects of the typical composition raw wastewater pollutant removal efficiency by technology, performance indicators for technology, environmental aspects of localization and spatial localization strategy. This methodology is built on the basis of technical, economic and environmental attributes, such as a tool for decision making future investments in treatment plants municipal wastewater with multidisciplinary elements.