ISEP – DEE – Comunicações em eventos científicos
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Browsing ISEP – DEE – Comunicações em eventos científicos by Author "Alves, Gustavo R."
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- An educational remote laboratory for controlling a signal conditioning circuit with an LDR sensorPublication . Costa, Ricardo; Bastos, Paulo; Alves, Gustavo R.; Felgueiras, Carlos; Fidalgo, AndréIn the past few years, the technologic evolution of communication and information systems had a major impact in our lives. In education, this evolution broke some geographical barriers, facilitating students’ access to real laboratories using a simple device connected to the Internet, contributing therefore to improve teaching and learning methods. To support this evolution, this paper describes a remote laboratory that provides students’ access to a typical electronic instrumentation system. Through a set of webpages, users can remotely control a light intensity sensed through a Light Dependent Resistor (LDR) sensor connected in an arm of a configurable Wheatstone Bridge (WB), whose output differential voltage are amplified / attenuated by an Instrumentation Amplifier (IA) circuit. Through this laboratory, users are able to control several components of a typical instrumentation system, visualize changes and analyze some measurements, in the same way as they would do in a traditional hands-on laboratory. An overview of the developed remote laboratory and a contextualization within other available solutions are presented in this paper. At the end, some considerations for its adoption in education are described.
- A bibliometric analysis of 10 years of EDUCON (2010-2019)Publication . Costa, Alexandra R.; Alves, Gustavo R.; Moura, A.In this paper we present a bibliometrics analysis of the 10 editions of the Global Engineering Education Conference (EDUCON). EDUCON is a conference of the IEEE Education Society for region 8. It started in 2010 and since then it is organized annually. With this study we intend to analyze the growth of the conference, namely through the evolution of the number of submissions/publications, and the number of citations per article. We also intend to analyze the number of references per article. A descriptive statistics of these indicators is done along the paper. With an initial set of 10 editions, it will be possible to investigate the impact of future editions, by performing a sliding-frame analysis, i.e. replacing the oldest by the newest edition and analyzing how this impacts the presented charts.
- Board-level prototype validation: a built-in controller and extended BST architecturePublication . Alves, Gustavo R.; Amaral, T.; Ferreira, José M.Prototype validation is a major concern in modern electronic product design and development. Simulation, structural test, functional and timing debug are all forming parts of the validation process, although very often addressed as dissociated tasks. In this paper we describe an integrated approach to board-level prototype validation, based on a set of mandatory/optional BST instructions and a built-in controller for debug and test, that addresses the late mentioned tasks as inherent parts of a whole process
- A Built-In Controller and Extended BS architecture for Prototype Debug and TestPublication . Alves, Gustavo R.; Amaral, Telmo; Ferreira, J. M.Prototype validation is a major concern and hardship in modern electronic products design and development. Simulation, structural test, functional debug, and timing debug are all constituting parts of the validation process, although very often they are addressed as independent and dissociated tasks. In this paper we describe an integrated approach to board-level prototype validation, based on a set of mandatory / optional BST instructions and a built-in controller for debug and test, that addresses the late mentioned tasks as inherent parts of a whole process.
- Classification of Experimental Errors Done in VISIR with Simple Alternated Current CircuitsPublication . Mendonca, Lucas Nascimento; Macaneiro, Mayara; Alves, Gustavo R.; Pires, Danubia Soares; Garcia-Zumbia, Javier; Cuadros, Jordi; Serrano, VanessaDuring experiments with electric circuits, students often make mistakes. To handle these situations, remote laboratories such as VISIR (Virtual Instruments Systems in Reality) rely on error-handling mechanisms, which do not always cover all errors. This article seeks to extend a previously published work when trying to assimilate all possible errors in alternated current circuits with a single power supply and a single passive component. The goal is to build an errors’ map with all possible errors, covering all circuits that can be assembled in VISIR, from the simplest to the most complex. This allows limiting misconceptions during theoretical and practical understanding are limited.
- A comparative analysis of fault injection methods via enhanced on-chip debug infrastructuresPublication . Fidalgo, André Vaz; Alves, Gustavo R.; Gericota, Manuel G.; Ferreira, José M.On-chip debug (OCD) features are frequently available in modern microprocessors. Their contribution to shorten the time-to-market justifies the industry investment in this area, where a number of competing or complementary proposals are available or under development, e.g. NEXUS, CJTAG, IJTAG. The controllability and observability features provided by OCD infrastructures provide a valuable toolbox that can be used well beyond the debugging arena, improving the return on investment rate by diluting its cost across a wider spectrum of application areas. This paper discusses the use of OCD features for validating fault tolerant architectures, and in particular the efficiency of various fault injection methods provided by enhanced OCD infrastructures. The reference data for our comparative study was captured on a workbench comprising the 32-bit Freescale MPC-565 microprocessor, an iSYSTEM IC3000 debugger (iTracePro version) and the Winidea 2005 debugging package. All enhanced OCD infrastructures were implemented in VHDL and the results were obtained by simulation within the same fault injection environment. The focus of this paper is on the comparative analysis of the experimental results obtained for various OCD configurations and debugging scenarios.
- Cooperación internacional para el desarrollo y uso de laboratorios remotos para la enseñanza de la físicaPublication . Concari, Sonia Beatriz; Arguedas-Matarrita, Carlos; Marchisio, Susana Teresa; Lerro, Federico; Plano, Miguel Ángel; García Zúbia, Javier; Hernández Jayo, Unai; Silva, Juarez Bento Da; Alves, Gustavo R.Un laboratorio remoto es un recurso tecnológico que integra dos aspectos esenciales de las Tecnologías de la Información y la Comunicación (TIC): la experimentación real realizada a través de Internet, junto a software y hardware para la adquisición de datos y cálculo. Los laboratorios remotos constituyen un recurso didáctico relevante para la enseñanza de las ciencias experimentales, en particular de la Física. Si bien la existencia de laboratorios remotos ha evidenciado un importante crecimiento en los últimos años, las instituciones educativas que ya cuentan con estos recursos están localizadas principalmente en los países desarrollados de Europa mientras que, en Latinoamérica, solo seis países disponen de estos recursos para la enseñanza, siendo heterogéneo el grado de desarrollo y experiencia de los mismos. Un paso adicional en el desarrollo de estos recursos para la enseñanza a través de la experimentación es el de compartir los laboratorios remotos ya desarrollados permitiendo a la comunidad educativa de distintas instituciones, el acceso y uso de sus laboratorios remotos, de modo que un estudiante pueda hacer más experimentos y que un experimento pueda ser hecho por más estudiantes. En este trabajo se informa sobre experiencias en Argentina, Costa Rica y Brasil, devenidas de la cooperación entre instituciones educativas y organizaciones europeas y americanas, sobre desarrollo, acceso y uso compartido de laboratorios remotos para la enseñanza de temas de Física. Las actividades de cooperación posibilitaron la instalación de nuevos laboratorios y el uso compartido de otros. Como producto de ello, se desarrollaron acciones de capacitación de docentes y uso de los laboratorios remotos para la experimentación en cursos regulares de ciencias, ingeniería y de formación de profesores en los países mencionados.
- Dashboard for the VISIR remote labPublication . Garcia-Zubia, Javier; Cuadros, Jordi; Serrano, Vanessa; Hernandez-Jayo, Unai; Angulo-Martinez, Ignacio; Villar, Aitor; Orduna, Pablo; Alves, Gustavo R.The VISIR dashboard (VISIR-DB) is a learning analytics tool connected with the VISIR remote lab. In VISIR, every action performed by a student from the interface over the remote laboratory and back is logged and recorded. VISIR-DB helps visualizing, in a fast and deep way, the recorded logs from this communication. Using this tool, a teacher can analyze and understand better how the students are using the remote lab during their learning process on analog electronics. With this information, the VISIR platform can be improved and the use of remote labs can be better understood.
- Debug and Test of Microcontroller Based Applications Using the Boundary Scan Test InfrastructurePublication . Alves, Gustavo R.; Aga, Daniel; Mosuc, Ovidiu; Ferreira, J.M.Microcontroller based applications are usually debugged with the assistance of In-circuit emulators and logic analysers. However, these traditional debug tools represent a huge investment for use in classes with several groups of students working at the same time. The development of a new low-cost debug tool that uses the Boundary Scan Test infrastructure to implement the basic functionality provided by an In-circuit emulator and a logic analyser is a possible solution to overcome this economical problem. To reduce costs the Boundary Scan Test infrastructure is controlled through the parallel port of a normal Personal Computer, now widely available in classrooms.
- Educational application of remote experimentation for mobile devicesPublication . Rochadel, Willian; Simão, J. P. Shardosim; Silva, Juarez Bento da; Alves, Gustavo R.In this article the authors describe the application development RExMobile and the importance of remote experimentation via mobile devices, especially smartphones simple, beyond the space provided for this application in education. The article deals the creation, software and hardware that provide an interactive and dynamic way to attract more students to use these experiments remote, serving as support to teachers to science teaching from its initial series. The ease and availability of smartphones, even these students of basic education, permits the reach of new users and in different places. Thus, the practice of remote experimentation in mobile devices enables new spaces for access and interaction. Are used for developing software free or low cost, HTML5 and jQuery Mobile framework, that enable the creation of pages compatible with different mobile operating systems such as iOS, Android, Windows Phone, some Symbian, among others. Also are demonstrated patterns layouts that allow greater accessibility.