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Reverse problem-based learning - a case study with a Braille machine
Felgueiras, Manuel C.; Fidalgo, André V.; Alves, Gustavo R.Engineering Education includes not only teaching theoretical fundamental concepts but also its verification during practical lessons in laboratories. The usual strategies to carry out this action are frequently based on Problem Based Learning, starting from a given state and proceeding forward to a target state. The possibility or the effectiveness of this procedure depends on previous states and if the present...
Adapting remote labs to learning scenarios: case studies using VISIR and RemotE...
Fidalgo, André V.; Alves, Gustavo R.; Marques, Maria A.; Viegas, C.; Costa-Lobo, Cristina; Henandez-Jayo, Unai; Garcia-Zúbia, Javier; Gustavsson, IngvarRemote laboratories are an emergent technological and pedagogical tool at all education levels, and their widespread use is an important part of their own improvement and evolution. This paper describes several issues encountered on laboratorial classes, on higher education courses, when using remote laboratories based on PXI systems, either using the VISIR system or an alternate in-house solution. Three main i...
A mobile robot platform for open learning based on serious games and remote lab...
Iturrate, Iñigo; Martín, Gustavo; Garcia-Zúbia, Javier; Angulo, Ignacio; Dziabenko, Olga; Orduña, Pablo; Alves, Gustavo R.; Fidalgo, André V.Within the pedagogical community, Serious Games have arisen as a viable alternative to traditional course-based learning materials. Until now, they have been based strictly on software solutions. Meanwhile, research into Remote Laboratories has shown that they are a viable, low-cost solution for experimentation in an engineering context, providing uninterrupted access, low-maintenance requirements, and a height...
Using remote labs to serve different teacher's needs a case study with VISIR an...
Fidalgo, André V.; Alves, Gustavo R.; Marques, Maria A.; Viegas, C.; Costa-Lobo, Cristina; Hernandez, U.; Garcia-Zúbia, Javier; Gustavsson, IngvarRemote Laboratories are an emergent technological and pedagogical tool at all education levels, and their widespread use is an important part of their own improvement and evolution. This paper describes several issues encountered on laboratorial classes, on higher education courses, when using remote laboratories based on PXI systems, either using the VISIR system or an alternate in-house solution. Three main i...
Real-time fault injection using enhanced on-chip debug infrastructures
Fidalgo, André V.; Gericota, Manuel G.; Alves, Gustavo R.; Ferreira, José M.The rapid increase in the use of microprocessor-based systems in critical areas, where failures imply risks to human lives, to the environment or to expensive equipment, significantly increased the need for dependable systems, able to detect, tolerate and eventually correct faults. The verification and validation of such systems is frequently performed via fault injection, using various forms and techniques. Ho...
Using test infrastructures for (remote) online evaluation of the sensitivity to...
Fidalgo, André V.; Alves, Gustavo R.; Felgueiras, Manuel C.; Gericota, Manuel G.This paper proposes an online mechanism that can evaluate the sensitivity of single event upsets (SEUs) of field programmable gate arrays (FPGAs). The online detection mechanism cyclically reads and compares the values form the external and internal configuration memories, taking into account the mask information. This remote detection method also signals any mismatch as a result of a SEU that affects both used...
A comparative analysis of fault injection methods via enhanced on-chip debug in...
Fidalgo, André V.; 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 u...
Real time fault injection using a modified debugging infrastructure
Fidalgo, André V.; Alves, Gustavo R.; Ferreira, José M.Dependability is a critical factor in computer systems, requiring high quality validation & verification procedures in the development stage. At the same time, digital devices are getting smaller and access to their internal signals and registers is increasingly complex, requiring innovative debugging methodologies. To address this issue, most recent microprocessors include an on-chip debug (OCD) infrastructure...
Real time fault injection using enhanced OCD -- a performance analysis
Fidalgo, André V.; Alves, Gustavo R.; Ferreira, José M.Fault injection is frequently used for the verification and validation of dependable systems. When targeting real time microprocessor based systems the process becomes significantly more complex. This paper proposes two complementary solutions to improve real time fault injection campaign execution, both in terms of performance and capabilities. The methodology is based on the use of the on-chip debug mechanism...
Using NEXUS compliant debuggers for real time fault injection on microprocessors
Fidalgo, André V.; Gericota, Manuel G.; Alves, Gustavo R.; Ferreira, José M.As electronic devices get smaller and more complex, dependability assurance is becoming fundamental for many mission critical computer based systems. This paper presents a case study on the possibility of using the on-chip debug infrastructures present in most current microprocessors to execute real time fault injection campaigns. The proposed methodology is based on a debugger customized for fault injection an...
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