Artículos de revistas
Authenticity and versioning of learning objects using the digital signature infrastructure of Costa Rica
Alpizar-Chacon, I., & Chacon-Rivas, M. (2016). Authenticity and versioning of learning objects using the digital signature infrastructure of Costa Rica. Institute of Electrical and Electronics Engineers Inc.
There are a large number of educational resources available on the Internet through different repositories. However, authenticity methods of learning objects has not been widely adopted by repositories, making it difficult to verify the authors of the content. To solve this problem, our goal is to aid users and authors of learning objects to have a trusted verification of authenticity and versioning of learning objects by applying digital signatures into the lifecycle of learning objects. In our propose, after a learning object is uploaded to a repository, the author presents his/her digital certificate, a special LOM record is created with the information from the author’s certificate, and then it is signed to prove its authenticity. The signature is produced using digital certificates issued by the digital signature infrastructure of Costa Rica, which guarantees legal binding and trust over time. We hope to propose a generic framework than can be implemented in any repository.
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Self-organized criticality in the substorm phenomenon and its relation to localized reconnection in the magnetospheric plasma sheet Klimas, A. J.; Valdivia Hepp, Juan; Vassiliadis, D.; Baker, D. N.; Hesse, M.; Takalo, J. (Blackwell Publishing Ltd, 2000)Evidence is presented that suggests that there is a significant self-organized criticality (SOC) component in the dynamics of substorms in the magnetosphere. We assume that observations of bursty bulk flows, fast flows, ...
Particle-in-cell simulation of incoherent scatter radar spectral distortions related to beam-plasma interactions in the auroral ionosphere Diaz, M. A.; Oppenheim, M.; Semeter, J. L.; Zettergren, M. (Blackwell Publishing Ltd, 2011)An electrostatic parallel particle-in-cell (EPPIC) code that allows for particle beam injections and multiple boundary conditions is used to investigate the beam-plasma interaction and its manifestations in the incoherent ...
Sitnov, M. I.; Sharma, A. S.; Papadopoulos, K.; Vassiliadis, D.; Valdivia Hepp, Juan; Klimas, A. J.; Baker, D. N. (Blackwell Publishing Ltd, 2000)The behavior of substorms as sudden transitions of the magnetosphere is studied using the Bargatze et al.  data set of the solar wind induced electric field vBs and the auroral electrojet index AL. The data set is ...