Estimates of HZE particle contributions to SPE radiation exposures on interplanetary missions.
Estimates of radiation doses resulting from possible HZE (high energy heavy ion) components of solar particle events (SPEs) are presented for crews of manned interplanetary missions. The calculations assume a model spectrum obtained by folding measured solar flare HZE particle abundances with the measured energy spectra of SPE alpha particles. These hypothetical spectra are then transported through aluminum spacecraft shielding. The results, presented as estimates of absorbed dose and dose equivalent, indicate that HZE components by themselves are not a major concern for crew protection but should be included in any overall risk assessment. The predictions are found to be sensitive to the assumed spectral hardness parameters.
Composition of Solar Energetic Particles
The present measurements of elemental abundances in 15 large solar energetic particle events confirm the existence of two major effects: systematic differences between solar energetic particle abundances and photospheric abundances that are approximately correlated with first ionization potential (implying that the solar corona is the likely source population for these particles), and an enhancement of heavy ion abundances relative to a baseline of solar energetic particle abundances whose magnitude increases with rising atomic number. These data suggest the possibility that the degree of heavy ion enhancement has some correlation with spectral slope, and confirm that the aforementioned effects are not due to time or energy variations within individual events. The maximum column density above the solar acceleration region is less than 0.1 g/sq cm, on the basis of these data.
Educational innovation in Musical Language Course: responses and the overcoming of limitations
This article presents an innovative methodological proposal for the development of auditory education in the course of the Language of Music. Based on this proposal, we analyze an educational community’s response to the innovations implemented, and we identify the limitations recognized throughout the learning and teaching process, as well as the strategies developed to overcome them. To this end, we applied a qualitative methodology with the classroom-based research method. The compilation of data was carried out through participant observation, captured in the journals of the professor and researcher, interviews and analysis of documents. The research results demonstrate that patience, responsibility and perseverance in their work on behalf of the professors have been key to overcoming the limitations identified and in promoting that students enjoy and learn their class contents in meaningful ways. Recibido 05/02/2018 Aceptado: 09/03/2018