Departamento de Física
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/785
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Resultados da Pesquisa
- Banana and its nutrients: the power of the heart(2022-11-09) PALMA, M. S.; CURADO, J. F.; RIZZUTTO, M.; MEDINA, N. H.; Marcilei Aparecida Guazzelli© 2022 Institute of Physics Publishing. All rights reserved.Macro and micronutrients are essential minerals for the development of living beings, and this separation is given in quantitative reason, that is, while macronutrients, such as potassium and calcium, are required in larger amounts, micronutrients such as iron and zinc, are required in small quantities. For humans, potassium (K) is an essential macronutrient. In the human body, potassium has the function of regulating osmotic pressure, transmitting nerve impulses and carrying out muscle contraction. Its existence is found in high concentration in bananas. The heart banana plant is a little-known part among the by-products generated by banana cultivation, and is commonly discarded in the soil in order to increase its organic content, due to its high content of minerals such as potassium, calcium and zinc. Thus, this research work aimed to explore the nutritional potential of unconventional parts of banana for human consumption, through Energy Dispersion X-Ray Fluorescence technique, with which it is possible to identify and quantify the main constituent elements. The species were studied Musa Acuminata 'Dwarf/Cavendish', Musa Acuminata x M. Balbisiana 'Apple/Manzano', Musa Ornata 'Ornamental' and Musa Acuminata 'Fig'. The quantity of potassium and of other elements such as Ca, Fe, Mn, Zn, and Rb in the banana heart samples were studied superior to the findings in the literature.
- Heavy-Ion-Induced Avalanche Multiplication in Low-Voltage Power VDMosfet(2021-09-13) ALBERTON. S. G.; MEDINA, N. H.; ADDED, N.; AGUIAR, V. A. P.; Marcilei Aparecida Guazzelli; Roberto Santos© 2021 IEEE.Lackner's theory for avalanche multiplication in semiconductor devices provides physical interpretation for the model parameters and obtaining them through experimental methods is necessary. In this work, the charge collection mechanisms of heavy-ion-induced avalanche multiplication in power MOSFETs are studied based on Lackner's impact ionization model. The heavy-ion-induced impact ionization coefficients were estimated by comparing collected charge values obtained from computational simulations and experimental measurements.
- Charge deposition analysis of heavy-ion-induced single-event burnout in low-voltage power VDMOSFET(2022-10-05) ALBERTON, S. G.; AGUIAR, V. A. P.; MEDINA, N. H.; ADDED, N.; MACCHIONE, E. L. A.; MENEGASSO, R.; CESARIO. G. J.; SANTOS, H. C.; SCARDUELLI, V. B.; ALCANTARA-NUNEZ, J. A.; Marcilei Aparecida Guazzelli; Roberto Santos; FLECHAS, D.© 2022 Elsevier LtdThe heavy-ion-induced single-event burnout (SEB) risk in power MOSFETs (metal-oxide-semiconductor field-effect transistors) can be assessed in ground facilities, although it is costly and time-demanding. For this reason, there have been few experimental studies dedicated to investigate the relevant parameter related to the description of ion-induced SEB phenomenon. In this work the heavy-ion-induced SEB in a low-voltage power VDMOSFET (vertical double-diffused MOSFET) is studied using several ion-energy combinations. A self-consistent statistical analysis is carried out in order to elucidate the relationship between charge deposition and SEB triggering. Experimental data is compared to a predictive model from the literature for SEE (single-event effect) worst-case prediction in power MOSFETs, supporting for the first time its relevance to the worst-case prediction in the SEB mechanism.