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A. Takio Kitagawa, Geisler, R. Wegner, Nogueira, K. Thayenne P., and Rocha, E., ?The Influence Of Solar Activity On High-Frequency Communications: A Systemic Risk To Global Communication?, HamSCI. HamSCI, Newington, CT, 2026.\par \par A. Takio Kitagawa, ?Unauthorized Use Of Military Satellites: Threats To Mission Security And Integrity?, HamSCI Workshop 2026. HamSCI, Newington, CT, 2026.\par \par A. Takio Kitagawa, Maffezzolli, A. Carolini, de Oliveira, A. Carolina H., and Brandl, E., ?Investigation of Electromagnetic Wave Propagation in CB Radio with Elementary Students:  A 'Super Bowl' Mystery?, HamSCI Workshop 2025. HamSCI, Newark, NJ, 2025.\par \par A. Takio Kitagawa, ?Quality of AM Radio Reception at Night and Daytime for Future Use in Natural Disaster Situations?, HamSCI Workshop 2024. HamSCI, Cleveland, OH, 2024.\par \par A. Takio Kitagawa, ?Use of the Short Wave Radio to prove the ionosphere with students from a public school in Brazil?, HamSCI Workshop 2021. HamSCI, Scranton, PA (Virtual), 2021.\par \par }