Titlebook: Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges; Yuuki Wada Book 2021 The Editor(s) (if applicable) and

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switches, VNFs are placed at the same time. We formalize the joint problem of switch upgrade and VNF placement (JSV), then prove it to be NP-hard. Then, a knapsack-based approximation algorithm is proposed to solve the JSV problem. Simulation results show that the algorithm can reduce the number of

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Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges

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978-981-16-0461-4The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapor

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Positrons from Proton-Rich Radionuclides,In this chapter, Monte-Carlo simulations are performed to quantitatively interpret the observational data. As physical processes, photonuclear reactions in the atmosphere and propagations of positrons produced by .-decay nuclei are considered. The simulation results are compared with our measurements.