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An Interpretable Machine Learning Approach to Understanding the Relationships between Solar Flares and Source Active Regions

Cavus, Huseyin, Wang, Jason T. L., Singampalli, Teja P. S., Coban, Gani Caglar, Zhang, Hongyang, Raheem, Abd-ur, Wang, Haimin

arXiv.org Artificial Intelligence

Solar flares are defined as outbursts on the surface of the Sun. They occur when energy accumulated in magnetic fields enclosing solar active regions (ARs) is abruptly expelled. Solar flares and associated coronal mass ejections are sources of space weather that adversely impact devices at or near Earth, including the obstruction of high-frequency radio waves utilized for communication and the deterioration of power grid operations. Tracking and delivering early and precise predictions of solar flares is essential for readiness and catastrophe risk mitigation. This paper employs the random forest (RF) model to address the binary classification task, analyzing the links between solar flares and their originating ARs with observational data gathered from 2011 to 2021 by SolarMonitor.org and the XRT flare database. We seek to identify the physical features of a source AR that significantly influence its potential to trigger >=C-class flares. We found that the features of AR_Type_Today, Hale_Class_Yesterday are the most and the least prepotent features, respectively. NoS_Difference has a remarkable effect in decision-making in both global and local interpretations.


Building the SHAKTI Microprocessor

Communications of the ACM

Microprocessors and microcontrollers form the core of electronic systems. Unfortunately, almost all the microprocessors and microcontrollers are imported, currently. IPs and patents with strict licensing terms protect their designs. Realizing the limitations of the processor industry, the SHAKTI Processor Program11 started as an academic initiative back in 2014. SHAKTI is an open source processor4 initiative by the Pratap Subramaniam–Center for Digital Intelligence and Secure Hardware Architecture (PC-CDISHA)–Reconfigurable Intelligent Systems Engineering (RISE) group, IIT-Madras.