Report summary

University of California, Berkeley Department of Mechanical Engineering in 2015-2026 reads as a 115-PI network with 104 internal PI collaborations. The research center of gravity is Engineering as the leading field (45% of slots across 94 PIs; 94 labels), Biomedical Engineering as the leading subfield (10% of slots across 30 PIs; 30 labels), and Additive Manufacturing and 3D Printing Technologies as the leading topic (3% of slots across 9 PIs; 9 labels). Overall the pattern is balanced: there is enough structure to identify active groups, while the field mix still leaves room for multiple research identities. The most prominent PIs by weighted works are Robert O. Ritchie (85.3 weighted works; Calcium Carbonate Crystallization and Inhibition, Bone Tissue Engineering Materials); Liwei Lin (85 weighted works; Advanced Sensor and Energy Harvesting Materials, Supercapacitor Materials and Fabrication). The strongest pairings are Masayoshi Tomizuka and Changliu Liu (18 shared works, weight 15.3); Boris Rubinsky and Matthew J. Powell‐Palm (33 shared works, weight 15). The strongest breakdown groups are group 1 with 10 PIs, 9 internal connections, weight 34, around Mechanics of Materials, Materials Chemistry, Biomedical Engineering, led by Grace X. Gu, Costas P. Grigoropoulos, K. Komvopoulos; group 2 with 10 PIs, 9 internal connections, weight 46.8, around Control and Systems Engineering, Biomedical Engineering, Computer Vision and Pattern Recognition, led by Xiang Zhang, Masayoshi Tomizuka, Claire J. Tomlin.