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For Cornell University Department of Physics in 2015-2026, the graph shows 97 visible PIs and 138 internal PI collaborations. The main research signal is Physics and Astronomy as the leading field (42% of slots across 74 PIs; 74 labels), Nuclear and High Energy Physics as the leading subfield (13% of slots across 30 PIs; 30 labels), and Cosmology and Gravitation Theories as the leading topic (7% of slots across 20 PIs; 20 labels). That is a healthy pattern, with enough links to reveal several interpretable groups rather than one undifferentiated component. The most prominent PIs by weighted works are Olivier Elemento (82.9 weighted works; Cancer Genomics and Diagnostics, Bioinformatics and Genomic Networks). The clearest collaboration lines are Kin Fai Mak and Jie Shan (64 shared works, weight 27.6). The strongest breakdown groups are group 1 with 9 PIs, 8 internal connections, weight 53.1, around Materials Chemistry, Atomic and Molecular Physics, and Optics, Structural Biology, led by David A. Muller, Lena F. Kourkoutis, Gregory D. Fuchs.