Spectral clustering is a complex machine learning technique that uncovers patterns in data. Implementing it involves computing affinity and Laplacian matrices, eigenvector embeddings, and performing k-means clustering.
The US Federal Trade Commission warns against QR code scams that can take control of smartphones, make fraudulent charges, or obtain personal information. Scammers are targeting QR codes on parking lot kiosks, leading to look-alike sites that funnel funds to fraudulent accounts.