Abstract: A change detection device may include a variational autoencoder (VAE) configured to encode image data to generate a latent vector, and decode the latent vector to generate new image data. The change detection device may further include a controller configured to select a deep learning model from different deep learning models based upon the new image data and a game theory reward matrix, and process the new image data using the selected deep learning model to detect changes therein.

Abstract: Hunting arrow utilizes an arrowhead having a ferrule and a plurality of blades, and a cutting ring is secured to the blades. The blades are secured to the ferrule by a tip and by a retainer nut adjacent to the shaft. Different configurations of rings may be utilized, and the rings may be secured to the outer or inner portions of the blades. Different configurations of both arrowheads and rings which may be secured to an arrow shaft are illustrated and discussed.

Abstract: An arrow includes a relatively long shaft, with a front shaft portion adjacent to an arrowhead, and the front portion is designed to collapse upon impact so that the rear part of the shaft, the relatively long portion, is reusable after the collapsed, front portion, is removed from the rear portion of the arrow. The two arrow portions are appropriately secured together, but the securing together is not "permanent". Rather, the securing is of such a nature that the two portions may be separated, with the collapsed portion discarded. The rear portion, the relatively long portion, may be reused by remating it to another front, collapsible portion.