Abstract: A method for determining depth to basement from aeromagnetic data utilizes neural networks to automate the laborious process of profile interpretation. The neural networks provide consistency, accuracy and overall quality without bias of interpretation.

Abstract: A pistol grip has twin abutments projecting in parallel relationship and spaced apart to straddle an orthodontic bracket attached to a tooth and to engage the tooth at opposite sides of the bracket. A swing handle pivoted to the pistol grip carries a pull wire extending between the abutments such pull wire has a loop for hooking a wing of the orthodontic bracket. The handle can be pulled toward the pistol grip to draw the pull wire toward the pistol grip for pressing the abutments against the tooth and simultaneously pulling the bracket off the tooth. During such pulling, constriction of the arch wire slot in the bracket is prevented by fitting in such slot a spacer hook of a tenaculum.

Abstract: An absorbent material is prepared by treating a substrate with an aqueous monomer dispersion of an acrylate salt and a cross-linking monomer and thereafter irradiating the treated substrate with high energy ionizing radiation to form a cage matrix of the polymer and monomer substrate. The absorbent material can be swelled with a solution containing a volatile additive to dispense said additive over a period of time.

Abstract: A new and improved seismic survey cable, and method of seismic exploration with such a cable is disclosed. The system has detectors or hydrophones spaced in the cable so as to achieve a detector density conforming to a Gaussian frequency distribution within a specified frequency band to reduce noise in the survey data.