Abstract: Methods, computer program products, and systems for use in near field communications systems for authenticating at a near field communications receiver, a user of a near field communications transmitter. The system includes a data receiver for receiving a signal comprising a first unique identifier from a near field communications transmitter. The system also includes a received signal strength indicator for measuring a signal strength of the received signal. The system further includes a signal strength tracker for tracking a variation with time of the signal strength of the received signal and converting the variation with time into a second unique identifier. The system further includes a comparator for comparing the received first unique identifier and the tracked and converted second unique identifier and for outputting a signal indicating the result of the comparison. The user is authenticated if the signal indicates that the first and second identifiers correlate correctly.

Abstract: A tuning pin for pianos and other string instruments being of one diameter size for approximately one-third of its length and of another diameter for the remainder of its length.

Abstract: A piano tuning pin apparatus for prevention of loosening of the piano string, i.e., of rewinding of a piano tuning pin, characterized by setting the tuning pin constructed additionally a brake structure having the impediment function against the rewinding on the circumference surface of the piano tuning pin and the fixing portion of pin having two putting pipes each other, to prevent loosening of the piano. Between a tuning hammer tip inserting part and a hole of the tuning pin, a brake structure is formed to take a projection having a suitable distance and height along with a circumference surface.

Abstract: In an electronic musical instrument of the waveshape memory type including at least one waveshape memory for storing and reproducing sample values of a musical sound wave to be generated, the waveshape memory stores the sample values of the complete waveshape of a musical tone with a shaped envelope.

Abstract: A tuning pin having a threaded portion is provided with grooves formed in the direction substantially perpendicular to a screw winding direction of the threaded portion. In accordance with another embodiment, the pitch of the screw threads varies on at least part of the threaded portion.

Abstract: A tuning pin for pianos and like instruments being of the usual configuration except for the neck portion on which the string is wound which is reduced in diameter only on the side which the string leaves the pin thus forming a pin neck which is more elliptical than circular in shape, the reduced side of which has a less acute curve for the string to bend around and is closer to the center of axes of the pin which reduces the torsional effect of the string on the pin and subsequent slippage of the pin in the block.