Abstract: A method of measuring strain in a test specimen comprises the steps of placing a pattern of marks on a surface of the test specimen, wherein the pattern of marks includes a plurality of target marks and a plurality of sets of coded marks, using the sets of coded marks to identify locations of at least two of the target marks, and using a change in distance between at least two of the marks to determine strain in the test specimen. An apparatus that performs the method is also provided.

Abstract: A device and a method are provided to allow a user to ream a hole to an accurate final diameter as desired, and at the same time, to cold work the hole to induce a beneficial residual stress that will enhance the life of the component by retarding the onset and growth of fatigue cracks in the hole. The basic design of the device has an elongated body having a forward end portion to extend through a hole to be reamed and cold worked, a reamer section formed on the circumference of the forward end portion to enlarge the hole, and a burnishing section formed on the circumference of the elongated body adjacent to the reamer. The burnishing section is operative to upset the material around the hole, so as to result in a residual stress beneficial to the hole. The reamer section is in the form of a plurality of cutting edges extending from a tip of the elongated body, while the burnishing section is also in the form of a plurality of cutting edges adjacent to the reamer section along the elongate body.

Abstract: A digital wireless telecommunication device for reduced interference with hearing aids includes an assistive listening device detector. The assistive listening device detector identifies the presence of different types of assistive listening device signals. In response to such a signal, the assistive listening device detector generates a reduced interference demand signal. Reduced interference digital wireless telecommunication output signals are generated in response to the reduced interference demand signal. The reduced interference digital wireless telecommunication output signals are typically in the form of full rate transmitter output signals. A variety of techniques are disclosed to produce the full rate transmitter output signals. The reduced interference digital wireless telecommunication output signals minimize disruptions to hearing aids in the vicinity of the digital wireless telecommunication device.