Abstract: An encryption method comprises: creating an asymmetric profile key comprising a multipart threshold key using a set of user devices; signing a declaration using the profile key and the set of user devices, the declaration identifying the set of user devices; creating an asymmetric location key comprising two multipart threshold keys; sharding and storing the asymmetric location key; creating a symmetric key; encrypting a file with the symmetric key; encrypting the symmetric key with the location key; and storing the encrypted file and encrypted key such that the encrypted file cannot be decrypted without decrypting the location key by a threshold of the set of user devices.

Abstract: A support structure for use with an existing single pole tower and a method for supporting additional loading of the existing pole tower are disclosed. The single pole tower has a pole anchored to an existing foundation and supports a first load. The support structure has a number of sleeves surrounding the pole with a bottom sleeve anchored to a new foundation surrounding the existing foundation. Load transfer plates are disposed between the existing tower and sleeves and load transfer bolts extending through the sleeves are torqued against the load transfer plates for stabilizing the loaded tower. One or more additional loads may be attached to one of the sleeves.

Abstract: A microscope stage includes a contrasting stage insert for providing contrast between a microscope stage and a specimen. The microscope stage insert has a color that is different from the color of the specimen. In a preferred embodiment, an upper stage includes a first color and a recess operatively arranged for receiving a removable complementary shaped contrasting stage insert therein. The contrasting stage insert has a second color that is different from the color of the upper stage, and more preferably, the specimen. The contrasting stage insert is configured for removable complementarily receipt in the recess.

Abstract: An at least aesthetically integral orthodontic appliance which is formed from an orthodontic base and a separately formed orthodontic body, as well as a method for making the same. In one embodiment, a base and body are separately formed by metal injection molding, the upper surface of the base having a pair of preferably mesio-distally extending alignment rails formed thereon. The lower portion of the body is positioned between these rails and forced into engagement with the base. The resulting assembly is thereafter heat treated to form an at least aesthetically appearing and preferably structurally integral orthodontic appliance by an amorphous blending of the interface between the base and body.

Abstract: An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.

Abstract: An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.

Abstract: Abrasion testing, and hence particle content of fluids including liquids and gases is carried out by abrading a thin film 25 of an electrical conductor with the fluid, and measuring the resulting change in electrical resistance of the film.The method can be used to monitor metal particles in oil, and hence the state of wear of oil-lubricated metal parts, and the level of particulate pollution in the atmosphere.

Abstract: An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.

Abstract: An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.