Abstract: A time-dependent magnetic field and/or flux is implemented to determine information related to geological formations within the geologic volume of interest. Such information may include one or more of location, boundary or shape, pressure, faults, lithology, strength, and/or other information. A source of the time-dependent magnetic field and/or flux may leverage the operation of an excavation tool used to excavate a hole at or near the geologic volume of interest in order to generate the magnetic field and/or flux. A plurality of different sources may be used to generated the magnetic field and/or flux.

Abstract: Apparatus for sending cryptographic key information through a turbulent medium features a radiation generator in a first enclosure for emitting radiation at a predetermined wavelength through first launching means for launching the radiation into turbulent media. A second launching means in a second enclosure is located a distance from the first enclosure for receiving the radiation launched from the first launching means after the radiation has traversed the turbulent media, and focusing the radiation onto detection means for determining a unique cryptographic key.

Abstract: A one-part moisture curable polyurethane adhesive composition comprises a blend of polyurethane prepolymers and one or more additives which unexpectedly improve the sag resistance and mechanical properties of the formulation. The final adhesive composition retains good stability in the absence of moisture for an extended period between manufacture and application of the adhesive, and has a relatively rapid and consistent cure rate in the presence of atmospheric moisture. The final cured composition exhibits good mechanical properties and generally is unaffected by ambient application and cure conditions.