Abstract: A portable nuclear material detector generally includes a scintillating fiber radiation sensor, a light detector, a conditioning circuit, a frequency shift keying (FSK) circuit, a fast Fourier transform (FFT) circuit, an electronic controller, an amplitude spectral addition circuit, and an output device. A high voltage direct current (HVDC) source is provided to excite the light detector, while a separate power supply may be provided to power the remaining components. Portability is facilitated by locating the components of the detector within a handheld-sized housing. When bombarded by gamma particles, the radiation sensor emits light, which is detected by the light detector and converted into electrical signals. These electrical signals are then conditioned and converted to spectral lines.

Abstract: The apparatus of this invention are multiple fish surrogates that each have plurality of piezoelectric and triaxial accelerometer sensors for emulating sensory organs of a particular fish. The multiple fish surrogates are immersed in flowing water intakes of a hydraulic structure such as: intakes, intake bypasses, and diversion structures; or also natural geological formation such as riffles, shoal areas, and pools. The invention is used for acquisition of acoustic and fluid dynamic data in or near these hydraulic structures and natural formations. To accomplish this, multiple sensors in multiple fish-shaped physical enclosures are deployed at the same time to describe a fish's aquatic environment at locations such as in proximity to a dam's intake. Since such an intake exhibits turbulent and high energy flow fields that cannot be characterized by a single sensor, many sensor bodies are required for a complete characterization of the environment.

Abstract: A ground condition monitor includes a housing for disposal underground, a power source disposed in the housing, and a controller disposed in the housing and in communication with the power source and with a plurality of sensors. The sensors are adapted to receive signals from the controller and in response thereto to send electromagnetic excitation signals into surrounding earth, receive reflective electromagnetic signals from the surrounding earth, and feed the reflective signals to the controller, which is adapted to convert the reflective signals to data indicative of electromagnetic properties of the surrounding earth, and to transmit the data.