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The development and implementation of a new tension Kolsky bar system for testing brittle materials is proposed in this effort.  Due to the relatively low failure stress and strain of brittle materials tested in tension, it is difficult for researchers to obtain axial stress equilibrium in the sample using a traditional Kolsky tension bar system.  The lack of axial stress equilibrium during th ...

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The Geiger-Müller tube (or G-M tube) tube is in common use as a dose rate sensor. However, it is expensive for large-scale deployment, requires a high voltage and counting circuitry to operate, and requires several tubes in the device, if a large dose rate range is to be covered. Many alternative detector technologies exist. Many of them can be mass produced at reasonable price, but they are eith ...

Most AI accelerator hardware, such as GPU and TPU, are focused on increasing the throughput and efficiency for training and inference algorithms by massively parallelizing the computation across distinct computing unit and processors. Massive parallelization has to be powered by the continuous shrink of transistor nodes. Unfortunately, an increasing number of barriers are inhibiting the scaling of ...

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Radio Frequency (RF) Fingerprinting is an important capability for the warfighter to identify threats and protect against malicious attacks on the RF spectrum. Most RF Fingerprinting techniques work by identifying small variations in a transmitted signal that are introduced by hardware components (capacitors, inductors, etc) of the transmitter within the non-linear regions of operation. Neural Net ...

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Free-space optical communication (FSOC) provides a much higher modulation bandwidth than RF communication. Narrow optical beams provide enhanced security, although they are much more sensitive than RF to platform disturbances and the atmosphere. Turbulence causes beam wander, broadening, and breakup (scintillation) on the transmit laser and dynamic aberrations at the receiver, especially when the ...