Abstract: A handheld spectrometer apparatus and system for testing and characterizing samples. The spectrometer is connected to a mobile computing device and can be used to perform chemical analyses in the field. In one example, the spectrometer includes an optical system with a dichroic beamsplitter and a collection lens. The collection lens can be oriented along a first axis, and the dichroic beamsplitter oriented along a second axis that is at a 45-degree angle relative to the first axis. A photoreceptor of the spectrometer can capture image data as light passes through the optical system. The image data can be passed to a deep neural network (DNN) model on the mobile computing device that is trained to detect and quantify one or more contaminants.

Abstract: An apparatus, system, and methods to use a low-observable encryption device that includes an encryption unit; a communication unit; and a computing unit, wherein a microprocessor comprises two encryption units. The low-observable encryption device may also include an interchangable device. In some embodiments, the interchangable device comprises a computing unit, a software defined radio, an electrical to optical converter, or a combination thereof. In some embodiments, power is delivered by a USB port. In some embodiments, an input interconnect comprises an Ethernet interface, a USB interface, a Wi-Fi interface, a radio interface, a SATCOM interface, or a Bluetooth interface. In some embodiments, an output interconnect comprises an Ethernet interface, a USB interface, a Wi-Fi interface, a radio interface, a SATCOM interface, or a Bluetooth interface.

Abstract: An apparatus, system, and methods to use a low-observable encryption device that includes an encryption unit; a communication unit; and a computing unit, wherein a microprocessor comprises two encryption units. The low-observable encryption device may also include an interchangable device. In some embodiments, the interchangable device comprises a computing unit, a software defined radio, an electrical to optical converter, or a combination thereof. In some embodiments, power is delivered by a USB port. In some embodiments, an input interconnect comprises an Ethernet interface, a USB interface, a Wi-Fi interface, a radio interface, a SATCOM interface, or a Bluetooth interface. In some embodiments, an output interconnect comprises an Ethernet interface, a USB interface, a Wi-Fi interface, a radio interface, a SATCOM interface, or a Bluetooth interface.