Abstract: This disclosure is related to devices, systems, and techniques for determining an acceleration. For example, an accelerometer system includes a proof mass, a pole piece connected to the proof mass, and a coil disposed around the pole piece and connected to the proof mass, where the coil is rectangular in shape. Additionally, the accelerometer system includes circuitry configured to deliver an electrical signal to the coil in order to maintain the proof mass at a null position and determine an electrical current value corresponding to the electrical signal. Additionally, the circuit is configured to identify, based on the electrical current value, an acceleration of the accelerometer system.

Abstract: Techniques to determine whether the design of integrated circuit (IC) has been tampered with during wafer manufacturing by using an enhanced library and layout methodology. The enhanced library may include location sensitive cells networked together in a mesh architecture where paths through the mesh can be used to detect relative position of location sensitive cells. The techniques further include algorithms that fill any unused space on an IC with additional elements from the enhanced library to minimize the opportunity to modify the IC by including additional circuit function or manipulating the layout. By physically locking down the circuit placement such that there is no available area and gives improved ability to detect changes in the physical location behavior of the circuit, therefore reduces the risk that unauthorized circuit manipulation will go undetected.

Abstract: A single motor, two axis searchlight system includes a shaft, a motor, at least a first plurality of light sources, and a controller. The shaft is mounted for rotation about a rotational axis. The motor is coupled to the shaft and is operable to rotate the shaft about the rotational axis. The first plurality of light sources are coupled to the shaft and are rotatable therewith about the rotational axis. The first plurality of light sources are disposed along a first plane that is disposed at a first angle relative to the rotational axis. The controller is in operable communication with the motor and the first plurality of light sources. The controller configured to: selectively energize the motor to thereby cause the first plurality of light sources to rotate about the rotational axis, and selectively energize one or more of the first plurality of light sources.

Abstract: An analytical system includes a laser disposed to direct light toward a microfluidic feature disposed in a feature layer of a multiple layer test cartridge, a sensor to receive reflections from capping layers disposed about the microfluidic feature in the feature layer, and a controller to determine a depth of the microfluidic feature as a function of the received reflections.

Abstract: Turbine engine systems for interstage particle separation in multistage radial compressors are disclosed. The multistage radial compressor system includes an interstage region positioned between a first stage radial compressor and a second stage radial compressor. The interstage region includes a radially-outward oriented section, a longitudinally-oriented section, and a radially-inward oriented section. The radially-outward oriented section transitions to the longitudinally-oriented section at a first approximately 90-degree bend, and the longitudinally-oriented section transitions to the radially-inward oriented section at a second approximately 90-degree bend. The multistage radial compressor system further includes a particle separation system including an extraction slot and an aspiration slot located downstream from the extraction slot. The particle separation system is positioned along the interstage region outside of the air flow path.

Abstract: Systems and methods for estimating attitude and heading are provided. The systems and methods utilize carrier phase single difference (CSD) measurements or carrier phase double difference (CDD) measurements and a validation test for CSD or CDD measurement residuals. The systems and methods include applying a wrapping function with limit of ±half of the GNSS carrier signal wavelength to CSD or CDD measurement residuals to generate refined CSD or CDD measurement residuals and validating the refined CSD or CDD measurement residuals variance to determine valid CSD or CDD measurements. By using the validated CSD and CDD measurements, the systems and methods enable low grade hybrid inertial navigation systems to estimate attitude and heading with integrity and without a magnetometer or the need for integer ambiguity resolution even during the static or steady phases of flight/operation.

Abstract: Embodiments relate generally to a filter (110), for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter (110). Embodiments typically comprise a dustproof membrane (114) and a waterproof membrane (113). Some embodiments may also comprise a splash-proof cap (130) and/or features to reduce negative pressure on the filter (110).

Abstract: Systems and methods for dynamic locking of optical path times using entangled photons are provided. A system includes an optical source for generating bi-photons; tracer laser beam sources for generating tracer laser beams; telescopes that emit the tracer laser beams and the bi-photons to remote reflectors, each bi-photon traveling along an optical path in a pair of optical paths toward a corresponding remote reflector, wherein the telescopes receive reflected bi-photons from the remote reflectors; and communication links, wherein the optical source respectively communicates with first and second remote reflectors through a first and second communication link. Also, the optical source uses the tracer laser beams and the communication links to respectively point the bi-photons towards the remote reflectors.

Abstract: A method of producing purified bis(fluorosulfonyl) imide includes providing a liquid mixture including bis(fluorosulfonyl) imide and fluorosulfonic acid and then contacting the liquid mixture with gaseous ammonia. The gaseous ammonia reacts with the fluorosulfonic acid to produce ammonium fluorosulfate. The method further includes separating the liquid mixture from the ammonium fluorosulfate.

Abstract: Integrating location information in a fire control system is described herein. One device includes a memory, and a processor configured to execute executable instructions stored in the memory to receive, from a database external to the fire control system, a graphical representation of a facility and location information associated with a number of components of the fire control system that indicates a location of each respective component in the facility, integrate the location information associated with each respective component of the fire control system in the graphical representation of the facility such that the graphical representation includes a representation of each respective component at a location in the graphical representation that corresponds to the location of that component in the facility, and display, in a user interface, the graphical representation of the facility with the location information associated with each respective component of the fire control system integrated therein.

Abstract: Systems and methods for increasing the reliability of a wireless communication connection in a connected system are provided. Such systems and methods can include a control panel, a wireless access point that connects the control panel to the Internet via a first wireless communication connection, and a connection reliability module coupled to the wireless access point. In some embodiments, when the control panel detects a fault on the first wireless communication connection, the control panel can transmit a signal to the connection reliability module via a second wireless connection that is different than the first wireless connection, and responsive to receiving the signal, the connection reliability module can power cycle the wireless access point.

Abstract: A system implementing a method for generating a navigation output is provided. The method includes determining a gravitational anomaly estimate based at least in part on inertial sensor data and navigation output; generating navigation and sensor corrections that are due at least in part on inherent sensor errors that include vertical accelerometer/gravimeter corrections from at least a navigation output estimate, the gravitational anomaly estimate, and the gravity map data; and generating the navigation output based on the inertial sensor data, gravity map data and the navigation and sensor corrections.

Abstract: Methods and systems are provided for optimization of an aircraft flight trajectory with shortcuts. The method comprises retrieving an active flight plan stored in a flight management system (FMS) and identifying a potential shortcut with a shortcut advisor tool. The FMS monitors the location of the aircraft with respect to an identified start point of the potential shortcut. Prior to the aircraft's arrival at the identified start point, current key performance indicators (KPI) of the shortcut are evaluated with the shortcut advisor tool. The aircrew is alerted to the potential shortcut along with a preview of the performance of the aircraft upon accepting the potential shortcut. The aircrew may accept the addition of the potential shortcut to the flight plan and request approval of the shortcut by air traffic control (ATC). The active flight plan is updated with the shortcut upon approval from the ATC.

Abstract: Sub-diffraction endoscopic modal imaging systems and methods are disclosed herein. A single multi-mode fiber endoscope incorporated into a modal imaging system can facilitate the imaging of inner portions of a patient's body at a quantum-limited resolution. One method of sub-diffraction endoscopic modal imaging includes collecting incoming radiation with a multi-mode fiber, separating the output into multiple modes, and measuring an energy level of each mode to construct an image of the received incoming radiation.

Abstract: Systems and methods for pre-distortion pattern recognition are provided. In certain embodiments, the system includes an electronic device that provides an output signal, wherein the electronic device applies distortion to the output signal. The system also includes a pre-distorter that provides an input signal to the electronic device, wherein the pre-distorter applies a pre-distortion to the input signal before the electronic device receives the input signal. Further, the system includes a pre-distorter design block that identifies the distortion from an association between the output signal and a finite set of symbols and updates the pre-distortion based on the association.

Abstract: Apparatus and associated methods relate to a compact gas sensor (CGS) including a housing with a central stepped cavity with one or more first lead contact(s) forming a portion of a base plane in a bottom of the cavity and one or more second lead contact(s) forming a portion of a stepped plane higher than the base plane, the cavity sized to receive a chemically based stack of material made up of a bottom diffusion electrode layer, a middle electrolyte gel layer, and a top diffusion electrode layer. The bottom diffusion electrode layer is in electrical contact with the first lead contact(s). The top diffusion electrode layer electrically couples to the second lead contact(s) via an overlaying micro electromechanical system (MEMS) element layer with conductive coating. In an illustrative example, the CGS may provide gas sensing in small spaces.

Abstract: In an example, a node in a network includes four ports coupled to respective nodes via respective links. A first port and a third port are coupled to respective nodes via respective near links and a second port and a fourth port are coupled to respective nodes via respective skip links. The node further includes at least one processor configured to send a first message in a first direction via the second port, and the first message includes a first destination address that corresponds to the second side of the node. The at least one processor is further configured to send a second message in a second direction via the fourth port, and the second message includes a second destination address that corresponds to the first side of the node.

Abstract: In exemplary embodiments, a caged spring assembly is provided that includes a first end cap, a second end cap, a helical spring, and a locking post. The second end cap is opposite the first end cap. The helical spring extends between the first and second end caps. The locking post is disposed inside the helical spring between the first and second end caps. The locking post allows limited compression of the helical spring and prevents extension of the helical spring beyond a set point.

Abstract: In an example, a method includes forming a first self-checking pair including a self-checking node and a first node adjacent to the self-checking node in a network. The method further includes forming a second self-checking pair including the self-checking node and a second node adjacent to the self-checking node in the network, wherein the self-checking node is between the first node and the second node. The method further includes transmitting a first paired broadcast with the first self-checking pair and transmitting a second paired broadcast with the second self-checking pair.

Abstract: A method for calculating vertical trajectory values is provided. The method obtains aircraft performance data for a particular aircraft and atmospheric condition data associated with an air route; calculates a cost-efficient vertical trajectory for the air route, based on the aircraft performance data and the atmospheric condition data, wherein the cost-efficient vertical trajectory comprises a plurality of altitude values for minimizing cost for the particular aircraft during travel of the air route; obtains an altitude consistency threshold; and adjusts the cost-efficient vertical trajectory using the altitude consistency parameter, to create an optimized vertical trajectory for the aircraft route.