Abstract: A spray gun has a base body, a liquid-conducting device and a fastening nut, wherein the thread has a recess and the liquid-conducting device has at least one element which is radially projecting from a central liquid-conducting tube, the element fitting into the recess, so that, after unscrewing the fastening nut, the liquid-conducting device can be gripped at the projecting element in order to withdraw the liquid-conducting device from the base body. Further, a set includes a liquid-conducting device with a liquid-conducting tube, in which is arranged a sleeve with a bore.

Abstract: Modified substrates are provided having nano- or microscale wells, tracks, channels, pores or perforations. Also provided are methods of making the same.

Abstract: In one embodiment, an electronic assembly includes a flexible circuit board formed into a curved shape that is configured to be substantially concentric with a viewer's eye. The electronic assembly further includes a plurality of facets coupled to a side of curved shape of the flexible circuit board that is configured to face the viewer's eye. Each facet has a planar face, one or more emitters configured to emit light towards the viewer's eye, and one or more receptors configured to detect the emitted light after it has been reflected back towards the electronic assembly from a retina of the viewer's eye. Each face is normal to a line pointing towards a center area of the viewer's eye when the curved shape is substantially concentric with the viewer's eye. Each facet is individually addressable such that the plurality of facets are configurable to detect a center of gaze of the viewer.

Abstract: A rotor blade assembly of an aircraft. The rotor blade assembly includes a blade attachment assembly rotatable with respect to a rotor hub assembly of the aircraft about a blade fold axis, and a pitch control assembly. The pitch control assembly includes a horn mount attachable to the rotor hub assembly, and a teeter bar hingedly attached to the horn mount at an interface, the interface defining a pitch control fold axis. The pitch control assembly is foldable about the pitch control fold axis when the pitch control fold axis is aligned with the blade fold axis.

Abstract: A communication device includes a session and mobility management block configured to interface with a mobility management entity (MME) of an evolved packet core (EPC) of an evolved packet system (EPS). An access non-LTE air interface circuit is configured to communicate with an access network gateway. An EPS inter-working functional block including mapping and coordination logic is configured to map and coordinate a plurality of functionalities associated with the access non-LTE air interface circuit into corresponding functionalities associated with the session and mobility management block.

Abstract: In one embodiment, an electronic display assembly includes a circuit board, a first microlens layer on a first side of the circuit board, and a second microlens layer on an opposite side of the circuit board from the first microlens layer. The first microlens layer includes a first plurality of microlenses, and the second microlens layer includes a second plurality of microlenses. The electronic display assembly further includes an image sensor layer adjacent to the first microlens layer and a display layer adjacent to the second microlens array. The image sensor layer includes sensor pixels for detecting incoming light through the first microlenses, and the display layer includes display pixels for emitting light through the second microlenses. The electronic display assembly emulates transparency by emitting light from the second microlenses at angles that correspond to angles of the incoming light detected through the first microlenses.

Abstract: A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.

Abstract: The present disclosure relates to apparatuses and methods to utilize techniques to simultaneously measure Ramsey pulses on a plurality of axes of the magneto-optical defect center material with defect centers. When measuring simultaneously, there is potentially no relative sensitivity loss relative to scalar measurements. Therefore, Ramsey pulses on a plurality of axes of a magneto-optical defect material with defect centers are measured while bypassing the sensitivity loss incurred with sequential measurement techniques. The axes are interrogated simultaneously while allowing for isolation of the individual responses from the signal detected from the magneto-optical defect center material. In some embodiments, the system utilizes a special Ramsey pulse sequence pair or a ‘shifted magnetometry adapted cancellation’ (SMAC) pair to detect and measure the magnetic field acting on the system.

Abstract: A receiver signal is sampled at a sampling rate equivalent to a chip rate at which chips of a known signal are timed. The resulting receiver signal samples are segmented into receiver signal segments, which are filtered by respective matched filters that are matched to known signal segments segmented from the known signal. Indexes are assigned to elements of the resulting filter response sequences to define an array thereof. Frequency transforms are computed of elements of the filter response sequences in respective columns of the array. Indexes are assigned to elements of the resulting frequency response sequences to define another array thereof. Channel effects imparted on a radio signal are jointly estimated from characteristics of the other array at which at least one local maximum is located.

Abstract: An autonomous tensioner system that is coupled to a conveyor belt scraper includes a motor that generates a first drive torque and a gearing assembly coupled to the motor such that the gearing assembly is actuated in response to the motor generating the first drive torque. The gearing assembly generates a second drive torque in response to receiving the initial drive torque generated by the motor and the second drive torque is greater than the first drive torque. The autonomous tensioner system includes an output member coupled to the gearing assembly and the conveyor belt scraper. The output member receives the second drive torque from the gearing assembly and rotates in response, thereby generating a rotational torque. The conveyor belt scraper receives the rotational torque from the output member and simultaneously moves at a torque greater than the first drive torque generated by the motor.

Abstract: The present invention relates to methods and apparatuses for determining the ratio of oxidized and reduced forms of a redox couple in solution, each method comprising: (a) contacting a first stationary working electrode and a first counter electrode to the solution; (b) applying a first potential at the first working electrode and measuring a first constant current; (c) applying a second potential at the first working electrode and measuring a second constant current; wherein the sign of the first and second currents are not the same; and wherein the ratio of the absolute values of the first and second currents reflects the ratio of the oxidized and reduced forms of the redox couple in solution.

Abstract: Parasitic reactions, such as production of hydrogen and oxidation by oxygen, can occur under the operating conditions of flow batteries and other electrochemical systems. Such parasitic reactions can undesirably impact operating performance by altering the pH and/or state of charge of one or both electrolyte solutions in a flow battery. Electrochemical balancing cells can allow rebalancing of electrolyte solutions to take place. Electrochemical balancing cells suitable for placement in fluid communication with both electrolyte solutions of a flow battery can include: a first chamber containing a first electrode, a second chamber containing a second electrode, a third chamber disposed between the first chamber and the second chamber, an ion-selective membrane forming a first interface between the first chamber and the third chamber, and a bipolar membrane forming a second interface between the second chamber and the third chamber.

Abstract: A method for making conformal non-planar multi-layer circuitry is described. The method can include providing a substrate having a non-planar surface and depositing a first conformal dielectric layer on the substrate, the first conformal dielectric layer conforming to the non-planar surface of the substrate and having a non-planar surface. The method can also include applying a first conformal circuitry layer on the first conformal dielectric layer. The method can include depositing a second conformal dielectric layer on the first conformal circuitry layer, the second conformal dielectric layer conforming to a non-planar surface of the first conformal circuitry layer, and applying a second conformal circuitry layer on the second conformal dielectric layer. Successive layers can be sequentially deposited.

Abstract: Some embodiments include a countermeasure assistance system that, in response to detecting a threat to an aircraft, calculates and presents via a user interface an instruction to assist a pilot in evading the threat. For example, the system may determine a direction to which the aircraft should be turned to present a beam of the aircraft toward the threat, which may assist in evading a radar-enabled threat. The system may calculate a shortest turn to present the beam to the threat. The system may additionally display information regarding a position, nature, and degree of the threat, including through formatting of at least a portion of a user interface for displaying information regarding the threat. The system may additionally calculate and display an intervisibility zone for the threat and for the aircraft's current position to further assist the pilot in navigating to an area at which the threat may be evaded.

Abstract: An antenna system includes an antenna array including a number of antenna elements disposed on a substrate. Each antenna element includes a radiation layer, a ground plane layer, a feed layer and an additional ground plane layer. The ground plane layer includes a ground plane conductive layer that has a number of slots. The feed layer includes a feed structure to excite the slots. A dual polarization feature of the antenna array is realized via the slots, and the slots are separated by the ground plane conductive layer.

Abstract: A one-piece heat exchanger manufactured using an additive manufacturing process is described. The heat exchanger includes a plurality of channels formed therein. At least some of the plurality of channels may be configured to provide structural support to the heat exchanger to reduce its weight. Different coolant media may be used in a first set and a second set of the plurality of channels to provide different types of cooling in an integrated one-piece heat exchanger structure.

Abstract: A gas barrier material includes an atomic sheet, such as graphene and/or an analog of graphene. The gas barrier material can be arranged as part of a component, such as a container or other vessel, to limit the flow or permeation of gas through the component. Where the component is a container or part of a container, the gas barrier material may be formulated and arranged to limit or prevent gas ingress or egress with respect to the internal volume of the container. The atomic sheet offers improved gas barrier properties compared to traditional polymeric barrier materials and is particularly useful in applications where it is desired to limit permeation of small gas molecules such as helium, such as airships or other lighter than air vehicles.

Abstract: A helicopter includes a gimbal assembly, a first rotor assembly, a second rotor assembly, a fuselage, and a controller. The first rotor assembly, the second rotor assembly, and the fuselage are mechanically coupled to the gimbal assembly. The first rotor assembly includes a first rotor and the second rotor assembly includes a second rotor, the first rotor including a plurality of first fixed-pitch blades and the second rotor including a plurality of second fixed-pitch blades. Each of the plurality of first and the second fixed-pitch blades are coupled to a hub of its respective rotor via a hinge mechanism that is configured to allow each of the fixed-pitch blades to pivot from a first position to a second position, the first position being substantially parallel to the fuselage and the second position being substantially perpendicular to the fuselage.

Abstract: A system for magnetic detection of an external magnetic field is described. The system includes a controller configured to control components of the system. The controller is configured to control an optical excitation source and a RF excitation source to apply pulse sequences to a magneto-optical defect center material such that in the excitation pulses of a first pair of RF excitation pulses have a first phase difference, the excitation pulses of a second pair of RF excitation pulses have a second phase difference, and the second phase difference is different from the first phase difference. The controller computes a combined magnetometry curve as a function of the RF excitation frequency based on a difference between a measured value of a first light detection signal and a measured value of a second light detection signal. The controller sets the first phase difference and the second phase difference based on the combined magnetometry curve.