Abstract: Described herein are surgical lights comprising: a plurality of light generating units, each light generating unit comprising: at least one first light emitter that emits light having a first spectrum, at least one second light emitter that emits light having a second spectrum, and at least one optical element configured to mix the light from the at least one first and second light emitters such that the light generating unit emits light that is a mixture of the first and second spectrums; and a controller configured to adjust relative intensities of the at least one first light emitter and the at least one second light emitter to adjust a spectrum of light generated by the plurality of light generating units.

Abstract: Various preservatives and compositions incorporating these preservatives as well as various methods of using these preservatives and compositions are described. For example, various compositions that include cosmetic and pharmaceutical compositions containing a preservative such as 3-(heptyloxy)propane-1,2-diol and one or more other ingredients (e.g., natural ingredients) are described.

Abstract: A surgical light for illuminating a target with light that has a reduced contribution of a portion of the visible spectrum includes a first light source configured to emit light having a first spectrum; a second light source configured to emit light having a second spectrum that does not include the portion of the visible spectrum; and a controller configured to simultaneously activate the first and second light sources for illuminating the target with light that has a reduced contribution of light in the portion of the visible spectrum relative to white light.

Abstract: A surgical light for illuminating a target with light that has a reduced contribution of a portion of the visible spectrum includes a first light source configured to emit light having a first spectrum; a second light source configured to emit light having a second spectrum that does not include the portion of the visible spectrum; and a controller configured to simultaneously activate the first and second light sources for illuminating the target with light that has a reduced contribution of light in the portion of the visible spectrum relative to white light.

Abstract: A pedestrian safety lighting device and system configured to mount to and be used in connection with existing traffic signals and intersections and increase awareness of pedestrians and vehicles of one another on a roadway is provided. In some embodiments, the pedestrian safety lighting device and system comprises a housing, at least one light source, a communication means, and a power source. More specifically, the communication means is configured to receive external data from the same or a different traffic signal, selectively illuminate the light source, and generate and transmit internal data to the same or a different traffic signal, or a data center. In further embodiments, the device and system may also comprise a light directing element, a light processing element, one or more sensors, a speaker, a camera, and a microphone.

Abstract: A pedestrian safety lighting device and system configured to mount to and be used in connection with existing traffic signals and intersections and increase awareness of pedestrians and vehicles of one another on a roadway is provided. In some embodiments, the pedestrian safety lighting device and system comprises a housing, at least one light source, a communication means, and a power source. More specifically, the communication means is configured to receive external data from the same or a different traffic signal, selectively illuminate the light source, and generate and transmit internal data to the same or a different traffic signal, or a data center. In further embodiments, the device and system may also comprise a light directing element, a light processing element, one or more sensors, a speaker, a camera, and a microphone.

Abstract: A photochromic polymer comprising at least one siloxane oligomer and at least two photochromic groups covalently linked to one or both terminuses of the siloxane oligomer and compositions containing photochromic siloxane polymers with narrow polydispersity. The photochromic polymer enhances switching speed in rigid host polymers.

Abstract: A low profile, mobile system for therapeutic application of heat such as far infrared (“FIR”) heat to an affected area of an individual's body including straps and a pad, the pad including a plurality of FIR emitting discs and heaters. The FIR emitting discs are ceramic discs of cordierite made of a mixture of magnesium oxide, aluminum oxide, silicon oxide and/or trace elements. The heat application system is designed for simple operation via a single button.

Abstract: A photochromic polymer comprising at least one siloxane oligomer and at least two photochromic groups covalently linked to one or both terminuses of the siloxane oligomer and compositions containing photochromic siloxane polymers with narrow polydispersity. The photochromic polymer enhances switching speed in rigid host polymers.

Abstract: A press for attaching a fastener to belting. The press includes a support structure, an anvil, a punch and a clinching block. The anvil is fixedly positioned on the support structure. The punch and the clinching block are attached to the support structure such that they are movable between a first position and a second position. The clinching block is configured to engage a first fastener positioned between the clinching block and the anvil as the clinching block moves between the first position and the second position such that the fastener is clinched between the anvil and the clinching block. The punch is configured to engage a second fastener as the punch moves between the first position and the second position such that the second fastener is preclinched between the anvil and the punch.

Abstract: A wafer antenna comprises a wafer substrate, a plurality of antenna elements integrated on the wafer substrate for radiating and receiving a radio frequency signal, an electrical connection integrated on the wafer substrate; a feed network integrated on the wafer substrate for distributing the RF signal from the electrical connection to the antenna elements and from the antenna elements to the electrical connection, and a plurality of tunable dielectric phase shifters integrated on the wafer substrate with each of the tunable dielectric phase shifters coupled to a corresponding one of the antenna elements and controlling the phase of the RF signal coupled to the corresponding one of the antenna elements.

Abstract: Parallel plate tunable varactors having a bulk capacitance contribution to a total capacitance increased compared to a fringing capacitance contribution are disclosed. The contribution of the bulk capacitance to the total capacitance of an exemplary BST varactor is increased by increasing the area/perimeter ratio of the active region, thereby improving the tunability and other properties of the varactor. In an exemplary embodiment, an active region of the varactor has a lateral shape with a perimeter that is less than a perimeter of an equivalent area square. In various exemplary embodiments, the shape of the active region may be substantially circular or substantially octagonal. Methods for fabricating and designing such varactors are also disclosed.

Abstract: A circuit topology is configured to flatten out a phase- and amplitude-response over a specified range of frequencies. The circuit topology also provides a large cumulative phase-shift. In one embodiment, the circuit topology cascades a plurality of all-pass sections, with the center-frequencies of each all-pass section staggered to create a substantially flat phase-response over a frequency range. Further, in one embodiment the plurality of all-pass sections has at least one all-pass section that is different from another all-pass section. Each all-pass section includes a tunable capacitor and has a center-frequency that can be varied by electronically tuning the capacitor. Each center frequency is selected to obtain substantially constant amplitude and phase response over a desired frequency range and capacitance tuning range.

Abstract: A self-tuning variable impedance circuit provides improved performance. A variation in the power applied to the variable impedance circuit causes a corresponding change in the impedance of the circuit, resulting in improved performance. For example, the variable impedance circuit may be a matching circuit that “follows” the output power of a power amplifier, thereby increasing the power efficiency of the power amplifier.

Abstract: Controlled phase shift in the operation of an RF antenna element is achieved by selectively choosing between different modes of antenna element resonance. Additional phase control resolution is achieved by combining this with other types of phase shifters. Such phase shifters are especially useful within a phased array of RF antenna radiator elements.

Abstract: A combined test fixture and spatial-power-combined amplifier includes a base, a first waveguide mounting flange engaged to said base, a second waveguide mounting flange engaged to said base, a waveguide input fixed to said first flange, a waveguide output fixed to said second flange, an amplifier array disposed between said first flange and second flange, said array comprising a plurality of semiconductors for amplifying a signal, and a spacer for spacing apart said semiconductors. A plurality of amplifier cards constitute the array, with the cards being disposed in various arrangements which include a linearly stacked arrangement and radially stacked arrangement. The first and second waveguide mounting flanges are constructed to slide along the base to enable the amplifier array to be easily changed.

Abstract: A palladium-nickel alloy is plated on electrical components, such as frames, pins, connectors and in general various types of electrical contacts. The palladium-nickel alloys are deposited from a plating bath containing a palladosammine chloride, nickel sulfamate, ammonium sulfamate and ammonium hydroxide, the latter operative to solubilize the metals into the ammonia complex and to maintain the necessary bath pH. The bath can be used for either rack plating at current densities of 10 to 25 amperes per square foot or to barrel plate at a plating current of 1 to 3 amperes per square foot.

Abstract: This invention relates to the palladium plating of electrical parts, such as frames, pins, connectors and in general various types of electrical contacts. More particularly, this invention relates to a method and composition for high speed electroplating of uniform, bright palladium deposits over a wide operating current density range using a palladosammine chloride plating bath to which sodium sulfite has been added. The method is adapted for rack plating of parts having an irregular shaped configuration as well as those having a uniform configuration.