Abstract: In some examples, a system includes a receiver configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a mixer configured to down-convert the received signals to intermediate-frequency (IF) signals based on a local oscillator signal. The system further includes at least one analog-to-digital converter configured to sample the IF signals at a sampling rate. A frequency band of the IF signals encoding the first message falls within a first Nyquist region, and a frequency band of the IF signals encoding the second message falls within a second Nyquist region. The first and second Nyquist regions are frequency ranges bounded by multiples of one-half of the sampling rate, and the second Nyquist region is different from the first Nyquist region. The system includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.

Abstract: In some examples, a system includes a receiver configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a mixer configured to down-convert the received signals to intermediate-frequency (IF) signals based on a local oscillator signal. The system further includes at least one analog-to-digital converter configured to sample the IF signals at a sampling rate. A frequency band of the IF signals encoding the first message falls within a first Nyquist region, and a frequency band of the IF signals encoding the second message falls within a second Nyquist region. The first and second Nyquist regions are frequency ranges bounded by multiples of one-half of the sampling rate, and the second Nyquist region is different from the first Nyquist region. The system includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.

Abstract: In some examples, a system includes at least two antennas configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a set of splitters configured to generate separate signals in the first, second, and third frequency bands. The system further includes a set of combiners, wherein each combiner of the set of combiners is configured to combine two or more of the separate signals. The system includes a set of mixers configured to down-convert the combined signals and at least one analog-to-digital converter configured to sample the down-converted signals. The system also includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.

Abstract: Described herein is a calibration circuit for a multiple element antenna with two or more antenna transmit and receive elements. In some examples the multi-element antenna may also include a beamforming network that combine the multiple antenna radiating element inputs and outputs with controlled phase and amplitude relationships such that spatial beams can be formed by varying the phase and amplitudes of two or more signals applied to antenna input ports for the antenna. The calibration circuit of this disclosure may be used to obtain data to determine phase and amplitude offsets induced by the combined transmission elements, and any phase and amplitude offsets induced by the transmitter or receiver circuitry. The determined phase and amplitude offsets may then be removed from received signal measurements and compensated for in transmit signal generation.

Abstract: In some examples, a system includes a receiver configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a mixer configured to down-convert the received signals to intermediate-frequency (IF) signals based on a local oscillator signal. The system further includes at least one analog-to-digital converter configured to sample the IF signals at a sampling rate. A frequency band of the IF signals encoding the first message falls within a first Nyquist region, and a frequency band of the IF signals encoding the second message falls within a second Nyquist region. The first and second Nyquist regions are frequency ranges bounded by multiples of one-half of the sampling rate, and the second Nyquist region is different from the first Nyquist region. The system includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.

Abstract: A mower may include a frame, a cutting deck suspended from the frame, and a cut height adjustment system configured for raising and lowering the cutting deck to a plurality of cut height positions. The cut height adjustment system may include a rotatable, stepped cylinder having a plurality of steps wherein each of the plurality of steps corresponds to one of the plurality of cut height positions, and a pawl may be configured for engagement with the plurality of steps in order to set the cutting deck at a desired cut height position. The stepped cylinder may be mounted to a rotatable base plate, and a knob may be attached to an upper end of a shaft connected to the base plate. Each of the plurality of cut height positions may be manually selectable by rotation of the knob.

Abstract: Described herein is a calibration circuit for a multiple element antenna with two or more antenna transmit and receive elements. In some examples the multi-element antenna may also include a beamforming network that combine the multiple antenna radiating element inputs and outputs with controlled phase and amplitude relationships such that spatial beams can be formed by varying the phase and amplitudes of two or more signals applied to antenna input ports for the antenna. The calibration circuit of this disclosure may be used to obtain data to determine phase and amplitude offsets induced by the combined transmission elements, and any phase and amplitude offsets induced by the transmitter or receiver circuitry. The determined phase and amplitude offsets may then be removed from received signal measurements and compensated for in transmit signal generation.

Abstract: A gearbox for an engine-driven mechanism comprises a gearbox housing having opposing walls. A first bearing bore is defined in one of the opposing walls and adapted for receiving an input shaft. A second bearing bore is defined in the other opposing wall and aligned with the first bearing bore. Each bearing bore mounts a bearing for supporting the input shaft which extends through the first bearing bore and into the gearbox. The second bearing bore includes an associated transparent and/or translucent lens to define a sight window for monitoring the level of oil in the gearbox. A sight window of this nature is particularly well suited for retrofitting older gearboxes which lack a sight window.

Abstract: The disclosure is generally directed to methods and compositions for reducing blood cholesterol levels, and more particularly to dietary supplements for reducing blood cholesterol levels. The dietary supplements for reducing cholesterol typically comprise at least one phytosterol source, at least one soluble fiber source, at least one guggulsterone source, and at least one policosanol source.

Abstract: An improved system for removing bitumen from tar sands comprises a pretreatment system utilizing a vibratory load hopper for classifying and sizing said tar sand particles communicating with a dryer for heating and drying said tar sand particles to a predetermined temperature thereby controlling the moisture content of said tar sands. An extraction system is also included for accepting said tar sands from the dryer comprising a plurality of extraction vessels arranged in series for transporting said tar sands from a first extraction vessel to a final extraction vessel. Furthermore, a solvent system for supplying a predetermined volume of solvent flow through said extraction vessels is employed, whereby solvent is supplied to the last extraction vessel and a solvent and bitumen mixture is withdrawn from the first extraction vessel.

Abstract: An improved system for removing bitumen from tar sands comprises a pre-treatment system utilizing a vibratory load hopper for classifying and sizing said tar sand particles communicating with a dryer for heating and drying said tar sand particles to a predetermined temperature thereby controlling the moisture content of said tar sands. An extraction system is also included for accepting said tar sands from the dryer comprising a plurality of extraction vessels arranged in series for transporting said tar sands from a first extraction vessel to a final extraction vessel. Furthermore, a solvent system for supplying a predetermined volume of solvent flow through said extraction vessels is employed, whereby solvent is supplied to the last extraction vessel and a solvent and bitumen mixture is withdrawn from the first extraction vessel.

Abstract: Most standard paintball markers or guns have no mounting apparatus for desired marker accessories such as a light or camera. The present invention is directed toward an accessory holder that includes a clamp adapted to be secured to the feed neck and which includes a pair of spaced apart arms carried by the clamp. The arms extend forwardly from the sides of the clamp. They are located just above the barrel and parallel thereto. The accessory is located between the arms and is secured directly thereto through the use of screws or the like or can be held by a strap connected to the arms that encircles the accessory. In addition, the vertical position of the arms can be adjusted relative to the clamp.

Abstract: A gearbox for an engine-driven mechanism comprises a gearbox housing having opposing walls. A first bearing bore is defined in one of the opposing walls and adapted for receiving an input shaft. A second bearing bore is defined in the other opposing wall and aligned with the first bearing bore. Each bearing bore mounts a bearing for supporting the input shaft which extends through the first bearing bore and into the gearbox. The second bearing bore includes an associated transparent and/or translucent lens to define a sight window for monitoring the level of oil in the gearbox. A sight window of this nature is particularly well suited for retrofitting older gearboxes which lack a sight window.

Abstract: A gearbox for an engine-driven mechanism comprises a gearbox housing having opposing walls. A first bearing bore is defined in one of the opposing walls and adapted for receiving an input shaft. A second bearing bore is defined in the other opposing wall and aligned with the first bearing bore. Each bearing bore mounts a bearing for supporting the input shaft which extends through the first bearing bore and into the gearbox. The second bearing bore includes an associated transparent and/or translucent lens to define a sight window for monitoring the level of oil in the gearbox. A sight window of this nature is particularly well suited for retrofitting older gearboxes which lack a sight window.

Abstract: Systems and methods for providing an improved multiradio system. An exemplary system includes first and second antennas and a first receiver that receives a signal from the first antenna, filters the received signal based on bandwidths associated with a traffic collision-avoidance system (TCAS), a transponder, and a universal access transceiver (UAT). The system digitizes the filtered signal and digitally downconverts the digitized signal. A second receiver receives a signal from the second antenna, filters the signal received from the second antenna based on the TCAS, the transponder, the UAT, and distance-measuring equipment (DME), separates the filtered signal into a first signal having a bandwidth associated with the TCAS, the transponder, the UAT and the lower half of the DME RF band, and into a second signal having a bandwidth associated with the upper half of the DME RF band, digitizes the first and second signal, and digitally downconverts the digitized first and second signals.

Abstract: Disclosed herein are caffeine-free dietary supplements for increasing energy in a subject and methods of administering the same. The method comprises administering to a subject a caffeine-free dietary supplement comprising omega-3 fatty acids, resveratrol, beta-alanine, gamma aminobutyric acid, and valerian root extract product, in amounts such that the supplement is effective for increasing energy and mental focus and relieving stress in the subject.

Abstract: Disclosed herein are caffeine-free dietary supplements for increasing energy in a subject and methods of administering the same. The method comprises administering to a subject a caffeine-free dietary supplement comprising omega-3 fatty acids, resveratrol, beta-alanine, gamma aminobutyric acid, and valerian root extract product, in amounts such that the supplement is effective for increasing energy and mental focus and relieving stress in the subject.

Abstract: Systems and methods for providing an improved multiradio system. An exemplary system includes first and second antennas and a first receiver that receives a signal from the first antenna, filters the received signal based on bandwidths associated with a traffic collision-avoidance system (TCAS), a transponder, and a universal access transceiver (UAT). The system digitizes the filtered signal and digitally downconverts the digitized signal. A second receiver receives a signal from the second antenna, filters the signal received from the second antenna based on the TCAS, the transponder, the UAT, and distance-measuring equipment (DME), separates the filtered signal into a first signal having a bandwidth associated with the TCAS, the transponder, the UAT and the lower half of the DME RF band, and into a second signal having a bandwidth associated with the upper half of the DME RF band, digitizes the first and second signal, and digitally downconverts the digitized first and second signals.

Abstract: The present invention provides monolithic structural catalysts. The catalysts have a thin wall structure and are advantageous for catalyzing reactions of gaseous fluid or liquid fluid molecules, such as the denitration or selective catalytic reduction (SCR) of nitrogen oxides (NOx) in combustion flue gases. In an embodiment, the honeycomb-like monolithic structural body includes catalytically active outer peripheral walls and a plurality of catalytically active thin-walled inner partition walls, the thin-walled inner partition walls adapted to enhance fluid flow through the monolithic catalytic body and to increase interaction of the fluid molecules with the catalyst body.

Abstract: A dietary supplement for enhancing physical performance of human subjects is disclosed. The supplement in dry, finely-divided form includes as a major ingredient a soy protein isolate containing at least 80% protein on a moisture-free basis with lesser amounts of carbohydrate, free form amino acids, medium chain triglycerides, creatine monohydrate, l-carnitine, grape seed extract, coenzyme Q10, piper nigrum extract, and alpha lipoic acid. In a preferred embodiment, the supplement also includes minor amounts of conjugated linoleic acid and phosphatidylserine/phosphatidylcholine complex.