Abstract: An antenna structure includes a first signal connector and a second signal connector. The antenna structure further includes a cavity antenna defined by a set of planar walls. The cavity antenna is coupled to the first signal connector and configured to emit a field polarized linearly in a first direction when driven by a signal at the first signal connector. The antenna structure further includes a dipole antenna defined by a pair of arms that are integrated with a wall of the cavity antenna. The dipole antenna is coupled to the second signal connector and configured to a field polarized linearly in a second direction offset from the first direction when driven by a signal at the second signal connector.

Abstract: A robotic cleaner includes a housing, a suction conduit with an opening, and a leading roller mounted in front of a brush roll. An inter-roller air passageway may be defined between the leading roller and the brush roll wherein the lower portion of the leading roller is exposed to a flow path to the suction conduit and an upper portion of the leading roller is outside of the flow path. Optionally, a combing unit includes a plurality of combing protrusions extending into the leading roller and having leading edges not aligned with a center of the leading roller. Optionally, a sealing strip is located along a rear side of the opening and along a portion of left and right sides of the opening. The underside may define side edge vacuum passageways extending from the sides of the housing partially between the leading roller and the sealing strip towards the opening.

Abstract: An antenna structure includes a first signal connector and a second signal connector. The antenna structure further includes a cavity antenna defined by a set of planar walls. The cavity antenna is coupled to the first signal connector and configured to emit a field polarized linearly in a first direction when driven by a signal at the first signal connector. The antenna structure further includes a dipole antenna defined by a pair of arms that are integrated with a wall of the cavity antenna. The dipole antenna is coupled to the second signal connector and configured to a field polarized linearly in a second direction offset from the first direction when driven by a signal at the second signal connector.

Abstract: A sum and difference mode antenna includes a first radiator, a second radiator, a first excitation source, and a second excitation source. The first radiator includes a first segment, a second segment, and a gap formed between the first segment and the second segment, and the first excitation source is configured to feed the first radiator, so that currents in the first segment and the second segment both flow in a first direction. The second radiator includes a third segment, a fourth segment, and a fifth segment. The third segment and the fourth segment are symmetrically distributed on two sides of a connection end of the fifth segment, and the second excitation source is electrically connected to a feed end of the fifth segment to feed the second radiator.

Abstract: This invention relates to compositions and methods for enhanced differentiation of cells towards a neuronal phenotype. Neuronal cells produced using the compositions and methods may be used in the study of neurological diseases and disorders, for drug screening and for therapeutic purposes. The invention provides a method for producing a neuron comprising inducing neuronal differentiation of a cell, wherein neuronal differentiation in said cell is induced by inhibition of Small Mothers Against Decapentaplegic (SMAD) signaling and nitric oxide synthase (NOS) in said cell.

Abstract: Systems and methods are provided for frequency adjustment of graphics process units (GPUs). A system includes: a command parser configured to parse one or more first commands associated with one or more future GPU operations to obtain command information, a processing component configured to determine an operation time for the future GPU operations based at least in part on the command information, and a frequency control component configured to adjust a GPU frequency based at least in part on the operation time for the future GPU operations.

Abstract: An antenna system includes a plurality of antenna assemblies. The antenna assemblies include a driven component and a director array to increase the gain of the antenna assembly. For each antenna assembly of the plurality of antenna assemblies, the driven component and director array are disposed in an antenna plane. Each antenna assembly is arranged in a different geometrical plane.

Abstract: Systems and methods are provided for frequency adjustment of graphics process units (GPUs). A system includes: a command parser configured to parse one or more first commands associated with one or more future GPU operations to obtain command information, a processing component configured to determine an operation time for the future GPU operations based at least in part on the command information, and a frequency control component configured to adjust a GPU frequency based at least in part on the operation time for the future GPU operations.

Abstract: A smart antenna assembly includes a driving monopole element and an array of parasitic monopole elements arranged in an annular array around the driving monopole element, wherein the parasitic monopole elements are of bent or curved configuration, bending or curving towards the driving monopole element. Preferably, each parasitic monopole element has a portion thereof which is parallel or substantially parallel to the driving monopole element. The assembly provides a compact steerable antenna assembly.

Abstract: A smart antenna includes a plurality of parasitic antenna elements provided with varactors, a voltage supply arranged to be coupled to the varactors and operable to supply a DC voltage, and a control unit operable to tune DC voltages applied to the varactors, wherein each parasitic antenna element can be reconfigured either as a reflector or a director on the basis of the voltage applied thereto. The driven element is surrounded by first and second 10 annular arrays of parasitic elements at radii of substantially 25 and 50 mm respectively, each annular array including six antenna elements. The array is configurable for steering the beam. The arrangement is compact and efficient.

Abstract: A smart antenna assembly includes a driving monopole element and an array of parasitic monopole elements arranged in an annular array around the driving monopole element, wherein the parasitic monopole elements are of bent or curved configuration, bending or curving towards the driving monopole element. Preferably, each parasitic monopole element has a portion thereof which is parallel or substantially parallel to the driving monopole element. The assembly provides a compact steerable antenna assembly.

Abstract: A method, apparatus, system, and article of manufacture provide the ability to utilize fingertip tracking technology during the course of a medical examination. A sensor is mounted on a fingertip of a finger of a first person. Such a sensor is communicatively coupled to a computer to record measurements. The sensor is calibrated using a known target. The finger having the sensor is then engaged to perform a medical examination directly on a second person. Measurements are obtained from the sensor on the fingertip during the medical examination. Data is obtained (e.g., via calculations or interpolation) based on the measurements.