Abstract: Embodiments include systems and or methods directed to ultrasound calibration, real-time C-mode approaches, calibration using a plate target, a ball-and-socket scan mechanism, a spherical spiral path scan mechanism, and a wireless disposable laryngoscope.

Abstract: The invention provides methods of identifying the gene expression profile of a cell type present within a population of cells using single cell expression data by a residual minimization process. The methods of the invention can be used to infer the genes expressed by a rare cell type that can be difficult to measure experimentally due to its low abundance in an organism or sample of interest. The methods described herein can additionally be used to predicting the gene expression profile of a population of cells using single cell expression patterns as well as methods of quantitating the composition of a population.

Abstract: Embodiments include systems and or methods directed to ultrasound calibration, real-time C-mode approaches, calibration using a plate target, a ball-and-socket scan mechanism, a spherical spiral path scan mechanism, and a wireless disposable laryngoscope.

Abstract: A new pipeline for the rational design and interpretation of biomarker panels is provided. The pipeline includes: generating the maximally informative marker set from biomarker databases; selecting an optimal biomarker panel based on the desired accuracy, economic, and experimental constraints; and interpreting the assay results by a statistically robust matching to reference data. The pipeline can also be used to identify biological samples, including cell types and progenitor cells.

Abstract: Fuels cells, electrode assemblies, and electrodes that comprise silicon and/or sol-gel derived support structures, as well as to methods relating thereto, are disclosed herein. In one embodiment, the invention is directed to an electrode assembly adapted for use with a fuel cell comprises: an anode derived from a first planar silicon substrate; an electrolyte; a cathode derived from a second planar silicon substrate; wherein the anode and the cathode are parallel to each other and separated by an interstitial region comprising the electrolyte. In another embodiment, the invention is directed to electrode adapted for use with a fuel cell, wherein the electrode comprises a silicon substrate that functions as a current conductor, wherein the silicon substrate has a plurality of pores that define pore surfaces, wherein at least a portion of the pore surfaces have a catalyst thereon, wherein the catalyst is derived from one or more metallic precursors chemisorbed onto at least the pore surfaces.

Abstract: Apparatus for measuring the power of radiation that includes float means (16) and force balancing means (48, 50, 60, 80). The float means includes a target (46) for the radiation and is constructed such that the net gravitational force, including buoyancy force, if any, acting on the float means tends to accelerate the float means in a first direction. The force balancing means includes drive means (80) for providing a drive signal and means (50) responsive to the drive signal for exerting a balancing force on the float means in a second direction opposite the first direction, such that the magnitude of the balancing force corresponds to a characteristic of the drive signal.

Abstract: An apparatus for calibrating a force measuring instrument of the type that includes a force sensitive element submerged in a liquid. The apparatus comprises a magnetic object having a known weight when submerged in the liquid, and an electromagnet. The electromagnet includes a core having a first end that extends beneath the surface of the liquid to a position near the upper surface of the force sensitive element. The electromagnet further includes a coil surrounding a portion of the core, means for energizing and deenergizing the coil, and a thermal insulator surrounding the first end of the core to prevent the core from contacting the liquid and to limit heat flow from the core into the liquid. When the coil is energized, the magnetic object is picked up from the force sensitive element and adheres to the insulator. When the electromagnet is deenergized, the magnetic object falls back onto the force sensitive element for calibration of the instrument.

Abstract: A precision acoustic source that is capable of producing acoustic radiation having peak and average power levels that are independently and simultaneously adjustable. The apparatus comprises an acoustic transducer and drive means for producing a drive signal comprising a series of drive pulses to the transducer, such that the transducer produces acoustic radiation having selected peak and average power levels. The drive means comprises means for establishing a series of fixed-length clock cycles, means for generating a series of trigger signals, pulse generating means responsive to each trigger signal to produce a selected number of standard pulses, an amplifier for generating a drive pulse in response to each standard pulse. The amplifier adjusts the amplitude of each drive pulse such that the peak power of the acoustic radiation is equal to the selected peak power level. Each trigger signal occurs either R or S clock cycles after the preceding trigger signal, R and S being positive integers.

Abstract: A torch having oxygen and fuel gas passages from the torch butt to the torch tip, and valving apparatus for controlling the flow of oxygen and fuel gas from fuel and oxygen adapters on the torch butt to said passages, the valving apparatus including a valve seat, a valve stem, a first ball retained in a valve stem bore for rotation relative to the valve stem and abuttable against the valve seat to block fluid flow therethrough while the valve stem is spaced from the valve seat and a second ball rotatably mounted in a valve stem bore to abut against the first ball axially opposite the valve seat, and lubricant for being transferred from the second ball to the first ball as the valve stem rotates relative the first ball and the first ball rotates relative to the second ball, the first ball being of a substantially larger diameter than the second ball.