Abstract:
An apparatus and method for non-invasive determination of attributes of human tissue by quantitative infrared spectroscopy. The system includes subsystems optimized to contend with the complexities of the tissue spectrum, high signal-to-noise ratio and photometric accuracy requirements, tissue sampling errors, calibration maintenance problems, and calibration transfer problems. The subsystems include an illumination subsystem, a tissue sampling subsystem, a spectrometer subsystem, a data acquisition subsystem, and a processing subsystem. The invention is applicable, as examples, to determining the concentration or change of concentration of alcohol in human tissue.
Abstract:
The homing tag (1) has a transmissive housing (3), which is attached to a cartridge case (5). The transmissive housing (3) includes an aft body (7) to provide an interface with the cartridge case (5). Rotating bands (9) are located at a leading edge of the aft body (7). The transmissive housing (3) further includes a central body (11). The ogive-shaped nose (13) is formed of transparent material. A pluralit of slots (15) are provided for cooling the transmissive housing (3).
Abstract:
A method of detefnnining a measure of a tissue state (e.g., glycation end-product or disease state) in an individual. A portion of the tissue of the individual is illuminated with excitation light, then light emitted by the tissue due to fluorescence of a chemical with the tissue responsive to the excitation light is detected. The detected light can be combined with a model relating fluorescence with a measure of tissue state to determine a tissue state. The invention can comprise single wavelength excitation light, scanning of excitation light (illuminating the tissue at a plurality of waveliengths), detection at a single wavelength, scanning of detection wavelengths (detecting emitted light at a plurality of wavelengths), and combinations thereof. The invention also can comprise correction techniques that reduce determination errors due to detection of light other than that from fluorescence of a chemical in the tissue. For example, the reflectance of the tissue can lead to errors if appropriate correction is not employed. The invention can also comprise a variety of models relating fluorescence to a measure of tissue state, including a variety of methods for generating such models. Other biologic information can be used in combination with the fluorescence properties to aid in the determination of a measure of tissue state. The invention also comprises apparatuses suitable for carrying out the method, including appropriate light sources, detectors, and models (for example, implemented on computers) used to relate detected fluorescence and a measure of tissue state.
Abstract:
The present invention relates generally to non-invasive methods and apparatuses for determining analyte properties of a subject and identity characteristics of a subject. Embodiments of the present invention provide analyte property determination and identity determination or verification from the same spectroscopic information, making unauthorized use or misleading results less likely that in systems that include separate analyte and identity determinations. The invention can be used to control and monitor individuals accessing controlled environments.
Abstract:
An apparatus includes a first gunsight and a second gunsight, where both the first and the second sights are configured to be positioned on a forward portion of a barrel of a firearm. According to an embodiment, a third gunsight may be configured to be positioned on the forward portion of the barrel. The gunsight may be interchangeable with different gunsights.
Abstract:
A method of determining a measure of a tissue state (e.g., glycation end-product or disease state) in an individual is disclosed. A portion of the skin of the individual is illuminated with excitation light, then light emitted by the tissue due to fluorescence of a chemical with the tissue responsive to the excitation light is detected. The detected light can be combined with a model relating fluorescence with a measure of tissue state to determine a tissue state. The invention can illuminate the skin and detect responsive light over a time that spans a plurality of cardiac cycles of the individual, which can, as an example, help mitigate the effects of time-varying signals such as those due to hemoglobin. The invention can also determine the amount of light to be directed to the skin, for example by controlling the time that a light source is energized. The amount of illumination light can be determined from a skin reflectance characteristic such as pigmentation or melanin in the skin. Controlling the amount of light directed to the tissue can reduce the dynamic range required of a corresponding optical system, for example by allowing a single system to accurately measure individuals with very light skin and individuals with very dark skin.
Abstract:
A handicap-accessible bath facility (10), and a method of making the same, involves a two piece modular wall (22) having a height and a length which are less than the height and length of an existing room (16) in which the bath facility is to be mounted. The modular wall comprises top and bottom wall assemblies (42, 44) which are placed parallel to a first existing wall (14) and abutting a second existing wall (16) to form a shower compartment (124). A factory molded shower base (24) is placed on an existing floor (21) in the shower compartment and defines a shower-base ramp (94) at an entrance to the compartment. A barrier line (98) at the top of the ramp, between the ramp and a drain depression (90) formed in the shower base prevents water from flowing out of the shower compartment. Wall panels (26, 28, 30) line the shower compartment and engage a vertical lip (100) of the shower base for preventing water from leaving the shower compartment at intersections of these panels with the shower base. A vanity top (32), with right angled edges (106, 108) forms a brace between the modular wall and the second existing wall. A commode (36), sink (34), and light (40) are mounted on an outside surface of the modular wall.
Abstract:
Embodiments of the present invention provide an apparatus suitable for determining properties of in vivo tissue from spectral information collected from the tissue. An illumination system provides light at a plurality of broadband ranges, which are communicated to an optical probe. The optical probe receives light from the illumination system and transmits it to in vivo tissue, and receives light diffusely reflected in response to the broadband light, emitted from the in vivo tissue by fluorescence thereof in response to the broadband light, or a combination thereof. The optical probe communicates the light to a spectrograph which produces a signal representative of the spectral properties of the light. An analysis system determines a property of the in vivo tissue from the spectral properties. A calibration device mounts such that it is periodically in optical communication with the optical probe.
Abstract:
An apparatus for 3-axis aerodynamic control of multi-caliber bodies comprising three shafts each having at least one canard; bevel gears attached to said shafts; and a set of three miniature stepper motors, each driving a zero backlash spur assembly attached to the drive bevel gears.