CROSS AMPLITUDE MODULATION ULTRASOUND PULSE SEQUENCE

    公开(公告)号:WO2019204506A1

    公开(公告)日:2019-10-24

    申请号:PCT/US2019/027960

    申请日:2019-04-17

    Abstract: Certain aspects pertain to a cross-amplitude modulation (xAM) ultrasound transducer system that include one or more transducers, and first and second subapertures of transducer elements of the one or more transducers. The first subaperture configured to transmit a first ultrasound plane wave when excited. The second subaperture configured to transmit a second ultrasound plane wave when excited. The second ultrasound plane wave is noncollinear to the first ultrasound plane wave and axisymmetric to the first ultrasound plane wave about a bisector. The first and second subapertures are configured to transmit an xAM ultrasound pulse sequence by transmitting the first ultrasound plane wave, transmitting the second ultrasound plane wave, and simultaneously transmitting both first and second ultrasound plane waves. The first and second ultrasound plane wave are configured to generate an acoustic pressure that is above a threshold along the bisector.

    DUAL FREQUENCY ULTRASONIC AND SONIC ACTUATOR WITH CONSTRAINED IMPACT MASS

    公开(公告)号:WO2019191330A1

    公开(公告)日:2019-10-03

    申请号:PCT/US2019/024429

    申请日:2019-03-27

    Abstract: A dual frequency ultrasonic and sonic actuator with constrained impact mass is presented. According to one aspect, displacement of the impact mass is constrained by cavity to which ultrasonic stress from the tip of a horn is applied. According to another aspect, the displacement of the impact mass is constrained by a spring attached to the tip of the horn. According to another aspect, the displacement of the impact mass is constrained by a flexure. The constrained impact mass converts the ultrasonic stress to lower frequency sonic stress that is coupled to a transmitting element for transmission through a surface. According to one aspect, the transmitting element is a longitudinal probe. According to another aspect, the transmitting element is a drill bit used to penetrate though the surface. According to another aspect, the transmitting element is a thumper used to transmit elastic waves though the surface.

    CONTROLLABLE OCULAR PHOTOTHERAPY
    48.
    发明申请

    公开(公告)号:WO2019152526A1

    公开(公告)日:2019-08-08

    申请号:PCT/US2019/015863

    申请日:2019-01-30

    Abstract: Embodiments of the present disclosure are directed to a wearable phototherapy eye device. In an example, phototherapy can be controlled by varying an emission property of light emitted from the wearable phototherapy eye device to a user eye. In particular, the wearable phototherapy eye device includes a light source oriented to emit the light towards the user eye. The wearable phototherapy eye device also includes controls, such as electrical, mechanical, and/or electro-mechanical controls, to vary the emission property of the light based on an emission target associated with a sleep phase.

    LOOP-MEDIATED ISOTHERMAL AMPLIFICATION (LAMP) BASED ASSAY FOR DETECTING MICROBES

    公开(公告)号:WO2019136034A8

    公开(公告)日:2019-07-11

    申请号:PCT/US2018/068216

    申请日:2018-12-31

    Abstract: A method and system are disclosed for detecting microbial pathogens in a sample suspected of containing the pathogens. The method includes combining loop-mediated isothermal amplification (LAMP) reagents and a polymer gel, such as a hydrogel, together with the sample to form a mixture. The gel polymerizes over a short time to immobilize the viral particles within the mixture. If target DNA/RNA are present in the sample, amplicons are produced. The target microorganisms are detected by visually detecting the presence or absence of the amplicons. The target microorganism concentrations may be determined based on the number of fluorescent amplicon dots after the reaction using a smartphone or a fluorescent microscope. The method may be employed for rapidly and inexpensively quantifying microbial pathogens in environmental water samples with high sensitivity.

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