Abstract: Systems and methods for text-based secure order processing are disclosed. The system may receive an order initiation request from a user device. Based on the order initiation request, the system may retrieve a conversational order script having one or more scripted conversation prompts. The system may transmit the conversation prompts to the user device and receive one or more conversation responses from the user device. Based on the conversation responses, the system may transmit a purchase link to the user device. The purchase link may allow the user device to access a web interface to complete the purchase order.

Abstract: Systems and methods for text-based secure order processing are disclosed. The system may receive an order initiation request from a user device. Based on the order initiation request, the system may retrieve a conversational order script having one or more scripted conversation prompts. The system may transmit the conversation prompts to the user device and receive one or more conversation responses from the user device. Based on the conversation responses, the system may transmit a purchase link to the user device. The purchase link may allow the user device to access a web interface to complete the purchase order.

Abstract: Systems and methods for text-based secure order processing are disclosed. The system may receive an order initiation request from a user device. Based on the order initiation request, the system may retrieve a conversational order script having one or more scripted conversation prompts. The system may transmit the conversation prompts to the user device and receive one or more conversation responses from the user device. Based on the conversation responses, the system may transmit a purchase link to the user device. The purchase link may allow the user device to access a web interface to complete the purchase order.

Abstract: An inexpensive disposable plastic flow body interchangeably flow connects in line a conduit flowing fluid, and also, concurrently, acoustically connects to one or more ultrasonic transducers, so as to serve as an acoustic chamber for use with an ultrasonic flowmeter in the measurement of fluid flow velocity and/or volume. The flow connection is preferably accomplished by plugging, preferably by inserting nozzles into surgical tubing. The external ultrasonic transducer(s) is (are) normally connected under pressured contact, typically under spring forces which are preferably of external origin. Acoustic-coupling elements in the walls of the acoustic chamber serve to match the acoustic impedance of the flow body to acoustic impedance of blood. The disposable plug-connected flow body is particularly safe, sterile and convenient for extracorporeal ultrasonic blood flow measurement.

Abstract: Multiple, typically four, acoustic transducers of a time delay acoustic flowmeter are arrayed in a X-cross, crisscross, folded geometry so as to establish a lengthy multiple-leg, typically a two-leg, acoustic path within a compact volume. An ultrasonic signal is transmitted from a transducer A to a transducer B, then electrically amplified and applied to a transducer C which retransmits the ultrasonic signal to a transducer D. The compact transducer configuration is particularly suitable for use during in-vivo blood flow measurement. The acoustic signal is maintained in amplitude from one leg to the next by amplification as an electrical signal.

Abstract: Preferred transducers in the substantial shapes of a three-dimensional bodies, normally spheres or cylinders, emit ultrasound omni-directionally. The transducers are secured to the wall of the cervix uteri of human female, preferably by a barb or corkscrew coil, so that a straight line ultrasonic acoustic path exists between them. An ultrasonic transit time sonomicrometer detecting a variable propagation delay between the transducers dependent upon the dilatation or effacement of the cervix uteri serves as a ultrasonic cervimeter. Cervical dimension, and changes in dimension, developed by the ultrasonic cervimeter directly in millimeters are (i) validated for reasonableness, (ii) monitored so as to generate several alarms upon the occurrence(s) of several predetermined conditions, (iii) displayed, and (iv) archived all in a battery-powered ambulatory instrument.

Abstract: In an acoustic flowmeter of the transit time or Doppler type the electro/acoustic, and/or acousto/electric, gain of one or more elongate acoustic transducers is varied spatially along the length of the transducer. When the transducer(s) are situated across the width of a lumen that is both flowing fluid and surrounded by material that attenuates sound differently that does the fluid during acoustic fluid flow measurement, the differing transducer(s') gain(s) serves to compensate for differing acoustic attenuations in different acoustic paths. Particularly during in-vivo acoustic blood flow measurement, the non-uniform acoustic gain(s) serves to compensate for the differing acoustic attenuations of blood and tissue, commonly fat, surrounding a blood vessel, and to produce a more accurate measurement of blood flow.

Abstract: An improved process for the measurement of blood circulation by means of colored microspheres is presented, which process replaces the previous counting procedure when using colored microspheres by a rapidly reproducible measurement method. This avoids the complicated and expensive use of radioactively labelled microspheres. At the same time, a coloring process for the preparation of the microspheres is presented which is distinguished by homogeneous and intensive coloration of the microspheres.

Abstract: Microspheres labeled with a dye for which the absorption spectra is known permit the measurement of blood flows, particularly regional myocardial blood flow (RMBF), without radiation safety concerns and radioactive waste disposal problems. Polystyrene spheres, nominally of diameter 15.+-.0.1 [SD] um and density 1.09 g/ml, are dyed with a fixed quantity, nominally 30 picograms per microsphere, with one of several, nominally 5, colored dyes. The colored microspheres (CM) are injected into the left atrium or into a coronary perfusion. The CM are extracted from myocardium and blood by digestion with KOH and subsequent microfiltration. The dyes are then recovered from the CM within a defined volume of a solvent, and their concentrations are determined by spectrophotometry. The composite absorbance or emission spectra of several dyes are mathematically resolved using matrix inversion. Leaching of dye from the CM was less than 0.

Abstract: A mouse which senses six degrees of motion arising from movement of the mouse within three dimensions. A hand-held device includes three accelerometers for sensing linear translation along three axes of a Cartesian coordinate system and three angular rate sensors for sensing angular rotation about the three axes. Signals produced by the sensors are processed to permit the acceleration, velocity and relative position and attitude of the device to be conveyed to a computer. Thus, a person may interact with a computer with six degrees of motion in three-dimensional space. Computer interface ports and unique address identification ensure proper communication with the computer regardless of the orientation of the mouse.

Abstract: A transducer fabricated by micro-machining includes E-shaped leaf springs suspending a mass from a support. The transducer is formed by chemical etching through openings of opposite faces of a silicon wafer on which etch stop layer patterns are diffused. Sense and force conductive patterns are diffused onto opposite faces of the suspended mass. The legs of the E-shaped leaf springs are formed of a composite of a polysilicon base layer, a silicon dioxide insulating layer and a gold conducting layer. The thickness of such layers are selected to minimize bowing effects of the spring legs due to materials of different coefficients of thermal expansion. The spring-mass-support structure is sandwiched between opposite plates having corresponding force and conductive patterns which face such patterns on the suspended mass.

Abstract: A spring-mass-support structure is arranged as an accelerometer with two electrostatic feedback loops so as to measure two components of acceleration. Two of such accelerometers are advantageously used on a submerged platform to determine the direction of a sound source in a body of water. One of such feedback loops of each accelerometer is used to measure low frequency gravitational acceleration applied to the platform as a result of the tilt of the platform due to the action of current and wave action of the water. The other of the feedback loops of each accelerometer measures sound wave induced acceleration on the platform. The gravitational acceleration of each accelerometer is used to compensate the higher frequency acceleration for the effect of tilt of the platform.

Abstract: The transducer is fabricated using micro-machining techniques of a silicon wafer. The transducer includes E-shaped leaf springs of silicon dioxide suspending a mass from a support. The transducer is formed by chemical etching through openings of opposite faces of a silicon wafer on which etch stop layer patterns are diffused. Sense and force conductive patterns are diffused onto the opposite faces of the suspended mass. The spring-mass-support structure is then sandwiched between opposite plates having corresponding sense and force conductive patterns which face such patterns on the suspended mass. Circuitry is provided by which a sense voltage and a force voltage are applied between opposite sense and force conductive patterns of the opposite plates creating a sense electric field and a force electric field across the sense and force patterns of the mass. A feedback circuit arrangement is provided to maintain the mass at a predetermined reference position between the support plates.