Abstract: A Support Vector Machine trained responsive to mean and median values of standard and Shannon energy for a plurality of time and frequency intervals within a heart cycles provides for detecting coronary artery disease (CAD). A quality of an auscultatory sound time-series vector is assessed responsive to a vector distance and angle thereof in relation to a median heart cycle vector.

Abstract: An electronic data processor comprises a data storage device in communication with the electronic data processor. A control module stored in the data storage device, the control module comprising software instructions for execution by the electronic data processor to change dynamically the fundamental switching frequency of the control signals to reduce electromagnetic noise within a target frequency band if the fundamental switching frequency is equal to or greater than a threshold fundamental switching frequency.

Abstract: At least one swing value is determined responsive to a difference between maximum and minimum amplitude values of an auscultatory sound signal within a temporal region of a heart-cycle segment spanning an entire heart cycle of an auscultatory sound signal, wherein a location of at least one temporal region is responsive to a duration of the heart-cycle segment. S4 sound presence is detected responsive to ratio of S4SWING to S2SWING in relation an associated median value thereof from a population of test-subjects. A Support Vector Machine trained responsive to age, sex, S4 presence and a plurality of heart sound swing measures provides for detecting CAD. Unsupervised classification of an S3swing and median and mean values of a Short Time Fourier Transform within associated frequency intervals, based upon data from a plurality of heart cycles of a plurality of test-subject provides for detecting presence of an S3 sound.

Abstract: An electronic data processor comprises a data storage device in communication with the electronic data processor. A control module stored in the data storage device, the control module comprising software instructions for execution by the electronic data processor to change dynamically the fundamental switching frequency of the control signals to reduce electromagnetic noise within a target frequency band if the fundamental switching frequency is equal to or greater than a threshold fundamental switching frequency.

Abstract: One or more auscultation sensors attached to the skin of an at-least-prospectively contagiously-infected patient are connected via a corresponding associated one or more sensor cables so as to provide for one or more health care practitioners to listen to auscultation sounds from the one or more auscultation sensors from a relatively safe distance, without a need for close proximity to the patient when listening.

Abstract: An agricultural permittivity sensor has a drive electrode and a separate sense electrode. Both electrodes have surfaces that face the sensed material and the surfaces are co-planar. The drive electrode receives an excitation signal and generates an electric field that produces a current in the sense electrode. The current is indicative of a test weight of the sensed material.

Abstract: An agricultural permittivity sensor has a drive electrode and a separate sense electrode. Both electrodes have surfaces that face the sensed material and the surfaces are co-planar. The drive electrode receives an excitation signal and generates an electric field that produces a current in the sense electrode. The current is indicative of a test weight of the sensed material.

Abstract: An auscultatory sound signal from at least one auscultatory sound-or-vibration sensor is segmented into a plurality of associated heart cycle segments responsive to associated R-peak locations of an electrographic envelope signal representing an envelope response to an even power of an associated electrographic signal from an ECG sensor. A representation an envelope responsive to an even power of said auscultatory sound signal within said at least one heart cycle is locally modeled about at least a second peak to provide for locating the start of diastole of said at least one heart cycle.

Abstract: A pump and filter system and method. The system includes a housing with a housing inlet, a housing outlet, and a housing cavity, where the housing inlet is positioned above the housing outlet. The system also includes filtration media positioned inside the housing cavity and separating the housing inlet from the housing outlet, and a pump positioned at least partially inside the housing cavity. The pump includes a magnetic drive motor.

Abstract: A moisture sensor that has a drive electrode and a separate sense electrode is described. Both electrodes have surfaces that face the sensed material and the surfaces are co-planar. The drive electrode receives an excitation signal and generates an electric field that produces a current in the sense electrode. The current is indicative of moisture in the sensed material.

Abstract: Embodiments of the invention provide a constant flow variable speed pump for use in a recirculating aquaculture application. The pump includes a housing with an inlet and an outlet, an impeller positioned within the housing, and a motor coupled to the impeller and configured to rotate the impeller within the housing, causing water flow through the recirculating aquaculture application. The pump also includes a controller in communication with the motor and configured to drive the motor. The controller is configured to adjust a speed of the motor to maintain a first flow rate through the recirculating aquaculture application between a first start time and a first stop time according to a first user-defined schedule, and to maintain a second flow rate through the recirculating aquaculture application between a second start time and a second stop time according to a second user-defined schedule.

Abstract: A moisture sensor that has a drive electrode and a separate sense electrode is described. Both electrodes have surfaces that face the sensed material and the surfaces are co-planar. The drive electrode receives an excitation signal and generates an electric field that produces a current in the sense electrode. The current is indicative of moisture in the sensed material.

Abstract: Embodiments of the invention provide a pool cleaner control system including a laser range finder with a first laser line generator, a second laser line generator, and a camera. The first laser line generator and the second laser line generator are positioned to emit parallel laser lines and the camera is positioned to capture an image of the laser lines projected on an object. The control system also includes a controller in communication with the laser range finder and configured to control operation of the laser line generators to emit the laser lines and to control the camera to capture the image. The controller is also configured to receive the image from the camera, calculate a pixel distance between the laser lines in the image, and calculate the physical distance between the camera and the object based on the pixel distance.

Abstract: Embodiments of the invention provide a pool cleaner control system including a laser range finder with a first laser line generator, a second laser line generator, and a camera. The first laser line generator and the second laser line generator are positioned to emit parallel laser lines and the camera is positioned to capture an image of the laser lines projected on an object. The control system also includes a controller in communication with the laser range finder and configured to control operation of the laser line generators to emit the laser lines and to control the camera to capture the image. The controller is also configured to receive the image from the camera, calculate a pixel distance between the laser lines in the image, and calculate the physical distance between the camera and the object based on the pixel distance.

Abstract: A system for balancing energy being consumed by a first device against the available energy being produced by a second separate device. One application for the invention is monitoring the amount of energy being produced by a photovoltaic array and using that information to control a load so that the load consumes substantially the same amount of energy as is then being produced by the array.

Abstract: A mixing syringe having a first sealed chamber containing a powder (powder housing) and a second sealed chamber containing a liquid (liquid housing). When the user needs to inject a patient, he or she holds the mixing syringe approximately upright and depresses a plunger. This motion causes a piercer to pierce a foil seal separating the two chambers. The liquid then drops down into the powder housing. The liquid flows through a passage in a piston located in the powder housing, where it then comes in contact with the powder itself. As the user continues pressing the plunger downward, the piercer comes to rest within the piston and seals the passage through the piston, thereby locking the piercer and piston together. The device is then ready for an injection. As the plunger is further depressed, the piston expels the powder and liquid mixture through a needle.

Abstract: A system for balancing energy being consumed by a first device against the available energy being produced by a second separate device. One application for the invention is monitoring the amount of energy being produced by a photovoltaic array and using that information to control a load so that the load consumes substantially the same amount of energy as is then being produced by the array.

Abstract: An underwater light that can include a mounting assembly attachable to a pool wall without having to make a niche in the wall, a housing coupled to the mounting assembly and including a light source cavity, a reflector in the light source cavity, a light source in front of the reflector, and a lens in front of the light source. The lens can include a plurality of contiguous parallel concave lens elements extending in a single direction to disperse light perpendicular to the single direction. The underwater light can include a removable lens cover that is at least one of red, green, yellow, and blue, in order to shine colored light into the pool.

Abstract: A mixing syringe having a first sealed chamber containing a powder (powder housing) and a second sealed chamber containing a liquid (liquid housing). When the user needs to inject a patient, he or she holds the mixing syringe approximately upright and depresses a plunger. This motion causes a piercer to pierce a foil seal separating the two chambers. The liquid then drops down into the powder housing. The liquid flows through a passage in a piston located in the powder housing, where it then comes in contact with the powder itself. As the user continues pressing the plunger downward, the piercer comes to rest within the piston and seals the passage through the piston, thereby locking the piercer and piston together. The device is then ready for an injection. As the plunger is further depressed, the piston expels the powder and liquid mixture through a needle.